version 1.3, 2000/10/17 10:36:17
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version 1.17, 2004/05/21 20:16:40
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# |
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# Sequence Handler |
# Sequence Handler |
# |
# |
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# $Id$ |
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# |
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# Copyright Michigan State University Board of Trustees |
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# |
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# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
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# |
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# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
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# |
# (Handler to resolve ambiguous file locations |
# (Handler to resolve ambiguous file locations |
# |
# |
# (TeX Content Handler |
# (TeX Content Handler |
Line 18 use strict;
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Line 42 use strict;
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use Apache::lonnet; |
use Apache::lonnet; |
use Apache::Constants qw(:common :http REDIRECT); |
use Apache::Constants qw(:common :http REDIRECT); |
use GDBM_File; |
use GDBM_File; |
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use Apache::lonratedt; |
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use Apache::lonratsrv; |
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use Apache::lonpageflip; |
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use Apache::loncommon; |
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use Apache::lonlocal; |
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my %selhash; |
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my $successtied; |
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# ----------------------------------------- Attempt to read from resource space |
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sub attemptread { |
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my $fn=shift; |
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&Apache::lonnet::repcopy($fn); |
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if (-e $fn) { |
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return &Apache::lonratedt::attemptread($fn); |
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} else { |
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return (); |
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} |
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} |
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sub mapread { |
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my $fn=shift; |
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&Apache::lonnet::repcopy($fn); |
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if (-e $fn) { |
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return &Apache::lonratedt::mapread($fn,''); |
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} else { |
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return (); |
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} |
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} |
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# ---------------------------------------------------------------- View Handler |
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sub viewmap { |
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my ($r,$url)=@_; |
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$r->print('<html>'); |
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if ($ENV{'form.forceselect'}) { $r->print(<<ENDSCRIPT); |
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<script> |
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# ----------------------------------------------------------- Could not resolve |
function select_group() { |
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window.location="/adm/groupsort?catalogmode=groupsec&mode=rat&acts="+document.forms.fileattr.acts.value; |
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} |
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function queue(val) { |
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if (eval("document.forms."+val+".filelink.checked")) { |
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var l=val.length; |
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var v=val.substring(4,l); |
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document.forms.fileattr.acts.value+='1a'+v+'b'; |
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} |
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else { |
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var l=val.length; |
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var v=val.substring(4,l); |
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document.forms.fileattr.acts.value+='0a'+v+'b'; |
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} |
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} |
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sub getlost { |
</script> |
my ($r,$errmsg)=@_; |
ENDSCRIPT |
$r->content_type('text/html'); |
} |
$r->send_http_header; |
$r->print(&Apache::loncommon::bodytag('Map Contents').'<h1>'.$url.'</h1>'); |
$r->print( |
# ------------------ This is trying to select. Provide buttons and tie %selhash |
'<head><title>Unknown Error</title></head><body bgcolor="#FFFFFF"><h1>'. |
if ($ENV{'form.forceselect'}) { $r->print(<<ENDSELECT); |
'LON-CAPA</h1>Could not handle sequence resource reference.<p>'.$errmsg. |
<form name=fileattr><input type=hidden name=acts value=''> |
'</body></html>'); |
<input type="button" name="close" value='CLOSE' onClick="self.close()"> |
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<input type="button" name="groupimport" value='GROUP IMPORT' |
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onClick="javascript:select_group()"> |
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</form> |
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ENDSELECT |
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my $diropendb = |
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"/home/httpd/perl/tmp/$ENV{'user.domain'}\_$ENV{'user.name'}_groupsec.db"; |
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if (tie(%selhash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) { |
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if ($ENV{'form.launch'} eq '1') { |
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&start_fresh_session(); |
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} |
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$successtied=1; |
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# - Evaluate actions from previous page (both cumulatively and chronologically) |
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if ($ENV{'form.catalogmode'} eq 'groupimport') { |
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my $acts=$ENV{'form.acts'}; |
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my @Acts=split(/b/,$acts); |
