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package services
import (
"context"
"fmt"
"time"
"github.com/palantir/stacktrace"
"github.com/NdoleStudio/httpsms/pkg/cache"
"github.com/NdoleStudio/httpsms/pkg/emails"
"github.com/NdoleStudio/httpsms/pkg/events"
"github.com/NdoleStudio/httpsms/pkg/repositories"
"github.com/NdoleStudio/httpsms/pkg/telemetry"
)
// EmailNotificationService is responsible for handling email notifications about messages
type EmailNotificationService struct {
service
logger telemetry.Logger
tracer telemetry.Tracer
userRepository repositories.UserRepository
factory emails.NotificationEmailFactory
mailer emails.Mailer
cache cache.Cache
}
const (
fifteenMinuteTimeout = 15 * time.Minute
oneHourTimeout = 1 * time.Hour
)
// NewEmailNotificationService creates a new EmailNotificationService
func NewEmailNotificationService(
logger telemetry.Logger,
tracer telemetry.Tracer,
userRepository repositories.UserRepository,
factory emails.NotificationEmailFactory,
mailer emails.Mailer,
cache cache.Cache,
) *EmailNotificationService {
return &EmailNotificationService{
logger: logger.WithService(fmt.Sprintf("%T", &EmailNotificationService{})),
tracer: tracer,
userRepository: userRepository,
factory: factory,
mailer: mailer,
cache: cache,
}
}
// NotifyMessageExpired sends an email to the user about an expired message
func (service *EmailNotificationService) NotifyMessageExpired(ctx context.Context, payload *events.MessageSendExpiredPayload) error {
ctx, span, ctxLogger := service.tracer.StartWithLogger(ctx, service.logger)
defer span.End()
if !payload.IsFinal {
ctxLogger.Info(fmt.Sprintf("[%s] event is not final, send attempt count = [%d]", events.EventTypeMessageSendExpired, payload.SendAttemptCount))
return nil
}
if !service.canSendEmail(ctx, events.EventTypeMessageSendExpired, payload.Owner) {
ctxLogger.Info(fmt.Sprintf("[%s] email already sent to user [%s] with owner [%s]", events.EventTypeMessageSendExpired, payload.UserID, payload.Owner))
return nil
}
user, err := service.userRepository.Load(ctx, payload.UserID)
if err != nil {
msg := fmt.Sprintf("cannot load user with ID [%s] and for expired message with ID [%s]", payload.UserID, payload.MessageID)
return service.tracer.WrapErrorSpan(span, stacktrace.PropagateWithCode(err, stacktrace.GetCode(err), msg))
}
if !user.NotificationMessageStatusEnabled {
ctxLogger.Info(fmt.Sprintf("[%s] email notifications disabled for user [%s] with owner [%s]", events.EventTypeMessageSendExpired, payload.UserID, payload.Owner))
return nil
}
email, err := service.factory.MessageExpired(user, payload)
if err != nil {
msg := fmt.Sprintf("cannot create email for user with ID [%s] and for expired message with ID [%s]", payload.UserID, payload.MessageID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
if err = service.mailer.Send(ctx, email); err != nil {
msg := fmt.Sprintf("cannot send email for user with ID [%s] and for expired message with ID [%s]", payload.UserID, payload.MessageID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
ctxLogger.Info(fmt.Sprintf("[%s] email sent to [%s] for message with ID [%s]", events.EventTypeMessageSendExpired, user.ID, payload.MessageID))
service.addToCache(ctx, oneHourTimeout, events.EventTypeMessageSendExpired, payload.Owner)
return nil
}
// NotifyMessageFailed sends an email to the user about a failed message
func (service *EmailNotificationService) NotifyMessageFailed(ctx context.Context, payload *events.MessageSendFailedPayload) error {
ctx, span, ctxLogger := service.tracer.StartWithLogger(ctx, service.logger)
defer span.End()
if !service.canSendEmail(ctx, events.EventTypeMessageSendFailed, payload.Owner) {
ctxLogger.Info(fmt.Sprintf("[%s] email already sent to user [%s] with owner [%s]", events.EventTypeMessageSendFailed, payload.UserID, payload.Owner))
return nil
}
user, err := service.userRepository.Load(ctx, payload.UserID)
if err != nil {
msg := fmt.Sprintf("cannot load user with ID [%s] for [%s] message with ID [%s]", payload.UserID, payload.ID)
return service.tracer.WrapErrorSpan(span, stacktrace.PropagateWithCode(err, stacktrace.GetCode(err), msg))
}
if !user.NotificationMessageStatusEnabled {
ctxLogger.Info(fmt.Sprintf("[%s] email notifications disabled for user [%s] with owner [%s]", events.EventTypeMessageSendFailed, payload.UserID, payload.Owner))
return nil
}
email, err := service.factory.MessageFailed(user, payload)
if err != nil {
msg := fmt.Sprintf("cannot create email for user with ID [%s] for [%s] message with ID [%s]", payload.UserID, payload.ID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
if err = service.mailer.Send(ctx, email); err != nil {
msg := fmt.Sprintf("cannot send email for user with ID [%s] for [%s] message with ID [%s]", payload.UserID, events.EventTypeMessageSendFailed, payload.ID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
