version 1.6, 2000/10/11 21:16:29
|
version 1.37, 2003/03/08 01:39:29
|
Line 2
|
Line 2
|
# |
# |
# Page flip handler |
# Page flip handler |
# |
# |
|
# $Id$ |
|
# |
|
# Copyright Michigan State University Board of Trustees |
|
# |
|
# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
|
# |
|
# LON-CAPA is free software; you can redistribute it and/or modify |
|
# it under the terms of the GNU General Public License as published by |
|
# the Free Software Foundation; either version 2 of the License, or |
|
# (at your option) any later version. |
|
# |
|
# LON-CAPA is distributed in the hope that it will be useful, |
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
# GNU General Public License for more details. |
|
# |
|
# You should have received a copy of the GNU General Public License |
|
# along with LON-CAPA; if not, write to the Free Software |
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|
# |
|
# /home/httpd/html/adm/gpl.txt |
|
# |
|
# http://www.lon-capa.org/ |
|
# |
# (Page Handler |
# (Page Handler |
# |
# |
# (TeX Content Handler |
# (TeX Content Handler |
Line 10
|
Line 34
|
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, |
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, |
# 10/02 Gerd Kortemeyer) |
# 10/02 Gerd Kortemeyer) |
# |
# |
# 10/03,10/05,10/06,10/07,10/09,10/10,10/11 Gerd Kortemeyer |
# 10/03,10/05,10/06,10/07,10/09,10/10,10/11,10/16,10/17, |
|
# 11/14,11/16, |
|
# 10/01/01,05/01,05/28,07/05 Gerd Kortemeyer |
|
|
package Apache::lonpageflip; |
package Apache::lonpageflip; |
|
|
Line 24 use GDBM_File;
|
Line 50 use GDBM_File;
|
|
|
my %hash; |
my %hash; |
|
|
|
sub cleanup { |
|
if (tied(%hash)){ |
|
&Apache::lonnet::logthis('Cleanup pageflip: hash'); |
|
unless (untie(%hash)) { |
|
&Apache::lonnet::logthis('Failed cleanup pageflip: hash'); |
|
} |
|
} |
|
} |
|
|
sub addrid { |
sub addrid { |
my ($current,$new,$condid)=@_; |
my ($current,$new,$condid)=@_; |
unless ($condid) { $condid=0; } |
unless ($condid) { $condid=0; } |
if (&Apache::lonnet::allowed('bre',$hash{'src_'.$new})) { |
|
if ($current) { |
if ($current) { |
$current.=','.$new; |
$current.=','.$new; |
} else { |
} else { |
$current=''.$new; |
$current=''.$new; |
} |
} |
} |
|
return $current; |
return $current; |
} |
} |
|
|
# ================================================================ Main Handler |
sub fullmove { |
|
my ($rid,$mapurl,$direction)=@_; |
|
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
|
&GDBM_READER(),0640)) { |
|
($rid,$mapurl)=&move($rid,$mapurl,$direction); |
|
untie(%hash); |
|
} |
|
return($rid,$mapurl); |
|
} |
|
|
sub handler { |
sub move { |
my $r=shift; |
my ($rid,$mapurl,$direction)=@_; |
|
my $startoutrid=$rid; |
|
|
# ------------------------------------------- Set document type for header only |
my $next=''; |
|
|
if ($r->header_only) { |
|
$r->content_type('text/html'); |
|
$r->send_http_header; |
|
return OK; |
|
} |
|
|
|
my %cachehash=(); |
|
my $multichoice=0; |
|
my %multichoicehash=(); |
|
my $redirecturl=''; |
|
my $next=''; |
|
my @possibilities=(); |
|
|
|
if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { |
|
$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
|
my $direction=$1; |
|
my $currenturl=$2; |
|
$currenturl=~s/^http\:\/\///; |
|
$currenturl=~s/^[^\/]+//; |
|
# ------------------------------------------- Do we have any idea where we are? |
|
my $position; |
|
if ($position=Apache::lonnet::symbread($currenturl)) { |
|
# ------------------------------------------------------------------------- Yes |
|
my ($mapurl,$mapnum,$thisurl)=split(/\_\_\_/,$position); |
|
$cachehash{$thisurl}=$mapnum; |
|
# ============================================================ Tie the big hash |
|
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
|
&GDBM_READER,0640)) { |
