version 1.4, 2000/10/09 19:37:35
|
version 1.29, 2002/08/18 21:45:41
|
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 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 27 my %hash;
|
Line 53 my %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.':'.$condid; |
$current.=','.$new; |
} else { |
} else { |
$current=''.$new.':'.$condid; |
$current=''.$new; |
} |
} |
} |
|
return $current; |
return $current; |
} |
} |
|
|
|
sub fullmove { |
|
my ($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 move { |
|
my ($rid,$mapurl,$direction)=@_; |
|
my $startoutrid=$rid; |
|
|
|
my $next=''; |
|
|
|
my $mincond=1; |
|
my $posnext=''; |
|
if ($direction eq 'forward') { |
|
# --------------------------------------------------------------------- Forward |
|
if ($hash{'type_'.$rid} eq 'finish') { |
|
$rid=$hash{'ids_'.&Apache::lonnet::clutter($mapurl)}; |
|
} |
|
map { |
|
my $thiscond= |
|
&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
|
if ($thiscond>=$mincond) { |
|
if ($posnext) { |
|
$posnext.=','.$_.':'.$thiscond; |
|
} else { |
|
$posnext=$_.':'.$thiscond; |
|
} |
|
if ($thiscond>$mincond) { $mincond=$thiscond; } |
|
} |
|
} split(/\,/,$hash{'to_'.$rid}); |
|
map { |
|
my ($linkid,$condval)=split(/\:/,$_); |
|
if ($condval>=$mincond) { |
|
$next=&addrid($next,$hash{'goesto_'.$linkid}, |
|
$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
|
} |
|
} split(/\,/,$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') { |
|
# ------------------------------------------------------------------- Backwards |
|
if ($hash{'type_'.$rid} eq 'start') { |
|
$rid=$hash{'ids_'.&Apache::lonnet::clutter($mapurl)}; |
|
} |
|
map { |
|
my $thiscond= |
|
&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
|
if ($thiscond>=$mincond) { |
|
if ($posnext) { |
|
$posnext.=','.$_.':'.$thiscond; |
|
} else { |
|
$posnext=$_.':'.$thiscond; |
|
} |
|
if ($thiscond>$mincond) { $mincond=$thiscond; } |
|
} |
|
} split(/\,/,$hash{'from_'.$rid}); |
|
map { |
|
my ($linkid,$condval)=split(/\:/,$_); |
|
if ($condval>=$mincond) { |
|
$next=&addrid($next,$hash{'comesfrom_'.$linkid}, |
|
$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
|
} |
|
} split(/\,/,$posnext); |
|
if ($hash{'is_map_'.$next}) { |
|
# This jumps to the end of a new map (going down one level) |
|
if ( |
|
$hash{'map_type_'.$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 |
# ================================================================ Main Handler |
|
|
sub handler { |
sub handler { |
Line 50 sub handler {
|
Line 170 sub handler {
|
return OK; |
return OK; |
} |
} |
|
|
my %cachehash=(); |
my %cachehash=(); |
|
my $multichoice=0; |
|
my %multichoicehash=(); |
my $redirecturl=''; |
my $redirecturl=''; |
my $next=''; |
my $next=''; |
my @possibilities=(); |
my @possibilities=(); |
|
|
if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { |
if (($ENV{'form.postdata'})&&($ENV{'request.course.fn'})) { |
$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
my $direction=$1; |
my $direction=$1; |
my $currenturl=$2; |
my $currenturl=$2; |
my $redirecturl=$currenturl; |
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) { |
|
$newloc=&Apache::lonnet::clutter((split(/\_\_\_/,$last))[1]); |
|
} 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/^http\:\/\///; |
$currenturl=~s/^[^\/]+//; |
$currenturl=~s/^[^\/]+//; |
|
unless (($currenturl=~/^\/res\//) || |
|
($currenturl=~/^\/adm\/wrapper\//)) { |
|
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? |
# ------------------------------------------- Do we have any idea where we are? |
my $position; |
my $position; |
if ($position=Apache::lonnet::symbread($currenturl)) { |
if ($position=Apache::lonnet::symbread($currenturl)) { |
# ------------------------------------------------------------------------- Yes |
# ------------------------------------------------------------------------- Yes |
my ($mapurl,$mapnum,$thisurl)=split(/\_\_\_/,$position); |
my ($startoutmap,$mapnum,$thisurl)=split(/\_\_\_/,$position); |
$cachehash{$thisurl}=$mapnum; |
$cachehash{$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', |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
my $rid=$hash{'map_pc_/res/'.$mapurl}.'.'.$mapnum; |
my $rid=$hash{'map_pc_'.&Apache::lonnet::clutter($startoutmap)}. |
my $next=''; |
'.'.$mapnum; |
if ($direction eq 'forward') { |
|
map { |
# ------------------------------------------------- Move forward, backward, etc |
$next=&addrid($next,$hash{'goesto_'.$_}, |
my $endupmap; |
$hash{'condid_'.$hash{'undercond_'.$_}}); |
($next,$endupmap)=&move($rid,$startoutmap,$direction); |
} split(/\,/,$hash{'to_'.$rid}); |
# -------------------------------------- Do we have one and only one empty URL? |
} elsif ($direction eq 'back') { |
