loncom/interface/lonnavmaps.pm - diff

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Diff for /loncom/interface/lonnavmaps.pm between versions 1.207 and 1.374

version 1.207, 2003/06/18 15:14:23	version 1.374, 2006/03/23 22:32:10
Line 25	Line 25
#	#
# http://www.lon-capa.org/	# http://www.lon-capa.org/
#	#
# (Page Handler	###
#
# (TeX Content Handler
#
# 05/29/00,05/30 Gerd Kortemeyer)
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
# 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer)
#
# 3/1/1,6/1,17/1,29/1,30/1,2/8,9/21,9/24,9/25 Gerd Kortemeyer
# YEAR=2002
# 1/1 Gerd Kortemeyer
# Oct-Nov Jeremy Bowers
# YEAR=2003
# Jeremy Bowers ... lots of days

package Apache::lonnavmaps;	package Apache::lonnavmaps;

use strict;	use strict;
	use GDBM_File;
use Apache::Constants qw(:common :http);	use Apache::Constants qw(:common :http);
use Apache::loncommon();	use Apache::loncommon();
use Apache::lonmenu();	use Apache::lonmenu();
	use Apache::lonenc();
	use Apache::lonlocal;
	use Apache::lonnet;
use POSIX qw (floor strftime);	use POSIX qw (floor strftime);
use Data::Dumper; # for debugging, not always used	use Data::Dumper; # for debugging, not always
	use Time::HiRes qw( gettimeofday tv_interval );

# symbolic constants	# symbolic constants
sub SYMB { return 1; }	sub SYMB { return 1; }
Line 61 my $resObj = "Apache::lonnavmaps::resour	Line 53 my $resObj = "Apache::lonnavmaps::resour
# Keep these mappings in sync with lonquickgrades, which uses the colors	# Keep these mappings in sync with lonquickgrades, which uses the colors
# instead of the icons.	# instead of the icons.
my %statusIconMap =	my %statusIconMap =
( $resObj->NETWORK_FAILURE => '',	(
$resObj->NOTHING_SET => '',	$resObj->CLOSED => '',
$resObj->CORRECT => 'navmap.correct.gif',	$resObj->OPEN => 'navmap.open.gif',
$resObj->EXCUSED => 'navmap.correct.gif',	$resObj->CORRECT => 'navmap.correct.gif',
$resObj->PAST_DUE_NO_ANSWER => 'navmap.wrong.gif',	$resObj->PARTIALLY_CORRECT => 'navmap.partial.gif',
$resObj->PAST_DUE_ANSWER_LATER => 'navmap.wrong.gif',	$resObj->INCORRECT => 'navmap.wrong.gif',
$resObj->ANSWER_OPEN => 'navmap.wrong.gif',	$resObj->ATTEMPTED => 'navmap.ellipsis.gif',
$resObj->OPEN_LATER => '',	$resObj->ERROR => ''
$resObj->TRIES_LEFT => 'navmap.open.gif',	);
$resObj->INCORRECT => 'navmap.wrong.gif',
$resObj->OPEN => 'navmap.open.gif',
$resObj->ATTEMPTED => 'navmap.ellipsis.gif',
$resObj->ANSWER_SUBMITTED => '' );

my %iconAltTags =	my %iconAltTags =
( 'navmap.correct.gif' => 'Correct',	( 'navmap.correct.gif' => 'Correct',
Line 94 my %colormap =	Line 82 my %colormap =
$resObj->OPEN => '',	$resObj->OPEN => '',
$resObj->NOTHING_SET => '',	$resObj->NOTHING_SET => '',
$resObj->ATTEMPTED => '',	$resObj->ATTEMPTED => '',
$resObj->ANSWER_SUBMITTED => ''	$resObj->ANSWER_SUBMITTED => '',
	$resObj->PARTIALLY_CORRECT => '#006600'
);	);
# And a special case in the nav map; what to do when the assignment	# And a special case in the nav map; what to do when the assignment
# is not yet done and due in less then 24 hours	# is not yet done and due in less then 24 hours
my $hurryUpColor = "#FF0000";	my $hurryUpColor = "#FF0000";

	sub launch_win {
	my ($mode,$script,$toplinkitems,$firsttime)=@_;
	my $result;
	if ($script ne 'no') {
	$result.='<script type="text/javascript">';
	}
	if ($firsttime) {
	$result.='function launch_navmapwin() {
	newWindow=open(\'/adm/navmaps?launchExternalRoles\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
	}';
	} else {
	$result.='function launch_navmapwin() {
	newWindow=open(\'/adm/navmaps?launchExternal\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');
	}';
	}
	if ($mode eq 'now') {
	$result.="\nlaunch_navmapwin();\n";
	}
	if ($script ne 'no') {
	$result.='</script>';
	}
	if ($mode eq 'link') {
	&add_linkitem($toplinkitems,'launchnav','launch_navmapwin()',
	"Launch navigation window");
	}
	return $result;
	}

	sub close {
	if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
	return(<<ENDCLOSE);
	<script type="text/javascript">
	window.status='Accessing Nav Control';
	menu=window.open("/adm/rat/empty.html","loncapanav",
	"height=600,width=400,scrollbars=1");
	window.status='Closing Nav Control';
	menu.close();
	window.status='Done.';
	</script>
	ENDCLOSE
	}

	sub update {
	if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
	if (!$env{'request.course.id'}) { return ''; }
	if ($ENV{'REQUEST_URI'}=~m\|^/adm/navmaps\|) { return ''; }
	return(<<ENDUPDATE);
	<form name="navform"></form>
	<script type="text/javascript">
	this.document.navform.action='/adm/navmaps#curloc';
	this.document.navform.target='loncapanav';
	this.document.navform.submit();
	</script>
	ENDUPDATE
	}

sub handler {	sub handler {
my $r = shift;	my $r = shift;
real_handler($r);	real_handler($r);
Line 107 sub handler {	Line 152 sub handler {

sub real_handler {	sub real_handler {
my $r = shift;	my $r = shift;
	#my $t0=[&gettimeofday()];
# Handle header-only request	# Handle header-only request
if ($r->header_only) {	if ($r->header_only) {
if ($ENV{'browser.mathml'}) {	if ($env{'browser.mathml'}) {
$r->content_type('text/xml');	&Apache::loncommon::content_type($r,'text/xml');
} else {	} else {
$r->content_type('text/html');	&Apache::loncommon::content_type($r,'text/html');
}	}
$r->send_http_header;	$r->send_http_header;
return OK;	return OK;
}	}

# Send header, don't cache this page	# Send header, don't cache this page
if ($ENV{'browser.mathml'}) {	if ($env{'browser.mathml'}) {
$r->content_type('text/xml');	&Apache::loncommon::content_type($r,'text/xml');
} else {	} else {
$r->content_type('text/html');	&Apache::loncommon::content_type($r,'text/html');
}	}
&Apache::loncommon::no_cache($r);	&Apache::loncommon::no_cache($r);
$r->send_http_header;

# Create the nav map	my %toplinkitems=();
my $navmap = Apache::lonnavmaps::navmap->new(	&add_linkitem(\%toplinkitems,'blank','',"Select Action");
$ENV{"request.course.fn"}.".db",	if ($ENV{QUERY_STRING} eq 'collapseExternal') {
$ENV{"request.course.fn"}."_parms.db", 1, 1);	&Apache::lonnet::put('environment',{'remotenavmap' => 'off'});
	&Apache::lonnet::appenv('environment.remotenavmap' => 'off');
	my $menu=&Apache::lonmenu::reopenmenu();
	my $navstatus=&Apache::lonmenu::get_nav_status();
	if ($menu) {
	$menu=(<<MENU)
	swmenu=$menu
	swmenu.clearTimeout(swmenu.menucltim);
	$navstatus
	MENU
	} else {
	my $nothing = &Apache::lonhtmlcommon::javascript_nothing();
	my $mainwindow='window.open('.$nothing.',"loncapaclient","",false);';
	$menu=(<<MENU)
	swmenu=$mainwindow
	$navstatus
	MENU
	}
	$r->send_http_header;
	my $js =<<"ENDSUBM";
	<script type="text/javascript">
	function submitthis() {
	$menu
	self.close();
	}

	</script>
	ENDSUBM
	$r->print(&Apache::loncommon::start_page(undef,$js,
	{'only_body' => 1,
	'bgcolor' => '#FFFFFF',
	'add_entries' =>
	'onLoad="submitthis()"',}).
	&Apache::loncommon::end_page());

	return OK;
	}
	if ($ENV{QUERY_STRING} =~ /^launchExternal/) {
	&Apache::lonnet::put('environment',{'remotenavmap' => 'on'});
	&Apache::lonnet::appenv('environment.remotenavmap' => 'on');
	my $menu=&Apache::lonmenu::reopenmenu();
	my $navstatus=&Apache::lonmenu::get_nav_status();
	if ($menu) {
	$r->print(<<MENU);
	<script type="text/javascript">
	swmenu=$menu
	swmenu.clearTimeout(swmenu.menucltim);
	$navstatus
	</script>
	MENU
	}
	}
	if ($ENV{QUERY_STRING} eq 'turningOffExternal') {
	$env{'environment.remotenavmap'}='off';
	}

	# Create the nav map
	my $navmap = Apache::lonnavmaps::navmap->new();

if (!defined($navmap)) {	if (!defined($navmap)) {
my $requrl = $r->uri;	my $requrl = $r->uri;
$ENV{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";	$env{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";
return HTTP_NOT_ACCEPTABLE;	return HTTP_NOT_ACCEPTABLE;
}	}
	$r->send_http_header;

$r->print("<html><head>\n");
$r->print("<title>Navigate Course Contents</title>");
# ------------------------------------------------------------ Get query string	# ------------------------------------------------------------ Get query string
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register']);	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register','sort','showOnlyHomework','postsymb']);

# ----------------------------------------------------- Force menu registration	# ----------------------------------------------------- Force menu registration
my $addentries='';	my $addentries='';
if ($ENV{'form.register'}) {	my $more_unload;
$addentries=' onLoad="'.&Apache::lonmenu::loadevents().	my $body_only='';
'" onUnload="'.&Apache::lonmenu::unloadevents().'"';	my $js;
$r->print(&Apache::lonmenu::registerurl(1));	if ($env{'environment.remotenavmap'} eq 'on') {
	$js='<script type="text/javascript">
	function collapse() {
	this.document.location="/adm/navmaps?collapseExternal";
	}
	</script>';
	# FIXME need to be smarter to only catch window close events
	# $more_unload="collapse()"
	$body_only=1;
	}
	if ($env{'form.register'}) {
	$addentries=' onLoad="'.&Apache::lonmenu::loadevents().
	'" onUnload="'.&Apache::lonmenu::unloadevents().';'.
	$more_unload.'"';
	$r->print(&Apache::lonmenu::registerurl(1));
	} else {
	$addentries=' onUnload="'.$more_unload.'"';
}	}

# Header	# Header
$r->print('</head>'.	$r->print(&Apache::loncommon::start_page('Navigate Course Contents',$js,
&Apache::loncommon::bodytag('Navigate Course Contents','',	{'add_entries' => $addentries,
$addentries,'','',$ENV{'form.register'}));	'only_body' => $body_only,
$r->print('<script>window.focus();</script>');	'force_resgister' =>
	$env{'form.register'},}));
$r->rflush();	$r->print('<script type="text/javascript">window.focus();</script>');

# Now that we've displayed some stuff to the user, init the navmap
$navmap->init();

$r->rflush();	$r->rflush();

# Check that it's defined	# Check that it's defined
if (!($navmap->courseMapDefined())) {	if (!($navmap->courseMapDefined())) {
$r->print('<font size="+2" color="red">Coursemap undefined.</font>' .	$r->print(&Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT'));
'</body></html>');	$r->print('<font size="+2" color="red">'.&mt('Coursemap undefined.').
	'</font>' .
	&Apache::loncommon::end_page());
return OK;	return OK;
}	}

# See if there's only one map in the top-level, if we don't	# See if there's only one map in the top-level, if we don't
# already have a filter... if so, automatically display it	# already have a filter... if so, automatically display it
	# (older code; should use retrieveResources)
if ($ENV{QUERY_STRING} !~ /filter/) {	if ($ENV{QUERY_STRING} !~ /filter/) {
my $iterator = $navmap->getIterator(undef, undef, undef, 0);	my $iterator = $navmap->getIterator(undef, undef, undef, 0);
my $depth = 1;	my $curRes;
$iterator->next();
my $curRes = $iterator->next();
my $sequenceCount = 0;	my $sequenceCount = 0;
my $sequenceId;	my $sequenceId;
while ($depth > 0) {	while ($curRes = $iterator->next()) {
if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
if ($curRes == $iterator->END_MAP()) { $depth--; }

if (ref($curRes) && $curRes->is_sequence()) {	if (ref($curRes) && $curRes->is_sequence()) {
$sequenceCount++;	$sequenceCount++;
$sequenceId = $curRes->map_pc();	$sequenceId = $curRes->map_pc();
}	}

$curRes = $iterator->next();
}	}

if ($sequenceCount == 1) {	if ($sequenceCount == 1) {
# The automatic iterator creation in the render call	# The automatic iterator creation in the render call
# will pick this up. We know the condition because	# will pick this up. We know the condition because
# the defined($ENV{'form.filter'}) also ensures this	# the defined($env{'form.filter'}) also ensures this
# is a fresh call.	# is a fresh call.
$ENV{'form.filter'} = "$sequenceId";	$env{'form.filter'} = "$sequenceId";
}	}
}	}

	if ($ENV{QUERY_STRING} eq 'launchExternal') {
	$r->print('
	<form name="returnwin" action="/adm/flip?postdata=navlaunch%3a"
	method="post" target="loncapaclient">
	</form>');
	$r->print('
	<script type="text/javascript">
	this.document.returnwin.submit();
	</script>');
	}

	if ($env{'environment.remotenavmap'} ne 'on') {
	$r->print(&launch_win('link','yes',\%toplinkitems));
	}
	if ($env{'environment.remotenavmap'} eq 'on') {
	&add_linkitem(\%toplinkitems,'closenav','collapse()',
	"Close navigation window");
	}

my $jumpToFirstHomework = 0;	my $jumpToFirstHomework = 0;
# Check to see if the student is jumping to next open, do-able problem	# Check to see if the student is jumping to next open, do-able problem
if ($ENV{QUERY_STRING} eq 'jumpToFirstHomework') {	if ($ENV{QUERY_STRING} =~ /^jumpToFirstHomework/) {
$jumpToFirstHomework = 1;	$jumpToFirstHomework = 1;
# Find the next homework problem that they can do.	# Find the next homework problem that they can do.
my $iterator = $navmap->getIterator(undef, undef, undef, 1);	my $iterator = $navmap->getIterator(undef, undef, undef, 1);
my $depth = 1;	my $curRes;
$iterator->next();
my $curRes = $iterator->next();
my $foundDoableProblem = 0;	my $foundDoableProblem = 0;
my $problemRes;	my $problemRes;

while ($depth > 0 && !$foundDoableProblem) {	while (($curRes = $iterator->next()) && !$foundDoableProblem) {
if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
if ($curRes == $iterator->END_MAP()) { $depth--; }

if (ref($curRes) && $curRes->is_problem()) {	if (ref($curRes) && $curRes->is_problem()) {
my $status = $curRes->status();	my $status = $curRes->status();
if ($curRes->completable()) {	if ($curRes->completable()) {
Line 230 sub real_handler {	Line 352 sub real_handler {
pop @$stack; # last resource in the stack is the problem	pop @$stack; # last resource in the stack is the problem
# itself, which we don't need in the map stack	# itself, which we don't need in the map stack
my @mapPcs = map {$_->map_pc()} @$stack;	my @mapPcs = map {$_->map_pc()} @$stack;
$ENV{'form.filter'} = join(',', @mapPcs);	$env{'form.filter'} = join(',', @mapPcs);

# Mark as both "here" and "jump"	# Mark as both "here" and "jump"
$ENV{'form.postsymb'} = $curRes->symb();	$env{'form.postsymb'} = $curRes->symb();
}	}
}	}
} continue {
$curRes = $iterator->next();
}	}

# If we found no problems, print a note to that effect.	# If we found no problems, print a note to that effect.
Line 245 sub real_handler {	Line 365 sub real_handler {
$r->print("<font size='+2'>All homework assignments have been completed.</font><br /><br />");	$r->print("<font size='+2'>All homework assignments have been completed.</font><br /><br />");
}	}
} else {	} else {
$r->print("<a href='navmaps?jumpToFirstHomework'>" .	&add_linkitem(\%toplinkitems,'firsthomework',
"Go To My First Homework Problem</a>    ");	'location.href="navmaps?jumpToFirstHomework"',
	"Show Me My First Homework Problem");
}	}

my $suppressEmptySequences = 0;	my $suppressEmptySequences = 0;
Line 255 sub real_handler {	Line 376 sub real_handler {

# Display only due homework.	# Display only due homework.
my $showOnlyHomework = 0;	my $showOnlyHomework = 0;
if ($ENV{QUERY_STRING} eq 'showOnlyHomework') {	if ($env{'form.showOnlyHomework'} eq "1") {
$showOnlyHomework = 1;	$showOnlyHomework = 1;
$suppressEmptySequences = 1;	$suppressEmptySequences = 1;
$filterFunc = sub { my $res = shift;	$filterFunc = sub { my $res = shift;
return $res->completable() \|\| $res->is_map();	return $res->completable() \|\| $res->is_map();
};	};
$r->print("<p><font size='+2'>Uncompleted Homework</font></p>");	&add_linkitem(\%toplinkitems,'everything',
$ENV{'form.filter'} = '';	'location.href="navmaps?sort='.$env{'form.sort'}.'"',
$ENV{'form.condition'} = 1;	"Show Everything");
	$r->print("<p><font size='+2'>".&mt("Uncompleted Homework")."</font></p>");
	$env{'form.filter'} = '';
	$env{'form.condition'} = 1;
$resource_no_folder_link = 1;	$resource_no_folder_link = 1;
} else {	} else {
$r->print("<a href='navmaps?showOnlyHomework'>" .	&add_linkitem(\%toplinkitems,'uncompleted',
"Show Only Uncompleted Homework</a>    ");	'location.href="navmaps?sort='.$env{'form.sort'}.
}	'&showOnlyHomework=1"',
	"Show Only Uncompleted Homework");
	}

	my %selected=($env{'form.sort'} => 'selected=on');
	my $sort_html=("<form>
	<nobr>
	<input type=\"hidden\" name=\"showOnlyHomework\" value=\"".$env{'form.showOnlyHomework'}."\" />
	<input type=\"submit\" value=\"".&mt('Sort by:')."\" />
	<select name=\"sort\">
	<option value=\"default\" $selected{'default'}>".&mt('Default')."</option>
	<option value=\"title\" $selected{'title'} >".&mt('Title')."</option>
	<option value=\"duedate\" $selected{'duedate'}>".&mt('Duedate')."</option>
	<option value=\"discussion\" $selected{'discussion'}>".&mt('Has New Discussion')."</option>
	</select>
	</nobr>
	</form>");
# renderer call	# renderer call
my $renderArgs = { 'cols' => [0,1,2,3],	my $renderArgs = { 'cols' => [0,1,2,3],
	'sort' => $env{'form.sort'},
'url' => '/adm/navmaps',	'url' => '/adm/navmaps',
'navmap' => $navmap,	'navmap' => $navmap,
'suppressNavmap' => 1,	'suppressNavmap' => 1,
'suppressEmptySequences' => $suppressEmptySequences,	'suppressEmptySequences' => $suppressEmptySequences,
'filterFunc' => $filterFunc,	'filterFunc' => $filterFunc,
'resource_no_folder_link' => $resource_no_folder_link,	'resource_no_folder_link' => $resource_no_folder_link,
'r' => $r};	'sort_html'=> $sort_html,
	'r' => $r,
	'caller' => 'navmapsdisplay',
	'linkitems' => \%toplinkitems};
my $render = render($renderArgs);	my $render = render($renderArgs);
$navmap->untieHashes();

# If no resources were printed, print a reassuring message so the	# If no resources were printed, print a reassuring message so the
# user knows there was no error.	# user knows there was no error.
if ($renderArgs->{'counter'} == 0) {	if ($renderArgs->{'counter'} == 0) {
if ($showOnlyHomework) {	if ($showOnlyHomework) {
$r->print("<p><font size='+1'>All homework is currently completed.</font></p>");	$r->print("<p><font size='+1'>".&mt("All homework is currently completed").".</font></p>");
} else { # both jumpToFirstHomework and normal use the same: course must be empty	} else { # both jumpToFirstHomework and normal use the same: course must be empty
$r->print("<p><font size='+1'>This course is empty.</font></p>");	$r->print("<p><font size='+1'>This course is empty.</font></p>");
}	}
}	}
	#my $td=&tv_interval($t0);
	#$r->print("<br />$td");

$r->print("</body></html>");	$r->print(&Apache::loncommon::end_page());
$r->rflush();	$r->rflush();

return OK;	return OK;
Line 321 sub removeFromFilter {	Line 465 sub removeFromFilter {

# Convenience function: Given a stack returned from getStack on the iterator,	# Convenience function: Given a stack returned from getStack on the iterator,
# return the correct src() value.	# return the correct src() value.
# Later, this should add an anchor when we start putting anchors in pages.
sub getLinkForResource {	sub getLinkForResource {
my $stack = shift;	my $stack = shift;
my $res;	my $res;

# Check to see if there are any pages in the stack	# Check to see if there are any pages in the stack
foreach $res (@$stack) {	foreach $res (@$stack) {
if (defined($res) && $res->is_page()) {	if (defined($res)) {
return $res->src();	my $anchor;
	if ($res->is_page()) {
	foreach (@$stack) { if (defined($_)) { $anchor = $_; } }
	$anchor=&Apache::lonnet::escape($anchor->shown_symb());
	return ($res->link(),$res->shown_symb(),$anchor);
	}
	# in case folder was skipped over as "only sequence"
	my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
	if ($map=~/\.page$/) {
	my $url=&Apache::lonnet::clutter($map);
	$anchor=&Apache::lonnet::escape($src->shown_symb());
	return ($url,$res->shown_symb(),$anchor);
	}
}	}
}	}

Line 341 sub getLinkForResource {	Line 496 sub getLinkForResource {
if (defined($_)) { $res = $_; }	if (defined($_)) { $res = $_; }
}	}

return $res->src();	return ($res->link(),$res->shown_symb());
}	}

# Convenience function: This seperates the logic of how to create	# Convenience function: This separates the logic of how to create
# the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",	# the problem text strings ("Due: DATE", "Open: DATE", "Not yet assigned",
# etc.) into a seperate function. It takes a resource object as the	# etc.) into a separate function. It takes a resource object as the
# first parameter, and the part number of the resource as the second.	# first parameter, and the part number of the resource as the second.
# It's basically a big switch statement on the status of the resource.	# It's basically a big switch statement on the status of the resource.

