Merge `embed.js` from Next version

1 files changed, 50 insertions, 14 deletions

diff --git a/vnext/src/utils/embed.js b/vnext/src/utils/embed.js
index f7f55eb7..e1fc28dd 100644
--- a/vnext/src/utils/embed.js
+++ b/vnext/src/utils/embed.js
@@ -1,3 +1,9 @@
+function htmlEscape(html) {
+  return html.replace(/&/g, '&')
+            .replace(/"/g, '"')
+            .replace(/</g, '&lt;')
+            .replace(/>/g, '&gt;');
+}
 
 function insertAfter(newNode, referenceNode) {
   referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
@@ -13,12 +19,6 @@ function removeAllFrom(fromNode) {
   for (let c; c = fromNode.lastChild; ) { fromNode.removeChild(c); }
 }
 
-function htmlEscape(html) {
-  let textarea = document.createElement('textarea');
-  textarea.textContent = html;
-  return textarea.innerHTML;
-}
-
 // rules :: [{pr: number, re: RegExp, with: string}]
 // rules :: [{pr: number, re: RegExp, with: Function}]
 // rules :: [{pr: number, re: RegExp, brackets: true, with: [string, string]}]
@@ -89,7 +89,10 @@ function makeResizable(element, calcHeight) {
 
 function extractDomain(url) {
   const domainRe = /^(?:https?:\/\/)?(?:[^@\/\n]+@)?(?:www\.)?([^:\/\n]+)/i;
-  return domainRe.exec(url)[1];
+  let result = domainRe.exec(url) || [];
+  if (result.length > 0) {
+    return result[1];
+  }
 }
 
 function urlReplace(match, p1, p2, p3) {
@@ -120,7 +123,7 @@ function messageReplyReplace(messageId) {
  * @param {string} txt
  * @param {string} messageId - current message id
  * @param {boolean} isCode
- * @returns {string}
+ * @returns {string} formatted message
  */
 function juickFormat(txt, messageId, isCode) {
   const urlRe = /(?:\[([^\]\[]+)\](?:\[([^\]]+)\]|\(((?:[a-z]+:\/\/|www\.|ftp\.)(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[-\w+*&@#/%=~|$?!:;,.])*(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[\w+*&@#/%=~|$]))\))|\b(?:[a-z]+:\/\/|www\.|ftp\.)(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[-\w+*&@#/%=~|$?!:;,.])*(?:\([-\w+*&@#/%=~|$?!:;,.]*\)|[\w+*&@#/%=~|$]))/gi;
@@ -196,7 +199,7 @@ function getEmbeddableLinkTypes() {
       ctsDefault: false,
       re: /^(?:https?:)?\/\/(?:www\.|m\.|gaming\.)?(?:youtu(?:(?:\.be\/|be\.com\/(?:v|embed)\/)([-\w]+)|be\.com\/watch)((?:(?:\?|&(?:amp;)?)(?:\w+=[-\.\w]*[-\w]))*)|youtube\.com\/playlist\?list=([-\w]*)(&(amp;)?[-\w\?=]*)?)/i,
       makeNode: function(aNode, reResult, div) {
-        let [url, v, args, plist] = reResult;
+        let [v, args, plist] = reResult;
         let iframeUrl;
         if (plist) {
           iframeUrl = '//www.youtube-nocookie.com/embed/videoseries?list=' + plist;
@@ -212,7 +215,7 @@ function getEmbeddableLinkTypes() {
           };
           if (pp.t) {
             const tre = /^(?:(\d+)|(?:(\d+)h)?(?:(\d+)m)?(\d+)s|(?:(\d+)h)?(\d+)m|(\d+)h)$/i;
-            let [, t, h, m, s, h1, m1, h2] = tre.exec(pp.t);
+            let [, t, h, m, s, h1, m1, h2] = tre.exec(pp.t) || [];
             embedArgs['start'] = (+t) || ((+(h || h1 || h2 || 0))*60*60 + (+(m || m1 || 0))*60 + (+(s || 0)));
           }
           if (pp.list) {
@@ -248,14 +251,14 @@ function getEmbeddableLinkTypes() {
       ctsDefault: false,
       re: /^(?:https?:)?\/\/(?:www\.)?(?:mobile\.)?twitter\.com\/([\w-]+)\/status(?:es)?\/([\d]+)/i,
       makeNode: function(aNode, reResult, div) {
-        let [url, userId, postId] = reResult;
+        let [url] = reResult;
         url = url.replace('mobile.','');
 
         div.innerHTML = `<blockquote class="twitter-tweet" data-lang="en"><a href="${url}"></a></blockquote>`;
 
-        if (window.twttr) {
+        if (window['twttr']) {
           // https://developer.twitter.com/en/docs/twitter-for-websites/javascript-api/guides/scripting-loading-and-initialization
-          window.twttr.widgets.load(div);
+          window['twttr'].widgets.load(div);
         } else {
           // innerHTML cannot insert scripts, so...
           let script = document.createElement('script');
@@ -266,6 +269,24 @@ function getEmbeddableLinkTypes() {
 
         return div;
       }
+    },
+    {
+      name: 'Telegram posts',
+      id: 'embed_telegram_posts',
+      className: 'tg compact',
+      re: /https?:\/\/t\.me\/(\S+)/i,
+      makeNode: function(aNode, reResult, div) {
+        let [url, post] = reResult;
+        // innerHTML cannot insert scripts, so...
+        let script = document.createElement('script');
+        script.src = 'https://telegram.org/js/telegram-widget.js?18';
+        script.setAttribute('data-telegram-post', post);
+        script.setAttribute('data-tme-mode', 'data-tme-mode');
+        script.setAttribute('data-width', '100%');
+        script.charset = 'utf-8';
+        div.appendChild(script);
+        return div;
+      }
     }
   ];
 }
@@ -316,7 +337,6 @@ function embedLinks(aNodes, container) {
  * @param {string} allLinksSelector
  */
 export function embedLinksToX(x, beforeNodeSelector, allLinksSelector) {
-  let isCtsPost = false;
   let allLinks = x.querySelectorAll(allLinksSelector);
 
   let existingContainer = x.querySelector('div.embedContainer');
@@ -334,6 +354,9 @@ export function embedLinksToX(x, beforeNodeSelector, allLinksSelector) {
   }
 }
 
+/**
+ * Embed links to articles
+ */
 function embedLinksToArticles() {
   let beforeNodeSelector = 'nav.l';
   let allLinksSelector = 'p:not(.ir) a, pre a';
@@ -342,6 +365,9 @@ function embedLinksToArticles() {
   });
 }
 
+/**
+ * Embed links to post
+ */
 function embedLinksToPost() {
   let beforeNodeSelector = '.msg-txt + *';
   let allLinksSelector = '.msg-txt a';
@@ -350,6 +376,16 @@ function embedLinksToPost() {
   });
 }
 
+/**
+ * @external NodeListOf
+ */
+
+/**
+ * Embed URLs to container
+ * 
+ * @param {NodeListOf<Element>} urls 
+ * @param {HTMLDivElement} embedContainer 
+ */
 export function embedUrls(urls, embedContainer) {
   embedLinks(urls, embedContainer);
 }