--- loncom/publisher/lonretrieve.pm	2004/03/11 22:45:06	1.24
+++ loncom/publisher/lonretrieve.pm	2006/09/13 21:43:26	1.31
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler to retrieve an old version of a file
 #
-# $Id: lonretrieve.pm,v 1.24 2004/03/11 22:45:06 albertel Exp $
+# $Id: lonretrieve.pm,v 1.31 2006/09/13 21:43:26 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -26,20 +26,6 @@
 # http://www.lon-capa.org/
 #
 #
-# (Publication Handler
-# 
-# (TeX Content Handler
-#
-# YEAR=2000
-# 05/29/00,05/30,10/11 Gerd Kortemeyer)
-#
-# 11/28,11/29,11/30,12/01,12/02,12/04,12/23 Gerd Kortemeyer
-# YEAR=2001
-# 03/23 Guy Albertelli
-# 03/24,03/29 Gerd Kortemeyer)
-#
-# 03/31,04/03,05/02,05/09,06/23,08/20 Gerd Kortemeyer
-#
 ###
 
 package Apache::lonretrieve;
@@ -51,6 +37,7 @@ use Apache::Constants qw(:common :http :
 use Apache::loncacc;
 use Apache::loncommon();
 use Apache::lonlocal;
+use Apache::lonnet;
 
 # ------------------------------------ Interface for selecting previous version
 sub phaseone {
@@ -64,85 +51,110 @@ sub phaseone {
     my $resdir=$resfn;
     $resdir=~s/\/[^\/]+$/\//;
 
