v8.0.1-rc.1

Remove redundant lint dependencies

.eslintrc.js

@@ -1,71 +1,15 @@
 module.exports = {
-    parser: "babel-eslint", // now needed for class properties
-    parserOptions: {
-        sourceType: "module",
-        ecmaFeatures: {
-        }
-    },
+    extends: ["matrix-org"],
+    plugins: [
+        "babel",
+    ],
     env: {
         browser: true,
         node: true,
-
-        // babel's transform-runtime converts references to ES6 globals such as
-        // Promise and Map to core-js polyfills, so we can use ES6 globals.
-        es6: true,
-        jest: true,
     },
-    extends: ["eslint:recommended", "google"],
-    plugins: [
-        "babel",
-        "jest",
-    ],
+
     rules: {
-        // rules we've always adhered to or now do
-        "max-len": ["error", {
-            code: 90,
-            ignoreComments: true,
-        }],
-        curly: ["error", "multi-line"],
-        "prefer-const": ["error"],
-        "comma-dangle": ["error", {
-            arrays: "always-multiline",
-            objects: "always-multiline",
-            imports: "always-multiline",
-            exports: "always-multiline",
-            functions: "always-multiline",
-        }],
-
-        // loosen jsdoc requirements a little
-        "require-jsdoc": ["error", {
-            require: {
-                FunctionDeclaration: false,
-            }
-        }],
-        "valid-jsdoc": ["error", {
-            requireParamDescription: false,
-            requireReturn: false,
-            requireReturnDescription: false,
-        }],
-
-        // rules we do not want from eslint-recommended
-        "no-console": ["off"],
-        "no-constant-condition": ["off"],
-        "no-empty": ["error", { "allowEmptyCatch": true }],
-
-        // rules we do not want from the google styleguide
-        "object-curly-spacing": ["off"],
-        "spaced-comment": ["off"],
-        "guard-for-in": ["off"],
-
-        // in principle we prefer single quotes, but life is too short
-        quotes: ["off"],
-
-        // rules we'd ideally like to adhere to, but the current
-        // code does not (in most cases because it's still ES5)
-        // we set these to warnings, and assert that the number
-        // of warnings doesn't exceed a given threshold
         "no-var": ["warn"],
-        "brace-style": ["warn", "1tbs", {"allowSingleLine": true}],
         "prefer-rest-params": ["warn"],
         "prefer-spread": ["warn"],
         "one-var": ["warn"],
@@ -79,10 +23,19 @@ module.exports = {
             "asyncArrow": "always",
         }],
         "arrow-parens": "off",
-
-        // eslint's built in no-invalid-this rule breaks with class properties
-        "no-invalid-this": "off",
-        // so we replace it with a version that is class property aware
-        "babel/no-invalid-this": "error",
-    }
-}
+        "prefer-promise-reject-errors": "off",
+        "quotes": "off",
+        "indent": "off",
+        "no-constant-condition": "off",
+        "no-async-promise-executor": "off",
+    },
+    overrides: [{
+        "files": ["src/**/*.{ts, tsx}"],
+        "extends": ["matrix-org/ts"],
+        "rules": {
+            // While we're converting to ts we make heavy use of this
+            "@typescript-eslint/no-explicit-any": "off",
+            "quotes": "off",
+        },
+    }],
+};

