--- loncom/interface/lonpickcourse.pm	2016/11/02 22:41:18	1.122
+++ loncom/interface/lonpickcourse.pm	2017/01/05 16:17:11	1.125
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Pick a course
 #
-# $Id: lonpickcourse.pm,v 1.122 2016/11/02 22:41:18 raeburn Exp $
+# $Id: lonpickcourse.pm,v 1.125 2017/01/05 16:17:11 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -37,13 +37,32 @@ use Apache::lonnet;
 use Apache::lonlocal;
 use Apache::longroup;
 use LONCAPA qw(:DEFAULT :match);
+use JSON::DWIW;
 
 sub handler {
     my $r = shift;
+    if ($env{'form.context'} eq 'adhoc') {
+        &Apache::loncommon::content_type($r,'application/json');
+        $r->send_http_header;
+        my ($possroles,$description) = &Apache::lonnet::get_my_adhocroles($env{'form.cid'},1);
+        if ((ref($possroles) eq 'ARRAY') && (ref($description) eq 'HASH')) {
+            my $response = [];
+            if (@{$possroles}) {
+                foreach my $role (@{$possroles}) {
+                    push(@{$response},
+                                      { name => $role,
+                                        desc => $description->{$role},
+                                      });
+                }
+            }
+            $r->print(JSON::DWIW->to_json({roles => $response}));
+        }
+        return OK;
+    }
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
     return OK if $r->header_only;
-
+    
 # ------------------------------------------------------------ Print the screen
 
     # Get parameters from query string
@@ -53,7 +72,8 @@ sub handler {
                                'multiple','type','setroles','fixeddom','cloner',
                                'crscode','crsdom']);
     my ($type,$title,$jscript,$multelement,$multiple,$roleelement,$typeelement,
-        $lastaction,$autosubmit,$submitopener,$cloneruname,$clonerudom,$crscode,$crsdom);
+        $lastaction,$autosubmit,$submitopener,$cloneruname,$clonerudom,$crscode,
+        $crsdom,$rolechooser);
 
