--- loncom/interface/loncommon.pm	2012/04/04 21:04:55	1.1063
+++ loncom/interface/loncommon.pm	2012/11/08 20:46:42	1.1096
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1063 2012/04/04 21:04:55 raeburn Exp $
+# $Id: loncommon.pm,v 1.1096 2012/11/08 20:46:42 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -70,6 +70,9 @@ use Apache::lonclonecourse();
 use LONCAPA qw(:DEFAULT :match);
 use DateTime::TimeZone;
 use DateTime::Locale::Catalog;
+use Text::Aspell;
+use Authen::Captcha;
+use Captcha::reCAPTCHA;
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -154,6 +157,7 @@ sub ssi_with_retries {
 # ----------------------------------------------- Filetypes/Languages/Copyright
 my %language;
 my %supported_language;
+my %supported_codes;
 my %latex_language;		# For choosing hyphenation in <transl..>
 my %latex_language_bykey;	# for choosing hyphenation from metadata
 my %cprtag;
@@ -188,14 +192,15 @@ BEGIN {
             while (my $line = <$fh>) {
                 next if ($line=~/^\#/);
                 chomp($line);
-                my ($key,$two,$country,$three,$enc,$val,$sup,$latex)=(split(/\t/,$line));
+                my ($key,$code,$country,$three,$enc,$val,$sup,$latex)=(split(/\t/,$line));
                 $language{$key}=$val.' - '.$enc;
                 if ($sup) {
                     $supported_language{$key}=$sup;
+		    $supported_codes{$key}   = $code;
                 }
 		if ($latex) {
 		    $latex_language_bykey{$key} = $latex;
-		    $latex_language{$two} = $latex;
+		    $latex_language{$code} = $latex;
 		}
             }
             close($fh);
@@ -657,7 +662,7 @@ if (!Array.prototype.indexOf) {
         var n = 0;
         if (arguments.length > 0) {
             n = Number(arguments[1]);
-            if (n !== n) { // shortcut for verifying if it's NaN
+            if (n !== n) { // shortcut for verifying if it is NaN
                 n = 0;
             } else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0)) {
                 n = (n > 0 || -1) * Math.floor(Math.abs(n));
@@ -885,10 +890,14 @@ sub check_uncheck_jscript {
 function checkAll(field) {
     if (field.length > 0) {
         for (i = 0; i < field.length; i++) {
-            field[i].checked = true ;
+            if (!field[i].disabled) { 
+                field[i].checked = true;
+            }
         }
     } else {
-        field.checked = true
+        if (!field.disabled) { 
+            field.checked = true;
+        }
     }
 }
  
@@ -995,6 +1004,33 @@ sub select_language {
 
 =pod
 
+
+=item * &list_languages()
+
+Returns an array reference that is suitable for use in language prompters.
+Each array element is itself a two element array.  The first element
+is the language code.  The second element a descsriptiuon of the 
+language itself.  This is suitable for use in e.g.
+&Apache::edit::select_arg (once dereferenced that is).
+
+=cut 
+
+sub list_languages {
+    my @lang_choices;
+
+    foreach my $id (&languageids()) {
+	my $code = &supportedlanguagecode($id);
+	if ($code) {
+	    my $selector    = $supported_codes{$id};
+	    my $description = &plainlanguagedescription($id);
+	    push (@lang_choices, [$selector, $description]);
+	}
+    }
+    return \@lang_choices;
+}
+
+=pod
+
 =item * &linked_select_forms(...)
 
 linked_select_forms returns a string containing a <script></script> block
@@ -1374,7 +1410,7 @@ function helpMenu(target) {
     return;
 }
 function writeHelp(caller) {
-    caller.document.writeln('$start_page<frame name="bannerframe"  src="'+banner_link+'" /><frame name="bodyframe" src="$details_link" /> $end_page')
+    caller.document.writeln('$start_page\\n<frame name="bannerframe" src="'+banner_link+'" />\\n<frame name="bodyframe" src="$details_link" />\\n$end_page')
     caller.document.close()
     caller.focus()
 }
@@ -1981,19 +2017,112 @@ sub select_form {
 # For display filters
 
 sub display_filter {
+    my ($context) = @_;
     if (!$env{'form.show'}) { $env{'form.show'}=10; }
     if (!$env{'form.displayfilter'}) { $env{'form.displayfilter'}='currentfolder'; }
-    return '<span class="LC_nobreak"><label>'.&mt('Records [_1]',
+    my $phraseinput = 'hidden';
+    my $includeinput = 'hidden';
+    my ($checked,$includetypestext);
+    if ($env{'form.displayfilter'} eq 'containing') {
+        $phraseinput = 'text'; 
+        if ($context eq 'parmslog') {
+            $includeinput = 'checkbox';
+            if ($env{'form.includetypes'}) {
+                $checked = ' checked="checked"';
+            }
+            $includetypestext = &mt('Include parameter types');
+        }
+    } else {
+        $includetypestext = '&nbsp;';
+    }
+    my ($additional,$secondid,$thirdid);
+    if ($context eq 'parmslog') {
+        $additional = 
+            '<label><input type="'.$includeinput.'" name="includetypes"'. 
+            $checked.' name="includetypes" value="1" id="includetypes" />'.
+            '&nbsp;<span id="includetypestext">'.$includetypestext.'</span>'.
+            '</label>';
+        $secondid = 'includetypes';
+        $thirdid = 'includetypestext';
+    }
+    my $onchange = "javascript:toggleHistoryOptions(this,'containingphrase','$context',
+                                                    '$secondid','$thirdid')";
+    return '<span class="LC_nobreak"><label>'.&mt('Records: [_1]',
 			       &Apache::lonmeta::selectbox('show',$env{'form.show'},undef,
 							   (&mt('all'),10,20,50,100,1000,10000))).
 	   '</label></span> <span class="LC_nobreak">'.
-           &mt('Filter [_1]',
+           &mt('Filter: [_1]',
 	   &select_form($env{'form.displayfilter'},
 			'displayfilter',
 			{'currentfolder' => 'Current folder/page',
 			 'containing' => 'Containing phrase',
-			 'none' => 'None'})).
-			 '<input type="text" name="containingphrase" size="30" value="'.&HTML::Entities::encode($env{'form.containingphrase'}).'" /></span>';
+			 'none' => 'None'},$onchange)).'&nbsp;'.
+			 '<input type="'.$phraseinput.'" name="containingphrase" id="containingphrase" size="30" value="'.
+                         &HTML::Entities::encode($env{'form.containingphrase'}).
+                         '" />'.$additional;
+}
+
+sub display_filter_js {
+    my $includetext = &mt('Include parameter types');
+    return <<"ENDJS";
+  
+function toggleHistoryOptions(setter,firstid,context,secondid,thirdid) {
+    var firstType = 'hidden';
+    if (setter.options[setter.selectedIndex].value == 'containing') {
+        firstType = 'text';
+    }
+    firstObject = document.getElementById(firstid);
+    if (typeof(firstObject) == 'object') {
+        if (firstObject.type != firstType) {
+            changeInputType(firstObject,firstType);
+        }
+    }
+    if (context == 'parmslog') {
+        var secondType = 'hidden';
+        if (firstType == 'text') {
+            secondType = 'checkbox';
+        }
+        secondObject = document.getElementById(secondid);  
+        if (typeof(secondObject) == 'object') {
+            if (secondObject.type != secondType) {
+                changeInputType(secondObject,secondType);
+            }
+        }
+        var textItem = document.getElementById(thirdid);
+        var currtext = textItem.innerHTML;
+        var newtext;
+        if (firstType == 'text') {
+            newtext = '$includetext';
+        } else {
+            newtext = '&nbsp;';
+        }
+        if (currtext != newtext) {
+            textItem.innerHTML = newtext;
+        }
+    }
+    return;
+}
+
+function changeInputType(oldObject,newType) {
+    var newObject = document.createElement('input');
+    newObject.type = newType;
+    if (oldObject.size) {
+        newObject.size = oldObject.size;
+    }
+    if (oldObject.value) {
+        newObject.value = oldObject.value;
+    }
+    if (oldObject.name) {
+        newObject.name = oldObject.name;
+    }
+    if (oldObject.id) {
+        newObject.id = oldObject.id;
+    }
+    oldObject.parentNode.replaceChild(newObject,oldObject);
+    return;
+}
+
+ENDJS
 }
 
 sub gradeleveldescription {
@@ -2893,6 +3022,45 @@ sub get_related_words {
     untie %thesaurus_db;
     return @Words;
 }
+###############################################################
+#
+#  Spell checking
+#
+
+=pod
+
+=head1 Spell checking
+
+=over 4
+
+=item * &check_spelling($wordlist $language)
+
+Takes a string containing words and feeds it to an external
+spellcheck program via a pipeline. Returns a string containing
+them mis-spelled words.
+
+Parameters:
+
+=over 4
+
+=item - $wordlist
+
+String that will be fed into the spellcheck program.
+
+=item - $language
+
+Language string that specifies the language for which the spell
+check will be performed.
+
+=back
+
+=back
+
+Note: This sub assumes that aspell is installed.
+
+
+=cut
+
 
 =pod
 
@@ -2900,6 +3068,31 @@ sub get_related_words {
 
 =cut
 
+sub check_spelling {
+    my ($wordlist, $language) = @_;
+    my @misspellings;
+    
+    # Generate the speller and set the langauge.
+    # if explicitly selected:
+
+    my $speller = Text::Aspell->new;
+    if ($language) {
+	$speller->set_option('lang', $language);
+    }
+
+    # Turn the word list into an array of words by splittingon whitespace
+
+    my @words = split(/\s+/, $wordlist);
+
+    foreach my $word (@words) {
+	if(! $speller->check($word)) {
+	    push(@misspellings, $word);
+	}
+    }
+    return join(' ', @misspellings);
+    
+}
+
 # -------------------------------------------------------------- Plaintext name
 =pod
 
@@ -3129,12 +3322,12 @@ sub noteswrapper {
 # ------------------------------------------------------------- Aboutme Wrapper
 
 sub aboutmewrapper {
-    my ($link,$username,$domain,$target)=@_;
+    my ($link,$username,$domain,$target,$class)=@_;
     if (!defined($username)  && !defined($domain)) {
         return;
     }
-    return '<a href="/adm/'.$domain.'/'.$username.'/aboutme?forcestudent=1"'.
-	($target?' target="$target"':'').' title="'.&mt("View this user's personal information page").'">'.$link.'</a>';
+    return '<a href="/adm/'.$domain.'/'.$username.'/aboutme"'.
+	($target?' target="'.$target.'"':'').($class?' class="'.$class.'"':'').' title="'.&mt("View this user's personal information page").'">'.$link.'</a>';
 }
 
 # ------------------------------------------------------------ Syllabus Wrapper
@@ -3990,9 +4183,7 @@ sub findallcourses {
         $udom = $env{'user.domain'};
     }
     if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
-        my $extra = &Apache::lonnet::freeze_escape({'skipcheck' => 1});
-        my %roleshash = &Apache::lonnet::dump('roles',$udom,$uname,'.',undef,
-                                              $extra);
+        my %roleshash = &Apache::lonnet::dump('roles',$udom,$uname);
         if (!%roles) {
             %roles = (
                        cc => 1,
@@ -4869,6 +5060,10 @@ Inputs:
                               should it have jsmath forced on by the
                               current page
 
+=item * $advtoolsref, optional argument, ref to an array containing
+            inlineremote items to be added in "Functions" menu below
+            breadcrumbs.
+
 =back
 
 Returns: A uniform header for LON-CAPA web pages.  
@@ -4880,7 +5075,7 @@ other decorations will be returned.
 
