feat: добавил личные уведомления для пользователей

Реализовал хранение, получение и отметку прочитанными пользовательских уведомлений. Обновил фронтенд для отображения и управления уведомлениями в профиле студента.

backend/UniVerse.Infrastructure/Data/AppDbContext.cs

@@ -23,6 +23,7 @@ public class AppDbContext : DbContext
     public DbSet<Achievement> Achievements { get; set; } = null!;
     public DbSet<UserAchievement> UserAchievements { get; set; } = null!;
     public DbSet<CoinTransaction> CoinTransactions { get; set; } = null!;
+    public DbSet<UserNotification> UserNotifications { get; set; } = null!;
     public DbSet<RefreshToken> RefreshTokens { get; set; } = null!;
 
     static AppDbContext()

backend/UniVerse.Infrastructure/Data/Configurations/UserNotificationConfiguration.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using UniVerse.Domain.Entities;
+
+namespace UniVerse.Infrastructure.Data.Configurations;
+
+public class UserNotificationConfiguration : IEntityTypeConfiguration<UserNotification>
+{
+    public void Configure(EntityTypeBuilder<UserNotification> builder)
+    {
+        builder.ToTable("user_notifications");
+
+        builder.HasKey(n => n.Id);
+        builder.Property(n => n.Id).HasColumnName("id");
+        builder.Property(n => n.UserId).HasColumnName("user_id");
+        builder.Property(n => n.Type).HasColumnName("type").HasMaxLength(50).IsRequired();
+        builder.Property(n => n.Title).HasColumnName("title").HasMaxLength(255).IsRequired();
+        builder.Property(n => n.Body).HasColumnName("body").HasMaxLength(1000).IsRequired();
+        builder.Property(n => n.IsRead).HasColumnName("is_read").HasDefaultValue(false);
+        builder.Property(n => n.CreatedAt).HasColumnName("created_at").HasDefaultValueSql("NOW()");
+
+        builder.HasOne(n => n.User)
+            .WithMany(u => u.Notifications)
+            .HasForeignKey(n => n.UserId)
+            .OnDelete(DeleteBehavior.Cascade);
+
+        builder.HasIndex(n => new { n.UserId, n.CreatedAt });
+    }
+}

backend/UniVerse.Infrastructure/Migrations/20260512123000_UserNotifications.cs

@@ -0,0 +1,54 @@
+using System;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using UniVerse.Infrastructure.Data;
+
+#nullable disable
+
+namespace UniVerse.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    [DbContext(typeof(AppDbContext))]
+    [Migration("20260512123000_UserNotifications")]
+    public partial class UserNotifications : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "user_notifications",
+                columns: table => new
+                {
+                    id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", Npgsql.EntityFrameworkCore.PostgreSQL.Metadata.NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    user_id = table.Column<int>(type: "integer", nullable: false),
+                    type = table.Column<string>(type: "character varying(50)", maxLength: 50, nullable: false),
+                    title = table.Column<string>(type: "character varying(255)", maxLength: 255, nullable: false),
+                    body = table.Column<string>(type: "character varying(1000)", maxLength: 1000, nullable: false),
+                    is_read = table.Column<bool>(type: "boolean", nullable: false, defaultValue: false),
+                    created_at = table.Column<DateTime>(type: "timestamp with time zone", nullable: false, defaultValueSql: "NOW()")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_user_notifications", x => x.id);
+                    table.ForeignKey(
+                        name: "FK_user_notifications_users_user_id",
+                        column: x => x.user_id,
+                        principalTable: "users",
+                        principalColumn: "id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_user_notifications_user_id_created_at",
+                table: "user_notifications",
+                columns: new[] { "user_id", "created_at" });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(name: "user_notifications");
+        }
+    }
+}

backend/UniVerse.Infrastructure/Migrations/AppDbContextModelSnapshot.cs

@@ -721,6 +721,56 @@ namespace UniVerse.Infrastructure.Migrations
                     b.ToTable("user_achievements", (string)null);
                 });
 
