--- rat/lonratedt.pm	2001/05/01 15:23:40	1.2
+++ rat/lonratedt.pm	2002/05/13 21:26:05	1.15
@@ -1,26 +1,134 @@
 # The LearningOnline Network with CAPA
 # Edit Handler for RAT Maps
+#
+# $Id: lonratedt.pm,v 1.15 2002/05/13 21:26:05 www 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 Gerd Kortemeyer)
-# 7/1 Gerd Kortemeyer
+# 7/1,6/30 Gerd Kortemeyer
 
 package Apache::lonratedt;
 
 use strict;
 use Apache::Constants qw(:common);
+use Apache::lonnet;
+use Apache::lonratsrv;
 
-# ================================================================ Main Handler
+my @order=();
+my @resources=();
 
-sub handler {
-  my $r=shift;
-  $r->content_type('text/html');
-  $r->send_http_header;
 
-  return OK if $r->header_only;
+# Mapread read maps into global arrays @links and @resources, determines status
+# sets @order - pointer to resources in right order
+# sets @resources - array with the resources with correct idx
+#
+sub mapread {
+    my $fn=shift;
 
-  my $url=$r->uri;
+    my @links;
+    undef @links;
+    undef @resources;
+    undef @order;
+
+    my ($outtext,$errtext)=&Apache::lonratsrv::loadmap($fn,'');
+    if ($errtext) { return ($errtext,2); }
+
+# -------------------------------------------------------------------- Read map
+    foreach (split(/\<\&\>/,$outtext)) {
+	my ($command,$number,$content)=split(/\<\:\>/,$_);
+        if ($command eq 'objcont') {
+	    $resources[$number]=$content;
+        }
+        if ($command eq 'objlinks') {
+            $links[$number]=$content;
+        }
+    }
+# ------------------------------------------------------- Is this a linear map?
+    my @starters=();
+    my @endings=();
+    undef @starters;
+    undef @endings;
+
+    foreach (@links) {
+        if (defined($_)) {
+	    my ($start,$end,$cond)=split(/\:/,$_);
+            if ((defined($starters[$start])) || (defined($endings[$end]))) { 
+		return
+                 ('Map has branchings. Use advanced editor.',1);
+            }
+	    $starters[$start]=1;
+	    $endings[$end]=1;
+	    if ($cond) {
+		return
+                 ('Map has conditions. Use advanced editor.',1);
+            }
+	}
+
+    }
+    for (my $i=0; $i<=$#resources; $i++) {
+        if (defined($resources[$i])) {
+	    unless (($starters[$i]) || ($endings[$i])) {
+                return
+		 ('Map has unconnected resources. Use advanced editor.',1);
+            }
+        }
+    }
+
+# -------------------------------------------------- This is a linear map, sort
+
+    my $startidx=0;
+    my $endidx=0;
+    for (my $i=0; $i<=$#resources; $i++) {
+        if (defined($resources[$i])) {
+            my ($title,$url,$ext,$type)=split(/\:/,$resources[$i]);
+	    if ($type eq 'start') { $startidx=$i; }
+            if ($type eq 'finish') { $endidx=$i; }
+        }
+    }
+    my $k=0;
+    my $currentidx=$startidx;
+    $order[$k]=$currentidx;
+    for (my $i=0; $i<=$#resources; $i++) {
+        foreach (@links) {
+	    my ($start,$end)=split(/\:/,$_);
+            if ($start==$currentidx) {
+		$currentidx=$end;
+                $k++;
+                $order[$k]=$currentidx;
+                last;
+            }
+        }
+        if ($currentidx==$endidx) { last; }
+    }
+    return $errtext;
+}
 
+# --------------------------------------------------------- Build up RAT screen
+sub ratedt {
+  my ($r,$url)=@_;
   $r->print(<<ENDDOCUMENT);
 
