Merge branch 'release-2.140.115'

[feisty_meow.git] / production / example_apps / shared_calendar / src / Controller / AuthorizerController.php

diff --git a/production/example_apps/shared_calendar/src/Controller/AuthorizerController.php b/production/example_apps/shared_calendar/src/Controller/AuthorizerController.php
new file mode 100644 (file)
index 0000000..5ae4386
--- /dev/null
+++ b/production/example_apps/shared_calendar/src/Controller/AuthorizerController.php
@@ -0,0 +1,83 @@
+<?php
+namespace App\Controller;
+
+use App\Controller\AppController;
+use Cake\Log\Log;
+use App\Traits\GoogleOauthTrait;
+
+/**
+ * Authorizer Controller
+ * 
+ * This controller provides an entry point for authorization processes.
+ * So far this is just for Google's OAuth 2.0.
+ */
+class AuthorizerController extends AppController
+{
+       use GoogleOauthTrait;
+       
+       /*
+        * Routing note:
+        * 
+        * This controller will provide a link for /authorizer/google_login where the oauth
+        * process can come back to our application from google.  To make your client secret setup
+        * simpler, add a route at the top level like so:
+        *       $routes->connect('/google_oauth', [ 'controller'=>'authorizer', 'action' => 'google_login']);
+        */
+       
+       public function initialize()
+       {
+               parent::initialize();
+       }
+       
+       /**
+        * our callback from google oauth that is passed the oauth access token (or an error
+        * if authorization failed).
+        * before redirecting to this URL, one must use the GoogleOauth trait's
+        * setPostAuthorizationURL() and setRequestedScopes() methods to provide session
+        * parameters (since this link is invoked by google later, and they will not be
+        * providing any of this info).
+        */
+       public function googleLogin() {
+               if (session_status() == PHP_SESSION_NONE) {
+                       session_start ();
+               }
+               
+               // retrieve the scopes out of the session.
+               $scopes = $this->getRequestedScopes();
+               Log::debug('loaded scopes: ' . var_export($scopes, true));
+               
+               // use the scopes in a new google client.
+               $client = $this->createGoogleClient ( $scopes );                
+               
+               // see if we already have the 'code' available from the google side.
+               if (! isset ( $_GET ['code'] )) {
+                       // no code, so we need to jump over to google.
+                       Log::Debug ( 'creating auth url to redirect to google oauth' );
+                       $auth_url = $client->createAuthUrl ();
+                       $this->redirect ( $auth_url );
+               } else {                                                
+                       // we've got our code, so now we can try to fetch our access token.
+                       Log::Debug ( 'access token being actively acquired...' );
+                       $client->fetchAccessTokenWithAuthCode ( $_GET ['code'] );
+                       // clean out the scopes in session now that we're done with them.
+                       $this->dropRequestedScopes();
+                       
+                       // record the new token in our session.
+                       $token = $client->getAccessToken ();
+                       $this->setLastOAuthToken($token);
+                       
+                       // fabulously bad idea to show this...
+                       //Log::debug ( 'got access token: ' . var_export ( $token, true ) );                    
+                                               
+                       // go to the next point in our app where we can handle the newly stored token.
+                       $redirect =  $this->getPostAuthorizationURL();
+                       if (! $redirect) {
+                               // jump home if they registered no continuation.  this is a serious error in flow.
+                               $redirect = 'http://' . $_SERVER ['HTTP_HOST'] . '/';
+                               Log::debug('failure to find the redirection location for our app after successful oauth');
+                       }
+                       $this->redirect ( $redirect );
+               }
+       }
+       
+}