feat: work on setting up database

src/SanctionsSearch.Worker/Persistence/AppDbContext.cs

@@ -0,0 +1,40 @@
+using System.Reflection;
+
+using Microsoft.Data.Sqlite;
+
+namespace SanctionsSearch.Worker.Persistence;
+
+class AppDbContext(IOptionsSnapshot<DbOptions> options) : DbContext, IDisposable
+{
+  private readonly IOptionsSnapshot<DbOptions> _options = options;
+  private SqliteConnection? _connection;
+  public DbSet<Sdn> Sdns { get; set; } = default!;
+  public DbSet<Address> Addresses { get; set; } = default!;
+  public DbSet<Alias> Aliases { get; set; } = default!;
+  public DbSet<Comment> Comments { get; set; } = default!;
+
+  protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+  {
+    var folder = Environment.SpecialFolder.LocalApplicationData;
+    var path = Environment.GetFolderPath(folder);
+    var dataDir = Path.Combine(path, "SanctionsSearch", "Data");
+
+    if (Directory.Exists(dataDir) == false)
+    {
+      Directory.CreateDirectory(dataDir);
+    }
+
+    var dbPath = Path.Combine(dataDir, _options.Value.DatabaseName);
+
+    _connection = new SqliteConnection($"Data Source={dbPath}");
+    _connection.Open();
+
+    optionsBuilder.UseSqlite(_connection);
+  }
+
+  public override void Dispose()
+  {
+    _connection?.Dispose();
+    base.Dispose();
+  }
+}