feedizer/cmd/feedizer/internal/database/database.go

package database

import (
	"context"
	"fmt"
	"log"
	"time"

	"github.com/jackc/pgx/v4/pgxpool"
)

var LogName string

// ParseConfig parses the database config string and sets LogName.
func ParseConfig(config string) (*pgxpool.Config, error) {
	dbConfig, err := pgxpool.ParseConfig(config)
	LogName = fmt.Sprintf("%s@%s:%s/%s", dbConfig.ConnConfig.User, dbConfig.ConnConfig.Host, dbConfig.ConnConfig.Port, dbConfig.ConnConfig.Database)
	return dbConfig, err
}

func Open(dbConfig *pgxpool.Config) (*pgxpool.Pool, error) {
	log.Printf("database: connecting...")
	db, err := pgxpool.ConnectConfig(context.Background(), dbConfig)
	if err != nil {
		return nil, err
	}

	err = db.Ping(context.Background())
	for i := 1; err != nil && i < 10; i++ {
		log.Printf("database: connection failed, retrying in %d seconds...", i)
		time.Sleep(time.Duration(i) * time.Second)
		err = db.Ping(context.Background())
	}

	if err == nil {
		log.Println("database: connection successful")
	}

	return db, err
}