 sub bodytag {
     my ($title,$function,$addentries,$bodyonly,$domain,$forcereg,
-        $no_nav_bar,$bgcolor,$args)=@_;
+        $no_nav_bar,$bgcolor,$args,$advtoolsref)=@_;
 
     my $public;
     if ((($env{'user.name'} eq 'public') && ($env{'user.domain'} eq 'public'))
@@ -4937,7 +5132,8 @@ sub bodytag {
     if ($public) {
 	undef($role);
     } else {
-	$name = &aboutmewrapper($name,$env{'user.name'},$env{'user.domain'});
+	$name = &aboutmewrapper($name,$env{'user.name'},$env{'user.domain'},
+                                undef,'LC_menubuttons_link');
     }
     
     my $titleinfo = '<h1>'.$title.'</h1>';
@@ -4998,8 +5194,15 @@ sub bodytag {
             if ($env{'request.state'} eq 'construct') {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,
                                 $args->{'bread_crumbs'});
-            } elsif ($forcereg) { 
-                $bodytag .= &Apache::lonmenu::innerregister($forcereg);
+            } elsif ($forcereg) {
+                $bodytag .= &Apache::lonmenu::innerregister($forcereg,undef,
+                                                            $args->{'group'});
+            } else {
+                $bodytag .= 
+                    &Apache::lonmenu::prepare_functions($env{'request.noversionuri'},
+                                                        $forcereg,$args->{'group'},
+                                                        $args->{'bread_crumbs'},
+                                                        $advtoolsref);
             }
         }else{
             # this is to seperate menu from content when there's no secondary
@@ -5014,7 +5217,7 @@ sub bodytag {
 sub dc_courseid_toggle {
     my ($dc_info) = @_;
     return ' <span id="dccidtext" class="LC_cusr_subheading LC_nobreak">'.
-           '<a href="javascript:showCourseID();">'.
+           '<a href="javascript:showCourseID();" class="LC_menubuttons_link">'.
            &mt('(More ...)').'</a></span>'.
            '<div id="dccid" class="LC_dccid">'.$dc_info.'</div>';
 }
@@ -5071,7 +5274,10 @@ i.e., $env{'internal.head.redirect'} exi
 
 sub endbodytag {
     my ($args) = @_;
-    my $endbodytag='</body>';
+    my $endbodytag;
+    unless ((ref($args) eq 'HASH') && ($args->{'notbody'})) {
+        $endbodytag='</body>';
+    }
     $endbodytag=&Apache::lontexconvert::jsMath_process()."\n".$endbodytag;
     if ( exists( $env{'internal.head.redirect'} ) ) {
         if (!(ref($args) eq 'HASH' && $args->{'noredirectlink'})) {
@@ -6354,6 +6560,7 @@ fieldset > legend {
 ol.LC_primary_menu {
   float: right;
   margin: 0;
+  padding: 0;
   background-color: $pgbg_or_bgcolor;
 }
 
@@ -6362,14 +6569,55 @@ ol#LC_PathBreadcrumbs {
 }
 
 ol.LC_primary_menu li {
-  display: inline;
-  padding: 5px 5px 0 10px;
+  color: RGB(80, 80, 80);
+  vertical-align: middle;
+  text-align: left;
+  list-style: none;
+  float: left;
+}
+
+ol.LC_primary_menu li a {
+  display: block;
+  margin: 0;
+  padding: 0 5px 0 10px;
+  text-decoration: none;
+}
+
+ol.LC_primary_menu li ul {
+  display: none;
+  width: 10em;
+  background-color: $data_table_light;
+}
+
+ol.LC_primary_menu li:hover ul, ol.LC_primary_menu li.hover ul {
+  display: block;
+  position: absolute;
+  margin: 0;
+  padding: 0;
+  z-index: 2;
+}
+
+ol.LC_primary_menu li:hover li, ol.LC_primary_menu li.hover li {
+  font-size: 90%;
   vertical-align: top;
+  float: none;
+  border-left: 1px solid black;
+  border-right: 1px solid black;
+}
+
+ol.LC_primary_menu li:hover li a, ol.LC_primary_menu li.hover li a {
+  background-color:$data_table_light;
+}
+
+ol.LC_primary_menu li li a:hover {
+   color:$button_hover;
+   background-color:$data_table_dark;
 }
 
 ol.LC_primary_menu li img {
   vertical-align: bottom;
   height: 1.1em;
+  margin: 0.2em 0 0 0;
 }
 
 ol.LC_primary_menu a {
@@ -6763,6 +7011,7 @@ ul#LC_toolbar {
   list-style:none;
   position:relative;
   background-color:white;
+  overflow: auto;
 }
 
 ul#LC_toolbar li {
@@ -6772,6 +7021,7 @@ ul#LC_toolbar li {
   float: left;
   display:inline;
   vertical-align:middle;
+  white-space: nowrap;
 }
 
 
@@ -6916,6 +7166,8 @@ sub headtag {
 	'<head>'.
 	&font_settings();
 
+    my $inhibitprint = &print_suppression();
+
     if (!$args->{'frameset'}) {
 	$result .= &Apache::lonhtmlcommon::htmlareaheaders();
     }
@@ -6961,6 +7213,7 @@ ADDMETA
     if (!$args->{'no_auto_mt_title'}) { $title = &mt($title); }
     $result .= '<title> LON-CAPA '.$title.'</title>'
 	.'<link rel="stylesheet" type="text/css" href="'.$url.'" />'
+        .$inhibitprint
 	.$head_extra;
     return $result.'</head>';
 }
@@ -6986,6 +7239,82 @@ sub font_settings {
 
 =pod
 
+=item * &print_suppression()
+
+In course context returns css which causes the body to be blank when media="print",
+if printout generation is unavailable for the current resource.
+
+This could be because:
+
+(a) printstartdate is in the future
+
+(b) printenddate is in the past
+
+(c) there is an active exam block with "printout"
+functionality blocked
+
+Users with pav, pfo or evb privileges are exempt.
+
+Inputs: none
+
+=cut
+
+
+sub print_suppression {
+    my $noprint;
+    if ($env{'request.course.id'}) {
+        my $scope = $env{'request.course.id'};
+        if ((&Apache::lonnet::allowed('pav',$scope)) ||
+            (&Apache::lonnet::allowed('pfo',$scope))) {
+            return;
+        }
+        if ($env{'request.course.sec'} ne '') {
+            $scope .= "/$env{'request.course.sec'}";
+            if ((&Apache::lonnet::allowed('pav',$scope)) ||
+                (&Apache::lonnet::allowed('pfo',$scope))) {
+                return;
+            }
+        }
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        my $blocked = &blocking_status('printout',$cnum,$cdom);
+        if ($blocked) {
+            my $checkrole = "cm./$cdom/$cnum";
+            if ($env{'request.course.sec'} ne '') {
+                $checkrole .= "/$env{'request.course.sec'}";
+            }
+            unless ((&Apache::lonnet::allowed('evb',undef,undef,$checkrole)) &&
+                    ($env{'request.role'} !~ m{^st\./$cdom/$cnum})) {
+                $noprint = 1;
+            }
+        }
+        unless ($noprint) {
+            my $symb = &Apache::lonnet::symbread();
+            if ($symb ne '') {
+                my $navmap = Apache::lonnavmaps::navmap->new();
+                if (ref($navmap)) {
+                    my $res = $navmap->getBySymb($symb);
+                    if (ref($res)) {
+                        if (!$res->resprintable()) {
+                            $noprint = 1;
+                        }
+                    }
+                }
+            }
+        }
+        if ($noprint) {
+            return <<"ENDSTYLE";
+<style type="text/css" media="print">
+    body { display:none }
+</style>
+ENDSTYLE
+        }
+    }
+    return;
+}
+
+=pod
+
 =item * &xml_begin()
 
 Returns the needed doctype and <html>
@@ -7058,6 +7387,8 @@ $args - additional optional args support
                                     current page
              bread_crumbs ->             Array containing breadcrumbs
              bread_crumbs_component ->  if exists show it as headline else show only the breadcrumbs
+             group          -> includes the current group, if page is for a 
+                               specific group  
 
 =back
 
@@ -7070,7 +7401,7 @@ sub start_page {
     #&Apache::lonnet::logthis("start_page ".join(':',caller(0)));
 
     $env{'internal.start_page'}++;
-    my $result;
+    my ($result,@advtools);
 
     if (! exists($args->{'skip_phases'}{'head'}) ) {
         $result .= &xml_begin() . &headtag($title, $head_extra, $args);
@@ -7087,7 +7418,8 @@ sub start_page {
                          $args->{'function'},       $args->{'add_entries'},
                          $args->{'only_body'},      $args->{'domain'},
                          $args->{'force_register'}, $args->{'no_nav_bar'},
-                         $args->{'bgcolor'},        $args);
+                         $args->{'bgcolor'},        $args,
+                         \@advtools);
         }
     }
 
@@ -7116,6 +7448,10 @@ sub start_page {
 				&Apache::lonhtmlcommon::add_breadcrumb($crumb);
 			}
 		}
+                # if @advtools array contains items add then to the breadcrumbs
+                if (@advtools > 0) {
+                    &Apache::lonmenu::advtools_crumbs(@advtools);
+                }
 
 		#if bread_crumbs_component exists show it as headline else show only the breadcrumbs
 		if(exists($args->{'bread_crumbs_component'})){
@@ -7144,7 +7480,9 @@ sub end_page {
     } else {
 	$result .= &endbodytag($args);
     }
-    $result .= "\n</html>";
+    unless ($args->{'notbody'}) {
+        $result .= "\n</html>";
+    }
 
     if ($args->{'js_ready'}) {
 	$result = &js_ready($result);
@@ -7229,8 +7567,14 @@ sub modal_link {
     unless ($width) { $width=480; }
     unless ($height) { $height=400; }
     unless ($scrolling) { $scrolling='yes'; }
-    return '<a href="'.$link.'" target="'.$target.'" title="'.$title.'" onclick="openMyModal(\''.$link.'\','.$width.','.$height.',\''.$scrolling.'\'); return false;">'.
-           $linktext.'</a>';
+    my $target_attr;
+    if (defined($target)) {
+        $target_attr = 'target="'.$target.'"';
+    }
+    return <<"ENDLINK";
+<a href="$link" $target_attr title="$title" onclick="javascript:openMyModal('$link',$width,$height,'$scrolling'); return false;">
+           $linktext</a>
+ENDLINK
 }
 
 sub modal_adhoc_script {
@@ -7478,16 +7822,21 @@ sub validate_page {
 
 
 sub start_scrollbox {
-    my ($outerwidth,$width,$height,$id)=@_;
+    my ($outerwidth,$width,$height,$id,$bgcolor)=@_;
     unless ($outerwidth) { $outerwidth='520px'; }
     unless ($width) { $width='500px'; }
     unless ($height) { $height='200px'; }
-    my ($table_id,$div_id);
+    my ($table_id,$div_id,$tdcol);
     if ($id ne '') {
         $table_id = " id='table_$id'";
         $div_id = " id='div_$id'";
     }
-    return "<table style='width: $outerwidth; border: 1px solid none;'$table_id><tr><td style='width: $width;' bgcolor='#FFFFFF'><div style='overflow:auto; width:$width; height: $height;'$div_id>";
+    if ($bgcolor ne '') {
+        $tdcol = "background-color: $bgcolor;";
+    }
+    return <<"END";
+<table style="width: $outerwidth; border: 1px solid none;"$table_id><tr><td style="width: $width;$tdcol"><div style="overflow:auto; width:$width; height: $height;"$div_id>
+END
 }
 
 sub end_scrollbox {
@@ -7498,7 +7847,7 @@ sub simple_error_page {
     my ($r,$title,$msg) = @_;
     my $page =
 	&Apache::loncommon::start_page($title).
-	&mt($msg).
+	'<span class="LC_warning">'.&mt($msg).'</span>'.
 	&Apache::loncommon::end_page();
     if (ref($r)) {
 	$r->print($page);
@@ -7713,8 +8062,7 @@ role status: active, previous or future.
 
