typescript src/settings

src/settings/SettingsModal.tsx

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/ban-ts-comment */
 /*
 Copyright 2022 Matrix.org Foundation C.I.C.
 
@@ -15,6 +16,8 @@ limitations under the License.
 */
 
 import React from "react";
+import { Item } from "@react-stately/collections";
+
 import { Modal } from "../Modal";
 import styles from "./SettingsModal.module.css";
 import { TabContainer, TabItem } from "../tabs/Tabs";
@@ -22,15 +25,23 @@ import { ReactComponent as AudioIcon } from "../icons/Audio.svg";
 import { ReactComponent as VideoIcon } from "../icons/Video.svg";
 import { ReactComponent as DeveloperIcon } from "../icons/Developer.svg";
 import { SelectInput } from "../input/SelectInput";
-import { Item } from "@react-stately/collections";
+import {
-import { useMediaHandler } from "./useMediaHandler";
+  MediaHandlerContextInterface,
+  useMediaHandler,
+} from "./useMediaHandler";
 import { useSpatialAudio, useShowInspector } from "./useSetting";
 import { FieldRow, InputField } from "../input/Input";
 import { Button } from "../button";
 import { useDownloadDebugLog } from "./submit-rageshake";
 import { Body } from "../typography/Typography";
 
-export const SettingsModal = (props) => {
+interface Props {
+  setShowInspector: boolean;
+  showInspector: boolean;
+  [rest: string]: unknown;
+}
+
+export const SettingsModal = (props: Props) => {
   const {
     audioInput,
     audioInputs,
@@ -42,6 +53,7 @@ export const SettingsModal = (props) => {
     audioOutputs,
     setAudioOutput,
   } = useMediaHandler();
+
   const [spatialAudio, setSpatialAudio] = useSpatialAudio();
   const [showInspector, setShowInspector] = useShowInspector();
 
@@ -90,7 +102,8 @@ export const SettingsModal = (props) => {
               label="Spatial audio (experimental)"
               type="checkbox"
               checked={spatialAudio}
-              onChange={(e) => setSpatialAudio(e.target.checked)}
+              // @ts-ignore
+              onChange={(event: Event) => setSpatialAudio(event.target.checked)}
             />
           </FieldRow>
         </TabItem>
@@ -132,7 +145,8 @@ export const SettingsModal = (props) => {
               label="Show Call Inspector"
               type="checkbox"
               checked={showInspector}
-              onChange={(e) => setShowInspector(e.target.checked)}
+              // @ts-ignore
+              onChange={(e: Event) => setShowInspector(e.target.checked)}
             />
           </FieldRow>
           <FieldRow>

src/settings/rageshake.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/ban-ts-comment */
 /*
 Copyright 2017 OpenMarket Ltd
 Copyright 2018 New Vector Ltd
@@ -37,37 +38,60 @@ limitations under the License.
 //    actually timestamps. We then purge the remaining logs. We also do this
 //    purge on startup to prevent logs from accumulating.
 
-// the frequency with which we flush to indexeddb
 import { logger } from "matrix-js-sdk/src/logger";
 
+// the frequency with which we flush to indexeddb
 const FLUSH_RATE_MS = 30 * 1000;
 
 // the length of log data we keep in indexeddb (and include in the reports)
 const MAX_LOG_SIZE = 1024 * 1024 * 5; // 5 MB
 
 // A class which monkey-patches the global console and stores log lines.
+
+interface LogEntry {
+  id: string;
+  lines: Array<string>;
+  index: number;
+}
+
+interface Cursor {
+  id: string;
+  ts: number;
+}
+
+// interface CustomEventTarget extends EventTarget {
+//   result: Cursor;
+// }
 export class ConsoleLogger {
   logs = "";
 
-  monkeyPatch(consoleObj) {
+  monkeyPatch(consoleObj: Console): void {
     // Monkey-patch console logging
-    const consoleFunctionsToLevels = {
+
+    const consoleFunctionsToLevels: { [level: string]: string } = {
       log: "I",
       info: "I",
       warn: "W",
       error: "E",
     };
-    Object.keys(consoleFunctionsToLevels).forEach((fnName) => {
+
+    Object.keys(consoleFunctionsToLevels).forEach(
+      (fnName: "log" | "info" | "warn" | "error") => {
         const level = consoleFunctionsToLevels[fnName];
         const originalFn = consoleObj[fnName].bind(consoleObj);
-      consoleObj[fnName] = (...args) => {
+        consoleObj[fnName] = (...args: unknown[]) => {
           this.log(level, ...args);
           originalFn(...args);
         };
-    });
       }
+    );
+  }
+  // these functions get overwritten by the monkey patch
+  error(...args: unknown[]): void {}
+  warn(...args: unknown[]): void {}
+  info(...args: unknown[]): void {}
 
