Fix friend_code max length issues in tests, and fix in_game_name length issues, also update tests to fit more scenarios

accounts/models.py

@@ -1,6 +1,14 @@
 from django.contrib.auth.models import AbstractUser
 from django.db import models
 from django.core.exceptions import ValidationError
+import re
+
+def validate_friend_code(value):
+    """Validate that friend code follows the format XXXX-XXXX-XXXX-XXXX where X is a digit."""
+    if not re.match(r'^\d{4}-\d{4}-\d{4}-\d{4}$', value):
+        raise ValidationError(
+            'Friend code must be in format XXXX-XXXX-XXXX-XXXX where X is a digit.'
+        )
 
 class CustomUser(AbstractUser):
     default_friend_code = models.ForeignKey("FriendCode", on_delete=models.SET_NULL, null=True, blank=True)
@@ -34,8 +42,8 @@ class CustomUser(AbstractUser):
             self.save(update_fields=["default_friend_code"])
 
 class FriendCode(models.Model):
-    friend_code = models.CharField(max_length=19)
+    friend_code = models.CharField(max_length=19, validators=[validate_friend_code])
-    in_game_name = models.CharField(max_length=16, null=False, blank=False)
+    in_game_name = models.CharField(max_length=14, null=False, blank=False)
     user = models.ForeignKey(CustomUser, on_delete=models.PROTECT, related_name='friend_codes')
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)

accounts/tests.py

@@ -12,6 +12,7 @@ from accounts.models import FriendCode
 from accounts.forms import FriendCodeForm, CustomUserCreationForm, UserSettingsForm
 from accounts.templatetags import gravatar
 from trades.models import TradeOffer
+from tests.utils.rarity import RARITY_MAPPING
 
 # Create your tests here.
 
@@ -415,11 +416,11 @@ class FriendCodeViewsTests(TestCase):
         response = self.client.get(url)
         self.assertEqual(response.status_code, 200)
         # POST request.
-        new_data = {"in_game_name": "UpdatedViewGame"}
+        new_data = {"in_game_name": "UpdatedGame"}
         response = self.client.post(url, new_data)
         self.assertEqual(response.status_code, 302)
         self.friend_code2.refresh_from_db()
-        self.assertEqual(self.friend_code2.in_game_name, "UpdatedViewGame")
+        self.assertEqual(self.friend_code2.in_game_name, "UpdatedGame")
 
     def test_edit_friend_code_view_wrong_user(self):
         """A user should not be able to edit a friend code that does not belong to them."""
@@ -490,7 +491,7 @@ class FriendCodeViewsTests(TestCase):
         self.trade_offer = TradeOffer.objects.create(
             initiated_by=self.friend_code2,
             is_closed=False,
-            rarity_icon="⭐️",
+            rarity_icon=RARITY_MAPPING[5],
             rarity_level=5
         )
         url = reverse("delete_friend_code", kwargs={"pk": self.friend_code2.pk})

cards/models.py

@@ -36,16 +36,18 @@ class Deck(models.Model):
 
 class Card(models.Model):
   id = models.AutoField(primary_key=True)
-  name = models.CharField(max_length=128)
+  name = models.CharField(max_length=64)
   decks = models.ManyToManyField("Deck")
-  cardset = models.CharField(max_length=8)
+  cardset = models.CharField(max_length=32)
   cardnum = models.IntegerField()
-  style = models.CharField(max_length=255, null=False)
+  style = models.CharField(max_length=16)
-  rarity_icon = models.CharField(max_length=8)
+  rarity_icon = models.CharField(max_length=12)
   rarity_level = models.IntegerField()
   created_at = models.DateTimeField(auto_now_add=True)
   updated_at = models.DateTimeField(auto_now=True)
 
+  class Meta:
+    unique_together = ('cardset', 'cardnum')
+
   def __str__(self):
-    # For display, we show the original rarity icons.
+    return f"{self.name} ({self.cardset} #{self.cardnum})"
-    return f"{self.name} {self.rarity_icon} {self.cardset}"

cards/tests.py

@@ -9,6 +9,7 @@ from accounts.models import CustomUser, FriendCode
 from cards.models import Card, Deck, DeckNameTranslation, CardNameTranslation
 from trades.models import TradeOffer, TradeOfferHaveCard, TradeOfferWantCard
 from cards.templatetags import card_badge, card_multiselect
+from tests.utils.rarity import RARITY_MAPPING
 
 class CardsModelsTests(TestCase):
     def setUp(self):
@@ -19,15 +20,15 @@ class CardsModelsTests(TestCase):
             name="Test Card",
             cardset="A",
             cardnum=1,
-            style="color: blue;",
+            style="default",
-            rarity_icon="★",
+            rarity_icon=RARITY_MAPPING[1],
             rarity_level=1
         )
         # Establish many-to-many relationship.
         self.card.decks.add(self.deck)
 
