--- loncom/interface/lonmenu.pm	2007/10/30 23:46:02	1.230
+++ loncom/interface/lonmenu.pm	2008/05/30 20:24:25	1.236
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Routines to control the menu
 #
-# $Id: lonmenu.pm,v 1.230 2007/10/30 23:46:02 albertel Exp $
+# $Id: lonmenu.pm,v 1.236 2008/05/30 20:24:25 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -54,13 +54,27 @@ my @inlineremote;
 
 
 # ================================================================ Little texts
+sub show_course {
+    my $course = !$env{'user.adv'};
+    if (!$env{'user.adv'}) {
+	foreach my $env (keys(%env)) {
+	    next if ($env !~ m/^user\.priv\./);
+	    if ($env !~ m/^user\.priv\.(?:st|cm)/) {
+		$course = 0;
+		last;
+	    }
+	}
+    }
+    return $course;
+}
 
 sub initlittle {
     return &Apache::lonlocal::texthash('ret' => 'Return to Last Location',
 				       'nav' => 'Navigate Contents',
 				       'main' => 'Main Menu',
-                                       'roles' => ($env{'user.adv'}?
-                                                    'Roles':'Courses'),
+                                       'roles' => (&show_course()?
+                                                    'Courses':'Roles'),
+                                       'other' => 'Other Roles',
                                        'docs' => 'Edit Course',
                                        'exit' => 'Exit',
                                        'login' => 'Log In',
@@ -88,7 +102,10 @@ sub menubuttons {
     my $reloadlink='';
     my $docs='';
     my $groups='';
+    my $roles='<a href="/adm/roles" target="_top">'.$lt{'roles'}.'</a>';
+    my $role_selector;
     my $showgroups=0;
+    my ($cnum,$cdom);
     my $escurl=&escape(&Apache::lonenc::check_encrypt($env{'request.noversionuri'}));
     my $escsymb=&escape(&Apache::lonenc::check_encrypt($env{'request.symb'}));
 
@@ -104,15 +121,21 @@ sub menubuttons {
         }
     }
     if ($env{'request.course.id'}) {
+        $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
         my %coursegroups;
         my $viewgrps_permission =
 	    &Apache::lonnet::allowed('vcg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''));
         if (!$viewgrps_permission) {
-            %coursegroups = &Apache::lonnet::get_active_groups($env{'user.domain'},$env{'user.name'},$env{'course.'.$env{'request.course.id'}.'.domain'}, $env{'course.'.$env{'request.course.id'}.'.num'});
+            %coursegroups = &Apache::lonnet::get_active_groups($env{'user.domain'},$env{'user.name'},$cdom,$cnum);
 	}
         if ((keys(%coursegroups) > 0) || ($viewgrps_permission)) {
             $showgroups = 1;
         }
+        $role_selector = &roles_selector($cdom,$cnum);
+        if ($role_selector) {
+            $roles = '<span class="LC_nobreak">'.$role_selector.'&nbsp;&nbsp;<a href="/adm/roles" target="_top">'.$lt{'other'}.'</a></span>';
+        }
     }
 
