misc: inject TEMPLATE_VARS in mail template context (#43469)

src/authentic2/utils/__init__.py

@@ -634,7 +634,9 @@ def send_templated_mail(user_or_email, template_names, context=None, with_html=T
     if not request:
         request = middleware.StoreRequestMiddleware().get_request()
 
-    ctx = context or {}
+    ctx = copy.copy(app_settings.TEMPLATE_VARS)
+    if context:
+        ctx.update(context)
 
     subject_template_names = [template_name + '_subject.txt' for template_name in template_names]
     subject_template_names += legacy_subject_templates or []

tests/templates/template_vars_body.html

@@ -0,0 +1 @@
+{{ template_vars_body_html }}

tests/templates/template_vars_body.txt

@@ -0,0 +1 @@
+{{ template_vars_body_txt }}

tests/templates/template_vars_subject.txt

@@ -0,0 +1 @@
+{{ template_vars_subject_txt }}

tests/test_utils.py

@@ -161,6 +161,21 @@ def test_send_templated_mail_template_selection(simple_user):
     assert sent_mail.body == specific_template_ou
 
 
+def test_send_templated_mail_template_vars(settings, simple_user):
+    settings.TEMPLATE_VARS = {
+        'template_vars_subject_txt': 'here is the subject',
+        'template_vars_body_txt': 'here is the text body',
+        'template_vars_body_html': 'here is the html body',
+    }
+    send_templated_mail(simple_user, ['template_vars'])
+
+    assert len(mail.outbox) == 1
+    sent_mail = mail.outbox.pop()
+    assert sent_mail.subject == 'here is the subject'
+    assert sent_mail.body == 'here is the text body\n'
+    assert sent_mail.alternatives == [('here is the html body\n', 'text/html')]
+
+
 def test_lazy_join():
     a = 'a'