my $safecount=0; |
map { |
while (($next) && ($next!~/\,/) && |
$next=&addrid($next,$hash{'comesfrom_'.$_}, |
((!$hash{'src_'.$next}) || ($hash{'randomout_'.$next})) |
$hash{'condid_'.$hash{'undercond_'.$_}}); |
&& ($safecount<10000)) { |
} split(/\,/,$hash{'from_'.$rid}); |
($next,$endupmap)=&move($next,$endupmap,$direction); |
} elsif ($direction eq 'up') { |
$safecount++; |
} elsif ($direction eq 'down') { |
|
} |
} |
my $redirectid=''; |
# We are now at at least one non-empty URL |
# ----------------------------------------------------- Check out possibilities |
# ----------------------------------------------------- Check out possibilities |
if ($next) { |
if ($next) { |
@possibilities=split(/\,/,$next); |
@possibilities=split(/\,/,$next); |
if ($#possibilities==0) { |
if ($#possibilities==0) { |
$redirectid=(split(/\:/,$next))[0]; |
# ---------------------------------------------- Only one possibility, redirect |
|
$redirecturl=$hash{'src_'.$next}; |
|
$cachehash{$endupmap} |
|
{&Apache::lonnet::declutter($redirecturl)} |
|
=(split(/\./,$next))[1]; |
} else { |
} else { |
|
# ------------------------ There are multiple possibilities for a next resource |
|
$multichoice=1; |
|
map { |
|
$multichoicehash{'src_'.$_}=$hash{'src_'.$_}; |
|
$multichoicehash{'title_'.$_}=$hash{'title_'.$_}; |
|
$multichoicehash{'type_'.$_}=$hash{'type_'.$_}; |
|
my ($choicemap,$choiceres)=split(/\./,$_); |
|
$cachehash |
|
{&Apache::lonnet::declutter($hash{'src_'.$choicemap})} |
|
{&Apache::lonnet::declutter( |
|
$multichoicehash |
|
{'src_'.$_} |
|
)} |
|
=$choiceres; |
|
} @possibilities; |
} |
} |
} |
} else { |
if ($redirectid) { |
# -------------------------------------------------------------- No place to go |
$redirecturl=$hash{'src_'.$redirectid}; |
$multichoice=-1; |
} |
} |
|
# ----------------- The program must come past this point to untie the big hash |
untie(%hash); |
untie(%hash); |
|
# --------------------------------------------------------- Store position info |
|
$cachehash{$startoutmap}{'last_direction'}=$direction; |
|
foreach my $thismap (keys %cachehash) { |
|
&Apache::lonnet::symblist($thismap,%{$cachehash{$thismap}}); |
|
} |
|
# ============================================== Do not return before this line |
if ($redirecturl) { |
if ($redirecturl) { |
|
# ----------------------------------------------------- There is a URL to go to |
$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 { |
|
# --------------------------------------------------------- There was a problem |
|
$r->content_type('text/html'); |
|
$r->send_http_header; |
|
if ($#possibilities>0) { |
|
$r->print(<<ENDSTART); |
|
<head><title>Choose Next Location</title></head> |
|
<body bgcolor="#FFFFFF"> |
|
<h1>LON-CAPA</h1> |
|
There are several possibilities of where to go next. |
|
<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="'. |
|
$multichoicehash{'src_'.$_}.'">'. |
|
$multichoicehash{'title_'.$_}. |
|
'</a></td><td>'.$multichoicehash{'type_'.$_}. |
|
'</td></tr>'); |
|
} |
|
$r->print('</table></body></html>'); |
|
return OK; |
|
} else { |
|
$r->print(<<ENDNONE); |
|
<head><title>Choose Next Location</title></head> |
|
<body bgcolor="#FFFFFF"> |
|
<img src="/adm/lonIcons/lonlogos.gif" align=right> |
|
<h1>Sorry!</h1> |
|
<h2>Next resource could not be identified.</h2> |
|
<h3>You probably are at the beginning or the end of the course.</h3> |
|
</body> |
|
</html> |
|
ENDNONE |
|
return OK; |
|
} |
|
} |
|
} else { |
|
# ------------------------------------------------- Problem, could not tie hash |
|
$ENV{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing"; |
|
return HTTP_NOT_ACCEPTABLE; |
} |
} |
|
} else { |
|
# ---------------------------------------- No, could not determine where we are |
|
$r->internal_redirect('/adm/ambiguous'); |
} |
} |
# -------------------------------------------------------- No, could not decide |
|
} |
|
$r->content_type('text/html'); |
|
$r->send_http_header; |
|
|
|
$r->print('<html><body>'); |
|
|
|
# -------------------------- Class was not initialized or page fliped strangely |
|
} else { |
} else { |
|
# -------------------------- Class was not initialized or page fliped strangely |
$ENV{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; |
$ENV{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; |
return HTTP_NOT_ACCEPTABLE; |
return HTTP_NOT_ACCEPTABLE; |
} |
} |
|
|
|
|
|
|
|
|
# ------TRASH BELOW |
|
# --------------------------- TRASH |
|
|
|
$r->print('</body></html>'); |
|
return OK; |
|
|
|
|
|
# ========================================================= TOTAL TRASH |
|
|
|
# &Apache::lonnet::symblist($requrl,%symbhash); |
|
|
|
} |
} |
|
|
1; |
1; |