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Part way into phase two

    1: # The LearningOnline Network with CAPA
    2: # Handler to retrieve an old version of a file
    3: #
    4: # (Publication Handler
    5: # 
    6: # (TeX Content Handler
    7: #
    8: # 05/29/00,05/30,10/11 Gerd Kortemeyer)
    9: #
   10: # 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
   11: # 03/23 Guy Albertelli
   12: # 03/24,03/29 Gerd Kortemeyer)
   13: #
   14: # 03/31,04/03 Gerd Kortemeyer
   15: 
   16: package Apache::lonretrieve;
   17: 
   18: use strict;
   19: use Apache::File;
   20: use File::Copy;
   21: use Apache::Constants qw(:common :http :methods);
   22: 
   23: sub phaseone {
   24:     my ($r,$fn,$uname,$udom)=@_;
   25:     my $docroot=$r->dir_config('lonDocRoot');
   26: 
   27:     my $urldir='/res/'.$udom.'/'.$uname.$fn;
   28:     $urldir=~s/\/[^\/]+$/\//;
   29: 
   30:     my $resfn=$docroot.'/res/'.$udom.'/'.$uname.$fn;
   31:     my $resdir=$resfn;
   32:     $resdir=~s/\/[^\/]+$/\//;
   33: 
   34:     $fn=~/^\/(.+)\.(\w+)$/;
   35:     my $main=$1;
   36:     my $suffix=$2;
   37:   
   38:     $r->print('<form action=/adm/retrieve method=post>'.
   39: 	      '<input type=hidden name=filename value="'.$fn.'">'.
   40:               '<input type=hidden name=phase value=two>'.
   41:               '<table border=2><tr><th>Select</th><th>Version</th>'.
   42:               '<th>Became this version on ...</th>'.
   43:               '<th>Metadata</th></tr>');
   44:     my $filename;
   45:     opendir(DIR,$resdir);
   46:     while ($filename=readdir(DIR)) {
   47:         if ($filename=~/^$main\.(\d+)\.$suffix$/) {
   48: 	   my $version=$1;
   49:            my ($rdev,$rino,$rmode,$rnlink,
   50:                 $ruid,$rgid,$rrdev,$rsize,
   51:                 $ratime,$rmtime,$rctime,
   52:                 $rblksize,$rblocks)=stat($resdir.'/'.$filename);
   53:            $r->print('<tr><td><input type=radio name=version value="'.
   54:                      $version.'"></td><th>'.$version.'</th><td>'.
   55:                      localtime($rmtime).'</td><td>'.
   56:                      '<a href="'.$urldir.$filename.'.meta" target=cat>'.
   57:                      'Metadata Version '.$version.'</a></td></tr>');
   58:         }
   59:     }
   60:     closedir(DIR);
   61:     my ($rdev,$rino,$rmode,$rnlink,
   62:         $ruid,$rgid,$rrdev,$rsize,
   63:         $ratime,$rmtime,$rctime,
   64:         $rblksize,$rblocks)=stat($resfn);
   65:     $r->print('<tr><td><input type=radio name=version value="new"></td>'.
   66:               '<th>Current</th><td>'.localtime($rmtime).
   67:            '</td><td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
   68:               'Metadata current version</a></td></tr></table><p>'.
   69:            '<font size=+1 color=red>Retrieval of an old version will '.
   70:            'overwrite the file currently in construction space</font><p>'.
   71:            '<input type=submit value="Retrieve version"></form>');
   72: }
   73: 
   74: sub phasetwo {
   75:     my ($r,$fn,$uname,$udom)=@_;
   76:     if ($ENV{'form.version'}) {
   77:         my $version=$ENV{'form.version'};
   78: 	if ($version eq 'new') {
   79: 	    $r->print('<h3>Retrieving current (most recent) version</h3>');
   80:         } else {
   81:             $r->print('<h3>Retrieving old version '.$version.'</h3>');
   82:         }
   83:         my $logfile;
   84:         my $ctarget='/home/'.$uname.'/public_html'.$fn;
   85:         unless ($logfile=Apache::File->new('>>'.$ctarget.'.log')) {
   86: 	  $r->print(
   87:          '<font color=red>No write permission to user directory, FAIL</font>');
   88:         }
   89:         print $logfile 
   90: "\n\n================= Retrieve ".localtime()." ================\n".
   91: "Version $version\n\n";
   92: 
   93:     } else {
   94:        $r->print(
   95:    '<font size=+1 color=red>Please pick a version to retrieve</font><p>');
   96:        &phaseone($r,$fn,$uname,$udom);
   97:     }
   98: }
   99: 
  100: sub handler {
  101: 
  102:   my $r=shift;
  103: 
  104:   my $fn;
  105: 
  106:   if ($ENV{'form.filename'}) {
  107:       $fn=$ENV{'form.filename'};
  108:       $fn=~s/^http\:\/\/[^\/]+\/\~(\w+)//;
  109:   } else {
  110:      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
  111:          ' unspecified filename for retrieval', $r->filename); 
  112:      return HTTP_NOT_FOUND;
  113:   }
  114: 
  115:   unless ($fn) { 
  116:      $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
  117:          ' trying to retrieve non-existing file', $r->filename); 
  118:      return HTTP_NOT_FOUND;
  119:   } 
  120: 
  121: # ----------------------------------------------------------- Start page output
  122: 
  123:   my $uname=$ENV{'user.name'};
  124:   my $udom=$ENV{'user.domain'};
  125: 
  126:   $r->content_type('text/html');
  127:   $r->send_http_header;
  128: 
  129:   $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
  130: 
  131:   $r->print(
  132:    '<body bgcolor="#FFFFFF"><img align=right src=/adm/lonIcons/lonlogos.gif>');
  133: 
  134:   
  135:   $r->print('<h1>Retrieve previous versions of <tt>'.$fn.'</tt></h1>');
  136: 
  137:   if ($ENV{'form.phase'} eq 'two') {
  138:       &phasetwo($r,$fn,$uname,$udom);
  139:   } else {
  140:       &phaseone($r,$fn,$uname,$udom);
  141:   }
  142: 
  143:   $r->print('</body></html>');
  144:   return OK;  
  145: }