Update monthly changelog generator

scripts/generate-monthly-changelog.ts

@@ -34,10 +34,22 @@ async function main() {
   }
 
   const summaries: string[] = []
+  const prsWithImages: { repo: string; number: number; image: string }[] = []
   for (const file of files) {
     const prs = JSON.parse(fs.readFileSync(path.join(prDir, file), "utf8"))
     for (const pr of prs) {
       summaries.push(`- ${pr.repo} #${pr.number}: ${pr.title}`)
+
+      const body: string = pr.body || ""
+      const afterIndex = body.toLowerCase().indexOf("after")
+      const searchText = afterIndex >= 0 ? body.slice(afterIndex) : body
+      const imageRegex =
+        /!\[[^\]]*?\]\((https?:\/\/[^)]+)\)|(https?:\/\/\S+?\.(?:png|jpg|jpeg|gif|svg))/i
+      const match = searchText.match(imageRegex) || body.match(imageRegex)
+      const image = match?.[1] || match?.[2]
+      if (image) {
+        prsWithImages.push({ repo: pr.repo, number: pr.number, image })
+      }
     }
   }
 
@@ -57,10 +69,26 @@ async function main() {
     outDir,
     `${year}-${month.toString().padStart(2, "0")}.md`,
   )
-  fs.writeFileSync(
-    filePath,
-    `# Changelog ${year}-${month.toString().padStart(2, "0")}\n\n${object.changelog}\n`,
-  )
+  let changelog = `# Changelog ${year}-${month.toString().padStart(2, "0")}\n\n${object.changelog}\n`
+
+  const escapeRegExp = (s: string) => s.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")
+  for (const pr of prsWithImages) {
+    const slug = `${pr.repo.replace(/\//g, "-")}-${pr.number}`
+    const linkRegex = new RegExp(
+      `(https://github.com/${escapeRegExp(pr.repo)}/pull/${pr.number}\))`,
+    )
+    changelog = changelog.replace(linkRegex, `$1 [(image)](#${slug})`)
+  }
+
+  if (prsWithImages.length > 0) {
+    changelog += "\n## PR Images\n\n"
+    for (const pr of prsWithImages) {
+      const slug = `${pr.repo.replace(/\//g, "-")}-${pr.number}`
+      changelog += `### ${slug}\n\n![image](${pr.image})\n\n`
+    }
+  }
+
+  fs.writeFileSync(filePath, changelog)
   console.log(`Updated ${filePath}`)
 }