Line 356 sub getDescription {	Line 511 sub getDescription {
my $status = $res->status($part);	my $status = $res->status($part);

if ($status == $res->NETWORK_FAILURE) {	if ($status == $res->NETWORK_FAILURE) {
return "Having technical difficulties; please check status later";	return &mt("Having technical difficulties; please check status later");
}	}
if ($status == $res->NOTHING_SET) {	if ($status == $res->NOTHING_SET) {
return "Not currently assigned.";	return &mt("Not currently assigned.");
}	}
if ($status == $res->OPEN_LATER) {	if ($status == $res->OPEN_LATER) {
return "Open " . timeToHumanString($res->opendate($part));	return "Open " . timeToHumanString($res->opendate($part),'start');
}	}
if ($status == $res->OPEN) {	if ($status == $res->OPEN) {
if ($res->duedate($part)) {	if ($res->duedate($part)) {
return "Due " . timeToHumanString($res->duedate($part));	return &mt("Due")." " .timeToHumanString($res->duedate($part),'end');
} else {	} else {
return "Open, no due date";	return &mt("Open, no due date");
}	}
}	}
if ($status == $res->PAST_DUE_ANSWER_LATER) {	if ($status == $res->PAST_DUE_ANSWER_LATER) {
return "Answer open " . timeToHumanString($res->answerdate($part));	return &mt("Answer open")." " . timeToHumanString($res->answerdate($part),'start');
}	}
if ($status == $res->PAST_DUE_NO_ANSWER) {	if ($status == $res->PAST_DUE_NO_ANSWER) {
return "Was due " . timeToHumanString($res->duedate($part));	return &mt("Was due")." " . timeToHumanString($res->duedate($part),'end');
}	}
if ($status == $res->ANSWER_OPEN) {	if (($status == $res->ANSWER_OPEN \|\| $status == $res->PARTIALLY_CORRECT)
return "Answer available";	&& $res->handgrade($part) ne 'yes') {
	return &mt("Answer available");
}	}
if ($status == $res->EXCUSED) {	if ($status == $res->EXCUSED) {
return "Excused by instructor";	return &mt("Excused by instructor");
}	}
if ($status == $res->ATTEMPTED) {	if ($status == $res->ATTEMPTED) {
return "Answer submitted, not yet graded.";	return &mt("Answer submitted, not yet graded");
}	}
if ($status == $res->TRIES_LEFT) {	if ($status == $res->TRIES_LEFT) {
my $tries = $res->tries($part);	my $tries = $res->tries($part);
Line 396 sub getDescription {	Line 552 sub getDescription {
$triesString = "<b>$triesString</b>";	$triesString = "<b>$triesString</b>";
}	}
}	}
if ($res->duedate()) {	if ($res->duedate($part)) {
return "Due " . timeToHumanString($res->duedate($part)) .	return &mt("Due")." " . timeToHumanString($res->duedate($part),'end') .
" $triesString";	" $triesString";
} else {	} else {
return "No due date $triesString";	return &mt("No due date")." $triesString";
}	}
}	}
if ($status == $res->ANSWER_SUBMITTED) {	if ($status == $res->ANSWER_SUBMITTED) {
return 'Answer submitted';	return &mt('Answer submitted');
}	}
}	}

# Convenience function, so others can use it: Is the problem due in less then	# Convenience function, so others can use it: Is the problem due in less then
# 24 hours, and still can be done?	# 24 hours, and still can be done?

sub dueInLessThen24Hours {	sub dueInLessThan24Hours {
my $res = shift;	my $res = shift;
my $part = shift;	my $part = shift;
my $status = $res->status($part);	my $status = $res->status($part);

return ($status == $res->OPEN() \|\|	return ($status == $res->OPEN() \|\|
$status == $res->TRIES_LEFT()) &&	$status == $res->TRIES_LEFT()) &&
$res->duedate() && $res->duedate() < time()+(246060) &&	$res->duedate($part) && $res->duedate($part) < time()+(246060) &&
$res->duedate() > time();	$res->duedate($part) > time();
}	}

# Convenience function, so others can use it: Is there only one try remaining for the	# Convenience function, so others can use it: Is there only one try remaining for the
Line 431 sub lastTry {	Line 587 sub lastTry {
my $tries = $res->tries($part);	my $tries = $res->tries($part);
my $maxtries = $res->maxtries($part);	my $maxtries = $res->maxtries($part);
return $tries && $maxtries && $maxtries > 1 &&	return $tries && $maxtries && $maxtries > 1 &&
$maxtries - $tries == 1 && $res->duedate() &&	$maxtries - $tries == 1 && $res->duedate($part) &&
$res->duedate() > time();	$res->duedate($part) > time();
}	}

# This puts a human-readable name on the ENV variable.	# This puts a human-readable name on the env variable.

sub advancedUser {	sub advancedUser {
return $ENV{'request.role.adv'};	return $env{'request.role.adv'};
}	}


Line 450 sub advancedUser {	Line 606 sub advancedUser {
# print "Answer available $timestring"	# print "Answer available $timestring"
# Very, very, very, VERY English-only... goodness help a localizer on	# Very, very, very, VERY English-only... goodness help a localizer on
# this func...	# this func...


sub timeToHumanString {	sub timeToHumanString {
my ($time) = @_;	my ($time,$type,$format) = @_;

# zero, '0' and blank are bad times	# zero, '0' and blank are bad times
if (!$time) {	if (!$time) {
return 'never';	return &mt('never');
}	}
	unless (&Apache::lonlocal::current_language()=~/^en/) {
	return &Apache::lonlocal::locallocaltime($time);
	}
my $now = time();	my $now = time();

my @time = localtime($time);	my @time = localtime($time);
Line 520 sub timeToHumanString {	Line 681 sub timeToHumanString {
return "$prefix$hourString$minuteString$tense";	return "$prefix$hourString$minuteString$tense";
}	}

	# If there's a caller supplied format, use it.

	if($format ne '') {
	my $timeStr = strftime($format, localtime($time));
	return $timeStr.&Apache::lonlocal::gettimezone();
	}

# Less then 5 days away, display day of the week and	# Less then 5 days away, display day of the week and
# HH:MM	# HH:MM

if ( $delta < $day * 5 ) {	if ( $delta < $day * 5 ) {
my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));	my $timeStr = strftime("%A, %b %e at %I:%M %P", localtime($time));
$timeStr =~ s/12:00 am/midnight/;	$timeStr =~ s/12:00 am/00:00/;
$timeStr =~ s/12:00 pm/noon/;	$timeStr =~ s/12:00 pm/noon/;
return ($inPast ? "last " : "next ") .	return ($inPast ? "last " : "this ") .
$timeStr;	$timeStr.&Apache::lonlocal::gettimezone();
}	}

	my $conjunction='on';
	if ($type eq 'start') {
	$conjunction='at';
	} elsif ($type eq 'end') {
	$conjunction='by';
	}
# Is it this year?	# Is it this year?
if ( $time[5] == $now[5]) {	if ( $time[5] == $now[5]) {
# Return on Month Day, HH:MM meridian	# Return on Month Day, HH:MM meridian
my $timeStr = strftime("on %A, %b %e at %I:%M %P", localtime($time));	my $timeStr = strftime("$conjunction %A, %b %e at %I:%M %P", localtime($time));
$timeStr =~ s/12:00 am/midnight/;	$timeStr =~ s/12:00 am/00:00/;
$timeStr =~ s/12:00 pm/noon/;	$timeStr =~ s/12:00 pm/noon/;
return $timeStr;	return $timeStr.&Apache::lonlocal::gettimezone();
}	}

# Not this year, so show the year	# Not this year, so show the year
my $timeStr = strftime("on %A, %b %e %G at %I:%M %P", localtime($time));	my $timeStr = strftime("$conjunction %A, %b %e %Y at %I:%M %P", localtime($time));
$timeStr =~ s/12:00 am/midnight/;	$timeStr =~ s/12:00 am/00:00/;
$timeStr =~ s/12:00 pm/noon/;	$timeStr =~ s/12:00 pm/noon/;
return $timeStr;	return $timeStr.&Apache::lonlocal::gettimezone();
}	}
}	}

Line 552 sub timeToHumanString {	Line 727 sub timeToHumanString {

=head1 NAME	=head1 NAME

Apache::lonnavmap - Subroutines to handle and render the navigation maps	Apache::lonnavmap - Subroutines to handle and render the navigation
	maps

=head1 SYNOPSIS	=head1 SYNOPSIS

Line 560 The main handler generates the navigatio	Line 736 The main handler generates the navigatio
the other objects export this information in a usable fashion for	the other objects export this information in a usable fashion for
other modules.	other modules.

	=head1 OVERVIEW

	X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
	course structure and caches it in what is often referred to as the
	"big hash" X<big hash>. You can see it if you are logged into
	LON-CAPA, in a course, by going to /adm/test. (You may need to
	tweak the /home/httpd/lonTabs/htpasswd file to view it.) The
	content of the hash will be under the heading "Big Hash".

	Big Hash contains, among other things, how resources are related
	to each other (next/previous), what resources are maps, which
	resources are being chosen to not show to the student (for random
	selection), and a lot of other things that can take a lot of time
	to compute due to the amount of data that needs to be collected and
	processed.

	Apache::lonnavmaps provides an object model for manipulating this
	information in a higher-level fashion then directly manipulating
	the hash. It also provides access to several auxilary functions
	that aren't necessarily stored in the Big Hash, but are a per-
	resource sort of value, like whether there is any feedback on
	a given resource.

	Apache::lonnavmaps also abstracts away branching, and someday,
	conditions, for the times where you don't really care about those
	things.

	Apache::lonnavmaps also provides fairly powerful routines for
	rendering navmaps, and last but not least, provides the navmaps
	view for when the user clicks the NAV button.

	B<Note>: Apache::lonnavmaps I<only> works for the "currently
	logged in user"; if you want things like "due dates for another
	student" lonnavmaps can not directly retrieve information like
	that. You need the EXT function. This module can still help,
	because many things, such as the course structure, are constant
	between users, and Apache::lonnavmaps can help by providing
	symbs for the EXT call.

	The rest of this file will cover the provided rendering routines,
	which can often be used without fiddling with the navmap object at
	all, then documents the Apache::lonnavmaps::navmap object, which
	is the key to accessing the Big Hash information, covers the use
	of the Iterator (which provides the logic for traversing the
	somewhat-complicated Big Hash data structure), documents the
	Apache::lonnavmaps::Resource objects that are returned by

=head1 Subroutine: render	=head1 Subroutine: render

The navmap renderer package provides a sophisticated rendering of the	The navmap renderer package provides a sophisticated rendering of the
standard navigation maps interface into HTML. The provided nav map	standard navigation maps interface into HTML. The provided nav map
handler is actually just a glorified call to this.	handler is actually just a glorified call to this.

Because of the large number of parameters this function presents,	Because of the large number of parameters this function accepts,
instead of passing it arguments as is normal, pass it in an anonymous	instead of passing it arguments as is normal, pass it in an anonymous
hash with the given options. This is because there is no obvious order	hash with the desired options.
you may wish to override these in and a hash is easier to read and
understand then "undef, undef, undef, 1, undef, undef, renderButton,
undef, 0" when you mostly want default behaviors.

The package provides a function called 'render', called as	The package provides a function called 'render', called as
Apache::lonnavmaps::render({}).	Apache::lonnavmaps::render({}).
Line 599 that takes a resource reference, a part	Line 819 that takes a resource reference, a part
argument hash passed to the renderer, and returns a string that will	argument hash passed to the renderer, and returns a string that will
be inserted into the HTML representation as it.	be inserted into the HTML representation as it.

	All other parameters are ways of either changing how the columns
	are printing, or which rows are shown.

The pre-packaged column names are refered to by constants in the	The pre-packaged column names are refered to by constants in the
Apache::lonnavmaps namespace. The following currently exist:	Apache::lonnavmaps namespace. The following currently exist:

=over 4	=over 4

=item * B<resource>:	=item * B<Apache::lonnavmaps::resource>:

The general info about the resource: Link, icon for the type, etc. The	The general info about the resource: Link, icon for the type, etc. The
first column in the standard nav map display. This column also accepts	first column in the standard nav map display. This column provides the
	indentation effect seen in the B<NAV> screen. This column also accepts
the following parameters in the renderer hash:	the following parameters in the renderer hash:

=over 4	=over 4

=item * B<resource_nolink>:	=item * B<resource_nolink>: default false

If true, the resource will not be linked. Default: false, resource	If true, the resource will not be linked. By default, all non-folder
will have links.	resources are linked.

=item * B<resource_part_count>:	=item * B<resource_part_count>: default true

If true (default), the resource will show a part count if the full	If true, the resource will show a part count B<if> the full
part list is not displayed. If false, the resource will never show a	part list is not displayed. (See "condense_parts" later.) If false,
part count.	the resource will never show a part count.

=item * B<resource_no_folder_link>:	=item * B<resource_no_folder_link>:

Line 631 can't close or open folders when this is	Line 855 can't close or open folders when this is

=back	=back

=item B<communication_status>:	=item * B<Apache::lonnavmaps::communication_status>:

Whether there is discussion on the resource, email for the user, or	Whether there is discussion on the resource, email for the user, or
(lumped in here) perl errors in the execution of the problem. This is	(lumped in here) perl errors in the execution of the problem. This is
the second column in the main nav map.	the second column in the main nav map.

=item B<quick_status>:	=item * B<Apache::lonnavmaps::quick_status>:

An icon for the status of a problem, with four possible states:	An icon for the status of a problem, with five possible states:
Correct, incorrect, open, or none (not open yet, not a problem). The	Correct, incorrect, open, awaiting grading (for a problem where the
	computer's grade is suppressed, or the computer can't grade, like
	essay problem), or none (not open yet, not a problem). The
third column of the standard navmap.	third column of the standard navmap.

=item B<long_status>:	=item * B<Apache::lonnavmaps::long_status>:

A text readout of the details of the current status of the problem,	A text readout of the details of the current status of the problem,
such as "Due in 22 hours". The fourth column of the standard navmap.	such as "Due in 22 hours". The fourth column of the standard navmap.

	=item * B<Apache::lonnavmaps::part_status_summary>:

	A text readout summarizing the status of the problem. If it is a
	single part problem, will display "Correct", "Incorrect",
	"Not yet open", "Open", "Attempted", or "Error". If there are
	multiple parts, this will output a string that in HTML will show a
	status of how many parts are in each status, in color coding, trying
	to match the colors of the icons within reason.

	Note this only makes sense if you are I<not> showing parts. If
	C<showParts> is true (see below), this column will not output
	anything.

=back	=back

If you add any others please be sure to document them here.	If you add any others please be sure to document them here.
Line 666 to override vertical and horizontal alig	Line 905 to override vertical and horizontal alig

=head2 Parameters	=head2 Parameters

Most of these parameters are only useful if you are not using the	Minimally, you should be
folder interface (i.e., the default first column), which is probably
the common case. If you are using this interface, then you should be
able to get away with just using 'cols' (to specify the columns	able to get away with just using 'cols' (to specify the columns
shown), 'url' (necessary for the folders to link to the current screen	shown), 'url' (necessary for the folders to link to the current screen
correctly), and possibly 'queryString' if your app calls for it. In	correctly), and possibly 'queryString' if your app calls for it. In
Line 677 automatically.	Line 914 automatically.

=over 4	=over 4

=item * B<iterator>:	=item * B<iterator>: default: constructs one from %env

A reference to a fresh ::iterator to use from the navmaps. The	A reference to a fresh ::iterator to use from the navmaps. The
rendering will reflect the options passed to the iterator, so you can	rendering will reflect the options passed to the iterator, so you can
use that to just render a certain part of the course, if you like. If	use that to just render a certain part of the course, if you like. If
one is not passed, the renderer will attempt to construct one from	one is not passed, the renderer will attempt to construct one from
ENV{'form.filter'} and ENV{'form.condition'} information, plus the	env{'form.filter'} and env{'form.condition'} information, plus the
'iterator_map' parameter if any.	'iterator_map' parameter if any.

=item * B<iterator_map>:	=item * B<iterator_map>: default: not used

If you are letting the renderer do the iterator handling, you can	If you are letting the renderer do the iterator handling, you can
instruct the renderer to render only a particular map by passing it	instruct the renderer to render only a particular map by passing it
the source of the map you want to process, like	the source of the map you want to process, like
'/res/103/jerf/navmap.course.sequence'.	'/res/103/jerf/navmap.course.sequence'.

=item * B<navmap>:	=item * B<navmap>: default: constructs one from %env

A reference to a navmap, used only if an iterator is not passed in. If	A reference to a navmap, used only if an iterator is not passed in. If
this is necessary to make an iterator but it is not passed in, a new	this is necessary to make an iterator but it is not passed in, a new
one will be constructed based on ENV info. This is useful to do basic	one will be constructed based on env info. This is useful to do basic
error checking before passing it off to render.	error checking before passing it off to render.

=item * B<r>:	=item * B<r>: default: must be passed in

The standard Apache response object. This must be passed to the	The standard Apache response object. This must be passed to the
renderer or the course hash will be locked.	renderer or the course hash will be locked.

