Added last-message's author to group conversation list in left pane

stylesheets/components/MessageBody.scss

@@ -54,4 +54,8 @@
       background-color: $color-black-alpha-40;
     }
   }
+
+  &__author {
+    @include font-body-2-bold;
+  }
 }

ts/components/conversation/MessageBody.tsx

@@ -27,6 +27,7 @@ type OpenConversationActionType = (
 export type Props = {
   direction?: 'incoming' | 'outgoing';
   text: string;
+  author?: string;
   textAttachment?: Pick<AttachmentType, 'pending' | 'digest' | 'key'>;
   /** If set, all emoji will be the same size. Otherwise, just one emoji will be large. */
   disableJumbomoji?: boolean;
@@ -74,6 +75,7 @@ export function MessageBody({
   onIncreaseTextLength,
   openConversation,
   text,
+  author,
   textAttachment,
   kickOffBodyDownload,
 }: Props): JSX.Element {
@@ -144,6 +146,20 @@ export function MessageBody({
 
   return (
     <span>
+      {author && (
+        <>
+          <span className="MessageBody__author">
+            {renderEmoji({
+              i18n,
+              text: author,
+              sizeClass,
+              key: 0,
+              renderNonEmoji: renderNewLines,
+            })}
+          </span>
+          :{' '}
+        </>
+      )}
       {disableLinks ? (
         renderEmoji({
           i18n,

ts/components/conversationList/ConversationListItem.tsx

@@ -148,6 +148,7 @@ export const ConversationListItem: FunctionComponent<Props> = React.memo(
       messageText = (
         <MessageBody
           text={truncateMessageText(lastMessage.text)}
+          author={type === 'group' ? lastMessage.author : undefined}
           disableJumbomoji
           disableLinks
           i18n={i18n}

ts/model-types.d.ts

@@ -281,6 +281,7 @@ export type ConversationAttributesType = {
   isPinned?: boolean;
   lastMessageDeletedForEveryone?: boolean;
   lastMessageStatus?: LastMessageStatus | null;
+  lastMessageAuthor?: string | null;
   markedUnread?: boolean;
   messageCount?: number;
   messageCountBeforeMessageRequests?: number | null;

ts/models/conversations.ts

@@ -1703,6 +1703,7 @@ export class ConversationModel extends window.Backbone
       | {
           status?: LastMessageStatus;
           text: string;
+          author?: string;
           deletedForEveryone: false;
         }
       | { deletedForEveryone: true };
@@ -1715,6 +1716,7 @@ export class ConversationModel extends window.Backbone
         lastMessage = {
           status: dropNull(this.get('lastMessageStatus')),
           text: lastMessageText,
+          author: dropNull(this.get('lastMessageAuthor')),
           deletedForEveryone: false,
         };
       }
@@ -3992,6 +3994,7 @@ export class ConversationModel extends window.Backbone
               draft: null,
               draftTimestamp: null,
               lastMessage: model.getNotificationText(),
+              lastMessageAuthor: model.getAuthorText(),
               lastMessageStatus: 'sending' as const,
             };
 
@@ -4121,6 +4124,7 @@ export class ConversationModel extends window.Backbone
     this.set({
       lastMessage:
         (previewMessage ? previewMessage.getNotificationText() : '') || '',
+      lastMessageAuthor: previewMessage?.getAuthorText(),
       lastMessageStatus:
         (previewMessage
           ? getMessagePropStatus(previewMessage.attributes, ourConversationId)
@@ -4875,6 +4879,7 @@ export class ConversationModel extends window.Backbone
   async destroyMessages(): Promise<void> {
     this.set({
       lastMessage: null,
+      lastMessageAuthor: null,
       timestamp: null,
       active_at: null,
       pendingUniversalTimer: undefined,

ts/models/messages.ts

@@ -833,6 +833,17 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
     return body;
   }
 
+  getAuthorText(): string | undefined {
+    // if it's outgoing, it must be self-authored
+    const selfAuthor = isOutgoing(this.attributes)
+      ? window.i18n('you')
+      : undefined;
+
+    // if it's not selfAuthor and there's no incoming contact,
+    // it might be a group notification, so we return undefined
+    return selfAuthor ?? this.getIncomingContact()?.getTitle();
+  }
+
   getNotificationText(): string {
     const { text, emoji } = this.getNotificationData();
     const { attributes } = this;
@@ -1258,12 +1269,12 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
     if (!isIncoming(this.attributes)) {
       return null;
     }
-    const source = this.get('source');
+    const sourceUuid = this.get('sourceUuid');
-    if (!source) {
+    if (!sourceUuid) {
       return null;
     }
 
-    return window.ConversationController.getOrCreate(source, 'private');
+    return window.ConversationController.getOrCreate(sourceUuid, 'private');
   }
 
   async retrySend(): Promise<void> {
@@ -2723,6 +2734,7 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
         ) {
           conversation.set({
             lastMessage: message.getNotificationText(),
+            lastMessageAuthor: message.getAuthorText(),
             timestamp: message.get('sent_at'),
           });
         }

ts/state/ducks/conversations.ts

@@ -150,6 +150,7 @@ export type ConversationType = {
     | {
         status?: LastMessageStatus;
         text: string;
+        author?: string;
         deletedForEveryone: false;
       }
     | { deletedForEveryone: true };

ts/test-mock/benchmarks/group_send_bench.ts

@@ -125,7 +125,7 @@ const LAST_MESSAGE = 'start sending messages now';
       const item = leftPane.locator(
         '_react=BaseConversationListItem' +
           `[title = ${JSON.stringify(group.title)}] ` +
-          `>> ${JSON.stringify(LAST_MESSAGE)}`
+          `>> text=${LAST_MESSAGE}`
       );
       await item.click();
     }