Implement room join UI

src/domain/navigation/index.ts

@@ -51,7 +51,7 @@ function allowsChild(parent: Segment<SegmentType> | undefined, child: Segment<Se
             // allowed root segments
             return type === "login" || type === "session" || type === "sso" || type === "logout";
         case "session":
-            return type === "room" || type === "rooms" || type === "settings" || type === "create-room";
+            return type === "room" || type === "rooms" || type === "settings" || type === "create-room" || type === "join-room";
         case "rooms":
             // downside of the approach: both of these will control which tile is selected
             return type === "room" || type === "empty-grid-tile";

src/domain/session/JoinRoomViewModel.ts

@@ -0,0 +1,63 @@
+/*
+Copyright 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.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ViewModel, Options as BaseOptions} from "../ViewModel";
+import {SegmentType} from "../navigation/index";
+import type {Session} from "../../matrix/Session.js";
+import {joinRoom} from "../../matrix/room/joinRoom";
+
+type Options = BaseOptions & {
+    session: Session;
+};
+
+export class JoinRoomViewModel extends ViewModel<SegmentType, Options> {
+    private _session: Session;
+    private _joinInProgress: boolean = false;
+    private _error: Error | undefined;
+
+    constructor(options: Readonly<Options>) {
+        super(options);
+        this._session = options.session;
+    }
+
+    async join(roomId: string): Promise<void> {
+        this._error = undefined;
+        this._joinInProgress = true;
+        this.emitChange("joinInProgress");
+        try {
+            const id = await joinRoom(roomId, this._session);
+            this.navigation.push("room", id);
+        }
+        catch (e) {
+            this._error = e;
+            this._joinInProgress = false;
+            this.emitChange("error");
+        }
+    }
+
+    get joinInProgress(): boolean {
+        return this._joinInProgress;
+    }
+
+    get status(): string | undefined {
+        if (this._error) {
+            return this._error.message;
+        } 
+        else if(this._joinInProgress){
+            return "Joining room";
+        }
+    }
+}

src/domain/session/SessionViewModel.js

@@ -25,6 +25,7 @@ import {SessionStatusViewModel} from "./SessionStatusViewModel.js";
 import {RoomGridViewModel} from "./RoomGridViewModel.js";
 import {SettingsViewModel} from "./settings/SettingsViewModel.js";
 import {CreateRoomViewModel} from "./CreateRoomViewModel.js";
+import {JoinRoomViewModel} from "./JoinRoomViewModel";
 import {ViewModel} from "../ViewModel";
 import {RoomViewModelObservable} from "./RoomViewModelObservable.js";
 import {RightPanelViewModel} from "./rightpanel/RightPanelViewModel.js";
@@ -45,6 +46,7 @@ export class SessionViewModel extends ViewModel {
         this._roomViewModelObservable = null;
         this._gridViewModel = null;
         this._createRoomViewModel = null;
+        this._joinRoomViewModel = null;
         this._setupNavigation();
         this._setupForcedLogoutOnAccessTokenInvalidation();
     }
@@ -83,6 +85,12 @@ export class SessionViewModel extends ViewModel {
         }));
         this._updateCreateRoom(createRoom.get());
 
+        const joinRoom = this.navigation.observe("join-room");
+        this.track(joinRoom.subscribe((joinRoomOpen) => {
+            this._updateJoinRoom(joinRoomOpen);
+        }));
+        this._updateJoinRoom(joinRoom.get());
+
         const lightbox = this.navigation.observe("lightbox");
         this.track(lightbox.subscribe(eventId => {
             this._updateLightbox(eventId);
@@ -121,7 +129,13 @@ export class SessionViewModel extends ViewModel {
     }
 
     get activeMiddleViewModel() {
-        return this._roomViewModelObservable?.get() || this._gridViewModel || this._settingsViewModel || this._createRoomViewModel;
+        return (
+            this._roomViewModelObservable?.get() ||
+            this._gridViewModel ||
+            this._settingsViewModel ||
+            this._createRoomViewModel ||
+            this._joinRoomViewModel
+        );
     }
 
     get roomGridViewModel() {
@@ -152,6 +166,10 @@ export class SessionViewModel extends ViewModel {
         return this._createRoomViewModel;
     }
 
