Initial commit

internal/database/postgres.go

@@ -0,0 +1,41 @@
+package database
+
+import (
+	"database/sql"
+	"fmt"
+	"time"
+
+	_ "github.com/lib/pq"
+)
+
+type Config struct {
+	Host     string
+	Port     int
+	User     string
+	Password string
+	DBName   string
+}
+
+func NewConnection(cfg Config) (*sql.DB, error) {
+	dsn := fmt.Sprintf(
+		"host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
+		cfg.Host, cfg.Port, cfg.User, cfg.Password, cfg.DBName,
+	)
+
+	db, err := sql.Open("postgres", dsn)
+	if err != nil {
+		return nil, err
+	}
+
+	// Connection pooling
+	db.SetMaxOpenConns(25)
+	db.SetMaxOpenConns(5)
+	db.SetConnMaxLifetime(5 * time.Minute)
+	db.SetConnMaxIdleTime(10 * time.Minute)
+
+	if err := db.Ping(); err != nil {
+		return nil, err
+	}
+
+	return db, nil
+}