Initial commit: KOC LOOP platform

lib/publish-url.ts

@@ -0,0 +1,27 @@
+export function safeHttpUrl(input: string) {
+  try {
+    const url = new URL(input);
+    if (!["http:", "https:"].includes(url.protocol)) return null;
+    return url;
+  } catch {
+    return null;
+  }
+}
+
+export function extractXhsPublishUrl(input: string) {
+  const candidates =
+    input.match(/https?:\/\/[^\s<>"'，。！？；：、【】（）]+/gi) ?? [];
+  for (const candidate of candidates) {
+    const cleaned = candidate.replace(/[.,!?;:~)\]}]+$/g, "");
+    const url = safeHttpUrl(cleaned);
+    if (!url) continue;
+    const hostname = url.hostname.toLowerCase();
+    const isXhs =
+      hostname === "xiaohongshu.com" ||
+      hostname.endsWith(".xiaohongshu.com") ||
+      hostname === "xhslink.cn" ||
+      hostname.endsWith(".xhslink.cn");
+    if (isXhs) return url.toString();
+  }
+  return "";
+}