Guard translation methods with typescript to protect against invalid …

…usage (#26021)

src/async-components/structures/CompatibilityView.tsx

@@ -14,13 +14,14 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import * as React from "react";
-import { _t } from "matrix-react-sdk/src/languageHandler";
+import React, { ReactNode } from "react";
 import SdkConfig from "matrix-react-sdk/src/SdkConfig";
+
+import { _t } from "../../languageHandler";
+
 // directly import the style here as this layer does not support rethemedex at this time so no matrix-react-sdk
 // PostCSS variables will be accessible.
 import "../../../res/css/structures/ErrorView.pcss";
-import { ReactNode } from "react";
 
 interface IProps {
     onAccept(): void;
@@ -112,15 +113,13 @@ const CompatibilityView: React.FC<IProps> = ({ onAccept }) => {
                             <h2 id="step1_heading">{_t("Your browser can't run %(brand)s", { brand })}</h2>
                             <p>
                                 {_t(
-                                    "%(brand)s uses advanced browser features which aren't " +
-                                        "supported by your current browser.",
+                                    "%(brand)s uses advanced browser features which aren't supported by your current browser.",
                                     { brand },
                                 )}
                             </p>
                             <p>
                                 {_t(
-                                    "Please install <chromeLink>Chrome</chromeLink>, <firefoxLink>Firefox</firefoxLink>, " +
-                                        "or <safariLink>Safari</safariLink> for the best experience.",
+                                    "Please install <chromeLink>Chrome</chromeLink>, <firefoxLink>Firefox</firefoxLink>, or <safariLink>Safari</safariLink> for the best experience.",
                                     {},
                                     {
                                         chromeLink: (sub) => <a href="https://www.google.com/chrome">{sub}</a>,
@@ -131,8 +130,7 @@ const CompatibilityView: React.FC<IProps> = ({ onAccept }) => {
                             </p>
                             <p>
                                 {_t(
-                                    "You can continue using your current browser, but some or all features may not work " +
-                                        "and the look and feel of the application may be incorrect.",
+                                    "You can continue using your current browser, but some or all features may not work and the look and feel of the application may be incorrect.",
                                 )}
                             </p>
                             <button onClick={onAccept}>{_t("I understand the risks and wish to continue")}</button>

src/async-components/structures/ErrorView.tsx

@@ -15,7 +15,8 @@ limitations under the License.
 */
 
 import * as React from "react";
-import { _t } from "matrix-react-sdk/src/languageHandler";
+
+import { _t } from "../../languageHandler";
 
 // directly import the style here as this layer does not support rethemedex at this time so no matrix-react-sdk
 // PostCSS variables will be accessible.

src/components/views/auth/VectorAuthFooter.tsx

@@ -17,7 +17,8 @@ limitations under the License.
 
 import React, { ReactElement } from "react";
 import SdkConfig from "matrix-react-sdk/src/SdkConfig";
-import { _t } from "matrix-react-sdk/src/languageHandler";
+
+import { _t } from "../../../languageHandler";
 
 const VectorAuthFooter = (): ReactElement => {
     const brandingConfig = SdkConfig.getObject("branding");

src/languageHandler.tsx

@@ -0,0 +1,66 @@
+/*
+Copyright 2023 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 React from "react";
+import {
+    IVariables,
+    TranslatedString,
+    TranslationKey as ReactTranslationKey,
+    // eslint-disable-next-line camelcase
+    _t as react_t,
+    // eslint-disable-next-line camelcase
+    _td as react_td,
+    // eslint-disable-next-line camelcase
+    _tDom as react_tDom,
+    Tags,
+    UserFriendlyError as ReactUserFriendlyError,
+    ErrorOptions,
+} from "matrix-react-sdk/src/languageHandler";
+import { Leaves } from "matrix-react-sdk/src/@types/common";
+
+import type ReactEN from "matrix-react-sdk/src/i18n/strings/en_EN.json";
+import type EN from "./i18n/strings/en_EN.json";
+
+/**
+ * This module wraps languageHandler in the matrix-react-sdk and adds type casts to include translations
+ * which we know will be injected by webpack.
+ */
+
+export type TranslationKey = Leaves<typeof EN & typeof ReactEN, "|", string | { other: string }>;
+
+export class UserFriendlyError extends ReactUserFriendlyError {
+    public constructor(message: TranslationKey, substitutionVariablesAndCause?: IVariables & ErrorOptions) {
+        super(message as ReactTranslationKey, substitutionVariablesAndCause);
+    }
+}
+
+export function _td(s: TranslationKey): TranslationKey {
+    return react_td(s as ReactTranslationKey);
+}
+
+// eslint-next-line @typescript-eslint/naming-convention
+export function _t(text: TranslationKey, variables?: IVariables): string;
+export function _t(text: TranslationKey, variables: IVariables | undefined, tags: Tags): React.ReactNode;
+export function _t(text: TranslationKey, variables?: IVariables, tags?: Tags): TranslatedString {
+    return react_t(text as ReactTranslationKey, variables, tags!);
+}
+
+// eslint-next-line @typescript-eslint/naming-convention
+export function _tDom(text: TranslationKey, variables?: IVariables): TranslatedString;
+export function _tDom(text: TranslationKey, variables: IVariables, tags: Tags): React.ReactNode;
+export function _tDom(text: TranslationKey, variables?: IVariables, tags?: Tags): TranslatedString {
+    return react_tDom(text as ReactTranslationKey, variables!, tags!);
+}

