users: Add "(guest)" to user name at various places.

This commit adds code to get_display_full_name function
to add "(guest)" indicator to guest user names if
enable_guest_user_indicator setting is enabled in the
organization.

The get_display_full_name function is used in many parts
of the code and thus this commit adds the indicator in
following places -
- Message recipient row for DMs including the messages
shown in scheduled messages overlay.
- DMs list in left sidebar and its tooltips.
- DMs info recent conversations view.
- "other senders" tooltip in recent conversations view.
- Compose button text.
- User names shown on reaction element and its tooltip.
- Desktop notifications and the browser title.
- Results for a poll.

web/src/people.ts

@@ -424,6 +424,10 @@ export function get_display_full_name(user_id: number): string {
         return $t({defaultMessage: "Muted user"});
     }
 
+    if (should_add_guest_user_indicator(user_id)) {
+        return $t({defaultMessage: "{name} (guest)"}, {name: person.full_name});
+    }
+
     return person.full_name;
 }
 

web/tests/people.test.js

@@ -470,16 +470,32 @@ test_people("get_display_full_names", () => {
     people.add_active_user(steven);
     people.add_active_user(bob);
     people.add_active_user(charles);
-    const user_ids = [me.user_id, steven.user_id, bob.user_id, charles.user_id];
+    people.add_active_user(guest);
+    page_params.realm_enable_guest_user_indicator = true;
+
+    const user_ids = [me.user_id, steven.user_id, bob.user_id, charles.user_id, guest.user_id];
     let names = people.get_display_full_names(user_ids);
 
     // This doesn't do anything special for the current user. The caller has
     // to take care of such cases and do the appropriate.
-    assert.deepEqual(names, ["Me Myself", "Steven", "Bob van Roberts", "Charles Dickens"]);
+    assert.deepEqual(names, [
+        "Me Myself",
+        "Steven",
+        "Bob van Roberts",
+        "Charles Dickens",
+        "translated: Guest User (guest)",
+    ]);
 
     muted_users.add_muted_user(charles.user_id);
+    page_params.realm_enable_guest_user_indicator = false;
     names = people.get_display_full_names(user_ids);
-    assert.deepEqual(names, ["Me Myself", "Steven", "Bob van Roberts", "translated: Muted user"]);
+    assert.deepEqual(names, [
+        "Me Myself",
+        "Steven",
+        "Bob van Roberts",
+        "translated: Muted user",
+        "Guest User",
+    ]);
 });
 
 test_people("my_custom_profile_data", () => {