Annotation of loncom/publisher/londiff.pm, revision 1.14

1.1       www         1: # The LearningOnline Network with CAPA
                      2: # Handler to show differences between file versions
                      3: #
1.14    ! www         4: # $Id: londiff.pm,v 1.13 2003/12/10 15:42:49 sakharuk Exp $
1.6       albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: #
1.1       www        29: # (Handler to retrieve an old version of a file
                     30: #
                     31: # (Publication Handler
                     32: # 
                     33: # (TeX Content Handler
                     34: #
                     35: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
                     36: #
                     37: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
                     38: # 03/23 Guy Albertelli
                     39: # 03/24,03/29 Gerd Kortemeyer)
                     40: #
                     41: # 03/31,04/03 Gerd Kortemeyer)
                     42: #
1.5       www        43: # 05/02/01,05/09 Gerd Kortemeyer
1.7       harris41   44: #
                     45: ###
1.1       www        46: 
                     47: package Apache::londiff;
                     48: 
                     49: use strict;
                     50: use Apache::File;
                     51: use File::Copy;
                     52: use Algorithm::Diff qw(diff);
                     53: use Apache::Constants qw(:common :http :methods);
1.5       www        54: use Apache::loncacc;
1.7       harris41   55: use Apache::lonnet();
                     56: use Apache::loncommon();
1.13      sakharuk   57: use Apache::lonlocal;
1.1       www        58: 
                     59: sub handler {
                     60: 
                     61:   my $r=shift;
                     62: 
                     63: # Get query string for limited number of parameters
                     64: 
1.8       stredwic   65:    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                     66:                                        ['filename','versiontwo','versionone']);
1.1       www        67: # Get the files
                     68: 
1.5       www        69:   my $cuname=$ENV{'user.name'};
                     70:   my $cudom=$ENV{'user.domain'};
                     71: 
1.10      www        72:   if ($ENV{'form.filename'}=~/^\/res\//) {
                     73:       ($cudom,$cuname,$ENV{'form.filename'})=
                     74:        ($ENV{'form.filename'}=~/^\/res\/(\w+)\/(\w+)\/(.*)$/);
                     75:   } else {
                     76:    unless (($cuname,$cudom)=
1.5       www        77:     &Apache::loncacc::constructaccess($ENV{'form.filename'},
                     78:                                       $r->dir_config('lonDefDomain'))) {
                     79:      $r->log_reason($cuname.' at '.$cudom.
                     80:          ' trying to get diffs file '.$ENV{'form.filename'}.
                     81:          '  - not authorized', 
                     82:          $r->filename); 
                     83:      return HTTP_NOT_ACCEPTABLE;
1.10      www        84:    }
1.5       www        85:   }
                     86: 
                     87:   my $efn=$ENV{'form.filename'};
                     88: 
                     89:   $efn=~s/\/\~(\w+)//g;
                     90: 
1.1       www        91:   my @f1=();
                     92:   my @f2=();
                     93: 
1.14    ! www        94:   &Apache::loncommon::content_type($r,'text/html');
1.2       www        95:   $r->send_http_header;
                     96: 
                     97:   $r->print('<html><head><title>LON-CAPA Construction Diffs</title></head>');
                     98: 
1.14    ! www        99:   $r->print(&Apache::loncommon::bodytag('Resource Differences'));
1.2       www       100: 
                    101:   
1.13      sakharuk  102:   $r->print('<h1>'.&mt('Compare versions of').' <tt>'.$efn.'</tt></h1>');
1.5       www       103:    
                    104:        if (($cuname ne $ENV{'user.name'}) || ($cudom ne $ENV{'user.domain'})) {
                    105:           $r->print('<h3><font color=red>Co-Author: '.$cuname.' at '.$cudom.
