Adding token-authenticatable to user

app/controllers/habits_controller.rb

@@ -6,7 +6,7 @@ class HabitsController < ApplicationController
     @user = current_user
     respond_to do |format|
       format.html # index.html.erb
-      format.json { render json: @user }
+      format.json { render json: { habits: @user.habits, user: @user } }
     end
   end
   

app/controllers/tokens_controller.rb

@@ -0,0 +1,48 @@
+class TokensController < ApplicationController
+    skip_before_filter :verify_authenticity_token
+    respond_to :json
+    def create
+      email = params[:email]
+      password = params[:password]
+      if request.format != :json
+        render :status=>406, :json=>{:message=>"The request must be json"}
+        return
+       end
+
+    if email.nil? or password.nil?
+       render :status=>400,
+              :json=>{:message=>"The request must contain the user email and password."}
+       return
+    end
+
+    @user=User.find_by_email(email.downcase)
+
+    if @user.nil?
+      logger.info("User #{email} failed signin, user cannot be found.")
+      render :status=>401, :json=>{:message=>"Invalid email or passoword."}
+      return
+    end
+
+    # http://rdoc.info/github/plataformatec/devise/master/Devise/Models/TokenAuthenticatable
+    @user.ensure_authentication_token!
+
+    if not @user.valid_password?(password)
+      logger.info("User #{email} failed signin, password \"#{password}\" is invalid")
+      render :status=>401, :json=>{:message=>"Invalid email or passoword."}
+    else
+      render :status=>200, :json=>{:token=>@user.authentication_token}
+    end
+  end
+
+  def destroy
+    @user=User.find_by_authentication_token(params[:id])
+    if @user.nil?
+      logger.info("Token not found.")
+      render :status=>404, :json=>{:message=>"Invalid token."}
+    else
+      @user.reset_authentication_token!
+      render :status=>200, :json=>{:token=>params[:id]}
+    end
+  end
+
+end

app/models/user.rb

@@ -2,7 +2,8 @@ class User < ActiveRecord::Base
   # Include default devise modules. Others available are:
   # :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable,
-         :recoverable, :rememberable, :trackable, :validatable
+         :recoverable, :rememberable, :trackable, :validatable,
+         :token_authenticatable
 
   # Setup accessible (or protected) attributes for your model
   attr_accessible :email, :password, :password_confirmation, :remember_me, :lvl, :exp, :money

config/routes.rb

@@ -9,6 +9,7 @@ HabitTracker::Application.routes.draw do
   end
 
   devise_for :users
+  resources :tokens,:only => [:create, :destroy]
 
   # The priority is based upon order of creation:
   # first created -> highest priority.

db/migrate/20120214033038_add_token_authentication.rb

@@ -0,0 +1,9 @@
+class AddTokenAuthentication < ActiveRecord::Migration
+  def up
+    add_column :users, :authentication_token, :string
+  end
+
+  def down
+    remove_column :users, :authentication_token
+  end
+end