feat: implement notification system with repository, service, and controller layers

2026-10-20 16:45:48 +05:30
parent 28c465f59b
commit d1c3d4e22f
10 changed files with 656 additions and 0 deletions
@@ -0,0 +1,53 @@
+namespace Distribution.Features.Notifications;
+
+public class NotificationRecipientResolver(INotificationRepository repo)
+{
+    /// <summary>
+    /// Expands the rules into a de-duplicated list of active user ids, never including
+    /// <paramref name="actingUserId"/>.
+    /// </summary>
+    public async Task<List<Guid>> ResolveAsync(IEnumerable<RecipientRule> rules, Guid? actingUserId)
+    {
+        var ids = new HashSet<Guid>();
+
+        foreach (var rule in rules)
+            ids.UnionWith(await ResolveRuleAsync(rule));
+
+        if (actingUserId is { } actor)
+            ids.Remove(actor);
+
+        if (ids.Count == 0) return [];
+        return await repo.FilterActiveUserIdsAsync(ids);
+    }
+
+    private async Task<IEnumerable<Guid>> ResolveRuleAsync(RecipientRule rule)
+    {
+        switch (rule)
+        {
+            case UsersRule r:
+                return r.Ids;
+
+            case PermissionRule r:
+                return await repo.GetUserIdsByPermissionAsync(r.Code);
+
+            case ScopeRule r:
+                return await repo.GetUserIdsByScopeAsync(r.Kind, r.Id);
+
+            case PermissionInScopeRule r:
+                var withPermission = await repo.GetUserIdsByPermissionAsync(r.Code);
+                var inScope = await repo.GetUserIdsByScopeAsync(r.Kind, r.Id);
+                return withPermission.Intersect(inScope);
+
+            case ReportsToRule r:
+                var supervisor = await repo.GetReportsToUserIdAsync(r.UserId);
+                return supervisor is { } s ? [s] : [];
+
+            case RouteOwnerRule r:
+                var owner = await repo.GetRouteOwnerUserIdAsync(r.Kind, r.Id);
+                return owner is { } o ? [o] : [];
+
+            default:
+                throw new NotSupportedException($"Unknown recipient rule {rule.GetType().Name}.");
+        }
+    }
+}