Closes: #1

Course3/Lab4/validations.py

@@ -1,24 +1,66 @@
 #!/usr/bin/env python3
-
 import re
 
-def validate_user(username, minlen):
+
+
+
+
+pattern = r"^[\-\._\s@#!?/\\:]"   # ^ = inicio, [ ] = conjunto prohibido
+
+
+
+def validate_user(username, minlen, pattern=None):
+
     """Checks if the received username matches the required conditions."""
+
     if type(username) != str:
+
         raise TypeError("username must be a string")
+
     if minlen < 1:
+
         raise ValueError("minlen must be at least 1")
+
 
+
     # Usernames can't be shorter than minlen
+
     if len(username) < minlen:
+
         return False
+
     # Usernames can only use letters, numbers, dots and underscores
+
     if not re.match('^[a-z0-9._]*$', username):
+
         return False
+
+    # Username can´t start wtih, especial characters.
+
+    if pattern:
+
+        if re.match(pattern, username):
+
+            return False
+
     # Usernames can't begin with a number
+
     if username[0].isnumeric():
+
         return False
+
     return True
 
 
 
+pattern = r"^[\-\._\s@#!?/\\:]"   # ^ = inicio, [ ] = conjunto prohibido
+
+
+
+print(validate_user("blue.kale", 3)) # True
+
+print(validate_user(".blue.kale", 3,pattern)) # Currently True, should be False
+
+print(validate_user("red_quinoa", 4,)) # True
+
+print(validate_user("_red_quinoa", 4, pattern)) # Currently True, should be False