--- rat/lonambiguous.pm 2000/10/16 20:47:39 1.3 +++ rat/lonambiguous.pm 2004/12/20 20:13:03 1.12 @@ -1,6 +1,30 @@ # The LearningOnline Network with CAPA # Handler to resolve ambiguous file locations # +# $Id: lonambiguous.pm,v 1.12 2004/12/20 20:13:03 albertel Exp $ +# +# 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/ +# # (TeX Content Handler # # 05/29/00,05/30,10/11 Gerd Kortemeyer) @@ -13,39 +37,60 @@ use strict; use Apache::lonnet; use Apache::Constants qw(:common REDIRECT); use GDBM_File; +use Apache::loncommon; +use Apache::lonlocal; +my %bighash; + +sub cleanup { + if (tied(%bighash)){ + &Apache::lonnet::logthis('Cleanup ambiguous: bighash'); + unless (untie(%bighash)) { + &Apache::lonnet::logthis('Failed cleanup ambiguous: bighash'); + } + } +} # ----------------------------------------------------------- Could not resolve sub getlost { my ($r,$errmsg)=@_; + $errmsg=&mt($errmsg); $r->content_type('text/html'); $r->send_http_header; $r->print( - 'Unknown Error

'. - 'LON-CAPA

Could not handle ambiguous resource reference.

'.$errmsg. + 'Unknown Error'. + &Apache::loncommon::bodytag('Could not handle ambiguous resource reference'). + $errmsg. ''); } # ================================================================ Main Handler +sub make_symb { + my ($id)=@_; + my ($mapid,$resid)=split(/\./,$id); + my $map=$bighash{'map_id_'.$mapid}; + my $res=$bighash{'src_'.$id}; + my $symb=&Apache::lonnet::encode_symb($map,$resid,$res); + return $symb; +} + sub handler { my $r=shift; if ($r->header_only) { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; return OK; } # ---------------------------------------------------------- Is this selecting? - - my %bighash; - + if ($ENV{'form.selecturl'}) { my $envkey; if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', - &GDBM_READER,0640)) { + &GDBM_READER(),0640)) { foreach $envkey (keys %ENV) { if ($envkey=~/^form\.(\d+)\.(\d+)$/) { # ---------------------------------------------------- Update symb and redirect @@ -82,7 +127,7 @@ sub handler { my $syval=''; if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', - &GDBM_READER,0640)) { + &GDBM_READER(),0640)) { $syval=$hash{$thisfn}; untie(%hash); } @@ -104,57 +149,69 @@ sub handler { return OK; } } - # ------------------------------------------------ Would be standalone resource if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', - &GDBM_READER,0640)) { + &GDBM_READER(),0640)) { # ---------------------------------------------- Get ID(s) for current resource - my $ids=$bighash{'ids_/res/'.$thisfn}; + my $ids=$bighash{'ids_'.&Apache::lonnet::clutter($thisfn)}; if ($ids) { # ------------------------------------------------------------------- Has ID(s) my @possibilities=split(/\,/,$ids); my $couldbe=''; - map { - if (&Apache::lonnet::allowed('bre',$bighash{'src_'.$_})) { + foreach (@possibilities) { + if ($bighash{'encrypted_'.$_}) { next; } + my $symb=&make_symb($_); + if (&Apache::lonnet::allowed('bre',$bighash{'src_'.$_},$symb)) { if ($couldbe) { $couldbe.=','.$_; } else { $couldbe=$_; } } - } @possibilities; + } if ($couldbe) { @possibilities=split(/\,/,$couldbe); + if ($#possibilities==0) { + my $id=$possibilities[0]; + my $resurl=$bighash{'src_'.$id}; + my $mapurl=$bighash{'map_id_'.(split(/\./,$id))[0]}; + my $symb=&make_symb($id); + $r->content_type('text/html'); + &Apache::lonnet::logthis('http://'.$ENV{'HTTP_HOST'}.$resurl.'?symb='.$symb); + $r->header_out(Location => + 'http://'.$ENV{'HTTP_HOST'}.$resurl.'?symb='.$symb); + return REDIRECT; + } if ($#possibilities>0) { # ----------------------------------------------- Okay, really multiple choices $r->content_type('text/html'); $r->send_http_header; + my $bodytag= + &Apache::loncommon::bodytag('Pick Instance of Resource'); $r->print(<Choose Location - -

LON-CAPA

+$bodytag The resource you had been accessing appears more than once in this course, and LON-CAPA has insufficient session information to determine which instance of the resource you meant.

Please click on the instance of the resource you intended to access: -

-

- - - - +

+
 TitleTypePart of ...
+ ENDSTART map { + my $resurl=$bighash{'src_'.$_}; my $mapurl=$bighash{'map_id_'.(split(/\./,$_))[0]}; - $r->print(''); + my $symb=&make_symb($_); + $r->print(''); } @possibilities; - $r->print('
TitlePart of ...
'.$bighash{'title_'.$_}. - ''.$bighash{'type_'.$_}. - ''.$mapurl. - '
'. + &Apache::lonnet::gettitle($symb). + ''. + &Apache::lonnet::gettitle($mapurl).' '. + '
'); + $r->print(''); untie(%bighash); return OK; }