|
my $rid=$hash{'map_pc_/res/'.$mapurl}.'.'.$mapnum; |
|
my $next=''; |
|
my $mincond=1; |
my $mincond=1; |
my $posnext=''; |
my $posnext=''; |
if ($direction eq 'forward') { |
if ($direction eq 'forward') { |
# --------------------------------------------------------------------- Forward |
# --------------------------------------------------------------------- Forward |
|
while ($hash{'type_'.$rid} eq 'finish') { |
|
$rid=$hash{'ids_'.$hash{'map_id_'.(split(/\./,$rid))[0]}}; |
|
} |
map { |
map { |
my $thiscond= |
my $thiscond= |
&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
Line 97 sub handler {
|
Line 114 sub handler {
|
$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
} |
} |
} split(/\,/,$posnext); |
} split(/\,/,$posnext); |
|
if ($hash{'is_map_'.$next}) { |
|
# This jumps to the beginning of a new map (going down level) |
|
if ( |
|
$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { |
|
$mapurl=$hash{'src_'.$next}; |
|
$next=$hash{'map_start_'.$hash{'src_'.$next}}; |
|
} |
|
} elsif |
|
((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) { |
|
# This comes up from a map (coming up one level); |
|
$mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; |
|
} |
} elsif ($direction eq 'back') { |
} elsif ($direction eq 'back') { |
# ------------------------------------------------------------------- Backwards |
# ------------------------------------------------------------------- Backwards |
|
while ($hash{'type_'.$rid} eq 'start') { |
|
$rid=$hash{'ids_'.$hash{'map_id_'.(split(/\./,$rid))[0]}}; |
|
} |
map { |
map { |
my $thiscond= |
my $thiscond= |
&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
Line 118 sub handler {
|
Line 150 sub handler {
|
$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
} |
} |
} split(/\,/,$posnext); |
} split(/\,/,$posnext); |
} elsif ($direction eq 'up') { |
if ($hash{'is_map_'.$next}) { |
# -------------------------------------------------------------------------- Up |
# This jumps to the end of a new map (going down one level) |
} elsif ($direction eq 'down') { |
if ( |
# ------------------------------------------------------------------------ Down |
$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { |
|
$mapurl=$hash{'src_'.$next}; |
|
$next=$hash{'map_finish_'.$hash{'src_'.$next}}; |
|
} |
|
} elsif |
|
((split(/\./,$startoutrid))[0]!=(split(/\./,$next))[0]) { |
|
# This comes back up from a map (going up one level); |
|
$mapurl=$hash{'map_id_'.(split(/\./,$next))[0]}; |
|
} |
|
} |
|
return ($next,$mapurl); |
|
} |
|
|
|
# ================================================================ Main Handler |
|
|
|
sub handler { |
|
my $r=shift; |
|
|
|
# ------------------------------------------- Set document type for header only |
|
|
|
if ($r->header_only) { |
|
$r->content_type('text/html'); |
|
$r->send_http_header; |
|
return OK; |
|
} |
|
|
|
my %cachehash=(); |
|
my $multichoice=0; |
|
my %multichoicehash=(); |
|
my $redirecturl=''; |
|
my $next=''; |
|
my @possibilities=(); |
|
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['postdata']); |
|
if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { |
|
$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
|
my $direction=$1; |
|
my $currenturl=$2; |
|
if ($direction eq 'return') { |
|
# -------------------------------------------------------- Return to last known |
|
my $last; |
|
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
|
&GDBM_READER(),0640)) { |
|
$last=$hash{'last_known'}; |
|
untie(%hash); |
|
} |
|
my $newloc; |
|
if (($last) && (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
|
&GDBM_READER(),0640))) { |
|
my ($murl,$fn)=split(/\_\_\_/,$last); |
|
my $id; |
|
($murl,$id,$fn)=split(/\_\_\_/,&Apache::lonnet::symbread($fn)); |
|
$newloc=$hash{'src_'. |
|