     # Get course type - Course, Community or Placement.
     $type = $env{'form.type'};
@@ -75,6 +95,25 @@ sub handler {
         $roleelement = '<input type="hidden" name="roleelement" value="'.$env{'form.roleelement'}.'" />';
         $submitopener = &processpick();
         $autosubmit = 'process_pick("'.$roledom.'","'.$rolename.'")';
+        if ($rolename eq 'dh') {
+            my %lt = &Apache::lonlocal::texthash(
+                     title    => 'Ad hoc role selection',
+                     preamble => 'Please choose an ad hoc role in the course.',
+                     cancel   => 'Click "OK" to enter the course, or "Cancel" to choose a different course.',
+            );
+
+            $rolechooser = <<"END";
+<div id="LC_adhocrole_chooser" title="$lt{'title'}">
+  <p>$lt{'preamble'}</p>
+  <form name="LChelpdeskadhoc" id="LChelpdeskpicker" action="">
+    <div id="LC_choose_adhoc">
+    </div>
+    <input type="submit" tabindex="-1" style="position:absolute; top:-1000px" />
+  </form>
+  <p>$lt{'cancel'}</p>
+</div>
+END
+        }
     }
     if ($env{'form.typeelement'} ne '') {
         $typeelement = '<input type="hidden" name="typeelement" value="'.$env{'form.typeelement'}.'" />';
@@ -149,7 +188,8 @@ sub handler {
     # print javascript functions for choosing a course 
     if ((($env{'form.gosearch'}) && ($env{'form.updater'} eq '')) || 
         $onlyown) {
-        $r->print(&gochoose_javascript($type,$multiple,$autosubmit,$lastaction));
+        $r->print(&gochoose_javascript($type,$multiple,$autosubmit,$lastaction,
+                                       $rolename,$rolechooser));
     }
     $r->print(&Apache::lonhtmlcommon::scripttag($jscript));
     $r->print($submitopener);
@@ -400,7 +440,7 @@ sub display_matched_courses {
         $action = '/adm/portfolio';
     }
     my $numcourses = keys(%courses);
-    $r->print('<form name="courselist" method="post" action="'.$action.'">');
+    $r->print('<form name="courselist" method="post" action="'.$action.'" id="LCcoursepicker">');
     if ($env{'form.form'} eq 'modifycourse') {
         if ($numcourses > 0) {
             my $ccrole = 'cc';
@@ -429,39 +469,36 @@ sub display_matched_courses {
                     $r->print(&mt('Enter the course with the role of [_1].',$cctitle));
                 }
             } elsif (&Apache::lonnet::allowed('rar',$crsdom)) {
-                my %adhocroles = &Apache::lonnet::userenvironment($env{'user.domain'},$env{'user.name'},
-                                                                  'adhocroles.'.$crsdom);
-                if ($adhocroles{'adhocroles.'.$crsdom} ne '') {
-                    $possrole = 1;
-                    $r->print($roleradio);
-                    my @adhoc = split(/,/,$adhocroles{'adhocroles.'.$crsdom});
-                    if (@adhoc > 1) {
-                        my %adhochash;
-                        map { $adhochash{$_} = $_; } @adhoc; 
-                        my $selector = &Apache::loncommon::select_form($adhoc[0],'adhocrole',\%adhochash);
+                my ($roles_by_num,$description,$accessref,$accessinfo) = &Apache::lonnet::get_all_adhocroles($crsdom);
+                if ((ref($roles_by_num) eq 'ARRAY') && (ref($description) eq 'HASH')) {
+                    if (@{$roles_by_num} > 1) {
+                        $r->print($roleradio);
                         if ($type eq 'Community') {
-                            $r->print(&mt('Enter the community with one of the available ad hoc roles: [_1].',
-                                          $selector)); 
+                            $r->print(&mt('Enter the community with one of the available ad hoc roles.'));
                         } elsif ($type eq 'Placement') {
-                            $r->print(&mt('Enter the placement test with one of the available ad hoc roles: [_1].',
-                                          $selector));
+                            $r->print(&mt('Enter the placement test with one of the available ad hoc roles.'));
                         } else {
-                            $r->print(&mt('Enter the course with one of the available ad hoc roles: [_1].',
-                                          $selector));
+                            $r->print(&mt('Enter the course with one of the available ad hoc roles.'));
                         }
-                    } else {
+                        $possrole = 1;
+                    } elsif (@{$roles_by_num} == 1) {
+                        $r->print($roleradio);
+                        my $rolename = $description->{$roles_by_num->[0]};
                         if ($type eq 'Community') {
-                            $r->print(&mt('Enter the community with the ad hoc role of: [_1]',$adhoc[0]));
+                            $r->print(&mt('Enter the community with the ad hoc role of: [_1]',$rolename));
                         } elsif ($type eq 'Placement') {
-                            $r->print(&mt('Enter the placement test with the ad hoc role of: [_1]',$adhoc[0]));
+                            $r->print(&mt('Enter the placement test with the ad hoc role of: [_1]',$rolename));
                         } else {
-                            $r->print(&mt('Enter the course with the ad hoc role of: [_1]',$adhoc[0]));
+                            $r->print(&mt('Enter the course with the ad hoc role of: [_1]',$rolename));
                         }
-                        $r->print('<input type="hidden" name="adhocrole" value="'.$adhoc[0].'" />');
+                        $possrole = 1;
+                    }
+                    if ($possrole) {
+                        $r->print('<input type="hidden" name="adhocrole" value="" />');
                     }
                 }
             }
-            if ($possrole) { 
+            if ($possrole) {
                 $r->print('</label></span><br />');
             }
             $r->print('<span class="LC_nobreak"><label>'
@@ -726,7 +763,7 @@ sub display_matched_courses {
         $r->print('<input type="hidden" name="setroles" value="'.$env{'form.setroles'}.'" />');
         $r->print('<input type="hidden" name="action" value="rolepicker" />');
     } elsif ($env{'form.form'} eq 'modifycourse') {
-        $r->print(&Apache::lonhtmlcommon::echo_form_input(['phase','pickedcourse','type','form','numtitles','state']));
+        $r->print(&Apache::lonhtmlcommon::echo_form_input(['phase','pickedcourse','type','form','numtitles','state','adhocrole']));
     } else {
         $r->print('<input type="hidden" name="cnumelement" value="'.
                   $env{'form.cnumelement'}.'" />'."\n".  
@@ -803,7 +840,7 @@ sub course_chooser {
 }
 