     def test_card_str(self):
-        expected = f"{self.card.name} {self.card.rarity_icon} {self.card.cardset}"
+        expected = f"{self.card.name} ({self.card.cardset} #{self.card.cardnum})"
         self.assertEqual(str(self.card), expected)
 
     def test_deck_str(self):
@@ -158,8 +159,8 @@ class CardsViewsTests(TestCase):
             name="Test Card",
             cardset="A",
             cardnum=1,
-            style="background: red;",
+            style="default",
-            rarity_icon="★",
+            rarity_icon=RARITY_MAPPING[1],
             rarity_level=1
         )
 

home/tests.py

@@ -10,6 +10,7 @@ from collections import OrderedDict
 from unittest.mock import patch, MagicMock
 from django.core.exceptions import ObjectDoesNotExist
 import importlib
+from tests.utils.rarity import RARITY_MAPPING
 
 User = get_user_model()
 
@@ -74,13 +75,13 @@ class HomePageViewTests(TestCase):
         # Create trade offers with consistent rarities
         cls.common_trade = TradeOffer.objects.create(
             initiated_by=cls.friend_code,
-            rarity_icon='★',
+            rarity_icon=RARITY_MAPPING[1],
             rarity_level=1
         )
         
         cls.rare_trade = TradeOffer.objects.create(
             initiated_by=cls.friend_code,
-            rarity_icon='★★★',
+            rarity_icon=RARITY_MAPPING[3],
             rarity_level=3
         )
         

tests/utils/rarity.py

@@ -0,0 +1,10 @@
+RARITY_MAPPING = {
+    1: "🔷",
+    2: "🔷🔷",
+    3: "🔷🔷🔷",
+    4: "🔷🔷🔷🔷",
+    5: "⭐️",
+    6: "⭐️⭐️",
+    7: "⭐️⭐️⭐️",
+    8: "👑"
+} 

trades/mixins.py

@@ -1,4 +1,5 @@
 from cards.models import Card
+from django.core.exceptions import PermissionDenied
 
 class TradeOfferContextMixin:
     def get_context_data(self, **kwargs):
@@ -20,4 +21,17 @@ class TradeOfferContextMixin:
             selected_friend_code = self.request.user.default_friend_code or friend_codes.first()
         context["selected_friend_code"] = selected_friend_code
         
-        return context 
+        return context 
+
+class FriendCodeRequiredMixin:
+    """
+    Mixin to ensure the authenticated user has at least one friend code.
+    This mixin must be placed after LoginRequiredMixin in the view's inheritance order.
+    """
+    def dispatch(self, request, *args, **kwargs):
+        # Since LoginRequiredMixin guarantees that request.user is authenticated,
+        # we assume request.user has the attribute `friend_codes`. If no friend code exists,
+        # raise a PermissionDenied error.
+        if not getattr(request.user, 'friend_codes', None) or not request.user.friend_codes.exists():
+            raise PermissionDenied("No friend codes available for your account.")
+        return super().dispatch(request, *args, **kwargs) 

trades/models.py

@@ -254,12 +254,12 @@ class TradeAcceptance(models.Model):
     def clean(self):
         # Validate that the requested and offered cards exist in the through tables.
         try:
-            have_through_obj = self.trade_offer.trade_offer_have_cards.get(card=self.requested_card)
+            have_through_obj = self.trade_offer.trade_offer_have_cards.get(card_id=self.requested_card_id)
         except TradeOfferHaveCard.DoesNotExist:
             raise ValidationError("The requested card must be one of the trade offer's available cards (have_cards).")
 
         try:
-            want_through_obj = self.trade_offer.trade_offer_want_cards.get(card=self.offered_card)
+            want_through_obj = self.trade_offer.trade_offer_want_cards.get(card_id=self.offered_card_id)
         except TradeOfferWantCard.DoesNotExist:
             raise ValidationError("The offered card must be one of the trade offer's requested cards (want_cards).")
 
@@ -279,11 +279,11 @@ class TradeAcceptance(models.Model):
         if self.pk:
             active_acceptances = active_acceptances.exclude(pk=self.pk)
 
-        requested_count = active_acceptances.filter(requested_card=self.requested_card).count()
+        requested_count = active_acceptances.filter(requested_card_id=self.requested_card_id).count()
         if requested_count >= have_through_obj.quantity:
             raise ValidationError("This requested card has been fully accepted.")
 
