CHat server Updated

internal/config/env/pg.go

@@ -0,0 +1,36 @@
+package env
+
+import (
+	"errors"
+	"github.com/AndreiMartynenko/chat-server/internal/config"
+	"os"
+)
+
+var _ config.PGConfig = (*pgConfig)(nil)
+
+const (
+	dsnEnvName = "PG_DSN"
+)
+
+type pgConfig struct {
+	dsn string
+}
+
+//NewPGConfig
+
+func NewPGConfig() (*pgConfig, error) {
+	dsn := os.Getenv(dsnEnvName)
+	if len(dsn) == 0 {
+		return nil, errors.New("pg dsn not found")
+	}
+
+	return &pgConfig{
+		dsn: dsn,
+	}, nil
+}
+
+// DSN
+
+func (cfg *pgConfig) DSN() string {
+	return cfg.dsn
+}