feat(submissions): auto-replace player in scopes, cancel sync + info about the sync

polylan_submitter/submissions/admin.py

@@ -1,6 +1,7 @@
 from django.contrib import admin
 from django.urls import reverse
 from .models import Submission, SubmissionFile, ImageCrop, Scope
+from .signals import broadcast_scope_updates
 
 
 class ImageCropInline(admin.TabularInline):
@@ -77,6 +78,45 @@ class ScopeAdmin(admin.ModelAdmin):
             },
         )
 
+    # Players on a scope edited here get moved like with the AAndT sync (see
+    # broadcast_scope_updates): state before the save is kept on the instance,
+    # compared once the assigned users (m2m) are saved too in save_related.
+    def save_model(self, request, obj, form, change):
+        previous = Scope.objects.filter(pk=obj.pk).first() if change else None
+        obj._state_before_save = (
+            (
+                previous.is_active,
+                set(previous.assigned_users.values_list("id", flat=True)),
+            )
+            if previous
+            else (False, set())
+        )
+        super().save_model(request, obj, form, change)
+
+    def save_related(self, request, form, formsets, change):
+        super().save_related(request, form, formsets, change)
+
+        scope = form.instance
+        was_active, previous_user_ids = scope._state_before_save
+        user_ids = set(scope.assigned_users.values_list("id", flat=True))
+
+        if scope.is_active != was_active or user_ids != previous_user_ids:
+            broadcast_scope_updates({scope: user_ids | previous_user_ids})
+
+    def delete_model(self, request, obj):
+        self.delete_queryset(request, Scope.objects.filter(pk=obj.pk))
+
+    def delete_queryset(self, request, queryset):
+        changes = {
+            scope: {user.id for user in scope.assigned_users.all()}
+            for scope in queryset.prefetch_related("assigned_users")
+        }
+        for scope in changes:
+            scope.is_active = False
+
+        super().delete_queryset(request, queryset)
+        broadcast_scope_updates(changes)
+
 
 @admin.register(Submission)
 class SubmissionAdmin(admin.ModelAdmin):