     if ($env{'browser.interface'} eq 'textual') {
@@ -147,8 +170,7 @@ $utility
 </script>
 <div id="LC_top_nav">
 <a href="/adm/menu" target="_top">$lt{'main'}</a>
-$reloadlink $navmaps $docs $groups
-<a href="/adm/roles" target="_top">$lt{'roles'}</a>
+$reloadlink $navmaps $docs $groups $roles
 <a href="/adm/logout" target="_top">$lt{'exit'}</a>
 </div>
 <br />
@@ -184,6 +206,7 @@ ENDMAINMENU
 </font>
 ENDINLINEMENU
         }
+        $roles = '<td><a href="/adm/roles" target="_top">'.$lt{'roles'}.'</a></td>';
 # Do we have a NAV link?
         if ($env{'request.course.id'}) {
 	    my $link='/adm/navmaps?postdata='.$escurl.'&amp;postsymb='.
@@ -212,6 +235,9 @@ ENDGROUPS
 <td><a href="/adm/flip?postdata=$escreload" target="_top">$lt{'ret'}</a></td>
 ENDRELOAD
             }
+            if ($role_selector) {
+                $roles = '<td>'.$role_selector.'</td><td><a href="/adm/roles" target="_top">'.$lt{'other'}.'</a></td>';
+            }
         }
 	if (($env{'request.state'} eq 'construct') && ($env{'request.course.id'})) {
 	    my $escreload=&escape('return:');
@@ -247,7 +273,7 @@ $navmaps
 $docs
 $groups
 $remote
-<td><a href="/adm/roles" target="_top">$lt{'roles'}</a></td>
+$roles
 <td class="LC_top_nav_help">$helplink</td>
 <td class="LC_top_nav_exit"><a href="/adm/logout" target="_top">$lt{'exit'}</a></td>
 </tr>
@@ -336,16 +362,18 @@ sub innerregister {
 	} else {
 	    $newmail= 'swmenu.setstatus("you have","messages");';
 	}
-    } elsif (($textual) 
+    } 
+    if (($textual) 
 	     && ($env{'request.symb'}) 
 	     && ($env{'request.course.id'})) {
 	$newmail.= '<td class="LC_current_location">';
 	my ($mapurl,$rid,$resurl)=
 	    &Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
-        $newmail.=$env{'course.'.$env{'request.course.id'}.'.description'};
+        my $coursetitle=$env{'course.'.$env{'request.course.id'}.'.description'};
+        $newmail.=$coursetitle;
         my $maptitle=&Apache::lonnet::gettitle($mapurl);
 	my $restitle=&Apache::lonnet::gettitle(&Apache::lonnet::symbread());
-        if ($maptitle && $maptitle ne 'default.sequence') {
+        if ($maptitle && ($maptitle ne 'default.sequence') && ($maptitle ne $coursetitle)) {
 	    $newmail.=', '.$maptitle;
         }
         if ($restitle) {
@@ -400,19 +428,24 @@ sub innerregister {
         ###
         my $editbutton = '';
         if ($env{'user.author'}) {
-            if ($env{'request.role'}=~/^(ca|au)/) {
+            if ($env{'request.role'}=~/^(aa|ca|au)/) {
                 # Set defaults for authors
                 my ($top,$bottom) = ('con-','struct');
                 my $action = "go('/priv/".$env{'user.name'}."');";
                 my $cadom  = $env{'request.role.domain'};
                 my $caname = $env{'user.name'};
-                my $desc = "Enter my resource construction space";
+                my $desc = "Enter my construction space";
                 # Set defaults for co-authors
                 if ($env{'request.role'} =~ /^ca/) { 
                     ($cadom,$caname)=($env{'request.role'}=~/($match_domain)\/($match_username)$/);
                     ($top,$bottom) = ('co con-','struct');
                     $action = "go('/priv/".$caname."');";
                     $desc = "Enter construction space as co-author";
+                } elsif ($env{'request.role'} =~ /^aa/) {
+                    ($cadom,$caname)=($env{'request.role'}=~/($match_domain)\/($match_username)$/);
+                    ($top,$bottom) = ('co con-','struct');
+                    $action = "go('/priv/".$caname."');";
+                    $desc = "Enter construction space as assistant co-author";
                 }
                 # Check that we are on the correct machine
                 my $home = &Apache::lonnet::homeserver($caname,$cadom);
@@ -998,6 +1031,7 @@ sub rawconfig {
     my $uname=$env{'user.name'};
     my $udom=$env{'user.domain'};
     my $adv=$env{'user.adv'};
+    my $show_course=&show_course();
     my $author=$env{'user.author'};
     my $crs='';
     if ($env{'request.course.id'}) {
@@ -1037,6 +1071,16 @@ sub rawconfig {
                $output.=&secondlevel(
 	  $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
             }
+	} elsif ($pro eq 'shc') {
+            if ($show_course) {
+               $output.=&secondlevel(
+          $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
+            }
+        } elsif ($pro eq 'nsc') {
+            if (!$show_course) {
+               $output.=&secondlevel(
+	  $uname,$udom,$rol,$crs,$pub,$con,$row,$col,$prt,$img,$top,$bot,$act,$desc,$cat);
+            }
         } elsif (($pro=~/^p(\w+)/) && ($prt)) {
 	    if (&Apache::lonnet::allowed($1,$prt)) {
                $output.=&switch($uname,$udom,$row,$col,$img,$top,$bot,$act,$desc,$cat);
@@ -1061,11 +1105,12 @@ sub rawconfig {
         } elsif ($pro eq 'author') {
             if ($author) {
                 if ((($prt eq 'rca') && ($env{'request.role'}=~/^ca/)) ||