 <html>
@@ -37,6 +145,374 @@ sub handler {
 </html>
 
 ENDDOCUMENT
+}
+
+# ---------------------------------------------------------------- Make buttons
+
+sub buttons {
+    my $adv=shift;
+    my $output='<form method=post>';     
+    if ($adv==1) {
+	$output.='<input type=submit name=forceadv value="Edit">';
+    } else {
+        unless ($adv==2) {
+           $output.='<input type=submit name=forcesmp value="Simple Edit">';
+        }
+	$output.='<input type=submit name=forceadv value="Advanced Edit">';
+    }
+    return $output.'</form><hr>';
+}
+
+sub smpedt {
+   my ($r,$errtext)=@_;
+   my $buttons=&buttons(2);
+
+# ---------------------------------------------------------- Process form input
+
+   my @importselect=();
+   my @targetselect=();
+   undef @importselect;
+   undef @targetselect;
+   if (defined($ENV{'form.import'})) {
+       if (ref($ENV{'form.import'})) {
+	   @importselect=sort($ENV->{'form.import'});
+       } else {
+           @importselect=($ENV{'form.import'});
+       }
+   }
+   if (defined($ENV{'form.target'})) {
+       if (ref($ENV{'form.target'})) {
+	   @targetselect=sort($ENV->{'form.target'});
+       } else {
+           @targetselect=($ENV{'form.target'});
+       }
+   }
+# ============================================================ Process commands
+
+   my $targetdetail=$ENV{'form.targetdetail'};
+   my $importdetail=$ENV{'form.curimpdetail'};
+
+# ---------------------------------------------------- Importing from groupsort
+   if ($ENV{'form.importdetail'}) {
+
+       $importdetail='';
+       my @curimport=split(/\&/,$ENV{'form.curimpdetail'});
+
+       my $lastsel;
+
+       if (defined($importselect[-1])) {
+	   $lastsel=$importselect[-1];
+       } else {
+           $lastsel=$#curimport;
+       }
+
+       for (my $i=0;$i<=$lastsel;$i++) {
+           my ($name,$url)=split(/\=/,$curimport[$i]);
+           if ($url) {
+              $importdetail.='&'.&Apache::lonnet::escape($name).'='.
+		 	         &Apache::lonnet::escape($url);
+	   }
+       }
+
+      $importdetail.='&'.$ENV{'form.importdetail'};
+
+       for (my $i=$lastsel+1;$i<=$#curimport;$i++) {
+           my ($name,$url)=split(/\=/,$curimport[$i]);
+           if ($url) {
+              $importdetail.='&'.&Apache::lonnet::escape($name).'='.
+		 	         &Apache::lonnet::escape($url);
+	  }
+       }
+       $importdetail=~s/\&+/\&/g;
+       $importdetail=~s/^\&//;
+
+# ------------------------------------------------------------------- Clear all
+   } elsif ($ENV{'form.clear'}) {
+       $importdetail='';
+# ------------------------------------------------------------ Discard selected
+   } elsif ($ENV{'form.discard'}) {
+       $importdetail='';
+       my @curimport=split(/\&/,$ENV{'form.curimpdetail'});
+       foreach (@importselect) {
+	   $curimport[$_]='';
+       }
+       for (my $i=0;$i<=$#curimport;$i++) {
+           my ($name,$url)=split(/\=/,$curimport[$i]);
+           if ($url) {
+              $importdetail.='&'.&Apache::lonnet::escape($name).'='.
+		 	         &Apache::lonnet::escape($url);
+	   }
+       }
+# ---------------------------
+   }
+
+# ------------------------------------------------------------ Assemble windows
+
+   my $idx=-1;
+   my $importwindow=join("\n",map {
+       $idx++;
+       if ($_) { 
+          my ($name,$url)=split(/\=/,$_);
+          unless ($name) { $name=(split(/\//,$url))[-1]; }
+          unless ($name) { $name='EMPTY'; }
+          '<option value="'.$idx.'">'.&Apache::lonnet::unescape($name).
+                                    '</option>';
+      }
+   } split(/\&/,$importdetail));
+
+   $idx=0;
+   my $targetwindow=join("\n",map { 