-  log(level, ...args) {
+  log(level: string, ...args: unknown[]): void {
     // We don't know what locale the user may be running so use ISO strings
     const ts = new Date().toISOString();
 
@@ -113,10 +137,10 @@ export class ConsoleLogger {
 
   /**
    * Retrieve log lines to flush to disk.
-   * @param {boolean} keepLogs True to not delete logs after flushing.
+   * @param {boolean} keepLogs True to not delete logs after flushing. Defaults to false.
    * @return {string} \n delimited log lines to flush.
    */
-  flush(keepLogs) {
+  flush(keepLogs = false): string {
     // The ConsoleLogger doesn't care how these end up on disk, it just
     // flushes them to the caller.
     if (keepLogs) {
@@ -131,11 +155,14 @@ export class ConsoleLogger {
 // A class which stores log lines in an IndexedDB instance.
 export class IndexedDBLogStore {
   index = 0;
-  db = null;
+  db: IDBDatabase = null;
-  flushPromise = null;
+  flushPromise: Promise<void> = null;
-  flushAgainPromise = null;
+  flushAgainPromise: Promise<void> = null;
+  indexedDB: IDBFactory;
+  logger: ConsoleLogger;
+  id: string;
 
-  constructor(indexedDB, logger) {
+  constructor(indexedDB: IDBFactory, logger: ConsoleLogger) {
     this.indexedDB = indexedDB;
     this.logger = logger;
     this.id = "instance-" + Math.random() + Date.now();
@@ -144,10 +171,10 @@ export class IndexedDBLogStore {
   /**
    * @return {Promise} Resolves when the store is ready.
    */
-  connect() {
+  connect(): Promise<void> {
     const req = this.indexedDB.open("logs");
-    return new Promise((resolve, reject) => {
+    return new Promise<void>((resolve, reject) => {
-      req.onsuccess = (event) => {
+      req.onsuccess = (event: Event) => {
         // @ts-ignore
         this.db = event.target.result;
         // Periodically flush logs to local storage / indexeddb
@@ -155,16 +182,16 @@ export class IndexedDBLogStore {
         resolve();
       };
 
-      req.onerror = (event) => {
+      req.onerror = (event: Event) => {
         const err =
           // @ts-ignore
           "Failed to open log database: " + event.target.error.name;
-        logger.error(err);
+        this.logger.error(err);
         reject(new Error(err));
       };
 
       // First time: Setup the object store
-      req.onupgradeneeded = (event) => {
+      req.onupgradeneeded = (event: IDBVersionChangeEvent) => {
         // @ts-ignore
         const db = event.target.result;
         const logObjStore = db.createObjectStore("logs", {
@@ -176,7 +203,7 @@ export class IndexedDBLogStore {
         logObjStore.createIndex("id", "id", { unique: false });
 
         logObjStore.add(
-          this.generateLogEntry(new Date() + " ::: Log database was created.")
+          this.generateLogEntry([new Date() + " ::: Log database was created."])
         );
 
         const lastModifiedStore = db.createObjectStore("logslastmod", {
@@ -206,7 +233,7 @@ export class IndexedDBLogStore {
    *
    * @return {Promise} Resolved when the logs have been flushed.
    */
-  flush() {
+  flush(): Promise<void> {
     // check if a flush() operation is ongoing
     if (this.flushPromise) {
       if (this.flushAgainPromise) {
@@ -225,7 +252,7 @@ export class IndexedDBLogStore {
     }
     // there is no flush promise or there was but it has finished, so do
     // a brand new one, destroying the chain which may have been built up.
-    this.flushPromise = new Promise((resolve, reject) => {
+    this.flushPromise = new Promise<void>((resolve, reject) => {
       if (!this.db) {
         // not connected yet or user rejected access for us to r/w to the db.
         reject(new Error("No connected database"));
@@ -242,10 +269,11 @@ export class IndexedDBLogStore {
         resolve();
       };
       txn.onerror = (event) => {
-        logger.error("Failed to flush logs : ", event);
+        this.logger.error("Failed to flush logs : ", event);
+        // @ts-ignore
         reject(new Error("Failed to write logs: " + event.target.errorCode));
       };
-      objStore.add(this.generateLogEntry(lines));
+      objStore.add(this.generateLogEntry(lines.split("\n")));
       const lastModStore = txn.objectStore("logslastmod");
       lastModStore.put(this.generateLastModifiedTime());
     }).then(() => {
@@ -264,12 +292,13 @@ export class IndexedDBLogStore {
    * log ID). The objects have said log ID in an "id" field and "lines" which
    * is a big string with all the new-line delimited logs.
    */
-  async consume() {
+
+  async consume(): Promise<Object[]> {
     const db = this.db;
 
