--- loncom/interface/lonpickcourse.pm	2016/11/02 22:41:18	1.122
+++ loncom/interface/lonpickcourse.pm	2017/01/02 19:44:06	1.123
@@ -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 1.123 2017/01/02 19:44:06 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'});
+        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);
@@ -803,7 +843,7 @@ 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 +861,24 @@ 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|
+\$( "#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 +954,210 @@ 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);
+}
+
+sub get_my_adhocroles {
+    my (@okroles,%description);
+    if ($env{'form.cid'} =~ /^($match_domain)_($match_courseid)$/) {
+        my $cdom = $1;
+        my $cnum = $2;
+        if ($env{"user.role.dh./$cdom/"}) {
+            my $then=$env{'user.login.time'};
+            my $update=$env{'user.update.time'};
+            my $liverole = 1;
+            my ($tstart,$tend)=split(/\./,$env{'user.role.dh./'.$cdom});
+            my $limit = $update;
+            if ($env{'request.role'} eq 'dh./'.$cdom.'/') {
+                $limit = $then;
+            }
+            if ($tstart && $tstart>$limit) { $liverole = 0; }
+            if ($tend   && $tend  <$limit) { $liverole = 0; }
+            if ($liverole) {
+                if (&Apache::lonnet::homeserver($cnum,$cdom) ne 'no_host') {
+                    my %domdefaults = &Apache::lonnet::get_domain_defaults($cdom);
+                    if (ref($domdefaults{'adhocroles'}) eq 'HASH') {
+                        my $count = 0;
+                        my %domcurrent = %{$domdefaults{'adhocroles'}};
+                        my (%ordered,%access_in_dom);
+                        foreach my $role (sort(keys(%{$domdefaults{'adhocroles'}}))) {
+                            my ($order,$desc,$access_in_dom);
+                            if (ref($domcurrent{$role}) eq 'HASH') {
+                                $order = $domcurrent{$role}{'order'};
+                                $desc = $domcurrent{$role}{'desc'};
+                                $access_in_dom{$role} = $domcurrent{$role}{'access'};
+                            }
+                            if ($order eq '') {
+                                $order = $count;
+                            }
+                            $ordered{$order} = $role;
+                            if ($desc ne '') {
+                                $description{$role} = $desc;
+                            } else {
+                                $description{$role}= $role;
+                            }
+                            $count++;
+                        }
+                        my @roles_by_num = ();
+                        foreach my $item (sort {$a <=> $b } (keys(%ordered))) {
+                            push(@roles_by_num,$ordered{$item});
+                        }
+                        if (@roles_by_num) {
+                            my %settings = &Apache::lonnet::dump('environment',$cdom,$cnum,'internal\.adhoc');
+                            my %setincrs;
+                            if ($settings{'internal.adhocaccess'}) {
+                                map { $setincrs{$_} = 1; } split(/,/,$settings{'internal.adhocaccess'});
+                            }
+                            my @statuses;
+                            if ($env{'environment.inststatus'}) {
+                                @statuses = split(/,/,$env{'environment.inststatus'});
+                            }
+                            my $user = $env{'user.name'}.':'.$env{'user.domain'};
+                            foreach my $role (@roles_by_num) {
+                                my ($curraccess,@okstatus,@personnel);
+                                if ($setincrs{$role}) {
+                                    ($curraccess,my $rest) = split(/=/,$settings{'internal.adhoc.'.$role});
+                                    if ($curraccess eq 'none') {
+                                        next;
+                                    } elsif ($curraccess eq 'all') {
+                                        push(@okroles,$role);
+                                    } elsif ($curraccess eq 'status') {
+                                        @okstatus = split(/\&/,$rest);
+                                    } elsif (($curraccess eq 'exc') || ($curraccess eq 'inc')) {
+                                        @personnel = split(/\&/,$rest);
+                                    }
+                                } else {
+                                    $curraccess = $access_in_dom{$role};
+                                    if ($curraccess eq 'status') {
+                                        if (ref($domcurrent{$role}{$curraccess}) eq 'ARRAY') {
+                                            @okstatus = @{$domcurrent{$role}{$curraccess}};
+                                        }
+                                    } elsif (($curraccess eq 'exc') || ($curraccess eq 'inc')) {
+                                        if (ref($domcurrent{$role}{$curraccess}) eq 'ARRAY') {
+                                            @personnel = @{$domcurrent{$role}{$curraccess}};
+                                        }
+                                    }
+                                }
+                                if ($curraccess eq 'none') {
+                                    next;
+                                } elsif ($curraccess eq 'all') {
+                                    push(@okroles,$role);
+                                } elsif ($curraccess eq 'status') {
+                                    if (@okstatus) {
+                                        if (!@statuses) {
+                                            if (grep(/^default$/,@okstatus)) {
+                                                push(@okroles,$role);
+                                            }
+                                        } else {
+                                            foreach my $status (@okstatus) {
+                                                if (grep(/^\Q$status\E$/,@statuses)) {
+                                                    push(@okroles,$role);
+                                                    last;
+                                                }
+                                            }
+                                        }
+                                    }
+                                } elsif (($curraccess eq 'exc') || ($curraccess eq 'inc')) {
+                                    if (grep(/^\Q$user\E$/,@personnel)) {
+                                        if ($curraccess eq 'exc') {
+                                            push(@okroles,$role);
+                                        }
+                                    } elsif ($curraccess eq 'inc') {
+                                        push(@okroles,$role);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    my $response = [];
+    if (@okroles) {
+        foreach my $role (@okroles) {
+            push(@{$response},
+                              { name => $role,
+                                desc => $description{$role},
+                              });
+        }
+    }
+    my $json = JSON::DWIW->to_json({roles => $response});
+    return $json;
 }
 
 1;
@@ -1038,9 +1287,9 @@ 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