Enhance message handling in group views; add user feedback for actions and errors

Fix #4

base/static/css/main.css

@@ -64,3 +64,9 @@ article.message {
         color: var(--pico-color-red-500);
     }
 }
+
+.form-error::before  {
+    margin-right: .5em;
+    font-family: remixicon;
+    content: "\eca0";
+}

base/templates/base/form.html

@@ -1,8 +1,4 @@
-{% if form.non_field_errors %}
-    <ul class="form-errors">
-        {% for error in form.non_field_errors %}<li>{{ error }}</li>{% endfor %}
-    </ul>
-{% endif %}
+{% for error in form.non_field_errors %}<article class="message error">{{ error }}</article>{% endfor %}
 <form method="post" {% if action %}action="{% url action %}"{% endif %}>
     {% csrf_token %}
     <fieldset>
@@ -10,12 +6,10 @@
             <label>
                 {{ field.label }}
                 {{ field }}
-            </label>
                 {% if field.errors %}
-                <ul class="form-errors">
-                    {% for error in field.errors %}<li>{{ error }}</li>{% endfor %}
-                </ul>
+                    <small id="{{ field.errors.field_id }}_error" class="form-error">{{ field.errors|join:", " }}</small>
                 {% endif %}
+            </label>
         {% endfor %}
     </fieldset>
     <input type="submit" {% if submit %}value="{{ submit }}"{% endif %}>

game/migrations/0013_alter_group_unique_together_and_more.py

@@ -0,0 +1,53 @@
+# Generated by Django 5.2.3 on 2025-06-14 08:13
+
+import django.db.models.functions.text
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("game", "0012_alter_musikgame_playlist"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="group",
+            unique_together=set(),
+        ),
+        migrations.AlterUniqueTogether(
+            name="musicgameorder",
+            unique_together=set(),
+        ),
+        migrations.AlterUniqueTogether(
+            name="musicvideo",
+            unique_together=set(),
+        ),
+        migrations.AddConstraint(
+            model_name="group",
+            constraint=models.UniqueConstraint(
+                django.db.models.functions.text.Lower("name"),
+                models.F("owner"),
+                name="unique_group_name",
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="musicgameorder",
+            constraint=models.UniqueConstraint(
+                fields=("game", "player", "music_video"), name="unique_music_in_game"
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="musicgameorder",
+            constraint=models.UniqueConstraint(
+                fields=("game", "order"), name="unique_order"
+            ),
+        ),
+        migrations.AddConstraint(
+            model_name="musicvideo",
+            constraint=models.UniqueConstraint(
+                fields=("yt_id", "owner", "group"), name="unique_music_in_group"
+            ),
+        ),
+    ]

game/models.py

@@ -1,5 +1,6 @@
 from django.contrib.auth.models import User
 from django.db import models
+from django.db.models.functions import Lower
 from django.urls import reverse
 
 
@@ -19,7 +20,9 @@ class Group(models.Model):
         return reverse("group_detail", kwargs={"pk": self.pk})
 
     class Meta:
-        unique_together = ["name", "owner"]
+        constraints = [
+            models.UniqueConstraint(Lower("name"), "owner", name="unique_group_name")
+        ]
 
 
 class MusicVideo(models.Model):
@@ -31,7 +34,11 @@ class MusicVideo(models.Model):
     blacklisted = models.BooleanField(default=False)
 
     class Meta:
-        unique_together = ["yt_id", "owner", "group"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=("yt_id", "owner", "group"), name="unique_music_in_group"
+            )
+        ]
 
 
 class MusikGame(models.Model):
@@ -52,5 +59,10 @@ class MusicGameOrder(models.Model):
     order = models.PositiveIntegerField()
 
     class Meta:
-        unique_together = [["game", "player", "music_video"], ["game", "order"]]
+        constraints = [
+            models.UniqueConstraint(
+                fields=("game", "player", "music_video"), name="unique_music_in_game"
+            ),
+            models.UniqueConstraint(fields=("game", "order"), name="unique_order"),
+        ]
         ordering = ["order"]

game/views.py

@@ -4,12 +4,13 @@ import google.oauth2.credentials
 import google_auth_oauthlib
 import googleapiclient.discovery
 from django.conf import settings
+from django.contrib import messages
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.contrib.auth.models import User
 from django.contrib.messages.views import SuccessMessageMixin
+from django.db import IntegrityError
 from django.db.models import Count, Q
-from django.http import JsonResponse
-from django.shortcuts import get_object_or_404, redirect
+from django.shortcuts import redirect
 from django.views import View
 from django.views.generic.detail import DetailView, SingleObjectMixin
 from django.views.generic.edit import CreateView, DeleteView, UpdateView
@@ -37,13 +38,22 @@ class GroupMixin:
     fields = ["name"]
 