-        offered_count = active_acceptances.filter(offered_card=self.offered_card).count()
+        offered_count = active_acceptances.filter(offered_card_id=self.offered_card_id).count()
         if offered_count >= want_through_obj.quantity:
             raise ValidationError("This offered card has already been fully used.")
 

trades/tests.py

@@ -18,7 +18,7 @@ from trades.forms import (
     TradeOfferAcceptForm,
     TradeAcceptanceTransitionForm,
 )
-
+from tests.utils.rarity import RARITY_MAPPING
 
 # ------------------------------------------------------------------------
 # Model Tests
@@ -26,27 +26,29 @@ from trades.forms import (
 class TradeOfferModelTest(TestCase):
     def setUp(self):
         User = get_user_model()
-        # Create a user and friend code for testing
         self.user = User.objects.create_user(
             username="testuser", email="test@example.com", password="password"
         )
         self.friend_code = FriendCode.objects.create(
-            friend_code="FC-1234", in_game_name="TestInGame", user=self.user
+            friend_code="1234-5678-9012-3456", in_game_name="TestInGame", user=self.user
         )
 
         # Create cards with the same rarity (valid scenario)
         self.card1 = Card.objects.create(
-            name="Card1", cardset="set1", cardnum=1, style="default", rarity_icon="R", rarity_level=1
+            name="Card1", cardset="set1", cardnum=1, style="default", 
+            rarity_icon=RARITY_MAPPING[1], rarity_level=1
         )
         self.card2 = Card.objects.create(
-            name="Card2", cardset="set1", cardnum=2, style="default", rarity_icon="R", rarity_level=1
+            name="Card2", cardset="set1", cardnum=2, style="default", 
+            rarity_icon=RARITY_MAPPING[1], rarity_level=1
         )
         # Create a card with a different rarity (to test invalid trade offers)
         self.card3 = Card.objects.create(
-            name="Card3", cardset="set1", cardnum=3, style="default", rarity_icon="SR", rarity_level=2
+            name="Card3", cardset="set1", cardnum=3, style="default", 
+            rarity_icon=RARITY_MAPPING[8], rarity_level=8
         )
 
-        # Create a valid trade offer with consistent rarity details.
+        # Create a valid trade offer with consistent rarity details
         self.trade_offer = TradeOffer.objects.create(initiated_by=self.friend_code)
         TradeOfferHaveCard.objects.create(
             trade_offer=self.trade_offer, card=self.card1, quantity=2
@@ -59,7 +61,7 @@ class TradeOfferModelTest(TestCase):
         """Test update_rarity_fields succeeds with cards sharing the same rarity."""
         self.trade_offer.update_rarity_fields()
         self.assertEqual(self.trade_offer.rarity_level, 1)
-        self.assertEqual(self.trade_offer.rarity_icon, "R")
+        self.assertEqual(self.trade_offer.rarity_icon, "🔷")
 
     def test_update_rarity_fields_invalid(self):
         """If a card with a different rarity is added, update_rarity_fields should raise an error."""
@@ -84,21 +86,23 @@ class TradeAcceptanceModelTest(TestCase):
             username="acceptuser", email="acc@example.com", password="password"
         )
         self.friend_code = FriendCode.objects.create(
-            friend_code="FC-5678", in_game_name="AccInGame", user=self.user
+            friend_code="1111-2222-3333-4444", in_game_name="AccInGame", user=self.user
         )
         self.other_user = User.objects.create_user(
             username="initiator", email="init@example.com", password="password"
         )
         self.initiator_friend_code = FriendCode.objects.create(
-            friend_code="FC-0000", in_game_name="InitInGame", user=self.other_user
+            friend_code="5555-6666-7777-8888", in_game_name="InitInGame", user=self.other_user
         )
 
         # Create two cards (with the same rarity)
         self.card1 = Card.objects.create(
-            name="CardA", cardset="setA", cardnum=1, style="default", rarity_icon="R", rarity_level=1
+            name="CardA", cardset="setA", cardnum=1, style="default", 
+            rarity_icon=RARITY_MAPPING[2], rarity_level=2
         )
         self.card2 = Card.objects.create(
-            name="CardB", cardset="setA", cardnum=2, style="default", rarity_icon="R", rarity_level=1
+            name="CardB", cardset="setA", cardnum=2, style="default", 
+            rarity_icon=RARITY_MAPPING[2], rarity_level=2
         )
 
         # Create a trade offer by the initiator.
@@ -198,16 +202,16 @@ class TradeOfferFormTest(TestCase):
             username="formuser", email="form@example.com", password="password"
         )
         self.friend_code = FriendCode.objects.create(
-            friend_code="FC-FORM", in_game_name="FormUser", user=self.user
+            friend_code="9999-8888-7777-6666", in_game_name="FormUser", user=self.user
         )
         # Create two cards with the same rarity details.
         self.card1 = Card.objects.create(
             name="FormCard1", cardset="formset", cardnum=1, style="default",
-            rarity_icon="R", rarity_level=1
+            rarity_icon=RARITY_MAPPING[3], rarity_level=3
         )
         self.card2 = Card.objects.create(
             name="FormCard2", cardset="formset", cardnum=2, style="default",
-            rarity_icon="R", rarity_level=1
+            rarity_icon=RARITY_MAPPING[3], rarity_level=3
         )
 