+            modelBuilder.Entity("UniVerse.Domain.Entities.UserNotification", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasColumnName("id");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Body")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("character varying(1000)")
+                        .HasColumnName("body");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("created_at")
+                        .HasDefaultValueSql("NOW()");
+
+                    b.Property<bool>("IsRead")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("is_read");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)")
+                        .HasColumnName("title");
+
+                    b.Property<string>("Type")
+                        .IsRequired()
+                        .HasMaxLength(50)
+                        .HasColumnType("character varying(50)")
+                        .HasColumnName("type");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("integer")
+                        .HasColumnName("user_id");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId", "CreatedAt");
+
+                    b.ToTable("user_notifications", (string)null);
+                });
+
             modelBuilder.Entity("UniVerse.Domain.Entities.UserRoleAssignment", b =>
                 {
                     b.Property<int>("UserId")
@@ -905,6 +955,17 @@ namespace UniVerse.Infrastructure.Migrations
                     b.Navigation("User");
                 });
 
+            modelBuilder.Entity("UniVerse.Domain.Entities.UserNotification", b =>
+                {
+                    b.HasOne("UniVerse.Domain.Entities.User", "User")
+                        .WithMany("Notifications")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
             modelBuilder.Entity("UniVerse.Domain.Entities.UserRoleAssignment", b =>
                 {
                     b.HasOne("UniVerse.Domain.Entities.User", "User")
@@ -958,6 +1019,8 @@ namespace UniVerse.Infrastructure.Migrations
 
                     b.Navigation("Enrollments");
 
+                    b.Navigation("Notifications");
+
                     b.Navigation("RefreshTokens");
 
                     b.Navigation("Reviews");

backend/UniVerse.Infrastructure/Notifications/NotificationService.cs

@@ -1,20 +1,27 @@
 using Microsoft.Extensions.Logging;
+using Microsoft.EntityFrameworkCore;
+using UniVerse.Application.DTOs.Common;
 using UniVerse.Application.DTOs.Notifications;
 using UniVerse.Application.Interfaces;
+using UniVerse.Domain.Entities;
+using UniVerse.Infrastructure.Data;
 
 namespace UniVerse.Infrastructure.Notifications;
 
 public class NotificationService : INotificationService
 {
+    private readonly AppDbContext _db;
     private readonly IEnumerable<INotificationProvider> _providers;
     private readonly INotificationScheduler _scheduler;
     private readonly ILogger<NotificationService> _logger;
 
     public NotificationService(
+        AppDbContext db,
         IEnumerable<INotificationProvider> providers,
         INotificationScheduler scheduler,
         ILogger<NotificationService> logger)
     {
+        _db = db;
         _providers = providers;
         _scheduler = scheduler;
         _logger = logger;
@@ -46,4 +53,68 @@ public class NotificationService : INotificationService
 
