From 00a7a31404f7beb4b8f45072a3bd3bf2ee7c040e Mon Sep 17 00:00:00 2001
From: Aman Agrawal <amanagr@zulip.com>
Date: Thu, 4 Sep 2025 16:52:40 +0530
Subject: [PATCH] pm_list: Show all DMs if header matches search term.

---
 web/src/pm_list.ts    | 13 ++++++++++++-
 web/src/sidebar_ui.ts | 15 ++++++++++-----
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/web/src/pm_list.ts b/web/src/pm_list.ts
index f6725a4398..fbc61f2c5b 100644
--- a/web/src/pm_list.ts
+++ b/web/src/pm_list.ts
@@ -1,5 +1,6 @@
 import $ from "jquery";
 import _ from "lodash";
+import assert from "minimalistic-assert";
 import * as z from "zod/mini";
 
 import type {Filter} from "./filter.ts";
@@ -12,6 +13,7 @@ import * as resize from "./resize.ts";
 import * as scroll_util from "./scroll_util.ts";
 import * as ui_util from "./ui_util.ts";
 import type {FullUnreadCountsData} from "./unread.ts";
+import * as util from "./util.ts";
 import * as vdom from "./vdom.ts";
 
 let prior_dom: vdom.Tag<PMNode> | undefined;
@@ -86,7 +88,10 @@ function set_dom_to(new_dom: vdom.Tag<PMNode>): void {
     prior_dom = new_dom;
 }
 
-export function update_private_messages(is_left_sidebar_search_active = false): void {
+export function update_private_messages(
+    is_left_sidebar_search_active = false,
+    header_text?: string,
+): void {
     const is_dm_section_expanded = is_left_sidebar_search_active || !private_messages_collapsed;
     $("#toggle-direct-messages-section-icon").toggleClass(
         "rotate-icon-down",
@@ -102,8 +107,14 @@ export function update_private_messages(is_left_sidebar_search_active = false):
         const $filter = $<HTMLInputElement>(".direct-messages-list-filter").expectOne();
         search_term = $filter.val()!;
     } else if (is_left_sidebar_search_active) {
+        assert(header_text !== undefined);
         search_term = ui_util.get_left_sidebar_search_term();
+        if (util.prefix_match({value: header_text, search_term})) {
+            // Show all DMs if the search term matches the header text.
+            search_term = "";
+        }
     }
+
     const conversations = pm_list_data.get_conversations(search_term);
     const pm_list_info = pm_list_data.get_list_info(zoomed, search_term);
     const conversations_to_be_shown = pm_list_info.conversations_to_be_shown;
diff --git a/web/src/sidebar_ui.ts b/web/src/sidebar_ui.ts
index 255cd292f2..426bda0522 100644
--- a/web/src/sidebar_ui.ts
+++ b/web/src/sidebar_ui.ts
@@ -313,10 +313,12 @@ export function update_expanded_views_for_search(search_term: string): void {
         search_term,
     });
     for (const view of expanded_views) {
-        let show_view = show_all_views || util.prefix_match({
-            value: view.name,
-            search_term,
-        });
+        let show_view =
+            show_all_views ||
+            util.prefix_match({
+                value: view.name,
+                search_term,
+            });
         const $view = $(`.top_left_${view.css_class_suffix}`);
 
         if (show_view && $view.hasClass("top_left_scheduled_messages")) {
@@ -603,7 +605,10 @@ function actually_update_left_sidebar_for_search(): void {
     }
 
     // Update left sidebar DM list.
-    pm_list.update_private_messages(is_left_sidebar_search_active);
+    pm_list.update_private_messages(
+        is_left_sidebar_search_active,
+        LEFT_SIDEBAR_DIRECT_MESSAGES_TITLE,
+    );
 
     // Update left sidebar channel list.
     stream_list.update_streams_sidebar();