--- rat/lonratedt.pm	2002/12/06 12:58:11	1.42
+++ rat/lonratedt.pm	2004/01/14 22:47:46	1.52
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Edit Handler for RAT Maps
 #
-# $Id: lonratedt.pm,v 1.42 2002/12/06 12:58:11 www Exp $
+# $Id: lonratedt.pm,v 1.52 2004/01/14 22:47:46 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -32,12 +32,148 @@
 
 package Apache::lonratedt;
 
+=pod
+
+=head1 NAME
+
+Apache::lonratedt: advanced resource assembly tool
+
+=head1 SYNOPSIS
+
+lonratedt provides the routines and the handler for the Advanced
+    Resource Assembly Tool (RAT), and ties the various pieces together
+    with Javascript.
+
+=head1 OVERVIEW
+
+=head2 Map Representation
+
+=begin latex
+
+%
+\begin{figure}
+\begin{center}\includegraphics[%
+  width=0.55\paperwidth,bb = 0 0 200 100, draft, type=eps]{Map_Example}\end{center}
+
+
+\caption{\label{Map_In_Advanced_Editor}Example of a Map in the Advanced Editor}
+\end{figure}
+%
+\begin{figure}
+\begin{lyxcode}
+<map>
+
+~~<resource~id=\char`\"{}1\char`\"{}
+
+~~~~src=\char`\"{}/res/msu/korte/phy231welcome.html\char`\"{}
+
+~~~~type=\char`\"{}start\char`\"{}
+
+~~~~title=\char`\"{}Start\char`\"{}>
+
+~~~~</resource>
+
+~~<resource~id=\char`\"{}2\char`\"{}
+
+~~~~src=\char`\"{}\char`\"{}~type=\char`\"{}finish\char`\"{}
+
+~~~~title=\char`\"{}Finish\char`\"{}>
+
+~~~~</resource>
+
+~~<resource~id=\char`\"{}6\char`\"{}
+
+~~~~src=\char`\"{}/res/msu/korte/tests/units.problem\char`\"{}
+
+~~~~type=\char`\"{}mandatory\char`\"{}
+
+~~~~title=\char`\"{}Physical~Units~Test\char`\"{}>
+
+~~~~</resource>
+
+~~<resource~id=\char`\"{}9\char`\"{}
+
+~~~~src=\char`\"{}/res/msu/korte/chapters/onedim.sequence\char`\"{}
+
+~~~~title=\char`\"{}Motion~in~One~Dimension\char`\"{}>
+
+~~~~</resource>
+
+~~<resource~id=\char`\"{}11\char`\"{}
+
+~~~~src=\char`\"{}/res/msu/bauer/bridges/units.sequence\char`\"{}
+
+~~~~title=\char`\"{}Physical~Units~Refresher\char`\"{}>
+
+~~~~</resource>
+
+~~<condition~id=\char`\"{}19\char`\"{}
+
+~~~~type=\char`\"{}stop\char`\"{}
+
+~~~~value=\char`\"{}user.assessments{[}this./res/msu/korte/tests/units.problem{]}.status=solved\char`\"{}>
+
+~~~~</condition>
+
+~~<link~from=\char`\"{}1\char`\"{}~to=\char`\"{}6\char`\"{}></link>
+
+~~<link~from=\char`\"{}6\char`\"{}~to=\char`\"{}9\char`\"{}~condition=\char`\"{}19\char`\"{}></link>
+
+~~<link~from=\char`\"{}6\char`\"{}~to=\char`\"{}11\char`\"{}></link>
+
+~~<link~from=\char`\"{}11\char`\"{}~to=\char`\"{}6\char`\"{}></link>
+
+~~</map>
+\end{lyxcode}
+
+\caption{\label{XML}XML for Map in Figure \ref{Map_In_Advanced_Editor}}
+\end{figure}
+
+=end latex
+
+Fig. "XML for Map in Figure" shows the XML representation of the
+resource map shown in Fig. "Example of a Map in the Advanced Editor",
+which is the format in which maps are stored. In the figure, however,
+additional graphical map layout information generated by the Advanced
+Resource Assembly Tool is not displayed. This graphical information is
+optional to re-generate the same graphical layout when the map is
+brought up again in the Resource Assembly Tool, and is not needed for
+any other system functionality.
+
+Maps can be generated by tools other than the Resource Assembly
+Tool. In particular, an author might have some other representation of
+a course sequence, which can be converted into a map using scripts. If
+this map then were to be brought up in the Resource Assembly Tool, the
+Tool would automatically generate a graphical layout for it. Each
+entry of the map (resources, conditions and links) is stored in a
+separate tag.
+
+Resources and conditionsX<conditions> have to have unique ID
+numbers. These numbers are automatically generated by the Resource
+Assembly Tool when the entry is first created, or added to the entries
+when a map generated outside the Resource Assembly Tool is first
+retrieved. They can also be assigned by custom scripts or added in by
+hand.
+
+In the XML example, entry 1 is the start resource of the map. When
+this map is accessed, the source (src) URL of this tag will be the
+first resource rendered. Entry 2 is the finish resource of this
+map. This resource will be the last resource in the sequence of
+resources. Entry 6 is a problem resource with the given URL and title,
+as well as the priority "mandatory". Entry 19 is a condition, which is
+used by the link between entries 6, the problem, and 9, a
+sequence. I<The final syntax for conditions has not yet been
+determined.>
+
+=cut
+
 use strict;
 use Apache::Constants qw(:common);
 use Apache::lonnet;
 use Apache::lonratsrv;
 use Apache::lonsequence;
 use Apache::loncommon;
+use Apache::lonlocal;
 use File::Copy;
 