         return _scheduler.ScheduleAsync(message, request.SendAt, cancellationToken);
     }
+
+    public async Task<UserNotificationDto> CreateUserNotificationAsync(
+        int userId,
+        string type,
+        string title,
+        string body,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(type);
+        ArgumentException.ThrowIfNullOrWhiteSpace(title);
+        ArgumentException.ThrowIfNullOrWhiteSpace(body);
+
+        var notification = new UserNotification
+        {
+            UserId = userId,
+            Type = type,
+            Title = title,
+            Body = body
+        };
+
+        _db.UserNotifications.Add(notification);
+        await _db.SaveChangesAsync(cancellationToken);
+
+        return ToDto(notification);
+    }
+
+    public async Task<PagedResult<UserNotificationDto>> GetUserNotificationsAsync(
+        int userId,
+        PaginationRequest pagination,
+        CancellationToken cancellationToken = default)
+    {
+        var query = _db.UserNotifications.Where(n => n.UserId == userId);
+        var total = await query.CountAsync(cancellationToken);
+        var items = await query
+            .OrderByDescending(n => n.CreatedAt)
+            .Skip((pagination.Page - 1) * pagination.PageSize)
+            .Take(pagination.PageSize)
+            .Select(n => new UserNotificationDto(
+                n.Id,
+                n.Type,
+                n.Title,
+                n.Body,
+                n.IsRead,
+                n.CreatedAt))
+            .ToListAsync(cancellationToken);
+
+        return PagedResult<UserNotificationDto>.Create(items, total, pagination.Page, pagination.PageSize);
+    }
+
+    public async Task MarkAllReadAsync(int userId, CancellationToken cancellationToken = default)
+    {
+        await _db.UserNotifications
+            .Where(n => n.UserId == userId && !n.IsRead)
+            .ExecuteUpdateAsync(setters => setters.SetProperty(n => n.IsRead, true), cancellationToken);
+    }
+
+    private static UserNotificationDto ToDto(UserNotification notification) => new(
+        notification.Id,
+        notification.Type,
+        notification.Title,
+        notification.Body,
+        notification.IsRead,
+        notification.CreatedAt
+    );
 }

backend/UniVerse.Infrastructure/Services/GamificationService.cs

@@ -5,6 +5,7 @@ using System.Globalization;
 using UniVerse.Application.DTOs.Achievements;
 using UniVerse.Application.DTOs.Common;
 using UniVerse.Application.DTOs.Gamification;
+using UniVerse.Application.DTOs.Notifications;
 using UniVerse.Application.Interfaces;
 using UniVerse.Application.Mappings;
 using UniVerse.Domain.Entities;
@@ -17,11 +18,16 @@ public class GamificationService : IGamificationService
 {
     private readonly AppDbContext _db;
     private readonly IConfiguration _config;
+    private readonly INotificationService _notifications;
     private readonly ILogger<GamificationService> _logger;
 
-    public GamificationService(AppDbContext db, IConfiguration config, ILogger<GamificationService> logger)
+    public GamificationService(
+        AppDbContext db,
+        IConfiguration config,
+        INotificationService notifications,
+        ILogger<GamificationService> logger)
     {
-        _db = db; _config = config; _logger = logger;
+        _db = db; _config = config; _notifications = notifications; _logger = logger;
     }
 
     public async Task AwardCoinsAsync(int userId, int amount, CoinTransactionType type,
@@ -91,10 +97,43 @@ public class GamificationService : IGamificationService
                     achievementId: achievement.Id, description: $"Achievement: {achievement.Name}");
                 earnedCoins += achievement.CoinReward;
             }
+
+            await TryNotifyAchievementAsync(user, achievement);
         }
         await _db.SaveChangesAsync();
     }
 
+    private async Task TryNotifyAchievementAsync(User user, Achievement achievement)
+    {
+        try
+        {
+            var title = $"Новое достижение: {achievement.Name}";
+            var rewardText = achievement.CoinReward > 0
+                ? $" Награда: {achievement.CoinReward} монет."
+                : string.Empty;
+            var body = $"{achievement.Description ?? "Вы выполнили условие достижения."}{rewardText}";
+
+            await _notifications.CreateUserNotificationAsync(user.Id, "achievement", title, body);
+
+            await _notifications.SendAsync(new NotificationMessage(
+                NotificationChannels.Email,
+                user.Email,
+                title,
+                $"Здравствуйте, {user.DisplayName ?? user.Email}!\n\nПоздравляем: вы получили достижение «{achievement.Name}» в UniVerse.\n\n{body}",
+                user.DisplayName,
+                new Dictionary<string, string>
+                {
+                    ["event"] = "achievement_earned",
+                    ["achievement_id"] = achievement.Id.ToString(),
+                    ["achievement_name"] = achievement.Name
+                }));
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to send achievement notification {AchievementId} to user {UserId}", achievement.Id, user.Id);
+        }
+    }
+
     private static bool TryParseCondition(string? condition, out string type, out int value)
     {
         type = string.Empty;