CHANGELOG.md

@@ -1,3 +1,16 @@
+Changes in [8.0.1-rc.1](https://github.com/matrix-org/matrix-js-sdk/releases/tag/v8.0.1-rc.1) (2020-07-31)
+==========================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-js-sdk/compare/v8.0.0...v8.0.1-rc.1)
+
+ * Remove redundant lint dependencies
+   [\#1426](https://github.com/matrix-org/matrix-js-sdk/pull/1426)
+ * Upload all keys when we start using a new key backup version
+   [\#1428](https://github.com/matrix-org/matrix-js-sdk/pull/1428)
+ * Expose countSessionsNeedingBackup
+   [\#1429](https://github.com/matrix-org/matrix-js-sdk/pull/1429)
+ * Configure and use new eslint package
+   [\#1422](https://github.com/matrix-org/matrix-js-sdk/pull/1422)
+
 Changes in [8.0.0](https://github.com/matrix-org/matrix-js-sdk/releases/tag/v8.0.0) (2020-07-27)
 ================================================================================================
 [Full Changelog](https://github.com/matrix-org/matrix-js-sdk/compare/v7.1.0...v8.0.0)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "matrix-js-sdk",
-  "version": "8.0.0",
+  "version": "8.0.1-rc.1",
   "description": "Matrix Client-Server SDK for Javascript",
   "scripts": {
     "prepare": "yarn build",
@@ -13,10 +13,9 @@
     "build:compile-browser": "mkdirp dist && browserify -d src/browser-index.js -p [ tsify -p ./tsconfig.json ] -t [ babelify --sourceMaps=inline --presets [ @babel/preset-env @babel/preset-typescript ] ] | exorcist dist/browser-matrix.js.map > dist/browser-matrix.js",
     "build:minify-browser": "terser dist/browser-matrix.js --compress --mangle --source-map --output dist/browser-matrix.min.js",
     "gendoc": "jsdoc -c jsdoc.json -P package.json",
-    "lint": "yarn lint:types && yarn lint:ts && yarn lint:js",
-    "lint:js": "eslint --max-warnings 81 src spec",
+    "lint": "yarn lint:types && yarn lint:js",
+    "lint:js": "eslint --max-warnings 76 src spec",
     "lint:types": "tsc --noEmit",
-    "lint:ts": "tslint --project ./tsconfig.json -t stylish",
     "test": "jest spec/ --coverage --testEnvironment node",
     "test:watch": "jest spec/ --coverage --testEnvironment node --watch"
   },
@@ -75,10 +74,9 @@
     "babelify": "^10.0.0",
     "better-docs": "^1.4.7",
     "browserify": "^16.5.0",
-    "eslint": "^5.12.0",
-    "eslint-config-google": "^0.7.1",
+    "eslint": "7.3.1",
+    "eslint-config-matrix-org": "^0.1.2",
     "eslint-plugin-babel": "^5.3.0",
-    "eslint-plugin-jest": "^23.0.4",
     "exorcist": "^1.0.1",
     "fake-indexeddb": "^3.0.0",
     "jest": "^24.9.0",

spec/integ/matrix-client-retrying.spec.js

@@ -90,7 +90,7 @@ describe("MatrixClient retrying", function() {
         // wait for the localecho of ev1 to be updated
         const p3 = new Promise((resolve, reject) => {
             room.on("Room.localEchoUpdated", (ev0) => {
-                if(ev0 === ev1) {
+                if (ev0 === ev1) {
                     resolve();
                 }
             });

spec/unit/room.spec.js

@@ -1373,7 +1373,7 @@ describe("Room", function() {
             let hasThrown = false;
             try {
                 await room.loadMembersIfNeeded();
-            } catch(err) {
+            } catch (err) {
                 hasThrown = true;
             }
             expect(hasThrown).toEqual(true);

spec/unit/scheduler.spec.js

@@ -143,7 +143,7 @@ describe("MatrixScheduler", function() {
         deferA.reject({});
         try {
             await globalA;
-        } catch(err) {
+        } catch (err) {
             await Promise.resolve();
             expect(procCount).toEqual(2);
         }

src/browser-index.js

@@ -34,7 +34,7 @@ matrixcs.request(function(opts, fn) {
 let indexedDB;
 try {
     indexedDB = global.indexedDB;
-} catch(e) {}
+} catch (e) {}
 
 // if our browser (appears to) support indexeddb, use an indexeddb crypto store.
 if (indexedDB) {

src/client.js

@@ -1169,6 +1169,7 @@ wrapCryptoFuncs(MatrixClient, [
     "isCrossSigningReady",
     "getCryptoTrustCrossSignedDevices",
     "setCryptoTrustCrossSignedDevices",
+    "countSessionsNeedingBackup",
 ]);
 