=item * B<cols>:	=item * B<cols>: default: empty (useless)

An array reference	An array reference

=item * B<showParts>:	=item * B<showParts>:default true

A flag. If yes (default), a line for the resource itself, and a line	A flag. If true, a line for the resource itself, and a line
for each part will be displayed. If not, only one line for each	for each part will be displayed. If not, only one line for each
resource will be displayed.	resource will be displayed.

=item * B<condenseParts>:	=item * B<condenseParts>: default true

A flag. If yes (default), if all parts of the problem have the same	A flag. If true, if all parts of the problem have the same
status and that status is Nothing Set, Correct, or Network Failure,	status and that status is Nothing Set, Correct, or Network Failure,
then only one line will be displayed for that resource anyhow. If no,	then only one line will be displayed for that resource anyhow. If no,
all parts will always be displayed. If showParts is 0, this is	all parts will always be displayed. If showParts is 0, this is
ignored.	ignored.

=item * B<jumpCount>:	=item * B<jumpCount>: default: determined from %env

A string identifying the URL to place the anchor 'curloc' at. Default	A string identifying the URL to place the anchor 'curloc' at.
to no anchor at all. It is the responsibility of the renderer user to	It is the responsibility of the renderer user to
ensure that the #curloc is in the URL. By default, determined through	ensure that the #curloc is in the URL. By default, determined through
the use of the ENV{} 'jump' information, and should normally "just	the use of the env{} 'jump' information, and should normally "just
work" correctly.	work" correctly.

=item * B<here>:	=item * B<here>: default: empty string

A Symb identifying where to place the 'here' marker. Default empty,	A Symb identifying where to place the 'here' marker. The empty
which means no marker.	string means no marker.

=item * B<indentString>:	=item * B<indentString>: default: 25 pixel whitespace image

A string identifying the indentation string to use. By default, this	A string identifying the indentation string to use.
is a 25 pixel whitespace image with no alt text.

=item * B<queryString>:	=item * B<queryString>: default: empty

A string which will be prepended to the query string used when the	A string which will be prepended to the query string used when the
folders are opened or closed.	folders are opened or closed. You can use this to pass
	application-specific values.

=item * B<url>:	=item * B<url>: default: none

The url the folders will link to, which should be the current	The url the folders will link to, which should be the current
page. Required if the resource info column is shown.	page. Required if the resource info column is shown, and you
	are allowing the user to open and close folders.

=item * B<currentJumpIndex>:	=item * B<currentJumpIndex>: default: no jumping

Describes the currently-open row number to cause the browser to jump	Describes the currently-open row number to cause the browser to jump
to, because the user just opened that folder. By default, pulled from	to, because the user just opened that folder. By default, pulled from
the Jump information in the ENV{'form.*'}.	the Jump information in the env{'form.*'}.

=item * B<printKey>:	=item * B<printKey>: default: false

If true, print the key that appears on the top of the standard	If true, print the key that appears on the top of the standard
navmaps. Default is false.	navmaps.

=item * B<printCloseAll>:	=item * B<printCloseAll>: default: true

If true, print the "Close all folders" or "open all folders"	If true, print the "Close all folders" or "open all folders"
links. Default is true.	links.

=item * B<filterFunc>:	=item * B<filterFunc>: default: sub {return 1;} (accept everything)

A function that takes the resource object as its only parameter and	A function that takes the resource object as its only parameter and
returns a true or false value. If true, the resource is displayed. If	returns a true or false value. If true, the resource is displayed. If
false, it is simply skipped in the display. By default, all resources	false, it is simply skipped in the display.
are shown.

=item * B<suppressEmptySequences>:	=item * B<suppressEmptySequences>: default: false

If you're using a filter function, and displaying sequences to orient	If you're using a filter function, and displaying sequences to orient
the user, then frequently some sequences will be empty. Setting this to	the user, then frequently some sequences will be empty. Setting this to
true will cause those sequences not to display, so as not to confuse the	true will cause those sequences not to display, so as not to confuse the
user into thinking that if the sequence is there there should be things	user into thinking that if the sequence is there there should be things
under it.	under it; for example, see the "Show Uncompleted Homework" view on the
	B<NAV> screen.

=item * B<suppressNavmaps>:	=item * B<suppressNavmaps>: default: false

If true, will not display Navigate Content resources. Default to	If true, will not display Navigate Content resources.
false.

=back	=back

Line 796 be passed through unchange to the column	Line 1033 be passed through unchange to the column
generate the following information which your renderer may find	generate the following information which your renderer may find
useful:	useful:

If you want to know how many rows were printed, the 'counter' element
of the hash passed into the render function will contain the
count. You may want to check whether any resources were printed at
all.

=over 4	=over 4

	=item * B<counter>:

	Contains the number of rows printed. Useful after calling the render
	function, as you can detect whether anything was printed at all.

	=item * B<isNewBranch>:

	Useful for renderers: If this resource is currently the first resource
	of a new branch, this will be true. The Resource column (leftmost in the
	navmaps screen) uses this to display the "new branch" icon

=back	=back

=cut	=cut
Line 811 sub resource { return 0; }	Line 1054 sub resource { return 0; }
sub communication_status { return 1; }	sub communication_status { return 1; }
sub quick_status { return 2; }	sub quick_status { return 2; }
sub long_status { return 3; }	sub long_status { return 3; }
	sub part_status_summary { return 4; }
# Data for render_resource

sub render_resource {	sub render_resource {
my ($resource, $part, $params) = @_;	my ($resource, $part, $params) = @_;
Line 820 sub render_resource {	Line 1062 sub render_resource {
my $nonLinkedText = ''; # stuff after resource title not in link	my $nonLinkedText = ''; # stuff after resource title not in link

my $link = $params->{"resourceLink"};	my $link = $params->{"resourceLink"};

	# The URL part is not escaped at this point, but the symb is...
	# The stuff to the left of the ? must have ' replaced by \' since
	# it will be quoted with ' in the href.

	my ($left,$right) = split(/\?/, $link);
	$link = $left.'?'.$right;

my $src = $resource->src();	my $src = $resource->src();
my $it = $params->{"iterator"};	my $it = $params->{"iterator"};
my $filter = $it->{FILTER};	my $filter = $it->{FILTER};

my $title = $resource->compTitle();	my $title = $resource->compTitle();
if ($src =~ /^\/uploaded\//) {
$nonLinkedText=$title;
$title = '';
}
my $partLabel = "";	my $partLabel = "";
my $newBranchText = "";	my $newBranchText = "";
	my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
# If this is a new branch, label it so	# If this is a new branch, label it so
if ($params->{'isNewBranch'}) {	if ($params->{'isNewBranch'}) {
$newBranchText = "<img src='/adm/lonIcons/branch.gif' border='0' />";	$newBranchText = "<img src='$location/branch.gif' border='0' alt='Branch' />";
}	}

# links to open and close the folder	# links to open and close the folder
my $linkopen = "<a href='$link'>";

	my $linkopen = "<a href=\"$link\">";


my $linkclose = "</a>";	my $linkclose = "</a>";

# Default icon: unknown page	# Default icon: unknown page
my $icon = "<img src='/adm/lonIcons/unknown.gif' alt='' border='0' />";	my $icon = "<img src='$location/unknown.gif' alt='' border='0' alt='  ' ' />";

if ($resource->is_problem()) {	if ($resource->is_problem()) {
if ($part eq '0' \|\| $params->{'condensed'}) {	if ($part eq '0' \|\| $params->{'condensed'}) {
$icon = '<img src="/adm/lonIcons/problem.gif" alt="" border="0" />';	$icon ='<img src="'.$location.'/problem.gif" alt="'.&mt('Problem').'" border="0" />';
} else {	} else {
$icon = $params->{'indentString'};	$icon = $params->{'indentString'};
}	}
} else {	} else {
my $curfext= (split (/\./,$resource->src))[-1];	$icon = "<img src='".&Apache::loncommon::icon($resource->src)."' alt='  ' border='0' />";
my $embstyle = &Apache::loncommon::fileembstyle($curfext);
# The unless conditional that follows is a bit of overkill
if (!(!defined($embstyle) \|\| $embstyle eq 'unk' \|\| $embstyle eq 'hdn')) {
$icon = "<img src='/adm/lonIcons/$curfext.gif' alt='' border='0' />";
}
}	}

# Display the correct map icon to open or shut map	# Display the correct map icon to open or shut map
Line 868 sub render_resource {	Line 1114 sub render_resource {
}	}

my $folderType = $resource->is_sequence() ? 'folder' : 'page';	my $folderType = $resource->is_sequence() ? 'folder' : 'page';
	my $title=$resource->title;
	$title=~s/\"/\"/g;
if (!$params->{'resource_no_folder_link'}) {	if (!$params->{'resource_no_folder_link'}) {
$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';	$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') . '.gif';
$icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";	$icon = "<img src='$location/$icon' alt=\"".
	($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";

$linkopen = "<a href='" . $params->{'url'} . '?' .	$linkopen = "<a href=\"" . $params->{'url'} . '?' .
$params->{'queryString'} . '&filter=';	$params->{'queryString'} . '&filter=';
$linkopen .= ($nowOpen xor $it->{CONDITION}) ?	$linkopen .= ($nowOpen xor $it->{CONDITION}) ?
addToFilter($filter, $mapId) :	addToFilter($filter, $mapId) :
Line 883 sub render_resource {	Line 1131 sub render_resource {
&Apache::lonnet::escape($params->{'here'}) .	&Apache::lonnet::escape($params->{'here'}) .
'&jump=' .	'&jump=' .
&Apache::lonnet::escape($resource->symb()) .	&Apache::lonnet::escape($resource->symb()) .
"&folderManip=1'>";	"&folderManip=1\">";

} else {	} else {
# Don't allow users to manipulate folder	# Don't allow users to manipulate folder
$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .	$icon = "navmap.$folderType." . ($nowOpen ? 'closed' : 'open') .
'.nomanip.gif';	'.nomanip.gif';
$icon = "<img src='/adm/lonIcons/$icon' alt='' border='0' />";	$icon = "<img src='$location/$icon' alt=\"".
	($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";

$linkopen = "";	$linkopen = "";
$linkclose = "";	$linkclose = "";
Line 896 sub render_resource {	Line 1146 sub render_resource {
}	}

if ($resource->randomout()) {	if ($resource->randomout()) {
$nonLinkedText .= ' <i>(hidden)</i> ';	$nonLinkedText .= ' <i>('.&mt('hidden').')</i> ';
	}
	if (!$resource->condval()) {
	$nonLinkedText .= ' <i>('.&mt('conditionally hidden').')</i> ';
}	}

# We're done preparing and finally ready to start the rendering	# We're done preparing and finally ready to start the rendering
Line 911 sub render_resource {	Line 1164 sub render_resource {
}	}

# Decide what to display	# Decide what to display

$result .= "$newBranchText$linkopen$icon$linkclose";	$result .= "$newBranchText$linkopen$icon$linkclose";

my $curMarkerBegin = '';	my $curMarkerBegin = '';
Line 919 sub render_resource {	Line 1173 sub render_resource {
# Is this the current resource?	# Is this the current resource?
if (!$params->{'displayedHereMarker'} &&	if (!$params->{'displayedHereMarker'} &&
$resource->symb() eq $params->{'here'} ) {	$resource->symb() eq $params->{'here'} ) {
$curMarkerBegin = '<font color="red" size="+2">> </font>';	$curMarkerBegin = '<font color="red" size="+2">></font>';
$curMarkerEnd = '<font color="red" size="+2"><</font>';	$curMarkerEnd = '<font color="red" size="+2"><</font>';
$params->{'displayedHereMarker'} = 1;	$params->{'displayedHereMarker'} = 1;
}	}

if ($resource->is_problem() && $part ne '0' &&	if ($resource->is_problem() && $part ne '0' &&
!$params->{'condensed'}) {	!$params->{'condensed'}) {
$partLabel = " (Part $part)";	my $displaypart=$resource->part_display($part);
	$partLabel = " (".&mt('Part: [_1]', $displaypart).")";
	if ($link!~/\#/) { $link.='#'.&Apache::lonnet::escape($part); }
$title = "";	$title = "";
}	}

if ($params->{'condensed'} && $resource->countParts() > 1) {	if ($params->{'condensed'} && $resource->countParts() > 1) {
$nonLinkedText .= ' (' . $resource->countParts() . ' parts)';	$nonLinkedText .= ' ('.&mt('[_1] parts', $resource->countParts()).')';
}	}

if (!$params->{'resource_nolink'} && $src !~ /^\/uploaded\// &&	my $target;
!$resource->is_sequence()) {	if ($env{'environment.remotenavmap'} eq 'on') {
$result .= " $curMarkerBegin<a href='$link'>$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";	$target=' target="loncapaclient" ';
	}
	if (!$params->{'resource_nolink'} && !$resource->is_sequence() && !$resource->is_empty_sequence) {
	$result .= " $curMarkerBegin<a $target href=\"$link\">$title$partLabel</a>$curMarkerEnd $nonLinkedText</td>";
} else {	} else {
$result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";	$result .= " $curMarkerBegin$title$partLabel$curMarkerEnd $nonLinkedText</td>";
}	}
Line 949 sub render_communication_status {	Line 1208 sub render_communication_status {
my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";	my $discussionHTML = ""; my $feedbackHTML = ""; my $errorHTML = "";

my $link = $params->{"resourceLink"};	my $link = $params->{"resourceLink"};
my $linkopen = "<a href='$link'>";	my $target;
	if ($env{'environment.remotenavmap'} eq 'on') {
	$target=' target="loncapaclient" ';
	}
	my $linkopen = "<a $target href=\"$link\">";
my $linkclose = "</a>";	my $linkclose = "</a>";
	my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
if ($resource->hasDiscussion()) {	if ($resource->hasDiscussion()) {
$discussionHTML = $linkopen .	$discussionHTML = $linkopen .
'<img border="0" src="/adm/lonMisc/chat.gif" />' .	'<img border="0" src="'.$location.'/chat.gif" />' .
$linkclose;	$linkclose;
}	}

Line 962 sub render_communication_status {	Line 1225 sub render_communication_status {
my $feedback = $resource->getFeedback();	my $feedback = $resource->getFeedback();
foreach (split(/\,/, $feedback)) {	foreach (split(/\,/, $feedback)) {
if ($_) {	if ($_) {
$feedbackHTML .= ' <a href="/adm/email?display='	$feedbackHTML .= ' <a '.$target.' href="/adm/email?display='
. &Apache::lonnet::escape($_) . '">'	. &Apache::lonnet::escape($_) . '">'
. '<img src="/adm/lonMisc/feedback.gif" '	. '<img src="'.$location.'/feedback.gif" '
. 'border="0" /></a>';	. 'border="0" /></a>';
}	}
}	}
Line 972 sub render_communication_status {	Line 1235 sub render_communication_status {

if ($resource->getErrors()) {	if ($resource->getErrors()) {
my $errors = $resource->getErrors();	my $errors = $resource->getErrors();
	my $errorcount = 0;
foreach (split(/,/, $errors)) {	foreach (split(/,/, $errors)) {
	last if ($errorcount>=10); # Only output 10 bombs maximum
if ($_) {	if ($_) {
$errorHTML .= ' <a href="/adm/email?display='	$errorcount++;
	$errorHTML .= ' <a '.$target.' href="/adm/email?display='
. &Apache::lonnet::escape($_) . '">'	. &Apache::lonnet::escape($_) . '">'
. '<img src="/adm/lonMisc/bomb.gif" '	. '<img src="'.$location.'/bomb.gif" '
. 'border="0" /></a>';	. 'border="0" /></a>';
}	}
}	}
Line 996 sub render_quick_status {	Line 1262 sub render_quick_status {
$params->{'multipart'} && $part eq "0";	$params->{'multipart'} && $part eq "0";

my $link = $params->{"resourceLink"};	my $link = $params->{"resourceLink"};
my $linkopen = "<a href='$link'>";	my $target;
	if ($env{'environment.remotenavmap'} eq 'on') {
	$target=' target="loncapaclient" ';
	}
	my $linkopen = "<a $target href=\"$link\">";
my $linkclose = "</a>";	my $linkclose = "</a>";

if ($resource->is_problem() &&	if ($resource->is_problem() &&
!$firstDisplayed) {	!$firstDisplayed) {
my $icon = $statusIconMap{$resource->status($part)};
	my $icon = $statusIconMap{$resource->simpleStatus($part)};
my $alt = $iconAltTags{$icon};	my $alt = $iconAltTags{$icon};
if ($icon) {	if ($icon) {
$result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='/adm/lonIcons/$icon' border='0' alt='$alt' />$linkclose</td>\n";	my $location=
	&Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
	$result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";
} else {	} else {
$result .= "<td width='30'> </td>\n";	$result .= "<td width='30'> </td>\n";
}	}
Line 1021 sub render_long_status {	Line 1294 sub render_long_status {
$params->{'multipart'} && $part eq "0";	$params->{'multipart'} && $part eq "0";

my $color;	my $color;
if ($resource->is_problem() && ($resource->countParts() <= 1) ) {	if ($resource->is_problem()) {
$color = $colormap{$resource->status};	$color = $colormap{$resource->status};

if (dueInLessThen24Hours($resource, $part) \|\|	if (dueInLessThan24Hours($resource, $part) \|\|
lastTry($resource, $part)) {	lastTry($resource, $part)) {
$color = $hurryUpColor;	$color = $hurryUpColor;
}	}
Line 1040 sub render_long_status {	Line 1313 sub render_long_status {
if ($resource->is_map() && advancedUser() && $resource->randompick()) {	if ($resource->is_map() && advancedUser() && $resource->randompick()) {
$result .= '(randomly select ' . $resource->randompick() .')';	$result .= '(randomly select ' . $resource->randompick() .')';
}	}

	# Debugging code
	#$result .= " " . $resource->awarded($part) . '/' . $resource->weight($part) .
	# ' - Part: ' . $part;

	$result .= "</td>\n";

return $result;	return $result;
}	}

	# Colors obtained by taking the icons, matching the colors, and
	# possibly reducing the Value (HSV) of the color, if it's too bright
	# for text, generally by one third or so.
	my %statusColors =
	(
	$resObj->CLOSED => '#000000',
	$resObj->OPEN => '#998b13',
	$resObj->CORRECT => '#26933f',
	$resObj->INCORRECT => '#c48207',
	$resObj->ATTEMPTED => '#a87510',
	$resObj->ERROR => '#000000'
	);
	my %statusStrings =
	(
	$resObj->CLOSED => 'Not yet open',
	$resObj->OPEN => 'Open',
	$resObj->CORRECT => 'Correct',
	$resObj->INCORRECT => 'Incorrect',
	$resObj->ATTEMPTED => 'Attempted',
	$resObj->ERROR => 'Network Error'
	);
	my @statuses = ($resObj->CORRECT, $resObj->ATTEMPTED, $resObj->INCORRECT, $resObj->OPEN, $resObj->CLOSED, $resObj->ERROR);

	use Data::Dumper;
	sub render_parts_summary_status {
	my ($resource, $part, $params) = @_;
	if (!$resource->is_problem() && !$resource->contains_problem) { return '<td></td>'; }
	if ($params->{showParts}) {
	return '<td></td>';
	}

	my $td = "<td align='right'>\n";
	my $endtd = "</td>\n";
	my @probs;

	if ($resource->contains_problem) {
	@probs=$resource->retrieveResources($resource,sub { $_[0]->is_problem() },1,0);
	} else {
	@probs=($resource);
	}
	my $return;
	my %overallstatus;
	my $totalParts;
	foreach my $resource (@probs) {
	# If there is a single part, just show the simple status
	if ($resource->singlepart()) {
	my $status = $resource->simpleStatus(${$resource->parts}[0]);
	$overallstatus{$status}++;
	$totalParts++;
	next;
	}
	# Now we can be sure the $part doesn't really matter.
	my $statusCount = $resource->simpleStatusCount();
	my @counts;
	foreach my $status (@statuses) {
	# decouple display order from the simpleStatusCount order
	my $slot = Apache::lonnavmaps::resource::statusToSlot($status);
	if ($statusCount->[$slot]) {
	$overallstatus{$status}+=$statusCount->[$slot];
	$totalParts+=$statusCount->[$slot];
	}
	}
	}
	$return.= $td . $totalParts . ' parts: ';
	foreach my $status (@statuses) {
	if ($overallstatus{$status}) {
	$return.="<font color='" . $statusColors{$status} .
	"'>" . $overallstatus{$status} . ' '
	. $statusStrings{$status} . "</font>";
	}
	}
	$return.= $endtd;
	return $return;
	}

my @preparedColumns = (\&render_resource, \&render_communication_status,	my @preparedColumns = (\&render_resource, \&render_communication_status,
\&render_quick_status, \&render_long_status);	\&render_quick_status, \&render_long_status,
	\&render_parts_summary_status);

sub setDefault {	sub setDefault {
my ($val, $default) = @_;	my ($val, $default) = @_;
Line 1053 sub setDefault {	Line 1408 sub setDefault {
return $val;	return $val;
}	}

	sub cmp_title {
	my ($atitle,$btitle) = (lc($_[0]->compTitle),lc($_[1]->compTitle));
	$atitle=~s/^\s*//;
	$btitle=~s/^\s*//;
	return $atitle cmp $btitle;
	}

sub render {	sub render {
my $args = shift;	my $args = shift;
&Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});	&Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
my $result = '';	my $result = '';

