Create utils/validators.py

app/utils/validators.py

@@ -0,0 +1,33 @@
+import re
+from flask import request, jsonify
+
+def validate_email(email):
+    """Validate an email address."""
+    regex = r"^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$"
+    return re.match(regex, email) is not None
+
+def validate_password(password):
+    """Validate a password (at least 8 characters, one uppercase, one number)."""
+    if len(password) < 8:
+        return False
+    if not re.search(r"[A-Z]", password):
+        return False
+    if not re.search(r"\d", password):
+        return False
+    return True
+
+def validate_ad_content(content):
+    """Validate ad content (non-empty and within length limits)."""
+    if not content or len(content) > 1000:
+        return False
+    return True
+
+def validate_request_json(required_fields):
+    """Validate JSON request payload for required fields."""
+    data = request.get_json()
+    if not data:
+        return jsonify({"error": "Request must be JSON"}), 400
+    for field in required_fields:
+        if field not in data:
+            return jsonify({"error": f"Missing required field: {field}"}), 400
+    return None