Introduces new audience object

#416

app/controllers/admin/audiences_controller.rb

@@ -0,0 +1,46 @@
+module Admin
+  class AudiencesController < ApplicationController
+    before_action :set_conference, only: [:edit, :update]
+    before_action :set_audience, only: [:edit, :update]
+
+    def edit
+    end
+
+    def update
+      @audience.assign_attributes(audience_params)
+
+      notify_on_conf_reg_dates_updates = (@audience.registration_start_date_changed? || @audience.registration_end_date_changed?)\
+                                         && @conference.email_settings.send_on_updated_conference_registration_dates\
+                                         && !@conference.email_settings.updated_conference_registration_dates_subject.blank?\
+                                         && @conference.email_settings.updated_conference_registration_dates_template
+
+      if @audience.update(audience_params)
+        Mailbot.delay.conference_registration_date_update_mail(@conference) if notify_on_conf_reg_dates_updates
+        redirect_to edit_admin_conference_audience_path(@conference.short_title),
+                    notice: 'Audience was successfully updated.'
+      else
+        render :edit
+      end
+    end
+
+    private
+
+    def set_conference
+      @conference = Conference.find_by(short_title: params[:conference_id])
+    end
+
+    # Use callbacks to share common setup or constraints between actions.
+    def set_audience
+      @audience = @conference.audience
+    end
+
+    # Only allow a trusted parameter "white list" through.
+    def audience_params
+      # params.require(:audience).permit(:conference_id,
+      #                                  :registration_start_date,
+      #                                  :registration_end_date,
+      #                                  :registration_description)
+      params[:audience]
+    end
+  end
+end