     // Returns: a string representing the concatenated logs for this ID.
     // Stops adding log fragments when the size exceeds maxSize
-    function fetchLogs(id, maxSize) {
+    function fetchLogs(id: string, maxSize: number): Promise<string[]> {
       const objectStore = db
         .transaction("logs", "readonly")
         .objectStore("logs");
@@ -280,34 +309,35 @@ export class IndexedDBLogStore {
           .openCursor(IDBKeyRange.only(id), "prev");
         let lines = "";
         query.onerror = (event) => {
+          // @ts-ignore
           reject(new Error("Query failed: " + event.target.errorCode));
         };
         query.onsuccess = (event) => {
+          // @ts-ignore
           const cursor = event.target.result;
           if (!cursor) {
-            resolve(lines);
+            resolve(lines.split("\n"));
             return; // end of results
           }
           lines = cursor.value.lines + lines;
           if (lines.length >= maxSize) {
-            resolve(lines);
+            resolve(lines.split("\n"));
           } else {
             cursor.continue();
           }
         };
       });
     }
-
     // Returns: A sorted array of log IDs. (newest first)
-    function fetchLogIds() {
+    function fetchLogIds(): Promise<string[]> {
       // To gather all the log IDs, query for all records in logslastmod.
       const o = db
         .transaction("logslastmod", "readonly")
         .objectStore("logslastmod");
-      return selectQuery(o, undefined, (cursor) => {
+      return selectQuery(o, undefined, (cursor: Cursor) => {
         return {
-          id: cursor.value.id,
+          id: cursor.id,
-          ts: cursor.value.ts,
+          ts: cursor.ts,
         };
       }).then((res) => {
         // Sort IDs by timestamp (newest first)
@@ -318,14 +348,14 @@ export class IndexedDBLogStore {
           .map((a) => a.id);
       });
     }
-
+    function deleteLogs(id: string): Promise<void> {
-    function deleteLogs(id) {
       return new Promise((resolve, reject) => {
         const txn = db.transaction(["logs", "logslastmod"], "readwrite");
         const o = txn.objectStore("logs");
         // only load the key path, not the data which may be huge
         const query = o.index("id").openKeyCursor(IDBKeyRange.only(id));
         query.onsuccess = (event) => {
+          // @ts-ignore
           const cursor = event.target.result;
           if (!cursor) {
             return;
@@ -340,6 +370,7 @@ export class IndexedDBLogStore {
           reject(
             new Error(
               "Failed to delete logs for " +
+                // @ts-ignore
                 `'${id}' : ${event.target.errorCode}`
             )
           );
@@ -351,11 +382,14 @@ export class IndexedDBLogStore {
     }
 
     const allLogIds = await fetchLogIds();
-    let removeLogIds = [];
+    let removeLogIds: string[] = [];
     const logs = [];
     let size = 0;
     for (let i = 0; i < allLogIds.length; i++) {
-      const lines = await fetchLogs(allLogIds[i], MAX_LOG_SIZE - size);
+      const lines: string[] = await fetchLogs(
+        allLogIds[i],
+        MAX_LOG_SIZE - size
+      );
 
       // always add the log file: fetchLogs will truncate once the maxSize we give it is
       // exceeded, so we'll go over the max but only by one fragment's worth.
@@ -375,22 +409,22 @@ export class IndexedDBLogStore {
       }
     }
     if (removeLogIds.length > 0) {
-      logger.log("Removing logs: ", removeLogIds);
+      this.logger.log("Removing logs: ", removeLogIds);
       // Don't await this because it's non-fatal if we can't clean up
       // logs.
       Promise.all(removeLogIds.map((id) => deleteLogs(id))).then(
         () => {
-          logger.log(`Removed ${removeLogIds.length} old logs.`);
+          this.logger.log(`Removed ${removeLogIds.length} old logs.`);
         },
         (err) => {
-          logger.error(err);
+          this.logger.error(err);
         }
       );
     }
     return logs;
   }
 
