From c76f408d19c8b0d7929c1a66823c447c392e08cd Mon Sep 17 00:00:00 2001
From: Tasso Evangelista <tasso.evangelista@rocket.chat>
Date: Mon, 28 Jan 2019 14:01:21 -0200
Subject: [PATCH] Make autolinker avoid message tokens

---
 .../rocketchat-autolinker/client/client.js    | 106 ++++++++----------
 1 file changed, 49 insertions(+), 57 deletions(-)

diff --git a/packages/rocketchat-autolinker/client/client.js b/packages/rocketchat-autolinker/client/client.js
index 2afe8f89f7c00..d76baeff2195b 100644
--- a/packages/rocketchat-autolinker/client/client.js
+++ b/packages/rocketchat-autolinker/client/client.js
@@ -1,75 +1,67 @@
 import { Meteor } from 'meteor/meteor';
 import s from 'underscore.string';
 import { RocketChat } from 'meteor/rocketchat:lib';
+import Autolinker from 'autolinker';
 
-//
-// AutoLinker is a named function that will replace links on messages
-// @param {Object} message - The message object
-//
+const createAutolinker = () => {
+	const regUrls = new RegExp(RocketChat.settings.get('AutoLinker_UrlsRegExp'));
 
-import Autolinker from 'autolinker';
+	const replaceAutolinkerMatch = (match) => {
+		if (match.getType() !== 'url') {
+			return null;
+		}
 
-function AutoLinker(message) {
-	if (RocketChat.settings.get('AutoLinker') !== true) {
-		return message;
-	}
+		if (!regUrls.test(match.matchedText)) {
+			return null;
+		}
 
-	if (s.trim(message.html)) {
-		const regUrls = new RegExp(RocketChat.settings.get('AutoLinker_UrlsRegExp'));
+		if (match.matchedText.indexOf(Meteor.absoluteUrl()) === 0) {
+			const tag = match.buildTag();
+			tag.setAttr('target', '');
+			return tag;
+		}
 
-		const autolinker = new Autolinker({
-			stripPrefix: RocketChat.settings.get('AutoLinker_StripPrefix'),
-			urls: {
-				schemeMatches: RocketChat.settings.get('AutoLinker_Urls_Scheme'),
-				wwwMatches: RocketChat.settings.get('AutoLinker_Urls_www'),
-				tldMatches: RocketChat.settings.get('AutoLinker_Urls_TLD'),
-			},
-			email: RocketChat.settings.get('AutoLinker_Email'),
-			phone: RocketChat.settings.get('AutoLinker_Phone'),
-			twitter: false,
-			stripTrailingSlash: false,
-			replaceFn(match) {
-				if (match.getType() === 'url') {
-					if (regUrls.test(match.matchedText)) {
-						if (match.matchedText.indexOf(Meteor.absoluteUrl()) === 0) {
-							// returns an `Autolinker.HtmlTag` instance for an <a> tag
-							const tag = match.buildTag();
-							// sets target to empty, instead of _blank
-							tag.setAttr('target', '');
-							return tag;
-						}
+		return true;
+	};
 
-						return true;
-					}
-				}
+	return new Autolinker({
+		stripPrefix: RocketChat.settings.get('AutoLinker_StripPrefix'),
+		urls: {
+			schemeMatches: RocketChat.settings.get('AutoLinker_Urls_Scheme'),
+			wwwMatches: RocketChat.settings.get('AutoLinker_Urls_www'),
+			tldMatches: RocketChat.settings.get('AutoLinker_Urls_TLD'),
+		},
+		email: RocketChat.settings.get('AutoLinker_Email'),
+		phone: RocketChat.settings.get('AutoLinker_Phone'),
+		twitter: false,
+		stripTrailingSlash: false,
+		replaceFn: replaceAutolinkerMatch,
+	});
+};
 
-				return null;
-			},
-		});
+const renderMessage = (message) => {
+	if (RocketChat.settings.get('AutoLinker') !== true) {
+		return message;
+	}
 
-		let regNonAutoLink = /(```\w*[\n ]?[\s\S]*?```+?)|(`(?:[^`]+)`)/;
-		if (RocketChat.settings.get('Katex_Enabled')) {
-			regNonAutoLink = /(```\w*[\n ]?[\s\S]*?```+?)|(`(?:[^`]+)`)|(\\\(\w*[\n ]?[\s\S]*?\\\)+?)/;
-		}
+	if (!s.trim(message.html)) {
+		return message;
+	}
 
-		// Separate text in code blocks and non code blocks
-		const msgParts = message.html.split(regNonAutoLink);
+	const regexTokens = new RegExp(`(${ (message.tokens || []).map(({ token }) => RegExp.escape(token)) })`, 'g');
 
-		msgParts.forEach((part, index) => {
-			if (part && part.length > 0) {
-				// Verify if this part is code
-				const codeMatch = part.match(regNonAutoLink);
-				if (!codeMatch) {
-					msgParts[index] = autolinker.link(part);
-				}
+	const autolinker = createAutolinker();
+	message.html = message.html.split(regexTokens)
+		.map((msgPart) => {
+			if (regexTokens.test(msgPart)) {
+				return msgPart;
 			}
-		});
 
-		// Re-mount message
-		message.html = msgParts.join('');
-	}
+			return autolinker.link(msgPart);
+		})
+		.join('');
 
 	return message;
-}
+};
 
-RocketChat.callbacks.add('renderMessage', AutoLinker, RocketChat.callbacks.priority.LOW, 'autolinker');
+RocketChat.callbacks.add('renderMessage', renderMessage, RocketChat.callbacks.priority.LOW, 'autolinker');