version 1.1, 2000/10/16 20:47:39
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version 1.8, 2002/05/23 10:19:30
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# |
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# Sequence Handler |
# Sequence Handler |
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# |
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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 |
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# (TeX Content Handler |
# (TeX Content Handler |
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# |
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# 10/16 Gerd Kortemeyer |
# 10/16 Gerd Kortemeyer |
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package Apache::lonambiguous; |
package Apache::lonsequence; |
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use strict; |
use strict; |
use Apache::lonnet; |
use Apache::lonnet; |
use Apache::Constants qw(:common 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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# ----------------------------------------------------------- Could not resolve |
# ----------------------------------------------------------- Could not resolve |
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Line 28 sub getlost {
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Line 53 sub getlost {
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$r->send_http_header; |
$r->send_http_header; |
$r->print( |
$r->print( |
'<head><title>Unknown Error</title></head><body bgcolor="#FFFFFF"><h1>'. |
'<head><title>Unknown Error</title></head><body bgcolor="#FFFFFF"><h1>'. |
'LON-CAPA</h1>Could not handle ambiguous resource reference.<p>'.$errmsg. |
'LON-CAPA</h1>Could not handle sequence resource reference.<p>'.$errmsg. |
'</body></html>'); |
'</body></html>'); |
} |
} |
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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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# ---------------------------------------------------------------- View Handler |
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sub viewmap { |
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my ($r,$url,$adv,$errtext)=@_; |
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$r->print('<html>'); |
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if ($ENV{'form.forceselect'}) { $r->print(<<ENDSCRIPT); |
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<script> |
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function select_group() { |
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window.location="/adm/groupsort?catalogmode=groupimport&mode=rat&acts="+document.forms.fileattr.acts.value; |
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} |
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function queue(val) { |
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if (eval("document.forms."+val+".filelink.checked")) { |
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var l=val.length; |
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var v=val.substring(4,l); |
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document.forms.fileattr.acts.value+='1a'+v+'b'; |
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} |
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else { |
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var l=val.length; |
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var v=val.substring(4,l); |
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document.forms.fileattr.acts.value+='0a'+v+'b'; |
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} |
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} |
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</script> |
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ENDSCRIPT |
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} |
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$r->print('<body bgcolor="#FFFFFF">'.&buttons($adv)); |
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if ($ENV{'form.forceselect'}) { $r->print(<<ENDSELECT); |
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<form name=fileattr><input type=hidden name=acts value=''> |
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<input type="button" name="close" value='CLOSE' onClick="self.close()"> |
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<input type="button" name="groupimport" value='GROUP IMPORT' |
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onClick="javascript:select_group()"> |
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</form> |
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ENDSELECT |
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} |
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if ($errtext) { |
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$r->print($errtext.'<hr>'); |
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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 ($ENV{'form.forceselect'}) { |
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$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) { $title='<i>Empty</i>'; } |
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if ($url) { |
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if ($ENV{'form.forceselect'}) { |
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$r->print(<<ENDCHECKBOX); |
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<input type='checkbox' name='filelink' |
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value='$url' onClick='javascript:queue("form$idx")' > |
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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) { $r->print('</a>'); } |
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if ($ENV{'form.forceselect'}) { |
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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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$r->print('</body></html>'); |
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} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
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sub handler { |
sub handler { |
Line 42 sub handler {
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Line 156 sub handler {
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$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']); |
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my %hash; |
my %bighash; |
my %bighash; |
# ----------------------------------------------------------------- Tie db file |
my $requrl=$r->uri; |
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# ------------------------------------------------------------ Tie symb db file |
if ($ENV{'request.course.fn'}) { |
if ($ENV{'request.course.fn'}) { |
my $envkey; |
my $last; |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
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&GDBM_READER,0640)) { |
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$last=$hash{'last_direction'}; |
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untie(%hash); |
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} |
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my $direction=''; |
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my $prevmap=''; |
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if ($last) { |
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($prevmap,$direction)=(split(/\_\_\_/,$last)); |
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} |
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# ------------------------------------------------------------- Tie big db file |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER,0640)) { |
foreach $envkey (keys %ENV) { |
my $disid=''; |
if ($envkey=~/^form\.(\d+)\.(\d+)$/) { |
my $whatend=''; |
my $mapid=$1; |
if ($direction eq 'back') { |
my $resid=$2; |
$disid=$bighash{'map_finish_'.$requrl}; |
my $resurl=$bighash{'src_'.$mapid.'.'.$resid}; |
$whatend='End'; |
&Apache::lonnet::symblist($bighash{'map_id_'.$mapid}, |
} else { |
$resurl => $resid); |
$disid=$bighash{'map_start_'.$requrl}; |
$r->header_out(Location => |
$whatend='Beginning'; |
'http://'.$ENV{'HTTP_HOST'}.$resurl); |
} |
return REDIRECT; |
my $disurl=''; |
} |
my $dismapid=''; |
} |
if ($disid) { |
untie(%bighash); |
$disurl=$bighash{'src_'.$disid}; |
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$dismapid=(split(/\./,$disid))[1]; |
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} |
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my $symb=''; |
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my $sequencetitle=''; |
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unless($disurl) { |
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if ($symb=&Apache::lonnet::symbread()) { |
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my ($mapurl,$mapid)=split(/\_\_\_/,$symb); |
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$sequencetitle=$bighash{'title_'. |
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$bighash{'map_pc_/res/'.$mapurl}.'.'. |
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$mapid}; |