 /**
@@ -1925,7 +1926,7 @@ MatrixClient.prototype._restoreKeyBackup = function(
     let backupPubKey;
     try {
         backupPubKey = decryption.init_with_private_key(privKey);
-    } catch(e) {
+    } catch (e) {
         decryption.free();
         throw e;
     }
@@ -3801,7 +3802,9 @@ MatrixClient.prototype.paginateEventTimeline = function(eventTimeline, opts) {
         return pendingRequest;
     }
 
-    let path, params, promise;
+    let path;
+    let params;
+    let promise;
     const self = this;
 
     if (isNotifTimeline) {
@@ -4221,7 +4224,8 @@ MatrixClient.prototype.getRoomPushRule = function(scope, roomId) {
  */
 MatrixClient.prototype.setRoomMutePushRule = function(scope, roomId, mute) {
     const self = this;
-    let deferred, hasDontNotifyRule;
+    let deferred;
+    let hasDontNotifyRule;
 
     // Get the existing room-kind push rule if any
     const roomPushRule = this.getRoomPushRule(scope, roomId);

src/crypto/index.js

@@ -1399,6 +1399,12 @@ Crypto.prototype._checkAndStartKeyBackup = async function() {
             );
             this._baseApis.disableKeyBackup();
             this._baseApis.enableKeyBackup(backupInfo);
+            // We're now using a new backup, so schedule all the keys we have to be
+            // uploaded to the new backup. This is a bit of a workaround to upload
+            // keys to a new backup in *most* cases, but it won't cover all cases
+            // because we don't remember what backup version we uploaded keys to:
+            // see https://github.com/vector-im/riot-web/issues/14833
+            await this.scheduleAllGroupSessionsForBackup();
         } else {
             logger.log("Backup version " + backupInfo.version + " still current");
         }
@@ -2374,7 +2380,7 @@ Crypto.prototype.setRoomEncryption = async function(roomId, config, inhibitDevic
     // after all the in-memory state (_roomEncryptors and _roomList) has been updated
     // to avoid races when calling this method multiple times. Hence keep a hold of the promise.
     let storeConfigPromise = null;
-    if(!existingConfig) {
+    if (!existingConfig) {
         storeConfigPromise = this._roomList.setRoomEncryption(roomId, config);
     }
 
@@ -2407,7 +2413,7 @@ Crypto.prototype.setRoomEncryption = async function(roomId, config, inhibitDevic
         // which is never used (inside riot at least)
         // but didn't want to remove it as it technically would
         // be a breaking change.
-        if(!this.inhibitDeviceQuery) {
+        if (!this.inhibitDeviceQuery) {
             this._deviceList.refreshOutdatedDeviceLists();
         }
     } else {
@@ -2712,7 +2718,8 @@ Crypto.prototype.scheduleAllGroupSessionsForBackup = async function() {
 /**
  * Marks all group sessions as needing to be backed up without scheduling
  * them to upload in the background.
- * @returns {Promise<int>} Resolves to the number of sessions requiring a backup.
+ * @returns {Promise<int>} Resolves to the number of sessions now requiring a backup
+ *     (which will be equal to the number of sessions in the store).
  */
 Crypto.prototype.flagAllGroupSessionsForBackup = async function() {
     await this._cryptoStore.doTxn(
@@ -2735,6 +2742,14 @@ Crypto.prototype.flagAllGroupSessionsForBackup = async function() {
     return remaining;
 };
 
+/**
+ * Counts the number of end to end session keys that are waiting to be backed up
+ * @returns {Promise<int>} Resolves to the number of sessions requiring backup
+ */
+Crypto.prototype.countSessionsNeedingBackup = function() {
+    return this._cryptoStore.countSessionsNeedingBackup();
+};
+
 /**
  * Perform any background tasks that can be done before a message is ready to
  * send, in order to speed up sending of the message.