+    get joinRoomViewModel() {
+        return this._joinRoomViewModel;
+    }
+
     _updateGrid(roomIds) {
         const changed = !(this._gridViewModel && roomIds);
         const currentRoomId = this.navigation.path.get("room");
@@ -286,6 +304,16 @@ export class SessionViewModel extends ViewModel {
         this.emitChange("activeMiddleViewModel");
     }
 
+    _updateJoinRoom(joinRoomOpen) {
+        if (this._joinRoomViewModel) {
+            this._joinRoomViewModel = this.disposeTracked(this._joinRoomViewModel);
+        }
+        if (joinRoomOpen) {
+            this._joinRoomViewModel = this.track(new JoinRoomViewModel(this.childOptions({session: this._client.session})));
+        }
+        this.emitChange("activeMiddleViewModel");
+    }
+
     _updateLightbox(eventId) {
         if (this._lightboxViewModel) {
             this._lightboxViewModel = this.disposeTracked(this._lightboxViewModel);

src/domain/session/leftpanel/LeftPanelViewModel.js

@@ -34,7 +34,6 @@ export class LeftPanelViewModel extends ViewModel {
         this._setupNavigation();
         this._closeUrl = this.urlCreator.urlForSegment("session");
         this._settingsUrl = this.urlCreator.urlForSegment("settings");
-        this._createRoomUrl = this.urlCreator.urlForSegment("create-room");
     }
 
     _mapTileViewModels(roomsBeingCreated, invites, rooms) {
@@ -74,8 +73,14 @@ export class LeftPanelViewModel extends ViewModel {
         return this._settingsUrl;
     }
 
-    get createRoomUrl() { return this._createRoomUrl; }
+    showCreateRoomView() {
+        this.navigation.push("create-room");
+    }
 
+    showJoinRoomView() {
+        this.navigation.push("join-room");
+    }
+
     _setupNavigation() {
         const roomObservable = this.navigation.observe("room");
         this.track(roomObservable.subscribe(roomId => this._open(roomId)));

src/domain/session/room/RoomViewModel.js

@@ -23,7 +23,7 @@ import {imageToInfo} from "../common.js";
 // TODO: remove fallback so default isn't included in bundle for SDK users that have their custom tileClassForEntry
 // this is a breaking SDK change though to make this option mandatory
 import {tileClassForEntry as defaultTileClassForEntry} from "./timeline/tiles/index";
-import {RoomStatus} from "../../../matrix/room/common";
+import {joinRoom} from "../../../matrix/room/joinRoom";
 
 export class RoomViewModel extends ViewModel {
     constructor(options) {
@@ -200,22 +200,11 @@ export class RoomViewModel extends ViewModel {
 
     async _processCommandJoin(roomName) {
         try {
-            const roomId = await this._options.client.session.joinRoom(roomName);
-            const roomStatusObserver = await this._options.client.session.observeRoomStatus(roomId);
-            await roomStatusObserver.waitFor(status => status === RoomStatus.Joined);
+            const session = this._options.client.session;
+            const roomId = await joinRoom(roomName, session);
             this.navigation.push("room", roomId);
         } catch (err) {
-            let exc;
-            if ((err.statusCode ?? err.status) === 400) {
-                exc = new Error(`/join : '${roomName}' was not legal room ID or room alias`);
-            } else if ((err.statusCode ?? err.status) === 404 || (err.statusCode ?? err.status) === 502 || err.message == "Internal Server Error") {
-                exc = new Error(`/join : room '${roomName}' not found`);
-            } else if ((err.statusCode ?? err.status) === 403) {
-                exc = new Error(`/join : you're not invited to join '${roomName}'`);
-            } else {
-                exc = err;
-            }
-            this._sendError = exc;
+            this._sendError = err;
             this._timelineError = null;
             this.emitChange("error");
         }