 sub check_user_status {
     my ($udom,$uname,$cdom,$crs,$role,$sec) = @_;
-    my $extra = &Apache::lonnet::freeze_escape({'skipcheck' => 1});
-    my %userinfo = &Apache::lonnet::dump('roles',$udom,$uname,'.',undef,$extra);
+    my %userinfo = &Apache::lonnet::dump('roles',$udom,$uname);
     my @uroles = keys %userinfo;
     my $srchstr;
     my $active_chk = 'none';
@@ -9085,13 +9433,24 @@ sub get_env_multiple {
 
 sub ask_for_embedded_content {
     my ($actionurl,$state,$allfiles,$codebase,$args)=@_;
-    my (%subdependencies,%dependencies,%mapping,%existing,%newfiles,%pathchanges);
-    my $num = 0;
+    my (%subdependencies,%dependencies,%mapping,%existing,%newfiles,%pathchanges,
+        %currsubfile,%unused,$rem);
+    my $counter = 0;
+    my $numnew = 0;
     my $numremref = 0;
     my $numinvalid = 0;
     my $numpathchg = 0;
     my $numexisting = 0;
-    my ($output,$upload_output,$toplevel,$url,$udom,$uname,$getpropath);
+    my $numunused = 0;
+    my ($output,$upload_output,$toplevel,$url,$udom,$uname,$getpropath,$cdom,$cnum,
+        $fileloc,$filename,$delete_output,$modify_output,$title,$symb,$path);
+    my $heading = &mt('Upload embedded files');
+    my $buttontext = &mt('Upload');
+
+    my $navmap;
+    if ($env{'request.course.id'}) {
+        $navmap = Apache::lonnavmaps::navmap->new();
+    }
     if (($actionurl eq '/adm/portfolio') || ($actionurl eq '/adm/coursegrp_portfolio')) {
         my $current_path='/';
         if ($env{'form.currentpath'}) {
@@ -9119,8 +9478,32 @@ sub ask_for_embedded_content {
         }
     } elsif ($actionurl eq '/adm/coursedocs') {
         if (ref($args) eq 'HASH') {
-           $url = $args->{'docs_url'};
-           $toplevel = $url;
+            $url = $args->{'docs_url'};
+            $toplevel = $url;
+            if ($args->{'context'} eq 'paste') {
+                ($cdom,$cnum) = ($url =~ m{^\Q/uploaded/\E($match_domain)/($match_courseid)/});
+                ($path) = 
+                    ($toplevel =~ m{^(\Q/uploaded/$cdom/$cnum/\E(?:docs|supplemental)/(?:default|\d+)/\d+)/});
+                $fileloc = &Apache::lonnet::filelocation('',$toplevel);
+                $fileloc =~ s{^/}{};
+            }
+        }
+    } elsif ($actionurl eq '/adm/dependencies')  {
+        if ($env{'request.course.id'} ne '') {
+            $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+            $cnum =  $env{'course.'.$env{'request.course.id'}.'.num'};
+            if (ref($args) eq 'HASH') {
+                $url = $args->{'docs_url'};
+                $title = $args->{'docs_title'};
+                $toplevel = "/$url";
+                ($rem) = ($toplevel =~ m{^(.+/)[^/]+$});
+                ($path) =  
+                    ($toplevel =~ m{^(\Q/uploaded/$cdom/$cnum/\E(?:docs|supplemental)/(?:default|\d+)/\d+)/});
+                $fileloc = &Apache::lonnet::filelocation('',$toplevel);
+                $fileloc =~ s{^/}{};
+                ($filename) = ($fileloc =~ m{.+/([^/]+)$});
+                $heading = &mt('Status of dependencies in [_1]',"$title ($filename)");
+            }
         }
     }
     my $now = time();
@@ -9159,25 +9542,46 @@ sub ask_for_embedded_content {
             }
         }
     }
+    my $dirptr = 16384;
     foreach my $path (keys(%subdependencies)) {
-        my %currsubfile;
+        $currsubfile{$path} = {};
         if (($actionurl eq '/adm/portfolio') || ($actionurl eq '/adm/coursegrp_portfolio')) { 
             my ($sublistref,$listerror) =
                 &Apache::lonnet::dirlist($url.$path,$udom,$uname,$getpropath);
             if (ref($sublistref) eq 'ARRAY') {
                 foreach my $line (@{$sublistref}) {
                     my ($file_name,$rest) = split(/\&/,$line,2);
-                    $currsubfile{$file_name} = 1;
+                    $currsubfile{$path}{$file_name} = 1;
                 }
             }
         } elsif (($actionurl eq '/adm/upload') || ($actionurl eq '/adm/testbank')) {
             if (opendir(my $dir,$url.'/'.$path)) {
                 my @subdir_list = grep(!/^\./,readdir($dir));
-                map {$currsubfile{$_} = 1;} @subdir_list;
+                map {$currsubfile{$path}{$_} = 1;} @subdir_list;
+            }
+        } elsif (($actionurl eq '/adm/dependencies') ||
+                 (($actionurl eq '/adm/coursedocs') && (ref($args) eq 'HASH') &&
+                  ($args->{'context'} eq 'paste'))) {
+            if ($env{'request.course.id'} ne '') {
+                my ($dir) = ($fileloc =~ m{^(.+/)[^/]+$});
+                if ($dir ne '') {
+                    my ($sublistref,$listerror) =
+                        &Apache::lonnet::dirlist($dir.$path,$cdom,$cnum,$getpropath,undef,'/');
+                    if (ref($sublistref) eq 'ARRAY') {
+                        foreach my $line (@{$sublistref}) {
+                            my ($file_name,$dom,undef,$testdir,undef,undef,undef,undef,$size,
+                                undef,$mtime)=split(/\&/,$line,12);
+                            unless (($testdir&$dirptr) ||
+                                    ($file_name =~ /^\.\.?$/)) {
+                                $currsubfile{$path}{$file_name} = [$size,$mtime];
+                            }
+                        }
+                    }
+                }
             }
         }
         foreach my $file (keys(%{$subdependencies{$path}})) {
-            if ($currsubfile{$file}) {
+            if (exists($currsubfile{$path}{$file})) {
                 my $item = $path.'/'.$file;
                 unless ($mapping{$item} eq $item) {
                     $pathchanges{$item} = 1;
@@ -9188,6 +9592,23 @@ sub ask_for_embedded_content {
                 $newfiles{$path.'/'.$file} = 1;
             }
         }
+        if ($actionurl eq '/adm/dependencies') {
+            foreach my $path (keys(%currsubfile)) {
+                if (ref($currsubfile{$path}) eq 'HASH') {
+                    foreach my $file (keys(%{$currsubfile{$path}})) {
+                         unless ($subdependencies{$path}{$file}) {
+                             next if (($rem ne '') &&
+                                      (($env{"httpref.$rem"."$path/$file"} ne '') ||
+                                       (ref($navmap) &&
+                                       (($navmap->getResourceByUrl($rem."$path/$file") ne '') ||
+                                        (($file =~ /^(.*\.s?html?)\.bak$/i) &&
+                                         ($navmap->getResourceByUrl($rem."$path/$1")))))));
+                             $unused{$path.'/'.$file} = 1; 
+                         }
+                    }
+                }
+            }
+        }
     }
     my %currfile;
     if (($actionurl eq '/adm/portfolio') || ($actionurl eq '/adm/coursegrp_portfolio')) {
@@ -9204,9 +9625,29 @@ sub ask_for_embedded_content {
             my @dir_list = grep(!/^\./,readdir($dir));
             map {$currfile{$_} = 1;} @dir_list;
         }
+    } elsif (($actionurl eq '/adm/dependencies') ||
+             (($actionurl eq '/adm/coursedocs') && (ref($args) eq 'HASH') &&
+              ($args->{'context'} eq 'paste'))) {
+        if ($env{'request.course.id'} ne '') {
+            my ($dir) = ($fileloc =~ m{^(.+/)[^/]+$});
+            if ($dir ne '') {
+                my ($dirlistref,$listerror) =
+                    &Apache::lonnet::dirlist($dir,$cdom,$cnum,$getpropath,undef,'/');
+                if (ref($dirlistref) eq 'ARRAY') {
+                    foreach my $line (@{$dirlistref}) {
+                        my ($file_name,$dom,undef,$testdir,undef,undef,undef,undef,
+                            $size,undef,$mtime)=split(/\&/,$line,12);
+                        unless (($testdir&$dirptr) ||
+                                ($file_name =~ /^\.\.?$/)) {
+                            $currfile{$file_name} = [$size,$mtime];
+                        }
+                    }
+                }
+            }
+        }
     }
     foreach my $file (keys(%dependencies)) {
-        if ($currfile{$file}) {
+        if (exists($currfile{$file})) {
             unless ($mapping{$file} eq $file) {
                 $pathchanges{$file} = 1;
             }
@@ -9216,41 +9657,124 @@ sub ask_for_embedded_content {
             $newfiles{$file} = 1;
         }
     }
+    foreach my $file (keys(%currfile)) {
+        unless (($file eq $filename) ||
+                ($file eq $filename.'.bak') ||
+                ($dependencies{$file})) {
+            if ($actionurl eq '/adm/dependencies') {
+                next if (($rem ne '') &&
+                         (($env{"httpref.$rem".$file} ne '') ||
+                          (ref($navmap) &&
+                          (($navmap->getResourceByUrl($rem.$file) ne '') ||
+                           (($file =~ /^(.*\.s?html?)\.bak$/i) &&
+                            ($navmap->getResourceByUrl($rem.$1)))))));
+            }
+            $unused{$file} = 1;
+        }
+    }
+    if (($actionurl eq '/adm/coursedocs') && (ref($args) eq 'HASH') &&
+        ($args->{'context'} eq 'paste')) {
+        $counter = scalar(keys(%existing));
+        $numpathchg = scalar(keys(%pathchanges));
+        return ($output,$counter,$numpathchg,\%existing); 
+    }
     foreach my $embed_file (sort {lc($a) cmp lc($b)} keys(%newfiles)) {
+        if ($actionurl eq '/adm/dependencies') {
+            next if ($embed_file =~ m{^\w+://});
+        }
         $upload_output .= &start_data_table_row().
-                          '<td><span class="LC_filename">'.$embed_file.'</span>';
+                          '<td><img src="'.&icon($embed_file).'" />&nbsp;'.
+                          '<span class="LC_filename">'.$embed_file.'</span>';
         unless ($mapping{$embed_file} eq $embed_file) {
             $upload_output .= '<br /><span class="LC_info" style="font-size:smaller;">'.&mt('changed from: [_1]',$mapping{$embed_file}).'</span>';
         }
         $upload_output .= '</td><td>';
-        if ($args->{'ignore_remote_references'}
-            && $embed_file =~ m{^\w+://}) {
+        if ($args->{'ignore_remote_references'} && $embed_file =~ m{^\w+://}) { 
             $upload_output.='<span class="LC_warning">'.&mt("URL points to other server.").'</span>';
             $numremref++;
         } elsif ($args->{'error_on_invalid_names'}
             && $embed_file ne &Apache::lonnet::clean_filename($embed_file,{'keep_path' => 1,})) {
-
             $upload_output.='<span class="LC_warning">'.&mt('Invalid characters').'</span>';
             $numinvalid++;
         } else {
-            $upload_output .= &embedded_file_element('upload_embedded',$num,
+            $upload_output .= &embedded_file_element('upload_embedded',$counter,
                                                      $embed_file,\%mapping,
-                                                     $allfiles,$codebase);
-            $num++;
+                                                     $allfiles,$codebase,'upload');
+            $counter ++;
+            $numnew ++;
         }
         $upload_output .= '</td>'.&Apache::loncommon::end_data_table_row()."\n";
     }
     foreach my $embed_file (sort {lc($a) cmp lc($b)} keys(%existing)) {
-        $upload_output .= &start_data_table_row().
-                          '<td><span class="LC_filename">'.$embed_file.'</span></td>'.
-                          '<td><span class="LC_warning">'.&mt('Already exists').'</span></td>'.
-                          &Apache::loncommon::end_data_table_row()."\n";
+        if ($actionurl eq '/adm/dependencies') {
+            my ($size,$mtime) = &get_dependency_details(\%currfile,\%currsubfile,$embed_file);
+            $modify_output .= &start_data_table_row().
+                              '<td><a href="'.$path.'/'.$embed_file.'" style="text-decoration:none;">'.
+                              '<img src="'.&icon($embed_file).'" border="0" />'.
+                              '&nbsp;<span class="LC_filename">'.$embed_file.'</span></a></td>'.
+                              '<td>'.$size.'</td>'.
+                              '<td>'.$mtime.'</td>'.
+                              '<td><label><input type="checkbox" name="mod_upload_dep" '.
+                              'onclick="toggleBrowse('."'$counter'".')" id="mod_upload_dep_'.
+                              $counter.'" value="'.$counter.'" />'.&mt('Yes').'</label>'.
+                              '<div id="moduploaddep_'.$counter.'" style="display:none;">'.
+                              &embedded_file_element('upload_embedded',$counter,
+                                                     $embed_file,\%mapping,
+                                                     $allfiles,$codebase,'modify').
+                              '</div></td>'.
+                              &end_data_table_row()."\n";
+            $counter ++;
+        } else {
+            $upload_output .= &start_data_table_row().
+                              '<td><span class="LC_filename">'.$embed_file.'</span></td>';
+                              '<td><span class="LC_warning">'.&mt('Already exists').'</span></td>'.
+                              &Apache::loncommon::end_data_table_row()."\n";
+        }
+    }
+    my $delidx = $counter;
+    foreach my $oldfile (sort {lc($a) cmp lc($b)} keys(%unused)) {
+        my ($size,$mtime) = &get_dependency_details(\%currfile,\%currsubfile,$oldfile);
+        $delete_output .= &start_data_table_row().
+                          '<td><img src="'.&icon($oldfile).'" />'.
+                          '&nbsp;<span class="LC_filename">'.$oldfile.'</span></td>'.
+                          '<td>'.$size.'</td>'.
+                          '<td>'.$mtime.'</td>'.
+                          '<td><label><input type="checkbox" name="del_upload_dep" '.
+                          ' value="'.$delidx.'" />'.&mt('Yes').'</label>'.
+                          &embedded_file_element('upload_embedded',$delidx,
+                                                 $oldfile,\%mapping,$allfiles,
+                                                 $codebase,'delete').'</td>'.
+                          &end_data_table_row()."\n"; 
+        $numunused ++;
+        $delidx ++;
     }
     if ($upload_output) {
         $upload_output = &start_data_table().
                          $upload_output.
                          &end_data_table()."\n";
     }
+    if ($modify_output) {
+        $modify_output = &start_data_table().
+                         &start_data_table_header_row().
+                         '<th>'.&mt('File').'</th>'.
+                         '<th>'.&mt('Size (KB)').'</th>'.
+                         '<th>'.&mt('Modified').'</th>'.
+                         '<th>'.&mt('Upload replacement?').'</th>'.
+                         &end_data_table_header_row().
+                         $modify_output.
+                         &end_data_table()."\n";
+    }
+    if ($delete_output) {
+        $delete_output = &start_data_table().
+                         &start_data_table_header_row().
+                         '<th>'.&mt('File').'</th>'.
+                         '<th>'.&mt('Size (KB)').'</th>'.
+                         '<th>'.&mt('Modified').'</th>'.
+                         '<th>'.&mt('Delete?').'</th>'.
+                         &end_data_table_header_row().
+                         $delete_output.
+                         &end_data_table()."\n";
+    }
     my $applies = 0;
     if ($numremref) {
         $applies ++;
@@ -9261,15 +9785,37 @@ sub ask_for_embedded_content {
     if ($numexisting) {
         $applies ++;
     }
-    if ($num) {
+    if ($counter || $numunused) {
         $output = '<form name="upload_embedded" action="'.$actionurl.'"'.
                   ' method="post" enctype="multipart/form-data">'."\n".
-                  $state.
-                  '<h3>'.&mt('Upload embedded files').
-                  ':</h3>'.$upload_output.'<br />'."\n".
-                  '<input type ="hidden" name="number_embedded_items" value="'.
-                  $num.'" />'."\n";
-        if ($actionurl eq '') {
+                  $state.'<h3>'.$heading.'</h3>'; 
+        if ($actionurl eq '/adm/dependencies') {
+            if ($numnew) {
+                $output .= '<h4>'.&mt('Missing dependencies').'</h4>'.
+                           '<p>'.&mt('The following files need to be uploaded.').'</p>'."\n".
+                           $upload_output.'<br />'."\n";
+            }
+            if ($numexisting) {
+                $output .= '<h4>'.&mt('Uploaded dependencies (in use)').'</h4>'.
+                           '<p>'.&mt('Upload a new file to replace the one currently in use.').'</p>'."\n".
+                           $modify_output.'<br />'."\n";
+                           $buttontext = &mt('Save changes');
+            }
+            if ($numunused) {
+                $output .= '<h4>'.&mt('Unused files').'</h4>'.
+                           '<p>'.&mt('The following uploaded files are no longer used.').'</p>'."\n".
+                           $delete_output.'<br />'."\n";
+                           $buttontext = &mt('Save changes');
+            }
+        } else {
+            $output .= $upload_output.'<br />'."\n";
+        }
+        $output .= '<input type ="hidden" name="number_embedded_items" value="'.
+                   $counter.'" />'."\n";
+        if ($actionurl eq '/adm/dependencies') { 
+            $output .= '<input type ="hidden" name="number_newemb_items" value="'.
+                       $numnew.'" />'."\n";
+        } elsif ($actionurl eq '') {
             $output .=  '<input type="hidden" name="phase" value="three" />';
         }
     } elsif ($applies) {
@@ -9297,13 +9843,13 @@ sub ask_for_embedded_content {
         $output .= $upload_output.'<br />';
     }
     my ($pathchange_output,$chgcount);
-    $chgcount = $num;
+    $chgcount = $counter;
     if (keys(%pathchanges) > 0) {
         foreach my $embed_file (sort {lc($a) cmp lc($b)} keys(%pathchanges)) {
-            if ($num) {
+            if ($counter) {
                 $output .= &embedded_file_element('pathchange',$chgcount,
                                                   $embed_file,\%mapping,
-                                                  $allfiles,$codebase);
+                                                  $allfiles,$codebase,'change');
             } else {
                 $pathchange_output .= 
                     &start_data_table_row().
@@ -9312,14 +9858,14 @@ sub ask_for_embedded_content {
                     '<td>'.$mapping{$embed_file}.'</td>'.
                     '<td>'.$embed_file.
                     &embedded_file_element('pathchange',$numpathchg,$embed_file,
-                                           \%mapping,$allfiles,$codebase).
+                                           \%mapping,$allfiles,$codebase,'change').
                     '</td>'.&end_data_table_row();
             }
             $numpathchg ++;
             $chgcount ++;
         }
     }
-    if ($num) {
+    if ($counter) {
         if ($numpathchg) {
             $output .= '<input type ="hidden" name="number_pathchange_items" value="'.
                        $numpathchg.'" />'."\n";
@@ -9329,9 +9875,10 @@ sub ask_for_embedded_content {
             $output .= '<input type="hidden" name="phase" value="three" />'."\n";
         } elsif ($actionurl eq '/adm/portfolio' || $actionurl eq '/adm/coursegrp_portfolio') {
             $output .= '<input type="hidden" name="action" value="upload_embedded" />';
+        } elsif ($actionurl eq '/adm/dependencies') {
+            $output .= '<input type="hidden" name="action" value="process_changes" />';
         }
-        $output .=  '<input type ="submit" value="'.&mt('Upload Listed Files').'" />'."\n".
-                    &mt('(only files for which a location has been provided will be uploaded)').'</form>'."\n";
+        $output .=  '<input type ="submit" value="'.$buttontext.'" />'."\n".'</form>'."\n";
     } elsif ($numpathchg) {
         my %pathchange = ();
         $output .= &modify_html_form('pathchange',$actionurl,$state,\%pathchange,$pathchange_output);
@@ -9339,15 +9886,15 @@ sub ask_for_embedded_content {
             $output .= '<p>'.&mt('or').'</p>'; 
         } 
     }
-    return ($output,$num,$numpathchg);
+    return ($output,$counter,$numpathchg);
 }
 
