UI: refines thread list item (#23207)

It will now replies count and participants list. Also the title will be OM excerpt or user defined title, no more default "Thread" title. Lastly, the author of the last reply is also shown as prefix of it.

plugins/chat/app/controllers/chat/api/channel_threads_controller.rb

@@ -12,6 +12,7 @@ class Chat::Api::ChannelThreadsController < Chat::ApiController
             tracking: result.tracking,
             memberships: result.memberships,
             load_more_url: result.load_more_url,
+            threads_participants: result.participants,
           ),
           ::Chat::ThreadListSerializer,
           root: false,

plugins/chat/app/models/chat/threads_view.rb

@@ -2,15 +2,30 @@
 
 module Chat
   class ThreadsView
-    attr_reader :user, :channel, :threads, :tracking, :memberships, :load_more_url
+    attr_reader :user,
+                :channel,
+                :threads,
+                :tracking,
+                :memberships,
+                :load_more_url,
+                :threads_participants
 
-    def initialize(channel:, threads:, user:, tracking:, memberships:, load_more_url:)
+    def initialize(
+      channel:,
+      threads:,
+      user:,
+      tracking:,
+      memberships:,
+      load_more_url:,
+      threads_participants:
+    )
       @channel = channel
       @threads = threads
       @user = user
       @tracking = tracking
       @memberships = memberships
       @load_more_url = load_more_url
+      @threads_participants = threads_participants
     end
   end
 end

plugins/chat/app/serializers/chat/thread_list_serializer.rb

@@ -12,6 +12,7 @@ module Chat
           membership: object.memberships.find { |m| m.thread_id == thread.id },
           include_thread_preview: true,
           include_thread_original_message: true,
+          participants: object.threads_participants[thread.id],
           root: nil,
         )
       end

plugins/chat/app/services/chat/lookup_channel_threads.rb

@@ -33,6 +33,7 @@ module Chat
     model :threads
     step :fetch_tracking
     step :fetch_memberships
+    step :fetch_participants
     step :build_load_more_url
 
     # @!visibility private
@@ -133,6 +134,10 @@ module Chat
         )
     end
 
+    def fetch_participants(threads:, **)
+      context.participants = ::Chat::ThreadParticipantQuery.call(thread_ids: threads.map(&:id))
+    end
+
     def build_load_more_url(contract:, **)
       load_more_params = { offset: context.offset + context.limit }.to_query
       context.load_more_url =

plugins/chat/assets/javascripts/discourse/components/chat/thread-list/item.hbs

@@ -17,8 +17,13 @@
         <div class="chat-thread-list-item__om-user-avatar">
           <Chat::UserAvatar @user={{@thread.originalMessage.user}} />
         </div>
-        <div class="chat-thread-list-item__title overflow-ellipsis">
-          {{replace-emoji this.title}}
+        <div class="chat-thread-list-item__title">
+
+          {{#if this.title}}
+            {{replace-emoji this.title}}
+          {{else}}
+            {{@thread.originalMessage.excerpt}}
+          {{/if}}
         </div>
         <div class="chat-thread-list-item__unread-indicator">
           <Chat::ThreadList::Item::UnreadIndicator @thread={{@thread}} />
@@ -26,14 +31,26 @@
       </div>
 
       <div class="chat-thread-list-item__body">
-        {{replace-emoji (html-safe @thread.originalMessage.excerpt)}}
+        <span class="chat-thread-list-item__last-reply-author">
+          @{{@thread.preview.lastReplyUser.username}}:
+        </span>
+        <span class="chat-thread-list-item__last-reply-excerpt">
+          {{replace-emoji (html-safe @thread.preview.lastReplyExcerpt)}}
+        </span>
       </div>
 
       <div class="chat-thread-list-item__metadata">
-        <div class="chat-thread-list-item__participants"></div>
-        <div class="chat-thread-list-item__last-reply">
+        <Chat::Thread::Participants
+          @thread={{@thread}}
+          class="chat-thread-list-item__participants"
+        />
+        <span class="chat-thread-list-item__replies-count">
+          {{i18n "chat.thread.replies" count=@thread.preview.replyCount}}
+        </span>
+        <span class="chat-thread-list-item__metadata__separator">·</span>
+        <div class="chat-thread-list-item__last-reply-timestamp">
           {{#if @thread.preview.lastReplyCreatedAt}}
-            {{i18n "chat.thread.last_reply"}}
+            <span>{{i18n "chat.thread.last_reply"}}</span>
             {{format-date @thread.preview.lastReplyCreatedAt leaveAgo="true"}}
           {{/if}}
         </div>

plugins/chat/assets/javascripts/discourse/components/chat/thread/participants.hbs

@@ -1,5 +1,5 @@
 {{#if (gt @thread.preview.participantUsers.length 1)}}
-  <div class="chat-thread-participants">
+  <div class="chat-thread-participants" ...attributes>
     <div class="chat-thread-participants__avatar-group">
       {{#each @thread.preview.participantUsers as |user|}}
         <Chat::UserAvatar

plugins/chat/assets/javascripts/discourse/models/chat-thread.js

@@ -1,5 +1,4 @@
 import { getOwner } from "discourse-common/lib/get-owner";
-import I18n from "I18n";
 import ChatMessagesManager from "discourse/plugins/chat/discourse/lib/chat-messages-manager";
 import { escapeExpression } from "discourse/lib/utilities";
 import { tracked } from "@glimmer/tracking";
@@ -48,11 +47,7 @@ export default class ChatThread {
       ? ChatMessage.create(channel, args.original_message)
       : null;
 
