Allow Mandrill specific options to be set globally in the settings file.

This is useful to set options such as tracking_domain etc per instance when using subaccounts with Mandrill.

djrill/mail/backends/djrill.py

@@ -63,6 +63,12 @@ class DjrillBackend(BaseEmailBackend):
         self.api_key = getattr(settings, "MANDRILL_API_KEY", None)
         self.api_url = MANDRILL_API_URL
         self.session = None
+        self.global_settings = {}
+        for setting_key in getattr(settings, "MANDRILL_SETTINGS", {}):
+            if not isinstance(settings.MANDRILL_SETTINGS, dict):
+                raise ImproperlyConfigured("MANDRILL_SETTINGS must be a dict "
+                                           "in the settings.py file.")
+            self.global_settings[setting_key] = settings.MANDRILL_SETTINGS[setting_key]
 
         self.subaccount = getattr(settings, "MANDRILL_SUBACCOUNT", None)
 
@@ -233,6 +239,8 @@ class DjrillBackend(BaseEmailBackend):
             'async', 'ip_pool'
         ]
         for attr in mandrill_attrs:
+            if attr in self.global_settings:
+                api_params[attr] = self.global_settings[attr]
             if hasattr(message, attr):
                 api_params[attr] = getattr(message, attr)
 
@@ -270,11 +278,16 @@ class DjrillBackend(BaseEmailBackend):
             msg_dict['subaccount'] = self.subaccount
 
         for attr in mandrill_attrs:
+            if attr in self.global_settings:
+                msg_dict[attr] = self.global_settings[attr]
             if hasattr(message, attr):
                 msg_dict[attr] = getattr(message, attr)
 
         # Allow simple python dicts in place of Mandrill
         # [{name:name, value:value},...] arrays...
+        if 'global_merge_vars' in self.global_settings:
+            msg_dict['global_merge_vars'] = self._expand_merge_vars(
+                self.global_settings['global_merge_vars'])
         if hasattr(message, 'global_merge_vars'):
             msg_dict['global_merge_vars'] = \
                 self._expand_merge_vars(message.global_merge_vars)

djrill/tests/test_mandrill_send.py

@@ -540,6 +540,123 @@ class DjrillMandrillFeatureTests(DjrillBackendMockAPITestCase):
             self.message.send()
 