src/crypto/store/indexeddb-crypto-store-backend.js

@@ -131,7 +131,7 @@ export class Backend {
 
         cursorReq.onsuccess = (ev) => {
             const cursor = ev.target.result;
-            if(!cursor) {
+            if (!cursor) {
                 // no match found
                 callback(null);
                 return;

src/crypto/verification/SAS.js

@@ -430,7 +430,7 @@ export class SAS extends Base {
                         try {
                             await this._sendMAC(olmSAS, macMethod);
                             resolve();
-                        } catch(err) {
+                        } catch (err) {
                             reject(err);
                         }
                     },

src/http-api.js

@@ -890,7 +890,7 @@ function getResponseContentType(response) {
 
     try {
         return parseContentType(contentType);
-    } catch(e) {
+    } catch (e) {
         throw new Error(`Error parsing Content-Type '${contentType}': ${e}`);
     }
 }

src/index.ts

@@ -22,6 +22,7 @@ matrixcs.request(request);
 utils.runPolyfills();
 
 try {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
     const crypto = require('crypto');
     utils.setCrypto(crypto);
 } catch (err) {

src/matrix.ts

@@ -187,7 +187,7 @@ export function createClient(opts: ICreateClientOpts | string) {
  * @param {requestCallback} callback The request callback.
  */
 
- /**
+/**
   * The request callback interface for performing HTTP requests. This matches the
   * API for the {@link https://github.com/request/request#requestoptions-callback|
   * request NPM module}. The SDK will implement a callback which meets this

src/models/event-timeline-set.js

@@ -647,7 +647,8 @@ EventTimelineSet.prototype.compareEventOrdering = function(eventId1, eventId2) {
     if (timeline1 === timeline2) {
         // both events are in the same timeline - figure out their
         // relative indices
-        let idx1, idx2;
+        let idx1;
+        let idx2;
         const events = timeline1.getEvents();
         for (let idx = 0; idx < events.length &&
              (idx1 === undefined || idx2 === undefined); idx++) {

src/models/room-member.js

@@ -282,9 +282,9 @@ RoomMember.prototype.getAvatarUrl =
  * @return {string} the mxc avatar url
  */
 RoomMember.prototype.getMxcAvatarUrl = function() {
-    if(this.events.member) {
+    if (this.events.member) {
         return this.events.member.getDirectionalContent().avatar_url;
-    } else if(this.user) {
+    } else if (this.user) {
         return this.user.avatarUrl;
     }
     return null;

src/models/room-state.js

@@ -673,7 +673,7 @@ RoomState.prototype._maySendEventOfType = function(eventType, userId, state) {
         const userPowerLevel = power_levels.users && power_levels.users[userId];
         if (Number.isFinite(userPowerLevel)) {
             powerLevel = userPowerLevel;
-        } else if(Number.isFinite(power_levels.users_default)) {
+        } else if (Number.isFinite(power_levels.users_default)) {
             powerLevel = power_levels.users_default;
         }
 

src/models/room.js

@@ -1900,14 +1900,14 @@ function calculateRoomName(room, userId, ignoreRoomNameEvent) {
     // let's try to figure out who was here before
     let leftNames = otherNames;
     // if we didn't have heroes, try finding them in the room state
-    if(!leftNames.length) {
+    if (!leftNames.length) {
         leftNames = room.currentState.getMembers().filter((m) => {
             return m.userId !== userId &&
                 m.membership !== "invite" &&
                 m.membership !== "join";
         }).map((m) => m.name);
     }
-    if(leftNames.length) {
+    if (leftNames.length) {
         return `Empty room (was ${memberNamesToRoomName(leftNames)})`;
     } else {
         return "Empty room";

src/realtime-callbacks.js

@@ -185,8 +185,8 @@ function _runCallbacks() {
  */
 function binarySearch(array, func) {
     // min is inclusive, max exclusive.
-    let min = 0,
-        max = array.length;
+    let min = 0;
+    let max = array.length;
 
     while (min < max) {
         const mid = (min + max) >> 1;

src/sync.js

@@ -701,7 +701,7 @@ SyncApi.prototype._syncFromCache = async function(savedSync) {
 
     try {
         await this._processSyncResponse(syncEventData, data);
-    } catch(e) {
+    } catch (e) {
         logger.error("Error processing cached sync", e.stack || e);
     }
 
