new file structure & koneksi ke DB

internal/database/database.go

@@ -0,0 +1,43 @@
+package database
+
+import (
+	"fmt"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+	"github.com/jmoiron/sqlx"
+)
+
+// DB is the database instance
+var DB *sqlx.DB
+
+// Initialize creates and configures the database connection
+func Initialize(dsn string, maxOpenConns, maxIdleConns int, connMaxLifetime time.Duration) error {
+	var err error
+
+	// Connect to the database
+	DB, err = sqlx.Connect("mysql", dsn)
+	if err != nil {
+		return fmt.Errorf("failed to connect to database: %w", err)
+	}
+
+	// Configure connection pool
+	DB.SetMaxOpenConns(maxOpenConns)
+	DB.SetMaxIdleConns(maxIdleConns)
+	DB.SetConnMaxLifetime(connMaxLifetime)
+
+	// Check connection
+	if err := DB.Ping(); err != nil {
+		return fmt.Errorf("failed to ping database: %w", err)
+	}
+
+	return nil
+}
+
+// Close closes the database connection
+func Close() error {
+	if DB != nil {
+		return DB.Close()
+	}
+	return nil
+}