--- loncom/homework/lonhomework.pm	2001/09/14 20:14:12	1.60
+++ loncom/homework/lonhomework.pm	2001/12/04 14:51:19	1.64
@@ -1,4 +1,30 @@
+# The LearningOnline Network with CAPA
 # The LON-CAPA Homework handler
+#
+# $Id: lonhomework.pm,v 1.64 2001/12/04 14:51:19 albertel 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/
+#
 # Guy Albertelli
 # 11/30 Gerd Kortemeyer
 # 6/1,8/17,8/18 Gerd Kortemeyer
@@ -23,21 +49,22 @@ sub BEGIN {
 
 sub get_target {
   if ( $ENV{'request.state'} eq "published") {
-    if ( defined $ENV{'form.submitted'}) {
+    if ( defined($ENV{'form.submitted'})) {
       return ('grade', 'web');
     } else {
       return ('web');
     }
   } elsif ($ENV{'request.state'} eq "construct") {
-    if ( defined $ENV{'form.preview'}) {
-      if ( defined $ENV{'form.submitted'}) {
+    if ( defined($ENV{'form.preview'})) {
+      if ( defined($ENV{'form.submitted'})) {
 	return ('grade', 'web');
       } else {
 	return ('web');
       }
     } else {
       if ( $ENV{'form.problemmode'} eq 'View' ) {
-	if ( defined $ENV{'form.submitted'}) {
+	if ( defined($ENV{'form.submitted'}) &&
+	     (!defined($ENV{'form.resetdata'})) ) {
 	  return ('grade', 'web','answer');
 	} else {
 	  return ('web','answer');
@@ -176,6 +203,7 @@ sub setupheader {
   } else {
     $request->content_type('text/html');
   }
+  if (!$Apache::lonxml::debug) { &Apache::loncommon::no_cache($request); }
   $request->send_http_header;
   return OK if $request->header_only;
   return ''
@@ -185,12 +213,14 @@ sub handle_save_or_undo {
   my ($request,$problem,$result) = @_;
   my $fileout = &Apache::lonnet::filelocation("",$request->uri);
   my $filesave=$fileout.".bak";
+  my $error=0;
 
   if ($ENV{'form.Undo'} eq 'undo') {
     if (copy($filesave,$fileout)) {
       $request->print("<b>Undid changes, Copied $filesave to $fileout<br /></b>");
     } else {
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to undo, unable to copy $filesave to $fileout<br /></b></font>");
+      $error=1;
     }
   } else {
     my $fs=Apache::File->new(">$filesave");
@@ -199,6 +229,7 @@ sub handle_save_or_undo {
       $request->print("<b>Making Backup to $filesave</b><br />");
     } else {
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to make backup $filesave</b></font>");
+      $error=2;
     }
     my $fh=Apache::File->new(">$fileout");
     if (defined($fh)) {
@@ -206,8 +237,42 @@ sub handle_save_or_undo {
       $request->print("<b>Saving Modifications to $fileout</b><br />");
     } else {
       $request->print("<font color=\"red\" size=\"+1\"><b>Unable to write to $fileout</b></font>");
+      $error|=4;
     }
   }
+  return $error;
+}
+
+sub editxmlmode {
+  my ($request,$file) = @_;
+  my $result;
+  my $problem=&Apache::lonnet::getfile($file);
+  if ($problem == -1) {
+    &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
+    $problem='';
+  }
+  if (defined($ENV{'form.editxmltext'}) || defined($ENV{'form.Undo'})) {
+    my $error=&handle_save_or_undo($request,\$problem,
+				   \$ENV{'form.editxmltext'});
+    if (!$error) { $problem=&Apache::lonnet::getfile($file); }
+  }
+  my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
+  if ($cols > 80) { $cols = 80; }
+  $result.='<html><body bgcolor="#FFFFFF">
+            <form name="lonhomework" method="POST" action="'.
+	      $ENV{'request.uri'}.'">
+            <input type="hidden" name="problemmode" value="EditXML" />
+            <input type="submit" name="problemmode" value="View" />
+            <input type="submit" name="problemmode" value="Edit" />
+            <hr />
+            <input type="submit" name="submit" value="Submit Changes" />
+            <input type="submit" name="Undo" value="undo" />
+            <hr />
+            <textarea rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
+	      $problem.'</textarea>
+            </form></body></html>';
+  $request->print($result);
+  return '';
 }
 
 sub renderpage {
@@ -235,7 +300,7 @@ sub renderpage {
       }
       #if ($Apache::lonhomework::viewgrades eq 'F') {&createmenu('grade',$request); }
     }
-    if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }
+    #if ($target eq 'grade') { &showhash(%Apache::lonhomework::history); }
 
     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
     if ($default == -1) {
@@ -337,7 +402,7 @@ sub handler {
   $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$ENV{'request.filename'});
   $Apache::lonhomework::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
   &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:");
-
+  &Apache::lonxml::debug("Problem Mode ".$ENV{'form.problemmode'});
   my $file=&Apache::lonnet::filelocation("",$request->uri);
 
   #check if we know where we are
@@ -350,11 +415,18 @@ sub handler {
   }
 
   if ($ENV{'request.state'} eq "construct") {
+    if ($ENV{'form.resetdata'} eq 'Reset Submissions') {
+      my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+      &Apache::lonnet::tmpreset($symb,'',$domain,$name);
+    }
     if ( -e $file ) {
       if (!(defined $ENV{'form.problemmode'})) {
 	#first visit to problem in construction space
-	&view_or_edit_menu($request);
-	#&renderpage($request,$file);
+	#&view_or_edit_menu($request);
+	$ENV{'form.problemmode'}='View';
+	&renderpage($request,$file);
+      } elsif ($ENV{'form.problemmode'} eq 'EditXML') {
+	&editxmlmode($request,$file);
       } else {
 	&renderpage($request,$file);
       }