291 lines
11 KiB
C#
291 lines
11 KiB
C#
using System.Linq.Expressions;
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using System.Reflection;
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using DysonNetwork.Shared.Models;
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using DysonNetwork.Sphere.WebReader;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Design;
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using Microsoft.EntityFrameworkCore.Query;
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using NodaTime;
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using Quartz;
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namespace DysonNetwork.Sphere;
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public interface IIdentifiedResource
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{
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public string ResourceIdentifier { get; }
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}
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public class AppDatabase(
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DbContextOptions<AppDatabase> options,
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IConfiguration configuration
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) : DbContext(options)
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{
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public DbSet<SnPublisher> Publishers { get; set; } = null!;
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public DbSet<SnPublisherMember> PublisherMembers { get; set; } = null!;
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public DbSet<SnPublisherSubscription> PublisherSubscriptions { get; set; } = null!;
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public DbSet<SnPublisherFeature> PublisherFeatures { get; set; } = null!;
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public DbSet<SnPost> Posts { get; set; } = null!;
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public DbSet<SnPostReaction> PostReactions { get; set; } = null!;
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public DbSet<SnPostAward> PostAwards { get; set; } = null!;
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public DbSet<SnPostTag> PostTags { get; set; } = null!;
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public DbSet<SnPostCategory> PostCategories { get; set; } = null!;
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public DbSet<SnPostCollection> PostCollections { get; set; } = null!;
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public DbSet<SnPostFeaturedRecord> PostFeaturedRecords { get; set; } = null!;
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public DbSet<SnPostCategorySubscription> PostCategorySubscriptions { get; set; } = null!;
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public DbSet<SnPoll> Polls { get; set; } = null!;
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public DbSet<SnPollQuestion> PollQuestions { get; set; } = null!;
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public DbSet<SnPollAnswer> PollAnswers { get; set; } = null!;
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public DbSet<SnChatRoom> ChatRooms { get; set; } = null!;
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public DbSet<SnChatMember> ChatMembers { get; set; } = null!;
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public DbSet<SnChatMessage> ChatMessages { get; set; } = null!;
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public DbSet<SnRealtimeCall> ChatRealtimeCall { get; set; } = null!;
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public DbSet<SnChatMessageReaction> ChatReactions { get; set; } = null!;
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public DbSet<SnSticker> Stickers { get; set; } = null!;
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public DbSet<StickerPack> StickerPacks { get; set; } = null!;
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public DbSet<StickerPackOwnership> StickerPackOwnerships { get; set; } = null!;
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public DbSet<WebArticle> WebArticles { get; set; } = null!;
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public DbSet<WebFeed> WebFeeds { get; set; } = null!;
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public DbSet<WebFeedSubscription> WebFeedSubscriptions { get; set; } = null!;
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protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
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{
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optionsBuilder.UseNpgsql(
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configuration.GetConnectionString("App"),
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opt => opt
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.ConfigureDataSource(optSource => optSource.EnableDynamicJson())
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.UseQuerySplittingBehavior(QuerySplittingBehavior.SplitQuery)
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.UseNodaTime()
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).UseSnakeCaseNamingConvention();
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base.OnConfiguring(optionsBuilder);
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}
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protected override void OnModelCreating(ModelBuilder modelBuilder)
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{
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base.OnModelCreating(modelBuilder);
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modelBuilder.Entity<SnPublisherMember>()
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.HasKey(pm => new { pm.PublisherId, pm.AccountId });
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modelBuilder.Entity<SnPublisherMember>()
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.HasOne(pm => pm.Publisher)
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.WithMany(p => p.Members)
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.HasForeignKey(pm => pm.PublisherId)
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.OnDelete(DeleteBehavior.Cascade);
