From 353e7b8849fa6d76927c695f2bc085e0b44e22f2 Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Fri, 25 Oct 2024 07:27:27 +0300
Subject: vnext: fix message formatting for Telegram

---
 vnext/server/common/MessageUtils.js |  5 +++--
 vnext/server/durov.js               |  2 +-
 vnext/src/utils/embed.js            | 22 +++++++++++++++-------
 3 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/vnext/server/common/MessageUtils.js b/vnext/server/common/MessageUtils.js
index bb3d791f..d3c6a0f5 100644
--- a/vnext/server/common/MessageUtils.js
+++ b/vnext/server/common/MessageUtils.js
@@ -39,11 +39,12 @@ export function formatTitle(msg) {
 /**
  * format notification quote
  * @param { import('../../src/api').Message } msg message
+ * @param { boolean } isDurov format to Telegram markup
  * @returns {string} formatted quote line
  */
-export function formatQuote(msg) {
+export function formatQuote(msg, isDurov = false) {
     if (isReply(msg)) {
-        return msg.replyQuote || ''
+        return msg.replyQuote ? isDurov ? `<blockquote>${msg.replyQuote.substring(1)}</blockquote>` : msg.replyQuote : ''
     } else if (isPM(msg)) {
         return ''
     }
diff --git a/vnext/server/durov.js b/vnext/server/durov.js
index 6ab1831f..51996b9e 100644
--- a/vnext/server/durov.js
+++ b/vnext/server/durov.js
@@ -41,7 +41,7 @@ export const sendTelegramNotification = (msg, subscribers) => {
     log(`Telegram event: ${JSON.stringify(msg)}, ${subscribers} ${subscribers.length}`)
     if (!msg.service) {
         if (subscribers && subscribers.includes(demouser)) {
-            const message = `${formatTitle(msg)}\n${formatQuote(msg)}\n${format(msg.body, msg.uid, false)}`
+            const message = `${formatTitle(msg)}\n${formatQuote(msg, true)}\n${format(msg.body, msg.uid, false, true)}`
             log(message)
             sender.sendMessage(demouser, message, {
                 parse_mode: 'HTML',
diff --git a/vnext/src/utils/embed.js b/vnext/src/utils/embed.js
index 6a5c9c95..b6bbde14 100644
--- a/vnext/src/utils/embed.js
+++ b/vnext/src/utils/embed.js
@@ -122,27 +122,35 @@ function messageReplyReplace(messageId) {
  * @param {string} txt text message
  * @param {string} messageId current message id
  * @param {boolean} isCode set when message contains *code tag
+ * @param {boolean} isDurov skip rules non-compatible with Telegram
  * @returns {string} formatted message
  */
-function juickFormat(txt, messageId, isCode) {
+function juickFormat(txt, messageId, isCode, isDurov) {
   const urlRe = /(?:\[([^\][]+)\](?:\[([^\]]+)\]|\(((?:[a-z]+:\/\/|www\.|ftp\.)(?:\([-\S+*&@#/%=~|$?!:;,.]*\)|[-\S+*&@#/%=~|$?!:;,.])*(?:\([-\S+*&@#/%=~|$?!:;,.]*\)|[\S+*&@#/%=~|$]))\))|\b(?:[a-z]+:\/\/|www\.|ftp\.)(?:\([-\S+*&@#/%=~|$?!:;,.]*\)|[-\S+*&@#/%=~|$?!:;,.])*(?:\([-\S+*&@#/%=~|$?!:;,.]*\)|[\S+*&@#/%=~|$]))/gi
   const bqReplace = m => m.replace(/^(?:>|&gt;)\s?/gmi, '')
-  return (isCode)
-    ? formatText(txt, [
+  if (isCode) {
+    return formatText(txt, [
       { pr: 1, re: urlRe, with: urlReplaceInCode },
       { pr: 1, re: /\B(?:#(\d+))?(?:\/(\d+))?\b/g, with: messageReplyReplace(messageId) },
       { pr: 1, re: /\B@([\w-]+)\b/gi, with: '<a href="/$1">@$1</a>' },
     ])
-    : formatText(txt, [
-      { pr: 0, re: /((?:^(?:>|&gt;)\s?[\s\S]+?$\n?)+)/gmi, brackets: true, with: ['<q>', '</q>', bqReplace] },
+  } else {
+    const rules = [
+      { pr: 0, re: /((?:^(?:>|&gt;)\s?[\s\S]+?$\n?)+)/gmi, brackets: true, with: ['<blockquote>', '</blockquote>', bqReplace] },
       { pr: 1, re: urlRe, with: urlReplace },
       { pr: 1, re: /\B(?:#(\d+))?(?:\/(\d+))?\b/g, with: messageReplyReplace(messageId) },
       { pr: 1, re: /\B@([\w-]+)\b/gi, with: '<a href="/$1">@$1</a>' },
       { pr: 2, re: /\B\*([^\n]+?)\*((?=\s)|(?=$)|(?=[!"#$%&'*+,\-./:;<=>?@[\]^_`{|}~()]+))/g, brackets: true, with: ['<b>', '</b>'] },
       { pr: 2, re: /\B\/([^\n]+?)\/((?=\s)|(?=$)|(?=[!"#$%&'*+,\-./:;<=>?@[\]^_`{|}~()]+))/g, brackets: true, with: ['<i>', '</i>'] },
       { pr: 2, re: /\b_([^\n]+?)_((?=\s)|(?=$)|(?=[!"#$%&'*+,\-./:;<=>?@[\]^_`{|}~()]+))/g, brackets: true, with: ['<u>', '</u>'] },
-      { pr: 3, re: /\n/g, with: '<br/>' },
-    ])
+    ]
+    if (!isDurov) {
+      rules.push(
+        { pr: 3, re: /\n/g, with: '<br/>' }
+      )
+    }
+    return formatText(txt, rules)
+  }
 }
 /**
  * @external RegExpExecArray
-- 
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