primeira versão do e-li-nps construido com IA

internal/db/pool.go

@@ -0,0 +1,35 @@
+package db
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+func NewPool(ctx context.Context, databaseURL string) (*pgxpool.Pool, error) {
+	cfg, err := pgxpool.ParseConfig(databaseURL)
+	if err != nil {
+		return nil, fmt.Errorf("parse DATABASE_URL: %w", err)
+	}
+
+	// Reasonable defaults
+	cfg.MaxConns = 10
+	cfg.MinConns = 0
+	cfg.MaxConnLifetime = 60 * time.Minute
+	cfg.MaxConnIdleTime = 10 * time.Minute
+
+	pool, err := pgxpool.NewWithConfig(ctx, cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	ctxPing, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+	if err := pool.Ping(ctxPing); err != nil {
+		pool.Close()
+		return nil, err
+	}
+	return pool, nil
+}