 sub gochoose_javascript {
-    my ($type,$multiple,$autosubmit,$lastaction) = @_;
+    my ($type,$multiple,$autosubmit,$lastaction,$rolename,$rolechooser) = @_;
     my %elements = (
                      'Course' => {
                                  name  => 'coursepick',
@@ -821,9 +858,26 @@ sub gochoose_javascript {
                                  list  => 'courselist',
                                  },
                     );
-    my $output = qq|
+
+    my %lt = &Apache::lonlocal::texthash (
+        none => 'You are not eligible to use an ad hoc role for the selected course',
+        ok => 'OK',
+        exit => 'Cancel',       
+    );
+    &js_escape(\%lt);
+
+    my $output;
+    if ($rolechooser) {
+        $output .= qq|
+\$(document).ready(function(){
+    \$( "#LC_adhocrole_chooser" ).dialog({ autoOpen: false });
+});
+|;
+    }
+    $output .= qq|
 function gochoose(cname,cdom,cdesc) {
     var openerForm = "$env{'form.form'}";
+    var openerRole = "$rolename";
     courseCount = 0;
     var courses = '';
 |;
@@ -899,16 +953,80 @@ ENDNAMECODE
         }
 |;
     }
-    $output .= qq|
+    $output .= <<ENDJS;
     if (openerForm == 'portform') {
         document.courselist.cnum.value = cname;
         document.courselist.cdom.value = cdom;
     }
-    $autosubmit
-    $lastaction
+    if ((openerForm == 'rolechoice') && (openerRole == 'dh')) {
+\$("#LC_choose_adhoc").empty();
+var http = new XMLHttpRequest();
+var url = "/adm/pickcourse";
+var params = "cid="+cdom+"_"+cname+"&context=adhoc";
+http.open("POST", url, true);
+http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
+http.onreadystatechange = function() {
+    if(http.readyState == 4 && http.status == 200) {
+        var data = \$.parseJSON(http.responseText);
+        var len = data.roles.length;
+        if (len == '' || len == null || len == 0) {
+            alert('$lt{none}');  
+        } else {
+            if (len == 1) {
+                process_pick(cdom,data.roles[0].name);
+                $lastaction;
+            } else {
+                var str = '';
+                for (var i=0; i<data.roles.length; i++) { 
+                    \$("<label><input type='radio' value='"+data.roles[i].name+"' name='LC_get_role' id='LC_get_role_"+i+"' />"+data.roles[i].desc+"</label><span>&nbsp;&nbsp;</span>")
+                    .appendTo("#LC_choose_adhoc");
+                }
+                \$( "#LC_get_role_0").prop("checked", true);
+                \$( "#LC_adhocrole_chooser" ).dialog({ autoOpen: false });
+                \$( "#LC_adhocrole_chooser" ).dialog("open");
+                \$( "#LC_adhocrole_chooser" ).dialog({
+                 height: 400,
+                 width: 500,
+                 modal: true,
+                 resizable: false,
+                 buttons: [
+                       {
+                         text: "$lt{'ok'}",
+                         click: function() {
+                                     var rolename = \$('input[name=LC_get_role]:checked', '#LChelpdeskpicker').val();
+                                     process_pick(cdom,rolename);
+                                     \$("#LC_adhocrole_chooser").dialog( "close" );
+                                     $lastaction;
+                                } 
+                       },
+                       {
+                         text: "$lt{'exit'}",
+                         click: function() {
+                                     \$("#LC_adhocrole_chooser").dialog( "close" );
+                                }
+                       }
+                     ],
+                });
+                \$( "#LC_adhocrole_chooser" ).find( "form" ).on( "submit", function( event ) {
+                   event.preventDefault();
+                   var rolename = \$('input[name=LC_get_role]:checked', '#LChelpdeskpicker').val()
+                   process_pick(cdom,rolename);
+                   \$("#LC_adhocrole_chooser").dialog( "close" );
+                   $lastaction;
+                   });
+            }
+        }
+    }
 }
-|;
-    return &Apache::lonhtmlcommon::scripttag($output);
+http.send(params);
+    } else {
+        $autosubmit
+        $lastaction
+    }
+}
+
+ENDJS
+    return $rolechooser.&Apache::lonhtmlcommon::scripttag($output);
 }
 
 1;
@@ -1038,9 +1156,9 @@ Side Effects: None
 
 =item *
 X<gochoose_javascript()>
-B<gochoose_javascript($type,$multiple,$autosubmit,$lastaction)>:
+B<gochoose_javascript($type,$multiple,$autosubmit,$lastaction,$rolename)>:
 
-Input: 4 - course type; single (0) or multiple courses (1); in context of DC selecting a CC role in a course: javascript code from &processpick(); final action to take after user chooses course(s):  either close window, or submit form for display of next page etc.
+Input: 5 - course type; single (0) or multiple courses (1); in context of DC selecting a CC role in a course: javascript code from &processpick(); final action to take after user chooses course(s):  either close window, or submit form for display of next page etc.; rolename (e.g., dh) of user's current role.
 
 Output: 1  $output - javascript wrapped in E<lt>scriptE<gt>E<lt>/scriptE<gt> tags