# Configure the renderer.	# Configure the renderer.
my $cols = $args->{'cols'};	my $cols = $args->{'cols'};
if (!defined($cols)) {	if (!defined($cols)) {
# no columns, no nav maps.	# no columns, no nav maps.
return '';	return '';
}	}
my $mustCloseNavMap = 0;
my $navmap;	my $navmap;
if (defined($args->{'navmap'})) {	if (defined($args->{'navmap'})) {
$navmap = $args->{'navmap'};	$navmap = $args->{'navmap'};
Line 1075 sub render {	Line 1435 sub render {
my $jump = $args->{'jump'};	my $jump = $args->{'jump'};
my $here = $args->{'here'};	my $here = $args->{'here'};
my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);	my $suppressNavmap = setDefault($args->{'suppressNavmap'}, 0);
	my $closeAllPages = setDefault($args->{'closeAllPages'}, 0);
my $currentJumpDelta = 2; # change this to change how many resources are displayed	my $currentJumpDelta = 2; # change this to change how many resources are displayed
# before the current resource when using #current	# before the current resource when using #current

Line 1084 sub render {	Line 1445 sub render {
# marker	# marker
my $filterHash = {};	my $filterHash = {};
# Figure out what we're not displaying	# Figure out what we're not displaying
foreach (split(/\,/, $ENV{"form.filter"})) {	foreach (split(/\,/, $env{"form.filter"})) {
if ($_) {	if ($_) {
$filterHash->{$_} = "1";	$filterHash->{$_} = "1";
}	}
Line 1104 sub render {	Line 1465 sub render {
}	}

my $condition = 0;	my $condition = 0;
if ($ENV{'form.condition'}) {	if ($env{'form.condition'}) {
$condition = 1;	$condition = 1;
}	}

if (!$ENV{'form.folderManip'} && !defined($args->{'iterator'})) {	if (!$env{'form.folderManip'} && !defined($args->{'iterator'})) {
# Step 1: Check to see if we have a navmap	# Step 1: Check to see if we have a navmap
if (!defined($navmap)) {	if (!defined($navmap)) {
$navmap = Apache::lonnavmaps::navmap->new(	$navmap = Apache::lonnavmaps::navmap->new();
$ENV{"request.course.fn"}.".db",	if (!defined($navmap)) {
$ENV{"request.course.fn"}."_parms.db", 1, 1);	# no londer in course
$mustCloseNavMap = 1;	return '<font color="red">'.&mt('No course selected').'</font><br />
}	<a href="/adm/roles">'.&mt('Select a course').'</a><br />';
$navmap->init();	}
	}

# Step two: Locate what kind of here marker is necessary	# Step two: Locate what kind of here marker is necessary
# Determine where the "here" marker is and where the screen jumps to.	# Determine where the "here" marker is and where the screen jumps to.

if ($ENV{'form.postsymb'}) {	if ($env{'form.postsymb'} ne '') {
$here = $jump = $ENV{'form.postsymb'};	$here = $jump = &Apache::lonnet::symbclean($env{'form.postsymb'});
} elsif ($ENV{'form.postdata'}) {	} elsif ($env{'form.postdata'} ne '') {
# couldn't find a symb, is there a URL?	# couldn't find a symb, is there a URL?
my $currenturl = $ENV{'form.postdata'};	my $currenturl = $env{'form.postdata'};
#$currenturl=~s/^http\:\/\///;	#$currenturl=~s/^http\:\/\///;
#$currenturl=~s/^[^\/]+//;	#$currenturl=~s/^[^\/]+//;

$here = $jump = &Apache::lonnet::symbread($currenturl);	$here = $jump = &Apache::lonnet::symbread($currenturl);
}	}
	if ($here eq '') {
	my $last;
	if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
	&GDBM_READER(),0640)) {
	$last=$hash{'last_known'};
	untie(%hash);
	}
	if ($last) { $here = $jump = $last; }
	}

# Step three: Ensure the folders are open	# Step three: Ensure the folders are open
my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);	my $mapIterator = $navmap->getIterator(undef, undef, undef, 1);
my $depth = 1;	my $curRes;
$mapIterator->next(); # discard the first BEGIN_MAP
my $curRes = $mapIterator->next();
my $found = 0;	my $found = 0;

# We only need to do this if we need to open the maps to show the	# We only need to do this if we need to open the maps to show the
# current position. This will change the counter so we can't count	# current position. This will change the counter so we can't count
# for the jump marker with this loop.	# for the jump marker with this loop.
while ($depth > 0 && !$found) {	while ($here && ($curRes = $mapIterator->next()) && !$found) {
if ($curRes == $mapIterator->BEGIN_MAP()) { $depth++; }
if ($curRes == $mapIterator->END_MAP()) { $depth--; }

if (ref($curRes) && $curRes->symb() eq $here) {	if (ref($curRes) && $curRes->symb() eq $here) {
my $mapStack = $mapIterator->getStack();	my $mapStack = $mapIterator->getStack();

Line 1159 sub render {	Line 1525 sub render {
}	}
$found = 1;	$found = 1;
}	}

$curRes = $mapIterator->next();
}	}
}	}

if ( !defined($args->{'iterator'}) && $ENV{'form.folderManip'} ) { # we came from a user's manipulation of the nav page	if ( !defined($args->{'iterator'}) && $env{'form.folderManip'} ) { # we came from a user's manipulation of the nav page
# If this is a click on a folder or something, we want to preserve the "here"	# If this is a click on a folder or something, we want to preserve the "here"
# from the querystring, and get the new "jump" marker	# from the querystring, and get the new "jump" marker
$here = $ENV{'form.here'};	$here = $env{'form.here'};
$jump = $ENV{'form.jump'};	$jump = $env{'form.jump'};
}	}

my $it = $args->{'iterator'};	my $it = $args->{'iterator'};
if (!defined($it)) {	if (!defined($it)) {
# Construct a default iterator based on $ENV{'form.'} information	# Construct a default iterator based on $env{'form.'} information

# Step 1: Check to see if we have a navmap	# Step 1: Check to see if we have a navmap
if (!defined($navmap)) {	if (!defined($navmap)) {
$navmap = Apache::lonnavmaps::navmap->new($r,	$navmap = Apache::lonnavmaps::navmap->new();
$ENV{"request.course.fn"}.".db",
$ENV{"request.course.fn"}."_parms.db", 1, 1);
$mustCloseNavMap = 1;
}	}
# Paranoia: Make sure it's ready
$navmap->init();

# See if we're being passed a specific map	# See if we're being passed a specific map
if ($args->{'iterator_map'}) {	if ($args->{'iterator_map'}) {
Line 1197 sub render {	Line 1556 sub render {
$args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);	$args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition);
}	}
}	}

# (re-)Locate the jump point, if any	# (re-)Locate the jump point, if any
# Note this does not take filtering or hidden into account... need	# Note this does not take filtering or hidden into account... need
# to be fixed?	# to be fixed?
my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);	my $mapIterator = $navmap->getIterator(undef, undef, $filterHash, 0);
my $depth = 1;	my $curRes;
$mapIterator->next();
my $curRes = $mapIterator->next();
my $foundJump = 0;	my $foundJump = 0;
my $counter = 0;	my $counter = 0;

while ($depth > 0 && !$foundJump) {	while (($curRes = $mapIterator->next()) && !$foundJump) {
if ($curRes == $mapIterator->BEGIN_MAP()) { $depth++; }
if ($curRes == $mapIterator->END_MAP()) { $depth--; }
if (ref($curRes)) { $counter++; }	if (ref($curRes)) { $counter++; }

if (ref($curRes) && $jump eq $curRes->symb()) {	if (ref($curRes) && $jump eq $curRes->symb()) {
Line 1221 sub render {	Line 1576 sub render {
$args->{'currentJumpIndex'} = $counter;	$args->{'currentJumpIndex'} = $counter;
$foundJump = 1;	$foundJump = 1;
}	}

$curRes = $mapIterator->next();
}	}

my $showParts = setDefault($args->{'showParts'}, 1);	my $showParts = setDefault($args->{'showParts'}, 1);
Line 1233 sub render {	Line 1586 sub render {
my $printKey = $args->{'printKey'};	my $printKey = $args->{'printKey'};
my $printCloseAll = $args->{'printCloseAll'};	my $printCloseAll = $args->{'printCloseAll'};
if (!defined($printCloseAll)) { $printCloseAll = 1; }	if (!defined($printCloseAll)) { $printCloseAll = 1; }

# Print key?	# Print key?
if ($printKey) {	if ($printKey) {
$result .= '<table border="0" cellpadding="2" cellspacing="0">';	$result .= '<table border="0" cellpadding="2" cellspacing="0">';
my $date=localtime;	my $date=localtime;
$result.='<tr><td align="right" valign="bottom">Key:  </td>';	$result.='<tr><td align="right" valign="bottom">Key:  </td>';
	my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
if ($navmap->{LAST_CHECK}) {	if ($navmap->{LAST_CHECK}) {
$result .=	$result .=
'<img src="/adm/lonMisc/chat.gif"> New discussion since '.	'<img src="'.$location.'/chat.gif"> '.&mt('New discussion since').' '.
strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).	strftime("%A, %b %e at %I:%M %P", localtime($navmap->{LAST_CHECK})).
'</td><td align="center" valign="bottom">  '.	'</td><td align="center" valign="bottom">  '.
'<img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>'.	'<img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').'<p>'.
'</td>';	'</td>';
} else {	} else {
$result .= '<td align="center" valign="bottom">  '.	$result .= '<td align="center" valign="bottom">  '.
'<img src="/adm/lonMisc/chat.gif"> Discussions</td><td align="center" valign="bottom">'.	'<img src="'.$location.'/chat.gif"> '.&mt('Discussions').'</td><td align="center" valign="bottom">'.
'  <img src="/adm/lonMisc/feedback.gif"> New message (click to open)'.	'  <img src="'.$location.'/feedback.gif"> '.&mt('New message (click to open)').
'</td>';	'</td>';
}	}

Line 1257 sub render {	Line 1611 sub render {
}	}

if ($printCloseAll && !$args->{'resource_no_folder_link'}) {	if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
	my ($link,$text);
if ($condition) {	if ($condition) {
$result.="<a href=\"navmaps?condition=0&filter=&$queryString" .	$link='"navmaps?condition=0&filter=&'.$queryString.
"&here=" . Apache::lonnet::escape($here) .	'&here='.&Apache::lonnet::escape($here).'"';
"\">Close All Folders</a>";	$text='Close All Folders';
} else {	} else {
$result.="<a href=\"navmaps?condition=1&filter=&$queryString" .	$link='"navmaps?condition=1&filter=&'.$queryString.
"&here=" . Apache::lonnet::escape($here) .	'&here='.&Apache::lonnet::escape($here).'"';
"\">Open All Folders</a>";	$text='Open All Folders';
	}
	if ($args->{'caller'} eq 'navmapsdisplay') {
	&add_linkitem($args->{'linkitems'},'changefolder',
	'location.href='.$link,$text);
	} else {
	$result.='<a href='.$link.'>'.&mt($text).'</a>';
	}
	$result .= "\n";
	}

	# Check for any unread discussions in all resources.
	if ($args->{'caller'} eq 'navmapsdisplay') {
	&add_linkitem($args->{'linkitems'},'clearbubbles',
	'document.clearbubbles.submit()',
	'Mark all posts read');
	my $time=time;
	$result .= (<<END);
	<form name="clearbubbles" method="post" action="/adm/feedback">
	<input type="hidden" name="navurl" value="$ENV{'QUERY_STRING'}" />
	<input type="hidden" name="navtime" value="$time" />
	END
	if ($args->{'sort'} eq 'discussion') {
	my $totdisc = 0;
	my $haveDisc = '';
	my @allres=$navmap->retrieveResources();
	foreach my $resource (@allres) {
	if ($resource->hasDiscussion()) {
	$haveDisc .= $resource->wrap_symb().':';
	$totdisc ++;
	}
	}
	if ($totdisc > 0) {
	$haveDisc =~ s/:$//;
	$result .= (<<END);
	<input type="hidden" name="navmaps" value="$haveDisc" />
	</form>
	END
	}
	}
	$result.='</form>';
	}

	if ($args->{'caller'} eq 'navmapsdisplay') {
	$result .= '<table><tr><td>'.
	&Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT').'</td>';
	if ($env{'environment.remotenavmap'} ne 'on') {
	$result .= '<td> </td>';
	} else {
	$result .= '</tr><tr>';
}	}
$result .= "<br /><br />\n";	$result.=&show_linkitems($args->{'linkitems'});
}	if ($args->{'sort_html'}) {
	if ($env{'environment.remotenavmap'} ne 'on') {
	$result.='<td> </td><td> </td><td> </td>'.
	'<td align="right">'.$args->{'sort_html'}.'</td></tr>';
	} else {
	$result.='</tr><tr><td align="left"><br />'.
	$args->{'sort_html'}.'</td></tr>';
	}
	}
	$result .= '</table>';
	} elsif ($args->{'sort_html'}) {
	$result.=$args->{'sort_html'};
	}

	$result .= "<br />\n";
if ($r) {	if ($r) {
$r->print($result);	$r->print($result);
$r->rflush();	$r->rflush();
Line 1290 sub render {	Line 1707 sub render {
$args->{'indentLevel'} = 0;	$args->{'indentLevel'} = 0;
$args->{'isNewBranch'} = 0;	$args->{'isNewBranch'} = 0;
$args->{'condensed'} = 0;	$args->{'condensed'} = 0;
$args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='/adm/lonIcons/whitespace1.gif' width='25' height='1' alt='' border='0' />");	my $location=
	&Apache::loncommon::lonhttpdurl("/adm/lonIcons/whitespace1.gif");
	$args->{'indentString'} = setDefault($args->{'indentString'}, "<img src='$location' width='25' height='1' alt='  ' border='0' />");
$args->{'displayedHereMarker'} = 0;	$args->{'displayedHereMarker'} = 0;

# If we're suppressing empty sequences, look for them here. Use DFS for speed,	# If we're suppressing empty sequences, look for them here. Use DFS for speed,
Line 1300 sub render {	Line 1719 sub render {
$it->{FIRST_RESOURCE},	$it->{FIRST_RESOURCE},
$it->{FINISH_RESOURCE},	$it->{FINISH_RESOURCE},
{}, undef, 1);	{}, undef, 1);
$depth = 0;	my $depth = 0;
$dfsit->next();	$dfsit->next();
my $curRes = $dfsit->next();	my $curRes = $dfsit->next();
while ($depth > -1) {	while ($depth > -1) {
Line 1332 sub render {	Line 1751 sub render {

my $displayedJumpMarker = 0;	my $displayedJumpMarker = 0;
# Set up iteration.	# Set up iteration.
$depth = 1;
$it->next(); # discard initial BEGIN_MAP
$curRes = $it->next();
my $now = time();	my $now = time();
my $in24Hours = $now + 24 * 60 * 60;	my $in24Hours = $now + 24 * 60 * 60;
my $rownum = 0;	my $rownum = 0;
Line 1342 sub render {	Line 1758 sub render {
# export "here" marker information	# export "here" marker information
$args->{'here'} = $here;	$args->{'here'} = $here;

while ($depth > 0) {	$args->{'indentLevel'} = -1; # first BEGIN_MAP takes this to 0
if ($curRes == $it->BEGIN_MAP()) { $depth++; }	my @resources;
if ($curRes == $it->END_MAP()) { $depth--; }	my $code='';# sub { !(shift->is_map();) };
	if ($args->{'sort'} eq 'title') {
	my $oldFilterFunc = $filterFunc;
	my $filterFunc=
	sub {
	my ($res)=@_;
	if ($res->is_map()) { return 0;}
	return &$oldFilterFunc($res);
	};
	@resources=$navmap->retrieveResources(undef,$filterFunc);
	@resources= sort { &cmp_title($a,$b) } @resources;
	} elsif ($args->{'sort'} eq 'duedate') {
	my $oldFilterFunc = $filterFunc;
	my $filterFunc=
	sub {
	my ($res)=@_;
	if (!$res->is_problem()) { return 0;}
	return &$oldFilterFunc($res);
	};
	@resources=$navmap->retrieveResources(undef,$filterFunc);
	@resources= sort {
	if ($a->duedate ne $b->duedate) {
	return $a->duedate cmp $b->duedate;
	}
	my $value=&cmp_title($a,$b);
	return $value;
	} @resources;
	} elsif ($args->{'sort'} eq 'discussion') {
	my $oldFilterFunc = $filterFunc;
	my $filterFunc=
	sub {
	my ($res)=@_;
	if (!$res->hasDiscussion() &&
	!$res->getFeedback() &&
	!$res->getErrors()) { return 0;}
	return &$oldFilterFunc($res);
	};
	@resources=$navmap->retrieveResources(undef,$filterFunc);
	@resources= sort { &cmp_title($a,$b) } @resources;
	} else {
	#unknow sort mechanism or default
	undef($args->{'sort'});
	}


	while (1) {
	if ($args->{'sort'}) {
	$curRes = shift(@resources);
	} else {
	$curRes = $it->next($closeAllPages);
	}
	if (!$curRes) { last; }

# Maintain indentation level.	# Maintain indentation level.
if ($curRes == $it->BEGIN_MAP() \|\|	if ($curRes == $it->BEGIN_MAP() \|\|
Line 1395 sub render {	Line 1862 sub render {
$args->{'multipart'} = $curRes->multipart();	$args->{'multipart'} = $curRes->multipart();

if ($condenseParts) { # do the condensation	if ($condenseParts) { # do the condensation
if (!$curRes->opendate("0")) {
@parts = ();
$args->{'condensed'} = 1;
}
if (!$args->{'condensed'}) {	if (!$args->{'condensed'}) {
# Decide whether to condense based on similarity	# Decide whether to condense based on similarity
my $status = $curRes->status($parts[0]);	my $status = $curRes->status($parts[0]);
Line 1448 sub render {	Line 1911 sub render {
# Add part 0 so we display it correctly.	# Add part 0 so we display it correctly.
unshift @parts, '0';	unshift @parts, '0';
}	}

	{
	my ($src,$symb,$anchor,$stack);
	if ($args->{'sort'}) {
	my $it = $navmap->getIterator(undef, undef, undef, 1);
	while ( my $res=$it->next()) {
	if (ref($res) &&
	$res->symb() eq $curRes->symb()) { last; }
	}
	$stack=$it->getStack();
	} else {
	$stack=$it->getStack();
	}
	($src,$symb,$anchor)=getLinkForResource($stack);
	if (defined($anchor)) { $anchor='#'.$anchor; }
	my $srcHasQuestion = $src =~ /\?/;
	$args->{"resourceLink"} = $src.
	($srcHasQuestion?'&':'?') .
	'symb=' . &Apache::lonnet::escape($symb).$anchor;
	}
# Now, we've decided what parts to show. Loop through them and	# Now, we've decided what parts to show. Loop through them and
# show them.	# show them.
foreach my $part (@parts) {	foreach my $part (@parts) {
Line 1459 sub render {	Line 1941 sub render {