-  generateLogEntry(lines) {
+  generateLogEntry(lines: string[]): LogEntry {
     return {
       id: this.id,
       lines: lines,
@@ -416,18 +450,22 @@ export class IndexedDBLogStore {
  * @return {Promise<T[]>} Resolves to an array of whatever you returned from
  * resultMapper.
  */
-function selectQuery(store, keyRange, resultMapper) {
+function selectQuery(
+  store: IDBObjectStore,
+  keyRange: IDBKeyRange,
+  resultMapper: (arg: Cursor) => Cursor
+): Promise<Cursor[]> {
   const query = store.openCursor(keyRange);
   return new Promise((resolve, reject) => {
-    const results = [];
+    const results: Cursor[] = [];
-    query.onerror = (event) => {
+    query.onerror = (event: Event) => {
       // @ts-ignore
       reject(new Error("Query failed: " + event.target.errorCode));
     };
     // collect results
-    query.onsuccess = (event) => {
+    query.onsuccess = (event: Event) => {
       // @ts-ignore
-      const cursor = event.target.result;
+      const cursor = event.target.result?.value;
       if (!cursor) {
         resolve(results);
         return; // end of results
@@ -437,6 +475,16 @@ function selectQuery(store, keyRange, resultMapper) {
     };
   });
 }
+declare global {
+  // eslint-disable-next-line no-var, camelcase
+  var mx_rage_store: IndexedDBLogStore;
+  // eslint-disable-next-line no-var, camelcase
+  var mx_rage_logger: ConsoleLogger;
+  // eslint-disable-next-line no-var, camelcase
+  var mx_rage_initPromise: Promise<void>;
+  // eslint-disable-next-line no-var, camelcase
+  var mx_rage_initStoragePromise: Promise<void>;
+}
 
 /**
  * Configure rage shaking support for sending bug reports.
@@ -445,7 +493,7 @@ function selectQuery(store, keyRange, resultMapper) {
  * be set up immediately for the logs.
  * @return {Promise} Resolves when set up.
  */
-export function init(setUpPersistence = true) {
+export function init(setUpPersistence = true): Promise<void> {
   if (global.mx_rage_initPromise) {
     return global.mx_rage_initPromise;
   }
@@ -465,7 +513,7 @@ export function init(setUpPersistence = true) {
  * then this no-ops.
  * @return {Promise} Resolves when complete.
  */
-export function tryInitStorage() {
+export function tryInitStorage(): Promise<void> {
   if (global.mx_rage_initStoragePromise) {
     return global.mx_rage_initStoragePromise;
   }

src/settings/submit-rageshake.ts

@@ -15,14 +15,30 @@ limitations under the License.
 */
 
 import { useCallback, useContext, useEffect, useState } from "react";
-import { getLogsForReport } from "./rageshake";
 import pako from "pako";
+import { ClientEvent, MatrixClient, MatrixEvent } from "matrix-js-sdk";
+import { OverlayTriggerState } from "@react-stately/overlays";
+
+import { getLogsForReport } from "./rageshake";
 import { useClient } from "../ClientContext";
 import { InspectorContext } from "../room/GroupCallInspector";
 import { useModalTriggerState } from "../Modal";
 
-export function useSubmitRageshake() {
+interface RageShakeSubmitOptions {
-  const { client } = useClient();
+  description: string;
+  roomId: string;
+  label: string;
+  sendLogs: boolean;
+  rageshakeRequestId: string;
+}
+
+export function useSubmitRageshake(): {
+  submitRageshake: (opts: RageShakeSubmitOptions) => Promise<void>;
+  sending: boolean;
+  sent: boolean;
+  error: Error;
+} {
+  const client: MatrixClient = useClient().client;
   const [{ json }] = useContext(InspectorContext);
 
