Move to TanStack Start from Next.js (#184)

web/app/lib/utils/url.ts

@@ -0,0 +1,25 @@
+export function isValidUrl(string: string): boolean {
+  try {
+    new URL(string)
+    return true
+  } catch (_) {
+    return false
+  }
+}
+
+export function isUrl(text: string): boolean {
+  const pattern: RegExp =
+    /^(https?:\/\/)?([\da-z.-]+)\.([a-z.]{2,6})([/\w .-]*)*\/?$/
+  return pattern.test(text)
+}
+
+export function ensureUrlProtocol(
+  url: string,
+  defaultProtocol: string = "https://",
+): string {
+  if (url.match(/^[a-zA-Z]+:\/\//)) {
+    return url
+  }
+
+  return `${defaultProtocol}${url.startsWith("//") ? url.slice(2) : url}`
+}