Implement role authorization

app/controllers/admin/users_controller.rb

@@ -1,6 +1,7 @@
 module Admin
   class UsersController < ApplicationController
-    before_filter :verify_admin
+    load_and_authorize_resource
+
     def new
       @user = User.new
     end
@@ -10,34 +11,37 @@ module Admin
     end
 
     def show
-      @user = User.find(params[:id])
-
       # Variable @show_attributes holds the attributes that are visible for the 'show' action
       # If you want to change the attributes that are shown in the 'show' action of users
       # add/remove the attributes in the following string array
-      @show_attributes = %w(name email affiliation biography registered attended created_at
+      @show_attributes = %w(name email affiliation biography registered attended roles created_at
                             updated_at sign_in_count current_sign_in_at last_sign_in_at
                             current_sign_in_ip last_sign_in_ip)
     end
 
     def update
-      user = User.find(params[:id])
-      user.update_attributes!(params[:user])
-      redirect_to admin_users_path, notice: "Updated #{user.email}"
+      params[:user].delete :roles_attributes if params[:user]
+      @user.update_attributes!(params[:user])
+      redirect_to admin_users_path, notice: "Updated #{@user.email}"
+    end
+
+    def add_role
+      role = params[:user][:roles_attributes][:"0"]
+      @user.add_role role['name'].parameterize.underscore.to_sym, Conference.find(role['resource_id'])
+
+      respond_to do |format|
+        format.html
+        format.js
+      end
+
     end
 
     def edit
-      @user = User.find(params[:id])
-    end
-
-    def delete
-      @user = User.find(params[:id])
     end
 
     def destroy
-      @user = User.find(params[:id])
       @user.destroy
-      redirect_to admin_users_path, notice: 'User got deleted'
+      redirect_to admin_users_path, notice: "User #{@user.name} (#{@user.email})got deleted"
     end
   end
 end