Rework invitation system and add qrcode

tools/utils.py

@@ -43,11 +43,24 @@ def valid_username(username):
     valid=True
     # Caractères non autorisés dans la RFC #822
     invalid_char = { '(', ')', '<', '>', ',', ';', ':', '"', '[', ']', '|', 'ç', '%', '&', ' ' }
-
+    
     for character in invalid_char:
         if character in username:
             valid=False
 
+    conn = sqlite3.connect(DATABASE) # Connexion à la base de donnée
+    cursor = conn.cursor() # Création de l'objet "curseur"
+        
+    cursor.execute("""SELECT name FROM users WHERE name=?""", (username,))
+    tmp = cursor.fetchone()
+    conn.close()
+        
+    if tmp:
+        valid = True
+    else:
+        valid = False
+    
+        
     return valid
 
 def set_mail_domain():
@@ -109,7 +122,7 @@ def valid_token_register(token, token_type):
                 cursor.execute("""SELECT name FROM users where token=?""", (token,))
         tmp = cursor.fetchone()
         conn.close()
-        print (tmp)
+        
         if tmp:
             valid = True
         else:
@@ -121,7 +134,6 @@ def valid_token_register(token, token_type):
 
 def get_user_by_token(token, token_type):
 
-
     if len(token) != 30 and len(token) != 64:
         user = "Invalid Token"