Foxchat.NET/Foxchat.Identity/Database/IdentityContext.cs

using Foxchat.Core;
using Foxchat.Core.Database;
using Foxchat.Identity.Database.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;

namespace Foxchat.Identity.Database;

public class IdentityContext : IDatabaseContext
{
    private readonly string _connString;

    public DbSet<Account> Accounts { get; set; }
    public DbSet<ChatInstance> ChatInstances { get; set; }
    public override DbSet<Instance> Instance { get; set; }
    public DbSet<Token> Tokens { get; set; }
    public DbSet<GuildAccount> GuildAccounts { get; set; }

    public IdentityContext(InstanceConfig config)
    {
        _connString = new Npgsql.NpgsqlConnectionStringBuilder(config.Database.Url)
        {
            Timeout = config.Database.Timeout ?? 5,
            MaxPoolSize = config.Database.MaxPoolSize ?? 50,
        }.ConnectionString;
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
            => optionsBuilder
                .UseNpgsql(_connString)
                .UseSnakeCaseNamingConvention();

    protected override void ConfigureConventions(ModelConfigurationBuilder configurationBuilder)
    {
        // ULIDs are stored as UUIDs in the database
        configurationBuilder.Properties<Ulid>().HaveConversion<UlidConverter>();
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Account>().HasIndex(a => a.Username).IsUnique();
        modelBuilder.Entity<Account>().HasIndex(a => a.Email).IsUnique();

        modelBuilder.Entity<ChatInstance>().HasIndex(i => i.Domain).IsUnique();

        modelBuilder.Entity<GuildAccount>().HasKey(g => new { g.ChatInstanceId, g.GuildId, g.AccountId });
    }
}

public class DesignTimeIdentityContextFactory : IDesignTimeDbContextFactory<IdentityContext>
{
    public IdentityContext CreateDbContext(string[] args)
    {
        // Read the configuration file
        var config = new ConfigurationBuilder()
            .AddConfiguration("identity.ini")
            .Build()
            // Get the configuration as our config class
            .Get<InstanceConfig>() ?? new();

        return new IdentityContext(config);
    }
}