Add ESLint rule one-var

.eslintrc

@@ -48,6 +48,7 @@
 			"vars": "all",
 			"args": "after-used"
 		}],
+		"one-var": [2, "never"],
 		"no-lonely-if": 2,
 		"no-trailing-spaces": 2,
 		"complexity": [1, 31],

client/startup/userSetUtcOffset.js

@@ -2,10 +2,9 @@ import moment from 'moment';
 
 Meteor.startup(function() {
 	Tracker.autorun(function() {
-		var user, utcOffset;
-		user = Meteor.user();
+		const user = Meteor.user();
 		if (user && user.statusConnection === 'online') {
-			utcOffset = moment().utcOffset() / 60;
+			const utcOffset = moment().utcOffset() / 60;
 			if (user.utcOffset !== utcOffset) {
 				Meteor.call('userSetUtcOffset', utcOffset);
 			}

lib/fileUpload.js

@@ -45,7 +45,8 @@ if (UploadFS) {
 
 			onRead(fileId, file, req, res) {
 				if (RocketChat.settings.get('FileUpload_ProtectFiles')) {
-					let uid, token;
+					let uid;
+					let token;
 
 					if (req && req.headers && req.headers.cookie) {
 						const rawCookies = req.headers.cookie;

packages/rocketchat-file-upload/server/config/configFileUploadAmazonS3.js

@@ -1,7 +1,9 @@
 /* globals Slingshot, FileUpload, AWS, SystemLogger */
 const crypto = Npm.require('crypto');
 
-let S3accessKey, S3secretKey, S3expiryTimeSpan;
+let S3accessKey;
+let S3secretKey;
+let S3expiryTimeSpan;
 
 const generateURL = function(file) {
 	if (!file || !file.s3) {

packages/rocketchat-file-upload/server/config/configFileUploadGridFS.js

@@ -25,7 +25,9 @@ ExtractRange.prototype._transform = function(chunk, enc, cb) {
 	} else if (this.bytes_read + chunk.length < this.start) {
 		// this chunk is still before the start byte
 	} else {
-		let start, stop;
+		let start;
+		let stop;
+
 		if (this.start <= this.bytes_read) {
 			start = 0;
 		} else {

packages/rocketchat-file-upload/server/lib/requests.js

@@ -15,10 +15,12 @@ WebApp.connectHandlers.use('/file-upload/', function(req, res, next) {
 
 		if (file) {
 			if (!Meteor.settings.public.sandstorm && protectedFiles) {
-				let rawCookies, ref, token, uid;
+				let rawCookies;
+				let token;
+				let uid;
 				const cookie = new Cookies();
 
-				if ((typeof req !== 'undefined' && req !== null ? (ref = req.headers) != null ? ref.cookie : void 0 : void 0) != null) {
+				if (req.headers && req.headers.cookie != null) {
 					rawCookies = req.headers.cookie;
 				}
 

packages/rocketchat-file-upload/server/methods/getS3FileUrl.js

@@ -1,5 +1,8 @@
 const crypto = Npm.require('crypto');
-let protectedFiles, S3accessKey, S3secretKey, S3expiryTimeSpan;
+let protectedFiles;
+let S3accessKey;
+let S3secretKey;
+let S3expiryTimeSpan;
 
 RocketChat.settings.get('FileUpload_ProtectFiles', function(key, value) {
 	protectedFiles = value;

packages/rocketchat-integrations/client/views/integrationsOutgoing.js

@@ -285,7 +285,8 @@ Template.integrationsOutgoing.events({
 			return toastr.error(TAPi18n.__('You_should_inform_one_url_at_least'));
 		}
 
-		let triggerWords, triggerWordAnywhere;
+		let triggerWords;
+		let triggerWordAnywhere;
 		if (RocketChat.integrations.outgoingEvents[event].use.triggerWords) {
 			triggerWords = $('[name=triggerWords]').val().trim();
 			triggerWords = triggerWords.split(',').filter((word) => word.trim() !== '');
@@ -311,10 +312,11 @@ Template.integrationsOutgoing.events({
 			}
 		}
 
-		let retryCount, retryDelay;
+		let retryCount;
+		let retryDelay;
 		if (retryFailedCalls === '1') {
 			retryCount = parseInt($('[name=retryCount]').val().trim());
-			retryDelay: $('[name=retryDelay]').val().trim();
+			retryDelay = $('[name=retryDelay]').val().trim();
 		}
 
 		const integration = {

packages/rocketchat-lib/lib/fileUploadRestrictions.js

@@ -10,13 +10,12 @@ RocketChat.fileUploadMediaWhiteList = function() {
 };
 