 use vars qw(@order @resources);
@@ -70,7 +206,7 @@ sub mapread {
             $links[$number]=$content;
         }
         if ($command eq 'objparms') {
-	    return('Map has resource parameters. Use advanced editor.',1);
+	    return(&mt('Map has resource parameters. Use advanced editor.'),1);
         }
     }
 # ------------------------------------------------------- Is this a linear map?
@@ -84,13 +220,13 @@ sub mapread {
 	    my ($start,$end,$cond)=split(/\:/,$_);
             if ((defined($starters[$start])) || (defined($endings[$end]))) { 
 		return
-                 ('Map has branchings. Use advanced editor.',1);
+                 (&mt('Map has branchings. Use advanced editor.'),1);
             }
 	    $starters[$start]=1;
 	    $endings[$end]=1;
 	    if ($cond) {
 		return
-                 ('Map has conditions. Use advanced editor.',1);
+                 (&mt('Map has conditions. Use advanced editor.'),1);
             }
 	}
 
@@ -99,7 +235,7 @@ sub mapread {
         if (defined($resources[$i])) {
 	    unless (($starters[$i]) || ($endings[$i])) {
                 return
-		 ('Map has unconnected resources. Use advanced editor.',1);
+		 (&mt('Map has unconnected resources. Use advanced editor.'),1);
             }
         }
     }
@@ -278,12 +414,15 @@ sub buttons {
     my $adv=shift;
     my $output='<form method=post>';     
     if ($adv==1) {
-	$output.='<input type=submit name=forceadv value="Edit">';
+	$output.='<input type=submit name=forceadv value="'.&mt('Edit').'">'.
+	    &Apache::loncommon::help_open_topic('Sequence_Advanced_Editor_Creation');;
     } else {
         unless ($adv==2) {
-           $output.='<input type=submit name=forcesmp value="Simple Edit">';
+           $output.='<input type=submit name=forcesmp value="'.&mt('Simple Edit').'">'.
+	    &Apache::loncommon::help_open_topic('Sequence_Simple_Editor_Creation');
         }
-	$output.='<input type=submit name=forceadv value="Advanced Edit">';
+	$output.='<input type=submit name=forceadv value="'.&mt('Advanced Edit').'">'.
+	    &Apache::loncommon::help_open_topic('Sequence_Advanced_Editor_Creation');
     }
     return $output.'</form><hr>';
 }
@@ -318,17 +457,38 @@ sub pastetarget {
 # modifies @resources
 
 sub startfinish {
+# Remove all start and finish
     foreach (@order) {
 	my ($name,$url,$ext)=split(/\:/,$resources[$_]);
         if ($url=~/http\&colon\:\/\//) { $ext='true'; }
         $resources[$_]=$name.':'.$url.':'.$ext.':normal:res';
     }
+# Garbage collection
+    my $stillchange=1;
+     while (($#order>1) && ($stillchange)) {
+       $stillchange=0;
+       for (my $i=0;$i<=$#order;$i++) {
+ 	  my ($name,$url,$ext)=split(/\:/,$resources[$order[$i]]);
+          unless ($url) {
+# Take out empty resource
+              for (my $j=$i+1;$j<=$#order;$j++) {
+                  $order[$j-1]=$order[$j];
+	      }
+              $#order--;
+	      $stillchange=1;
+              last;
+          }
+       }
+    }
+# Put in a start resource
    my ($name,$url,$ext)=split(/\:/,$resources[$order[0]]);
    $resources[$order[0]]=$name.':'.$url.':'.$ext.':start:res';
+# Make sure this has at least start and finish
    if ($#order==0) {
        $resources[$#resources+1]='::false';
        $order[1]=$#resources;
    }
+# Make the last one a finish resource
    ($name,$url,$ext)=split(/\:/,$resources[$order[$#order]]);
    $resources[$order[$#order]]=$name.':'.$url.':'.$ext.':finish:res';
 }
@@ -370,6 +530,7 @@ sub storemap {
 
