Merge pull request #850 from vector-im/fix-798

Perform forced logout when access token is invalidated

src/domain/ForcedLogoutViewModel.ts

@@ -0,0 +1,81 @@
+/*
+Copyright 2021 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 {Options as BaseOptions, ViewModel} from "./ViewModel";
+import {Client} from "../matrix/Client.js";
+import {SegmentType} from "./navigation/index";
+
+type Options = { sessionId: string; } & BaseOptions;
+
+export class ForcedLogoutViewModel extends ViewModel<SegmentType, Options> {
+    private _sessionId: string;
+    private _error?: Error;
+    private _logoutPromise: Promise<void>;
+    private _showStatus: boolean = false;
+    private _showSpinner: boolean = false;
+
+    constructor(options: Options) {
+        super(options);
+        this._sessionId = options.sessionId;
+        // Start the logout process immediately without any user interaction
+        this._logoutPromise = this.forceLogout();
+    }
+
+    async forceLogout(): Promise<void> {
+        try {
+            const client = new Client(this.platform);
+            await client.startForcedLogout(this._sessionId);
+        }
+        catch (err) {
+            this._error = err;
+            // Show the error in the UI 
+            this._showSpinner = false;
+            this._showStatus = true;
+            this.emitChange("error");
+        }
+    }
+
+    async proceed(): Promise<void> {
+        /**
+         * The logout should already be completed because we started it from the ctor.
+         * In case the logout is still proceeding, we will show a message with a spinner. 
+         */
+        this._showSpinner = true;
+        this._showStatus = true;
+        this.emitChange("showStatus");
+        await this._logoutPromise;
+        // At this point, the logout is completed for sure.
+        if (!this._error) {
+            this.navigation.push("login", true);
+        }
+    }
+
+    get status(): string {
+        if (this._error) {
+            return this.i18n`Could not log out of device: ${this._error.message}`;
+        } else {
+            return this.i18n`Logging out… Please don't close the app.`;
+        }
+    }
+
+    get showStatus(): boolean {
+        return this._showStatus;
+    }
+
+    get showSpinner(): boolean {
+        return this._showSpinner;
+    }
+}

src/domain/RootViewModel.js

@@ -19,6 +19,7 @@ import {SessionViewModel} from "./session/SessionViewModel.js";
 import {SessionLoadViewModel} from "./SessionLoadViewModel.js";
 import {LoginViewModel} from "./login/LoginViewModel";
 import {LogoutViewModel} from "./LogoutViewModel";
+import {ForcedLogoutViewModel} from "./ForcedLogoutViewModel";
 import {SessionPickerViewModel} from "./SessionPickerViewModel.js";
 import {ViewModel} from "./ViewModel";
 
@@ -30,6 +31,7 @@ export class RootViewModel extends ViewModel {
         this._sessionLoadViewModel = null;
         this._loginViewModel = null;
         this._logoutViewModel = null;
+        this._forcedLogoutViewModel = null;
         this._sessionViewModel = null;
         this._pendingClient = null;
     }
@@ -38,18 +40,24 @@ export class RootViewModel extends ViewModel {
         this.track(this.navigation.observe("login").subscribe(() => this._applyNavigation()));
         this.track(this.navigation.observe("session").subscribe(() => this._applyNavigation()));
         this.track(this.navigation.observe("sso").subscribe(() => this._applyNavigation()));
+        this.track(this.navigation.observe("logout").subscribe(() => this._applyNavigation()));
         this._applyNavigation(true);
     }
 
     async _applyNavigation(shouldRestoreLastUrl) {
         const isLogin = this.navigation.path.get("login");
         const logoutSessionId = this.navigation.path.get("logout")?.value;
+        const isForcedLogout = this.navigation.path.get("forced")?.value;
         const sessionId = this.navigation.path.get("session")?.value;
         const loginToken = this.navigation.path.get("sso")?.value;
         if (isLogin) {
             if (this.activeSection !== "login") {
                 this._showLogin();
             }
+        } else if (logoutSessionId && isForcedLogout) {
+            if (this.activeSection !== "forced-logout") {
+                this._showForcedLogout(logoutSessionId);
+            }
         } else if (logoutSessionId) {
             if (this.activeSection !== "logout") {
                 this._showLogout(logoutSessionId);
@@ -136,6 +144,12 @@ export class RootViewModel extends ViewModel {
         });
     }
 
+    _showForcedLogout(sessionId) {
+        this._setSection(() => {
+            this._forcedLogoutViewModel = new ForcedLogoutViewModel(this.childOptions({sessionId}));
+        });
+    }
+
     _showSession(client) {
         this._setSection(() => {
             this._sessionViewModel = new SessionViewModel(this.childOptions({client}));
@@ -164,6 +178,8 @@ export class RootViewModel extends ViewModel {
             return "login";
         } else if (this._logoutViewModel) {
             return "logout";
+        } else if (this._forcedLogoutViewModel) {
+            return "forced-logout";
         } else if (this._sessionPickerViewModel) {
             return "picker";
         } else if (this._sessionLoadViewModel) {
@@ -180,6 +196,7 @@ export class RootViewModel extends ViewModel {
         this._sessionLoadViewModel = this.disposeTracked(this._sessionLoadViewModel);
         this._loginViewModel = this.disposeTracked(this._loginViewModel);
         this._logoutViewModel = this.disposeTracked(this._logoutViewModel);
+        this._forcedLogoutViewModel = this.disposeTracked(this._forcedLogoutViewModel);
         this._sessionViewModel = this.disposeTracked(this._sessionViewModel);
         // now set it again
         setter();
@@ -187,6 +204,7 @@ export class RootViewModel extends ViewModel {
         this._sessionLoadViewModel && this.track(this._sessionLoadViewModel);
         this._loginViewModel && this.track(this._loginViewModel);
         this._logoutViewModel && this.track(this._logoutViewModel);
+        this._forcedLogoutViewModel && this.track(this._forcedLogoutViewModel);
         this._sessionViewModel && this.track(this._sessionViewModel);
         this.emitChange("activeSection");
     }
@@ -195,6 +213,7 @@ export class RootViewModel extends ViewModel {
     get sessionViewModel() { return this._sessionViewModel; }
     get loginViewModel() { return this._loginViewModel; }
     get logoutViewModel() { return this._logoutViewModel; }
+    get forcedLogoutViewModel() { return this._forcedLogoutViewModel; }
     get sessionPickerViewModel() { return this._sessionPickerViewModel; }
     get sessionLoadViewModel() { return this._sessionLoadViewModel; }
 }