 RocketChat.fileUploadIsValidContentType = function(type) {
-	var list, wildCardGlob, wildcards;
-	list = RocketChat.fileUploadMediaWhiteList();
+	const list = RocketChat.fileUploadMediaWhiteList();
 	if (!list || _.contains(list, type)) {
 		return true;
 	} else {
-		wildCardGlob = '/*';
-		wildcards = _.filter(list, function(item) {
+		const wildCardGlob = '/*';
+		const wildcards = _.filter(list, function(item) {
 			return item.indexOf(wildCardGlob) > 0;
 		});
 		if (_.contains(wildcards, type.replace(/(\/.*)$/, wildCardGlob))) {

packages/rocketchat-lib/server/functions/saveUser.js

@@ -87,7 +87,8 @@ RocketChat.saveUser = function(userId, userData) {
 			const header = RocketChat.placeholders.replace(RocketChat.settings.get('Email_Header') || '');
 			const footer = RocketChat.placeholders.replace(RocketChat.settings.get('Email_Footer') || '');
 
-			let subject, html;
+			let subject;
+			let html;
 
 			if (RocketChat.settings.get('Accounts_UserAddedEmail_Customized')) {
 				subject = RocketChat.settings.get('Accounts_UserAddedEmailSubject');

packages/rocketchat-lib/server/functions/setUserAvatar.js

@@ -1,5 +1,6 @@
 RocketChat.setUserAvatar = function(user, dataURI, contentType, service) {
-	let encoding, image;
+	let encoding;
+	let image;
 
 	if (service === 'initials') {
 		return RocketChat.models.Users.setAvatarOrigin(user._id, service);

packages/rocketchat-lib/server/lib/PushNotification.js

@@ -6,8 +6,8 @@ class PushNotification {
 	}
 
 	hash(str) {
-		let hash = 0,
-			i = str.length;
+		let hash = 0;
+		let i = str.length;
 
 		while (i) {
 			hash = ((hash << 5) - hash) + str.charCodeAt(--i);

packages/rocketchat-lib/server/lib/notifyUsersOnMessage.js

@@ -43,12 +43,10 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		// Update the other subscriptions
 		RocketChat.models.Subscriptions.incUnreadOfDirectForRoomIdExcludingUserId(message.rid, message.u._id, 1);
 	} else {
-		var mentionIds, toAll, highlightsIds, highlights;
-
-		mentionIds = [];
-		highlightsIds = [];
-		toAll = false;
-		highlights = RocketChat.models.Users.findUsersByUsernamesWithHighlights(room.usernames, { fields: { '_id': 1, 'settings.preferences.highlights': 1 }}).fetch();
+		let toAll = false;
+		const mentionIds = [];
+		const highlightsIds = [];
+		const highlights = RocketChat.models.Users.findUsersByUsernamesWithHighlights(room.usernames, { fields: { '_id': 1, 'settings.preferences.highlights': 1 }}).fetch();
 
 		if (message.mentions != null) {
 			message.mentions.forEach(function(mention) {

packages/rocketchat-lib/server/lib/sendEmailOnMessage.js

@@ -10,8 +10,9 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		return message;
 	}
 
-	var emailSubject, usersToSendEmail = {};
-	var directMessage = room.t === 'd';
+	let emailSubject;
+	const usersToSendEmail = {};
+	const directMessage = room.t === 'd';
 
 	if (directMessage) {
 		usersToSendEmail[message.rid.replace(message.u._id, '')] = 1;

packages/rocketchat-lib/server/lib/sendNotificationsOnMessage.js

@@ -16,16 +16,7 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 	/*
 	Increment unread couter if direct messages
 	 */
-	var indexOf = [].indexOf || function(item) {
-		for (var i = 0, l = this.length; i < l; i++) {
-			if (i in this && this[i] === item) {
-				return i;
-			}
-		}
-		return -1;
-	};
-
-	var settings, desktopMentionIds, i, j, len, len1, highlights, mentionIds, highlightsIds, usersWithHighlights, mobileMentionIds, ref, ref1, toAll, toHere, userIdsToNotify, userIdsToPushNotify, userOfMention, userOfMentionId, usersOfDesktopMentions, usersOfMentionId, usersOfMentionItem, usersOfMobileMentions;
+	const settings = {};
 
 	/**
 	 * Checks if a given user can be notified
@@ -67,8 +58,6 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		return has;
 	}
 