+                    (($prt eq 'raa') && ($env{'request.role'}=~/^aa/)) || 
                     (($prt eq 'rau') && ($env{'request.role'}=~/^au/))) {
                     # Check that we are on the correct machine
                     my $cadom=$requested_domain;
                     my $caname=$env{'user.name'};
-                    if ($prt eq 'rca') {
+                    if (($prt eq 'rca') || ($prt eq 'raa')) {
 		       ($cadom,$caname)=
                                ($env{'request.role'}=~/($match_domain)\/($match_username)$/);
                     }                       
@@ -1374,9 +1419,121 @@ sub hidden_button_check {
     if ($env{'request.role.adv'}) {
         return;
     }
-    return &Apache::lonnet::EXT('resource.0.buttonshide'); 
+    my $buttonshide = &Apache::lonnet::EXT('resource.0.buttonshide');
+    return $buttonshide; 
+}
+
+sub roles_selector {
+    my ($cdom,$cnum) = @_;
+    my $now = time;
+    my %courseroles;
+    my $is_cc;
+    my $role_selector;
+    if ($env{'user.role.cc./'.$cdom.'/'.$cnum}) {
+        my ($start,$end) = split(/\./,$env{'user.role.cc./'.$cdom.'/'.$cnum});
+        
+        if ((($start) && ($start<0)) || 
+            (($end) && ($end<$now))  ||
+            (($start) && ($now<$start))) {
+            $is_cc = 0;
+        } else {
+            $is_cc = 1;
+        }
+    }
+    if ($is_cc) {
+        my %adv_roles =
+             &Apache::lonnet::get_course_adv_roles($env{'request.course.id'},1);
+        foreach my $role (keys(%adv_roles),'st') {
+            my ($urole,$usec) = split(/:/,$role);
+            @{$courseroles{$urole}} = 'none';
+        }
+    } else {
+        foreach my $item (keys(%env)) {
+            if ($item =~ m-^user\.role\.([^.]+)\./\Q$cdom\E/\Q$cnum\E(/?\w*)$-) {
+                my $role = $1;
+                my $sec = $2;
+                next if ($role eq 'gr');
+                my ($start,$end) = split(/\./,$env{$item});
+                next if (($start && $start > $now) || ($end && $end < $now));
+                if ($sec eq '') {
+                    $sec = 'none';
+                }
+                if (ref($courseroles{$role}) eq 'ARRAY') {
+                    if (!grep(/^Q$sec\E$/,@{$courseroles{$role}})) {
+                        push(@{$courseroles{$role}},$sec);
+                    }
+                } else {
+                    @{$courseroles{$role}} = ($sec);
+                }
+            }
+        }
+    }
+    my @roles_order = ('cc','in','ta','ep','ad','st');
+    if (keys(%courseroles) > 1) {
+        $role_selector = &jump_to_role($cdom,$cnum);
+        $role_selector .= '<form name="rolechooser" method="post" action="/adm/roles">
+                          <select name="switchrole" onchange="javascript:adhocRole('."'switchrole'".')">';
+        $role_selector .= '<option value="">'.&mt('Switch course role to..').'</option>';
+        foreach my $role (@roles_order) {
+            if (defined($courseroles{$role})) {
+                $role_selector .= "\n".'<option value="'.$role.'">'.&Apache::lonnet::plaintext($role).'</option>'; 
+            }
+        }
+        foreach my $role (sort(keys(%courseroles))) {
+            if ($role =~ /^cr/) {
+                $role_selector .= "\n".'<option value="'.$role.'">'.&Apache::lonnet::plaintext($role).'</option>'; 
+            }
+        }
+        $role_selector .= '</select>'."\n".
+               '<input type="hidden" name="destinationurl" value="'.
+               $ENV{'REQUEST_URI'}.'" />'."\n".
+               '<input type="hidden" name="gotorole" value="1" />'."\n".
+               '<input type="hidden" name="selectrole" value="" />'."\n".
+               '<input type="hidden" name="switch" value="1" />'."\n".
+               '</form>';
+    }
+    return $role_selector;
+}
+
+sub jump_to_role {
+    my ($cdom,$cnum) = @_;
+    my $output = <<"END";
+<script type="text/javascript">
+function adhocRole(roleitem) {
+    var newrole =  document.rolechooser.elements[roleitem].options[document.rolechooser.elements[roleitem].selectedIndex].value;
+    if (newrole == '') {
+        return; 
+    } 
+    newrole += './$cdom/$cnum';
+    if (newrole == "$env{'request.role'}") {
+        return;
+    }
+    itemid = retrieveIndex('gotorole');
+    if (itemid != -1) {
+        document.rolechooser.elements[itemid].name = newrole;
+    }
+    document.rolechooser.elements[roleitem].options[document.rolechooser.elements[roleitem].selectedIndex].value = newrole;
+    document.rolechooser.selectrole.value = '1';
+    document.rolechooser.submit();
+    return;
+}
+
+function retrieveIndex(item) {
+    for (var i=0;i<document.rolechooser.elements.length;i++) {
+        if (document.rolechooser.elements[i].name == item) {
+            return i;
+        }
+    }
+    return -1;
 }
 
+
+</script>
+END
+    return $output;
+}
+
+
 # ================================================================ Main Program
 
 BEGIN {