-    this.title =
-      args.title ||
-      `${I18n.t("chat.thread.default_title", {
-        thread_id: this.id,
-      })}`;
+    this.title = args.title;
 
     if (args.current_user_membership) {
       this.currentUserMembership = UserChatThreadMembership.create(

plugins/chat/assets/stylesheets/common/chat-message-thread-indicator.scss

@@ -80,6 +80,7 @@
     align-items: center;
     justify-content: flex-end;
     gap: 0.25rem;
+    margin-left: 0.5rem;
   }
 
   &__replies-count {

plugins/chat/assets/stylesheets/common/chat-thread-list-item.scss

@@ -46,14 +46,34 @@
     }
   }
 
-  &__metadata {
-    display: flex;
-    justify-content: flex-end;
+  &__last-reply-author {
+    font-weight: 700;
   }
 
-  &__last-reply {
+  &__metadata {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+  }
+
+  &__metadata__separator {
+    padding-inline: 0.25rem;
+    font-weight: 700;
+  }
+
+  &__participants {
+    margin-right: 0.25rem;
+  }
+
+  &__replies-count {
+    margin-left: auto;
+  }
+
+  &__last-reply-timestamp,
+  &__replies-count {
     color: var(--secondary-low);
     font-size: var(--font-down-1);
+    @include ellipsis;
   }
 
   &__header {
@@ -66,6 +86,7 @@
   &__title {
     flex: 1 1 auto;
     font-weight: bold;
+    @include ellipsis;
   }
 
   &__unread-indicator {
@@ -77,16 +98,10 @@
     flex-direction: column;
     box-sizing: border-box;
     justify-content: center;
-    color: var(--primary);
-
-    &:hover,
-    &:visited {
-      color: var(--primary);
-    }
   }
 
   &__om-user-avatar {
-    margin-right: 0.5rem;
+    margin-right: 0.25rem;
     flex: 0 0 auto;
   }
 }

plugins/chat/assets/stylesheets/common/chat-thread-participants.scss

@@ -1,5 +1,4 @@
 .chat-thread-participants {
-  margin-left: 0.5rem;
   &__other-count {
     font-size: var(--font-down-2);
     color: var(--primary-high);
@@ -19,8 +18,6 @@
       width: auto !important;
 
       .avatar {
-        width: 24px;
-        height: 24px;
         padding: 0;
       }
     }
@@ -38,8 +35,6 @@
           margin-right: -10px;
         }
         .avatar {
-          width: 22px;
-          height: 22px;
           border: 1px solid var(--primary-very-low);
         }
       }

plugins/chat/config/locales/client.en.yml

@@ -579,7 +579,6 @@ en:
       thread:
         title: "Title"
         view_thread: View thread
-        default_title: "Thread"
         replies:
           one: "%{count} reply"
           other: "%{count} replies"

plugins/chat/spec/services/chat/lookup_channel_threads_spec.rb

@@ -260,6 +260,14 @@ RSpec.describe ::Chat::LookupChannelThreads do
       end
     end
 
+    describe "step - fetch_participants" do
+      it "returns correct participants" do
+        expect(result.participants).to eq(
+          ::Chat::ThreadParticipantQuery.call(thread_ids: [thread_1, thread_2, thread_3].map(&:id)),
+        )
+      end
+    end
+
     describe "step - build_load_more_url" do
       it "returns a url with the correct params" do
         expect(result.load_more_url).to eq("/chat/api/channels/#{channel_1.id}/threads?offset=10")

plugins/chat/spec/system/page_objects/chat/components/thread_list.rb

@@ -40,7 +40,7 @@ module PageObjects
         end
 
         def last_reply_datetime_selector(last_reply)
-          ".chat-thread-list-item__last-reply .relative-date[data-time='#{(last_reply.created_at.iso8601.to_time.to_f * 1000).to_i}']"
+          ".chat-thread-list-item__last-reply-timestamp .relative-date[data-time='#{(last_reply.created_at.iso8601.to_time.to_f * 1000).to_i}']"
         end
 
         def has_no_unread_item?(id)

plugins/chat/spec/system/thread_list/full_page_spec.rb

@@ -83,10 +83,11 @@ describe "Thread list in side panel | full page", type: :system do
       thread_2.add(current_user)
     end
 
-    it "shows a default title for threads without a title" do
+    it "shows the OM excerpt for threads without a title" do
       chat_page.visit_channel(channel)
       channel_page.open_thread_list
-      expect(page).to have_content(I18n.t("js.chat.thread.default_title", thread_id: thread_1.id))
+
+      expect(page).to have_content(thread_1.original_message.excerpt)
     end
 
     it "shows the thread title with emoji" do
@@ -125,6 +126,28 @@ describe "Thread list in side panel | full page", type: :system do
       )
     end
 
+    it "shows replies count" do
+      chat_page.visit_channel(channel)
+      channel_page.open_thread_list
+
+      expect(thread_list_page.item_by_id(thread_1.id)).to have_css(
+        ".chat-thread-list-item__replies-count",
+        text: I18n.t("js.chat.thread.replies", count: thread_1.replies_count_cache),
+      )
+    end
+
+    it "shows participants" do
+      chat_page.visit_channel(channel)
+      channel_page.open_thread_list
+
+      expect(thread_list_page.item_by_id(thread_1.id)).to have_css(
+        ".avatar[title='#{current_user.username}']",
+      )
+      expect(thread_list_page.item_by_id(thread_1.id)).to have_css(
+        ".avatar[title='#{other_user.username}']",
+      )
+    end
+
     it "opens a thread" do
       chat_page.visit_channel(channel)
       channel_page.open_thread_list