-	settings = {};
-
 	settings.alwaysNotifyDesktopUsers = [];
 	settings.dontNotifyDesktopUsers = [];
 	settings.alwaysNotifyMobileUsers = [];
@@ -90,11 +79,11 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		settings.desktopNotificationDurations[subscription.u._id] = subscription.desktopNotificationDuration;
 	});
 
-	userIdsToNotify = [];
-	userIdsToPushNotify = [];
-	usersWithHighlights = [];
+	let userIdsToNotify = [];
+	let userIdsToPushNotify = [];
+	const usersWithHighlights = [];
 
-	highlights = RocketChat.models.Users.findUsersByUsernamesWithHighlights(room.usernames, { fields: { '_id': 1, 'settings.preferences.highlights': 1 }}).fetch();
+	const highlights = RocketChat.models.Users.findUsersByUsernamesWithHighlights(room.usernames, { fields: { '_id': 1, 'settings.preferences.highlights': 1 }}).fetch();
 
 	highlights.forEach(function(user) {
 		if (messageContainsHighlight(message, user.settings.preferences.highlights)) {
@@ -120,9 +109,9 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		push_room = '';
 	}
 
-	if ((room.t == null) || room.t === 'd') {
-		userOfMentionId = message.rid.replace(message.u._id, '');
-		userOfMention = RocketChat.models.Users.findOne({
+	if (room.t == null || room.t === 'd') {
+		const userOfMentionId = message.rid.replace(message.u._id, '');
+		const userOfMention = RocketChat.models.Users.findOne({
 			_id: userOfMentionId
 		}, {
 			fields: {
@@ -174,19 +163,19 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		}
 
 	} else {
-		mentionIds = [];
-		if ((ref = message.mentions) != null) {
-			ref.forEach(function(mention) {
+		const mentionIds = [];
+		if (message.mentions != null) {
+			message.mentions.forEach(function(mention) {
 				return mentionIds.push(mention._id);
 			});
 		}
-		toAll = mentionIds.indexOf('all') > -1;
-		toHere = mentionIds.indexOf('here') > -1;
+		const toAll = mentionIds.indexOf('all') > -1;
+		const toHere = mentionIds.indexOf('here') > -1;
 		if (mentionIds.length > 0 || settings.alwaysNotifyDesktopUsers.length > 0) {
-			desktopMentionIds = _.union(mentionIds, settings.alwaysNotifyDesktopUsers);
+			let desktopMentionIds = _.union(mentionIds, settings.alwaysNotifyDesktopUsers);
 			desktopMentionIds = _.difference(desktopMentionIds, settings.dontNotifyDesktopUsers);
 
-			usersOfDesktopMentions = RocketChat.models.Users.find({
+			let usersOfDesktopMentions = RocketChat.models.Users.find({
 				_id: {
 					$in: desktopMentionIds
 				}
@@ -205,8 +194,7 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 						});
 					}
 				};
-				for (i = 0, len = usersOfDesktopMentions.length; i < len; i++) {
-					usersOfMentionItem = usersOfDesktopMentions[i];
+				for (const usersOfMentionItem of usersOfDesktopMentions) {
 					if (room.usernames.indexOf(usersOfMentionItem.username) === -1) {
 						callJoin(usersOfMentionItem);
 					}
@@ -223,10 +211,10 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		}
 
 		if (mentionIds.length > 0 || settings.alwaysNotifyMobileUsers.length > 0) {
-			mobileMentionIds = _.union(mentionIds, settings.alwaysNotifyMobileUsers);
+			let mobileMentionIds = _.union(mentionIds, settings.alwaysNotifyMobileUsers);
 			mobileMentionIds = _.difference(mobileMentionIds, settings.dontNotifyMobileUsers);
 
-			usersOfMobileMentions = RocketChat.models.Users.find({
+			let usersOfMobileMentions = RocketChat.models.Users.find({
 				_id: {
 					$in: mobileMentionIds
 				}
@@ -249,7 +237,7 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 			}), '_id');
 		}
 
-		if ((toAll || toHere) && ((ref1 = room.usernames) != null ? ref1.length : void 0) > 0) {
+		if ((toAll || toHere) && room.usernames && room.usernames.length > 0) {
 			RocketChat.models.Users.find({
 				username: {
 					$in: room.usernames
@@ -265,18 +253,17 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 					statusConnection: 1
 				}
 			}).forEach(function(user) {
-				var ref2, ref3, ref4;
-				if (((ref2 = user.status) === 'online' || ref2 === 'away' || ref2 === 'busy') && (ref3 = user._id, indexOf.call(settings.dontNotifyDesktopUsers, ref3) < 0)) {
+				if (['online', 'away', 'busy'].includes(user.status) && (settings.dontNotifyDesktopUsers || []).includes(user._id) === false) {
 					userIdsToNotify.push(user._id);
 				}
-				if (toAll && user.statusConnection !== 'online' && (ref4 = user._id, indexOf.call(settings.dontNotifyMobileUsers, ref4) < 0)) {
+				if (toAll && user.statusConnection !== 'online' && (settings.dontNotifyMobileUsers || []).includes(user._id) === false) {
 					return userIdsToPushNotify.push(user._id);
 				}
 			});
 		}
 
