allow additional config to be passed through to client

src/Client.php

@@ -26,7 +26,7 @@ public function __construct(array $config, $userEmail = '')
         $this->config = $config;
 
         // create an instance of the google client for OAuth2
-        $this->client = new Google_Client();
+        $this->client = new Google_Client(array_get($config, 'config', []));
 
         // set application name
         $this->client->setApplicationName(array_get($config, 'application_name', ''));
@@ -62,7 +62,7 @@ public function getClient()
      * Setter for the google client.
      *
      * @param string $client
-     * 
+     *
      * @return self
      */
     public function setClient(Google_Client $client)
@@ -126,7 +126,7 @@ protected function useAssertCredentials($userEmail = '')
 
         $this->client->setAuthConfig($serviceJsonUrl);
 
-        if ($userEmail) {
+        if (! empty($userEmail)) {
             $this->client->setSubject($userEmail);
         }
 

src/config/config.php

@@ -55,4 +55,18 @@
         */
         'file' => env('GOOGLE_SERVICE_ACCOUNT_JSON_LOCATION', '')
     ],
+
+    /*
+    |----------------------------------------------------------------------------
+    | Additional config for the Google Client
+    |----------------------------------------------------------------------------
+    |
+    | Set any additional config variables supported by the Google Client
+    | Details can be found here: 
+    | https://github.com/google/google-api-php-client/blob/master/src/Google/Client.php
+    | 
+    | NOTE: If client id is specified here, it will get over written by the one above.
+    |
+    */
+    'config' => [],
 ];

tests/ClientTest.php

@@ -19,6 +19,17 @@ public function testClientGetter()
         $this->assertInstanceOf('Google_Client', $client->getClient());
     }
 
+    public function testClientGetterWithAdditionalConfig()
+    {
+        $client = Mockery::mock('PulkitJalan\Google\Client', [[
+            'config' => [
+                'subject' => 'test',
+            ],
+        ]])->makePartial();
+
+        $this->assertEquals($client->getClient()->getConfig('subject'), 'test');
+    }
+
     public function testServiceMake()
     {
         $client = Mockery::mock('PulkitJalan\Google\Client', [[]])->makePartial();