-    $fn=~/\/([^\/]+)\.(\w+)$/;
-    my $main=$1;
-    my $suffix=$2;
-
+    my ($main,$suffix,$is_meta) = &get_file_info($fn);
+    
     if (-e $resfn) {  
     $r->print('<form action=/adm/retrieve method=post>'.
 	      '<input type=hidden name=filename value="/~'.$uname.$fn.'">'.
               '<input type=hidden name=phase value=two>'.
               '<table border=2><tr><th>'.&mt('Select').'</th><th>'.
 	      &mt('Version').'</th>'.
-              '<th>'.&mt('Became this version on ...').'</th>'.
-              '<th>'.&mt('Metadata').'</th></tr>');
-    my $filename;
+              '<th>'.&mt('Published on ...').'</th>');
+    if (!$is_meta) {
+	$r->print('<th>'.&mt('Metadata').'</th>');
+    }
+    if ($is_meta
+	|| &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
+	$r->print('<th>'.&mt('Diffs').'</th>');
+    }
+    $r->print('</tr>');
+    
     opendir(DIR,$resdir);
-    while ($filename=readdir(DIR)) {
+    my @files = grep(/^\Q$main\E\.(\d+)\.\Q$suffix\E$/,readdir(DIR));
+    @files = sort {
+	my ($aver) = ($a=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/);
+	my ($bver) = ($b=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/);
+	return $aver <=> $bver;
+    } (@files);
+    closedir(DIR);
+
+    foreach my $filename (@files) {
         if ($filename=~/^\Q$main\E\.(\d+)\.\Q$suffix\E$/) {
 	   my $version=$1;
-           my ($rdev,$rino,$rmode,$rnlink,
-                $ruid,$rgid,$rrdev,$rsize,
-                $ratime,$rmtime,$rctime,
-                $rblksize,$rblocks)=stat($resdir.'/'.$filename);
+           my $rmtime=&Apache::lonnet::metadata($resdir.'/'.$filename,'lastrevisiondate');
            $r->print('<tr><td><input type=radio name=version value="'.
-                     $version.'"></td><th>'.$version.'</th><td>'.
-                     localtime($rmtime).'</td><td>'.
-                     '<a href="'.$urldir.$filename.'.meta" target=cat>'.
-                     &mt('Metadata Version').' '.$version.'</a>');
-           if (&Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
+                     $version.'"></td><td>'.&mt('Previously published version').' '.$version.'</td><td>'.
+                     localtime($rmtime).'</td>');
+		     
+	   if (!$is_meta) {
+	       $r->print('<td><a href="'.$urldir.$filename.'.meta" target=cat>'.
+			 &mt('Metadata Version').' '.$version.'</a></td>');
+	   }
+           if ($is_meta
+	       || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
                $r->print(
-                    '&nbsp;&nbsp;<a target=cat href="/adm/diff?filename=/~'.
+                    '<td><a target=cat href="/adm/diff?filename=/~'.
                         $uname.$fn.
                         '&versiontwo=priv&versionone='.$version.
-                        '">'.&mt('Diffs with Version').' '.$version.'</a>');
+			 '">'.&mt('Diffs with Version').' '.$version.
+			 '</a></td>');
            }
-           $r->print('</a></td></tr>');
+           $r->print('</tr>');
         }
     }
     closedir(DIR);
-    my ($rdev,$rino,$rmode,$rnlink,
-        $ruid,$rgid,$rrdev,$rsize,
-        $ratime,$rmtime,$rctime,
-        $rblksize,$rblocks)=stat($resfn);
+    my $rmtime=&Apache::lonnet::metadata($resfn,'lastrevisiondate');
     $r->print('<tr><td><input type=radio name=version value="new"></td>'.
-              '<th>'.&mt('Current').'</th><td>'.localtime($rmtime).
-           '</td><td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
-              &mt('Metadata current version').'</a>');           
-           if (&Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
+              '<th>'.&mt('Currently published version').'</th><td>'.localtime($rmtime).
+           '</td>');
+    if (!$is_meta) {
+	$r->print('<td><a href="'.$urldir.$main.'.'.$suffix.'.meta" target=cat>'.
+		  &mt('Metadata current version').'</a></td>');           
+    }
+           if ($is_meta 
+	       || &Apache::loncommon::fileembstyle($suffix) eq 'ssi') {
                $r->print(
-                    '&nbsp;&nbsp;<a target=cat href="/adm/diff?filename=/~'.
+                    '<td><a target=cat href="/adm/diff?filename=/~'.
                         $uname.$fn.
                         '&versiontwo=priv'.
-                        '">'.&mt('Diffs with current Version').'</a>');
+                        '">'.&mt('Diffs with current Version').'</a></td>');
            }
-           $r->print('</td></tr></table><p>'.
+           $r->print('</tr></table><p>'.
            '<font size=+1 color=red>'.
 &mt('Retrieval of an old version will overwrite the file currently in construction space').'</font><p>'.
            '<input type=submit value="'.&mt('Retrieve version').'"></form>');
 } else {
     $r->print('<h3>'.&mt('No previous versions published.').'</h3>');
 }
+    $r->print('<p><a href="/priv/'.$uname.$fn.'">'.&mt('Back to').' '.$fn.
+	      '</a></p>'); 
 }
 