 		if (usersWithHighlights.length > 0) {
-			highlightsIds = _.pluck(usersWithHighlights, '_id');
+			const highlightsIds = _.pluck(usersWithHighlights, '_id');
 			userIdsToNotify = userIdsToNotify.concat(highlightsIds);
 			userIdsToPushNotify = userIdsToPushNotify.concat(highlightsIds);
 		}
@@ -285,8 +272,7 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		userIdsToPushNotify = _.without(_.compact(_.unique(userIdsToPushNotify)), message.u._id);
 
 		if (userIdsToNotify.length > 0) {
-			for (j = 0, len1 = userIdsToNotify.length; j < len1; j++) {
-				usersOfMentionId = userIdsToNotify[j];
+			for (const usersOfMentionId of userIdsToNotify) {
 				let title = '@' + user.username;
 				if (room.name) {
 					title += ' @ #' + room.name;

packages/rocketchat-lib/server/methods/updateMessage.js

@@ -25,9 +25,15 @@ Meteor.methods({
 
 		const blockEditInMinutes = RocketChat.settings.get('Message_AllowEditing_BlockEditInMinutes');
 		if (Match.test(blockEditInMinutes, Number) && blockEditInMinutes !== 0) {
-			let currentTsDiff, msgTs;
-			if (Match.test(originalMessage.ts, Number)) { msgTs = moment(originalMessage.ts); }
-			if (msgTs) { currentTsDiff = moment().diff(msgTs, 'minutes'); }
+			let currentTsDiff;
+			let msgTs;
+
+			if (Match.test(originalMessage.ts, Number)) {
+				msgTs = moment(originalMessage.ts);
+			}
+			if (msgTs) {
+				currentTsDiff = moment().diff(msgTs, 'minutes');
+			}
 			if (currentTsDiff > blockEditInMinutes) {
 				throw new Meteor.Error('error-message-editing-blocked', 'Message editing is blocked', { method: 'updateMessage' });
 			}

packages/rocketchat-livechat/app/client/views/messages.js

@@ -168,12 +168,12 @@ Template.messages.onRendered(function() {
 });
 
 Template.messages.onRendered(function() {
-	var messages, newMessage, onscroll, template;
-	messages = this.find('.messages');
-	newMessage = this.find('.new-message');
-	template = this;
+	const messages = this.find('.messages');
+	const newMessage = this.find('.new-message');
+	const template = this;
+
 	if (messages) {
-		onscroll = _.throttle(function() {
+		const onscroll = _.throttle(function() {
 			template.atBottom = messages.scrollTop >= messages.scrollHeight - messages.clientHeight;
 		}, 200);
 		Meteor.setInterval(function() {

packages/rocketchat-livechat/app/client/views/register.js

@@ -23,7 +23,6 @@ Template.register.helpers({
 
 Template.register.events({
 	'submit #livechat-registration'(e, instance) {
-		var $email, $name;
 		e.preventDefault();
 
 		const start = () => {
@@ -33,8 +32,8 @@ Template.register.events({
 			}
 		};
 
-		$name = instance.$('input[name=name]');
-		$email = instance.$('input[name=email]');
+		const $name = instance.$('input[name=name]');
+		const $email = instance.$('input[name=email]');
 		if (!($name.val().trim() && $email.val().trim())) {
 			return instance.showError(TAPi18n.__('Please_fill_name_and_email'));
 		} else {

packages/rocketchat-message-snippet/server/requests.js

@@ -1,9 +1,11 @@
 /* global Cookies */
 WebApp.connectHandlers.use('/snippet/download', function(req, res) {
-	var cookie, rawCookies, ref, token, uid;
-	cookie = new Cookies();
+	let rawCookies;
+	let token;
+	let uid;
+	const cookie = new Cookies();
 
-	if ((typeof req !== 'undefined' && req !== null ? (ref = req.headers) !== null ? ref.cookie : void 0 : void 0) !== null) {
+	if (req.headers && req.headers.cookie !== null) {
 		rawCookies = req.headers.cookie;
 	}