 sub embedded_file_element {
-    my ($context,$num,$embed_file,$mapping,$allfiles,$codebase) = @_;
+    my ($context,$num,$embed_file,$mapping,$allfiles,$codebase,$type) = @_;
     return unless ((ref($mapping) eq 'HASH') && (ref($allfiles) eq 'HASH') &&
                    (ref($codebase) eq 'HASH'));
     my $output;
-    if ($context eq 'upload_embedded') {
+    if (($context eq 'upload_embedded') && ($type ne 'delete')) {
        $output = '<input name="embedded_item_'.$num.'" type="file" value="" />'."\n";
     }
     $output .= '<input name="embedded_orig_'.$num.'" type="hidden" value="'.
@@ -9374,6 +9921,50 @@ sub embedded_file_element {
     return $output;
 }
 
+sub get_dependency_details {
+    my ($currfile,$currsubfile,$embed_file) = @_;
+    my ($size,$mtime,$showsize,$showmtime);
+    if ((ref($currfile) eq 'HASH') && (ref($currsubfile))) {
+        if ($embed_file =~ m{/}) {
+            my ($path,$fname) = split(/\//,$embed_file);
+            if (ref($currsubfile->{$path}{$fname}) eq 'ARRAY') {
+                ($size,$mtime) = @{$currsubfile->{$path}{$fname}};
+            }
+        } else {
+            if (ref($currfile->{$embed_file}) eq 'ARRAY') {
+                ($size,$mtime) = @{$currfile->{$embed_file}};
+            }
+        }
+        $showsize = $size/1024.0;
+        $showsize = sprintf("%.1f",$showsize);
+        if ($mtime > 0) {
+            $showmtime = &Apache::lonlocal::locallocaltime($mtime);
+        }
+    }
+    return ($showsize,$showmtime);
+}
+
+sub ask_embedded_js {
+    return <<"END";
+<script type="text/javascript"">
+// <![CDATA[
+function toggleBrowse(counter) {
+    var chkboxid = document.getElementById('mod_upload_dep_'+counter);
+    var fileid = document.getElementById('embedded_item_'+counter);
+    var uploaddivid = document.getElementById('moduploaddep_'+counter);
+    if (chkboxid.checked == true) {
+        uploaddivid.style.display='block';
+    } else {
+        uploaddivid.style.display='none';
+        fileid.value = '';
+    }
+}
+// ]]>
+</script>
+
+END
+}
+
 sub upload_embedded {
     my ($context,$dirpath,$uname,$udom,$dir_root,$url_root,$group,$disk_quota,
         $current_disk_usage,$hiddenstate,$actionurl) = @_;
@@ -9432,7 +10023,6 @@ sub upload_embedded {
             $output .= &mt('File name not allowed - rename the file to remove the number immediately before the file extension([_1]) and re-upload.',$2).'<br />';
             next;
         }
-
         $env{'form.embedded_item_'.$i.'.filename'}=$fname;
         if ($context eq 'portfolio') {
             my $result;
@@ -9489,13 +10079,15 @@ sub upload_embedded {
             if (!open($fh,'>'.$dest)) {
                 &Apache::lonnet::logthis('Failed to create '.$dest);
                 $output .= '<span class="LC_error">'.
-                           &mt('An error occurred while trying to upload [_1] for embedded element [_2].',$orig_uploaded_filename,$env{'form.embedded_orig_'.$i}).
+                           &mt('An error occurred while trying to upload [_1] for embedded element [_2].',
+                               $orig_uploaded_filename,$env{'form.embedded_orig_'.$i}).
                            '</span><br />';
             } else {
                 if (!print $fh $env{'form.embedded_item_'.$i}) {
                     &Apache::lonnet::logthis('Failed to write to '.$dest);
                     $output .= '<span class="LC_error">'.
-                              &mt('An error occurred while writing the file [_1] for embedded element [_2].',$orig_uploaded_filename,$env{'form.embedded_orig_'.$i}).
+                              &mt('An error occurred while writing the file [_1] for embedded element [_2].',
+                                  $orig_uploaded_filename,$env{'form.embedded_orig_'.$i}).
                               '</span><br />';
                 } else {
                     $output .= &mt('Uploaded [_1]','<span class="LC_filename">'.
@@ -9517,15 +10109,17 @@ sub upload_embedded {
     }
     $output .= &modify_html_form('upload_embedded',$actionurl,$hiddenstate,\%pathchange);
     $returnflag = 'ok';
-    if (keys(%pathchange) > 0) {
+    my $numpathchgs = scalar(keys(%pathchange));
+    if ($numpathchgs > 0) {
         if ($context eq 'portfolio') {
             $output .= '<p>'.&mt('or').'</p>';
         } elsif ($context eq 'testbank') {
-            $output .=  '<p>'.&mt('Or [_1]continue[_2] the testbank import without modifying the reference(s).','<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
+            $output .=  '<p>'.&mt('Or [_1]continue[_2] the testbank import without modifying the reference(s).',
+                                  '<a href="javascript:document.testbankForm.submit();">','</a>').'</p>';
             $returnflag = 'modify_orightml';
         }
     }
-    return ($output.$footer,$returnflag);
+    return ($output.$footer,$returnflag,$numpathchgs);
 }
 
