Recover from a broken external OAuth2 account

Summary: Currently, the external accounts page can die in a fire if an OAuth2 link is bad. Instead of exploding, just fail the specific link.

Test Plan: Faked an error and got "invalid token" instead of an exception.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D9937

src/applications/auth/provider/PhabricatorAuthProviderOAuth2.php

@@ -239,8 +239,17 @@ abstract class PhabricatorAuthProviderOAuth2
     PHUIObjectItemView $item,
     PhabricatorExternalAccount $account) {
 
-    // Get a valid token, possibly refreshing it.
+    // Get a valid token, possibly refreshing it. If we're unable to refresh
+    // it, render a message to that effect. The user may be able to repair the
+    // link by manually reconnecting.
+
+    $is_invalid = false;
+    try {
       $oauth_token = $this->getOAuthAccessToken($account);
+    } catch (Exception $ex) {
+      $oauth_token = null;
+      $is_invalid = true;
+    }
 
     $item->addAttribute(pht('OAuth2 Account'));
 
@@ -256,6 +265,8 @@ abstract class PhabricatorAuthProviderOAuth2
           pht(
             'Active OAuth Token'));
       }
+    } else if ($is_invalid) {
+      $item->addAttribute(pht('Invalid OAuth Access Token'));
     } else {
       $item->addAttribute(pht('No OAuth Access Token'));
     }