# Set up some data about the parts that the cols might want	# Set up some data about the parts that the cols might want
my $filter = $it->{FILTER};	my $filter = $it->{FILTER};
my $stack = $it->getStack();
my $src = getLinkForResource($stack);

my $srcHasQuestion = $src =~ /\?/;
$args->{"resourceLink"} = $src.
($srcHasQuestion?'&':'?') .
'symb=' . &Apache::lonnet::escape($curRes->symb());

# Now, display each column.	# Now, display each column.
foreach my $col (@$cols) {	foreach my $col (@$cols) {
my $colHTML = '';	my $colHTML = '';
Line 1498 sub render {	Line 1973 sub render {
$r->rflush();	$r->rflush();
}	}
} continue {	} continue {
$curRes = $it->next();	if ($r) {
	# If we have the connection, make sure the user is still connected
	my $c = $r->connection;
	if ($c->aborted()) {
	# Who cares what we do, nobody will see it anyhow.
	return '';
	}
	}
}	}

# Print out the part that jumps to #curloc if it exists	# Print out the part that jumps to #curloc if it exists
Line 1509 sub render {	Line 1991 sub render {
# it's quite likely this might fix other browsers, too, and	# it's quite likely this might fix other browsers, too, and
# certainly won't hurt anything.	# certainly won't hurt anything.
if ($displayedJumpMarker) {	if ($displayedJumpMarker) {
$result .= "<script>setTimeout(\"location += '#curloc';\", 0)</script>\n";	$result .= "
	<script>
	if (location.href.indexOf('#curloc')==-1) {
	setTimeout(\"location += '#curloc';\", 0)
	}
	</script>";
}	}

$result .= "</table>";	$result .= "</table>";
Line 1520 sub render {	Line 2007 sub render {
$r->rflush();	$r->rflush();
}	}

if ($mustCloseNavMap) { $navmap->untieHashes(); }	return $result;
	}

	sub add_linkitem {
	my ($linkitems,$name,$cmd,$text)=@_;
	$$linkitems{$name}{'cmd'}=$cmd;
	$$linkitems{$name}{'text'}=&mt($text);
	}

	sub show_linkitems {
	my ($linkitems)=@_;
	my @linkorder = ("blank","launchnav","closenav","firsthomework",
	"everything","uncompleted","changefolder","clearbubbles");

	my $result .= (<<ENDBLOCK);
	<td align="left">
	<script type="text/javascript">
	function changeNavDisplay () {
	var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
	ENDBLOCK
	foreach my $link (@linkorder) {
	$result.= "if (navchoice == '$link') {".
	$linkitems->{$link}{'cmd'}."}\n";
	}
	$result.='}
	</script>
	<form name="linkitems" method="post">
	<nobr><select name="toplink">'."\n";
	foreach my $link (@linkorder) {
	if (defined($linkitems->{$link})) {
	if ($linkitems->{$link}{'text'} ne '') {
	$result .= ' <option value="'.$link.'">'.
	$linkitems->{$link}{'text'}."</option>\n";
	}
	}
	}
	$result .= '</select> <input type="button" name="chgnav"
	value="Go" onClick="javascript:changeNavDisplay()" />
	</nobr></form></td>'."\n";

return $result;	return $result;
}	}

Line 1531 package Apache::lonnavmaps::navmap;	Line 2056 package Apache::lonnavmaps::navmap;

=pod	=pod

lonnavmaps provides functions and objects for dealing with the	=head1 Object: Apache::lonnavmaps::navmap
compiled course hashes generated when a user enters the course, the
Apache handler for the "Navigation Map" button, and a flexible
prepared renderer for navigation maps that are easy to use anywhere.

=head1 Object: navmap	=head2 Overview

Encapsulating the compiled nav map	The navmap object's job is to provide access to the resources
	in the course as Apache::lonnavmaps::resource objects, and to
	query and manage the relationship between those resource objects.

navmap is an object that encapsulates a compiled course map and	Generally, you'll use the navmap object in one of three basic ways.
provides a reasonable interface to it.	In order of increasing complexity and power:

Most notably it provides a way to navigate the map sensibly and a	=over 4
flexible iterator that makes it easy to write various renderers based
on nav maps.

You must obtain resource objects through the navmap object.	=item * C<$navmap-E<gt>getByX>, where X is B<Id>, B<Symb> or B<MapPc> and getResourceByUrl. This provides
	various ways to obtain resource objects, based on various identifiers.
	Use this when you want to request information about one object or
	a handful of resources you already know the identities of, from some
	other source. For more about Ids, Symbs, and MapPcs, see the
	Resource documentation. Note that Url should be a B<last resort>,
	not your first choice; it only really works when there is only one
	instance of the resource in the course, which only applies to
	maps, and even that may change in the future (see the B<getResourceByUrl>
	documentation for more details.)

	=item * C<my @resources = $navmap-E<gt>retrieveResources(args)>. This
	retrieves resources matching some criterion and returns them
	in a flat array, with no structure information. Use this when
	you are manipulating a series of resources, based on what map
	the are in, but do not care about branching, or exactly how
	the maps and resources are related. This is the most common case.

	=item * C<$it = $navmap-E<gt>getIterator(args)>. This allows you traverse
	the course's navmap in various ways without writing the traversal
	code yourself. See iterator documentation below. Use this when
	you need to know absolutely everything about the course, including
	branches and the precise relationship between maps and resources.

=head2 Methods	=back

	=head2 Creation And Destruction

	To create a navmap object, use the following function:

=over 4	=over 4

=item * B<new>(navHashFile, parmHashFile, genCourseAndUserOptions,	=item * B<Apache::lonnavmaps::navmap-E<gt>new>():
genMailDiscussStatus):
	Creates a new navmap object. Returns the navmap object if this is
	successful, or B<undef> if not.

	=back

Binds a new navmap object to the compiled nav map hash and parm hash	=head2 Methods
given as filenames. genCourseAndUserOptions is a flag saying whether
the course options and user options hash should be generated. This is	=over 4
for when you are using the parameters of the resources that require
them; see documentation in resource object
documentation. genMailDiscussStatus causes the nav map to retreive
information about the email and discussion status of
resources. Returns the navmap object if this is successful, or
B<undef> if not. You must check for undef; errors will occur when you
try to use the other methods otherwise.

=item * B<getIterator>(first, finish, filter, condition):	=item * B<getIterator>(first, finish, filter, condition):

Line 1575 See iterator documentation below.	Line 2120 See iterator documentation below.

use strict;	use strict;
use GDBM_File;	use GDBM_File;
	use Apache::lonnet;

sub new {	sub new {
# magic invocation to create a class instance	# magic invocation to create a class instance
Line 1582 sub new {	Line 2128 sub new {
my $class = ref($proto) \|\| $proto;	my $class = ref($proto) \|\| $proto;
my $self = {};	my $self = {};

$self->{NAV_HASH_FILE} = shift;
$self->{PARM_HASH_FILE} = shift;
$self->{GENERATE_COURSE_USER_OPT} = shift;
$self->{GENERATE_EMAIL_DISCUSS_STATUS} = shift;

# Resource cache stores navmap resources as we reference them. We generate	# Resource cache stores navmap resources as we reference them. We generate
# them on-demand so we don't pay for creating resources unless we use them.	# them on-demand so we don't pay for creating resources unless we use them.
$self->{RESOURCE_CACHE} = {};	$self->{RESOURCE_CACHE} = {};
Line 1599 sub new {	Line 2140 sub new {

my %navmaphash;	my %navmaphash;
my %parmhash;	my %parmhash;
if (!(tie(%navmaphash, 'GDBM_File', $self->{NAV_HASH_FILE},	my $courseFn = $env{"request.course.fn"};
	if (!(tie(%navmaphash, 'GDBM_File', "${courseFn}.db",
&GDBM_READER(), 0640))) {	&GDBM_READER(), 0640))) {
return undef;	return undef;
}	}

if (!(tie(%parmhash, 'GDBM_File', $self->{PARM_HASH_FILE},	if (!(tie(%parmhash, 'GDBM_File', "${courseFn}_parms.db",
&GDBM_READER(), 0640)))	&GDBM_READER(), 0640)))
{	{
untie %{$self->{PARM_HASH}};	untie %{$self->{PARM_HASH}};
Line 1613 sub new {	Line 2155 sub new {

$self->{NAV_HASH} = \%navmaphash;	$self->{NAV_HASH} = \%navmaphash;
$self->{PARM_HASH} = \%parmhash;	$self->{PARM_HASH} = \%parmhash;
$self->{INITED} = 0;	$self->{PARM_CACHE} = {};

bless($self);	bless($self);

return $self;	return $self;
}	}

sub init {	sub generate_course_user_opt {
my $self = shift;	my $self = shift;
if ($self->{INITED}) { return; }	if ($self->{COURSE_USER_OPT_GENERATED}) { return; }

# If the course opt hash and the user opt hash should be generated,	my $uname=$env{'user.name'};
# generate them	my $udom=$env{'user.domain'};
if ($self->{GENERATE_COURSE_USER_OPT}) {	my $cid=$env{'request.course.id'};
my $uname=$ENV{'user.name'};	my $cdom=$env{'course.'.$cid.'.domain'};
my $udom=$ENV{'user.domain'};	my $cnum=$env{'course.'.$cid.'.num'};
my $uhome=$ENV{'user.home'};
my $cid=$ENV{'request.course.id'};
my $chome=$ENV{'course.'.$cid.'.home'};
my ($cdom,$cnum)=split(/\_/,$cid);

my $userprefix=$uname.'_'.$udom.'_';

my %courserdatas; my %useropt; my %courseopt; my %userrdatas;
unless ($uhome eq 'no_host') {
# ------------------------------------------------- Get coursedata (if present)	# ------------------------------------------------- Get coursedata (if present)
unless ((time-$courserdatas{$cid.'.last_cache'})<240) {	my $courseopt=&Apache::lonnet::get_courseresdata($cnum,$cdom);
my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.	# Check for network failure
':resourcedata',$chome);	if (!ref($courseopt)) {
# Check for network failure	if ( $courseopt =~ /no.such.host/i \|\| $courseopt =~ /con_lost/i) {
if ( $reply =~ /no.such.host/i \|\| $reply =~ /con_lost/i) {	$self->{NETWORK_FAILURE} = 1;
$self->{NETWORK_FAILURE} = 1;	}
} elsif ($reply!~/^error\:/) {	undef($courseopt);
$courserdatas{$cid}=$reply;	}
$courserdatas{$cid.'.last_cache'}=time;
}
}
foreach (split(/\&/,$courserdatas{$cid})) {
my ($name,$value)=split(/\=/,$_);
$courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
&Apache::lonnet::unescape($value);
}
# --------------------------------------------------- Get userdata (if present)	# --------------------------------------------------- Get userdata (if present)
unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);	my $useropt=&Apache::lonnet::get_userresdata($uname,$udom);
if ($reply!~/^error\:/) {	# Check for network failure
$userrdatas{$uname.'___'.$udom}=$reply;	if (!ref($useropt)) {
$userrdatas{$uname.'___'.$udom.'.last_cache'}=time;	if ( $useropt =~ /no.such.host/i \|\| $useropt =~ /con_lost/i) {
}	$self->{NETWORK_FAILURE} = 1;
# check to see if network failed	}
elsif ( $reply=~/no.such.host/i \|\| $reply=~/con.*lost/i )	undef($useropt);
{	}
$self->{NETWORK_FAILURE} = 1;
}
}
foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
my ($name,$value)=split(/\=/,$_);
$useropt{$userprefix.&Apache::lonnet::unescape($name)}=
&Apache::lonnet::unescape($value);
}
$self->{COURSE_OPT} = \%courseopt;
$self->{USER_OPT} = \%useropt;
}
}

if ($self->{GENERATE_EMAIL_DISCUSS_STATUS}) {	$self->{COURSE_OPT} = $courseopt;
my $cid=$ENV{'request.course.id'};	$self->{USER_OPT} = $useropt;
my ($cdom,$cnum)=split(/\_/,$cid);

my %emailstatus = &Apache::lonnet::dump('email_status');
my $logoutTime = $emailstatus{'logout'};
my $courseLeaveTime = $emailstatus{'logout_'.$ENV{'request.course.id'}};
$self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
$courseLeaveTime : $logoutTime);
my %discussiontime = &Apache::lonnet::dump('discussiontimes',
$cdom, $cnum);
my %feedback=();
my %error=();
my $keys = &Apache::lonnet::reply('keys:'.
$ENV{'user.domain'}.':'.
$ENV{'user.name'}.':nohist_email',
$ENV{'user.home'});

foreach my $msgid (split(/\&/, $keys)) {
$msgid=&Apache::lonnet::unescape($msgid);
my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
if ($plain=~/(Error\|Feedback) \[([^\]]+)\]/) {
my ($what,$url)=($1,$2);
my %status=
&Apache::lonnet::get('email_status',[$msgid]);
if ($status{$msgid}=~/^error\:/) {
$status{$msgid}='';
}

if (($status{$msgid} eq 'new') \|\|
(!$status{$msgid})) {
if ($what eq 'Error') {
$error{$url}.=','.$msgid;
} else {
$feedback{$url}.=','.$msgid;
}
}
}
}

$self->{FEEDBACK} = \%feedback;
$self->{ERROR_MSG} = \%error; # what is this? JB
$self->{DISCUSSION_TIME} = \%discussiontime;
$self->{EMAIL_STATUS} = \%emailstatus;

}

$self->{PARM_CACHE} = {};	$self->{COURSE_USER_OPT_GENERATED} = 1;
$self->{INITED} = 1;
	return;
	}

	sub generate_email_discuss_status {
	my $self = shift;
	my $symb = shift;
	if ($self->{EMAIL_DISCUSS_GENERATED}) { return; }

	my $cid=$env{'request.course.id'};
	my $cdom=$env{'course.'.$cid.'.domain'};
	my $cnum=$env{'course.'.$cid.'.num'};

	my %emailstatus = &Apache::lonnet::dump('email_status');
	my $logoutTime = $emailstatus{'logout'};
	my $courseLeaveTime = $emailstatus{'logout_'.$env{'request.course.id'}};
	$self->{LAST_CHECK} = (($courseLeaveTime > $logoutTime) ?
	$courseLeaveTime : $logoutTime);
	my %discussiontime = &Apache::lonnet::dump('discussiontimes',
	$cdom, $cnum);
	my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
	$env{'user.domain'},$env{'user.name'},'lastread');
	my %lastreadtime = ();
	foreach (keys %lastread) {
	my $key = $_;
	$key =~ s/_lastread$//;
	$lastreadtime{$key} = $lastread{$_};
	}

	my %feedback=();
	my %error=();
	my @keys = &Apache::lonnet::getkeys('nohist_email',$env{'user.domain'},
	$env{'user.name'});

	foreach my $msgid (@keys) {
	if ((!$emailstatus{$msgid}) \|\| ($emailstatus{$msgid} eq 'new')) {
	my $plain=
	&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
	if ($plain=~/ \[([^\]]+)\]\:/) {
	my $url=$1;
	if ($plain=~/\:Error \[/) {
	$error{$url}.=','.$msgid;
	} else {
	$feedback{$url}.=','.$msgid;
	}
	}
	}
	}

	#url's of resources that have feedbacks
	$self->{FEEDBACK} = \%feedback;
	#or errors
	$self->{ERROR_MSG} = \%error;
	$self->{DISCUSSION_TIME} = \%discussiontime;
	$self->{EMAIL_STATUS} = \%emailstatus;
	$self->{LAST_READ} = \%lastreadtime;

	$self->{EMAIL_DISCUSS_GENERATED} = 1;
}	}

	sub get_user_data {
	my $self = shift;
	if ($self->{RETRIEVED_USER_DATA}) { return; }

	# Retrieve performance data on problems
	my %student_data = Apache::lonnet::currentdump($env{'request.course.id'},
	$env{'user.domain'},
	$env{'user.name'});
	$self->{STUDENT_DATA} = \%student_data;

	$self->{RETRIEVED_USER_DATA} = 1;
	}

	sub get_discussion_data {
	my $self = shift;
	if ($self->{RETRIEVED_DISCUSSION_DATA}) {
	return $self->{DISCUSSION_DATA};
	}

	$self->generate_email_discuss_status();

	my $cid=$env{'request.course.id'};
	my $cdom=$env{'course.'.$cid.'.domain'};
	my $cnum=$env{'course.'.$cid.'.num'};
	# Retrieve discussion data for resources in course
	my %discussion_data = &Apache::lonnet::dumpstore($cid,$cdom,$cnum);


	$self->{DISCUSSION_DATA} = \%discussion_data;
	$self->{RETRIEVED_DISCUSSION_DATA} = 1;
	return $self->{DISCUSSION_DATA};
	}


# Internal function: Takes a key to look up in the nav hash and implements internal	# Internal function: Takes a key to look up in the nav hash and implements internal
# memory caching of that key.	# memory caching of that key.
sub navhash {	sub navhash {
Line 1736 sub navhash {	Line 2298 sub navhash {
return $self->{NAV_HASH}->{$key};	return $self->{NAV_HASH}->{$key};
}	}

	=pod

	=item * B<courseMapDefined>(): Returns true if the course map is defined,
	false otherwise. Undefined course maps indicate an error somewhere in
	LON-CAPA, and you will not be able to proceed with using the navmap.
	See the B<NAV> screen for an example of using this.