     def test_trade_offer_create_form_valid(self):
@@ -325,7 +329,7 @@ class TradeViewsTest(TestCase):
             username="viewuser", email="view@example.com", password="password"
         )
         self.friend_code = FriendCode.objects.create(
-            friend_code="FC-VIEW", in_game_name="ViewUser", user=self.user
+            friend_code="4444-3333-2222-1111", in_game_name="ViewUser", user=self.user
         )
         self.user.default_friend_code = self.friend_code
         self.user.save(update_fields=["default_friend_code"])
@@ -334,11 +338,11 @@ class TradeViewsTest(TestCase):
         # Create sample cards.
         self.card1 = Card.objects.create(
             name="ViewCard1", cardset="setV", cardnum=1, style="default",
-            rarity_icon="R", rarity_level=1
+            rarity_icon=RARITY_MAPPING[7], rarity_level=7
         )
         self.card2 = Card.objects.create(
             name="ViewCard2", cardset="setV", cardnum=2, style="default",
-            rarity_icon="R", rarity_level=1
+            rarity_icon=RARITY_MAPPING[7], rarity_level=7
         )
         # Create a trade offer initiated by the logged-in user's friend code.
         self.trade_offer = TradeOffer.objects.create(initiated_by=self.friend_code)
@@ -460,3 +464,462 @@ class TradeViewsTest(TestCase):
             valid_state = allowed_states[0]
             response = self.client.post(update_url, {"state": valid_state})
             self.assertEqual(response.status_code, 302)
+
+
+class TradeOfferSecurityTests(TestCase):
+    def setUp(self):
+        User = get_user_model()
+        # Create three users for testing various security scenarios
+        self.user1 = User.objects.create_user(
+            username="user1", email="user1@example.com", password="password1"
+        )
+        self.user2 = User.objects.create_user(
+            username="user2", email="user2@example.com", password="password2"
+        )
+        self.user3 = User.objects.create_user(
+            username="user3", email="user3@example.com", password="password3"
+        )
+
+        # Create friend codes for each user with correct format
+        self.fc1 = FriendCode.objects.create(
+            friend_code="1111-2222-3333-4444", in_game_name="User1Game", user=self.user1
+        )
+        self.fc2 = FriendCode.objects.create(
+            friend_code="5555-6666-7777-8888", in_game_name="User2Game", user=self.user2
+        )
+        self.fc3 = FriendCode.objects.create(
+            friend_code="9999-0000-1111-2222", in_game_name="User3Game", user=self.user3
+        )
+
+        # Create test cards with proper rarity levels
+        self.card1 = Card.objects.create(
+            name="SecCard1", cardset="secset", cardnum=1, style="default",
+            rarity_icon=RARITY_MAPPING[3], rarity_level=3
+        )
+        self.card2 = Card.objects.create(
+            name="SecCard2", cardset="secset", cardnum=2, style="default",
+            rarity_icon=RARITY_MAPPING[3], rarity_level=3
+        )
+
+        # Create a trade offer by user1
+        self.trade_offer = TradeOffer.objects.create(initiated_by=self.fc1)
+        TradeOfferHaveCard.objects.create(
+            trade_offer=self.trade_offer, card=self.card1, quantity=1
+        )
+        TradeOfferWantCard.objects.create(
+            trade_offer=self.trade_offer, card=self.card2, quantity=1
+        )
+
+        self.client = Client()
+
+    def test_unauthorized_trade_offer_deletion(self):
+        """Test that users cannot delete trade offers they don't own."""
+        self.client.login(username="user2", password="password2")
+        response = self.client.post(
+            reverse("trade_offer_delete", kwargs={"pk": self.trade_offer.pk})
+        )
+        self.assertEqual(response.status_code, 403)
+        self.assertTrue(TradeOffer.objects.filter(pk=self.trade_offer.pk).exists())
+
+    def test_unauthorized_trade_acceptance_update(self):
+        """Test that uninvolved users cannot update trade acceptances."""
+        # Create an acceptance between user2 and user1's offer
+        acceptance = TradeAcceptance.objects.create(
+            trade_offer=self.trade_offer,
+            accepted_by=self.fc2,
+            requested_card=self.card1,
+            offered_card=self.card2,
+            state=TradeAcceptance.AcceptanceState.ACCEPTED,
+        )
+
+        # Try to update the acceptance as user3 (uninvolved)
+        self.client.login(username="user3", password="password3")
+        response = self.client.post(
+            reverse("trade_acceptance_update", kwargs={"pk": acceptance.pk}),
+            {"state": TradeAcceptance.AcceptanceState.SENT}
+        )
+        self.assertEqual(response.status_code, 403)
+
+    def test_cross_user_friend_code_manipulation(self):
+        """Test that users cannot use other users' friend codes."""
+        self.client.login(username="user2", password="password2")
+        
+        # Try to create a trade offer using user1's friend code
+        response = self.client.get(
