concord/internal/infra/db/db.go

package db

import (
	"context"
	"fmt"
	"time"

	"github.com/Alexander-D-Karpov/concord/internal/common/config"
	"github.com/jackc/pgx/v5/pgxpool"
)

type DB struct {
	Pool *pgxpool.Pool
}

func New(cfg config.DatabaseConfig) (*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.Database,
	)

	poolConfig, err := pgxpool.ParseConfig(dsn)
	if err != nil {
		return nil, fmt.Errorf("parse pool config: %w", err)
	}

	poolConfig.MaxConns = int32(cfg.MaxConns)
	poolConfig.MinConns = int32(cfg.MinConns)
	poolConfig.MaxConnLifetime = cfg.MaxConnLifetime
	poolConfig.MaxConnIdleTime = cfg.MaxConnIdleTime
	poolConfig.HealthCheckPeriod = 1 * time.Minute

	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()

	pool, err := pgxpool.NewWithConfig(ctx, poolConfig)
	if err != nil {
		return nil, fmt.Errorf("create pool: %w", err)
	}

	if err := pool.Ping(ctx); err != nil {
		pool.Close()
		return nil, fmt.Errorf("ping database: %w", err)
	}

	return &DB{Pool: pool}, nil
}

func (d *DB) Close() {
	if d.Pool != nil {
		d.Pool.Close()
	}
}

func (d *DB) Health(ctx context.Context) error {
	ctx, cancel := context.WithTimeout(ctx, 2*time.Second)
	defer cancel()
	return d.Pool.Ping(ctx)
}