message_view: Live update on losing access to a stream.

This commit adds code to live update the message view when
user loses access to a stream and also remove the data of
messages from that stream.

web/src/message_store.ts

@@ -348,3 +348,9 @@ export function remove(message_ids: number[]): void {
         stored_messages.delete(message_id);
     }
 }
+
+export function get_message_ids_in_stream(stream_id: number): number[] {
+    return [...stored_messages.values()]
+        .filter((message) => message.type === "stream" && message.stream_id === stream_id)
+        .map((message) => message.id);
+}

web/src/server_events_dispatch.js

@@ -1,5 +1,4 @@
 import $ from "jquery";
-import assert from "minimalistic-assert";
 
 import * as activity_ui from "./activity_ui.ts";
 import * as alert_words from "./alert_words.ts";
@@ -29,9 +28,9 @@ import * as message_edit from "./message_edit.ts";
 import * as message_events from "./message_events.ts";
 import * as message_lists from "./message_lists.ts";
 import * as message_live_update from "./message_live_update.ts";
+import * as message_store from "./message_store.ts";
 import * as message_view from "./message_view.ts";
 import * as muted_users_ui from "./muted_users_ui.ts";
-import * as narrow_state from "./narrow_state.ts";
 import * as narrow_title from "./narrow_title.ts";
 import * as navbar_alerts from "./navbar_alerts.ts";
 import * as onboarding_steps from "./onboarding_steps.ts";
@@ -647,7 +646,6 @@ export function dispatch_normal_event(event) {
                 case "delete":
                     for (const stream_id of event.stream_ids) {
                         const was_subscribed = sub_store.get(stream_id).subscribed;
-                        const is_narrowed_to_stream = narrow_state.narrowed_to_stream_id(stream_id);
                         stream_data.delete_sub(stream_id);
                         stream_settings_ui.remove_stream(stream_id);
                         if (was_subscribed) {
@@ -670,10 +668,10 @@ export function dispatch_normal_event(event) {
                                 "zulip_update_announcements_stream_id",
                             );
                         }
-                        if (is_narrowed_to_stream) {
-                            assert(message_lists.current !== undefined);
-                            message_lists.current.update_trailing_bookend(true);
-                        }
+                        const message_ids = message_store.get_message_ids_in_stream(stream_id);
+                        unread_ops.process_read_messages_event(message_ids);
+                        message_events.remove_messages(message_ids);
+                        stream_topic_history.remove_history_for_stream(stream_id);
                     }
                     stream_list.update_subscribe_to_more_streams_link();
                     break;

web/src/stream_topic_history.ts

@@ -398,3 +398,14 @@ export function add_request_pending_for(stream_id: number): void {
 export function remove_request_pending_for(stream_id: number): void {
     request_pending_stream_ids.delete(stream_id);
 }
+
+export function remove_history_for_stream(stream_id: number): void {
+    // Currently only used when user loses access to a stream.
+    if (stream_dict.has(stream_id)) {
+        stream_dict.delete(stream_id);
+    }
+
+    if (fetched_stream_ids.has(stream_id)) {
+        fetched_stream_ids.delete(stream_id);
+    }
+}

web/tests/dispatch_subs.test.cjs

@@ -12,15 +12,14 @@ const event_fixtures = events.fixtures;
 const test_user = events.test_user;
 
 const compose_recipient = mock_esm("../src/compose_recipient");
-const message_lists = mock_esm("../src/message_lists");
-const narrow_state = mock_esm("../src/narrow_state");
+const message_events = mock_esm("../src/message_events");
 const overlays = mock_esm("../src/overlays");
 const settings_org = mock_esm("../src/settings_org");
 const settings_streams = mock_esm("../src/settings_streams");
 const stream_events = mock_esm("../src/stream_events");
 const stream_list = mock_esm("../src/stream_list");
 const stream_settings_ui = mock_esm("../src/stream_settings_ui");
-message_lists.current = {};
+const unread_ops = mock_esm("../src/unread_ops");
 
 const compose_state = zrequire("compose_state");
 const peer_data = zrequire("peer_data");
@@ -216,13 +215,6 @@ test("stream delete (normal)", ({override}) => {
 
     override(settings_streams, "update_default_streams_table", noop);
 
-    narrow_state.narrowed_to_stream_id = () => true;
-
-    let bookend_updates = 0;
-    override(message_lists.current, "update_trailing_bookend", () => {
-        bookend_updates += 1;
-    });
-
     const removed_stream_ids = [];
 
     override(stream_settings_ui, "remove_stream", (stream_id) => {
@@ -235,14 +227,12 @@ test("stream delete (normal)", ({override}) => {
     });
     override(stream_list, "update_subscribe_to_more_streams_link", noop);
 
+    override(unread_ops, "process_read_messages_event", noop);
+    override(message_events, "remove_messages", noop);
     dispatch(event);
 
     assert.deepEqual(removed_stream_ids, [event.stream_ids[0], event.stream_ids[1]]);
 
-    // We should possibly be able to make a single call to
-    // update_trailing_bookend, but we currently do it for each stream.
-    assert.equal(bookend_updates, 2);
-
     assert.equal(removed_sidebar_rows, 1);
 });
 
