Initial commit: GM-Relay Telegram Bot

src/GmRelay.Bot/Infrastructure/Database/DbMigrator.cs

@@ -0,0 +1,40 @@
+using System.Reflection;
+using DbUp;
+
+namespace GmRelay.Bot.Infrastructure.Database;
+
+/// <summary>
+/// Runs embedded SQL migrations via DbUp on application startup.
+/// Scripts are embedded as resources from the Migrations/ folder.
+/// NOTE: We read the connection string from IConfiguration directly,
+/// because NpgsqlDataSource.ConnectionString strips the password by default.
+/// </summary>
+public sealed class DbMigrator(IConfiguration configuration, ILogger<DbMigrator> logger)
+{
+    public void MigrateUp()
+    {
+        var connectionString = configuration.GetConnectionString("gmrelaydb")
+            ?? throw new InvalidOperationException("ConnectionStrings:gmrelaydb is required.");
+
+        EnsureDatabase.For.PostgresqlDatabase(connectionString);
+
+        var upgrader = DeployChanges.To
+            .PostgresqlDatabase(connectionString)
+            .WithScriptsEmbeddedInAssembly(Assembly.GetExecutingAssembly(), s => s.Contains(".Migrations."))
+            .WithTransactionPerScript()
+            .LogToConsole()
+            .Build();
+
+        var result = upgrader.PerformUpgrade();
+
+        if (!result.Successful)
+        {
+            var ex = result.Error;
+            logger.LogCritical(ex, "Database migration failed");
+            throw ex;
+        }
+
+        var count = result.Scripts.Count();
+        logger.LogInformation("Database migrations applied successfully. {Count} scripts executed", count);
+    }
+}