Big refactoring of registration

- Added datatable gem
- Addaed datatable to events, users (#422), registrations

app/controllers/conference_registrations_controller.rb

@@ -0,0 +1,85 @@
+class ConferenceRegistrationsController < ApplicationController
+  before_filter :verify_user
+  load_resource :conference, find_by: :short_title
+  authorize_resource :conference_registrations, class: Registration
+  before_action :set_registration, only: [:edit, :update, :destroy]
+  before_action :set_workshops, only: [:new, :edit, :update, :create]
+
+  def new
+    @registration = current_user.registrations.build(conference_id: @conference.id)
+    @registration.build_supporter_registration
+  end
+
+  def edit
+  end
+
+  def create
+    user_attributes = registration_params[:user_attributes]
+    params[:registration].delete :user_attributes
+
+    @registration = current_user.registrations.build(registration_params)
+    @registration.conference_id = @conference.id
+
+    if @registration.save && current_user.update_attributes(user_attributes)
+      # Trigger ahoy event
+      ahoy.track 'Registered', title: 'New registration'
+
+      # Send registration mail
+      if @conference.email_settings.send_on_registration?
+        Mailbot.delay.registration_mail(@conference, current_user)
+      end
+
+      # Set subscription for the conference
+      Subscription.create(conference_id: @conference.id, user_id: current_user.id)
+
+      redirect_to edit_conference_conference_registrations_path(@conference.short_title),
+                  notice: 'You are now registered and will be receiving E-Mail notifications.'
+    else
+      flash[:alert] = "A error prohibited the registration for #{@conference.title}: "\
+                        "#{@registration.errors.full_messages.join('. ')}."
+      render :new
+    end
+  end
+
+  def update
+    if @registration.update(registration_params)
+      redirect_to edit_conference_conference_registrations_path(@conference.short_title),
+                  notice: 'Registration was successfully updated.'
+    else
+      flash[:alert] = "A error prohibited the registration for #{@conference.title}: "\
+                        "#{@registration.errors.full_messages.join('. ')}."
+      render :edit
+    end
+  end
+
+  def destroy
+    @registration.destroy
+    redirect_to root_path,
+                notice: "You are not registered for #{@conference.title} anymore!"
+  end
+
+  protected
+
+  def set_workshops
+    @workshops = @conference.events.where('require_registration = ? AND state LIKE ?', true, 'confirmed')
+  end
+
+  def set_registration
+    @registration = current_user.registrations.where(conference_id: @conference.id).first
+  end
+
+  def registration_params
+    params.require(:registration).
+        permit(
+          :conference_id, :arrival, :departure,
+          :volunteer,
+          vchoice_ids: [], qanswer_ids: [],
+          qanswers_attributes: [],
+          event_ids: [],
+          user_attributes: [
+              :id, :name, :tshirt, :mobile, :volunteer_experience, :languages],
+          supporter_registration_attributes: [
+            :id, :supporter_level_id, :code
+          ])
+  end
+end