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modelBuilder.Entity<SnPublisherSubscription>()
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.HasOne(ps => ps.Publisher)
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.WithMany(p => p.Subscriptions)
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.HasForeignKey(ps => ps.PublisherId)
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.OnDelete(DeleteBehavior.Cascade);
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modelBuilder.Entity<SnPost>()
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.HasGeneratedTsVectorColumn(p => p.SearchVector, "simple", p => new { p.Title, p.Description, p.Content })
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.HasIndex(p => p.SearchVector)
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.HasMethod("GIN");
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modelBuilder.Entity<SnPost>()
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.HasOne(p => p.RepliedPost)
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.WithMany()
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.HasForeignKey(p => p.RepliedPostId)
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.OnDelete(DeleteBehavior.Restrict);
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modelBuilder.Entity<SnPost>()
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.HasOne(p => p.ForwardedPost)
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.WithMany()
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.HasForeignKey(p => p.ForwardedPostId)
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.OnDelete(DeleteBehavior.Restrict);
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modelBuilder.Entity<SnPost>()
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.HasMany(p => p.Tags)
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.WithMany(t => t.Posts)
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.UsingEntity(j => j.ToTable("post_tag_links"));
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modelBuilder.Entity<SnPost>()
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.HasMany(p => p.Categories)
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.WithMany(c => c.Posts)
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.UsingEntity(j => j.ToTable("post_category_links"));
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modelBuilder.Entity<SnPost>()
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.HasMany(p => p.Collections)
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.WithMany(c => c.Posts)
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.UsingEntity(j => j.ToTable("post_collection_links"));
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modelBuilder.Entity<SnChatMember>()
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.HasKey(pm => new { pm.Id });
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modelBuilder.Entity<SnChatMember>()
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.HasAlternateKey(pm => new { pm.ChatRoomId, pm.AccountId });
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modelBuilder.Entity<SnChatMember>()
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.HasOne(pm => pm.ChatRoom)
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.WithMany(p => p.Members)
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.HasForeignKey(pm => pm.ChatRoomId)
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.OnDelete(DeleteBehavior.Cascade);
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modelBuilder.Entity<SnChatMessage>()
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.HasOne(m => m.ForwardedMessage)
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.WithMany()
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.HasForeignKey(m => m.ForwardedMessageId)
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.OnDelete(DeleteBehavior.Restrict);
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modelBuilder.Entity<SnChatMessage>()
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.HasOne(m => m.RepliedMessage)
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.WithMany()
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.HasForeignKey(m => m.RepliedMessageId)
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.OnDelete(DeleteBehavior.Restrict);
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modelBuilder.Entity<SnRealtimeCall>()
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.HasOne(m => m.Room)
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.WithMany()
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.HasForeignKey(m => m.RoomId)
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.OnDelete(DeleteBehavior.Cascade);
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modelBuilder.Entity<SnRealtimeCall>()
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.HasOne(m => m.Sender)
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.WithMany()
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.HasForeignKey(m => m.SenderId)
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.OnDelete(DeleteBehavior.Cascade);
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modelBuilder.Entity<WebFeed>()
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.HasIndex(f => f.Url)
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.IsUnique();
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modelBuilder.Entity<WebArticle>()
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.HasIndex(a => a.Url)
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.IsUnique();
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// Automatically apply soft-delete filter to all entities inheriting BaseModel
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foreach (var entityType in modelBuilder.Model.GetEntityTypes())
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{
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if (!typeof(ModelBase).IsAssignableFrom(entityType.ClrType)) continue;
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var method = typeof(AppDatabase)
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.GetMethod(nameof(SetSoftDeleteFilter),
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BindingFlags.NonPublic | BindingFlags.Static)!