@@ -774,7 +774,7 @@ SyncApi.prototype._sync = async function(syncOptions) {
 
     try {
         await this._processSyncResponse(syncEventData, data);
-    } catch(e) {
+    } catch (e) {
         // log the exception with stack if we have it, else fall back
         // to the plain description
         logger.error("Caught /sync error", e.stack || e);
@@ -894,7 +894,7 @@ SyncApi.prototype._onSyncError = function(err, syncOptions) {
     logger.error("/sync error %s", err);
     logger.error(err);
 
-    if(this._shouldAbortSync(err)) {
+    if (this._shouldAbortSync(err)) {
         return;
     }
 

src/timeline-window.js

@@ -396,7 +396,8 @@ TimelineWindow.prototype.getEvents = function() {
         // (Note that both this._start.index and this._end.index are relative
         // to their respective timelines' BaseIndex).
         //
-        let startIndex = 0, endIndex = events.length;
+        let startIndex = 0;
+        let endIndex = events.length;
         if (timeline === this._start.timeline) {
             startIndex = this._start.index + timeline.getBaseIndex();
         }

src/utils.ts

@@ -21,7 +21,6 @@ limitations under the License.
  */
 
 import unhomoglyph from 'unhomoglyph';
-import {ConnectionError} from "./http-api";
 
 /**
  * Encode a dictionary of query parameters.
@@ -50,7 +49,7 @@ export function encodeParams(params: Record<string, string>): string {
  * @return {string} The result of replacing all template variables e.g. '/foo/baz'.
  */
 export function encodeUri(pathTemplate: string,
-                          variables: Record<string, string>): string {
+    variables: Record<string, string>): string {
     for (const key in variables) {
         if (!variables.hasOwnProperty(key)) {
             continue;
@@ -86,7 +85,7 @@ export function map<T, S>(array: T[], fn: (t: T) => S): S[] {
  * @return {Array} A new array with the results of the function.
  */
 export function filter<T>(array: T[],
-                          fn: (t: T, i?: number, a?: T[]) => boolean): T[] {
+    fn: (t: T, i?: number, a?: T[]) => boolean): T[] {
     const results: T[] = [];
     for (let i = 0; i < array.length; i++) {
         if (fn(array[i], i, array)) {
@@ -152,10 +151,10 @@ export function forEach<T>(array: T[], fn: (t: T, i: number) => void) {
  * the given function.
  */
 export function findElement<T>(
-        array: T[],
-        fn: (t: T, i?: number, a?: T[]) => boolean,
-        reverse?: boolean
-    ) {
+    array: T[],
+    fn: (t: T, i?: number, a?: T[]) => boolean,
+    reverse?: boolean,
+) {
     let i;
     if (reverse) {
         for (i = array.length - 1; i >= 0; i--) {
@@ -183,10 +182,10 @@ export function findElement<T>(
  * @return {boolean} True if an element was removed.
  */
 export function removeElement<T>(
-        array: T[],
-        fn: (t: T, i?: number, a?: T[]) => boolean,
-        reverse?: boolean
-    ) {
+    array: T[],
+    fn: (t: T, i?: number, a?: T[]) => boolean,
+    reverse?: boolean,
+) {
     let i;
     let removed;
     if (reverse) {
@@ -294,7 +293,7 @@ export function deepCompare(x: any, y: any): boolean {
 
     // special-case NaN (since NaN !== NaN)
     if (typeof x === 'number' && isNaN(x) && isNaN(y)) {
-         return true;
+        return true;
     }
 