 # ---------------------------------- Interface for presenting specified version
 sub phasetwo {
     my ($r,$fn,$uname,$udom)=@_;
-    if ($ENV{'form.version'}) {
-        my $version=$ENV{'form.version'};
+    if ($env{'form.version'}) {
+        my $version=$env{'form.version'};
 	if ($version eq 'new') {
 	    $r->print('<h3>'.&mt('Retrieving current (most recent) version').'</h3>');
         } else {
             $r->print('<h3>'.&mt('Retrieving old version').' '.$version.'</h3>');
         }
+	my ($main,$suffix,$is_meta) = &get_file_info($fn);
+
         my $logfile;
         my $ctarget='/home/'.$uname.'/public_html'.$fn;
         my $vfn=$fn;
         if ($version ne 'new') {
-	    $vfn=~s/\.(\w+)$/\.$version\.$1/;
+	    $vfn=~s/\.(\Q$suffix\E)$/\.$version\.$1/;
         }
+
         my $csource=$r->dir_config('lonDocRoot').'/res/'.$udom.'/'.$uname.$vfn;
-        unless ($logfile=Apache::File->new('>>'.$ctarget.'.log')) {
+
+	my $logname = $ctarget;
+	if ($is_meta) { $logname =~ s/\.meta$//; }
+	$logname = $ctarget.'.log';
+        unless ($logfile=Apache::File->new('>>'.$logname)) {
 	  $r->print(
          '<font color=red>'.&mt('No write permission to user directory, FAIL').'</font>');
         }
@@ -150,7 +162,7 @@ sub phasetwo {
 "\n\n================= Retrieve ".localtime()." ================\n".
 "Version: $version\nSource: $csource\nTarget: $ctarget\n";
         $r->print('<p>'.&mt('Copying file').': ');
-        if (copy($csource,$ctarget)) {
+	if (copy($csource,$ctarget)) {
 	    $r->print('ok<p>');
             print $logfile "Copied sucessfully.\n\n";
         } else {
@@ -167,6 +179,18 @@ sub phasetwo {
     }
 }
 
+sub get_file_info {
+    my ($fn) = @_;
+    my ($main,$suffix) = ($fn=~/\/([^\/]+)\.(\w+)$/);
+    my $is_meta=0;
+    if ($suffix eq 'meta') {
+	$is_meta = 1;
+	($main,$suffix) = ($main=~/(.+)\.(\w+)$/);	    
+	$suffix .= '.meta';
+    }
+    return ($main,$suffix,$is_meta);
+}
+
 # ---------------------------------------------------------------- Main Handler
 sub handler {
 
@@ -180,17 +204,17 @@ sub handler {
   &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
 					  ['filename']);
 
-  if ($ENV{'form.filename'}) {
-      $fn=$ENV{'form.filename'};
+  if ($env{'form.filename'}) {
+      $fn=$env{'form.filename'};
       $fn=~s/^http\:\/\/[^\/]+//;
   } else {
-     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
+     $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
          ' unspecified filename for retrieval', $r->filename); 
      return HTTP_NOT_FOUND;
   }
 
   unless ($fn) { 
-     $r->log_reason($ENV{'user.name'}.' at '.$ENV{'user.domain'}.
+     $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
          ' trying to retrieve non-existing file', $r->filename); 
      return HTTP_NOT_FOUND;
   } 
@@ -203,7 +227,7 @@ sub handler {
     &Apache::loncacc::constructaccess($fn,$r->dir_config('lonDefDomain'));
   unless (($uname) && ($udom)) {
      $r->log_reason($uname.' at '.$udom.
-         ' trying to publish file '.$ENV{'form.filename'}.
+         ' trying to publish file '.$env{'form.filename'}.
          ' ('.$fn.') - not authorized', 
          $r->filename); 
      return HTTP_NOT_ACCEPTABLE;
@@ -214,27 +238,25 @@ sub handler {
   &Apache::loncommon::content_type($r,'text/html');
   $r->send_http_header;
 
-  $r->print('<html><head><title>LON-CAPA Construction Space</title></head>');
-
-  $r->print(&Apache::loncommon::bodytag('Retrieve Published Resources'));
+  $r->print(&Apache::loncommon::start_page('Retrieve Published Resources'));
 
   
   $r->print('<h1>'.&mt('Retrieve previous versions of').' <tt>'.$fn.'</tt></h1>');
   
-  if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})) {
+  if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
           $r->print('<h3><font color=red>'.&mt('Co-Author').': '.$uname.
 		    &mt(' at ').$udom.
                '</font></h3>');
   }
 
 
-  if ($ENV{'form.phase'} eq 'two') {
+  if ($env{'form.phase'} eq 'two') {
       &phasetwo($r,$fn,$uname,$udom);
   } else {
       &phaseone($r,$fn,$uname,$udom);
   }
 
-  $r->print('</body></html>');
+  $r->print(&Apache::loncommon::end_page());
   return OK;  
 }