Add omniauth strategie for zeuswpi

app/controllers/callbacks_controller.rb

@@ -0,0 +1,10 @@
+class CallbacksController < Devise::OmniauthCallbacksController
+  def zeuswpi
+    @user = User.from_omniauth(request.env["omniauth.auth"])
+    sign_in_and_redirect @user
+  end
+
+  def after_omniauth_failure_path_for(scope)
+    root_path
+  end
+end

app/models/user.rb

@@ -20,4 +20,10 @@ class User < ActiveRecord::Base
   def transactions
     Transaction.where("creditor_id = ? OR debtor_id = ?", id, id)
   end
+
+  def self.from_omniauth(auth)
+    where(name: auth.uid).first_or_create do |user|
+      user.name = auth.uid
+    end
+  end
 end

config/initializers/devise.rb

@@ -235,7 +235,7 @@ Devise.setup do |config|
   # ==> OmniAuth
   # Add a new OmniAuth provider. Check the wiki for more information on setting
   # up on your models and hooks.
-  # config.omniauth :github, 'APP_ID', 'APP_SECRET', scope: 'user,public_repo'
+  config.omniauth :zeuswpi, Rails.application.secrets.omniauth_client_id, Rails.application.secrets.omniauth_client_secret
 
   # ==> Warden configuration
   # If you want to use other strategies, that are not supported by Devise, or

config/initializers/zeuswpi.rb

@@ -0,0 +1,38 @@
+require 'omniauth-oauth2'
+
+module OmniAuth
+  module Strategies
+    class Zeuswpi < OmniAuth::Strategies::OAuth2
+
+      option :provider_ignores_state, true
+
+      # Give your strategy a name.
+      option :name, 'zeuswpi'
+
+      # This is where you pass the options you would pass when
+      # initializing your consumer from the OAuth gem.
+      option :client_options, {
+        site:          'https://kelder.zeus.ugent.be',
+        authorize_url: '/oauth/oauth2/authorize/',
+        token_url:     '/oauth/oauth2/token/',
+      }
+
+      # These are called after authentication has succeeded. If
+      # possible, you should try to set the UID without making
+      # additional calls (if the user id is returned with the token
+      # or as a URI parameter). This may not be possible with all
+      # providers.
+      uid{ raw_info['username'] }
+
+      extra do
+        {
+          'raw_info' => raw_info
+        }
+      end
+
+      def raw_info
+        @raw_info ||= access_token.get('/oauth/api/current_user/').parsed
+      end
+    end
+  end
+end

config/routes.rb

@@ -1,5 +1,8 @@
 Rails.application.routes.draw do
-  devise_for :users
+  devise_for :users, controllers: {
+    omniauth_callbacks: 'callbacks'
+  }
+
   # The priority is based upon order of creation: first created -> highest priority.
   # See how all your routes lay out with "rake routes".
 

config/secrets.yml

@@ -12,6 +12,8 @@
 
 development:
   secret_key_base: f196861eed46b817be7402ec85f917fa19c7a2f7a4f17e1ee4c9e8f657eea809be7a56951bd0af1f339237d1bcef739f4f5206ba06d68bcbe24866a8cb1e6b5f
+  omniauth_client_id: tomtest
+  omniauth_client_secret: blargh
 
 test:
   secret_key_base: 74b63cafd732dfbdddede69122e2735485c9b30392b068d6260495fafd3c2cd71209fc396acdd3f06ab27f63b605fd31f9e76a5e4d5d3426878cb27dccba4db1
@@ -20,3 +22,5 @@ test:
 # instead read values from the environment.
 production:
   secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
+  omniauth_client_id: ""
+  omniauth_client_secret: ""