 
+@override_settings(MANDRILL_SETTINGS={
+    'from_name': 'Djrill Test',
+    'important': True,
+    'track_opens': True,
+    'track_clicks': True,
+    'auto_text': True,
+    'auto_html': True,
+    'inline_css': True,
+    'url_strip_qs': True,
+    'tags': ['djrill'],
+    'preserve_recipients': True,
+    'view_content_link': True,
+    'tracking_domain': 'example.com',
+    'signing_domain': 'example.com',
+    'return_path_domain': 'example.com',
+    'google_analytics_domains': ['example.com/test'],
+    'google_analytics_campaign': ['UA-00000000-1'],
+    'metadata': ['djrill'],
+    'merge_language': 'mailchimp',
+    'global_merge_vars': {'TEST': 'djrill'},
+    'async': False,
+    'ip_pool': 'Pool1',
+    'invalid': 'invalid',
+})
+class DjrillMandrillGlobalFeatureTests(DjrillBackendMockAPITestCase):
+    """Test Djrill backend support for global ovveride Mandrill-specific features"""
+
+    def setUp(self):
+        super(DjrillMandrillGlobalFeatureTests, self).setUp()
+        self.message = mail.EmailMessage('Subject', 'Text Body',
+                                         'from@example.com', ['to@example.com'])
+
+    def test_global_options(self):
+        """Test that any global settings get passed through
+        """
+        self.message.send()
+        self.assert_mandrill_called("/messages/send.json")
+        data = self.get_api_call_data()
+        self.assertEqual(data['message']['from_name'], 'Djrill Test')
+        self.assertTrue(data['message']['important'], True)
+        self.assertTrue(data['message']['track_opens'], True)
+        self.assertTrue(data['message']['track_clicks'], True)
+        self.assertTrue(data['message']['auto_text'], True)
+        self.assertTrue(data['message']['auto_html'], True)
+        self.assertTrue(data['message']['inline_css'], True)
+        self.assertTrue(data['message']['url_strip_qs'], True)
+        self.assertEqual(data['message']['tags'], ['djrill'])
+        self.assertTrue(data['message']['preserve_recipients'], True)
+        self.assertTrue(data['message']['view_content_link'], True)
+        self.assertEqual(data['message']['tracking_domain'], 'example.com')
+        self.assertEqual(data['message']['signing_domain'], 'example.com')
+        self.assertEqual(data['message']['return_path_domain'], 'example.com')
+        self.assertEqual(data['message']['google_analytics_domains'], ['example.com/test'])
+        self.assertEqual(data['message']['google_analytics_campaign'], ['UA-00000000-1'])
+        self.assertEqual(data['message']['metadata'], ['djrill'])
+        self.assertEqual(data['message']['merge_language'], 'mailchimp')
+        self.assertEqual(data['message']['global_merge_vars'],
+                         [{'name': 'TEST', 'content': 'djrill'}])
+        self.assertFalse('merge_vars' in data['message'])
+        self.assertFalse('recipient_metadata' in data['message'])
+        # Options at top level of api params (not in message dict):
+        self.assertFalse('send_at' in data)
+        self.assertEqual(data['async'], False)
+        self.assertEqual(data['ip_pool'], 'Pool1')
+        # Option that shouldn't be added
+        self.assertFalse('invalid' in data['message'])
+
+    def test_global_options_override(self):
+        """Test that manually settings options overrides global settings
+        """
+        self.message.important = True
+        self.message.auto_text = True
+        self.message.auto_html = True
+        self.message.inline_css = True
+        self.message.preserve_recipients = True
+        self.message.view_content_link = False
+        self.message.tracking_domain = "click.example.com"
+        self.message.signing_domain = "example.com"
+        self.message.return_path_domain = "support.example.com"
+        self.message.subaccount = "marketing-dept"
+        self.message.async = True
+        self.message.ip_pool = "Bulk Pool"
+        self.message.send()
+        data = self.get_api_call_data()
+        self.assertEqual(data['message']['important'], True)
+        self.assertEqual(data['message']['auto_text'], True)
+        self.assertEqual(data['message']['auto_html'], True)
+        self.assertEqual(data['message']['inline_css'], True)
+        self.assertEqual(data['message']['preserve_recipients'], True)
+        self.assertEqual(data['message']['view_content_link'], False)
+        self.assertEqual(data['message']['tracking_domain'], "click.example.com")
+        self.assertEqual(data['message']['signing_domain'], "example.com")
+        self.assertEqual(data['message']['return_path_domain'], "support.example.com")
+        self.assertEqual(data['message']['subaccount'], "marketing-dept")
+        self.assertEqual(data['async'], True)
+        self.assertEqual(data['ip_pool'], "Bulk Pool")
+
+    def test_global_options_override_tracking(self):
+        """Test that manually settings options overrides global settings
+        """
+        self.message.track_opens = False
+        self.message.track_clicks = False
+        self.message.url_strip_qs = False
+        self.message.send()
+        data = self.get_api_call_data()
+        self.assertEqual(data['message']['track_opens'], False)
+        self.assertEqual(data['message']['track_clicks'], False)
+        self.assertEqual(data['message']['url_strip_qs'], False)
+
+    def test_global_merge(self):
+        self.message.global_merge_vars = {'GREETING': "Hello"}
+        self.message.send()
+        data = self.get_api_call_data()
+        self.assertEqual(data['message']['global_merge_vars'],
+                         [{'name': "GREETING", 'content': "Hello"}])
+
+
 @override_settings(EMAIL_BACKEND="djrill.mail.backends.djrill.DjrillBackend")
 class DjrillImproperlyConfiguredTests(TestCase):
     """Test Djrill backend without Djrill-specific settings in place"""

docs/usage/sending_mail.rst

@@ -103,11 +103,21 @@ Some notes and limitations:
 Mandrill-Specific Options
 -------------------------
 
+.. setting:: MANDRILL_SETTINGS
+
 Most of the options from the Mandrill
 `messages/send API <https://mandrillapp.com/api/docs/messages.html#method=send>`_
 `message` struct can be set directly on an :class:`~django.core.mail.EmailMessage`
 (or subclass) object:
 
+Most of these options can be globally set in your project's :file:`settings.py`
+using :setting:`MANDRILL_SETTINGS`. For Example::
+
+    MANDRILL_SETTINGS = {
+        'tracking_domain': 'example.com',
+        'track_opens': True,
+    }
+
 .. These attributes are in the same order as they appear in the Mandrill API docs...
 
 .. attribute:: important