codeword/internal/adapters/client/mail.go

package client

import (
	"bytes"
	"encoding/base64"
	"fmt"
	"github.com/gofiber/fiber/v2"
	"go.uber.org/zap"
	"mime/multipart"
)

type RecoveryEmailSenderDeps struct {
	SmtpApiUrl  string
	SmtpHost    string
	SmtpPort    string
	SmtpSender  string
	Username    string
	Password    string
	ApiKey      string
	FiberClient *fiber.Client
	Logger      *zap.Logger
}

type RecoveryEmailSender struct {
	deps RecoveryEmailSenderDeps
}

func NewRecoveryEmailSender(deps RecoveryEmailSenderDeps) *RecoveryEmailSender {
	if deps.FiberClient == nil {
		deps.FiberClient = fiber.AcquireClient()
	}
	return &RecoveryEmailSender{
		deps: deps,
	}
}

func (r *RecoveryEmailSender) SendRecoveryEmail(email string, signature []byte) error {
	signatureStr := base64.URLEncoding.EncodeToString(signature)
	url := r.deps.SmtpApiUrl

	fmt.Println(email, signatureStr)

	message := fmt.Sprintf("https://hub.pena.digital/codeword/restore/%s", signatureStr)

	form := new(bytes.Buffer)
	writer := multipart.NewWriter(form)
	defer writer.Close()

	fields := map[string]string{
		"from":    r.deps.SmtpSender,
		"to":      "pashamullin202@gmail.com",
		"subject": "Восстановление доступа",
		"html":    message,
	}

	for key, value := range fields {
		if err := writer.WriteField(key, value); err != nil {
			return err
		}
	}

	if err := writer.Close(); err != nil {
		return err
	}

	req := r.deps.FiberClient.Post(url).Body(form.Bytes()).ContentType(writer.FormDataContentType())
	if r.deps.ApiKey != "" {
		req.Set("Authorization", r.deps.ApiKey)
	}

	statusCode, body, errs := req.Bytes()
	if errs != nil {
		r.deps.Logger.Error("Ошибка при отправке запроса", zap.Error(errs[0]))
		return errs[0]
	}

	if statusCode != fiber.StatusOK {
		err := fmt.Errorf("SMTP сервис вернул ошибку: %s Тело ответа: %s", statusCode, body)
		r.deps.Logger.Error("Ошибка при отправке электронной почты", zap.Error(err))
		return err
	}

	r.deps.Logger.Info("Письмо для восстановления отправлено", zap.String("email", email))
	return nil
}