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.MakeGenericMethod(entityType.ClrType);
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method.Invoke(null, [modelBuilder]);
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}
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}
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private static void SetSoftDeleteFilter<TEntity>(ModelBuilder modelBuilder)
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where TEntity : ModelBase
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{
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modelBuilder.Entity<TEntity>().HasQueryFilter(e => e.DeletedAt == null);
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}
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public override async Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
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{
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var now = SystemClock.Instance.GetCurrentInstant();
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foreach (var entry in ChangeTracker.Entries<ModelBase>())
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{
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switch (entry.State)
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{
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case EntityState.Added:
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entry.Entity.CreatedAt = now;
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entry.Entity.UpdatedAt = now;
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break;
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case EntityState.Modified:
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entry.Entity.UpdatedAt = now;
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break;
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case EntityState.Deleted:
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entry.State = EntityState.Modified;
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entry.Entity.DeletedAt = now;
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break;
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case EntityState.Detached:
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case EntityState.Unchanged:
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default:
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break;
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}
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}
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return await base.SaveChangesAsync(cancellationToken);
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}
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}
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public class AppDatabaseRecyclingJob(AppDatabase db, ILogger<AppDatabaseRecyclingJob> logger) : IJob
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{
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public async Task Execute(IJobExecutionContext context)
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{
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var now = SystemClock.Instance.GetCurrentInstant();
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logger.LogInformation("Deleting soft-deleted records...");
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var threshold = now - Duration.FromDays(7);
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var entityTypes = db.Model.GetEntityTypes()
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.Where(t => typeof(ModelBase).IsAssignableFrom(t.ClrType) && t.ClrType != typeof(ModelBase))
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.Select(t => t.ClrType);
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foreach (var entityType in entityTypes)
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{
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var set = (IQueryable)db.GetType().GetMethod(nameof(DbContext.Set), Type.EmptyTypes)!
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.MakeGenericMethod(entityType).Invoke(db, null)!;
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var parameter = Expression.Parameter(entityType, "e");
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var property = Expression.Property(parameter, nameof(ModelBase.DeletedAt));
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var condition = Expression.LessThan(property, Expression.Constant(threshold, typeof(Instant?)));
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var notNull = Expression.NotEqual(property, Expression.Constant(null, typeof(Instant?)));
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var finalCondition = Expression.AndAlso(notNull, condition);
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var lambda = Expression.Lambda(finalCondition, parameter);
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var queryable = set.Provider.CreateQuery(
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Expression.Call(
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typeof(Queryable),
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"Where",
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[entityType],
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set.Expression,
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Expression.Quote(lambda)
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)
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);
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var toListAsync = typeof(EntityFrameworkQueryableExtensions)
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.GetMethod(nameof(EntityFrameworkQueryableExtensions.ToListAsync))!
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.MakeGenericMethod(entityType);
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var items = await (dynamic)toListAsync.Invoke(null, [queryable, CancellationToken.None])!;
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db.RemoveRange(items);
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}
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await db.SaveChangesAsync();
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}
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}
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public class AppDatabaseFactory : IDesignTimeDbContextFactory<AppDatabase>
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{
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public AppDatabase CreateDbContext(string[] args)
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{
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var configuration = new ConfigurationBuilder()
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.SetBasePath(Directory.GetCurrentDirectory())
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.AddJsonFile("appsettings.json")
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.Build();
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var optionsBuilder = new DbContextOptionsBuilder<AppDatabase>();
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return new AppDatabase(optionsBuilder.Options, configuration);
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}
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}
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public static class OptionalQueryExtensions
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{
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public static IQueryable<T> If<T>(
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this IQueryable<T> source,
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bool condition,
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Func<IQueryable<T>, IQueryable<T>> transform
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)
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{
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return condition ? transform(source) : source;
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}
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public static IQueryable<T> If<T, TP>(
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this IIncludableQueryable<T, TP> source,
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bool condition,
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Func<IIncludableQueryable<T, TP>, IQueryable<T>> transform
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)
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where T : class
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{
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return condition ? transform(source) : source;
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}
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public static IQueryable<T> If<T, TP>(
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this IIncludableQueryable<T, IEnumerable<TP>> source,
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bool condition,
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Func<IIncludableQueryable<T, IEnumerable<TP>>, IQueryable<T>> transform
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)
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where T : class
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{
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return condition ? transform(source) : source;
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}
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}
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