+       my ($name,$url)=split(/\:/,$resources[$_]);
+       unless ($name) {  $name=(split(/\//,$url))[-1]; }
+       unless ($name) { $name='EMPTY'; }
+       $targetdetail.='&'.&Apache::lonnet::escape($name).'='.
+	                  &Apache::lonnet::escape($url);
+       $idx++;
+       '<option value="'.$idx.'_'.$_.'">'.$name.'</option>';
+   } @order);
+
+# ----------------------------------------------------- Start simple RAT screen
+   $r->print(<<ENDSMPHEAD);
+<html>
+<head>
+<script>
+var srch;
+var srchflag=-1; // 1 means currently open
+                 // 0 means closed (but has been open)
+                 // -1 means never yet opened/defined
+var srchmode='';
+
+var idx;
+var idxflag=-1; // 1 means currently open
+                 // 0 means closed (but has been open)
+                 // -1 means never yet opened/defined
+var idxmode='';
+
+// ------------------------------------------------------ Clears indexer window
+function idxclear() {
+  idx.document.clear();
+}
+
+// ------------------------------------------------------- Clears search window
+function srchclear() {
+  srch.document.clear();
+}
+
+// ------------------------------------------------------ Closes indexer window
+function idxclose() {
+  if (idx && !idx.closed) {
+    idxflag=0;
+    idx.close();
+  }
+}
+
+// ------------------------------------------------------- Closes search window
+function srchclose() {
+  if (srch && !srch.closed) {
+    srchflag=0;
+    srch.close();
+  }
+}
+
+// -------------------------------------------------------- Open indexer window
+function idxopen(mode) {
+   var options="scrollbars=1,resizable=1,menubar=0";
+   idxmode=mode;
+   idxflag=1;
+   idx=open("/res/?launch=1&mode=simple&catalogmode="+mode,"idxout",options);
+   idx.focus();
+}
+
+// --------------------------------------------------------- Open search window
+function srchopen(mode) {
+   var options="scrollbars=1,resizable=1,menubar=0";
+   srchmode=mode;
+   srchflag=1;
+   srch=open("/adm/searchcat?launch=1&mode=simple&catalogmode="+mode,"srchout",options);
+   srch.focus();
+}
+// ----------------------------------------------------- launch indexer browser
+function groupsearch() {
+   srchcheck('groupsearch');
+}
+
+function groupimport() {
+   idxcheck('groupimport');
+}
+// ------------------------------------------------------- Do srch status check
+function srchcheck(mode) {
+   if (!srch || srch.closed || srchmode!=mode) {
+      srchopen(mode);
+   }
+   srch.focus();
+}
+
+// -------------------------------------------------------- Do idx status check
+function idxcheck(mode) {
+   if (!idx || idx.closed || idxmode!=mode) {
+      idxopen(mode);
+   }
+   idx.focus();
+}
+
+
+    var editbrowser;
+    function openbrowser(formname,elementname,only,omit) {
+        var url = '/res/?';
+        if (editbrowser == null) {
+            url += 'launch=1&';
+        }
+        url += 'catalogmode=interactive&';
+        url += 'mode=edit&';
+        url += 'form=' + formname + '&';
+        if (only != null) {
+            url += 'only=' + only + '&';
+        } 
+        if (omit != null) {
+            url += 'omit=' + omit + '&';
+        }
+        url += 'element=' + elementname + '';
+        var title = 'Browser';
+        var options = 'scrollbars=1,resizable=1,menubar=0';
+        options += ',width=700,height=600';
+        editbrowser = open(url,title,options,'1');
+        editbrowser.focus();
+    }
+</script>
+</head>                 
+<body bgcolor='#FFFFFF'>
+$buttons
+<font color=red>$errtext</font>
+<form name=simpleedit method=post>
+<input type=hidden name=forcesmp value=1>
+<table>
+    <tr><th width="40%">Import</th>