 sub modify_html_form {
@@ -9560,7 +10154,7 @@ sub modify_html_form {
                     '<input type="hidden" name="embedded_orig_'.$i.'" value="'.
                     &escape($env{'form.embedded_orig_'.$i}).'" /></td>'.
                     &end_data_table_row();
-            } 
+            }
         }
     } else {
         $modifyform = $pathchgtable;
@@ -9571,6 +10165,9 @@ sub modify_html_form {
         }
     }
     if ($modifyform) {
+        if ($actionurl eq '/adm/dependencies') {
+            $hiddenstate .= '<input type="hidden" name="action" value="modifyhrefs" />';
+        }
         return '<h3>'.&mt('Changes in content of HTML file required').'</h3>'."\n".
                '<p>'.&mt('Changes need to be made to the reference(s) used for one or more of the dependencies, if your HTML file is to work correctly:').'<ol>'."\n".
                '<li>'.&mt('For consistency between the reference(s) and the location of the corresponding stored file within LON-CAPA.').'</li>'."\n".
@@ -9599,23 +10196,55 @@ sub modify_html_refs {
         $container = $env{'form.container'};
     } elsif ($context eq 'coursedoc') {
         $container = $env{'form.primaryurl'};
+    } elsif ($context eq 'manage_dependencies') {
+        (undef,undef,$container) = &Apache::lonnet::decode_symb($env{'form.symb'});
+        $container = "/$container";
     } else {
         $container = $Apache::lonnet::perlvar{'lonDocRoot'}.$env{'form.filename'};
     }
     my (%allfiles,%codebase,$output,$content);
     my @changes = &get_env_multiple('form.namechange');
-    return unless (@changes > 0);
-    if (($context eq 'portfolio') || ($context eq 'coursedoc')) {
-        return unless ($container =~ m{^/uploaded/\Q$udom\E/\Q$uname\E/});
+    unless (@changes > 0) {
+        if (wantarray) {
+            return ('',0,0); 
+        } else {
+            return;
+        }
+    }
+    if (($context eq 'portfolio') || ($context eq 'coursedoc') || 
+        ($context eq 'manage_dependencies')) {
+        unless ($container =~ m{^/uploaded/\Q$udom\E/\Q$uname\E/}) {
+            if (wantarray) {
+                return ('',0,0);
+            } else {
+                return;
+            }
+        } 
         $content = &Apache::lonnet::getfile($container);
-        return if ($content eq '-1');
+        if ($content eq '-1') {
+            if (wantarray) {
+                return ('',0,0);
+            } else {
+                return;
+            }
+        }
     } else {
-        return unless ($container =~ /^\Q$dir_root\E/); 
+        unless ($container =~ /^\Q$dir_root\E/) {
+            if (wantarray) {
+                return ('',0,0);
+            } else {
+                return;
+            }
+        } 
         if (open(my $fh,"<$container")) {
             $content = join('', <$fh>);
             close($fh);
         } else {
-            return;
+            if (wantarray) {
+                return ('',0,0);
+            } else {
+                return;
+            }
         }
     }
     my ($count,$codebasecount) = (0,0);
@@ -9649,13 +10278,14 @@ sub modify_html_refs {
             }
             if ($count || $codebasecount) {
                 my $saveresult;
-                if ($context eq 'portfolio' || $context eq 'coursedoc') {
+                if (($context eq 'portfolio') || ($context eq 'coursedoc') || 
+                    ($context eq 'manage_dependencies')) {
                     my $url = &Apache::lonnet::store_edited_file($container,$content,$udom,$uname,\$saveresult);
                     if ($url eq $container) {
                         my ($fname) = ($container =~ m{/([^/]+)$});
                         $output = '<p>'.&mt('Updated [quant,_1,reference] in [_2].',
                                             $count,'<span class="LC_filename">'.
-                                            $fname.'</span>').'</p>'; 
+                                            $fname.'</span>').'</p>';
                     } else {
                          $output = '<p class="LC_error">'.
                                    &mt('Error: update failed for: [_1].',
@@ -9682,7 +10312,11 @@ sub modify_html_refs {
                      ' to modify references: '.$parse_result);
         }
     }
-    return $output;
+    if (wantarray) {
+        return ($output,$count,$codebasecount);
+    } else {
+        return $output;
+    }
 }
 
 sub check_for_existing {
@@ -9849,43 +10483,226 @@ sub is_archive_file {
 }
 
 sub decompress_form {
-    my ($mimetype,$archiveurl,$action,$noextract,$hiddenelements) = @_;
+    my ($mimetype,$archiveurl,$action,$noextract,$hiddenelements,$dirlist) = @_;
     my %lt = &Apache::lonlocal::texthash (
         this => 'This file is an archive file.',
+        camt => 'This file is a Camtasia archive file.',
+        itsc => 'Its contents are as follows:',
         youm => 'You may wish to extract its contents.',
-        camt => 'Extraction of contents is recommended for Camtasia zip files.',
-        perm => 'Permanently remove archive file after extraction of contents?',
         extr => 'Extract contents',
+        auto => 'LON-CAPA can process the files automatically, or you can decide how each should be handled.',
+        proa => 'Process automatically?',
         yes  => 'Yes',
         no   => 'No',
+        fold => 'Title for folder containing movie',
+        movi => 'Title for page containing embedded movie', 
     );
-    my $output = '<p>'.$lt{'this'}.' '.$lt{'youm'}.'<br />';
+    my $fileloc = &Apache::lonnet::filelocation(undef,$archiveurl);
+    my ($is_camtasia,$topdir,%toplevel,@paths);
+    my $info = &list_archive_contents($fileloc,\@paths);
+    if (@paths) {
+        foreach my $path (@paths) {
+            $path =~ s{^/}{};
+            if ($path =~ m{^([^/]+)/$}) {
+                $topdir = $1;
+            }
+            if ($path =~ m{^([^/]+)/}) {
+                $toplevel{$1} = $path;
+            } else {
+                $toplevel{$path} = $path;
+            }
+        }
+    }
     if ($mimetype =~ m{^application/(x\-)?(compressed|zip)}) {
-        $output .= $lt{'camt'};
+        my @camtasia = ("$topdir/","$topdir/index.html",
+                        "$topdir/media/",
+                        "$topdir/media/$topdir.mp4",
+                        "$topdir/media/FirstFrame.png",
+                        "$topdir/media/player.swf",
+                        "$topdir/media/swfobject.js",
+                        "$topdir/media/expressInstall.swf");
+        my @diffs = &compare_arrays(\@paths,\@camtasia);
+        if (@diffs == 0) {
+            $is_camtasia = 1;
+        }
     }
-    $output .= '</p>';
-    $output .= <<"START";
-<div id="uploadfileresult">
-  <form name="uploaded_decompress" action="$action" method="post">
-  <input type="hidden" name="archiveurl" value="$archiveurl" />
-START
+    my $output;
+    if ($is_camtasia) {
+        $output = <<"ENDCAM";
+<script type="text/javascript" language="Javascript">
+// <![CDATA[
+
+function camtasiaToggle() {
+    for (var i=0; i<document.uploaded_decompress.autoextract_camtasia.length; i++) {
+        if (document.uploaded_decompress.autoextract_camtasia[i].checked) {
+            if (document.uploaded_decompress.autoextract_camtasia[i].value == 1) {
+
+                document.getElementById('camtasia_titles').style.display='block';
+            } else {
+                document.getElementById('camtasia_titles').style.display='none';
+            }
+        }
+    }
+    return;
+}
+
+// ]]>
+</script>
+<p>$lt{'camt'}</p>
+ENDCAM
+    } else {
+        $output = '<p>'.$lt{'this'};
+        if ($info eq '') {
+            $output .= ' '.$lt{'youm'}.'</p>'."\n";
+        } else {
+            $output .= ' '.$lt{'itsc'}.'</p>'."\n".
+                       '<div><pre>'.$info.'</pre></div>';
+        }
+    }
+    $output .= '<form name="uploaded_decompress" action="'.$action.'" method="post">'."\n";
+    my $duplicates;
+    my $num = 0;
+    if (ref($dirlist) eq 'ARRAY') {
+        foreach my $item (@{$dirlist}) {
+            if (ref($item) eq 'ARRAY') {
+                if (exists($toplevel{$item->[0]})) {
+                    $duplicates .= 
+                        &start_data_table_row().
+                        '<td><label><input type="radio" name="archive_overwrite_'.$num.'" '.
+                        'value="0" checked="checked" />'.&mt('No').'</label>'.
+                        '&nbsp;<label><input type="radio" name="archive_overwrite_'.$num.'" '.
+                        'value="1" />'.&mt('Yes').'</label>'.
+                        '<input type="hidden" name="archive_overwrite_name_'.$num.'" value="'.$item->[0].'" /></td>'."\n".
+                        '<td>'.$item->[0].'</td>';
+                    if ($item->[2]) {
+                        $duplicates .= '<td>'.&mt('Directory').'</td>';
+                    } else {
+                        $duplicates .= '<td>'.&mt('File').'</td>';
+                    }
+                    $duplicates .= '<td>'.$item->[3].'</td>'.
+                                   '<td>'.
+                                   &Apache::lonlocal::locallocaltime($item->[4]).
+                                   '</td>'.
+                                   &end_data_table_row();
+                    $num ++;
+                }
+            }
+        }
+    }
+    my $itemcount;
+    if (@paths > 0) {
+        $itemcount = scalar(@paths);
+    } else {
+        $itemcount = 1;
+    }
+    if ($is_camtasia) {
+        $output .= $lt{'auto'}.'<br />'.
+                   '<span class="LC_nobreak">'.$lt{'proa'}.'<label>'.
+                   '<input type="radio" name="autoextract_camtasia" value="1" onclick="javascript:camtasiaToggle();" checked="checked" />'.
+                   $lt{'yes'}.'</label>&nbsp;<label>'.
+                   '<input type="radio" name="autoextract_camtasia" value="0" onclick="javascript:camtasiaToggle();" />'.
+                   $lt{'no'}.'</label></span><br />'.
+                   '<div id="camtasia_titles" style="display:block">'.
+                   &Apache::lonhtmlcommon::start_pick_box().
+                   &Apache::lonhtmlcommon::row_title($lt{'fold'}).
+                   '<input type="textbox" name="camtasia_foldername" value="'.$env{'form.comment'}.'" />'."\n".
+                   &Apache::lonhtmlcommon::row_closure().
+                   &Apache::lonhtmlcommon::row_title($lt{'movi'}).
+                   '<input type="textbox" name="camtasia_moviename" value="" />'."\n".
+                   &Apache::lonhtmlcommon::row_closure(1).
+                   &Apache::lonhtmlcommon::end_pick_box().
+                   '</div>';
+    }
+    $output .= 
+        '<input type="hidden" name="archive_overwrite_total" value="'.$num.'" />'.
+        '<input type="hidden" name="archive_itemcount" value="'.$itemcount.'" />'.
+        "\n";
+    if ($duplicates ne '') {
+        $output .= '<p><span class="LC_warning">'.
+                   &mt('Warning: decompression of the archive will overwrite the following items which already exist:').'</span><br />'.  
+                   &start_data_table().
+                   &start_data_table_header_row().
+                   '<th>'.&mt('Overwrite?').'</th>'.
+                   '<th>'.&mt('Name').'</th>'.
+                   '<th>'.&mt('Type').'</th>'.
+                   '<th>'.&mt('Size').'</th>'.
+                   '<th>'.&mt('Last modified').'</th>'.
+                   &end_data_table_header_row().
+                   $duplicates.
+                   &end_data_table().
+                   '</p>';
+    }
+    $output .= '<input type="hidden" name="archiveurl" value="'.$archiveurl.'" />'."\n";
     if (ref($hiddenelements) eq 'HASH') {
         foreach my $hidden (sort(keys(%{$hiddenelements}))) {
             $output .= '<input type="hidden" name="'.$hidden.'" value="'.$hiddenelements->{$hidden}.'" />'."\n";
         }
     }
     $output .= <<"END";
-<span class="LC_nobreak">$lt{'perm'}&nbsp;
-<label><input type="radio" name="archivedelete" value="0" checked="checked" />$lt{'no'}</label>&nbsp;&nbsp;
-<label><input type="radio" name="archivedelete" value="1" />$lt{'yes'}</label></span><br />
+<br />
 <input type="submit" name="decompress" value="$lt{'extr'}" />
 </form>
 $noextract
-</div>
 END
     return $output;
 }
 