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my %ahash; |
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my %achash; |
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my $ac=0; |
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# some initial hashes for working with data |
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foreach (@Acts) { |
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my ($state,$ref)=split(/a/); |
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$ahash{$ref}=$state; |
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$achash{$ref}=$ac; |
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$ac++; |
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} |
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# sorting through the actions and changing the tied database hash |
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foreach (sort {$achash{$a}<=>$achash{$b}} (keys %ahash)) { |
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my $key=$_; |
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if ($ahash{$key} eq '1') { |
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$selhash{'store_'.$selhash{'pre_'.$key.'_link'}}= |
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$selhash{'pre_'.$key.'_title'}; |
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$selhash{'storectr_'.$selhash{'pre_'.$key.'_link'}}= |
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$selhash{'storectr'}+0; |
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$selhash{'storectr'}++; |
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} |
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if ($ahash{$key} eq '0') { |
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if ($selhash{'store_'.$selhash{'pre_'.$key.'_link'}}) { |
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delete $selhash{'store_'.$selhash{'pre_'.$key.'_link'}}; |
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} |
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} |
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} |
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# deleting the previously cached listing |
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foreach (keys %selhash) { |
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if ($_ =~ /^pre_/ && $_ =~/link$/) { |
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my $key = $_; |
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$key =~ s/^pre_//; |
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$key =~ s/_[^_]*$//; |
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delete $selhash{'pre_'.$key.'_title'}; |
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delete $selhash{'pre_'.$key.'_link'}; |
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} |
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} |
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} |
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# - |
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} |
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} |
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# ----------------------------- successtied is now '1' if in working selectmode |
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my ($errtext,$fatal)=&mapread(&Apache::lonnet::filelocation('',$url),''); |
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if ($fatal==1) { |
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$r->print('<p><b><font color="red">'.&mt('Map contents are not shown in order.').'</font></b></p><br />'); |
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} |
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my $idx=0; |
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foreach (&attemptread(&Apache::lonnet::filelocation('',$url))) { |
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if (defined($_)) { |
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$idx++; |
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if ($successtied) { |
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$r->print('<form name="form'.$idx.'">'); |
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} |
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my ($title,$url)=split(/\:/,$_); |
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$title=~s/\&colon\;/\:/g; |
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$url=~s/\&colon\;/\:/g; |
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unless ($title) { $title=(split(/\//,$url))[-1] }; |
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unless ($title) { $title='<i>'.&mt('Empty').'</i>'; } |
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if ($url) { |
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if ($successtied) { |
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my $checked=''; |
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if ($selhash{'store_'.$url}) { |
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$checked=" checked"; |
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} |
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$selhash{"pre_${idx}_link"}=$url; |
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$selhash{"pre_${idx}_title"}=$title; |
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$r->print(<<ENDCHECKBOX); |
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<input type='checkbox' name='filelink' |
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value='$url' onClick='javascript:queue("form$idx")'$checked> |
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<input type='hidden' name='title' value='$title'> |
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ENDCHECKBOX |
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} |
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$r->print('<a href="'.&Apache::lonratsrv::qtescape($url).'">'); |
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} |
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$r->print(&Apache::lonratsrv::qtescape($title)); |
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if ($url) { $r->print('</a>'); } |
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if ($successtied) { |
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$r->print('</form>'); |
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} else { |
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$r->print('<br>'); |
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} |
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} |
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} |
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$r->print('</body></html>'); |
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if ($successtied) { |
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untie %selhash; |
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} |
} |
} |
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# ----------------------------------------------------------- Clean out selhash |
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sub start_fresh_session { |
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foreach (keys %selhash) { |