     // special-case null (since typeof null == 'object', but null.constructor
@@ -369,10 +368,10 @@ export function deepCompare(x: any, y: any): boolean {
  *
  * @return {Object} target
  */
-export function extend() {
-    const target = arguments[0] || {};
-    for (let i = 1; i < arguments.length; i++) {
-        const source = arguments[i];
+export function extend(...restParams) {
+    const target = restParams[0] || {};
+    for (let i = 1; i < restParams.length; i++) {
+        const source = restParams[i];
         if (!source) continue;
         for (const propName in source) { // eslint-disable-line guard-for-in
             target[propName] = source[propName];
@@ -390,36 +389,36 @@ export function runPolyfills() {
     // SOURCE:
     // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
     if (!Array.prototype.filter) {
-      Array.prototype.filter = function(fun: Function/*, thisArg*/) {
-        if (this === void 0 || this === null) {
-          throw new TypeError();
-        }
-
-        const t = Object(this);
-        const len = t.length >>> 0;
-        if (typeof fun !== 'function') {
-          throw new TypeError();
-        }
-
-        const res = [];
-        const thisArg = arguments.length >= 2 ? arguments[1] : void 0;
-        for (let i = 0; i < len; i++) {
-          if (i in t) {
-            const val = t[i];
-
-            // NOTE: Technically this should Object.defineProperty at
-            //       the next index, as push can be affected by
-            //       properties on Object.prototype and Array.prototype.
-            //       But that method's new, and collisions should be
-            //       rare, so use the more-compatible alternative.
-            if (fun.call(thisArg, val, i, t)) {
-              res.push(val);
+        // eslint-disable-next-line no-extend-native
+        Array.prototype.filter = function(fun: Function/*, thisArg*/, ...restProps) {
+            if (this === void 0 || this === null) {
+                throw new TypeError();
             }
-          }
-        }
 
-        return res;
-      };
+            const t = Object(this);
+            const len = t.length >>> 0;
+            if (typeof fun !== 'function') {
+                throw new TypeError();
+            }
+
+            const res = [];
+            const thisArg = restProps ? restProps[0] : void 0;
+            for (let i = 0; i < len; i++) {
+                if (i in t) {
+                    const val = t[i];
+
+                    // NOTE: Technically this should Object.defineProperty at
+                    //       the next index, as push can be affected by
+                    //       properties on Object.prototype and Array.prototype.
+                    //       But that method's new, and collisions should be
+                    //       rare, so use the more-compatible alternative.
+                    if (fun.call(thisArg, val, i, t)) {
+                        res.push(val);
+                    }
+                }
+            }
+            return res;
+        };
     }
 
     //                Array.prototype.map
@@ -429,151 +428,156 @@ export function runPolyfills() {
     // Production steps of ECMA-262, Edition 5, 15.4.4.19
     // Reference: http://es5.github.io/#x15.4.4.19
     if (!Array.prototype.map) {
-      Array.prototype.map = function(callback, thisArg) {
-        let T, k;
+        // eslint-disable-next-line no-extend-native
+        Array.prototype.map = function(callback, thisArg) {
+            let T;
+            let k;
 
-        if (this === null || this === undefined) {
-          throw new TypeError(' this is null or not defined');
-        }
+            if (this === null || this === undefined) {
+                throw new TypeError(' this is null or not defined');
+            }
 
-        // 1. Let O be the result of calling ToObject passing the |this|
-        //    value as the argument.
-        const O = Object(this);
+            // 1. Let O be the result of calling ToObject passing the |this|
+            //    value as the argument.
+            const O = Object(this);
 
-        // 2. Let lenValue be the result of calling the Get internal
-        //    method of O with the argument "length".
-        // 3. Let len be ToUint32(lenValue).
-        const len = O.length >>> 0;
+            // 2. Let lenValue be the result of calling the Get internal
+            //    method of O with the argument "length".
+            // 3. Let len be ToUint32(lenValue).
+            const len = O.length >>> 0;
 
-        // 4. If IsCallable(callback) is false, throw a TypeError exception.
-        // See: http://es5.github.com/#x9.11
-        if (typeof callback !== 'function') {
-          throw new TypeError(callback + ' is not a function');
-        }
+            // 4. If IsCallable(callback) is false, throw a TypeError exception.
+            // See: http://es5.github.com/#x9.11
+            if (typeof callback !== 'function') {
+                throw new TypeError(callback + ' is not a function');
+            }
 
-        // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
-        if (arguments.length > 1) {
-          T = thisArg;
-        }
+            // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
+            if (arguments.length > 1) {
+                T = thisArg;
+            }
 
-        // 6. Let A be a new array created as if by the expression new Array(len)
-        //    where Array is the standard built-in constructor with that name and
-        //    len is the value of len.
-        const A = new Array(len);
+            // 6. Let A be a new array created as if by the expression new Array(len)
+            //    where Array is the standard built-in constructor with that name and
+            //    len is the value of len.
+            const A = new Array(len);
 