+<th>&nbsp;</th>
+<th width="40%">Target</th></tr>
+<tr><td bgcolor="#FFFFCC">
+<input type=button onClick="javascript:groupsearch()" value="Group Search">
+<input type=button onClick="javascript:groupimport();" value="Group Import">
+after selected
+<hr>
+<input type=text size=20 name=importmap>
+<input type=button 
+onClick="javascript:openbrowser('simpleedit','importmap','sequence,page','')"
+value="Browse"><input type=submit name=loadmap value="Load Map"><hr>
+<input type=submit name="discard" value="Discard Selected">
+<input type=submit name="clear" value="Clear All">
+<input type=button onClick="javascript:viewimport()" value="View">
+    </td><td>&nbsp;</td><td bgcolor="#FFFFCC">
+<input type=button onClick="javascript:viewtarget()" value="View">
+</td></tr>
+<tr><td bgcolor="#FFFFCC"><select name="import" multiple>
+$importwindow
+</select>
+</td>
+<td bgcolor="#FFFFAA" align="center">
+Cut selected<br>
+<input type=submit name=cut value='<<<'><p>
+<hr>
+Paste after selected<br>
+<input type=submit name=paste value='>>>'>
+</td>
+<td bgcolor="#FFFFCC"><select name="target" multiple>
+$targetwindow
+</select>
+</table>
+<input type=hidden name=importdetail value="">
+<input type=hidden name=curimpdetail value="$importdetail">
+<input type=hidden name=targetdetail value="$targetdetail">
+</form>
+</body></html>
+ENDSMPHEAD
+}
+
+# ----------------------------------------------------------------- No such dir
+sub nodir {
+   my ($r,$dir)=@_;
+   $dir=~s/^\/home\/\w+\/public\_html//;
+   $r->print(<<ENDNODIR);
+<html>
+<body bgcolor='#FFFFFF'>
+<h1>No such directory: $dir</h1>
+</body>
+</html>
+ENDNODIR
+}
+
+# ---------------------------------------------------------------- View Handler
+
+sub viewmap {
+    my ($r,$adv,$errtext)=@_;
+    $r->print('<html><body bgcolor="#FFFFFF">'.&buttons($adv));
+    if ($errtext) {
+	$r->print($errtext.'<hr>');
+    }
+    foreach (@resources) {
+	if (defined($_)) {
+	    my ($title,$url)=split(/\:/,$_);
+            $title=~s/\&colon\;/\:/g;
+            $url=~s/\&colon\;/\:/g;
+            unless ($title) { $title=(split(/\//,$url))[-1] };
+            unless ($title) { $title='<i>Empty</i>'; }
+            if ($url) {
+		$r->print('<a href="'.&Apache::lonratsrv::qtescape($url).'">');
+            }
+            $r->print(&Apache::lonratsrv::qtescape($title));
+            if ($url) { $r->print('</a>'); }
+            $r->print('<br>');
+        }
+    }
+    $r->print('</body></html>');
+}
+
+# ================================================================ Main Handler
+
+sub handler {
+  my $r=shift;
+  $r->content_type('text/html');
+  $r->send_http_header;
+
+  return OK if $r->header_only;
+
+  my $url=$r->uri;
+  my $fn=&Apache::lonnet::filelocation('',$url);
+
+  my ($dir)=($fn=~/^(.+)\/[^\/]+$/);
+  unless (-e $dir) {
+      &nodir($r,$dir);
+      return OK;
+  }
+
+# ------------------------------------------- Determine which tools can be used
+  my $adv=0;
+
+  unless ($ENV{'form.forcesmp'}) {
+     if ($ENV{'form.forceadv'}) {
+        $adv=1;
+     } elsif (my $fh=Apache::File->new($fn)) {
+	 my $allmap=join('',<$fh>);
+         $adv=($allmap=~/\<map[^\>]+mode\s*\=\s*(\'|\")rat/is);
+     }
+  }
+
+  my $errtext='';
+  my $fatal=0;
+
+# -------------------------------------------------------------------- Load map
+  ($errtext,$fatal)=&mapread($fn,$errtext);
+
+  if ($fatal==1) { $adv=1; }
+
+# ----------------------------------- adv==1 now means "graphical MUST be used"
+
+  if ($ENV{'form.forceadv'}) {
+      &ratedt($r,$url);
+  } elsif ($ENV{'form.forcesmp'}) {
+      &smpedt($r,$errtext);
+  } else {
+      &viewmap($r,$adv,$errtext);
+  }
   return OK;
 }