fix(user_scan/): chess_com module to use re for username pre-check

Author: kaifcodec

user_scanner/user_scan/gaming/chess_com.py

@@ -1,14 +1,27 @@
+import re
 from user_scanner.core.orchestrator import generic_validate
 from user_scanner.core.result import Result
 from user_scanner.core.helpers import get_random_user_agent
 
 
-def validate_chess_com(user):
+def validate_chess_com(user: str) -> Result:
+    # Length must be between 3 and 25 characters
+    if not (3 <= len(user) <= 25):
+        return Result.error("Length must be 3-25 characters")
+
+    # Only letters, numbers, underscores, and dashes allowed
+    if not re.match(r'^[a-zA-Z0-9_-]+$', user):
+        return Result.error("Usernames can only contain letters, numbers, underscores, and hyphens")
+
+    # Must start and end with an alphanumeric character
+    if not (user[0].isalnum() and user[-1].isalnum()):
+        return Result.error("Username must start and end with a letter or number")
+
     url = f"https://www.chess.com/callback/user/valid?username={user}"
     show_url = "https://chess.com"
 
     headers = {
-        'User-Agent':get_random_user_agent(),
+        'User-Agent': get_random_user_agent(),
         'Accept': "application/json, text/plain, */*",
         'Accept-Encoding': "identity",
         'Accept-Language': "en-US,en;q=0.9",
@@ -37,4 +50,4 @@ def process(response):
     elif result == 0:
         print("Unavailable!")
     else:
-        print("Error occurred!")
+        print(f"Error occurred! Reason: {result.get_reason()}")

user_scanner/user_scan/gaming/osu.py

@@ -17,4 +17,4 @@ def validate_osu(user):
     elif result == 0:
         print("Unavailable!")
     else:
-        print("Error occurred!")
+        print("Error occurred!")