[FA-27] Need to test events but seems to mostly work

FictionArchive.Service.UserNovelDataService/Services/EventHandlers/ChapterCreatedEventHandler.cs

@@ -0,0 +1,53 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.Services.EventHandlers;
+
+public class ChapterCreatedEventHandler : IIntegrationEventHandler<ChapterCreatedEvent>
+{
+    private readonly UserNovelDataServiceDbContext _dbContext;
+    private readonly ILogger<ChapterCreatedEventHandler> _logger;
+
+    public ChapterCreatedEventHandler(
+        UserNovelDataServiceDbContext dbContext,
+        ILogger<ChapterCreatedEventHandler> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    public async Task Handle(ChapterCreatedEvent @event)
+    {
+        // Ensure novel exists
+        var novelExists = await _dbContext.Novels.AnyAsync(n => n.Id == @event.NovelId);
+        if (!novelExists)
+        {
+            var novel = new Novel { Id = @event.NovelId };
+            _dbContext.Novels.Add(novel);
+        }
+
+        // Ensure volume exists
+        var volumeExists = await _dbContext.Volumes.AnyAsync(v => v.Id == @event.VolumeId);
+        if (!volumeExists)
+        {
+            var volume = new Volume { Id = @event.VolumeId };
+            _dbContext.Volumes.Add(volume);
+        }
+
+        // Create chapter if not exists
+        var chapterExists = await _dbContext.Chapters.AnyAsync(c => c.Id == @event.ChapterId);
+        if (chapterExists)
+        {
+            _logger.LogDebug("Chapter {ChapterId} already exists, skipping", @event.ChapterId);
+            return;
+        }
+
+        var chapter = new Chapter { Id = @event.ChapterId };
+        _dbContext.Chapters.Add(chapter);
+        await _dbContext.SaveChangesAsync();
+
+        _logger.LogInformation("Created chapter stub for {ChapterId} in novel {NovelId}", @event.ChapterId, @event.NovelId);
+    }
+}

FictionArchive.Service.UserNovelDataService/Services/EventHandlers/NovelCreatedEventHandler.cs

@@ -0,0 +1,36 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.Services.EventHandlers;
+
+public class NovelCreatedEventHandler : IIntegrationEventHandler<NovelCreatedEvent>
+{
+    private readonly UserNovelDataServiceDbContext _dbContext;
+    private readonly ILogger<NovelCreatedEventHandler> _logger;
+
+    public NovelCreatedEventHandler(
+        UserNovelDataServiceDbContext dbContext,
+        ILogger<NovelCreatedEventHandler> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    public async Task Handle(NovelCreatedEvent @event)
+    {
+        var exists = await _dbContext.Novels.AnyAsync(n => n.Id == @event.NovelId);
+        if (exists)
+        {
+            _logger.LogDebug("Novel {NovelId} already exists, skipping", @event.NovelId);
+            return;
+        }
+
+        var novel = new Novel { Id = @event.NovelId };
+        _dbContext.Novels.Add(novel);
+        await _dbContext.SaveChangesAsync();
+
+        _logger.LogInformation("Created novel stub for {NovelId}", @event.NovelId);
+    }
+}

FictionArchive.Service.UserNovelDataService/Services/EventHandlers/UserInvitedEventHandler.cs

@@ -0,0 +1,40 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.UserNovelDataService.Models.Database;
+using FictionArchive.Service.UserNovelDataService.Models.IntegrationEvents;
+using Microsoft.EntityFrameworkCore;
+
+namespace FictionArchive.Service.UserNovelDataService.Services.EventHandlers;
+
+public class UserInvitedEventHandler : IIntegrationEventHandler<UserInvitedEvent>
+{
+    private readonly UserNovelDataServiceDbContext _dbContext;
+    private readonly ILogger<UserInvitedEventHandler> _logger;
+
+    public UserInvitedEventHandler(
+        UserNovelDataServiceDbContext dbContext,
+        ILogger<UserInvitedEventHandler> logger)
+    {
+        _dbContext = dbContext;
+        _logger = logger;
+    }
+
+    public async Task Handle(UserInvitedEvent @event)
+    {
+        var exists = await _dbContext.Users.AnyAsync(u => u.Id == @event.InvitedUserId);
+        if (exists)
+        {
+            _logger.LogDebug("User {UserId} already exists, skipping", @event.InvitedUserId);
+            return;
+        }
+
+        var user = new User
+        {
+            Id = @event.InvitedUserId,
+            OAuthProviderId = @event.InvitedOAuthProviderId
+        };
+        _dbContext.Users.Add(user);
+        await _dbContext.SaveChangesAsync();
+
+        _logger.LogInformation("Created user stub for {UserId}", @event.InvitedUserId);
+    }
+}

FictionArchive.Service.UserNovelDataService/Services/UserNovelDataServiceDbContext.cs

@@ -8,6 +8,9 @@ public class UserNovelDataServiceDbContext : FictionArchiveDbContext
 {
     public DbSet<User> Users { get; set; }
     public DbSet<Bookmark> Bookmarks { get; set; }
+    public DbSet<Novel> Novels { get; set; }
+    public DbSet<Volume> Volumes { get; set; }
+    public DbSet<Chapter> Chapters { get; set; }
 
     public UserNovelDataServiceDbContext(DbContextOptions options, ILogger<UserNovelDataServiceDbContext> logger) : base(options, logger)
     {