expose user's api key as api_token field on sessions

app/controllers/sessions_controller.rb

@@ -1,4 +1,7 @@
 class SessionsController < ApplicationController
+  respond_to :html, :json
+  skip_forgery_protection only: :create, if: -> { request.format.json? }
+
   def new
     @user = User.new
   end
@@ -8,9 +11,18 @@ class SessionsController < ApplicationController
 
     if session_creator.authenticate
       url = params[:url] if params[:url] && params[:url].start_with?("/")
-      redirect_to(url || posts_path, :notice => "You are now logged in")
+      url = posts_path if url.nil?
+      respond_with(session_creator.user, location: url, methods: [:api_token])
     else
-      redirect_to(new_session_path, :notice => "Password was incorrect")
+      respond_with("password was incorrect", location: new_session_path) do |fmt|
+        fmt.json do
+          render json: { error: true, message: "password was incorrect"}.to_json, status: 401
+        end
+
+        fmt.html do
+          flash[:notice] = "Password was incorrect"
+        end
+      end
     end
   end
 

app/logical/session_creator.rb

@@ -1,5 +1,6 @@
 class SessionCreator
   attr_reader :session, :cookies, :name, :password, :ip_addr, :remember, :secure
+  attr_reader :user
 
   def initialize(session, cookies, name, password, ip_addr, remember = false, secure = false)
     @session = session
@@ -13,23 +14,23 @@ class SessionCreator
 
   def authenticate
     if User.authenticate(name, password)
-      user = User.find_by_name(name)
+      @user = User.find_by_name(name)
 
       if remember.present?
         cookies.permanent.signed[:user_name] = {
-          :value => user.name,
+          :value => @user.name,
           :secure => secure,
           :httponly => true
         }
         cookies.permanent[:password_hash] = {
-          :value => user.bcrypt_cookie_password_hash,
+          :value => @user.bcrypt_cookie_password_hash,
           :secure => secure,
           :httponly => true
         }
       end
 
-      session[:user_id] = user.id
+      session[:user_id] = @user.id
-      user.update_column(:last_ip_addr, ip_addr)
+      @user.update_column(:last_ip_addr, ip_addr)
       return true
     else
       return false

app/models/user.rb

@@ -612,6 +612,10 @@ class User < ApplicationRecord
         "created_at" => created_at.strftime("%Y-%m-%d %H:%M")
       }.to_json
     end
+
+    def api_token
+      api_key.try(:key)
+    end
   end
 
   module CountMethods