first commit

internal/database/migrate.go

@@ -0,0 +1,32 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+)
+
+// Migrate creates the tables this application needs, if they don't already
+// exist. This is intentionally the simplest possible approach
+// (CREATE TABLE IF NOT EXISTS run on every startup) and is fine for a
+// learning project with a single table.
+//
+// For a real production project you'd want a proper migration tool (e.g.
+// golang-migrate/migrate) that tracks a version number, supports
+// incremental "up"/"down" migrations, and can safely evolve a schema that
+// already has production data in it. This function is a deliberate
+// shortcut around that complexity for now.
+func Migrate(ctx context.Context, db *sql.DB) error {
+	_, err := db.ExecContext(ctx, `
+		CREATE TABLE IF NOT EXISTS users (
+			id            INT AUTO_INCREMENT PRIMARY KEY,
+			email         VARCHAR(255) NOT NULL UNIQUE,
+			password_hash VARCHAR(255) NOT NULL DEFAULT '',
+			google_id     VARCHAR(255) NOT NULL DEFAULT '',
+			created_at    DATETIME NOT NULL
+		)`)
+	if err != nil {
+		return fmt.Errorf("migrate users table: %w", err)
+	}
+	return nil
+}