ctxLogger.Info(fmt.Sprintf("[%s] email sent to [%s] for message with ID [%s]", events.EventTypeMessageSendFailed, user.ID, payload.ID))
service.addToCache(ctx, fifteenMinuteTimeout, events.EventTypeMessageSendFailed, payload.Owner)
return nil
}
// NotifyWebhookSendFailed sends an email to the user about a failed webhook
func (service *EmailNotificationService) NotifyWebhookSendFailed(ctx context.Context, payload *events.WebhookSendFailedPayload) error {
ctx, span, ctxLogger := service.tracer.StartWithLogger(ctx, service.logger)
defer span.End()
if !service.canSendEmail(ctx, events.EventTypeWebhookSendFailed, payload.Owner) {
ctxLogger.Info(fmt.Sprintf("[%s] email already sent to user [%s] with owner [%s]", events.EventTypeWebhookSendFailed, payload.UserID, payload.Owner))
return nil
}
user, err := service.userRepository.Load(ctx, payload.UserID)
if err != nil {
msg := fmt.Sprintf("cannot load user with ID [%s] for [%s] event with ID [%s]", payload.UserID, events.EventTypeWebhookSendFailed, payload.EventID)
return service.tracer.WrapErrorSpan(span, stacktrace.PropagateWithCode(err, stacktrace.GetCode(err), msg))
}
if !user.NotificationWebhookEnabled {
ctxLogger.Info(fmt.Sprintf("[%s] email notifications disabled for user [%s] with owner [%s]", events.EventTypeWebhookSendFailed, payload.UserID, payload.Owner))
return nil
}
email, err := service.factory.WebhookSendFailed(user, payload)
if err != nil {
msg := fmt.Sprintf("cannot create [%s] email for user with ID [%s] for [%s] event with ID [%s]", events.EventTypeWebhookSendFailed, payload.UserID, payload.EventType, payload.EventID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
if err = service.mailer.Send(ctx, email); err != nil {
msg := fmt.Sprintf("cannot send [%s] email for user with ID [%s] for [%s] event with ID [%s]", events.EventTypeWebhookSendFailed, payload.UserID, payload.EventType, payload.EventID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
ctxLogger.Info(fmt.Sprintf("[%s] email sent to [%s] for [%s] event with ID [%s]", events.EventTypeWebhookSendFailed, user.ID, payload.EventType, payload.EventID))
service.addToCache(ctx, oneHourTimeout, events.EventTypeWebhookSendFailed, payload.Owner)
return nil
}
// NotifyDiscordSendFailed sends an email to the user about a failed discord webhook event
func (service *EmailNotificationService) NotifyDiscordSendFailed(ctx context.Context, payload *events.DiscordSendFailedPayload) error {
ctx, span, ctxLogger := service.tracer.StartWithLogger(ctx, service.logger)
defer span.End()
if !service.canSendEmail(ctx, events.EventTypeDiscordSendFailed, payload.Owner) {
ctxLogger.Info(fmt.Sprintf("[%s] email already sent to user [%s] with owner [%s]", events.EventTypeWebhookSendFailed, payload.UserID, payload.Owner))
return nil
}
user, err := service.userRepository.Load(ctx, payload.UserID)
if err != nil {
msg := fmt.Sprintf("cannot load user with ID [%s] for [%s] event for message with ID [%s]", payload.UserID, payload.EventType, payload.MessageID)
return service.tracer.WrapErrorSpan(span, stacktrace.PropagateWithCode(err, stacktrace.GetCode(err), msg))
}
if !user.NotificationWebhookEnabled {
ctxLogger.Info(fmt.Sprintf("[%s] email notifications disabled for user [%s] with owner [%s]", events.EventTypeDiscordSendFailed, payload.UserID, payload.Owner))
return nil
}
email, err := service.factory.DiscordSendFailed(user, payload)
if err != nil {
msg := fmt.Sprintf("cannot create email for user with ID [%s] for [%s] event and message with ID [%s]", payload.UserID, payload.EventType, payload.MessageID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
if err = service.mailer.Send(ctx, email); err != nil {
msg := fmt.Sprintf("cannot send email for user with ID [%s] for [%s] message with ID [%s]", payload.UserID, events.EventTypeMessageSendFailed, payload.MessageID)
return service.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg))
}
ctxLogger.Info(fmt.Sprintf("[%s] email sent to [%s] for [%s] event with ID [%s]", payload.EventType, user.ID, payload.EventType, payload.MessageID))
service.addToCache(ctx, oneHourTimeout, events.EventTypeDiscordSendFailed, payload.Owner)
return nil
}
func (service *EmailNotificationService) getCacheKey(event string, owner string) string {
return fmt.Sprintf("email.%s.%s", event, owner)
}
func (service *EmailNotificationService) canSendEmail(ctx context.Context, event string, owner string) bool {
_, err := service.cache.Get(ctx, service.getCacheKey(event, owner))
return err != nil
}
func (service *EmailNotificationService) addToCache(ctx context.Context, timeout time.Duration, event string, owner string) {
ctx, span, ctxLogger := service.tracer.StartWithLogger(ctx, service.logger)
defer span.End()
cacheKey := service.getCacheKey(event, owner)
if err := service.cache.Set(ctx, cacheKey, "", timeout); err != nil {
ctxLogger.Error(stacktrace.Propagate(err, fmt.Sprintf("cannot set item in redis with key [%s] for owner [%s]", cacheKey, owner)))
}
}