+sub decompression_utility {
+    my ($program) = @_;
+    my @utilities = ('tar','gunzip','bunzip2','unzip'); 
+    my $location;
+    if (grep(/^\Q$program\E$/,@utilities)) { 
+        foreach my $dir ('/bin/','/usr/bin/','/usr/local/bin/','/sbin/',
+                         '/usr/sbin/') {
+            if (-x $dir.$program) {
+                $location = $dir.$program;
+                last;
+            }
+        }
+    }
+    return $location;
+}
+
+sub list_archive_contents {
+    my ($file,$pathsref) = @_;
+    my (@cmd,$output);
+    my $needsregexp;
+    if ($file =~ /\.zip$/) {
+        @cmd = (&decompression_utility('unzip'),"-l");
+        $needsregexp = 1;
+    } elsif (($file =~ m/\.tar\.gz$/) ||
+             ($file =~ /\.tgz$/)) {
+        @cmd = (&decompression_utility('tar'),"-ztf");
+    } elsif ($file =~ /\.tar\.bz2$/) {
+        @cmd = (&decompression_utility('tar'),"-jtf");
+    } elsif ($file =~ m|\.tar$|) {
+        @cmd = (&decompression_utility('tar'),"-tf");
+    }
+    if (@cmd) {
+        undef($!);
+        undef($@);
+        if (open(my $fh,"-|", @cmd, $file)) {
+            while (my $line = <$fh>) {
+                $output .= $line;
+                chomp($line);
+                my $item;
+                if ($needsregexp) {
+                    ($item) = ($line =~ /^\s*\d+\s+[\d\-]+\s+[\d:]+\s*(.+)$/); 
+                } else {
+                    $item = $line;
+                }
+                if ($item ne '') {
+                    unless (grep(/^\Q$item\E$/,@{$pathsref})) {
+                        push(@{$pathsref},$item);
+                    } 
+                }
+            }
+            close($fh);
+        }
+    }
+    return $output;
+}
+
 sub decompress_uploaded_file {
     my ($file,$dir) = @_;
     &Apache::lonnet::appenv({'cgi.file' => $file});
@@ -9915,8 +10732,6 @@ sub process_decompression {
         } else {
             my @ids=&Apache::lonnet::current_machine_ids();
             my $currdir = "$dir_root/$destination";
-            my ($currdirlistref,$currlisterror) =
-                &Apache::lonnet::dirlist($currdir,$docudom,$docuname,1);
             if (grep(/^\Q$docuhome\E$/,@ids)) {
                 $dir = &LONCAPA::propath($docudom,$docuname).
                        "$dir_root/$destination";
@@ -9927,47 +10742,61 @@ sub process_decompression {
                     $error = &mt('Archive file not found.');
                 }
             }
-            if ($dir eq '') {
+            my (@to_overwrite,@to_skip);
+            if ($env{'form.archive_overwrite_total'} > 0) {
+                my $total = $env{'form.archive_overwrite_total'};
+                for (my $i=0; $i<$total; $i++) {
+                    if ($env{'form.archive_overwrite_'.$i} == 1) {
+                        push(@to_overwrite,$env{'form.archive_overwrite_name_'.$i});
+                    } elsif ($env{'form.archive_overwrite_'.$i} == 0) {
+                        push(@to_skip,$env{'form.archive_overwrite_name_'.$i});
+                    }
+                }
+            }
+            my $numskip = scalar(@to_skip);
+            if (($numskip > 0) && 
+                ($numskip == $env{'form.archive_itemcount'})) {
+                $warning = &mt('All items in the archive file already exist, and no overwriting of existing files has been requested.');         
+            } elsif ($dir eq '') {
                 $error = &mt('Directory containing archive file unavailable.');
             } elsif (!$error) {
-                my ($decompressed,$display) = &decompress_uploaded_file($file,$dir);
+                my ($decompressed,$display);
+                if ($numskip > 0) {
+                    my $tempdir = time.'_'.$$.int(rand(10000));
+                    mkdir("$dir/$tempdir",0755);
+                    system("mv $dir/$file $dir/$tempdir/$file");
+                    ($decompressed,$display) = 
+                        &decompress_uploaded_file($file,"$dir/$tempdir");
+                    foreach my $item (@to_skip) {
+                        if (($item ne '') && ($item !~ /\.\./)) {
+                            if (-f "$dir/$tempdir/$item") { 
+                                unlink("$dir/$tempdir/$item");
+                            } elsif (-d "$dir/$tempdir/$item") {
+                                system("rm -rf $dir/$tempdir/$item");
+                            }
+                        }
+                    }
+                    system("mv $dir/$tempdir/* $dir");
+                    rmdir("$dir/$tempdir");   
+                } else {
+                    ($decompressed,$display) = 
+                        &decompress_uploaded_file($file,$dir);
+                }
                 if ($decompressed eq 'ok') {
-                    $output = &mt('Files extracted successfully from archive.').'<br />';
+                    $output = '<p class="LC_info">'.
+                              &mt('Files extracted successfully from archive.').
+                              '</p>'."\n";
                     my ($warning,$result,@contents);
                     my ($newdirlistref,$newlisterror) =
                         &Apache::lonnet::dirlist($currdir,$docudom,
                                                  $docuname,1);
                     my (%is_dir,%changes,@newitems);
                     my $dirptr = 16384;
-                    if (ref($currdirlistref) eq 'ARRAY') {
-                        my @curritems;
-                        foreach my $dir_line (@{$currdirlistref}) {
-                            my ($item,$rest)=split(/\&/,$dir_line,2);
-                            unless ($item =~ /\.+$/) {
-                                push(@curritems,$item);
-                            }
-                        }
-                        if (ref($newdirlistref) eq 'ARRAY') {
-                            foreach my $dir_line (@{$newdirlistref}) {
-                                my ($item,undef,undef,$testdir)=split(/\&/,$dir_line,4);
-                                unless ($item =~ /^\.+$/) {
-                                    if ($dirptr&$testdir) {
-                                        $is_dir{$item} = 1;
-                                    }
-                                    push(@newitems,$item);
-                                }
-                            }
-                            my @diffs = &compare_arrays(\@curritems,\@newitems);
-                            if (@diffs > 0) {
-                               foreach my $item (@diffs) {
-                                   $changes{$item} = 1;
-                               }
-                            }
-                        }
-                    } elsif (ref($newdirlistref) eq 'ARRAY') {
+                    if (ref($newdirlistref) eq 'ARRAY') {
                         foreach my $dir_line (@{$newdirlistref}) {
                             my ($item,undef,undef,$testdir)=split(/\&/,$dir_line,5);
-                            unless ($item =~ /\.+$/) {
+                            unless (($item =~ /^\.+$/) || ($item eq $file) || 
+                                    ((@to_skip > 0) && (grep(/^\Q$item\E$/,@to_skip)))) {
                                 push(@newitems,$item);
                                 if ($dirptr&$testdir) {
                                     $is_dir{$item} = 1;
@@ -9984,8 +10813,11 @@ sub process_decompression {
                         }
                     }
                     if (@contents > 0) {
+                        my $wantform;
+                        unless ($env{'form.autoextract_camtasia'}) {
+                            $wantform = 1;
+                        }
                         my (%children,%parent,%dirorder,%titles);
-                        my $wantform = 1;
                         my ($count,$datatable) = &get_extracted($docudom,$docuname,
                                                                 $currdir,\%is_dir,
                                                                 \%children,\%parent,
@@ -9994,10 +10826,54 @@ sub process_decompression {
                         if ($datatable ne '') {
                             $output .= &archive_options_form('decompressed',$datatable,
                                                              $count,$hiddenelem);
-                            my $startcount = 4;
+                            my $startcount = 6;
                             $output .= &archive_javascript($startcount,$count,
                                                            \%titles,\%children);
                         }
+                        if ($env{'form.autoextract_camtasia'}) {
+                            my %displayed;
+                            my $total = 1;
+                            $env{'form.archive_directory'} = [];
+                            foreach my $i (sort { $a <=> $b } keys(%dirorder)) {
+                                my $path = join('/',map { $titles{$_}; } @{$dirorder{$i}});
+                                $path =~ s{/$}{};
+                                my $item;
+                                if ($path ne '') {
+                                    $item = "$path/$titles{$i}";
+                                } else {
+                                    $item = $titles{$i};
+                                }
+                                $env{'form.archive_content_'.$i} = "$dir_root/$destination/$item";
+                                if ($item eq $contents[0]) {
+                                    push(@{$env{'form.archive_directory'}},$i);
+                                    $env{'form.archive_'.$i} = 'display';
+                                    $env{'form.archive_title_'.$i} = $env{'form.camtasia_foldername'};
+                                    $displayed{'folder'} = $i;
+                                } elsif ($item eq "$contents[0]/index.html") {
+                                    $env{'form.archive_'.$i} = 'display';
+                                    $env{'form.archive_title_'.$i} = $env{'form.camtasia_moviename'};
+                                    $displayed{'web'} = $i;
+                                } else {
+                                    if ($item eq "$contents[0]/media") {
+                                        push(@{$env{'form.archive_directory'}},$i);
+                                    }
+                                    $env{'form.archive_'.$i} = 'dependency';
+                                }
+                                $total ++;
+                            }
+                            for (my $i=1; $i<$total; $i++) {
+                                next if ($i == $displayed{'web'});
+                                next if ($i == $displayed{'folder'});
+                                $env{'form.archive_dependent_on_'.$i} = $displayed{'web'};
+                            }
+                            $env{'form.phase'} = 'decompress_cleanup';
+                            $env{'form.archivedelete'} = 1;
+                            $env{'form.archive_count'} = $total-1;
+                            $output .=
+                                &process_extracted_files('coursedocs',$docudom,
+                                                         $docuname,$destination,
+                                                         $dir_root,$hiddenelem);
+                        }
                     } else {
                         $warning = &mt('No new items extracted from archive file.');
                     }
@@ -10123,6 +10999,9 @@ sub archive_row {
     my $offset = 0;
     foreach my $action ('display','dependency','discard') {
         $offset ++;
+        if ($action ne 'display') {
+            $offset ++;
+        }  
         $output .= '<td><span class="LC_nobreak">'.
                    '<label><input type="radio" name="archive_'.$count.
                    '" id="archive_'.$action.'_'.$count.'" value="'.$action.'"';
@@ -10168,27 +11047,47 @@ sub archive_row {
 }
 
 sub archive_options_form {
-    my ($form,$output,$count,$hiddenelem) = @_;
-    return '<form name="'.$form.'" method="post" action="">'."\n".
-           '<input type="hidden" name="phase" value="decompress_cleanup" />'."\n".
-                    '<p>'.
-                    &mt('How should each item be incorporated in the course?').
-                    '</p>'.
-                    '<div class="LC_columnSection"><fieldset>'.
-                    '<legend>'.&mt('Content actions for all').'</legend>'.
-                    '<input type="button" value="'.&mt('Add as folder/file').'" '.
-                    'onclick="javascript:checkAll(document.'.$form.",'display'".')" />'.
-                    '&nbsp;&nbsp;<input type="button" value="'.&mt('Include as dependency for a displayed file').'"'.
-                    ' onclick="javascript:checkAll(document.'.$form.",'dependency'".')" />'.
-                    '&nbsp;&nbsp;<input type="button" value="'.&mt('Discard').'"'.
-                    ' onclick="javascript:checkAll(document.'.$form.",'discard'".')" />'.
-                     '</fieldset></div>'.
+    my ($form,$display,$count,$hiddenelem) = @_;
+    my %lt = &Apache::lonlocal::texthash(
+               perm => 'Permanently remove archive file?',
+               hows => 'How should each extracted item be incorporated in the course?',
+               cont => 'Content actions for all',
+               addf => 'Add as folder/file',
+               incd => 'Include as dependency for a displayed file',
+               disc => 'Discard',
+               no   => 'No',
+               yes  => 'Yes',
+               save => 'Save',
+    );
+    my $output = <<"END";
+<form name="$form" method="post" action="">
+<p><span class="LC_nobreak">$lt{'perm'}&nbsp;
+<label>
+  <input type="radio" name="archivedelete" value="0" checked="checked" />$lt{'no'}
+</label>
+&nbsp;
+<label>
+  <input type="radio" name="archivedelete" value="1" />$lt{'yes'}</label>
+</span>
+</p>
+<input type="hidden" name="phase" value="decompress_cleanup" />
+<br />$lt{'hows'}
+<div class="LC_columnSection">
+  <fieldset>
+    <legend>$lt{'cont'}</legend>
+    <input type="button" value="$lt{'addf'}" onclick="javascript:checkAll(document.$form,'display');" /> 
+    &nbsp;&nbsp;<input type="button" value="$lt{'incd'}" onclick="javascript:checkAll(document.$form,'dependency');" />
+    &nbsp;&nbsp;<input type="button" value="$lt{'disc'}" onclick="javascript:checkAll(document.$form,'discard');" />
+  </fieldset>
+</div>
+END
+    return $output.
            &start_data_table()."\n".
-           $output."\n".
+           $display."\n".
            &end_data_table()."\n".
            '<input type="hidden" name="archive_count" value="'.$count.'" />'.
            $hiddenelem.
-           '<br /><input type="submit" name="archive_submit" value="'.&mt('Save').'" />'.
+           '<br /><input type="submit" name="archive_submit" value="'.$lt{'save'}.'" />'.
            '</form>';
 }
 