+            reverse("trade_offer_create"),
+            {
+                "initiated_by": self.fc1.pk,  # User1's friend code
+                "have_cards": [f"{self.card1.pk}:1"],
+                "want_cards": [f"{self.card2.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)  # Form should fail validation
+        self.assertFalse(
+            TradeOffer.objects.filter(initiated_by=self.fc1).count() > 1
+        )
+
+    def test_authenticated_only_views(self):
+        """Test that authenticated-only views are properly protected."""
+        # Test without login
+        urls_to_test = [
+            reverse("trade_offer_create"),
+            reverse("trade_offer_my_list"),
+            reverse("trade_acceptance_create", kwargs={"offer_pk": self.trade_offer.pk}),
+        ]
+        
+        # First ensure we're logged out
+        self.client.logout()
+        
+        for url in urls_to_test:
+            response = self.client.get(url)
+            self.assertRedirects(
+                response,
+                f"/accounts/login/?next={url}",
+                msg_prefix=f"URL {url} should require authentication"
+            )
+
+
+class TradeOfferEdgeCasesTest(TestCase):
+    def setUp(self):
+        User = get_user_model()
+        self.user = User.objects.create_user(
+            username="edgeuser", email="edge@example.com", password="password"
+        )
+        self.friend_code = FriendCode.objects.create(
+            friend_code="3333-4444-5555-6666", in_game_name="EdgeUser", user=self.user
+        )
+        
+        # Create test cards with different rarities using proper levels and icons
+        self.common_card = Card.objects.create(
+            name="CommonCard", cardset="edgeset", cardnum=1, style="default",
+            rarity_icon=RARITY_MAPPING[1], rarity_level=1
+        )
+        self.rare_card = Card.objects.create(
+            name="RareCard", cardset="edgeset", cardnum=2, style="default",
+            rarity_icon=RARITY_MAPPING[5], rarity_level=5
+        )
+        self.crown_card = Card.objects.create(
+            name="CrownCard", cardset="edgeset", cardnum=3, style="default",
+            rarity_icon=RARITY_MAPPING[8], rarity_level=8
+        )
+
+        self.client = Client()
+        self.client.login(username="edgeuser", password="password")
+
+    def test_zero_quantity_trade_offer(self):
+        """Test that trade offers with zero quantity are handled properly."""
+        response = self.client.get(
+            reverse("trade_offer_create"),
+            {
+                "initiated_by": self.friend_code.pk,
+                "have_cards": [f"{self.common_card.pk}:0"],
+                "want_cards": [f"{self.common_card.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(
+            TradeOffer.objects.filter(initiated_by=self.friend_code).exists()
+        )
+
+    def test_negative_quantity_trade_offer(self):
+        """Test that trade offers with negative quantity are handled properly."""
+        response = self.client.get(
+            reverse("trade_offer_create"),
+            {
+                "initiated_by": self.friend_code.pk,
+                "have_cards": [f"{self.common_card.pk}:-1"],
+                "want_cards": [f"{self.common_card.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(
+            TradeOffer.objects.filter(initiated_by=self.friend_code).exists()
+        )
+
+    def test_mixed_rarity_trade_offer(self):
+        """Test that trade offers with mixed rarity cards are rejected."""
+        response = self.client.get(
+            reverse("trade_offer_create"),
+            {
+                "initiated_by": self.friend_code.pk,
+                "have_cards": [f"{self.common_card.pk}:1"],
+                "want_cards": [f"{self.crown_card.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(
+            TradeOffer.objects.filter(initiated_by=self.friend_code).exists()
+        )
+
+    def test_duplicate_card_entries(self):
+        """Test handling of duplicate card entries in trade offers."""
+        response = self.client.get(
+            reverse("trade_offer_create"),
+            {
+                "initiated_by": self.friend_code.pk,
+                "have_cards": [
+                    f"{self.common_card.pk}:1",
+                    f"{self.common_card.pk}:1"
+                ],
+                "want_cards": [f"{self.common_card.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(
+            TradeOffer.objects.filter(initiated_by=self.friend_code).exists()
+        )
+
+
+class TradeSearchTests(TestCase):
+    def setUp(self):
+        User = get_user_model()
+        self.user = User.objects.create_user(
+            username="searchuser", email="search@example.com", password="password"
+        )
+        self.friend_code = FriendCode.objects.create(
+            friend_code="7777-8888-9999-0000", in_game_name="SearchUser", user=self.user
+        )
+
+        # Create test cards with proper rarity levels
+        self.card1 = Card.objects.create(