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if ($_ =~ /^pre_/) { |
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delete $selhash{$_}; |
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} |
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if ($_ =~ /^store/) { |
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delete $selhash{$_}; |
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} |
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} |
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} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
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sub handler { |
sub handler { |
my $r=shift; |
my $r=shift; |
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if ($r->header_only) { |
if ($r->header_only) { |
$r->content_type('text/html'); |
&Apache::loncommon::content_type($r,'text/html'); |
$r->send_http_header; |
$r->send_http_header; |
return OK; |
return OK; |
} |
} |
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&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, |
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['forceselect','launch']); |
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my %hash; |
my %hash; |
my %bighash; |
my %bighash; |
my $requrl=$r->uri; |
my $requrl=$r->uri; |
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$successtied=0; |
# ------------------------------------------------------------ Tie symb db file |
# ------------------------------------------------------------ Tie symb db file |
if ($ENV{'request.course.fn'}) { |
my $disurl=''; |
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my $dismapid=''; |
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if (($ENV{'request.course.fn'}) && (!$ENV{'form.forceselect'})) { |
my $last; |
my $last; |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
$last=$hash{'last_direction'}; |
$last=$hash{'last_direction'}; |
untie(%hash); |
untie(%hash); |
} |
} |
Line 62 sub handler {
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Line 261 sub handler {
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} |
} |
# ------------------------------------------------------------- Tie big db file |
# ------------------------------------------------------------- Tie big db file |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER(),0640)) { |
my $disid=''; |
my $disid=''; |
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my $randomout =''; |
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if ($direction eq 'back') { |
if ($direction eq 'back') { |
$disid=$bighash{'map_finish_'.$requrl}; |
$disid=$bighash{'map_finish_'.$requrl}; |
} else { |
} else { |
$disid=$bighash{'map_start_'.$requrl}; |
$disid=$bighash{'map_start_'.$requrl}; |
} |
} |
my $disurl=''; |
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if ($disid) { |
if ($disid) { |
$disurl=$bighash{'src_'.$disid}; |
$disurl=$bighash{'src_'.$disid}; |
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$dismapid=(split(/\./,$disid))[1]; |
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$randomout = $bighash{'randomout_'.$disid}; |
} |
} |
my $symb=''; |
# ----------- If this is an empty one, or hidden, skip to next non-empty or non-hidden one |
unless($disurl) { |
if ( ((!$disurl) && ($disid)) || ($randomout && $disid) ) { |
if ($symb=&Apache::lonnet::symbread()) { |
$direction=($direction?$direction:'forward'); |
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($disid,$requrl)= |
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&Apache::lonpageflip::fullmove($disid, |
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&Apache::lonnet::declutter($requrl),$direction); |
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if ($disid) { |
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$disurl=$bighash{'src_'.$disid}; |
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$dismapid=(split(/\./,$disid))[1]; |
} |
} |
} |
} |
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# --------------------------------------- Untie hash, make sure to come by here |
# --------------------------------------- Untie hash, make sure to come by here |
untie(%bighash); |
untie(%bighash); |
if ($disurl) { |
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# -------------------------------------------------- Has first or last resource |
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$r->content_type('text/html'); |
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$r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$disurl); |
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return REDIRECT; |
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} else { |
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# ---------- Does not have first or last resource, try to find out where we are |
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unless ($symb) { |
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$r->internal_redirect('/adm/ambiguous'); |
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} |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print(<<ENDSYMB); |
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<html><body> |
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</body></html> |
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ENDSYMB |
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return OK |
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} |
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} else { |
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&getlost($r,'Could not access course structure.'); |
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return OK; |
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} |
} |
} else { |
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$ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; |
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return HTTP_NOT_ACCEPTABLE; |
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} |
} |
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return OK; |
# now either disurl is set (going to first page), or we need another display |
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if ($disurl) { |
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# -------------------------------------------------- Has first or last resource |
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&Apache::lonnet::symblist($requrl,$disurl => $dismapid, |
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'last_known' => &Apache::lonnet::declutter($disurl)); |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$disurl); |
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return REDIRECT; |
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} else { |
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&Apache::loncommon::content_type($r,'text/html'); |
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$r->send_http_header; |
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&viewmap($r,$requrl); |
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return OK; |
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} |
} |
} |
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1; |
1; |