Initial working version with minor bugs

friend_codes/forms.py

@@ -0,0 +1,22 @@
+from django import forms
+from .models import FriendCode
+
+class FriendCodeForm(forms.ModelForm):
+    class Meta:
+        model = FriendCode
+        fields = ["friend_code"]
+
+    def clean_friend_code(self):
+        friend_code = self.cleaned_data.get("friend_code", "").strip()
+        
+        # Remove any dashes from the input so we can validate the digits only.
+        friend_code_clean = friend_code.replace("-", "")
+        
+        # Ensure that the cleaned friend code is exactly 16 digits.
+        if len(friend_code_clean) != 16 or not friend_code_clean.isdigit():
+            raise forms.ValidationError("Friend code must be exactly 16 digits long.")
+        
+        # Format the friend code with dashes: XXXX-XXXX-XXXX-XXXX.
+        friend_code_formatted = f"{friend_code_clean[:4]}-{friend_code_clean[4:8]}-{friend_code_clean[8:12]}-{friend_code_clean[12:16]}"
+        
+        return friend_code_formatted