   const [{ sending, sent, error }, setState] = useState({
@@ -57,9 +73,12 @@ export function useSubmitRageshake() {
           opts.description || "User did not supply any additional text."
         );
         body.append("app", "matrix-video-chat");
-        body.append("version", import.meta.env.VITE_APP_VERSION || "dev");
+        body.append(
+          "version",
+          (import.meta.env.VITE_APP_VERSION as string) || "dev"
+        );
         body.append("user_agent", userAgent);
-        body.append("installed_pwa", false);
+        body.append("installed_pwa", "false");
         body.append("touch_input", touchInput);
 
         if (client) {
@@ -181,7 +200,11 @@ export function useSubmitRageshake() {
 
         if (navigator.storage && navigator.storage.estimate) {
           try {
-            const estimate = await navigator.storage.estimate();
+            const estimate: {
+              quota?: number;
+              usage?: number;
+              usageDetails?: { [x: string]: unknown };
+            } = await navigator.storage.estimate();
             body.append("storageManager_quota", String(estimate.quota));
             body.append("storageManager_usage", String(estimate.usage));
             if (estimate.usageDetails) {
@@ -200,7 +223,11 @@ export function useSubmitRageshake() {
 
           for (const entry of logs) {
             // encode as UTF-8
-            let buf = new TextEncoder().encode(entry.lines);
+            let buf = new TextEncoder().encode(
+              typeof entry.lines == "string"
+                ? entry.lines
+                : entry.lines.join("\n")
+            );
 
             // compress
             buf = pako.gzip(buf);
@@ -225,7 +252,7 @@ export function useSubmitRageshake() {
         }
 
         await fetch(
-          import.meta.env.VITE_RAGESHAKE_SUBMIT_URL ||
+          (import.meta.env.VITE_RAGESHAKE_SUBMIT_URL as string) ||
             "https://element.io/bugreports/submit",
           {
             method: "POST",
@@ -250,7 +277,7 @@ export function useSubmitRageshake() {
   };
 }
 
-export function useDownloadDebugLog() {
+export function useDownloadDebugLog(): () => void {
   const [{ json }] = useContext(InspectorContext);
 
   const downloadDebugLog = useCallback(() => {
@@ -271,7 +298,10 @@ export function useDownloadDebugLog() {
   return downloadDebugLog;
 }
 
-export function useRageshakeRequest() {
+export function useRageshakeRequest(): (
+  roomId: string,
+  rageshakeRequestId: string
+) => void {
   const { client } = useClient();
 
   const sendRageshakeRequest = useCallback(
@@ -286,13 +316,16 @@ export function useRageshakeRequest() {
   return sendRageshakeRequest;
 }
 
-export function useRageshakeRequestModal(roomId) {
+export function useRageshakeRequestModal(roomId: string): {
+  modalState: OverlayTriggerState;
+  modalProps: any;
+} {
   const { modalState, modalProps } = useModalTriggerState();
-  const { client } = useClient();
+  const client: MatrixClient = useClient().client;
   const [rageshakeRequestId, setRageshakeRequestId] = useState();
 
   useEffect(() => {
-    const onEvent = (event) => {
+    const onEvent = (event: MatrixEvent) => {
       const type = event.getType();
 
       if (
@@ -305,10 +338,10 @@ export function useRageshakeRequestModal(roomId) {
       }
     };
 
-    client.on("event", onEvent);
+    client.on(ClientEvent.Event, onEvent);
 
     return () => {
-      client.removeListener("event", onEvent);
+      client.removeListener(ClientEvent.Event, onEvent);
     };
   }, [modalState.open, roomId, client, modalState]);
 

src/settings/useMediaHandler.tsx

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/ban-ts-comment */
 /*
 Copyright 2022 Matrix.org Foundation C.I.C.
 
@@ -14,6 +15,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import { MatrixClient } from "matrix-js-sdk";
 import React, {
   useState,
   useEffect,
@@ -23,9 +25,27 @@ import React, {
   createContext,
 } from "react";
 
-const MediaHandlerContext = createContext();
+export interface MediaHandlerContextInterface {
+  audioInput: string;
+  audioInputs: MediaDeviceInfo[];
+  setAudioInput: (deviceId: string) => void;
+  videoInput: string;
+  videoInputs: MediaDeviceInfo[];
+  setVideoInput: (deviceId: string) => void;
+  audioOutput: string;
+  audioOutputs: MediaDeviceInfo[];
+  setAudioOutput: (deviceId: string) => void;
+}
 
