(js) Export calendar subscriptions

Fixes #4560

NEWS

@@ -6,6 +6,7 @@ Enhancements
  - [web] new button to mark a task as completed (#4531)
  - [web] new button to reset Calendar categories to defaults
  - [web] moved the unseen messages count to the beginning of the window's title (#4553)
+ - [web] allow export of calendars subscriptions (#4560)
 
 Bug fixes
  - [web] include mail account name in form validation (#4532)

UI/Scheduler/product.plist

@@ -226,7 +226,7 @@
     SOGoAppointmentFolderICS = {
       methods = {
         export = {
-          protectedBy = "View";
+          protectedBy = "Access Contents Information";
           actionClass = "UIxCalFolderActions";
           actionName  = "export";
         };

UI/Templates/SchedulerUI/UIxCalMainView.wox

@@ -487,7 +487,7 @@
                ng-show="list.component.$isLoading()">
             <md-progress-circular class="md-accent"
                                   md-mode="indeterminate"
-                                  md-diameter="32"><!-- mailbox loading progress --></md-progress-circular>
+                                  md-diameter="32"><!-- components loading progress --></md-progress-circular>
           </div>
         </div>
 
@@ -572,7 +572,7 @@
             <var:string label:value="Import"/>
           </md-button>
         </md-menu-item>
-        <md-menu-item ng-hide="::($menuCtrl.calendar.isSubscription || $menuCtrl.calendar.isWebCalendar)">
+        <md-menu-item ng-hide="::$menuCtrl.calendar.isWebCalendar">
           <md-button ng-click="$menuCtrl.calendar.export()">
             <var:string label:value="Export"/>
           </md-button>

UI/WebServerResources/js/Scheduler/Calendar.service.js

@@ -554,14 +554,26 @@
    * @returns a promise of the HTTP operation
    */
   Calendar.prototype.export = function() {
-    var options;
+    var options, resource, ownerPaths, realOwnerId, path, index;
 
     options = {
       type: 'application/octet-stream',
       filename: this.name + '.ics'
     };
 
-    return Calendar.$$resource.open(this.id + '.ics', 'export', null, options);
+    if (this.isSubscription) {
+      index = this.urls.webDavICSURL.indexOf('/dav/');
+      ownerPaths = this.urls.webDavICSURL.substring(index + 5).split(/\//);
+      realOwnerId = ownerPaths[0];
+      resource = Calendar.$$resource.userResource(realOwnerId);
+      path = ownerPaths.splice(ownerPaths.length - 2).join('/');
+    }
+    else {
+      resource = Calendar.$$resource;
+      path = this.id + '.ics';
+    }
+
+    return resource.open(path, 'export', null, options);
   };
 
   /**