 sub editscript {
     my $mode=shift;
+    my $resurl=&Apache::loncommon::lastresurl();
     return(<<ENDSCRIPT);
 var srch;
 var srchflag=-1; // 1 means currently open
@@ -414,7 +575,7 @@ function idxopen(mode) {
    var options="scrollbars=1,resizable=1,menubar=0";
    idxmode=mode;
    idxflag=1;
-   idx=open("/res/?launch=1&mode=$mode&catalogmode="+mode,"idxout",options);
+   idx=open("$resurl/?launch=1&mode=$mode&catalogmode="+mode,"idxout",options);
    idx.focus();
 }
 
@@ -453,7 +614,7 @@ function idxcheck(mode) {
 
     var editbrowser;
     function openbrowser(formname,elementname,only,omit) {
-        var url = '/res/?';
+        var url = '$resurl/?';
         if (editbrowser == null) {
             url += 'launch=1&';
         }
@@ -497,7 +658,7 @@ sub smpedt {
    }
    if (-e $tmpfn) {
       $targetmsg=
-        '<b><font color="red">You are working with an unsaved version of your map.</font></b><br>';
+        '<b><font color="red">'.&mt('You are working with an unsaved version of your map.').'</font></b><br>';
       my ($errtext,$fatal)=&mapread($tmpfn,'');
    }
 # ---------------------------------------------------------- Process form input
@@ -721,7 +882,7 @@ sub smpedt {
    $importdetail='&'.$importdetail;
    $importdetail=~s/^\&+/\&/;
    my $importwindow=
-       '<option value="-1"> ---- Import and Paste Area ---- </option>'.
+       '<option value="-1"> ---- '.&mt('Import and Paste Area').' ---- </option>'.
      join("\n",map {
        $idx++;
        if ($_) { 
@@ -736,7 +897,7 @@ sub smpedt {
    $idx=0;
    $targetdetail='';
    my $targetwindow=       
-       '<option value="0"> ------- Target Edit Map ------- </option>'.
+       '<option value="0"> ------- '.&mt('Target Edit Map').' ------- </option>'.
      join("\n",map { 
        my ($name,$url)=split(/\:/,$resources[$_]);
        unless ($name) {  $name=(split(/\//,$url))[-1]; }
@@ -751,6 +912,26 @@ sub smpedt {
 # ----------------------------------------------------- Start simple RAT screen
    my $editscript=&editscript('simple');
    my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
+   my %lt=&Apache::lonlocal::texthash(
+				      'sa' => 'Save',
+				      'nt' => 'New Title',
+				      'se' => 'Search',
+				      'im' => 'Import',
+				      'vi' => 'View',
+				      'lm' => 'Load Map',
+				      'ds' => 'Discard Selected',
+				      'ca' => 'Clear All',
+				      'ta' => 'Temporary Assembly Workspace',
+				      'rv' => 'Revert to Last Saved',
+                                      'sa' => 'Save',
+                                      'mu' => 'Move Up',
+                                      'md' => 'Move Down',
+                                      're' => 'Rename',
+                                      'as' => 'after selected',
+                                      'cs' => 'Cut selected',
+                                      'ps' => 'Copy selected',
+                                      'pas' => 'Paste after selected',
+				      );
    $r->print(<<ENDSMPHEAD);
 <html>
 <head>
@@ -787,7 +968,7 @@ sub smpedt {
        oldname=unescape(nameparts.join('"'));
        nameparts=oldname.split('&#39;');
        oldname=unescape(nameparts.join("'"));
-       newtitle=prompt('New Title',oldname);
+       newtitle=prompt('$lt{'nt'}',oldname);
        if (newtitle) {
            document.forms.simpleedit.renameres.value=1;
            document.forms.simpleedit.renameidx.value=selidx;
@@ -807,37 +988,37 @@ $buttons
 <input type=hidden name=renametitle value=''>
 <input type=hidden name=renameidx value=0>
 <table>
-    <tr><th width="40%">Temporary Assembly Workspace</th>
+    <tr><th width="40%">$lt{'ta'}</th>
 <th>&nbsp;</th>
 <th width="40%">File: $url</th></tr>
 <tr><td bgcolor="#FFFFCC">
-<input type=button onClick="javascript:groupsearch()" value="Search">
-<input type=button onClick="javascript:groupimport();" value="Import">
-after selected
+<input type=button onClick="javascript:groupsearch()" value="$lt{'se'}">
+<input type=button onClick="javascript:groupimport();" value="$lt{'im'}">
+$lt{'as'}
 <hr>
 <input type=text size=20 name=importmap>
 <input type=button 
 onClick="javascript:openbrowser('simpleedit','importmap','sequence,page','')"
-value="Browse"><input type=submit name=loadmap value="Load Map"><hr>
-<input type=submit name="discard" value="Discard Selected">
-<input type=submit name="clear" value="Clear All">
-<input type=button onClick="javascript:viewimport()" value="View">
+value="Select Map"><input type=submit name=loadmap value="$lt{'lm'}"><hr>
+<input type=submit name="discard" value="$lt{'ds'}">
+<input type=submit name="clear" value="$lt{'ca'}">
+<input type=button onClick="javascript:viewimport()" value="$lt{'vi'}">
 