+            name="SearchCard1", cardset="sc1", cardnum=1, style="default",
+            rarity_icon=RARITY_MAPPING[4], rarity_level=4
+        )
+        self.card2 = Card.objects.create(
+            name="SearchCard2", cardset="sc1", cardnum=2, style="default",
+            rarity_icon=RARITY_MAPPING[4], rarity_level=4
+        )
+        self.card3 = Card.objects.create(
+            name="SearchCard3", cardset="sc1", cardnum=3, style="default",
+            rarity_icon=RARITY_MAPPING[4], rarity_level=4
+        )
+
+        # Create some trade offers
+        self.trade_offer1 = TradeOffer.objects.create(initiated_by=self.friend_code)
+        TradeOfferHaveCard.objects.create(
+            trade_offer=self.trade_offer1, card=self.card1, quantity=2
+        )
+        TradeOfferWantCard.objects.create(
+            trade_offer=self.trade_offer1, card=self.card2, quantity=1
+        )
+
+        self.trade_offer2 = TradeOffer.objects.create(initiated_by=self.friend_code)
+        TradeOfferHaveCard.objects.create(
+            trade_offer=self.trade_offer2, card=self.card2, quantity=1
+        )
+        TradeOfferWantCard.objects.create(
+            trade_offer=self.trade_offer2, card=self.card3, quantity=1
+        )
+
+        self.client = Client()
+
+    def test_search_by_have_cards(self):
+        """Test searching for trade offers by cards the user has doesn't show offers initiated by the user."""
+        response = self.client.post(
+            reverse("trade_offer_search"),
+            {
+                "have_cards": [f"{self.card2.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertNotContains(response, self.trade_offer1.initiated_by.in_game_name)
+        self.assertNotContains(response, self.trade_offer2.initiated_by.in_game_name)
+
+    def test_search_by_want_cards(self):
+        """Test searching for trade offers by cards the user wants doesn't show offers initiated by the user."""
+        response = self.client.post(
+            reverse("trade_offer_search"),
+            {
+                "want_cards": [f"{self.card1.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertNotContains(response, self.trade_offer1.initiated_by.in_game_name)
+        self.assertNotContains(response, self.trade_offer2.initiated_by.in_game_name)
+
+    def test_search_with_invalid_card_id(self):
+        """Test search behavior with invalid card IDs."""
+        response = self.client.post(
+            reverse("trade_offer_search"),
+            {
+                "have_cards": ["999999:1"],  # Non-existent card ID
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertNotContains(response, self.trade_offer1.initiated_by.in_game_name)
+        self.assertNotContains(response, self.trade_offer2.initiated_by.in_game_name)
+
+    def test_search_closed_trades(self):
+        """Test that closed trades don't appear in search results."""
+        self.trade_offer1.is_closed = True
+        self.trade_offer1.save()
+        
+        response = self.client.post(
+            reverse("trade_offer_search"),
+            {
+                "have_cards": [f"{self.card2.pk}:1"],
+            }
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertNotContains(response, self.trade_offer1.initiated_by.in_game_name)
+
+
+class TradeAcceptanceComplexTests(TestCase):
+    def setUp(self):
+        User = get_user_model()
+        self.initiator = User.objects.create_user(
+            username="initiator", email="init@example.com", password="password"
+        )
+        self.acceptor = User.objects.create_user(
+            username="acceptor", email="accept@example.com", password="password"
+        )
+        
+        self.initiator_fc = FriendCode.objects.create(
+            friend_code="1234-5678-9012-3456", in_game_name="InitUser", user=self.initiator
+        )
+        self.acceptor_fc = FriendCode.objects.create(
+            friend_code="6543-2109-8765-4321", in_game_name="AcceptUser", user=self.acceptor
+        )
+
+        # Create test cards with proper rarity levels
+        self.card1 = Card.objects.create(
+            name="ComplexCard1", cardset="cx1", cardnum=1, style="default",
+            rarity_icon=RARITY_MAPPING[6], rarity_level=6
+        )
+        self.card2 = Card.objects.create(
+            name="ComplexCard2", cardset="cx1", cardnum=2, style="default",
+            rarity_icon=RARITY_MAPPING[6], rarity_level=6
+        )
+        self.card3 = Card.objects.create(
+            name="ComplexCard3", cardset="cx1", cardnum=3, style="default",
+            rarity_icon=RARITY_MAPPING[6], rarity_level=6
+        )
+        self.card4 = Card.objects.create(
+            name="ComplexCard4", cardset="cx1", cardnum=4, style="default",
+            rarity_icon=RARITY_MAPPING[6], rarity_level=6
+        )
+
+        # Create a trade offer with multiple quantities
+        self.trade_offer = TradeOffer.objects.create(initiated_by=self.initiator_fc)
+        TradeOfferHaveCard.objects.create(
+            trade_offer=self.trade_offer, card=self.card1, quantity=3
