events: Pass can_invite_others_to_realm to client using page_params.

This commit adds backend code for passing can_invite_others_to_realm
field to clients using the fetch_initial_state_data in the page_params
object.

Though this field is not used by webapp as of now, but will be used
to fix a bug of incorreclty showing the invite users option in
settings overlay in the next commit.

templates/zerver/api/changelog.md

@@ -10,6 +10,11 @@ below features are supported.
 
 ## Changes in Zulip 4.0
 
+**Feature level 51**
+
+* [`POST /register`](/api/register-queue): Added a new boolean field
+`can_invite_others_to_realm`.
+
 **Feature level 50**
 
 * [`POST /register`](/api/register-queue): Replaced `invite_by_admins_only`

version.py

@@ -30,7 +30,7 @@ DESKTOP_WARNING_VERSION = "5.2.0"
 #
 # Changes should be accompanied by documentation explaining what the
 # new level means in templates/zerver/api/changelog.md.
-API_FEATURE_LEVEL = 50
+API_FEATURE_LEVEL = 51
 
 # Bump the minor PROVISION_VERSION to indicate that folks should provision
 # only when going from an old version of the code to a newer version. Bump

zerver/lib/events.py

@@ -315,6 +315,7 @@ def fetch_initial_state_data(
 
         state["can_create_streams"] = settings_user.can_create_streams()
         state["can_subscribe_other_users"] = settings_user.can_subscribe_other_users()
+        state["can_invite_others_to_realm"] = settings_user.can_invite_others_to_realm()
         state["is_admin"] = settings_user.is_realm_admin
         state["is_owner"] = settings_user.is_realm_owner
         state["is_guest"] = settings_user.is_guest
@@ -593,6 +594,7 @@ def apply_event(
                     # Recompute properties based on is_admin/is_guest
                     state["can_create_streams"] = user_profile.can_create_streams()
                     state["can_subscribe_other_users"] = user_profile.can_subscribe_other_users()
+                    state["can_invite_others_to_realm"] = user_profile.can_invite_others_to_realm()
 
                     # TODO: Probably rather than writing the perfect
                     # live-update code for the case of racing with the
@@ -751,6 +753,7 @@ def apply_event(
             policy_permission_dict = {
                 "create_stream_policy": "can_create_streams",
                 "invite_to_stream_policy": "can_subscribe_other_users",
+                "invite_to_realm_policy": "can_invite_others_to_realm",
             }
 
             # Tricky interaction: Whether we can create streams and can subscribe other users

zerver/openapi/zulip.yaml

@@ -8366,6 +8366,15 @@ paths:
 
                           Whether the current user is allowed to subscribe other users to streams with
                           the organization's [streams policy](/help/configure-who-can-invite-to-streams).
+                      can_invite_others_to_realm:
+                        type: boolean
+                        description: |
+                          Present if `realm_user` is present in `fetch_event_types`.
+
+                          Whether the current user [is allowed to invite others]
+                          (/help/invite-new-users#change-who-can-send-invitations) to the organization.
+
+                          **Changes**: New in Zulip 4.0 (feature level 51).
                       is_admin:
                         type: boolean
                         description: |

zerver/tests/test_home.py

@@ -50,6 +50,7 @@ class HomeTest(ZulipTestCase):
         "avatar_url_medium",
         "bot_types",
         "can_create_streams",
+        "can_invite_others_to_realm",
         "can_subscribe_other_users",
         "color_scheme",
         "cross_realm_bots",