$hash{'map_pc_'.&Apache::lonnet::clutter($murl)}.'.'.$id}; |
|
unless ($newloc) { $newloc='/adm/noidea.html'; } |
|
untie %hash; |
|
} else { |
|
$newloc='/adm/noidea.html'; |
|
} |
|
$r->content_type('text/html'); |
|
$r->header_out(Location => |
|
'http://'.$ENV{'HTTP_HOST'}.$newloc); |
|
|
|
return REDIRECT; |
|
} |
|
$currenturl=~s/^http\:\/\///; |
|
$currenturl=~s/^[^\/]+//; |
|
# |
|
# Is the current URL on the map? If not, start with last known URL |
|
# |
|
unless (&Apache::lonnet::is_on_map($currenturl)) { |
|
my $last; |
|
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
|
&GDBM_READER(),0640)) { |
|
$last=$hash{'last_known'}; |
|
untie(%hash); |
|
} |
|
if ($last) { |
|
$currenturl=&Apache::lonnet::clutter((split(/\_\_\_/,$last))[1]); |
|
} else { |
|
$r->content_type('text/html'); |
|
$r->header_out(Location => |
|
'http://'.$ENV{'HTTP_HOST'}.'/adm/noidea.html'); |
|
return REDIRECT; |
|
} |
|
} |
|
# ------------------------------------------- Do we have any idea where we are? |
|
my $position; |
|
if ($position=Apache::lonnet::symbread($currenturl)) { |
|
# ------------------------------------------------------------------------- Yes |
|
my ($startoutmap,$mapnum,$thisurl)=split(/\_\_\_/,$position); |
|
$cachehash{$startoutmap}{$thisurl}=$mapnum; |
|
$cachehash{$startoutmap}{'last_known'}= |
|
&Apache::lonnet::declutter($currenturl); |
|
|
|
# ============================================================ Tie the big hash |
|
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
|
&GDBM_READER(),0640)) { |
|
my $rid=$hash{'map_pc_'.&Apache::lonnet::clutter($startoutmap)}. |
|
'.'.$mapnum; |
|
|
|
# ------------------------------------------------- Move forward, backward, etc |
|
my $endupmap; |
|
($next,$endupmap)=&move($rid,$startoutmap,$direction); |
|
# -------------------------------------- Do we have one and only one empty URL? |
|
my $safecount=0; |
|
while (($next) && ($next!~/\,/) && |
|
((!$hash{'src_'.$next}) || ($hash{'randomout_'.$next})) |
|
&& ($safecount<10000)) { |
|
($next,$endupmap)=&move($next,$endupmap,$direction); |
|
$safecount++; |
} |
} |
|
# We are now at at least one non-empty URL |
# ----------------------------------------------------- Check out possibilities |
# ----------------------------------------------------- Check out possibilities |
if ($next) { |
if ($next) { |
@possibilities=split(/\,/,$next); |
@possibilities=split(/\,/,$next); |
if ($#possibilities==0) { |
if ($#possibilities==0) { |
# ---------------------------------------------- Only one possibility, redirect |
# ---------------------------------------------- Only one possibility, redirect |
$redirecturl=$hash{'src_'.$next}; |
$redirecturl=$hash{'src_'.$next}; |
$cachehash{&Apache::lonnet::declutter($redirecturl)} |
$cachehash{$endupmap} |
|
{&Apache::lonnet::declutter($redirecturl)} |
=(split(/\./,$next))[1]; |
=(split(/\./,$next))[1]; |
} else { |
} else { |
# ------------------------ There are multiple possibilities for a next resource |
# ------------------------ There are multiple possibilities for a next resource |
Line 138 sub handler {
|
Line 281 sub handler {
|
$multichoicehash{'src_'.$_}=$hash{'src_'.$_}; |
$multichoicehash{'src_'.$_}=$hash{'src_'.$_}; |
$multichoicehash{'title_'.$_}=$hash{'title_'.$_}; |
$multichoicehash{'title_'.$_}=$hash{'title_'.$_}; |
$multichoicehash{'type_'.$_}=$hash{'type_'.$_}; |
$multichoicehash{'type_'.$_}=$hash{'type_'.$_}; |
|
(my $first, my $second) = $_ =~ /(\d+).(\d+)/; |
|
my $symbSrc = Apache::lonnet::declutter($hash{'src_'.$_}); |
|
$multichoicehash{'symb_'.$_} = |
|
Apache::lonnet::declutter($hash{'map_id_'.$first}.'___'. |
|
$second.'___'.$symbSrc); |
|
|
|
my ($choicemap,$choiceres)=split(/\./,$_); |
$cachehash |
$cachehash |
{&Apache::lonnet::declutter( |
{&Apache::lonnet::declutter($hash{'src_'.$choicemap})} |