+        )
+        TradeOfferHaveCard.objects.create(
+            trade_offer=self.trade_offer, card=self.card3, quantity=1
+        )
+        TradeOfferWantCard.objects.create(
+            trade_offer=self.trade_offer, card=self.card2, quantity=3
+        )
+        TradeOfferWantCard.objects.create(
+            trade_offer=self.trade_offer, card=self.card4, quantity=1
+        )
+
+        self.client = Client()
+
+    def test_multiple_acceptances_quantity_limit(self):
+        """Test that multiple acceptances cannot exceed the offer's quantity limit."""
+        self.client.login(username="acceptor", password="password")
+        
+        # Create first acceptance
+        response1 = self.client.post(
+            reverse("trade_acceptance_create", kwargs={"offer_pk": self.trade_offer.pk}),
+            {
+                "accepted_by": self.acceptor_fc.pk,
+                "requested_card": self.card1.pk,
+                "offered_card": self.card2.pk,
+            }
+        )
+        self.assertEqual(response1.status_code, 302)  # Successful creation
+
+        # Create second acceptance
+        response2 = self.client.post(
+            reverse("trade_acceptance_create", kwargs={"offer_pk": self.trade_offer.pk}),
+            {
+                "accepted_by": self.acceptor_fc.pk,
+                "requested_card": self.card1.pk,
+                "offered_card": self.card2.pk,
+            }
+        )
+        self.assertEqual(response2.status_code, 302)  # Successful creation
+
+        # Try to create a fourth acceptance (should fail as only 3 are allowed)
+        response3 = self.client.post(
+            reverse("trade_acceptance_create", kwargs={"offer_pk": self.trade_offer.pk}),
+            {
+                "accepted_by": self.acceptor_fc.pk,
+                "requested_card": self.card1.pk,
+                "offered_card": self.card2.pk,
+            }
+        )
+        self.assertEqual(response3.status_code, 302)  # Successful creation
+
+        response4 = self.client.post(
+            reverse("trade_acceptance_create", kwargs={"offer_pk": self.trade_offer.pk}),
+            {
+                "accepted_by": self.acceptor_fc.pk,
+                "requested_card": self.card1.pk,
+                "offered_card": self.card2.pk,
+            }
+        )
+        self.assertEqual(response4.status_code, 200)  # Should fail
+        self.assertEqual(
+            self.trade_offer.acceptances.count(), 3,
+            "Should not allow more acceptances than the quantity limit"
+        )
+
+    def test_complex_state_transitions(self):
+        """Test complex state transition scenarios."""
+        self.client.login(username="acceptor", password="password")
+        
+        # Create an acceptance
+        acceptance = TradeAcceptance.objects.create(
+            trade_offer=self.trade_offer,
+            accepted_by=self.acceptor_fc,
+            requested_card=self.card1,
+            offered_card=self.card2,
+            state=TradeAcceptance.AcceptanceState.ACCEPTED,
+        )
+
+        # Test invalid state transition sequence
+        invalid_transitions = [
+            TradeAcceptance.AcceptanceState.THANKED_BY_ACCEPTOR,  # Can't thank before sending
+            TradeAcceptance.AcceptanceState.RECEIVED,  # Can't receive before sending
+            TradeAcceptance.AcceptanceState.THANKED_BY_BOTH,  # Can't thank by both directly
+        ]
+
+        for invalid_state in invalid_transitions:
+            response = self.client.post(
+                reverse("trade_acceptance_update", kwargs={"pk": acceptance.pk}),
+                {"state": invalid_state}
+            )
+            self.assertEqual(response.status_code, 200)  # Should stay on form
+            acceptance.refresh_from_db()
+            self.assertEqual(
+                acceptance.state,
+                TradeAcceptance.AcceptanceState.ACCEPTED,
+                f"Invalid transition to {invalid_state} should not be allowed"
+            )
+
+        # Test valid state transition sequence
+        valid_transitions = [
+            (self.initiator, TradeAcceptance.AcceptanceState.SENT),
+            (self.acceptor, TradeAcceptance.AcceptanceState.RECEIVED),
+            (self.initiator, TradeAcceptance.AcceptanceState.THANKED_BY_INITIATOR),
+            (self.acceptor, TradeAcceptance.AcceptanceState.THANKED_BY_BOTH),
+        ]
+
+        for user, state in valid_transitions:
+            self.client.login(username=user.username, password="password")
+            response = self.client.post(
+                reverse("trade_acceptance_update", kwargs={"pk": acceptance.pk}),
+                {"state": state}
+            )
+            self.assertEqual(response.status_code, 302)  # Should redirect on success
+            acceptance.refresh_from_db()
+            self.assertEqual(
+                acceptance.state,
+                state,
+                f"Valid transition to {state} should be allowed"
+            )
+
+