	=cut

# Checks to see if coursemap is defined, matching test in old lonnavmaps	# Checks to see if coursemap is defined, matching test in old lonnavmaps
sub courseMapDefined {	sub courseMapDefined {
my $self = shift;	my $self = shift;
my $uri = &Apache::lonnet::clutter($ENV{'request.course.uri'});	my $uri = &Apache::lonnet::clutter($env{'request.course.uri'});

my $firstres = $self->navhash("map_start_$uri");	my $firstres = $self->navhash("map_start_$uri");
my $lastres = $self->navhash("map_finish_$uri");	my $lastres = $self->navhash("map_finish_$uri");
Line 1749 sub courseMapDefined {	Line 2320 sub courseMapDefined {
sub getIterator {	sub getIterator {
my $self = shift;	my $self = shift;
my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,	my $iterator = Apache::lonnavmaps::iterator->new($self, shift, shift,
shift, undef, shift);	shift, undef, shift,
	shift, shift);
return $iterator;	return $iterator;
}	}

# unties the hash when done
sub untieHashes {
my $self = shift;
untie %{$self->{NAV_HASH}};
untie %{$self->{PARM_HASH}};
}

# Private method: Does the given resource (as a symb string) have	# Private method: Does the given resource (as a symb string) have
# current discussion? Returns 0 if chat/mail data not extracted.	# current discussion? Returns 0 if chat/mail data not extracted.
sub hasDiscussion {	sub hasDiscussion {
my $self = shift;	my $self = shift;
my $symb = shift;	my $symb = shift;
	$self->generate_email_discuss_status();

if (!defined($self->{DISCUSSION_TIME})) { return 0; }	if (!defined($self->{DISCUSSION_TIME})) { return 0; }

#return defined($self->{DISCUSSION_TIME}->{$symb});	#return defined($self->{DISCUSSION_TIME}->{$symb});
return $self->{DISCUSSION_TIME}->{$symb} >
$self->{LAST_CHECK};	# backward compatibility (bulletin boards used to be 'wrapped')
	my $ressymb = $self->wrap_symb($symb);
	if ( defined ( $self->{LAST_READ}->{$ressymb} ) ) {
	return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_READ}->{$ressymb};
	} else {
	# return $self->{DISCUSSION_TIME}->{$ressymb} > $self->{LAST_CHECK}; # v.1.1 behavior
	return $self->{DISCUSSION_TIME}->{$ressymb} > 0; # in 1.2 will display speech bubble icons for all items with posts until marked as read (even if read in v 1.1).
	}
	}

	sub last_post_time {
	my $self = shift;
	my $symb = shift;
	my $ressymb = $self->wrap_symb($symb);
	return $self->{DISCUSSION_TIME}->{$ressymb};
	}

	sub unread_discussion {
	my $self = shift;
	my $symb = shift;

	$self->get_discussion_data();

	my $ressymb = $self->wrap_symb($symb);
	# keys used to store bulletinboard postings use 'unwrapped' symb.
	my $discsymb = $self->unwrap_symb($ressymb);
	my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
	if (!$version) { return; }

	my $prevread = $self->{LAST_READ}{$ressymb};

	my $unreadcount = 0;
	my $hiddenflag = 0;
	my $deletedflag = 0;
	my ($hidden,$deleted);

	my %subjects;

	for (my $id=$version; $id>0; $id--) {
	my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
	my @keys=split(/:/,$vkeys);
	if (grep(/^hidden$/ ,@keys)) {
	if (!$hiddenflag) {
	$hidden = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':hidden'};
	$hiddenflag = 1;
	}
	} elsif (grep(/^deleted$/,@keys)) {
	if (!$deletedflag) {
	$deleted = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':deleted'};
	$deletedflag = 1;
	}
	} else {
	if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)
	&& $prevread < $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
	$unreadcount++;
	$subjects{$unreadcount}=
	$id.': '.$self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
	}
	}
	}
	if (wantarray) {
	return ($unreadcount,\%subjects);
	}
	return $unreadcount
	}

	sub wrap_symb {
	my $self = shift;
	my $symb = shift;
	if ($symb =~ m-___(adm/[^/]+/[^/]+/)(\d+)(/bulletinboard)$-) {
	unless ($symb =~ m\|adm/wrapper/adm\|) {
	$symb = 'bulletin___'.$2.'___adm/wrapper/'.$1.$2.$3;
	}
	}
	return $symb;
	}

	sub unwrap_symb {
	my $self = shift;
	my $ressymb = shift;
	my $discsymb = $ressymb;
	if ($ressymb =~ m-^(bulletin___\d+___)adm/wrapper/(adm/[^/]+/[^/]+/\d+/bulletinboard)$-) {
	$discsymb = $1.$2;
	}
	return $discsymb;
}	}

# Private method: Does the given resource (as a symb string) have	# Private method: Does the given resource (as a symb string) have
# current feedback? Returns the string in the feedback hash, which	# current feedback? Returns the string in the feedback hash, which
# will be false if it does not exist.	# will be false if it does not exist.

sub getFeedback {	sub getFeedback {
my $self = shift;	my $self = shift;
my $symb = shift;	my $symb = shift;

	$self->generate_email_discuss_status();

if (!defined($self->{FEEDBACK})) { return ""; }	if (!defined($self->{FEEDBACK})) { return ""; }

return $self->{FEEDBACK}->{$symb};	return $self->{FEEDBACK}->{$symb};
Line 1788 sub getFeedback {	Line 2442 sub getFeedback {
sub getErrors {	sub getErrors {
my $self = shift;	my $self = shift;
my $src = shift;	my $src = shift;

	$self->generate_email_discuss_status();

if (!defined($self->{ERROR_MSG})) { return ""; }	if (!defined($self->{ERROR_MSG})) { return ""; }
return $self->{ERROR_MSG}->{$src};	return $self->{ERROR_MSG}->{$src};
}	}
Line 1817 the given map. This is one of the proper	Line 2473 the given map. This is one of the proper
# The strategy here is to cache the resource objects, and only construct them	# The strategy here is to cache the resource objects, and only construct them
# as we use them. The real point is to prevent reading any more from the tied	# as we use them. The real point is to prevent reading any more from the tied
# hash then we have to, which should hopefully alleviate speed problems.	# hash then we have to, which should hopefully alleviate speed problems.
# Caching is just an incidental detail I throw in because it makes sense.

sub getById {	sub getById {
my $self = shift;	my $self = shift;
Line 1837 sub getById {	Line 2492 sub getById {
sub getBySymb {	sub getBySymb {
my $self = shift;	my $self = shift;
my $symb = shift;	my $symb = shift;
my ($mapUrl, $id, $filename) = split (/___/, $symb);
	my ($mapUrl, $id, $filename) = &Apache::lonnet::decode_symb($symb);
my $map = $self->getResourceByUrl($mapUrl);	my $map = $self->getResourceByUrl($mapUrl);
return $self->getById($map->map_pc() . '.' . $id);	my $returnvalue = undef;
	if (ref($map)) {
	$returnvalue = $self->getById($map->map_pc() .'.'.$id);
	}
	return $returnvalue;
}	}

sub getByMapPc {	sub getByMapPc {
Line 1862 resource in the navmap.	Line 2522 resource in the navmap.
sub firstResource {	sub firstResource {
my $self = shift;	my $self = shift;
my $firstResource = $self->navhash('map_start_' .	my $firstResource = $self->navhash('map_start_' .
&Apache::lonnet::clutter($ENV{'request.course.uri'}));	&Apache::lonnet::clutter($env{'request.course.uri'}));
return $self->getById($firstResource);	return $self->getById($firstResource);
}	}

Line 1878 in the navmap.	Line 2538 in the navmap.
sub finishResource {	sub finishResource {
my $self = shift;	my $self = shift;
my $firstResource = $self->navhash('map_finish_' .	my $firstResource = $self->navhash('map_finish_' .
&Apache::lonnet::clutter($ENV{'request.course.uri'}));	&Apache::lonnet::clutter($env{'request.course.uri'}));
return $self->getById($firstResource);	return $self->getById($firstResource);
}	}

Line 1900 sub parmval {	Line 2560 sub parmval {

sub parmval_real {	sub parmval_real {
my $self = shift;	my $self = shift;
my ($what,$symb) = @_;	my ($what,$symb,$recurse) = @_;

	# Make sure the {USER_OPT} and {COURSE_OPT} hashes are populated
	$self->generate_course_user_opt();

my $cid=$ENV{'request.course.id'};	my $cid=$env{'request.course.id'};
my $csec=$ENV{'request.course.sec'};	my $csec=$env{'request.course.sec'};
my $uname=$ENV{'user.name'};	my $cgroup='';
my $udom=$ENV{'user.domain'};	my @cgrps=split(/:/,$env{'request.course.groups'});
	if (@cgrps > 0) {
	@cgrps = sort(@cgrps);
	$cgroup = $cgrps[0];
	}
	my $uname=$env{'user.name'};
	my $udom=$env{'user.domain'};

unless ($symb) { return ''; }	unless ($symb) { return ''; }
my $result='';	my $result='';

my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);	my ($mapname,$id,$fn)=&Apache::lonnet::decode_symb($symb);

# ----------------------------------------------------- Cascading lookup scheme	# ----------------------------------------------------- Cascading lookup scheme
my $rwhat=$what;	my $rwhat=$what;
Line 1919 sub parmval_real {	Line 2588 sub parmval_real {

my $symbparm=$symb.'.'.$what;	my $symbparm=$symb.'.'.$what;
my $mapparm=$mapname.'___(all).'.$what;	my $mapparm=$mapname.'___(all).'.$what;
my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;	my $usercourseprefix=$cid;

	my $grplevel=$usercourseprefix.'.['.$cgroup.'].'.$what;
	my $grplevelr=$usercourseprefix.'.['.$cgroup.'].'.$symbparm;
	my $grplevelm=$usercourseprefix.'.['.$cgroup.'].'.$mapparm;

my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;	my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;	my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
Line 1941 sub parmval_real {	Line 2614 sub parmval_real {
}	}

# ------------------------------------------------------- second, check course	# ------------------------------------------------------- second, check course
	if ($cgroup ne '' and defined($courseopt)) {
	if (defined($$courseopt{$grplevelr})) { return $$courseopt{$grplevelr}; }
	if (defined($$courseopt{$grplevelm})) { return $$courseopt{$grplevelm}; }
	if (defined($$courseopt{$grplevel})) { return $$courseopt{$grplevel}; }
	}

if ($csec and defined($courseopt)) {	if ($csec and defined($courseopt)) {
if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }	if (defined($$courseopt{$seclevelr})) { return $$courseopt{$seclevelr}; }
if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }	if (defined($$courseopt{$seclevelm})) { return $$courseopt{$seclevelm}; }
Line 1949 sub parmval_real {	Line 2628 sub parmval_real {

if (defined($courseopt)) {	if (defined($courseopt)) {
if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }	if (defined($$courseopt{$courselevelr})) { return $$courseopt{$courselevelr}; }
if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
}	}

# ----------------------------------------------------- third, check map parms	# ----------------------------------------------------- third, check map parms
Line 1960 sub parmval_real {	Line 2637 sub parmval_real {

# ----------------------------------------------------- fourth , check default	# ----------------------------------------------------- fourth , check default

my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');	my $meta_rwhat=$rwhat;
	$meta_rwhat=~s/\./_/g;
	my $default=&Apache::lonnet::metadata($fn,$meta_rwhat);
	if (defined($default)) { return $default}
	$default=&Apache::lonnet::metadata($fn,'parameter_'.$meta_rwhat);
if (defined($default)) { return $default}	if (defined($default)) { return $default}

# --------------------------------------------------- fifth , cascade up parts	# --------------------------------------------------- fifth, check more course
	if (defined($courseopt)) {
	if (defined($$courseopt{$courselevelm})) { return $$courseopt{$courselevelm}; }
	if (defined($$courseopt{$courselevel})) { return $$courseopt{$courselevel}; }
	}

	# --------------------------------------------------- sixth , cascade up parts

my ($space,@qualifier)=split(/\./,$rwhat);	my ($space,@qualifier)=split(/\./,$rwhat);
my $qualifier=join('.',@qualifier);	my $qualifier=join('.',@qualifier);
Line 1972 sub parmval_real {	Line 2659 sub parmval_real {
my $id=pop(@parts);	my $id=pop(@parts);
my $part=join('_',@parts);	my $part=join('_',@parts);
if ($part eq '') { $part='0'; }	if ($part eq '') { $part='0'; }
my $partgeneral=$self->parmval($part.".$qualifier",$symb);	my $partgeneral=$self->parmval($part.".$qualifier",$symb,1);
if (defined($partgeneral)) { return $partgeneral; }	if (defined($partgeneral)) { return $partgeneral; }
}	}
	if ($recurse) { return undef; }
	my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);
	if (defined($pack_def)) { return $pack_def; }
return '';	return '';
}	}

=pod	=pod

=item * B<getResourceByUrl>(url):	=item * B<getResourceByUrl>(url,multiple):

Retrieves a resource object by URL of the resource. If passed a	Retrieves a resource object by URL of the resource, unless the optional
resource object, it will simply return it, so it is safe to use this	multiple parameter is included in wahich caes an array of resource
method in code like "$res = $navmap->getResourceByUrl($res)", if	objects is returned. If passed a resource object, it will simply return
you're not sure if $res is already an object, or just a URL. If the	it, so it is safe to use this method in code like
resource appears multiple times in the course, only the first instance	"$res = $navmap->getResourceByUrl($res)"
will be returned. As a result, this is probably useful only for maps.	if you're not sure if $res is already an object, or just a URL. If the
	resource appears multiple times in the course, only the first instance
	will be returned (useful for maps), unless the multiple parameter has
	been included, in which case all instances are returned in an array.

=item * B<retrieveResources>(map, filterFunc, recursive, bailout):	=item * B<retrieveResources>(map, filterFunc, recursive, bailout, showall):

The map is a specification of a map to retreive the resources from,	The map is a specification of a map to retreive the resources from,
either as a url or as an object. The filterFunc is a reference to a	either as a url or as an object. The filterFunc is a reference to a
Line 1997 function that takes a resource object as	Line 2690 function that takes a resource object as
true if the resource should be included, or false if it should not	true if the resource should be included, or false if it should not
be. If recursive is true, the map will be recursively examined,	be. If recursive is true, the map will be recursively examined,
otherwise it will not be. If bailout is true, the function will return	otherwise it will not be. If bailout is true, the function will return
as soon as it finds a resource, if false it will finish. By default,	as soon as it finds a resource, if false it will finish. If showall is
the map is the top-level map of the course, filterFunc is a function	true it will not hide maps that contain nothing but one other map. By
that always returns 1, recursive is true, bailout is false. The	default, the map is the top-level map of the course, filterFunc is a
resources will be returned in a list containing the resource objects	function that always returns 1, recursive is true, bailout is false,
for the corresponding resources, with B<no structure information> in	showall is false. The resources will be returned in a list containing
the list; regardless of branching, recursion, etc., it will be a flat	the resource objects for the corresponding resources, with B<no
list.	structure information> in the list; regardless of branching,
	recursion, etc., it will be a flat list.

Thus, this is suitable for cases where you don't want the structure,	Thus, this is suitable for cases where you don't want the structure,
just a list of all resources. It is also suitable for finding out how	just a list of all resources. It is also suitable for finding out how
Line 2012 want to know is if I<any> resources matc	Line 2706 want to know is if I<any> resources matc
parameter will allow you to avoid potentially expensive enumeration of	parameter will allow you to avoid potentially expensive enumeration of
all matching resources.	all matching resources.

=item * B<hasResources>(map, filterFunc, recursive):	=item * B<hasResource>(map, filterFunc, recursive, showall):

Convience method for	Convience method for

scalar(retrieveResources($map, $filterFunc, $recursive, 1)) > 0	scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0

which will tell whether the map has resources matching the description	which will tell whether the map has resources matching the description
in the filter function.	in the filter function.

	=item * B<usedVersion>(url):

	Retrieves version infomation for a url. Returns the version (a number, or
	the string "mostrecent") for resources which have version information in
	the big hash.

=cut	=cut


sub getResourceByUrl {	sub getResourceByUrl {
my $self = shift;	my $self = shift;
my $resUrl = shift;	my $resUrl = shift;
	my $multiple = shift;

if (ref($resUrl)) { return $resUrl; }	if (ref($resUrl)) { return $resUrl; }

$resUrl = &Apache::lonnet::clutter($resUrl);	$resUrl = &Apache::lonnet::clutter($resUrl);
my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};	my $resId = $self->{NAV_HASH}->{'ids_' . $resUrl};
if ($resId =~ /,/) {
$resId = (split (/,/, $resId))[0];
}
if (!$resId) { return ''; }	if (!$resId) { return ''; }
return $self->getById($resId);	if ($multiple) {
	my @resources = ();
	my @resIds = split (/,/, $resId);
	foreach my $id (@resIds) {
	my $resourceId = $self->getById($id);
	if ($resourceId) {
	push(@resources,$resourceId);
	}
	}
	return @resources;
	} else {
	if ($resId =~ /,/) {
	$resId = (split (/,/, $resId))[0];
	}
	return $self->getById($resId);
	}
}	}

sub retrieveResources {	sub retrieveResources {
Line 2049 sub retrieveResources {	Line 2763 sub retrieveResources {
if (!defined($recursive)) { $recursive = 1; }	if (!defined($recursive)) { $recursive = 1; }
my $bailout = shift;	my $bailout = shift;
if (!defined($bailout)) { $bailout = 0; }	if (!defined($bailout)) { $bailout = 0; }
	my $showall = shift;
# Create the necessary iterator.	# Create the necessary iterator.
if (!ref($map)) { # assume it's a url of a map.	if (!ref($map)) { # assume it's a url of a map.
$map = $self->getResourceByUrl($map);	$map = $self->getResourceByUrl($map);
}	}

	# If nothing was passed, assume top-level map
	if (!$map) {
	$map = $self->getById('0.0');
	}

# Check the map's validity.	# Check the map's validity.
if (!$map \|\| !$map->is_map()) {	if (!$map->is_map()) {
# Oh, to throw an exception.... how I'd love that!	# Oh, to throw an exception.... how I'd love that!
return ();	return ();
}	}

# Get an iterator.	# Get an iterator.
my $it = $self->getIterator($map->map_start(), $map->map_finish(),	my $it = $self->getIterator($map->map_start(), $map->map_finish(),
!$recursive);	undef, $recursive, $showall);

my @resources = ();	my @resources = ();

# Run down the iterator and collect the resources.	# Run down the iterator and collect the resources.
my $depth = 1;	my $curRes;
$it->next();
my $curRes = $it->next();	while ($curRes = $it->next()) {

while ($depth > 0) {
if ($curRes == $it->BEGIN_MAP()) {
$depth++;
}
if ($curRes == $it->END_MAP()) {
$depth--;
}

if (ref($curRes)) {	if (ref($curRes)) {
if (!&$filterFunc($curRes)) {	if (!&$filterFunc($curRes)) {
next;	next;
Line 2092 sub retrieveResources {	Line 2802 sub retrieveResources {
}	}
}	}

$curRes = $it->next();
}	}

return @resources;	return @resources;
Line 2103 sub hasResource {	Line 2812 sub hasResource {
my $map = shift;	my $map = shift;
my $filterFunc = shift;	my $filterFunc = shift;
my $recursive = shift;	my $recursive = shift;
	my $showall = shift;

return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1)) > 0;	return scalar($self->retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0;
	}

	sub usedVersion {
	my $self = shift;
	my $linkurl = shift;
	return $self->navhash("version_$linkurl");
}	}

1;	1;

package Apache::lonnavmaps::iterator;	package Apache::lonnavmaps::iterator;
	use Scalar::Util qw(weaken);
	use Apache::lonnet;

=pod	=pod

Line 2168 new branch. The possible tokens are:	Line 2886 new branch. The possible tokens are:

=over 4	=over 4

=item * BEGIN_MAP:	=item * B<END_ITERATOR>:

	The iterator has returned all that it's going to. Further calls to the
	iterator will just produce more of these. This is a "false" value, and
	is the only false value the iterator which will be returned, so it can
	be used as a loop sentinel.

	=item * B<BEGIN_MAP>:

A new map is being recursed into. This is returned I<after> the map	A new map is being recursed into. This is returned I<after> the map
resource itself is returned.	resource itself is returned.

=item * END_MAP:	=item * B<END_MAP>:

The map is now done.	The map is now done.

=item * BEGIN_BRANCH:	=item * B<BEGIN_BRANCH>:

A branch is now starting. The next resource returned will be the first	A branch is now starting. The next resource returned will be the first
in that branch.	in that branch.

=item * END_BRANCH:	=item * B<END_BRANCH>:

The branch is now done.	The branch is now done.

Line 2200 but only one resource will be returned.	Line 2925 but only one resource will be returned.

=back	=back

	=head2 Normal Usage

	Normal usage of the iterator object is to do the following:

	my $it = $navmap->getIterator([your params here]);
	my $curRes;
	while ($curRes = $it->next()) {
	[your logic here]
	}

	Note that inside of the loop, it's frequently useful to check if
	"$curRes" is a reference or not with the reference function; only
	resource objects will be references, and any non-references will
	be the tokens described above.

	Also note there is some old code floating around that trys to track
	the depth of the iterator to see when it's done; do not copy that
	code. It is difficult to get right and harder to understand then
	this. They should be migrated to this new style.

