feat(calendar): optionally remove attendees that can't be invited

If some attendees have prevented others to invite them, offer the
organizer to remove them when saving the invitation.

UI/Scheduler/English.lproj/Localizable.strings

@@ -499,6 +499,8 @@ validate_untilbeforeend    = "The recurrence must end after the first occurrence
 "and" = "and";
 "A time conflict exists with one or more attendees.\nWould you like to keep the current settings anyway?"
 = "A time conflict exists with one or more attendees.\nWould you like to keep the current settings anyway?";
+"Would you like to remove them and send the invitation to the remaining attendees?"
+= "Would you like to remove them and send the invitation to the remaining attendees?";
 
 /* events list */
 "Due" = "Due";

UI/Scheduler/UIxAppointmentEditor.m

@@ -263,6 +263,24 @@
   return ex;
 }
 
+- (void) _removeAttendees: (NSArray *) emails
+{
+  NSString *email;
+  iCalEvent *event;
+  iCalPerson *attendee;
+  unsigned int i;
+
+  event = [self event];
+  attendee = [[[iCalPerson alloc] init] autorelease];
+
+  for (i = 0; i < [emails count]; i++)
+    {
+      email = [emails objectAtIndex: i];
+      [attendee setEmail: email];
+      [event removeFromAttendees: attendee];
+    }
+}
+
 /**
  * @api {post} /so/:username/Calendar/:calendarId/:appointmentId/rsvpAppointment Set participation state
  * @apiVersion 1.0.0
@@ -512,6 +530,7 @@
  */
 - (id <WOActionResults>) saveAction
 {
+  NSArray *removeAttendees;
   NSDictionary *params;
   NSString *jsonResponse;
   NSException *ex;
@@ -545,12 +564,19 @@
     {
       [self setAttributes: params];
       forceSave = [[params objectForKey: @"ignoreConflicts"] boolValue];
+      removeAttendees = [params objectForKey: @"removeAttendees"];
 
       if ([event hasRecurrenceRules])
         ex = [self _adjustRecurrentRules];
 
       if (!ex)
         {
+          if (removeAttendees)
+            {
+              [co expandGroupsInEvent: event];
+              [self _removeAttendees: removeAttendees];
+            }
+
           if ([co isNew])
             {
               if (componentCalendar

UI/Templates/SchedulerUI/UIxAppointmentEditorTemplate.wox

@@ -366,12 +366,15 @@
       </md-dialog-actions>
 
       <!-- rejected attendee invitation -->
-      <md-dialog-content class="md-default-theme md-bg md-warn md-padding sg-dialog-message ng-hide" layout="row"
+      <md-dialog-content class="md-default-theme md-bg md-warn md-padding sg-dialog-message ng-hide" layout="column"
                          ng-show="editor.attendeeConflictError.reject">
-        <div class="md-flex">{{editor.attendeeConflictError.reject}}</div>
-        <md-button class="md-icon-button" ng-click="editor.edit(eventForm)">
-          <md-icon label:aria-label="Close">close</md-icon>
-        </md-button>
+        <div layout="row" layout-align="space-between start" layout-fill="layout-fill">
+          <div ng-bind-html="editor.attendeeConflictError.reject | txt2html"><!-- error --></div>
+          <md-button class="md-icon-button" ng-click="editor.edit(eventForm)">
+            <md-icon label:aria-label="Close">close</md-icon>
+          </md-button>
+        </div>
+        <div class="sg-padded--top"><var:string label:value="Would you like to remove them and send the invitation to the remaining attendees?"/></div>
       </md-dialog-content>
       <md-dialog-actions ng-show="editor.attendeeConflictError.reject">
         <md-button type="button" ng-click="editor.cancel(eventForm)">
@@ -381,6 +384,11 @@
                    ng-click="editor.edit(eventForm)">
           <var:string label:value="Edit"/>
         </md-button>
+        <md-button class="md-warn" type="button"
+                   ng-click="editor.save(eventForm, { removeAttendees: editor.attendeeConflictError.unavailableAttendees })"
+                   ng-disabled="editor.eventForm.$invalid">
+          <var:string label:value="Save"/>
+        </md-button>
       </md-dialog-actions>
     </form>
   </md-dialog>