                    106:                '</font></h3>');
                    107:       }
                    108: 
1.2       www       109: 
1.7       harris41  110:  if (&Apache::loncommon::fileembstyle(($efn=~/\.(\w+)$/)) eq
1.2       www       111:       'ssi') {
1.10      www       112:   $r->print('<p><font color="red">');
1.1       www       113:   if ($ENV{'form.versionone'} eq 'priv') {
1.5       www       114:       my $fn='/home/'.$cuname.'/public_html/'.$efn;
1.1       www       115:       if (-e $fn) {
                    116: 	  my $fh=Apache::File->new($fn);
                    117:           my $line;
                    118:           while($line=<$fh>) {
                    119:              chomp($line);
                    120:              $f1[$#f1+1]=$line;
                    121: 	 }
                    122:       }
1.13      sakharuk  123:       $r->print('<b>'.&mt('Construction Space Version').'</b>');
1.1       www       124:   } else {
                    125:       my $fn=
1.5       www       126:        '/home/httpd/html//res/'.$cudom.'/'.$cuname.'/';
1.1       www       127:       if ($ENV{'form.versionone'}) {
1.5       www       128:          my ($main,$suffix)=($efn=~/^(.+)\.(\w+)$/);
1.1       www       129:          $fn.=$main.'.'.$ENV{'form.versionone'}.'.'.$suffix;
1.13      sakharuk  130: 	 $r->print('<b>'.&mt('Version').' '.$ENV{'form.versionone'}.'</b>');
1.1       www       131:       } else {
1.5       www       132:          $fn.=$efn;
1.13      sakharuk  133: 	 $r->print('<b>'.&mt('Current Version').'</b>');
1.1       www       134:       }
                    135:       @f1=split(/\n/,&Apache::lonnet::getfile($fn));      
                    136:   }
                    137: 
1.13      sakharuk  138:   $r->print('</font><br />'.&mt('versus').'<br /><font color="green">');
1.1       www       139: 
                    140:   if ($ENV{'form.versiontwo'} eq 'priv') {
1.5       www       141:       my $fn='/home/'.$cuname.'/public_html/'.$efn;
1.1       www       142:       if (-e $fn) {
                    143: 	  my $fh=Apache::File->new($fn);
                    144:           my $line;
                    145:           while($line=<$fh>) {
                    146:              chomp($line);
                    147:              $f2[$#f2+1]=$line;
                    148: 	 }
                    149:       }
1.13      sakharuk  150:       $r->print('<b>'.&mt('Construction Space Version').'</b>');
1.1       www       151:   } else {
                    152:       my $fn=
1.5       www       153:        '/home/httpd/html/res/'.$cudom.'/'.$cuname.'/';
1.1       www       154:       if ($ENV{'form.versiontwo'}) {
1.5       www       155:          my ($main,$suffix)=($efn=~/^(.+)\.(\w+)$/);
1.1       www       156:          $fn.=$main.'.'.$ENV{'form.versiontwo'}.'.'.$suffix;
1.13      sakharuk  157: 	 $r->print('<b>'.&mt('Version').' '.$ENV{'form.versiontwo'}.'</b>');
1.1       www       158:       } else {
1.5       www       159:          $fn.=$efn;
1.13      sakharuk  160: 	 $r->print('<b>'.&mt('Current Version').'</b>');
1.1       www       161:       }
                    162:       @f2=split(/\n/,&Apache::lonnet::getfile($fn));      
                    163:   }
1.10      www       164:   $r->print('</font></p>');
1.1       www       165: # Run diff
                    166: 
                    167:   my $diffs = diff(\@f1, \@f2);
                    168: 
                    169: # Start page output
                    170: 
                    171:   my $chunk;
                    172:   my $line;
                    173: 
1.3       www       174:   $r->print('<pre>');
                    175: 
1.1       www       176:   foreach $chunk (@$diffs) {
1.3       www       177: 
1.1       www       178:     foreach $line (@$chunk) {
                    179:       my ($sign, $lineno, $text) = @$line;
                    180:       $text=~s/\</\&lt\;/g;
                    181:       $text=~s/\>/\&gt\;/g;
1.3       www       182:       $lineno=substr($lineno.'        ',0,7);
                    183:       $r->print('<font color='.(($sign eq '+')?'green':'red').'>'.
                    184:                 $sign.' '.$lineno.' '.$text."</font>\n");
1.1       www       185:     }
1.3       www       186:     $r->print("<hr>\n");
1.1       www       187:   }
1.3       www       188:   $r->print('</pre>');
1.1       www       189: 
1.2       www       190: } else {
1.13      sakharuk  191:     $r->print('<h1><font color=red>'.&mt('Binary File').'</font></h1>');
1.2       www       192: }
1.13      sakharuk  193:   $r->print('<center><a href="javascript:window.close();">'.&mt('Close This Window').'</a></center></body></html>'); 
1.1       www       194:   return OK;  
                    195: }
                    196: 
                    197: 
                    198: 1;
                    199: __END__
1.2       www       200: 
1.1       www       201: 
                    202: 
                    203: 

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