src/vector/app.tsx

@@ -23,7 +23,6 @@ import "matrix-js-sdk/src/browser-index";
 
 import React, { ReactElement } from "react";
 import PlatformPeg from "matrix-react-sdk/src/PlatformPeg";
-import { UserFriendlyError } from "matrix-react-sdk/src/languageHandler";
 import AutoDiscoveryUtils from "matrix-react-sdk/src/utils/AutoDiscoveryUtils";
 import { AutoDiscovery, ClientConfig } from "matrix-js-sdk/src/autodiscovery";
 import * as Lifecycle from "matrix-react-sdk/src/Lifecycle";
@@ -38,6 +37,7 @@ import { ValidatedServerConfig } from "matrix-react-sdk/src/utils/ValidatedServe
 import { parseQs } from "./url_utils";
 import VectorBasePlatform from "./platform/VectorBasePlatform";
 import { getInitialScreenAfterLogin, getScreenFromLocation, init as initRouting, onNewScreen } from "./routing";
+import { UserFriendlyError } from "../languageHandler";
 
 // add React and ReactPerf to the global namespace, to make them easier to access via the console
 // this incidentally means we can forget our React imports in JSX files without penalty.
@@ -147,8 +147,7 @@ async function verifyServerConfig(): Promise<IConfigOptions> {
         if (hsUrl && (wkConfig || serverName)) {
             // noinspection ExceptionCaughtLocallyJS
             throw new UserFriendlyError(
-                "Invalid configuration: a default_hs_url can't be specified along with default_server_name " +
-                    "or default_server_config",
+                "Invalid configuration: a default_hs_url can't be specified along with default_server_name or default_server_config",
             );
         }
         if (incompatibleOptions.length < 1) {

src/vector/index.ts

@@ -199,8 +199,7 @@ async function start(): Promise<void> {
                 // This uses the default brand since the app config is unavailable.
                 return showError(_t("Your Element is misconfigured"), [
                     _t(
-                        "Your Element configuration contains invalid JSON. " +
-                            "Please correct the problem and reload the page.",
+                        "Your Element configuration contains invalid JSON. Please correct the problem and reload the page.",
                     ),
                     _t("The message from the parser is: %(message)s", {
                         message: error.message || _t("Invalid JSON"),

src/vector/init.tsx

@@ -184,4 +184,4 @@ export async function loadModules(): Promise<void> {
     }
 }
 
-export const _t = languageHandler._t;
+export { _t } from "../languageHandler";

src/vector/platform/ElectronPlatform.tsx

@@ -21,7 +21,6 @@ limitations under the License.
 import { UpdateCheckStatus, UpdateStatus } from "matrix-react-sdk/src/BasePlatform";
 import BaseEventIndexManager from "matrix-react-sdk/src/indexing/BaseEventIndexManager";
 import dis from "matrix-react-sdk/src/dispatcher/dispatcher";
-import { _t } from "matrix-react-sdk/src/languageHandler";
 import SdkConfig from "matrix-react-sdk/src/SdkConfig";
 import { IConfigOptions } from "matrix-react-sdk/src/IConfigOptions";
 import * as rageshake from "matrix-react-sdk/src/rageshake/rageshake";
@@ -48,6 +47,7 @@ import DesktopCapturerSourcePicker from "matrix-react-sdk/src/components/views/e
 import VectorBasePlatform from "./VectorBasePlatform";
 import { SeshatIndexManager } from "./SeshatIndexManager";
 import { IPCManager } from "./IPCManager";
+import { _t } from "../../languageHandler";
 
 interface SquirrelUpdate {
     releaseNotes: string;

src/vector/platform/VectorBasePlatform.ts

@@ -18,11 +18,11 @@ limitations under the License.
 */
 
 import BasePlatform from "matrix-react-sdk/src/BasePlatform";
-import { _t } from "matrix-react-sdk/src/languageHandler";
 
 import type { IConfigOptions } from "matrix-react-sdk/src/IConfigOptions";
 import { getVectorConfig } from "../getconfig";
 import Favicon from "../../favicon";
+import { _t } from "../../languageHandler";
 
 /**
  * Vector-specific extensions to the BasePlatform template

src/vector/platform/WebPlatform.ts

@@ -18,7 +18,6 @@ limitations under the License.
 
 import { UpdateCheckStatus, UpdateStatus } from "matrix-react-sdk/src/BasePlatform";
 import dis from "matrix-react-sdk/src/dispatcher/dispatcher";
-import { _t } from "matrix-react-sdk/src/languageHandler";
 import { hideToast as hideUpdateToast, showToast as showUpdateToast } from "matrix-react-sdk/src/toasts/UpdateToast";
 import { Action } from "matrix-react-sdk/src/dispatcher/actions";
 import { CheckUpdatesPayload } from "matrix-react-sdk/src/dispatcher/payloads/CheckUpdatesPayload";
@@ -27,6 +26,7 @@ import { logger } from "matrix-js-sdk/src/logger";
 
 import VectorBasePlatform from "./VectorBasePlatform";
 import { parseQs } from "../url_utils";
+import { _t } from "../../languageHandler";
 
 const POKE_RATE_MS = 10 * 60 * 1000; // 10 min