Add a new community realm to our test databases.

The realm with string_id of "simple" just has three users
named alice, bob, and cindy for now.  It is useful for testing
scenarios where realms don't have special zulip.com exception
handling.

templates/zerver/login.html

@@ -143,10 +143,16 @@ autofocus('#id_username');
                     {% for user_email in direct_admins %}
                     <p><input type="submit" name="direct_email" class="btn-direct btn-admin" value="{{ user_email }}" /></p>
                     {% endfor %}
+
                     <p>({{ _('Normal users') }})</p>
                     {% for user_email in direct_users %}
                     <p><input type="submit" name="direct_email" class="btn-direct btn-user" value="{{ user_email }}" /></p>
                     {% endfor %}
+
+                    <p>({{ _('Community users') }})</p>
+                    {% for user_email in community_users %}
+                    <p><input type="submit" name="direct_email" class="btn-direct btn-user" value="{{ user_email }}" /></p>
+                    {% endfor %}
                 </div>
             </div>
         </form>

zerver/tests/test_signup.py

@@ -895,9 +895,10 @@ class UserSignUpTest(ZulipTestCase):
         realm.invite_required = False
         realm.save()
 
-        realm = get_realm('mit')
-        do_deactivate_realm(realm)
-        realm.save()
+        for string_id in ('simple', 'mit'):
+            realm = get_realm(string_id)
+            do_deactivate_realm(realm)
+            realm.save()
 
         result = self.client_post('/register/', {'email': email})
 

zerver/tests/tests.py

@@ -2296,6 +2296,9 @@ class TestMissedMessages(ZulipTestCase):
 class TestOpenRealms(ZulipTestCase):
     def test_open_realm_logic(self):
         # type: () -> None
+        realm = get_realm('simple')
+        do_deactivate_realm(realm)
+
         mit_realm = get_realm("mit")
         self.assertEqual(get_unique_open_realm(), None)
         mit_realm.restricted_to_domain = False

zerver/views/auth.py

@@ -340,7 +340,12 @@ def login_page(request, **kwargs):
         users_query = UserProfile.objects.select_related().filter(is_bot=False, is_active=True)
         users = users_query.order_by('email')[0:MAX_DEV_BACKEND_USERS]
         extra_context['direct_admins'] = [u.email for u in users if u.is_realm_admin]
-        extra_context['direct_users'] = [u.email for u in users if not u.is_realm_admin]
+        extra_context['direct_users'] = [
+            u.email for u in users
+            if not u.is_realm_admin and u.realm.string_id == 'zulip']
+        extra_context['community_users'] = [
+            u.email for u in users
+            if u.realm.string_id == 'simple']
     template_response = django_login_page(
         request, authentication_form=OurAuthenticationForm,
         extra_context=extra_context, **kwargs)

zilencer/management/commands/populate_db.py

@@ -35,7 +35,6 @@ def create_users(realm, name_list, bot_type=None):
     tos_version = settings.TOS_VERSION if bot_type is None else None
     bulk_create_users(realm, user_set, bot_type=bot_type, tos_version=tos_version)
 
-
 class Command(BaseCommand):
     help = "Populate a test database"
 
@@ -243,6 +242,8 @@ class Command(BaseCommand):
             ]
             create_users(zulip_realm, zulip_webhook_bots, bot_type=UserProfile.INCOMING_WEBHOOK_BOT)
 
+            create_simple_community_realm()
+
             if not options["test_suite"]:
                 # Initialize the email gateway bot as an API Super User
                 email_gateway_bot = UserProfile.objects.get(email__iexact=settings.EMAIL_GATEWAY_BOT)
@@ -396,3 +397,31 @@ def send_messages(data):
         recipients[num_messages] = (message_type, message.recipient.id, saved_data)
         num_messages += 1
     return tot_messages
+
+def create_simple_community_realm():
+    # type: () -> None
+    simple_realm = Realm.objects.create(
+        string_id="simple", name="Simple Realm", restricted_to_domain=False,
+        invite_required=False, org_type=Realm.COMMUNITY, domain="simple.com")
+
+    names = [
+        ("alice", "alice@example.com"),
+        ("bob", "bob@foo.edu"),
+        ("cindy", "cindy@foo.tv"),
+    ]
+    create_users(simple_realm, names)
+
+    user_profiles = UserProfile.objects.filter(realm__string_id='simple')
+    create_user_presences(user_profiles)
+
+def create_user_presences(user_profiles):
+    # type: (Iterable[UserProfile]) -> None
+    for user in user_profiles:
+        status = 1 # type: int
+        date = now()
+        client = get_client("website")
+        UserPresence.objects.get_or_create(
+            user_profile=user,
+            client=client,
+            timestamp=date,
+            status=status)