-function getMediaPreferences() {
+const MediaHandlerContext =
+  createContext<MediaHandlerContextInterface>(undefined);
+
+interface MediaPreferences {
+  audioInput?: string;
+  videoInput?: string;
+  audioOutput?: string;
+}
+function getMediaPreferences(): MediaPreferences {
   const mediaPreferences = localStorage.getItem("matrix-media-preferences");
 
   if (mediaPreferences) {
@@ -39,8 +59,8 @@ function getMediaPreferences() {
   }
 }
 
-function updateMediaPreferences(newPreferences) {
+function updateMediaPreferences(newPreferences: MediaPreferences): void {
-  const oldPreferences = getMediaPreferences(newPreferences);
+  const oldPreferences = getMediaPreferences();
 
   localStorage.setItem(
     "matrix-media-preferences",
@@ -50,8 +70,11 @@ function updateMediaPreferences(newPreferences) {
     })
   );
 }
-
+interface Props {
-export function MediaHandlerProvider({ client, children }) {
+  client: MatrixClient;
+  children: JSX.Element[];
+}
+export function MediaHandlerProvider({ client, children }: Props): JSX.Element {
   const [
     {
       audioInput,
@@ -72,7 +95,9 @@ export function MediaHandlerProvider({ client, children }) {
     );
 
     return {
+      // @ts-ignore
       audioInput: mediaHandler.audioInput,
+      // @ts-ignore
       videoInput: mediaHandler.videoInput,
       audioOutput: undefined,
       audioInputs: [],
@@ -84,7 +109,7 @@ export function MediaHandlerProvider({ client, children }) {
   useEffect(() => {
     const mediaHandler = client.getMediaHandler();
 
-    function updateDevices() {
+    function updateDevices(): void {
       navigator.mediaDevices.enumerateDevices().then((devices) => {
         const mediaPreferences = getMediaPreferences();
 
@@ -92,9 +117,10 @@ export function MediaHandlerProvider({ client, children }) {
           (device) => device.kind === "audioinput"
         );
         const audioConnected = audioInputs.some(
+          // @ts-ignore
           (device) => device.deviceId === mediaHandler.audioInput
         );
-
+        // @ts-ignore
         let audioInput = mediaHandler.audioInput;
 
         if (!audioConnected && audioInputs.length > 0) {
@@ -105,9 +131,11 @@ export function MediaHandlerProvider({ client, children }) {
           (device) => device.kind === "videoinput"
         );
         const videoConnected = videoInputs.some(
+          // @ts-ignore
           (device) => device.deviceId === mediaHandler.videoInput
         );
 
+        // @ts-ignore
         let videoInput = mediaHandler.videoInput;
 
         if (!videoConnected && videoInputs.length > 0) {
@@ -129,7 +157,9 @@ export function MediaHandlerProvider({ client, children }) {
         }
 
         if (
+          // @ts-ignore
           mediaHandler.videoInput !== videoInput ||
+          // @ts-ignore
           mediaHandler.audioInput !== audioInput
         ) {
           mediaHandler.setMediaInputs(audioInput, videoInput);
@@ -159,8 +189,8 @@ export function MediaHandlerProvider({ client, children }) {
     };
   }, [client]);
 
-  const setAudioInput = useCallback(
+  const setAudioInput: (deviceId: string) => void = useCallback(
-    (deviceId) => {
+    (deviceId: string) => {
       updateMediaPreferences({ audioInput: deviceId });
       setState((prevState) => ({ ...prevState, audioInput: deviceId }));
       client.getMediaHandler().setAudioInput(deviceId);
@@ -168,7 +198,7 @@ export function MediaHandlerProvider({ client, children }) {
     [client]
   );
 
-  const setVideoInput = useCallback(
+  const setVideoInput: (deviceId: string) => void = useCallback(
     (deviceId) => {
       updateMediaPreferences({ videoInput: deviceId });
       setState((prevState) => ({ ...prevState, videoInput: deviceId }));
@@ -177,12 +207,13 @@ export function MediaHandlerProvider({ client, children }) {
     [client]
   );
 
-  const setAudioOutput = useCallback((deviceId) => {
+  const setAudioOutput: (deviceId: any) => void = useCallback((deviceId) => {
     updateMediaPreferences({ audioOutput: deviceId });
     setState((prevState) => ({ ...prevState, audioOutput: deviceId }));
   }, []);
 
-  const context = useMemo(
+  const context: MediaHandlerContextInterface =
+    useMemo<MediaHandlerContextInterface>(
       () => ({
         audioInput,
         audioInputs,