trades/views.py

@@ -25,6 +25,7 @@ from trades.templatetags.trade_offer_tags import render_trade_offer
 from django.template import RequestContext
 from playwright.sync_api import sync_playwright
 from django.conf import settings
+from .mixins import FriendCodeRequiredMixin
 
 class TradeOfferCreateView(LoginRequiredMixin, CreateView):
     http_method_names = ['get']  # restricts this view to GET only
@@ -108,15 +109,10 @@ class TradeOfferAllListView(ListView):
             )
         return super().render_to_response(context, **response_kwargs)
 
-class TradeOfferMyListView(LoginRequiredMixin, ListView):
+class TradeOfferMyListView(LoginRequiredMixin, FriendCodeRequiredMixin, ListView):
-    model = TradeOffer  # Fallback model; our context data holds separate filtered querysets.
+    model = TradeOffer
     template_name = "trades/trade_offer_my_list.html"
 
-    def dispatch(self, request, *args, **kwargs):
-        if request.user.is_authenticated and not request.user.friend_codes.exists():
-            raise PermissionDenied("No friend codes available for your account.")
-        return super().dispatch(request, *args, **kwargs)
-
     def get_selected_friend_code(self):
         friend_codes = self.request.user.friend_codes.all()
         friend_code_param = self.request.GET.get("friend_code")
@@ -127,10 +123,8 @@ class TradeOfferMyListView(LoginRequiredMixin, ListView):
                 selected_friend_code = self.request.user.default_friend_code or friend_codes.first()
         else:
             selected_friend_code = self.request.user.default_friend_code or friend_codes.first()
-
         if not selected_friend_code:
             raise PermissionDenied("You do not have an active friend code associated with your account.")
-
         return selected_friend_code
 
     def get_show_closed(self):
@@ -224,15 +218,13 @@ class TradeOfferMyListView(LoginRequiredMixin, ListView):
             return render(self.request, "trades/_trade_offer_list_paginated.html", {"offers": offers})
         return super().render_to_response(context, **response_kwargs)
 
-class TradeOfferDeleteView(LoginRequiredMixin, DeleteView):
+class TradeOfferDeleteView(LoginRequiredMixin, FriendCodeRequiredMixin, DeleteView):
     model = TradeOffer
     success_url = reverse_lazy("trade_offer_list")
     template_name = "trades/trade_offer_delete.html"
 
     def dispatch(self, request, *args, **kwargs):
-        # Retrieve the object normally
         self.object = super().get_object()
-        # Perform the permission check here
         if self.object.initiated_by_id not in request.user.friend_codes.values_list("id", flat=True):
             raise PermissionDenied("You are not authorized to delete or close this trade offer.")
         return super().dispatch(request, *args, **kwargs)
@@ -339,7 +331,10 @@ class TradeOfferSearchView(ListView):
 
         qs = TradeOffer.objects.filter(
             is_closed=False,
-        ).exclude(initiated_by__in=self.request.user.friend_codes.all())
+        )
+        
+        if self.request.user.is_authenticated:
+            qs = qs.exclude(initiated_by__in=self.request.user.friend_codes.all())
 
         # Chain filters for offered selections (i.e. the user "has" cards).
         if have_selections:
@@ -498,7 +493,7 @@ class TradeOfferDetailView(DetailView):
 
         return context
 
-class TradeAcceptanceCreateView(LoginRequiredMixin, CreateView):
+class TradeAcceptanceCreateView(LoginRequiredMixin, FriendCodeRequiredMixin, CreateView):
     """
     View to create a new TradeAcceptance.
     The URL should provide 'offer_pk' so that the proper TradeOffer can be identified.
@@ -509,19 +504,17 @@ class TradeAcceptanceCreateView(LoginRequiredMixin, CreateView):
 
     def dispatch(self, request, *args, **kwargs):
         self.trade_offer = self.get_trade_offer()
-        if self.trade_offer.initiated_by_id in request.user.friend_codes.values_list("id", flat=True) or self.trade_offer.is_closed:
-            raise PermissionDenied("You cannot accept this trade offer.")
-        if not request.user.friend_codes.exists():
-            raise PermissionDenied("No friend codes available for your account.")
         return super().dispatch(request, *args, **kwargs)
 
     def get_trade_offer(self):
-        return (
+        return TradeOffer.objects.get(pk=self.kwargs['offer_pk'])
-            TradeOffer.objects.get(pk=self.kwargs['offer_pk'])
-        )
 
     def get_form_kwargs(self):
         kwargs = super().get_form_kwargs()
+        if (self.trade_offer.initiated_by_id in 
+            self.request.user.friend_codes.values_list("id", flat=True) or 
+            self.trade_offer.is_closed):
+            raise PermissionDenied("You cannot accept this trade offer.")
         kwargs['trade_offer'] = self.trade_offer
         kwargs['friend_codes'] = self.request.user.friend_codes.all()
         return kwargs
@@ -561,7 +554,7 @@ class TradeAcceptanceCreateView(LoginRequiredMixin, CreateView):
     def get_success_url(self):
         return reverse_lazy("trade_offer_detail", kwargs={"pk": self.trade_offer.pk})
 
-class TradeAcceptanceUpdateView(LoginRequiredMixin, UpdateView):
+class TradeAcceptanceUpdateView(LoginRequiredMixin, FriendCodeRequiredMixin, UpdateView):
     """
     View to update the state of an existing TradeAcceptance.
     The allowed state transitions are provided via the form.
@@ -572,10 +565,9 @@ class TradeAcceptanceUpdateView(LoginRequiredMixin, UpdateView):
 
     def dispatch(self, request, *args, **kwargs):
         self.object = self.get_object()
-        if not request.user.friend_codes.exists():
-            raise PermissionDenied("No friend codes available for your account.")
         friend_codes = request.user.friend_codes.values_list("id", flat=True)
-        if self.object.accepted_by_id not in friend_codes and self.object.trade_offer.initiated_by_id not in friend_codes:
+        if (self.object.accepted_by_id not in friend_codes and 
+            self.object.trade_offer.initiated_by_id not in friend_codes):
             raise PermissionDenied("You are not authorized to update this acceptance.")
         return super().dispatch(request, *args, **kwargs)