@@ -280,10 +270,12 @@ test("stream delete (special streams)", ({override}) => {
 
     override(settings_org, "sync_realm_settings", noop);
     override(settings_streams, "update_default_streams_table", noop);
-    override(message_lists.current, "update_trailing_bookend", noop);
     override(stream_list, "remove_sidebar_row", noop);
     override(stream_list, "update_subscribe_to_more_streams_link", noop);
 
+    override(unread_ops, "process_read_messages_event", noop);
+    override(message_events, "remove_messages", noop);
+
     dispatch(event);
 
     assert.deepEqual(removed_stream_ids, [event.stream_ids[0], event.stream_ids[1]]);
@@ -324,28 +316,20 @@ test("stream delete (stream is selected in compose)", ({override}) => {
 
     override(settings_streams, "update_default_streams_table", noop);
 
-    narrow_state.narrowed_to_stream_id = () => true;
-
-    let bookend_updates = 0;
-    override(message_lists.current, "update_trailing_bookend", () => {
-        bookend_updates += 1;
-    });
-
     let removed_sidebar_rows = 0;
     override(stream_list, "remove_sidebar_row", () => {
         removed_sidebar_rows += 1;
     });
     override(stream_list, "update_subscribe_to_more_streams_link", noop);
 
+    override(unread_ops, "process_read_messages_event", noop);
+    override(message_events, "remove_messages", noop);
+
     dispatch(event);
 
     assert.deepEqual(removed_stream_ids, [event.stream_ids[0], event.stream_ids[1]]);
 
     assert.equal(compose_state.stream_name(), "");
 
-    // We should possibly be able to make a single call to
-    // update_trailing_bookend, but we currently do it for each stream.
-    assert.equal(bookend_updates, 2);
-
     assert.equal(removed_sidebar_rows, 1);
 });

web/tests/message_store.test.cjs

@@ -401,3 +401,52 @@ test("remove", () => {
     assert.equal(message_store.get(message2.id).id, message2.id);
     assert.equal(message_store.get(message3.id), undefined);
 });
+
+test("get_message_ids_in_stream", () => {
+    const message1 = {
+        type: "stream",
+        sender_full_name: alice.full_name,
+        sender_id: alice.user_id,
+        stream_id: devel.stream_id,
+        stream: devel.name,
+        display_recipient: devel.name,
+        topic: "test",
+        id: 100,
+    };
+    const message2 = {
+        sender_email: "me@example.com",
+        sender_id: me.user_id,
+        type: "private",
+        display_recipient: convert_recipients([me, bob, cindy]),
+        flags: ["has_alert_word"],
+        is_me_message: false,
+        id: 101,
+    };
+    const message3 = {
+        type: "stream",
+        sender_full_name: cindy.full_name,
+        sender_id: cindy.user_id,
+        stream_id: denmark.stream_id,
+        stream: denmark.name,
+        display_recipient: denmark.name,
+        topic: "test",
+        id: 102,
+    };
+    const message4 = {
+        type: "stream",
+        sender_full_name: me.full_name,
+        sender_id: me.user_id,
+        stream_id: devel.stream_id,
+        stream: devel.name,
+        display_recipient: devel.name,
+        topic: "test",
+        id: 103,
+    };
+
+    for (const message of [message1, message2, message3, message4]) {
+        message_helper.process_new_message(message);
+    }
+
+    assert.deepEqual(message_store.get_message_ids_in_stream(devel.stream_id), [100, 103]);
+    assert.deepEqual(message_store.get_message_ids_in_stream(denmark.stream_id), [102]);
+});

web/tests/stream_topic_history.test.cjs

@@ -536,3 +536,36 @@ test("test_max_message_ids_in_channel_and_topics", () => {
         "topic 1",
     ]);
 });
+
+test("remove_history_for_stream", () => {
+    const stream_id = 55;
+    stream_topic_history.add_message({
+        stream_id,
+        message_id: 101,
+        topic_name: "toPic1",
+    });
+
+    stream_topic_history.add_message({
+        stream_id: 56,
+        message_id: 102,
+        topic_name: "topic2",
+    });
+    assert.equal(stream_topic_history.stream_has_topics(stream_id), true);
+    assert.equal(stream_topic_history.stream_has_topics(56), true);
+
+    stream_topic_history.remove_history_for_stream(stream_id);
+    assert.equal(stream_topic_history.stream_has_topics(stream_id), false);
+    assert.equal(stream_topic_history.stream_has_topics(56), true);
+
+    stream_topic_history.add_history(stream_id, [
+        {name: "local", max_id: 501},
+        {name: "hist2", max_id: 31},
+        {name: "hist1", max_id: 30},
+    ]);
+    assert.equal(stream_topic_history.has_history_for(stream_id), true);
+    assert.equal(stream_topic_history.stream_has_topics(stream_id), true);
+
+    stream_topic_history.remove_history_for_stream(stream_id);
+    assert.equal(stream_topic_history.stream_has_topics(stream_id), false);
+    assert.equal(stream_topic_history.has_history_for(stream_id), false);
+});