-        // 7. Let k be 0
-        k = 0;
+            // 7. Let k be 0
+            k = 0;
 
-        // 8. Repeat, while k < len
-        while (k < len) {
-          let kValue, mappedValue;
+            // 8. Repeat, while k < len
+            while (k < len) {
+                let kValue;
+                let mappedValue;
 
-          // a. Let Pk be ToString(k).
-          //   This is implicit for LHS operands of the in operator
-          // b. Let kPresent be the result of calling the HasProperty internal
-          //    method of O with argument Pk.
-          //   This step can be combined with c
-          // c. If kPresent is true, then
-          if (k in O) {
-            // i. Let kValue be the result of calling the Get internal
-            //    method of O with argument Pk.
-            kValue = O[k];
+                // a. Let Pk be ToString(k).
+                //   This is implicit for LHS operands of the in operator
+                // b. Let kPresent be the result of calling the HasProperty internal
+                //    method of O with argument Pk.
+                //   This step can be combined with c
+                // c. If kPresent is true, then
+                if (k in O) {
+                    // i. Let kValue be the result of calling the Get internal
+                    //    method of O with argument Pk.
+                    kValue = O[k];
 
-            // ii. Let mappedValue be the result of calling the Call internal
-            //     method of callback with T as the this value and argument
-            //     list containing kValue, k, and O.
-            mappedValue = callback.call(T, kValue, k, O);
+                    // ii. Let mappedValue be the result of calling the Call internal
+                    //     method of callback with T as the this value and argument
+                    //     list containing kValue, k, and O.
+                    mappedValue = callback.call(T, kValue, k, O);
 
-            // iii. Call the DefineOwnProperty internal method of A with arguments
-            // Pk, Property Descriptor
-            // { Value: mappedValue,
-            //   Writable: true,
-            //   Enumerable: true,
-            //   Configurable: true },
-            // and false.
+                    // iii. Call the DefineOwnProperty internal method of A with arguments
+                    // Pk, Property Descriptor
+                    // { Value: mappedValue,
+                    //   Writable: true,
+                    //   Enumerable: true,
+                    //   Configurable: true },
+                    // and false.
 
-            // In browsers that support Object.defineProperty, use the following:
-            // Object.defineProperty(A, k, {
-            //   value: mappedValue,
-            //   writable: true,
-            //   enumerable: true,
-            //   configurable: true
-            // });
+                    // In browsers that support Object.defineProperty, use the following:
+                    // Object.defineProperty(A, k, {
+                    //   value: mappedValue,
+                    //   writable: true,
+                    //   enumerable: true,
+                    //   configurable: true
+                    // });
 
-            // For best browser support, use the following:
-            A[k] = mappedValue;
-          }
-          // d. Increase k by 1.
-          k++;
-        }
+                    // For best browser support, use the following:
+                    A[k] = mappedValue;
+                }
+                // d. Increase k by 1.
+                k++;
+            }
 
-        // 9. return A
-        return A;
-      };
+            // 9. return A
+            return A;
+        };
     }
 
     //                Array.prototype.forEach
     // ========================================================
     // SOURCE:
-  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
     // Production steps of ECMA-262, Edition 5, 15.4.4.18
     // Reference: http://es5.github.io/#x15.4.4.18
     if (!Array.prototype.forEach) {
-      Array.prototype.forEach = function(callback, thisArg) {
-        let T, k;
+        // eslint-disable-next-line no-extend-native
+        Array.prototype.forEach = function(callback, thisArg) {
+            let T;
+            let k;
 
-        if (this === null || this === undefined) {
-          throw new TypeError(' this is null or not defined');
-        }
+            if (this === null || this === undefined) {
+                throw new TypeError(' this is null or not defined');
+            }
 
-        // 1. Let O be the result of calling ToObject passing the |this| value as the
-        // argument.
-        const O = Object(this);
+            // 1. Let O be the result of calling ToObject passing the |this| value as the
+            // argument.
+            const O = Object(this);
 
