feat: bootstrap foundation application

apps/server/internal/database/migrate.go

@@ -0,0 +1,98 @@
+package database
+
+import (
+	"context"
+	"database/sql"
+	"embed"
+	"fmt"
+	"io/fs"
+	"sort"
+	"strings"
+)
+
+//go:embed migrations/*.sql
+var migrationFiles embed.FS
+
+func ApplyMigrations(ctx context.Context, db *sql.DB) error {
+	if _, err := db.ExecContext(ctx, `
+		CREATE TABLE IF NOT EXISTS schema_migrations (
+			version TEXT PRIMARY KEY,
+			applied_at TEXT NOT NULL
+		);
+	`); err != nil {
+		return fmt.Errorf("ensure schema_migrations: %w", err)
+	}
+
+	entries, err := fs.ReadDir(migrationFiles, "migrations")
+	if err != nil {
+		return fmt.Errorf("read migrations: %w", err)
+	}
+
+	var names []string
+	for _, entry := range entries {
+		if entry.IsDir() || !strings.HasSuffix(entry.Name(), ".up.sql") {
+			continue
+		}
+		names = append(names, entry.Name())
+	}
+	sort.Strings(names)
+
+	for _, name := range names {
+		applied, err := migrationApplied(ctx, db, name)
+		if err != nil {
+			return err
+		}
+		if applied {
+			continue
+		}
+
+		body, err := migrationFiles.ReadFile("migrations/" + name)
+		if err != nil {
+			return fmt.Errorf("read migration %s: %w", name, err)
+		}
+
+		tx, err := db.BeginTx(ctx, nil)
+		if err != nil {
+			return fmt.Errorf("begin migration %s: %w", name, err)
+		}
+
+		for _, statement := range splitStatements(string(body)) {
+			if _, err := tx.ExecContext(ctx, statement); err != nil {
+				_ = tx.Rollback()
+				return fmt.Errorf("execute migration %s: %w", name, err)
+			}
+		}
+
+		if _, err := tx.ExecContext(ctx, `INSERT INTO schema_migrations(version, applied_at) VALUES (?, datetime('now'))`, name); err != nil {
+			_ = tx.Rollback()
+			return fmt.Errorf("record migration %s: %w", name, err)
+		}
+
+		if err := tx.Commit(); err != nil {
+			return fmt.Errorf("commit migration %s: %w", name, err)
+		}
+	}
+
+	return nil
+}
+
+func migrationApplied(ctx context.Context, db *sql.DB, version string) (bool, error) {
+	var count int
+	if err := db.QueryRowContext(ctx, `SELECT COUNT(1) FROM schema_migrations WHERE version = ?`, version).Scan(&count); err != nil {
+		return false, fmt.Errorf("lookup migration %s: %w", version, err)
+	}
+	return count > 0, nil
+}
+
+func splitStatements(body string) []string {
+	raw := strings.Split(body, ";")
+	statements := make([]string, 0, len(raw))
+	for _, statement := range raw {
+		statement = strings.TrimSpace(statement)
+		if statement == "" {
+			continue
+		}
+		statements = append(statements, statement)
+	}
+	return statements
+}