=cut	=cut

# Here are the tokens for the iterator:	# Here are the tokens for the iterator:

	sub END_ITERATOR { return 0; }
sub BEGIN_MAP { return 1; } # begining of a new map	sub BEGIN_MAP { return 1; } # begining of a new map
sub END_MAP { return 2; } # end of the map	sub END_MAP { return 2; } # end of the map
sub BEGIN_BRANCH { return 3; } # beginning of a branch	sub BEGIN_BRANCH { return 3; } # beginning of a branch
Line 2216 sub min {	Line 2962 sub min {
if ($a < $b) { return $a; } else { return $b; }	if ($a < $b) { return $a; } else { return $b; }
}	}

# In the CVS repository, documentation of this algorithm is included
# in /doc/lonnavdocs, as a PDF and .tex source. Markers like 1
# will reference the same location in the text as the part of the
# algorithm is running through.

sub new {	sub new {
# magic invocation to create a class instance	# magic invocation to create a class instance
my $proto = shift;	my $proto = shift;
my $class = ref($proto) \|\| $proto;	my $class = ref($proto) \|\| $proto;
my $self = {};	my $self = {};

$self->{NAV_MAP} = shift;	weaken($self->{NAV_MAP} = shift);
return undef unless ($self->{NAV_MAP});	return undef unless ($self->{NAV_MAP});

# Handle the parameters	# Handle the parameters
Line 2276 sub new {	Line 3017 sub new {
# that isn't just a redirector.	# that isn't just a redirector.
my $resource; my $resourceCount = 0;	my $resource; my $resourceCount = 0;

	# Documentation on this algorithm can be found in the CVS repository at
	# /docs/lonnavdocs; these "#" markers correspond to documentation
	# in that file.
# 1	# 1

foreach my $pass (@iterations) {	foreach my $pass (@iterations) {
Line 2291 sub new {	Line 3035 sub new {

# prime the recursion	# prime the recursion
$self->{$firstResourceName}->{DATA}->{$valName} = 0;	$self->{$firstResourceName}->{DATA}->{$valName} = 0;
my $depth = 0;	$iterator->next();
$iterator->next();
my $curRes = $iterator->next();	my $curRes = $iterator->next();
while ($depth > -1) {	my $depth = 1;
if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }	while ($depth > 0) {
if ($curRes == $iterator->END_MAP()) { $depth--; }	if ($curRes == $iterator->BEGIN_MAP()) { $depth++; }
	if ($curRes == $iterator->END_MAP()) { $depth--; }

if (ref($curRes)) {	if (ref($curRes)) {
# If there's only one resource, this will save it	# If there's only one resource, this will save it
# we have to filter empty resources from consideration here,	# we have to filter empty resources from consideration here,
Line 2331 sub new {	Line 3075 sub new {
$curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;	$curRes->{DATA}->{DISPLAY_DEPTH} = $finalDepth;
if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}	if ($finalDepth > $maxDepth) {$maxDepth = $finalDepth;}
}	}
} continue {
$curRes = $iterator->next();	$curRes = $iterator->next();
}	}
}	}

# Check: Was this only one resource, a map?	# Check: Was this only one resource, a map?
if ($resourceCount == 1 && $resource->is_map() && !$self->{FORCE_TOP}) {	if ($resourceCount == 1 && $resource->is_sequence() && !$self->{FORCE_TOP}) {
my $firstResource = $resource->map_start();	my $firstResource = $resource->map_start();
my $finishResource = $resource->map_finish();	my $finishResource = $resource->map_finish();
return	return
Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,	Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
$finishResource, $self->{FILTER},	$finishResource, $self->{FILTER},
$self->{ALREADY_SEEN},	$self->{ALREADY_SEEN},
$self->{CONDITION}, 0);	$self->{CONDITION},
	$self->{FORCE_TOP});

}	}

Line 2353 sub new {	Line 3098 sub new {
$self->{MAX_DEPTH} = $maxDepth;	$self->{MAX_DEPTH} = $maxDepth;
$self->{STACK} = [];	$self->{STACK} = [];
$self->{RECURSIVE_ITERATOR_FLAG} = 0;	$self->{RECURSIVE_ITERATOR_FLAG} = 0;
	$self->{FINISHED} = 0; # When true, the iterator has finished

for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {	for (my $i = 0; $i <= $self->{MAX_DEPTH}; $i++) {
push @{$self->{STACK}}, [];	push @{$self->{STACK}}, [];
Line 2369 sub new {	Line 3115 sub new {

sub next {	sub next {
my $self = shift;	my $self = shift;
	my $closeAllPages=shift;
	if ($self->{FINISHED}) {
	return END_ITERATOR();
	}

# If we want to return the top-level map object, and haven't yet,	# If we want to return the top-level map object, and haven't yet,
# do so.	# do so.
Line 2379 sub next {	Line 3129 sub next {

if ($self->{RECURSIVE_ITERATOR_FLAG}) {	if ($self->{RECURSIVE_ITERATOR_FLAG}) {
# grab the next from the recursive iterator	# grab the next from the recursive iterator
my $next = $self->{RECURSIVE_ITERATOR}->next();	my $next = $self->{RECURSIVE_ITERATOR}->next($closeAllPages);

# is it a begin or end map? If so, update the depth	# is it a begin or end map? If so, update the depth
if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }	if ($next == BEGIN_MAP() ) { $self->{RECURSIVE_DEPTH}++; }
Line 2429 sub next {	Line 3179 sub next {
$self->{CURRENT_DEPTH}--;	$self->{CURRENT_DEPTH}--;
return END_BRANCH();	return END_BRANCH();
} else {	} else {
	$self->{FINISHED} = 1;
return END_MAP();	return END_MAP();
}	}
}	}
Line 2492 sub next {	Line 3243 sub next {

# That ends the main iterator logic. Now, do we want to recurse	# That ends the main iterator logic. Now, do we want to recurse
# down this map (if this resource is a map)?	# down this map (if this resource is a map)?
if ($self->{HERE}->is_map() &&	if ( ($self->{HERE}->is_sequence() \|\| (!$closeAllPages && $self->{HERE}->is_page())) &&
(defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {	(defined($self->{FILTER}->{$self->{HERE}->map_pc()}) xor $self->{CONDITION})) {
$self->{RECURSIVE_ITERATOR_FLAG} = 1;	$self->{RECURSIVE_ITERATOR_FLAG} = 1;
my $firstResource = $self->{HERE}->map_start();	my $firstResource = $self->{HERE}->map_start();
Line 2501 sub next {	Line 3252 sub next {
$self->{RECURSIVE_ITERATOR} =	$self->{RECURSIVE_ITERATOR} =
Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,	Apache::lonnavmaps::iterator->new($self->{NAV_MAP}, $firstResource,
$finishResource, $self->{FILTER},	$finishResource, $self->{FILTER},
$self->{ALREADY_SEEN}, $self->{CONDITION});	$self->{ALREADY_SEEN},
	$self->{CONDITION},
	$self->{FORCE_TOP});
}	}

# If this is a blank resource, don't actually return it.	# If this is a blank resource, don't actually return it.
Line 2510 sub next {	Line 3263 sub next {
my $browsePriv = $self->{HERE}->browsePriv();	my $browsePriv = $self->{HERE}->browsePriv();
if (!$self->{HERE}->src() \|\|	if (!$self->{HERE}->src() \|\|
(!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {	(!($browsePriv eq 'F') && !($browsePriv eq '2')) ) {
return $self->next();	return $self->next($closeAllPages);
}	}

return $self->{HERE};	return $self->{HERE};
Line 2554 sub populateStack {	Line 3307 sub populateStack {
1;	1;

package Apache::lonnavmaps::DFSiterator;	package Apache::lonnavmaps::DFSiterator;
	use Scalar::Util qw(weaken);
	use Apache::lonnet;

# Not documented in the perldoc: This is a simple iterator that just walks	# Not documented in the perldoc: This is a simple iterator that just walks
# through the nav map and presents the resources in a depth-first search	# through the nav map and presents the resources in a depth-first search
Line 2562 package Apache::lonnavmaps::DFSiterator;	Line 3317 package Apache::lonnavmaps::DFSiterator;
# useful for pre-processing of some kind, and is in fact used by the main	# useful for pre-processing of some kind, and is in fact used by the main
# iterator that way, but that's about it.	# iterator that way, but that's about it.
# One could imagine merging this into the init routine of the main iterator,	# One could imagine merging this into the init routine of the main iterator,
# but this might as well be left seperate, since it is possible some other	# but this might as well be left separate, since it is possible some other
# use might be found for it. - Jeremy	# use might be found for it. - Jeremy

# Unlike the main iterator, this DOES return all resources, even blank ones.	# Unlike the main iterator, this DOES return all resources, even blank ones.
Line 2582 sub new {	Line 3337 sub new {
my $class = ref($proto) \|\| $proto;	my $class = ref($proto) \|\| $proto;
my $self = {};	my $self = {};

$self->{NAV_MAP} = shift;	weaken($self->{NAV_MAP} = shift);
return undef unless ($self->{NAV_MAP});	return undef unless ($self->{NAV_MAP});

$self->{FIRST_RESOURCE} = shift \|\| $self->{NAV_MAP}->firstResource();	$self->{FIRST_RESOURCE} = shift \|\| $self->{NAV_MAP}->firstResource();
Line 2736 sub populateStack {	Line 3491 sub populateStack {
1;	1;

package Apache::lonnavmaps::resource;	package Apache::lonnavmaps::resource;
	use Scalar::Util qw(weaken);
use Apache::lonnet;	use Apache::lonnet;

=pod	=pod

=head1 Object: resource	=head1 Object: resource

	X<resource, navmap object>
A resource object encapsulates a resource in a resource map, allowing	A resource object encapsulates a resource in a resource map, allowing
easy manipulation of the resource, querying the properties of the	easy manipulation of the resource, querying the properties of the
resource (including user properties), and represents a reference that	resource (including user properties), and represents a reference that
Line 2762 writing, there is no way to override thi	Line 3518 writing, there is no way to override thi
parts will never be returned, nor will their response types or ids be	parts will never be returned, nor will their response types or ids be
stored.	stored.

=head2 Public Members	=head2 Overview

resource objects have a hash called DATA ($resourceRef->{DATA}) that	A B<Resource> is the most granular type of object in LON-CAPA that can
you can store whatever you want in. This allows you to easily do	be included in a course. It can either be a particular resource, like
two-pass algorithms without worrying about managing your own	an HTML page, external resource, problem, etc., or it can be a
resource->data hash.	container sequence, such as a "page" or a "map".

=head2 Methods	To see a sequence from the user's point of view, please see the
	B<Creating a Course: Maps and Sequences> chapter of the Author's
=over 4	Manual.

=item * B<new>($navmapRef, $idString):	A Resource Object, once obtained from a navmap object via a B<getBy*>
	method of the navmap, or from an iterator, allows you to query
The first arg is a reference to the parent navmap object. The second	information about that resource.
is the idString of the resource itself. Very rarely, if ever, called
directly. Use the nav map->getByID() method.	Generally, you do not ever want to create a resource object yourself,
	so creation has been left undocumented. Always retrieve resources
=back	from navmap objects.

	=head3 Identifying Resources

	X<big hash>Every resource is identified by a Resource ID in the big hash that is
	unique to that resource for a given course. X<resource ID, in big hash>
	The Resource ID has the form #.#, where the first number is the same
	for every resource in a map, and the second is unique. For instance,
	for a course laid out like this:

	* Problem 1
	* Map
	* Resource 2
	* Resource 3

	C<Problem 1> and C<Map> will share a first number, and C<Resource 2>
	C<Resource 3> will share a first number. The second number may end up
	re-used between the two groups.

	The resource ID is only used in the big hash, but can be used in the
	context of a course to identify a resource easily. (For instance, the
	printing system uses it to record which resources from a sequence you
	wish to print.)

	X<symb> X<resource, symb>
	All resources also have B<symb>s, which uniquely identify a resource
	in a course. Many internal LON-CAPA functions expect a symb. A symb
	carries along with it the URL of the resource, and the map it appears
	in. Symbs are much larger then resource IDs.

=cut	=cut

Line 2789 sub new {	Line 3573 sub new {
my $class = ref($proto) \|\| $proto;	my $class = ref($proto) \|\| $proto;
my $self = {};	my $self = {};

$self->{NAV_MAP} = shift;	weaken($self->{NAV_MAP} = shift);
$self->{ID} = shift;	$self->{ID} = shift;

# Store this new resource in the parent nav map's cache.	# Store this new resource in the parent nav map's cache.
Line 2818 sub navHash {	Line 3602 sub navHash {

=pod	=pod

B<Metadata Retreival>	=head2 Methods

These are methods that help you retrieve metadata about the resource:	Once you have a resource object, here's what you can do with it:
Method names are based on the fields in the compiled course
representation.	=head3 Attribute Retrieval

	Every resource has certain attributes that can be retrieved and used:

=over 4	=over 4

	=item * B<ID>: Every resource has an ID that is unique for that
	resource in the course it is in. The ID is actually in the hash
	representing the resource, so for a resource object $res, obtain
	it via C<$res->{ID}).

=item * B<compTitle>:	=item * B<compTitle>:

Returns a "composite title", that is equal to $res->title() if the	Returns a "composite title", that is equal to $res->title() if the
Line 2836 resource has a title, and is otherwise t	Line 3627 resource has a title, and is otherwise t

Returns true if the resource is external.	Returns true if the resource is external.

=item * B<goesto>:

Returns the "goesto" value from the compiled nav map. (It is likely
you want to use B<getNext> instead.)

=item * B<kind>:	=item * B<kind>:

Returns the kind of the resource from the compiled nav map.	Returns the kind of the resource from the compiled nav map.
Line 2868 Returns the symb for the resource.	Line 3654 Returns the symb for the resource.

Returns the title of the resource.	Returns the title of the resource.

=item * B<to>:

Returns the "to" value from the compiled nav map. (It is likely you
want to use B<getNext> instead.)

=back	=back

=cut	=cut
Line 2880 want to use B<getNext> instead.)	Line 3661 want to use B<getNext> instead.)
# These info functions can be used directly, as they don't return	# These info functions can be used directly, as they don't return
# resource information.	# resource information.
sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }	sub comesfrom { my $self=shift; return $self->navHash("comesfrom_", 1); }
	sub encrypted { my $self=shift; return $self->navHash("encrypted_", 1); }
sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }	sub ext { my $self=shift; return $self->navHash("ext_", 1) eq 'true:'; }
sub from { my $self=shift; return $self->navHash("from_", 1); }	sub from { my $self=shift; return $self->navHash("from_", 1); }
	# considered private and undocumented
sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }	sub goesto { my $self=shift; return $self->navHash("goesto_", 1); }
sub kind { my $self=shift; return $self->navHash("kind_", 1); }	sub kind { my $self=shift; return $self->navHash("kind_", 1); }
sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }	sub randomout { my $self=shift; return $self->navHash("randomout_", 1); }
sub randompick {	sub randompick {
my $self = shift;	my $self = shift;
return $self->{NAV_MAP}->{PARM_HASH}->{$self->symb .	return $self->parmval('randompick');
'.0.parameter_randompick'};	}
	sub link {
	my $self=shift;
	if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
	return $self->src;
}	}
sub src {	sub src {
my $self=shift;	my $self=shift;
return $self->navHash("src_", 1);	return $self->navHash("src_", 1);
}	}
	sub shown_symb {
	my $self=shift;
	if ($self->encrypted()) {return &Apache::lonenc::encrypted($self->symb());}
	return $self->symb();
	}
	sub id {
	my $self=shift;
	return $self->{ID};
	}
	sub enclosing_map_src {
	my $self=shift;
	(my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
	return $self->navHash('map_id_'.$first);
	}
sub symb {	sub symb {
my $self=shift;	my $self=shift;
(my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;	(my $first, my $second) = $self->{ID} =~ /(\d+).(\d+)/;
my $symbSrc = &Apache::lonnet::declutter($self->src());	my $symbSrc = &Apache::lonnet::declutter($self->src());
return &Apache::lonnet::declutter(	my $symb = &Apache::lonnet::declutter($self->navHash('map_id_'.$first))
$self->navHash('map_id_'.$first))
. '___' . $second . '___' . $symbSrc;	. '___' . $second . '___' . $symbSrc;
	return &Apache::lonnet::symbclean($symb);
	}
	sub wrap_symb {
	my $self = shift;
	return $self->{NAV_MAP}->wrap_symb($self->symb());
}	}
sub title { my $self=shift; return $self->navHash("title_", 1); }	sub title {
	my $self=shift;
	if ($self->{ID} eq '0.0') {
	# If this is the top-level map, return the title of the course
	# since this map can not be titled otherwise.
	return $env{'course.'.$env{'request.course.id'}.'.description'};
	}
	return $self->navHash("title_", 1); }
	# considered private and undocumented
sub to { my $self=shift; return $self->navHash("to_", 1); }	sub to { my $self=shift; return $self->navHash("to_", 1); }
	sub condition {
	my $self=shift;
	my $undercond=$self->navHash("undercond_", 1);
	if (!defined($undercond)) { return 1; };
	my $condid=$self->navHash("condid_$undercond");
	if (!defined($condid)) { return 1; };
	my $condition=&Apache::lonnet::directcondval($condid);
	return $condition;
	}
	sub condval {
	my $self=shift;
	my ($pathname,$filename) =
	&Apache::lonnet::split_uri_for_cond($self->src());

	my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
	/\&\Q$filename\E\:([\d\\|]+)\&/);
	if ($match) {
	return &Apache::lonnet::condval($1);
	}
	return 0;
	}
sub compTitle {	sub compTitle {
my $self = shift;	my $self = shift;
my $title = $self->title();	my $title = $self->title();
Line 2944 Returns true if the resource is a sequen	Line 3778 Returns true if the resource is a sequen

=cut	=cut

	sub hasResource {
	my $self = shift;
	return $self->{NAV_MAP}->hasResource(@_);
	}

	sub retrieveResources {
	my $self = shift;
	return $self->{NAV_MAP}->retrieveResources(@_);
	}

	sub is_exam {
	my ($self,$part) = @_;
	if ($self->parmval('type',$part) eq 'exam') {
	return 1;
	}
	if ($self->src() =~ /\.(exam)$/) {
	return 1;
	}
	return 0;
	}
sub is_html {	sub is_html {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
Line 2957 sub is_page {	Line 3810 sub is_page {
return $self->navHash("is_map_", 1) &&	return $self->navHash("is_map_", 1) &&
$self->navHash("map_type_" . $self->map_pc()) eq 'page';	$self->navHash("map_type_" . $self->map_pc()) eq 'page';
}	}
	sub is_practice {
	my $self=shift;
	my ($part) = @_;
	if ($self->parmval('type',$part) eq 'practice') {
	return 1;
	}
	return 0;
	}
sub is_problem {	sub is_problem {
my $self=shift;	my $self=shift;
my $src = $self->src();	my $src = $self->src();
return ($src =~ /problem$/);	if ($src =~ /\.(problem\|exam\|quiz\|assess\|survey\|form\|library\|task)$/) {
	return !($self->is_practice());
	}
	return 0;
	}
	sub contains_problem {
	my $self=shift;
	if ($self->is_page()) {
	my $hasProblem=$self->hasResource($self,sub { $_[0]->is_problem() },1);
	return $hasProblem;
	}
	return 0;
}	}
sub is_sequence {	sub is_sequence {
my $self=shift;	my $self=shift;
Line 2968 sub is_sequence {	Line 3840 sub is_sequence {
return $self->navHash("is_map_", 1) &&	return $self->navHash("is_map_", 1) &&
$self->navHash("map_type_" . $self->map_pc()) eq 'sequence';	$self->navHash("map_type_" . $self->map_pc()) eq 'sequence';
}	}
	sub is_survey {
	my $self = shift();
	my $part = shift();
	if ($self->parmval('type',$part) eq 'survey') {
	return 1;
	}
	if ($self->src() =~ /\.(survey)$/) {
	return 1;
	}
	return 0;
	}
	sub is_task {
	my $self=shift;
	my $src = $self->src();
	return ($src =~ /\.(task)$/)
	}

	sub is_empty_sequence {
	my $self=shift;
	my $src = $self->src();
	return !$self->is_page() && $self->navHash("is_map_", 1) && !$self->navHash("map_type_" . $self->map_pc());
	}

# Private method: Shells out to the parmval in the nav map, handler parts.	# Private method: Shells out to the parmval in the nav map, handler parts.
sub parmval {	sub parmval {
Line 3078 Get the Client IP/Name Access Control in	Line 3972 Get the Client IP/Name Access Control in

Get the answer-reveal date for the problem.	Get the answer-reveal date for the problem.

	=item * B<awarded>:

	Gets the awarded value for the problem part. Requires genUserData set to
	true when the navmap object was created.