 
-class GroupCreateView(LoginRequiredMixin, GroupMixin, CreateView):
+class GroupIntegrityMixin:
+    def form_valid(self, form):
+        try:
+            return super().form_valid(form)
+        except IntegrityError:
+            form.add_error("name", "Ce nom de groupe existe déjà.")
+            return super().form_invalid(form)
+
+
+class GroupCreateView(LoginRequiredMixin, GroupMixin, GroupIntegrityMixin, CreateView):
     def form_valid(self, form):
         form.instance.owner = self.request.user
         return super().form_valid(form)
 
 
-class GroupUpdateView(OwnerFilterMixin, GroupMixin, UpdateView):
+class GroupUpdateView(OwnerFilterMixin, GroupMixin, GroupIntegrityMixin, UpdateView):
     pass
 
 
@@ -79,14 +89,26 @@ class GroupAddMusicView(MemberFilterMixin, SingleObjectMixin, View):
         group = self.get_object()
         yt_id = request.POST.get("yt_id")
         if not yt_id:
-            return JsonResponse({"error": "You must provide a YouTube ID."}, status=400)
+            messages.add_message(request, messages.ERROR, "Aucun identifiant donné")
+            return redirect(group)
         yt_id = utils.parse_musik(yt_id)
 
         title = utils.get_yt_title(yt_id)
         if not title:
-            return JsonResponse({"error": "Invalid YouTube ID."}, status=400)
+            messages.add_message(
+                request, messages.ERROR, f"Vidéo Youtube invalide : {yt_id}"
+            )
+            return redirect(group)
+        try:
             group.musicvideo_set.create(yt_id=yt_id, title=title, owner=request.user)
-        group.save()
+        except IntegrityError:
+            messages.add_message(
+                request, messages.ERROR, f"Vidéo Youtube déjà ajoutée : {yt_id}"
+            )
+
+        messages.add_message(
+            request, messages.SUCCESS, f"Vidéo Youtube ajoutée : {yt_id}"
+        )
         return redirect(group)
 
 
@@ -97,6 +119,15 @@ class GroupAddMemberView(OwnerFilterMixin, SingleObjectMixin, View):
         group = self.get_object()
         username = request.POST.get("username")
         user = User.objects.get(username=username)
+        if user == group.owner:
+            messages.add_message(
+                request, messages.WARNING, f"{user} est le propriétaire du groupe."
+            )
+            return redirect(group)
+        if user in group.members.all():
+            messages.add_message(
+                request, messages.WARNING, f"{user} est déjà membre du groupe."
+            )
 
         group.members.add(user)
         return redirect(group)
@@ -112,17 +143,25 @@ class GroupRemoveMusicView(OwnerFilterMixin, SingleObjectMixin, View):
         return redirect(group)
 
 
-class GroupRemoveMemberView(View):
-    def get(self, request, pk, user_pk):
-        relation = get_object_or_404(
-            models.Group.members.through,
-            group_id=pk,
-            user_id=user_pk,
-            group__owner=request.user,
-        )
+class GroupRemoveMemberView(OwnerFilterMixin, SingleObjectMixin, View):
+    model = models.Group
 
-        group = relation.group
+    def get(self, request, pk, user_pk):
+        group = self.get_object()
+        user = User.objects.get(pk=user_pk)
+
+        relation = models.Group.members.through.objects.filter(
+            group=group, user=user
+        ).first()
+        if not relation:
+            messages.add_message(
+                request,
+                messages.ERROR,
+                f"L'utilisateur {user} n'est pas membre du groupe.",
+            )
+        else:
             relation.delete()
+
         return redirect(group)
 
 
@@ -137,6 +176,11 @@ class GroupRemoveGameView(SingleObjectMixin, SuccessMessageMixin, View):
         game = self.get_object()
         group = game.group
         game.delete()
+        messages.add_message(
+            request,
+            messages.SUCCESS,
+            f"Le jeu du {game.date.strftime('%x')} a été supprimé avec succès.",
+        )
         return redirect(group)
 
 
@@ -250,9 +294,11 @@ class YoutubeLoginView(LoginRequiredMixin, View):
 
 class YoutubeCallbackView(LoginRequiredMixin, View):
     def get(self, request):
-        if request.GET.get("error"):
+        if err := request.GET.get("error"):
+            messages.add_message(
+                request, messages.ERROR, f"Échec de la connexion à Youtube : {err}"
+            )
             return redirect("/")
-        print(request.GET)
 
         state = self.request.session.get("state")
         flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
@@ -278,6 +324,8 @@ class YoutubeCallbackView(LoginRequiredMixin, View):
                 }
             },
         )
+
+        messages.add_message(request, messages.SUCCESS, "Connexion à Youtube réussie.")
         return redirect("/")
 
 
@@ -287,4 +335,5 @@ class GroupClearBlacklistView(OwnerFilterMixin, SingleObjectMixin, View):
     def get(self, request, pk):
         group = self.get_object()
         group.musicvideo_set.filter(blacklisted=True).update(blacklisted=False)
+        messages.add_message(request, messages.SUCCESS, "La blacklist a été vidée.")
         return redirect(group)