Adds disabled flag to user and checks it if iChain is enabled

app/controllers/application_controller.rb

@@ -54,6 +54,14 @@ class ApplicationController < ActionController::Base
     redirect_to root_path
   end
 
+  rescue_from UserDisabled do
+    Rails.logger.debug('User is disabled!')
+    sign_out(current_user)
+    mail = User.admin.first ? User.admin.first.email : 'the admin!'
+    flash[:error] = "This User is disabled. Please contact #{mail}!"
+    redirect_to root_path
+  end
+
   def not_found
     raise ActionController::RoutingError.new('Not Found')
   end

app/models/user.rb

@@ -1,6 +1,9 @@
 class IChainRecordNotFound < StandardError
 end
 
+class UserDisabled < StandardError
+end
+
 class User < ActiveRecord::Base
   rolify
   include Gravtastic
@@ -42,6 +45,8 @@ class User < ActiveRecord::Base
   has_many :subscriptions, dependent: :destroy
   accepts_nested_attributes_for :roles
 
+  scope :admin, -> { where(is_admin: true) }
+
   validates :email, presence: true
 
   validates :username,
@@ -59,6 +64,9 @@ class User < ActiveRecord::Base
 
   def self.for_ichain_username(username, attributes)
     user = find_by(username: username)
+
+    raise UserDisabled if user && user.is_disabled
+
     if user
       user.update_attributes(email: attributes[:email])
     else

db/migrate/20141106141750_add_is_disabled_flag_to_user.rb

@@ -0,0 +1,5 @@
+class AddIsDisabledFlagToUser < ActiveRecord::Migration
+  def change
+    add_column :users, :is_disabled, :boolean, default: false
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20141104131625) do
+ActiveRecord::Schema.define(version: 20141106141750) do
 
   create_table "ahoy_events", force: true do |t|
     t.uuid     "visit_id"
@@ -505,6 +505,7 @@ ActiveRecord::Schema.define(version: 20141104131625) do
     t.text     "volunteer_experience"
     t.boolean  "is_admin",               default: false
     t.string   "username"
+    t.boolean  "is_disabled",            default: false
   end
 
   add_index "users", ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true