@@ -10282,7 +11181,10 @@ function dependencyCheck(form,count,offs
             document.getElementById('arc_depon_'+count).style.display='block'; 
             form.elements[depitem].options.length = 0;
             form.elements[depitem].options[0] = new Option('Select','',true,true);
-            for (var i=1; i<count; i++) {
+            for (var i=1; i<=numitems; i++) {
+                if (i == count) {
+                    continue;
+                }
                 var startelement = $startcount + (i-1) * 7;
                 for (var j=1; j<6; j++) {
                     if ((j != 2) && (j!= 4)) {
@@ -10309,7 +11211,7 @@ function dependencyCheck(form,count,offs
 
 function propagateSelect(form,count,offset) {
     if (count > 0) {
-        var item = (2+offset+$startcount)+7*(count-1);
+        var item = (1+offset+$startcount)+7*(count-1);
         var picked = form.elements[item].options[form.elements[item].selectedIndex].value; 
         if (Object.prototype.toString.call(parents[count]) === '[object Array]') {
             if (parents[count].length > 0) {
@@ -10323,7 +11225,7 @@ function propagateSelect(form,count,offs
 
 function containerSelect(form,count,offset,picked) {
     if (count > 0) {
-        var item = (1+offset+$startcount)+7*(count-1);
+        var item = (offset+$startcount)+7*(count-1);
         if (form.elements[item].type == 'radio') {
             if (form.elements[item].value == 'dependency') {
                 if (form.elements[item+1].type == 'select-one') {
@@ -10378,7 +11280,7 @@ sub process_extracted_files {
     return unless ($numitems);
     my @ids=&Apache::lonnet::current_machine_ids();
     my ($prefix,$pathtocheck,$dir,$ishome,$error,$warning,%toplevelitems,%is_dir,
-        %folders,%containers,%mapinner);
+        %folders,%containers,%mapinner,%prompttofetch);
     my $docuhome = &Apache::lonnet::homeserver($docuname,$docudom);
     if (grep(/^\Q$docuhome\E$/,@ids)) {
         $prefix = &LONCAPA::propath($docudom,$docuname);
@@ -10414,21 +11316,27 @@ sub process_extracted_files {
             }
         }
     }
-    my ($output,%children,%parent,%titles,%dirorder);
+    my ($output,%children,%parent,%titles,%dirorder,$result);
     if (keys(%toplevelitems) > 0) {
         my @contents = sort(keys(%toplevelitems));
         (my $count,undef) = &get_extracted($docudom,$docuname,$currdir,\%is_dir,\%children,
                                            \%parent,\@contents,\%dirorder,\%titles);
     }
-    my (%referrer,%orphaned,%todelete,%newdest,%newseqid);
+    my (%referrer,%orphaned,%todelete,%todeletedir,%newdest,%newseqid);
     if ($numitems) {
         for (my $i=1; $i<=$numitems; $i++) {
+            next if ($env{'form.archive_'.$i} eq 'dependency');
             my $path = $env{'form.archive_content_'.$i};
             if ($path =~ /^\Q$pathtocheck\E/) {
                 if ($env{'form.archive_'.$i} eq 'discard') {
                     if ($prefix ne '' && $path ne '') {
                         if (-e $prefix.$path) {
-                            $todelete{$prefix.$path} = 1;
+                            if ((@archdirs > 0) && 
+                                (grep(/^\Q$i\E$/,@archdirs))) {
+                                $todeletedir{$prefix.$path} = 1;
+                            } else {
+                                $todelete{$prefix.$path} = 1;
+                            }
                         }
                     }
                 } elsif ($env{'form.archive_'.$i} eq 'display') {
@@ -10468,8 +11376,11 @@ sub process_extracted_files {
                             my ($outtext,$errtext) =
                                 &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
                                                         $docuname.'/'.$folders{$outer}.
-                                                        '.'.$containers{$outer},1);
+                                                        '.'.$containers{$outer},1,1);
                             $newseqid{$i} = $newidx;
+                            unless ($errtext) {
+                                $result .=  '<li>'.&mt('Folder: [_1] added to course',$docstitle).'</li>'."\n";
+                            }
                         }
                     } else {
                         if ($context eq 'coursedocs') {
@@ -10486,6 +11397,11 @@ sub process_extracted_files {
                             if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx") {
                                 system("mv $prefix$path $prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title");
                                 $newdest{$i} = "$prefix$dir/$docstype/$mapinner{$outer}/$newidx";
+                                unless ($ishome) {
+                                    my $fetch = "$newdest{$i}/$title";
+                                    $fetch =~ s/^\Q$prefix$dir\E//;
+                                    $prompttofetch{$fetch} = 1;
+                                }
                             }
                             $LONCAPA::map::resources[$newidx]=
                                 $docstitle.':'.$url.':false:normal:res';
@@ -10493,69 +11409,98 @@ sub process_extracted_files {
                             my ($outtext,$errtext)=
                                 &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
                                                         $docuname.'/'.$folders{$outer}.
-                                                        '.'.$containers{$outer},1);
+                                                        '.'.$containers{$outer},1,1);
+                            unless ($errtext) {
+                                if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
+                                    $result .= '<li>'.&mt('File: [_1] added to course',$docstitle).'</li>'."\n";
+                                }
+                            }
                         }
                     }
-                } elsif ($env{'form.archive_'.$i} eq 'dependency') {
-                    my ($title) = ($path =~ m{/([^/]+)$});
-                    $referrer{$i} = $env{'form.archive_dependent_on_'.$i};
-                    if ($env{'form.archive_'.$referrer{$i}} eq 'display') {
-                        if (ref($dirorder{$i}) eq 'ARRAY') {
-                            my ($itemidx,$fullpath);
+                }
+            } else {
+                $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />'; 
+            }
+        }
+        for (my $i=1; $i<=$numitems; $i++) {
+            next unless ($env{'form.archive_'.$i} eq 'dependency');
+            my $path = $env{'form.archive_content_'.$i};
+            if ($path =~ /^\Q$pathtocheck\E/) {
+                my ($title) = ($path =~ m{/([^/]+)$});
+                $referrer{$i} = $env{'form.archive_dependent_on_'.$i};
+                if ($env{'form.archive_'.$referrer{$i}} eq 'display') {
+                    if (ref($dirorder{$i}) eq 'ARRAY') {
+                        my ($itemidx,$fullpath,$relpath);
+                        if (ref($dirorder{$referrer{$i}}) eq 'ARRAY') {
+                            my $container = $dirorder{$referrer{$i}}->[-1];
                             for (my $j=0; $j<@{$dirorder{$i}}; $j++) {
-                                if (ref($dirorder{$referrer{$i}}) eq 'ARRAY') {
-                                    my $container = $dirorder{$referrer{$i}}->[-1];
-                                    for (my $j=0; $j<@{$dirorder{$i}}; $j++) {
-                                        if ($dirorder{$i}->[$j] eq $container) {
-                                            $itemidx = $j;
-                                        }
-                                    }
+                                if ($dirorder{$i}->[$j] eq $container) {
+                                    $itemidx = $j;
                                 }
                             }
-                            if ($itemidx ne '') {
-                                if (grep(/^\Q$referrer{$i}\E$/,@archdirs)) {
-                                    if ($mapinner{$referrer{$i}}) {
-                                        $fullpath = "$prefix$dir/$docstype/$mapinner{$referrer{$i}}";
-                                        for (my $j=$itemidx; $j<@{$dirorder{$i}}; $j++) {
-                                            if (grep(/^\Q$dirorder{$i}->[$j]\E$/,@archdirs)) {
-                                                unless (defined($newseqid{$dirorder{$i}->[$j]})) {
-                                                    $fullpath .= '/'.$titles{$dirorder{$i}->[$j]};
-                                                    if (!-e $fullpath) {
-                                                        mkdir($fullpath,0755);
-                                                    }
-                                                }
-                                            } else {
-                                                last;
+                        }
+                        if ($itemidx eq '') {
+                            $itemidx =  0;
+                        } 
+                        if (grep(/^\Q$referrer{$i}\E$/,@archdirs)) {
+                            if ($mapinner{$referrer{$i}}) {
+                                $fullpath = "$prefix$dir/$docstype/$mapinner{$referrer{$i}}";
+                                for (my $j=$itemidx; $j<@{$dirorder{$i}}; $j++) {
+                                    if (grep(/^\Q$dirorder{$i}->[$j]\E$/,@archdirs)) {
+                                        unless (defined($newseqid{$dirorder{$i}->[$j]})) {
+                                            $fullpath .= '/'.$titles{$dirorder{$i}->[$j]};
+                                            $relpath .= '/'.$titles{$dirorder{$i}->[$j]};
+                                            if (!-e $fullpath) {
+                                                mkdir($fullpath,0755);
                                             }
                                         }
+                                    } else {
+                                        last;
                                     }
-                                } elsif ($newdest{$referrer{$i}}) {
-                                    $fullpath = $newdest{$referrer{$i}};
-                                    for (my $j=$itemidx; $j<@{$dirorder{$i}}; $j++) {
-                                        if ($env{'form.archive_'.$dirorder{$i}->[$j]} eq 'discard') {
-                                            $orphaned{$i} = $env{'form.archive_'.$dirorder{$i}->[$j]};
-                                            last;
-                                        } elsif (grep(/^\Q$dirorder{$i}->[$j]\E$/,@archdirs)) {
-                                            unless (defined($newseqid{$dirorder{$i}->[$j]})) {
-                                                $fullpath .= '/'.$titles{$dirorder{$i}->[$j]};
-                                                if (!-e $fullpath) {
-                                                    mkdir($fullpath,0755);
-                                                }
-                                            }
-                                        } else {
-                                            last;
+                                }
+                            }
+                        } elsif ($newdest{$referrer{$i}}) {
+                            $fullpath = $newdest{$referrer{$i}};
+                            for (my $j=$itemidx; $j<@{$dirorder{$i}}; $j++) {
+                                if ($env{'form.archive_'.$dirorder{$i}->[$j]} eq 'discard') {
+                                    $orphaned{$i} = $env{'form.archive_'.$dirorder{$i}->[$j]};
+                                    last;
+                                } elsif (grep(/^\Q$dirorder{$i}->[$j]\E$/,@archdirs)) {
+                                    unless (defined($newseqid{$dirorder{$i}->[$j]})) {
+                                        $fullpath .= '/'.$titles{$dirorder{$i}->[$j]};
+                                        $relpath .= '/'.$titles{$dirorder{$i}->[$j]};
+                                        if (!-e $fullpath) {
+                                            mkdir($fullpath,0755);
                                         }
                                     }
-                                }
-                                if ($fullpath ne '') {
-                                    system("mv $prefix$path $fullpath/$title");
+                                } else {
+                                    last;
                                 }
                             }
                         }
-                    } elsif ($env{'form.archive_'.$referrer{$i}} eq 'discard') {
-                        $warning .= &mt('[_1] is a dependency of [_2], which was discarded.',
-                                        $path,$env{'form.archive_content_'.$referrer{$i}}).'<br />';
+                        if ($fullpath ne '') {
+                            if (-e "$prefix$path") {
+                                system("mv $prefix$path $fullpath/$title");
+                            }
+                            if (-e "$fullpath/$title") {
+                                my $showpath;
+                                if ($relpath ne '') {
+                                    $showpath = "$relpath/$title";
+                                } else {
+                                    $showpath = "/$title";
+                                } 
+                                $result .= '<li>'.&mt('[_1] included as a dependency',$showpath).'</li>'."\n";
+                            } 
+                            unless ($ishome) {
+                                my $fetch = "$fullpath/$title";
+                                $fetch =~ s/^\Q$prefix$dir\E//; 
+                                $prompttofetch{$fetch} = 1;
+                            }
+                        }
                     }
+                } elsif ($env{'form.archive_'.$referrer{$i}} eq 'discard') {
+                    $warning .= &mt('[_1] is a dependency of [_2], which was discarded.',
+                                    $path,$env{'form.archive_content_'.$referrer{$i}}).'<br />';
                 }
             } else {
                 $warning .= &mt('Item extracted from archive: [_1] has unexpected path.',$path).'<br />'; 
@@ -10564,9 +11509,36 @@ sub process_extracted_files {
         if (keys(%todelete)) {
             foreach my $key (keys(%todelete)) {
                 unlink($key);
-                unless ($ishome) {
-                    #FIXME Need to notify homeserver to delete files.
-                }
+            }
+        }
+        if (keys(%todeletedir)) {
+            foreach my $key (keys(%todeletedir)) {
+                rmdir($key);
+            }
+        }
+        foreach my $dir (sort(keys(%is_dir))) {
+            if (($pathtocheck ne '') && ($dir ne ''))  {
+                &cleanup_empty_dirs($prefix."$pathtocheck/$dir");
+            }
+        }
+        if ($result ne '') {
+            $output .= '<ul>'."\n".
+                       $result."\n".
+                       '</ul>';
+        }
+        unless ($ishome) {
+            my $replicationfail;
+            foreach my $item (keys(%prompttofetch)) {
+                my $fetchresult= &Apache::lonnet::reply('fetchuserfile:'.$item,$docuhome);
+                unless ($fetchresult eq 'ok') {
+                    $replicationfail .= '<li>'.$item.'</li>'."\n";
+                }
+            }
+            if ($replicationfail) {
+                $output .= '<p class="LC_error">'.
+                           &mt('Course home server failed to retrieve:').'<ul>'.
+                           $replicationfail.
+                           '</ul></p>';
             }
         }
     } else {
@@ -10582,6 +11554,90 @@ sub process_extracted_files {
     return $output;
 }
 
