Merge branch 'issue-15-cannot-select-item-twice' into 'master'

Missing feature: a user/group cannot be selected twice.

Closes #15

See merge request !14

CHANGELOG

 django-ucamlookup changelog
 =============================
 
+3.0.2 - 30/04/2019
+------------------
+
+- Replaced a feature that was removed in 3.0.0: namely that if a user or group is currently
+selected in the control, it's filtered out of the dropdown results and thus can't be selected
+twice.
+
 3.0.1 - 30/04/2019
 ------------------
 

ucamlookup/templates/ucamlookup_groups.html

@@ -34,8 +34,13 @@
         processResults: function (data) {
           if (data.searchId_g != searchId_g)
             return;
+          // create the set of current selections
+          var groupids = new Set($select.select2('data').map(function(item) {return item.id}));
+          // filter out any results that are currently selected
           return {
-            results: $.map(data.groups, function(group) {
+            results: data.groups.filter(function(group) {
+              return ! groupids.has(group.groupid)
+            }).map(function(group) {
               return create_data(group.groupid, group.title)
             })
           };

ucamlookup/templates/ucamlookup_users.html

@@ -34,8 +34,13 @@
         processResults: function (data) {
           if (data.searchId_u != searchId_u)
             return;
+          // create the set of current selections
+          var crsids = new Set($select.select2('data').map(function(item) {return item.id}));
+          // filter out any results that are currently selected
           return {
-            results: $.map(data.persons, function(person) {
+            results: data.persons.filter(function(person) {
+              return ! crsids.has(person.crsid)
+            }).map(function(person) {
               return create_data(person.crsid, person.visibleName)
             })
           };