-        // 2. Let lenValue be the result of calling the Get internal method of O with the
-        // argument "length".
-        // 3. Let len be ToUint32(lenValue).
-        const len = O.length >>> 0;
+            // 2. Let lenValue be the result of calling the Get internal method of O with the
+            // argument "length".
+            // 3. Let len be ToUint32(lenValue).
+            const len = O.length >>> 0;
 
-        // 4. If IsCallable(callback) is false, throw a TypeError exception.
-        // See: http://es5.github.com/#x9.11
-        if (typeof callback !== "function") {
-          throw new TypeError(callback + ' is not a function');
-        }
+            // 4. If IsCallable(callback) is false, throw a TypeError exception.
+            // See: http://es5.github.com/#x9.11
+            if (typeof callback !== "function") {
+                throw new TypeError(callback + ' is not a function');
+            }
 
-        // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
-        if (arguments.length > 1) {
-          T = thisArg;
-        }
+            // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
+            if (arguments.length > 1) {
+                T = thisArg;
+            }
 
-        // 6. Let k be 0
-        k = 0;
+            // 6. Let k be 0
+            k = 0;
 
-        // 7. Repeat, while k < len
-        while (k < len) {
-          let kValue;
+            // 7. Repeat, while k < len
+            while (k < len) {
+                let kValue;
 
-          // a. Let Pk be ToString(k).
-          //   This is implicit for LHS operands of the in operator
-          // b. Let kPresent be the result of calling the HasProperty internal
-          //    method of O with
-          //    argument Pk.
-          //   This step can be combined with c
-          // c. If kPresent is true, then
-          if (k in O) {
-            // i. Let kValue be the result of calling the Get internal method of O with
-            // argument Pk
-            kValue = O[k];
+                // a. Let Pk be ToString(k).
+                //   This is implicit for LHS operands of the in operator
+                // b. Let kPresent be the result of calling the HasProperty internal
+                //    method of O with
+                //    argument Pk.
+                //   This step can be combined with c
+                // c. If kPresent is true, then
+                if (k in O) {
+                    // i. Let kValue be the result of calling the Get internal method of O with
+                    // argument Pk
+                    kValue = O[k];
 
-            // ii. Call the Call internal method of callback with T as the this value and
-            // argument list containing kValue, k, and O.
-            callback.call(T, kValue, k, O);
-          }
-          // d. Increase k by 1.
-          k++;
-        }
+                    // ii. Call the Call internal method of callback with T as the this value and
+                    // argument list containing kValue, k, and O.
+                    callback.call(T, kValue, k, O);
+                }
+                // d. Increase k by 1.
+                k++;
+            }
         // 8. return undefined
-      };
+        };
     }
 }
 
@@ -667,6 +671,7 @@ export function removeHiddenChars(str: string): string {
 // LTR/RTL and other directional formatting marks U+202A - U+202F
 // Combining characters U+0300 - U+036F
 // Zero width no-break space (BOM) U+FEFF
+// eslint-disable-next-line no-misleading-character-class
 const removeHiddenCharsRegex = /[\u2000-\u200F\u202A-\u202F\u0300-\u036f\uFEFF\s]/g;
 
 export function escapeRegExp(string: string): string {
@@ -725,9 +730,9 @@ export function defer() {
 }
 
 export async function promiseMapSeries<T>(
-        promises: Promise<T>[],
-        fn: (t: T) => void
-    ): Promise<void> {
+    promises: Promise<T>[],
+    fn: (t: T) => void,
+): Promise<void> {
     for (const o of await promises) {
         await fn(await o);
     }

src/webrtc/call.js

@@ -176,7 +176,7 @@ MatrixCall.prototype.placeScreenSharingCall =
         debuglog("Got screen stream, requesting audio stream...");
         const audioConstraints = _getUserMediaVideoContraints('voice');
         _placeCallWithConstraints(self, audioConstraints);
-    } catch(err) {
+    } catch (err) {
         self.emit("error",
             callError(
                 MatrixCall.ERR_NO_USER_MEDIA,