appcore/email/transport_dump.go

package email

import (
	"fmt"
	"os"
	"path/filepath"

	"code.patial.tech/go/appcore/open"
	"github.com/google/uuid"
)

// DumpToTemp transport is for development environment to ensure emails are renderd as HTML ok
// once dump operation is done it will try to open the html with default app for html
type DumpToTemp struct{}

func (DumpToTemp) Send(msg *Message) error {
	// validate msg first
	if err := msg.Validate(); err != nil {
		return err
	}

	dir := os.TempDir()
	id, err := uuid.NewV7()
	if err != nil {
		return fmt.Errorf("email: failed to generate UUID: %w", err)
	}
	file := filepath.Join(dir, id.String()+".html")

	if err := os.WriteFile(file, []byte(msg.HtmlBody), 0440); err != nil {
		return err
	}

	return open.WithDefaultApp(file)
}