Add Route and Controller for ICS download

Provide a route and method for people to download an ICS file

app/Http/Controllers/EventViewController.php

@@ -124,4 +124,16 @@ class EventViewController extends Controller
             'message' => 'Message Successfully Sent',
         ]);
     }
+
+    public function showCalendarIcs(Request $request, $event_id)
+    {
+        $event = Event::findOrFail($event_id);
+
+        $icsContent = $event->getIcsForEvent();
+
+        return response()->make($icsContent, 200, [
+            'Content-Type' => 'application/octet-stream',
+            'Content-Disposition' => 'attachment; filename="event.ics'
+        ]);
+    }
 }

app/Http/routes.php

@@ -116,6 +116,11 @@ Route::group(['prefix' => 'e'], function () {
         'uses' => 'EventViewEmbeddedController@showEmbeddedEvent',
     ]);
 
+    Route::get('/{event_id}/calendar.ics', [
+        'as'   => 'downloadCalendarIcs',
+        'uses' => 'EventViewController@showCalendarIcs',
+    ]);
+
     Route::get('/{event_id}/{event_slug?}', [
         'as'   => 'showEventPage',
         'uses' => 'EventViewController@showEventHome',