|
{&Apache::lonnet::declutter( |
$multichoicehash |
$multichoicehash |
{'src_'.$_} |
{'src_'.$_} |
)} |
)} |
=(split(/\./,$_))[1]; |
=$choiceres; |
} @possibilities; |
} @possibilities; |
} |
} |
} else { |
} else { |
Line 153 sub handler {
|
Line 304 sub handler {
|
# ----------------- The program must come past this point to untie the big hash |
# ----------------- The program must come past this point to untie the big hash |
untie(%hash); |
untie(%hash); |
# --------------------------------------------------------- Store position info |
# --------------------------------------------------------- Store position info |
$cachehash{'last_direction'}=$direction; |
$cachehash{$startoutmap}{'last_direction'}=$direction; |
&Apache::lonnet::symblist($mapurl,%cachehash); |
foreach my $thismap (keys %cachehash) { |
|
&Apache::lonnet::symblist($thismap,%{$cachehash{$thismap}}); |
|
} |
# ============================================== Do not return before this line |
# ============================================== Do not return before this line |
if ($redirecturl) { |
if ($redirecturl) { |
# ----------------------------------------------------- There is a URL to go to |
# ----------------------------------------------------- There is a URL to go to |
|
# ------------------------------------------------- Check for critical messages |
|
if ((time-$ENV{'user.criticalcheck.time'})>300) { |
|
my @what=&Apache::lonnet::dump |
|
('critical',$ENV{'user.domain'}, |
|
$ENV{'user.name'}); |
|
if ($what[0]) { |
|
if (($what[0] ne 'con_lost') && |
|
($what[0]!~/^error\:/)) { |
|
$redirecturl='/adm/email?critical=display'; |
|
} |
|
} |
|
&Apache::lonnet::appenv('user.criticalcheck.time'=>time); |
|
} |
|
|
$r->content_type('text/html'); |
$r->content_type('text/html'); |
$r->header_out(Location => |
$r->header_out(Location => |
'http://'.$ENV{'HTTP_HOST'}.$redirecturl); |
'http://'.$ENV{'HTTP_HOST'}.$redirecturl); |
return REDIRECT; |
return REDIRECT; |
} else { |
} else { |
# --------------------------------------------------------- There was a problem |
# --------------------------------------------------------- There was a problem |
} |
$r->content_type('text/html'); |
|
$r->send_http_header; |
|
if ($#possibilities>0) { |
|
my $bodytag= |
|
&Apache::loncommon::bodytag('Multiple Resources'); |
|
$r->print(<<ENDSTART); |
|
<head><title>Choose Next Location</title></head> |
|
$bodytag |
|
<h3>There are several possibilities of where to go next</h3> |
|
<p> |
|
Please click on the the resource you intend to access: |
|
<p> |
|
<table border=2> |
|
<tr><th>Title</th><th>Type</th></tr> |
|
ENDSTART |
|
foreach (@possibilities) { |
|
$r->print( |
|
'<tr><td><a href="'. |
|
$multichoicehash{'src_'.$_}.'?symb=' . |
|
Apache::lonnet::escape($multichoicehash{'symb_'.$_}).'">'. |
|
$multichoicehash{'title_'.$_}. |
|
'</a></td><td>'.$multichoicehash{'type_'.$_}. |
|
'</td></tr>'); |
|
} |
|
$r->print('</table></body></html>'); |
|
return OK; |
|
} else { |
|
my $bodytag=&Apache::loncommon::bodytag('No Resource'); |
|
$r->print(<<ENDNONE); |
|
<head><title>No Resource</title></head> |
|
$bodytag |
|
<h3>Next resource could not be identified.</h3> |
|
<p>You probably are at the <b>beginning</b> or the <b>end</b> of the |
|
course.</p> |
|
<ul> |
|
<li><a href="/adm/flip?postdata=return:">Go Back</a></li> |
|
<li><a href="/adm/navmaps">Navigate Course Content</a></li> |
|
</ul> |
|
</body> |
|
</html> |
|
ENDNONE |
|
return OK; |
|
} |
|
} |
} else { |
} else { |
# ------------------------------------------------- Problem, could not tie hash |
# ------------------------------------------------- Problem, could not tie hash |
$ENV{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing"; |
$ENV{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing"; |