+sub cleanup_empty_dirs {
+    my ($path) = @_;
+    if (($path ne '') && (-d $path)) {
+        if (opendir(my $dirh,$path)) {
+            my @dircontents = grep(!/^\./,readdir($dirh));
+            my $numitems = 0;
+            foreach my $item (@dircontents) {
+                if (-d "$path/$item") {
+                    &recurse_dirs("$path/$item");
+                    if (-e "$path/$item") {
+                        $numitems ++;
+                    }
+                } else {
+                    $numitems ++;
+                }
+            }
+            if ($numitems == 0) {
+                rmdir($path);
+            }
+            closedir($dirh);
+        }
+    }
+    return;
+}
+
+=pod
+
+=item &get_folder_hierarchy()
+
+Provides hierarchy of names of folders/sub-folders containing the current
+item,
+
+Inputs: 3
+     - $navmap - navmaps object
+
+     - $map - url for map (either the trigger itself, or map containing
+                           the resource, which is the trigger).
+
+     - $showitem - 1 => show title for map itself; 0 => do not show.
+
+Outputs: 1 @pathitems - array of folder/subfolder names.
+
+=cut
+
+sub get_folder_hierarchy {
+    my ($navmap,$map,$showitem) = @_;
+    my @pathitems;
+    if (ref($navmap)) {
+        my $mapres = $navmap->getResourceByUrl($map);
+        if (ref($mapres)) {
+            my $pcslist = $mapres->map_hierarchy();
+            if ($pcslist ne '') {
+                my @pcs = split(/,/,$pcslist);
+                foreach my $pc (@pcs) {
+                    if ($pc == 1) {
+                        push(@pathitems,&mt('Main Course Documents'));
+                    } else {
+                        my $res = $navmap->getByMapPc($pc);
+                        if (ref($res)) {
+                            my $title = $res->compTitle();
+                            $title =~ s/\W+/_/g;
+                            if ($title ne '') {
+                                push(@pathitems,$title);
+                            }
+                        }
+                    }
+                }
+            }
+            if ($showitem) {
+                if ($mapres->{ID} eq '0.0') {
+                    push(@pathitems,&mt('Main Course Documents'));
+                } else {
+                    my $maptitle = $mapres->compTitle();
+                    $maptitle =~ s/\W+/_/g;
+                    if ($maptitle ne '') {
+                        push(@pathitems,$maptitle);
+                    }
+                }
+            }
+        }
+    }
+    return @pathitems;
+}
+
 =pod
 
 =item * &get_turnedin_filepath()
@@ -12827,7 +13883,7 @@ sub init_user_environment {
             %domdef = &Apache::lonnet::get_domain_defaults($domain);
         }
 
-        foreach my $tool ('aboutme','blog','portfolio') {
+        foreach my $tool ('aboutme','blog','webdav','portfolio') {
             $userenv{'availabletools.'.$tool} = 
                 &Apache::lonnet::usertools_access($username,$domain,$tool,'reload',
                                                   undef,\%userenv,\%domdef,\%is_adv);
@@ -12840,6 +13896,20 @@ sub init_user_environment {
                                                   \%userenv,\%domdef,\%is_adv);
         }
 
+        $userenv{'canrequest.author'} =
+            &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
+                                        'reload','requestauthor',
+                                        \%userenv,\%domdef,\%is_adv);
+        my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
+                                             $domain,$username);
+        my $reqstatus = $reqauthor{'author_status'};
+        if ($reqstatus eq 'approval' || $reqstatus eq 'approved') { 
+            if (ref($reqauthor{'author'}) eq 'HASH') {
+                $userenv{'requestauthorqueued'} = $reqstatus.':'.
+                                                  $reqauthor{'author'}{'timestamp'};
+            }
+        }
+
 	$env{'user.environment'} = "$lonids/$cookie.id";
 
 	if (tie(my %disk_env,'GDBM_File',"$lonids/$cookie.id",
@@ -12888,7 +13958,9 @@ sub get_symb {
     my $symb=($env{'form.symb'} ne '' ? $env{'form.symb'} : (&Apache::lonnet::symbread($url)));
     if ($symb eq '') {
         if (!$silent) {
-            $request->print("Unable to handle ambiguous references:$url:.");
+            if (ref($request)) { 
+                $request->print("Unable to handle ambiguous references:$url:.");
+            }
             return ();
         }
     }
@@ -12952,6 +14024,224 @@ sub build_release_hashes {
     return;
 }
 
+sub update_content_constraints {
+    my ($cdom,$cnum,$chome,$cid) = @_;
+    my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
+    my ($reqdmajor,$reqdminor) = split(/\./,$curr_reqd_hash{'internal.releaserequired'});
+    my %checkresponsetypes;
+    foreach my $key (keys(%Apache::lonnet::needsrelease)) {
+        my ($item,$name,$value) = split(/:/,$key);
+        if ($item eq 'resourcetag') {
+            if ($name eq 'responsetype') {
+                $checkresponsetypes{$value} = $Apache::lonnet::needsrelease{$key}
+            }
+        }
+    }
+    my $navmap = Apache::lonnavmaps::navmap->new();
+    if (defined($navmap)) {
+        my %allresponses;
+        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() },1,0)) {
+            my %responses = $res->responseTypes();
+            foreach my $key (keys(%responses)) {
+                next unless(exists($checkresponsetypes{$key}));
+                $allresponses{$key} += $responses{$key};
+            }
+        }
+        foreach my $key (keys(%allresponses)) {
+            my ($major,$minor) = split(/\./,$checkresponsetypes{$key});
+            if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+                ($reqdmajor,$reqdminor) = ($major,$minor);
+            }
+        }
+        undef($navmap);
+    }
+    unless (($reqdmajor eq '') && ($reqdminor eq '')) {
+        &Apache::lonnet::update_released_required($reqdmajor.'.'.$reqdminor,$cdom,$cnum,$chome,$cid);
+    }
+    return;
+}
+
+sub parse_supplemental_title {
+    my ($title) = @_;
+
+    my ($foldertitle,$renametitle);
+    if ($title =~ /&amp;&amp;&amp;/) {
+        $title = &HTML::Entites::decode($title);
+    }
+    if ($title =~ m/^(\d+)___&&&___($match_username)___&&&___($match_domain)___&&&___(.*)$/) {
+        $renametitle=$4;
+        my ($time,$uname,$udom) = ($1,$2,$3);
+        $foldertitle=&Apache::lontexconvert::msgtexconverted($4);
+        my $name =  &plainname($uname,$udom);
+        $name = &HTML::Entities::encode($name,'"<>&\'');
+        $renametitle = &HTML::Entities::encode($renametitle,'"<>&\'');
+        $title='<i>'.&Apache::lonlocal::locallocaltime($time).'</i> '.
+            $name.': <br />'.$foldertitle;
+    }
+    if (wantarray) {
+        return ($title,$foldertitle,$renametitle);
+    }
+    return $title;
+}
+
+sub captcha_display {
+    my ($context,$lonhost) = @_;
+    my ($output,$error);
+    my ($captcha,$pubkey,$privkey) = &get_captcha_config($context,$lonhost);
+    if ($captcha eq 'original') {
+        $output = &create_captcha();
+        unless ($output) {
+            $error = 'captcha'; 
+        }
+    } elsif ($captcha eq 'recaptcha') {
+        $output = &create_recaptcha($pubkey);
+        unless ($output) {
+            $error = 'recaptcha'; 
+        }
+    }
+    return ($output,$error);
+}
+
+sub captcha_response {
+    my ($context,$lonhost) = @_;
+    my ($captcha_chk,$captcha_error);
+    my ($captcha,$pubkey,$privkey) = &get_captcha_config($context,$lonhost);
+    if ($captcha eq 'original') {
+        ($captcha_chk,$captcha_error) = &check_captcha();
+    } elsif ($captcha eq 'recaptcha') {
+        $captcha_chk = &check_recaptcha($privkey);
+    } else {
+        $captcha_chk = 1;
+    }
+    return ($captcha_chk,$captcha_error);
+}
+
+sub get_captcha_config {
+    my ($context,$lonhost) = @_;
+    my ($captcha,$pubkey,$privkey,$hashtocheck);
+    my $hostname = &Apache::lonnet::hostname($lonhost);
+    my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
+    my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
+    if ($context eq 'usercreation') {
+        my %domconfig = &Apache::lonnet::get_dom('configuration',[$context],$serverhomedom);
+        if (ref($domconfig{$context}) eq 'HASH') {
+            $hashtocheck = $domconfig{$context}{'cancreate'};
+            if (ref($hashtocheck) eq 'HASH') {
+                if ($hashtocheck->{'captcha'} eq 'recaptcha') {
+                    if (ref($hashtocheck->{'recaptchakeys'}) eq 'HASH') {
+                        $pubkey = $hashtocheck->{'recaptchakeys'}{'public'};
+                        $privkey = $hashtocheck->{'recaptchakeys'}{'private'};
+                    }
+                    if ($privkey && $pubkey) {
+                        $captcha = 'recaptcha';
+                    } else {
+                        $captcha = 'original';
+                    }
+                } elsif ($hashtocheck->{'captcha'} ne 'notused') {
+                    $captcha = 'original';
+                }
+            }
+        } else {
+            $captcha = 'captcha';
+        }
+    } elsif ($context eq 'login') {
+        my %domconfhash = &Apache::loncommon::get_domainconf($serverhomedom);
+        if ($domconfhash{$serverhomedom.'.login.captcha'} eq 'recaptcha') {
+            $pubkey = $domconfhash{$serverhomedom.'.login.recaptchakeys_public'};
+            $privkey = $domconfhash{$serverhomedom.'.login.recaptchakeys_private'};
+            if ($privkey && $pubkey) {
+                $captcha = 'recaptcha';
+            } else {
+                $captcha = 'original';
+            }
+        } elsif ($domconfhash{$serverhomedom.'.login.captcha'} eq 'original') {
+            $captcha = 'original';
+        }
+    }
+    return ($captcha,$pubkey,$privkey);
+}
+
+sub create_captcha {
+    my %captcha_params = &captcha_settings();
+    my ($output,$maxtries,$tries) = ('',10,0);
+    while ($tries < $maxtries) {
+        $tries ++;
+        my $captcha = Authen::Captcha->new (
+                                           output_folder => $captcha_params{'output_dir'},
+                                           data_folder   => $captcha_params{'db_dir'},
+                                          );
+        my $md5sum = $captcha->generate_code($captcha_params{'numchars'});
+
+        if (-e $Apache::lonnet::perlvar{'lonCaptchaDir'}.'/'.$md5sum.'.png') {
+            $output = '<input type="hidden" name="crypt" value="'.$md5sum.'" />'."\n".
+                      &mt('Type in the letters/numbers shown below').'&nbsp;'.
+                     '<input type="text" size="5" name="code" value="" /><br />'.
+                     '<img src="'.$captcha_params{'www_output_dir'}.'/'.$md5sum.'.png" />';
+            last;
+        }
+    }
+    return $output;
+}
+
+sub captcha_settings {
+    my %captcha_params = (
+                           output_dir     => $Apache::lonnet::perlvar{'lonCaptchaDir'},
+                           www_output_dir => "/captchaspool",
+                           db_dir         => $Apache::lonnet::perlvar{'lonCaptchaDb'},
+                           numchars       => '5',
+                         );
+    return %captcha_params;
+}
+
+sub check_captcha {
+    my ($captcha_chk,$captcha_error);
+    my $code = $env{'form.code'};
+    my $md5sum = $env{'form.crypt'};
+    my %captcha_params = &captcha_settings();
+    my $captcha = Authen::Captcha->new(
+                      output_folder => $captcha_params{'output_dir'},
+                      data_folder   => $captcha_params{'db_dir'},
+                  );
+    my $captcha_chk = $captcha->check_code($code,$md5sum);
+    my %captcha_hash = (
+                        0       => 'Code not checked (file error)',
+                       -1      => 'Failed: code expired',
+                       -2      => 'Failed: invalid code (not in database)',
+                       -3      => 'Failed: invalid code (code does not match crypt)',
+    );
+    if ($captcha_chk != 1) {
+        $captcha_error = $captcha_hash{$captcha_chk}
+    }
+    return ($captcha_chk,$captcha_error);
+}
+
+sub create_recaptcha {
+    my ($pubkey) = @_;
+    my $captcha = Captcha::reCAPTCHA->new;
+    return $captcha->get_options_setter({theme => 'white'})."\n".
+           $captcha->get_html($pubkey).
+           &mt('If either word is hard to read, [_1] will replace them.',
+               '<image src="/res/adm/pages/refresh.gif" alt="reCAPTCHA refresh" />').
+           '<br /><br />';
+}
+
+sub check_recaptcha {
+    my ($privkey) = @_;
+    my $captcha_chk;
+    my $captcha = Captcha::reCAPTCHA->new;
+    my $captcha_result =
+        $captcha->check_answer(
+                                $privkey,
+                                $ENV{'REMOTE_ADDR'},
+                                $env{'form.recaptcha_challenge_field'},
+                                $env{'form.recaptcha_response_field'},
+                              );
+    if ($captcha_result->{is_valid}) {
+        $captcha_chk = 1;
+    }
+    return $captcha_chk;
+}
+
 =pod
 
 =back