=item * B<duedate>:	=item * B<duedate>:

Get the due date for the problem.	Get the due date for the problem.
Line 3131 sub answerdate {	Line 4030 sub answerdate {
}	}
return $self->parmval("answerdate", $part);	return $self->parmval("answerdate", $part);
}	}
sub awarded { my $self = shift; return $self->queryRestoreHash('awarded', shift); }	sub awarded {
	my $self = shift; my $part = shift;
	$self->{NAV_MAP}->get_user_data();
	if (!defined($part)) { $part = '0'; }
	return $self->{NAV_MAP}->{STUDENT_DATA}->{$self->symb()}->{'resource.'.$part.'.awarded'};
	}
sub duedate {	sub duedate {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
	my $interval=$self->parmval("interval", $part);
	if ($interval) {
	my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);
	if ($first_access) { return ($first_access+$interval); }
	}
return $self->parmval("duedate", $part);	return $self->parmval("duedate", $part);
}	}
	sub handgrade {
	(my $self, my $part) = @_;
	return $self->parmval("handgrade", $part);
	}
sub maxtries {	sub maxtries {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
return $self->parmval("maxtries", $part);	return $self->parmval("maxtries", $part);
Line 3150 sub opendate {	Line 4063 sub opendate {
}	}
sub problemstatus {	sub problemstatus {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
return $self->parmval("problemstatus", $part);	return lc $self->parmval("problemstatus", $part);
}	}
sub sig {	sub sig {
(my $self, my $part) = @_;	(my $self, my $part) = @_;
Line 3172 sub type {	Line 4085 sub type {
}	}
sub weight {	sub weight {
my $self = shift; my $part = shift;	my $self = shift; my $part = shift;
return $self->parmval("weight", $part);	if (!defined($part)) { $part = '0'; }
	return &Apache::lonnet::EXT('resource.'.$part.'.weight',
	$self->symb(), $env{'user.domain'},
	$env{'user.name'},
	$env{'request.course.sec'});
	}
	sub part_display {
	my $self= shift(); my $partID = shift();
	if (! defined($partID)) { $partID = '0'; }
	my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',
	$self->symb);
	if (! defined($display) \|\| $display eq '') {
	$display = $partID;
	}
	return $display;
}	}

# Multiple things need this	# Multiple things need this
Line 3213 Returns a false value if there has been	Line 4140 Returns a false value if there has been
logged in, true if there has. Always returns false if the discussion	logged in, true if there has. Always returns false if the discussion
data was not extracted when the nav map was constructed.	data was not extracted when the nav map was constructed.

	=item * B<last_post_time>:

	Returns a false value if there hasn't been discussion otherwise returns
	unix timestamp of last time a discussion posting (or edit) was made.

	=item * B<unread_discussion>:

	returns in scalar context the count of the number of unread discussion
	postings

	returns in list context both the count of postings and a hash ref
	containing the subjects of all unread postings

=item * B<getFeedback>:	=item * B<getFeedback>:

Gets the feedback for the resource and returns the raw feedback string	Gets the feedback for the resource and returns the raw feedback string
Line 3233 sub hasDiscussion {	Line 4173 sub hasDiscussion {
return $self->{NAV_MAP}->hasDiscussion($self->symb());	return $self->{NAV_MAP}->hasDiscussion($self->symb());
}	}

	sub last_post_time {
	my $self = shift;
	return $self->{NAV_MAP}->last_post_time($self->symb());
	}

	sub unread_discussion {
	my $self = shift;
	return $self->{NAV_MAP}->unread_discussion($self->symb());
	}

sub getFeedback {	sub getFeedback {
my $self = shift;	my $self = shift;
my $source = $self->src();	my $source = $self->src();
Line 3262 Returns the number of parts of the probl	Line 4212 Returns the number of parts of the probl
for single part problems, returns 1. For multipart, it returns the	for single part problems, returns 1. For multipart, it returns the
number of parts in the problem, not including psuedo-part 0.	number of parts in the problem, not including psuedo-part 0.

	=item * B<countResponses>():

	Returns the total number of responses in the problem a student can answer.

	=item * B<responseTypes>():

	Returns a hash whose keys are the response types. The values are the number
	of times each response type is used. This is for the I<entire> problem, not
	just a single part.

=item * B<multipart>():	=item * B<multipart>():

Returns true if the problem is multipart, false otherwise. Use this instead	Returns true if the problem is multipart, false otherwise. Use this instead
Line 3308 sub countParts {	Line 4268 sub countParts {
return scalar(@{$parts}); # + $delta;	return scalar(@{$parts}); # + $delta;
}	}

	sub countResponses {
	my $self = shift;
	my $count;
	foreach my $part (@{$self->parts()}) {
	$count+= scalar($self->responseIds($part));
	}
	return $count;
	}

	sub responseTypes {
	my $self = shift;
	my %responses;
	foreach my $part (@{$self->parts()}) {
	foreach my $responsetype ($self->responseType($part)) {
	$responses{$responsetype}++ if (defined($responsetype));
	}
	}
	return %responses;
	}

sub multipart {	sub multipart {
my $self = shift;	my $self = shift;
return $self->countParts() > 1;	return $self->countParts() > 1;
}	}

	sub singlepart {
	my $self = shift;
	return $self->countParts() == 1;
	}

sub responseType {	sub responseType {
my $self = shift;	my $self = shift;
my $part = shift;	my $part = shift;

$self->extractParts();	$self->extractParts();
return $self->{RESPONSE_TYPE}->{$part};	if (defined($self->{RESPONSE_TYPES}->{$part})) {
	return @{$self->{RESPONSE_TYPES}->{$part}};
	} else {
	return undef;
	}
}	}

sub responseIds {	sub responseIds {
Line 3326 sub responseIds {	Line 4315 sub responseIds {
my $part = shift;	my $part = shift;

$self->extractParts();	$self->extractParts();
return $self->{RESPONSE_IDS}->{$part};	if (defined($self->{RESPONSE_IDS}->{$part})) {
	return @{$self->{RESPONSE_IDS}->{$part}};
	} else {
	return undef;
	}
}	}

# Private function: Extracts the parts information, both part names and	# Private function: Extracts the parts information, both part names and
Line 3343 sub extractParts {	Line 4336 sub extractParts {

# Retrieve part count, if this is a problem	# Retrieve part count, if this is a problem
if ($self->is_problem()) {	if ($self->is_problem()) {
	my $partorder = &Apache::lonnet::metadata($self->src(), 'partorder');
my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');	my $metadata = &Apache::lonnet::metadata($self->src(), 'packages');
if (!$metadata) {
$self->{RESOURCE_ERROR} = 1;
$self->{PARTS} = [];
$self->{PART_TYPE} = {};
return;
}
foreach (split(/\,/,$metadata)) {
if ($_ =~ /^part_(.*)$/) {
my $part = $1;
# This floods the logs if it blows up
if (defined($parts{$part})) {
Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
}

# check to see if part is turned off.

if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {	if ($partorder) {
$parts{$part} = 1;	my @parts;
}	for my $part (split (/,/,$partorder)) {
}	if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
	push @parts, $part;
	$parts{$part} = 1;
	}
	}
	$self->{PARTS} = \@parts;
	} else {
	if (!$metadata) {
	$self->{RESOURCE_ERROR} = 1;
	$self->{PARTS} = [];
	$self->{PART_TYPE} = {};
	return;
	}
	foreach (split(/\,/,$metadata)) {
	if ($_ =~ /^(?:part\|Task)_(.*)$/) {
	my $part = $1;
	# This floods the logs if it blows up
	if (defined($parts{$part})) {
	&Apache::lonnet::logthis("$part multiply defined in metadata for " . $self->symb());
	}

	# check to see if part is turned off.

	if (!Apache::loncommon::check_if_partid_hidden($part, $self->symb())) {
	$parts{$part} = 1;
	}
	}
	}
	my @sortedParts = sort keys %parts;
	$self->{PARTS} = \@sortedParts;
}	}


my @sortedParts = sort keys %parts;
$self->{PARTS} = \@sortedParts;

	# These hashes probably do not need names that end with "Hash"....
my %responseIdHash;	my %responseIdHash;
my %responseTypeHash;	my %responseTypeHash;

Line 3380 sub extractParts {	Line 4386 sub extractParts {
}	}

# Now, the unfortunate thing about this is that parts, part name, and	# Now, the unfortunate thing about this is that parts, part name, and
# response if are delimited by underscores, but both the part	# response id are delimited by underscores, but both the part
# name and response id can themselves have underscores in them.	# name and response id can themselves have underscores in them.
# So we have to use our knowlege of part names to figure out	# So we have to use our knowlege of part names to figure out
# where the part names begin and end, and even then, it is possible	# where the part names begin and end, and even then, it is possible
# to construct ambiguous situations.	# to construct ambiguous situations.
foreach (split /,/, $metadata) {	foreach (split /,/, $metadata) {
if ($_ =~ /^([a-zA-Z]+)response_(.*)/) {	if ($_ =~ /^([a-zA-Z]+)response_(.*)/
	\|\| $_ =~ /^(Task)_(.*)/) {
my $responseType = $1;	my $responseType = $1;
my $partStuff = $2;	my $partStuff = $2;
my $partIdSoFar = '';	my $partIdSoFar = '';
my @partChunks = split /_/, $partStuff;	my @partChunks = split /_/, $partStuff;
my $i = 0;	my $i = 0;

for ($i = 0; $i < scalar(@partChunks); $i++) {	for ($i = 0; $i < scalar(@partChunks); $i++) {
if ($partIdSoFar) { $partIdSoFar .= '_'; }	if ($partIdSoFar) { $partIdSoFar .= '_'; }
$partIdSoFar .= $partChunks[$i];	$partIdSoFar .= $partChunks[$i];
Line 3400 sub extractParts {	Line 4406 sub extractParts {
my @otherChunks = @partChunks[$i+1..$#partChunks];	my @otherChunks = @partChunks[$i+1..$#partChunks];
my $responseId = join('_', @otherChunks);	my $responseId = join('_', @otherChunks);
push @{$responseIdHash{$partIdSoFar}}, $responseId;	push @{$responseIdHash{$partIdSoFar}}, $responseId;
$responseTypeHash{$partIdSoFar} = $responseType;	push @{$responseTypeHash{$partIdSoFar}}, $responseType;
last;
}	}
}	}
}	}
}	}
	my $resorder = &Apache::lonnet::metadata($self->src(),'responseorder');
	#
	# Reorder the arrays in the %responseIdHash and %responseTypeHash
	if ($resorder) {
	my @resorder=split(/,/,$resorder);
	foreach my $part (keys(%responseIdHash)) {
	my $i=0;
	my %resids = map { ($_,$i++) } @{ $responseIdHash{$part} };
	my @neworder;
	foreach my $possibleid (@resorder) {
	if (exists($resids{$possibleid})) {
	push(@neworder,$resids{$possibleid});
	}
	}
	my @ids;
	my @type;
	foreach my $element (@neworder) {
	push (@ids,$responseIdHash{$part}->[$element]);
	push (@type,$responseTypeHash{$part}->[$element]);
	}
	$responseIdHash{$part}=\@ids;
	$responseTypeHash{$part}=\@type;
	}
	}
$self->{RESPONSE_IDS} = \%responseIdHash;	$self->{RESPONSE_IDS} = \%responseIdHash;
$self->{RESPONSE_TYPES} = \%responseTypeHash;	$self->{RESPONSE_TYPES} = \%responseTypeHash;
}	}
Line 3594 sub ATTEMPTED { return 16; }	Line 4622 sub ATTEMPTED { return 16; }

sub getCompletionStatus {	sub getCompletionStatus {
my $self = shift;	my $self = shift;
	my $part = shift;
return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});	return $self->NETWORK_FAILURE if ($self->{NAV_MAP}->{NETWORK_FAILURE});

my $status = $self->queryRestoreHash('solved', shift);	my $status = $self->queryRestoreHash('solved', $part);

# Left as seperate if statements in case we ever do more with this	# Left as separate if statements in case we ever do more with this
if ($status eq 'correct_by_student') {return $self->CORRECT;}	if ($status eq 'correct_by_student') {return $self->CORRECT;}
if ($status eq 'correct_by_override') {return $self->CORRECT_BY_OVERRIDE; }	if ($status eq 'correct_by_scantron') {return $self->CORRECT;}
	if ($status eq 'correct_by_override') {
	return $self->CORRECT_BY_OVERRIDE;
	}
if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }	if ($status eq 'incorrect_attempted') {return $self->INCORRECT; }
if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }	if ($status eq 'incorrect_by_override') {return $self->INCORRECT_BY_OVERRIDE; }
if ($status eq 'excused') {return $self->EXCUSED; }	if ($status eq 'excused') {return $self->EXCUSED; }
Line 3704 An answer has been submitted, but the st	Line 4736 An answer has been submitted, but the st

sub TRIES_LEFT { return 20; }	sub TRIES_LEFT { return 20; }
sub ANSWER_SUBMITTED { return 21; }	sub ANSWER_SUBMITTED { return 21; }
	sub PARTIALLY_CORRECT{ return 22; }

sub status {	sub status {
my $self = shift;	my $self = shift;
Line 3716 sub status {	Line 4749 sub status {
# dimension and 5 entries on the other, which we want to colorize,	# dimension and 5 entries on the other, which we want to colorize,
# plus network failure and "no date data at all".	# plus network failure and "no date data at all".

	#if ($self->{RESOURCE_ERROR}) { return NETWORK_FAILURE; }
if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }	if ($completionStatus == NETWORK_FAILURE) { return NETWORK_FAILURE; }

my $suppressFeedback = lc($self->parmval("problemstatus", $part)) eq 'no';	my $suppressFeedback = $self->problemstatus($part) eq 'no';
	# If there's an answer date and we're past it, don't
	# suppress the feedback; student should know
	if ($self->duedate($part) && $self->duedate($part) < time() &&
	$self->answerdate($part) && $self->answerdate($part) < time()) {
	$suppressFeedback = 0;
	}

# There are a few whole rows we can dispose of:	# There are a few whole rows we can dispose of:
if ($completionStatus == CORRECT \|\|	if ($completionStatus == CORRECT \|\|
$completionStatus == CORRECT_BY_OVERRIDE ) {	$completionStatus == CORRECT_BY_OVERRIDE ) {
return $suppressFeedback? ANSWER_SUBMITTED : CORRECT;	if ( $suppressFeedback ) { return ANSWER_SUBMITTED }
	my $awarded=$self->awarded($part);
	if ($awarded < 1 && $awarded > 0) {
	return PARTIALLY_CORRECT;
	} elsif ($awarded<1) {
	return INCORRECT;
	}
	return CORRECT;
	}

	# If it's WRONG... and not open
	if ( ($completionStatus == INCORRECT \|\|
	$completionStatus == INCORRECT_BY_OVERRIDE)
	&& (!$self->opendate($part) \|\| $self->opendate($part) > time()) ) {
	return INCORRECT;
}	}

if ($completionStatus == ATTEMPTED) {	if ($completionStatus == ATTEMPTED) {
Line 3744 sub status {	Line 4798 sub status {

if ($dateStatus == PAST_DUE_ANSWER_LATER \|\|	if ($dateStatus == PAST_DUE_ANSWER_LATER \|\|
$dateStatus == PAST_DUE_NO_ANSWER ) {	$dateStatus == PAST_DUE_NO_ANSWER ) {
return $dateStatus;	return $suppressFeedback ? ANSWER_SUBMITTED : $dateStatus;
}	}

if ($dateStatus == ANSWER_OPEN) {	if ($dateStatus == ANSWER_OPEN) {
Line 3762 sub status {	Line 4816 sub status {
if ($completionStatus == INCORRECT \|\| $completionStatus == INCORRECT_BY_OVERRIDE) {	if ($completionStatus == INCORRECT \|\| $completionStatus == INCORRECT_BY_OVERRIDE) {
# and there are TRIES LEFT:	# and there are TRIES LEFT:
if ($self->tries($part) < $self->maxtries($part) \|\| !$self->maxtries($part)) {	if ($self->tries($part) < $self->maxtries($part) \|\| !$self->maxtries($part)) {
return TRIES_LEFT;	return $suppressFeedback ? ANSWER_SUBMITTED : TRIES_LEFT;
}	}
return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this	return $suppressFeedback ? ANSWER_SUBMITTED : INCORRECT; # otherwise, return orange; student can't fix this
}	}
Line 3771 sub status {	Line 4825 sub status {
return OPEN;	return OPEN;
}	}

	sub CLOSED { return 23; }
	sub ERROR { return 24; }

	=pod

	B<Simple Status>

	Convenience method B<simpleStatus> provides a "simple status" for the resource.
	"Simple status" corresponds to "which icon is shown on the
	Navmaps". There are six "simple" statuses:

	=over 4

	=item * B<CLOSED>: The problem is currently closed. (No icon shown.)

	=item * B<OPEN>: The problem is open and unattempted.

	=item * B<CORRECT>: The problem is correct for any reason.

	=item * B<INCORRECT>: The problem is incorrect and can still be
	completed successfully.

	=item * B<ATTEMPTED>: The problem has been attempted, but the student
	does not know if they are correct. (The ellipsis icon.)

	=item * B<ERROR>: There is an error retrieving information about this
	problem.

	=back

	=cut

	# This hash maps the composite status to this simple status, and
	# can be used directly, if you like
	my %compositeToSimple =
	(
	NETWORK_FAILURE() => ERROR,
	NOTHING_SET() => CLOSED,
	CORRECT() => CORRECT,
	PARTIALLY_CORRECT() => PARTIALLY_CORRECT,
	EXCUSED() => CORRECT,
	PAST_DUE_NO_ANSWER() => INCORRECT,
	PAST_DUE_ANSWER_LATER() => INCORRECT,
	ANSWER_OPEN() => INCORRECT,
	OPEN_LATER() => CLOSED,
	TRIES_LEFT() => OPEN,
	INCORRECT() => INCORRECT,
	OPEN() => OPEN,
	ATTEMPTED() => ATTEMPTED,
	ANSWER_SUBMITTED() => ATTEMPTED
	);

	sub simpleStatus {
	my $self = shift;
	my $part = shift;
	my $status = $self->status($part);
	return $compositeToSimple{$status};
	}

	=pod

	B<simpleStatusCount> will return an array reference containing, in
	this order, the number of OPEN, CLOSED, CORRECT, INCORRECT, ATTEMPTED,
	and ERROR parts the given problem has.

	=cut

	# This maps the status to the slot we want to increment
	my %statusToSlotMap =
	(
	OPEN() => 0,
	CLOSED() => 1,
	CORRECT() => 2,
	INCORRECT() => 3,
	ATTEMPTED() => 4,
	ERROR() => 5
	);

	sub statusToSlot { return $statusToSlotMap{shift()}; }

	sub simpleStatusCount {
	my $self = shift;

	my @counts = (0, 0, 0, 0, 0, 0, 0);
	foreach my $part (@{$self->parts()}) {
	$counts[$statusToSlotMap{$self->simpleStatus($part)}]++;
	}

	return \@counts;
	}

=pod	=pod

B<Completable>	B<Completable>
Line 3802 sub completable {	Line 4947 sub completable {
# "If any of the parts are open, or have tries left (implies open),	# "If any of the parts are open, or have tries left (implies open),
# and it is not "attempted" (manually graded problem), it is	# and it is not "attempted" (manually graded problem), it is
# not "complete"	# not "complete"
if (!(($status == OPEN() \|\| $status == TRIES_LEFT())	if ($self->getCompletionStatus($part) == ATTEMPTED() \|\|
&& $self->getCompletionStatus($part) != ATTEMPTED()	$status == ANSWER_SUBMITTED() ) {
&& $status != ANSWER_SUBMITTED())) {	# did this part already, as well as we can
return 0;	next;
}	}
	if ($status == OPEN() \|\| $status == TRIES_LEFT()) {
	return 1;
	}
}	}

# If all the parts were complete, so was this problem.	# If all the parts were complete, so was this problem.
return 1;	return 0;
}	}

=pod	=pod
Line 3837 sub getNext {	Line 4985 sub getNext {
my $to = $self->to();	my $to = $self->to();
foreach my $branch ( split(/,/, $to) ) {	foreach my $branch ( split(/,/, $to) ) {
my $choice = $self->{NAV_MAP}->getById($branch);	my $choice = $self->{NAV_MAP}->getById($branch);
	#if (!$choice->condition()) { next; }
my $next = $choice->goesto();	my $next = $choice->goesto();
$next = $self->{NAV_MAP}->getById($next);	$next = $self->{NAV_MAP}->getById($next);

Line 3865 sub browsePriv {	Line 5014 sub browsePriv {
return $self->{BROWSE_PRIV};	return $self->{BROWSE_PRIV};
}	}

$self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre', $self->src());	$self->{BROWSE_PRIV} = &Apache::lonnet::allowed('bre',$self->src(),
	$self->symb());
}	}

=pod	=pod

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.207
changed lines
	Added in v.1.374