Introduce an Admin::EventScheduleController

- move SchedulesController#update action
- split it into an #create/#update and #destroy action and use these actions in the JS code

app/controllers/admin/event_schedule_controller.rb

@@ -0,0 +1,47 @@
+module Admin
+  class EventScheduleController < Admin::BaseController
+    load_and_authorize_resource :event_schedule
+
+    def create
+      event_schedule = EventSchedule.create(get_event_schedule_params(params))
+      render json: { 'status' => 'ok', event_schedule_id: event_schedule.id }
+    end
+
+    def update
+      @event_schedule.update(get_event_schedule_params(params))
+      render json: { 'status' => 'ok', event_schedule_id: @event_schedule.id }
+    end
+
+    def destroy
+      @event_schedule.destroy if @event_schedule
+      render json: { 'status' => 'ok' }
+    end
+
+    private
+
+    def get_event_schedule_params(params)
+      error_message = nil
+
+      event = Event.where(guid: params[:event]).first
+      error_message = "Could not find event GUID: #{params[:event]}" if event.nil?
+
+      schedule = Schedule.where(id: params[:schedule]).first
+      error_message = "Could not find schedule: #{params[:schedule]}" if schedule.nil?
+
+      room = Room.where(guid: params[:room]).first
+      error_message = "Could not find room GUID: #{params[:room]}" if room.nil?
+
+      error_message = 'Date and time must be present' if params[:date].eql?('') || params[:time].eql?('')
+
+      unless error_message.nil?
+        render json: { 'status' => 'error', 'message' => error_message }, status: 500
+        return
+      end
+
+      time = "#{params[:date]} #{params[:time]}"
+      Rails.logger.debug("Loading #{time}")
+      start_time = DateTime.strptime(time, '%Y-%m-%d %k:%M')
+      { schedule: schedule, event: event, room: room, start_time: start_time }
+    end
+  end
+end