Add labs flag: Show only current profile on historical messages (#7815)

* Add labs flag: Show only current profile on historical messages

For https://github.com/vector-im/element-web/issues/3768
Related https://github.com/vector-im/element-web/issues/4677

* Use the member's user ID

src/components/views/avatars/MemberAvatar.tsx

@@ -1,6 +1,6 @@
 /*
 Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2019 The Matrix.org Foundation C.I.C.
+Copyright 2019 - 2022 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -27,6 +27,8 @@ import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { mediaFromMxc } from "../../../customisations/Media";
 import { CardContext } from '../right_panel/BaseCard';
 import UserIdentifierCustomisations from '../../../customisations/UserIdentifier';
+import SettingsStore from "../../../settings/SettingsStore";
+import { MatrixClientPeg } from "../../../MatrixClientPeg";
 
 interface IProps extends Omit<React.ComponentProps<typeof BaseAvatar>, "name" | "idName" | "url"> {
     member: RoomMember;
@@ -41,6 +43,7 @@ interface IProps extends Omit<React.ComponentProps<typeof BaseAvatar>, "name" |
     pushUserOnClick?: boolean;
     title?: string;
     style?: any;
+    forceHistorical?: boolean; // true to deny `feature_use_only_current_profiles` usage. Default false.
 }
 
 interface IState {
@@ -50,7 +53,7 @@ interface IState {
 }
 
 @replaceableComponent("views.avatars.MemberAvatar")
-export default class MemberAvatar extends React.Component<IProps, IState> {
+export default class MemberAvatar extends React.PureComponent<IProps, IState> {
     public static defaultProps = {
         width: 40,
         height: 40,
@@ -69,20 +72,27 @@ export default class MemberAvatar extends React.Component<IProps, IState> {
     }
 
     private static getState(props: IProps): IState {
-        if (props.member?.name) {
+        let member = props.member;
+        if (member && !props.forceHistorical && SettingsStore.getValue("feature_use_only_current_profiles")) {
+            const room = MatrixClientPeg.get().getRoom(member.roomId);
+            if (room) {
+                member = room.getMember(member.userId);
+            }
+        }
+        if (member?.name) {
             let imageUrl = null;
             const userTitle = UserIdentifierCustomisations.getDisplayUserIdentifier(
-                props.member.userId, { roomId: props.member?.roomId },
+                member.userId, { roomId: member?.roomId },
             );
-            if (props.member.getMxcAvatarUrl()) {
-                imageUrl = mediaFromMxc(props.member.getMxcAvatarUrl()).getThumbnailOfSourceHttp(
+            if (member.getMxcAvatarUrl()) {
+                imageUrl = mediaFromMxc(member.getMxcAvatarUrl()).getThumbnailOfSourceHttp(
                     props.width,
                     props.height,
                     props.resizeMethod,
                 );
             }
             return {
-                name: props.member.name,
+                name: member.name,
                 title: props.title || userTitle,
                 imageUrl: imageUrl,
             };

src/components/views/messages/SenderProfile.tsx

@@ -25,6 +25,8 @@ import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import UserIdentifier from '../../../customisations/UserIdentifier';
 import { TileShape } from '../rooms/EventTile';
+import SettingsStore from "../../../settings/SettingsStore";
+import { MatrixClientPeg } from "../../../MatrixClientPeg";
 
 interface IProps {
     mxEvent: MatrixEvent;
@@ -107,9 +109,17 @@ export default class SenderProfile extends React.Component<IProps, IState> {
         const colorClass = getUserNameColorClass(mxEvent.getSender());
         const { msgtype } = mxEvent.getContent();
 
-        const disambiguate = mxEvent.sender?.disambiguate;
-        const displayName = mxEvent.sender?.rawDisplayName || mxEvent.getSender() || "";
-        const mxid = mxEvent.sender?.userId || mxEvent.getSender() || "";
+        let member = mxEvent.sender;
+        if (SettingsStore.getValue("feature_use_only_current_profiles")) {
+            const room = MatrixClientPeg.get().getRoom(mxEvent.getRoomId());
+            if (room) {
+                member = room.getMember(member.userId);
+            }
+        }
+
+        const disambiguate = member?.disambiguate || mxEvent.sender?.disambiguate;
+        const displayName = member?.rawDisplayName || mxEvent.getSender() || "";
+        const mxid = member?.userId || mxEvent.getSender() || "";
 
         if (msgtype === MsgType.Emote && this.props.tileShape !== TileShape.ThreadPanel) {
             return null; // emote message must include the name so don't duplicate it

src/components/views/rooms/EventTile.tsx

@@ -1260,6 +1260,7 @@ export default class EventTile extends React.Component<IProps, IState> {
                         width={avatarSize}
                         height={avatarSize}
                         viewUserOnClick={true}
+                        forceHistorical={this.props.mxEvent.getType() === EventType.RoomMember}
                     />
                 </div>
             );

src/i18n/strings/en_EN.json

@@ -884,6 +884,7 @@
     "Show message previews for reactions in all rooms": "Show message previews for reactions in all rooms",
     "Offline encrypted messaging using dehydrated devices": "Offline encrypted messaging using dehydrated devices",
     "Show extensible event representation of events": "Show extensible event representation of events",
+    "Show current avatar and name for users in message history": "Show current avatar and name for users in message history",
     "Show info about bridges in room settings": "Show info about bridges in room settings",
     "Use new room breadcrumbs": "Use new room breadcrumbs",
     "New search experience": "New search experience",

src/settings/Settings.tsx

@@ -307,6 +307,13 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         displayName: _td("Show extensible event representation of events"),
         default: false,
     },
+    "feature_use_only_current_profiles": {
+        isFeature: true,
+        labsGroup: LabGroup.Rooms,
+        supportedLevels: LEVELS_FEATURE,
+        displayName: _td("Show current avatar and name for users in message history"),
+        default: false,
+    },
     "doNotDisturb": {
         supportedLevels: [SettingLevel.DEVICE],
         default: false,