User foundation setup

app/controllers/users/application_controller.rb

@@ -0,0 +1,52 @@
+module Users
+  class ApplicationController < ::ApplicationController
+    before_action :user_authentication, :unless => ->(c){ %w(obtain_token).include?(c.action_name) || c.request.format.symbol == :html } # , except: [:obtain_token, :index]
+    private
+
+    def user_authentication
+      if params[:auth_token].present?
+        user = User.find_by_authentication_token(params[:auth_token])
+        sign_in user if user
+        sign_out current_user if current_user && !user # Other token attempt of logged in user
+      else
+        authenticate_user!
+      end
+
+      unless current_user.present?
+        respond_to do |format|
+          format.html {redirect_to new_user_session_path}
+          format.json {render json: json_response(ok: false, status: 401), status: :unauthorized}
+        end
+      end
+    end
+
+    def obtain_token
+      redirect_to user_omniauth_authorize_path('facebook') and return unless current_user.present?
+      respond_to do |format|
+        format.html
+        format.json do
+          render json: json_response(ok: false, status: 401) and return unless params[:user].present? && params[:user][:email].present? && params[:user][:password].present?
+          user = User.find_by_email(params[:user][:email])
+          render json: json_response(ok: false, status: 401) and return unless user
+          render json: json_response(ok: false, status: 401) and return unless user.valid_password?(params[:user][:password])
+          user.ensure_authentication_token
+          sign_in user
+          render json: json_response(ok: true, auth_token: user.authentication_token, user_id: user.id)
+        end
+
+      end
+    end
+
+    def handle_message_params
+      flash.now[:notice] = t('messages.the_list_has_been_closed', list: List.model_name.human) if params[:list_closed].present?
+      flash.now[:notice] = t("messages.#{params[:message]}", list: List.model_name.human, supplier: Supplier.model_name.human) if params[:message].present? && params[:message] =~ /^\w+$/
+    end
+
+    # General handler of json responses. Will be able to set some additional communication data.
+    # By default a response is ok.
+    def json_response(obj = {})
+      obj[:ok] = true unless obj.has_key?(:ok)
+      obj
+    end
+  end
+end