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} |
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} |
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# --------------------------------------- Untie hash, make sure to come by here |
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untie(%bighash); |
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if ($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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$r->content_type('text/html'); |
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$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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$r->print(<<ENDSYMB); |
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<html><body bgcolor="#FFFFFF"> |
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<h2>$whatend of</h2> |
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<h1>$sequencetitle</h1> |
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</body></html> |
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ENDSYMB |
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return OK |
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} |
} else { |
} else { |
&getlost($r,'Could not access course structure.'); |
&getlost($r,'Could not access course structure.'); |
return OK; |
return OK; |
Line 72 sub handler {
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Line 239 sub handler {
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} |
} |
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return OK; |
return OK; |
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# ================================================================= TRASH BELOW |
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# ---------------------------------------------------------- Do we have a case? |
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my $thisfn; |
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unless (($thisfn=$ENV{'request.ambiguous'})&&($ENV{'request.course.fn'})) { |
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&getlost($r,'Could not find information on resource.'); |
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return OK; |
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} |
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# ---------------------------------- Should this file have been part of a page? |
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$thisfn=&Apache::lonnet::declutter($thisfn); |
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my %hash; |
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my $syval=''; |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
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&GDBM_READER,0640)) { |
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$syval=$hash{$thisfn}; |
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untie(%hash); |
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} |
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# ---------------------------------------------------------- There was an entry |
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if ($syval) { |
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if ($syval=~/\_$/) { |
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# ----------------------------------- Okay, this should have appeared on a page |
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$syval=~s/\_\_\_$//; |
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$r->content_type('text/html'); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.'/res/'.$syval); |
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return REDIRECT; |
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} else { |
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# There is not really a problem (???), but cannot go back without endless loop |
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&getlost($r,'The nature of the problem is unclear'); |
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return OK; |
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} |
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} |
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# ------------------------------------------------ Would be standalone resource |
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if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
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&GDBM_READER,0640)) { |
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# ---------------------------------------------- Get ID(s) for current resource |
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my $ids=$bighash{'ids_/res/'.$thisfn}; |
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if ($ids) { |
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# ------------------------------------------------------------------- Has ID(s) |
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my @possibilities=split(/\,/,$ids); |
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my $couldbe=''; |
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map { |
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if (&Apache::lonnet::allowed('bre',$bighash{'src_'.$_})) { |
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if ($couldbe) { |
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$couldbe.=','.$_; |
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} else { |
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$couldbe=$_; |
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} |
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} |
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} @possibilities; |
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if ($couldbe) { |
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@possibilities=split(/\,/,$couldbe); |
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if ($#possibilities>0) { |
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# ----------------------------------------------- Okay, really multiple choices |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print(<<ENDSTART); |
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<head><title>Choose Location</title></head> |
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<body bgcolor="#FFFFFF"> |
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<h1>LON-CAPA</h1> |
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The resource you had been accessing appears more than once in this course, |
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and LON-CAPA has insufficient session information to determine which instance |
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of the resource you meant. |
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<p> |
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Please click on the instance of the resource you intended to access: |
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<p> |
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<form action="/adm/ambiguous" method=post> |
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<input type=hidden name=orgurl value="$thisfn"> |
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<input type=hidden name=selecturl value=1> |
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<table border=2> |
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<tr><th> </th><th>Title</th><th>Type</th><th>Part of ...</th></tr> |
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ENDSTART |
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map { |
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my $mapurl=$bighash{'map_id_'.(split(/\./,$_))[0]}; |
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$r->print('<tr><td><input type=submit value=Select name="'. |
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$_.'"></td><td>'.$bighash{'title_'.$_}. |
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'</td><td>'.$bighash{'type_'.$_}. |
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'</td><td><a href="'.$mapurl.'">'.$mapurl. |
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'</a></td></tr>'); |
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} @possibilities; |
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$r->print('</table></form></body></html>'); |
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untie(%bighash); |
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return OK; |
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} |
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} |
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} |
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untie(%bighash); |
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} |
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# ------------------------------------ This handler should not have been called |
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&getlost($r,'Invalid call of handler'); |
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return OK; |
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} |
} |
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1; |
1; |