     </td><td>&nbsp;</td><td bgcolor="#FFFFCC">
 
 <input type=button onClick=
-"javascript:impfortarget.value=1;groupsearch()" value="Search">
+"javascript:impfortarget.value=1;groupsearch()" value="$lt{'se'}">
 <input type=button onClick=
-"javascript:impfortarget.value=1;groupimport();" value="Import">
-after selected
+"javascript:impfortarget.value=1;groupimport();" value="$lt{'im'}">
+$lt{'as'}
 <hr>
-<input type=submit name="moveup" value="Move Up">
-<input type=submit name="movedown" value="Move Down">
-<input type=button onClick="javascript:renametarget()" value="Rename">
+<input type=submit name="moveup" value="$lt{'mu'}">
+<input type=submit name="movedown" value="$lt{'md'}">
+<input type=button onClick="javascript:renametarget()" value="$lt{'re'}">
 <hr>$targetmsg
-<input type=submit name="revert" value="Revert to Last Saved">
-<input type=submit name="save" value="Save">
-<input type=button onClick="javascript:viewtarget()" value="View">
+<input type=submit name="revert" value="$lt{'rv'}">
+<input type=submit name="save" value="$lt{'sa'}">
+<input type=button onClick="javascript:viewtarget()" value="$lt{'vi'}">
 </td></tr>
 
 <tr><td bgcolor="#FFFFCC"><select name="importsel" size=10 multiple>
@@ -845,13 +1026,13 @@ $importwindow
 </select>
 </td>
 <td bgcolor="#FFFFAA" align="center">
-Cut selected<br>
+$lt{'cs'}<br>
 <input type=submit name=cut value='<<<'><p>
 <hr>
-Copy selected<br>
+$lt{'ps'}<br>
 <input type=submit name=copy value='<--'><p>
 <hr>
-Paste after selected<br>
+$lt{'pas'}<br>
 <input type=submit name=paste value='-->'>
 </td>
 <td bgcolor="#FFFFCC"><select name="target" size=10 multiple>
@@ -892,6 +1073,9 @@ sub viewmap {
     }
     my $idx=0;
     $r->print('<h1>'.$url.'</h1>');
+    if ($adv) {
+	$r->print('<p><b><font color="red">'.&mt('Map contents are not shown in order.').'</font></b></p><br />');
+    }
     foreach (&attemptread(&Apache::lonnet::filelocation('',$url))) {
 	if (defined($_)) {
             $idx++;
@@ -915,11 +1099,17 @@ sub viewmap {
 
 sub handler {
   my $r=shift;
-  $r->content_type('text/html');
+  &Apache::loncommon::content_type($r,'text/html');
   $r->send_http_header;
 
   return OK if $r->header_only;
-
+  my $target = $ENV{'form.grade_target'};
+  if ($target eq 'meta') {
+      &Apache::loncommon::content_type($r,'text/html');
+      $r->send_http_header;
+      return OK;
+  }
+  
   my $url=$r->uri;
   my $fn=&Apache::lonnet::filelocation('',$url);