fix(email_scan): restore and update CodePen module

user_scanner/email_scan/dev/codepen.py

@@ -0,0 +1,43 @@
+import re
+
+from user_scanner.core.impersonate import impersonate_request_async
+from user_scanner.core.result import Result
+
+SIGNUP_URL = "https://codepen.io/accounts/signup/user/free"
+
+
+async def validate_codepen(email: str) -> Result:
+    show_url = "https://codepen.io"
+
+    try:
+        page = await impersonate_request_async(SIGNUP_URL)
+        token = re.search(r'<meta name="csrf-token" content="([^"]+)"', page.text)
+        if page.status_code != 200 or not token:
+            return Result.error(
+                f"Could not read CodePen signup form ({page.status_code})",
+                url=show_url,
+            )
+
+        response = await impersonate_request_async(
+            "https://codepen.io/accounts/duplicate_check",
+            "POST",
+            headers={"x-csrf-token": token.group(1)},
+            data={"attribute": "email", "value": email, "context": "user"},
+        )
+        if response.status_code != 200:
+            return Result.error(
+                f"Unexpected CodePen response: {response.status_code}", url=show_url
+            )
+
+        data = response.json()
+        if data.get("success") is not True:
+            return Result.error("Unexpected CodePen response", url=show_url)
+
+        errors = data.get("payload", {}).get("errors", {}).get("email")
+        if errors == ["That Email is already taken. Please choose another!"]:
+            return Result.taken(url=show_url)
+        if errors == []:
+            return Result.available(url=show_url)
+        return Result.error("Unexpected CodePen email result", url=show_url)
+    except Exception as exc:  # noqa: BLE001 - scanner modules must return errors
+        return Result.error(exc, url=show_url)