src/matrix/room/joinRoom.ts

@@ -0,0 +1,42 @@
+/*
+Copyright 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.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+import type {Session} from "../Session.js";
+import {RoomStatus} from "./common";
+
+/**
+ * Join a room and wait for it to arrive in the next sync
+ * @param roomId The id of the room to join
+ * @param session A session instance
+ */
+export async function joinRoom(roomId: string, session: Session): Promise<string> {
+    try {
+        const internalRoomId = await session.joinRoom(roomId);
+        const roomStatusObservable = await session.observeRoomStatus(internalRoomId);
+        await roomStatusObservable.waitFor((status: RoomStatus) => status === RoomStatus.Joined);
+        return internalRoomId;
+    }
+    catch (e) {
+        if ((e.statusCode ?? e.status) === 400) {
+            throw new Error(`'${roomId}' is not a legal room ID or alias`);
+        } else if ((e.statusCode ?? e.status) === 404 || (e.statusCode ?? e.status) === 502 || e.message == "Internal Server eor") {
+            throw new Error(`Room '${roomId}' could not be found`);
+        } else if ((e.statusCode ?? e.status) === 403) {
+            throw new Error(`You are not invited to join '${roomId}'`);
+        } else {
+            throw e;
+        }
+    }
+}

src/platform/web/ui/css/themes/element/theme.css

@@ -1180,7 +1180,7 @@ button.RoomDetailsView_row::after {
     gap: 12px;
 }
 
-.CreateRoomView, .RoomBeingCreated_error {
+.CreateRoomView, .JoinRoomView, .RoomBeingCreated_error {
     max-width: 400px;
 }
 
@@ -1211,3 +1211,14 @@ button.RoomDetailsView_row::after {
     background-position: center;
     background-size: 36px;
 }
+
+.JoinRoomView_status {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    margin-top: 10px;
+}
+
+.JoinRoomView_status .spinner {
+    margin-right: 5px;
+}

src/platform/web/ui/session/JoinRoomView.ts

@@ -0,0 +1,63 @@
+/*
+Copyright 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.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {TemplateView} from "../general/TemplateView";
+import type {JoinRoomViewModel} from "../../../../domain/session/JoinRoomViewModel";
+import {spinner} from "../common.js";
+
+export class JoinRoomView extends TemplateView<JoinRoomViewModel> {
+    render(t, vm) {
+        const input = t.input({
+            type: "text",
+            name: "id",
+            id: "id",
+            placeholder: vm.i18n`Enter a room id or alias`,
+            disabled: vm => vm.joinInProgress,
+        });
+        return t.main({className: "middle"}, 
+            t.div({className: "JoinRoomView centered-column"}, [
+                t.h2("Join room"),
+                t.form({className: "JoinRoomView_detailsForm form", onSubmit: evt => this.onSubmit(evt,  input.value)}, [
+                    t.div({className: "vertical-layout"}, [
+                        t.div({className: "stretch form-row text"}, [
+                            t.label({for: "id"}, vm.i18n`Room id`),
+                            input,
+                        ]),
+                    ]),
+                    t.div({className: "button-row"}, [
+                        t.button({
+                            className: "button-action primary",
+                            type: "submit",
+                            disabled: vm => vm.joinInProgress
+                        }, vm.i18n`Join`),
+                    ]),
+                    t.map(vm => vm.status, (status, t) => {
+                        return t.div({ className: "JoinRoomView_status" }, [
+                            spinner(t, { hidden: vm => !vm.joinInProgress }),
+                            t.span(status),
+                        ]);
+                    })
+                ])
+            ])
+        );
+    }
+
+    onSubmit(evt, id) {
+        evt.preventDefault();
+        this.value.join(id);
+    }
+}
+

src/platform/web/ui/session/SessionView.js

@@ -29,6 +29,7 @@ import {SettingsView} from "./settings/SettingsView.js";
 import {CreateRoomView} from "./CreateRoomView.js";
 import {RightPanelView} from "./rightpanel/RightPanelView.js";
 import {viewClassForTile} from "./room/common";
+import {JoinRoomView} from "./JoinRoomView";
 
 export class SessionView extends TemplateView {
     render(t, vm) {
@@ -48,6 +49,8 @@ export class SessionView extends TemplateView {
                     return new SettingsView(vm.settingsViewModel);
                 } else if (vm.createRoomViewModel) {
                     return new CreateRoomView(vm.createRoomViewModel);
+                } else if (vm.joinRoomViewModel) {
+                    return new JoinRoomView(vm.joinRoomViewModel);
                 } else if (vm.currentRoomViewModel) {
                     if (vm.currentRoomViewModel.kind === "invite") {
                         return new InviteView(vm.currentRoomViewModel);