From 4bee36ed4a09b026d9c1a836e4568da85b67718e Mon Sep 17 00:00:00 2001
From: Yanlong Wang <yanlong.wang@naiver.org>
Date: Thu, 9 May 2024 11:06:20 +0800
Subject: [PATCH] fix: patch tidyMarkdown

---
 backend/functions/src/utils/markdown.ts | 58 ++++++++++++-------------
 1 file changed, 28 insertions(+), 30 deletions(-)

diff --git a/backend/functions/src/utils/markdown.ts b/backend/functions/src/utils/markdown.ts
index f8def89..02638ff 100644
--- a/backend/functions/src/utils/markdown.ts
+++ b/backend/functions/src/utils/markdown.ts
@@ -1,39 +1,37 @@
-
 export function tidyMarkdown(markdown: string): string {
+    const lines = markdown.split('\n');
+    const processedLines = lines.map((line) => {
+        // Remove leading spaces from each line
+        line = line.trimStart();
 
-    // Step 1: Handle complex broken links with text and optional images spread across multiple lines
-    let normalizedMarkdown = markdown.replace(/\[\s*([^\]\n]+?)\s*\]\s*\(\s*([^)]+)\s*\)/g, (match, text, url) => {
-        // Remove internal new lines and excessive spaces within the text
-        text = text.replace(/\s+/g, ' ').trim();
-        url = url.replace(/\s+/g, '').trim();
-        return `[${text}](${url})`;
+        // Handle complex broken links with text and optional images
+        line = line.replace(/\[\s*([^\]\n!]*?)\s*(?:!\[([^\]]*)\]\((.*?)\))?\s*\]\s*\(\s*([^)\n]+)\s*\)/g, (match, text, alt, imgUrl, linkUrl) => {
+            text = text.replace(/\s+/g, ' ').trim();
+            alt = alt ? alt.replace(/\s+/g, ' ').trim() : '';
+            imgUrl = imgUrl ? imgUrl.replace(/\s+/g, '').trim() : '';
+            linkUrl = linkUrl.replace(/\s+/g, '').trim();
+            if (imgUrl) {
+                return `[${text} ![${alt}](${imgUrl})](${linkUrl})`;
+            } else {
+                return `[${text}](${linkUrl})`;
+            }
+        });
+
+        // Normalize regular links that may be broken across lines
+        line = line.replace(/\[\s*([^\]\n]+)\]\s*\(\s*([^)\n]+)\s*\)/g, (match, text, url) => {
+            text = text.replace(/\s+/g, ' ').trim();
+            url = url.replace(/\s+/g, '').trim();
+            return `[${text}](${url})`;
+        });
+
+        return line;
     });
 
-    normalizedMarkdown = normalizedMarkdown.replace(/\[\s*([^\]\n!]*?)\s*\n*(?:!\[([^\]]*)\]\((.*?)\))?\s*\n*\]\s*\(\s*([^)]+)\s*\)/g, (match, text, alt, imgUrl, linkUrl) => {
-        // Normalize by removing excessive spaces and new lines
-        text = text.replace(/\s+/g, ' ').trim();
-        alt = alt ? alt.replace(/\s+/g, ' ').trim() : '';
-        imgUrl = imgUrl ? imgUrl.replace(/\s+/g, '').trim() : '';
-        linkUrl = linkUrl.replace(/\s+/g, '').trim();
-        if (imgUrl) {
-            return `[${text} ![${alt}](${imgUrl})](${linkUrl})`;
-        } else {
-            return `[${text}](${linkUrl})`;
-        }
-    });
+    // Join the processed lines back together
+    let normalizedMarkdown = processedLines.join('\n');
 
-    // Step 2: Normalize regular links that may be broken across lines
-    normalizedMarkdown = normalizedMarkdown.replace(/\[\s*([^\]]+)\]\s*\(\s*([^)]+)\)/g, (match, text, url) => {
-        text = text.replace(/\s+/g, ' ').trim();
-        url = url.replace(/\s+/g, '').trim();
-        return `[${text}](${url})`;
-    });
-
-    // Step 3: Replace more than two consecutive empty lines with exactly two empty lines
+    // Replace more than two consecutive empty lines with exactly two empty lines
     normalizedMarkdown = normalizedMarkdown.replace(/\n{3,}/g, '\n\n');
 
-    // Step 4: Remove leading spaces from each line
-    normalizedMarkdown = normalizedMarkdown.replace(/^[ \t]+/gm, '');
-
     return normalizedMarkdown.trim();
 }