Introduces new RegistrationPeriod Object for Conference

#416

app/controllers/admin/registration_periods_controller.rb

@@ -0,0 +1,57 @@
+module Admin
+  class RegistrationPeriodsController < ApplicationController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource through: :conference, singleton: true
+
+    def new
+      @registration_period = @conference.build_registration_period
+    end
+
+    def create
+      @registration_period = @conference.build_registration_period(registration_period)
+      send_mail_on_reg_update = @conference.notify_on_registration_dates_changed?
+
+      if @registration_period.save
+        Mailbot.delay.conference_registration_date_update_mail(@conference) if send_mail_on_reg_update
+        redirect_to admin_conference_registration_period_path(@conference.short_title),
+                    notice: 'Registration Period successfully updated.'
+      else
+        flash[:alert] = "A error prohibited the Registration Period from being saved: #{@registration_period.errors.full_messages.join('. ')}."
+        render :new
+      end
+    end
+
+    def edit
+    end
+
+    def show
+    end
+
+    def update
+      @registration_period.assign_attributes(registration_period)
+      send_mail_on_reg_update = @conference.notify_on_registration_dates_changed?
+
+      if @registration_period.update(registration_period)
+        Mailbot.delay.conference_registration_date_update_mail(@conference) if send_mail_on_reg_update
+        redirect_to admin_conference_registration_period_path(@conference.short_title),
+                    notice: 'Registration Period successfully updated.'
+      else
+        flash[:alert] = "A error prohibited the Registration Period from being saved: " \
+        "#{@registration_period.errors.full_messages.join('. ')}."
+        render :edit
+      end
+    end
+
+    def destroy
+      @registration_period.destroy
+      redirect_to admin_conference_registration_period_path,
+                  notice: 'Registration Period was successfully destroyed.'
+    end
+
+    private
+
+    def registration_period
+      params[:registration_period]
+    end
+  end
+end