src/domain/navigation/index.ts

@@ -23,6 +23,7 @@ export type SegmentType = {
     "session": string | boolean;
     "sso": string;
     "logout": true;
+    "forced": true;
     "room": string;
     "rooms": string[];
     "settings": true;
@@ -58,6 +59,8 @@ function allowsChild(parent: Segment<SegmentType> | undefined, child: Segment<Se
             return type === "lightbox" || type === "right-panel";
         case "right-panel":
             return type === "details"|| type === "members" || type === "member";
+        case "logout":
+            return type === "forced";
         default:
             return false;
     }

src/domain/session/SessionViewModel.js

@@ -28,6 +28,7 @@ import {CreateRoomViewModel} from "./CreateRoomViewModel.js";
 import {ViewModel} from "../ViewModel";
 import {RoomViewModelObservable} from "./RoomViewModelObservable.js";
 import {RightPanelViewModel} from "./rightpanel/RightPanelViewModel.js";
+import {SyncStatus} from "../../matrix/Sync.js";
 
 export class SessionViewModel extends ViewModel {
     constructor(options) {
@@ -45,6 +46,7 @@ export class SessionViewModel extends ViewModel {
         this._gridViewModel = null;
         this._createRoomViewModel = null;
         this._setupNavigation();
+        this._setupForcedLogoutOnAccessTokenInvalidation();
     }
 
     _setupNavigation() {
@@ -93,6 +95,23 @@ export class SessionViewModel extends ViewModel {
         this._updateRightPanel();
     }
 
+    _setupForcedLogoutOnAccessTokenInvalidation() {
+        this.track(this._client.sync.status.subscribe(status => {
+            if (status === SyncStatus.Stopped) {
+                const error = this._client.sync.error;
+                if (error?.errcode === "M_UNKNOWN_TOKEN") {
+                    // Access token is no longer valid, so force the user to log out
+                    const segments = [
+                        this.navigation.segment("logout", this.id),
+                        this.navigation.segment("forced", true),
+                    ];
+                    const path = this.navigation.pathFrom(segments);
+                    this.navigation.applyPath(path);
+                }
+            }
+        }));
+    }
+
     get id() {
         return this._client.sessionId;
     }

src/matrix/Client.js

@@ -421,6 +421,14 @@ export class Client {
         });
     }
 
+    startForcedLogout(sessionId) {
+        return this._platform.logger.run("forced-logout", async log => {
+            this._sessionId = sessionId;
+            log.set("id", this._sessionId);
+            await this.deleteSession(log);
+        });
+    }
+
     dispose() {
         if (this._reconnectSubscription) {
             this._reconnectSubscription();

src/platform/web/ui/ForcedLogoutView.js

@@ -0,0 +1,47 @@
+/*
+Copyright 2020 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 {spinner} from "./common.js";
+
+export class ForcedLogoutView extends TemplateView {
+    render(t) {
+        return t.div({ className: "LogoutScreen" }, [
+            t.div({ className: "content" },
+                t.map(vm => vm.showStatus, (showStatus, t, vm) => {
+                    if (showStatus) {
+                        return t.p({ className: "status" }, [
+                            spinner(t, { hidden: vm => !vm.showSpinner }),
+                            t.span(vm => vm.status)
+                        ]);
+                    }
+                    else {
+                        return t.div([
+                            t.p("Your access token is no longer valid! You can reauthenticate in the next screen."),
+                            t.div({ className: "button-row" }, [
+                                t.button({
+                                    className: "button-action primary",
+                                    type: "submit",
+                                    onClick: () => vm.proceed(),
+                                }, vm.i18n`Proceed`)
+                            ]),
+                        ]);
+                    }
+                })
+            ),
+        ]);
+    }
+}

src/platform/web/ui/RootView.js

@@ -17,6 +17,7 @@ limitations under the License.
 import {SessionView} from "./session/SessionView.js";
 import {LoginView} from "./login/LoginView";
 import {LogoutView} from "./LogoutView.js";
+import {ForcedLogoutView} from "./ForcedLogoutView.js";
 import {SessionLoadView} from "./login/SessionLoadView.js";
 import {SessionPickerView} from "./login/SessionPickerView.js";
 import {TemplateView} from "./general/TemplateView";
@@ -39,6 +40,8 @@ export class RootView extends TemplateView {
                     return new LoginView(vm.loginViewModel);
                 case "logout":
                     return new LogoutView(vm.logoutViewModel);
+                case "forced-logout":
+                    return new ForcedLogoutView(vm.forcedLogoutViewModel);
                 case "picker":
                     return new SessionPickerView(vm.sessionPickerViewModel);
                 case "redirecting":