Add Google support to new registration flow

Summary: Ref T1536. Adds Google support.

Test Plan: Registered and logged in with Google.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1536

Differential Revision: https://secure.phabricator.com/D6167

src/__phutil_library_map__.php

@@ -821,6 +821,7 @@ phutil_register_library_map(array(
     'PhabricatorAuthProviderOAuthDisqus' => 'applications/auth/provider/PhabricatorAuthProviderOAuthDisqus.php',
     'PhabricatorAuthProviderOAuthFacebook' => 'applications/auth/provider/PhabricatorAuthProviderOAuthFacebook.php',
     'PhabricatorAuthProviderOAuthGitHub' => 'applications/auth/provider/PhabricatorAuthProviderOAuthGitHub.php',
+    'PhabricatorAuthProviderOAuthGoogle' => 'applications/auth/provider/PhabricatorAuthProviderOAuthGoogle.php',
     'PhabricatorAuthProviderPassword' => 'applications/auth/provider/PhabricatorAuthProviderPassword.php',
     'PhabricatorAuthRegisterController' => 'applications/auth/controller/PhabricatorAuthRegisterController.php',
     'PhabricatorAuthStartController' => 'applications/auth/controller/PhabricatorAuthStartController.php',
@@ -2683,6 +2684,7 @@ phutil_register_library_map(array(
     'PhabricatorAuthProviderOAuthDisqus' => 'PhabricatorAuthProviderOAuth',
     'PhabricatorAuthProviderOAuthFacebook' => 'PhabricatorAuthProviderOAuth',
     'PhabricatorAuthProviderOAuthGitHub' => 'PhabricatorAuthProviderOAuth',
+    'PhabricatorAuthProviderOAuthGoogle' => 'PhabricatorAuthProviderOAuth',
     'PhabricatorAuthProviderPassword' => 'PhabricatorAuthProvider',
     'PhabricatorAuthRegisterController' => 'PhabricatorAuthController',
     'PhabricatorAuthStartController' => 'PhabricatorAuthController',

src/applications/auth/provider/PhabricatorAuthProviderOAuthGoogle.php

@@ -0,0 +1,47 @@
+<?php
+
+final class PhabricatorAuthProviderOAuthGoogle
+  extends PhabricatorAuthProviderOAuth {
+
+  public function getProviderName() {
+    return pht('Google');
+  }
+
+  protected function newOAuthAdapter() {
+    return new PhutilAuthAdapterOAuthGoogle();
+  }
+
+  public function isEnabled() {
+    return parent::isEnabled() &&
+           PhabricatorEnv::getEnvConfig('google.auth-enabled');
+  }
+
+  protected function getOAuthClientID() {
+    return PhabricatorEnv::getEnvConfig('google.application-id');
+  }
+
+  protected function getOAuthClientSecret() {
+    $secret = PhabricatorEnv::getEnvConfig('google.application-secret');
+    if ($secret) {
+      return new PhutilOpaqueEnvelope($secret);
+    }
+    return null;
+  }
+
+  public function shouldAllowLogin() {
+    return true;
+  }
+
+  public function shouldAllowRegistration() {
+    return PhabricatorEnv::getEnvConfig('google.registration-enabled');
+  }
+
+  public function shouldAllowAccountLink() {
+    return true;
+  }
+
+  public function shouldAllowAccountUnlink() {
+    return !PhabricatorEnv::getEnvConfig('google.auth-permanent');
+  }
+
+}