476 lines
16 KiB
Go
476 lines
16 KiB
Go
package notificationservice
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import (
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"context"
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"encoding/json"
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"errors"
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"log/slog"
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"sync"
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"time"
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"github.com/SamuelTariku/FortuneBet-Backend/internal/config"
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"github.com/SamuelTariku/FortuneBet-Backend/internal/domain"
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"github.com/SamuelTariku/FortuneBet-Backend/internal/pkgs/helpers"
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"github.com/SamuelTariku/FortuneBet-Backend/internal/repository"
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// "github.com/SamuelTariku/FortuneBet-Backend/internal/services/wallet"
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"github.com/SamuelTariku/FortuneBet-Backend/internal/web_server/ws"
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afro "github.com/amanuelabay/afrosms-go"
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"github.com/gorilla/websocket"
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"github.com/redis/go-redis/v9"
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)
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type Service struct {
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repo repository.NotificationRepository
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Hub *ws.NotificationHub
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// notificationStore
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connections sync.Map
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notificationCh chan *domain.Notification
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stopCh chan struct{}
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config *config.Config
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logger *slog.Logger
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redisClient *redis.Client
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}
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func New(repo repository.NotificationRepository, logger *slog.Logger, cfg *config.Config) *Service {
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hub := ws.NewNotificationHub()
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rdb := redis.NewClient(&redis.Options{
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Addr: cfg.RedisAddr, // e.g., "redis:6379"
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})
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svc := &Service{
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repo: repo,
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Hub: hub,
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logger: logger,
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connections: sync.Map{},
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notificationCh: make(chan *domain.Notification, 1000),
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stopCh: make(chan struct{}),
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config: cfg,
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redisClient: rdb,
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}
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go hub.Run()
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go svc.startWorker()
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go svc.startRetryWorker()
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go svc.RunRedisSubscriber(context.Background())
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return svc
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}
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func (s *Service) addConnection(recipientID int64, c *websocket.Conn) {
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if c == nil {
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s.logger.Warn("[NotificationSvc.AddConnection] Attempted to add nil WebSocket connection", "recipientID", recipientID)
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return
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}
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s.connections.Store(recipientID, c)
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s.logger.Info("[NotificationSvc.AddConnection] Added WebSocket connection", "recipientID", recipientID)
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}
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func (s *Service) SendNotification(ctx context.Context, notification *domain.Notification) error {
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notification.ID = helpers.GenerateID()
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notification.Timestamp = time.Now()
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notification.DeliveryStatus = domain.DeliveryStatusPending
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created, err := s.repo.CreateNotification(ctx, notification)
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if err != nil {
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s.logger.Error("[NotificationSvc.SendNotification] Failed to create notification", "id", notification.ID, "error", err)
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return err
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}
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notification = created
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if notification.DeliveryChannel == domain.DeliveryChannelInApp {
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s.Hub.Broadcast <- map[string]interface{}{
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"type": "CREATED_NOTIFICATION",
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"recipient_id": notification.RecipientID,
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"payload": notification,
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}
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}
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select {
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case s.notificationCh <- notification:
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default:
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s.logger.Warn("[NotificationSvc.SendNotification] Notification channel full, dropping notification", "id", notification.ID)
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}
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return nil
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}
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func (s *Service) MarkAsRead(ctx context.Context, notificationIDs []string, recipientID int64) error {
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for _, notificationID := range notificationIDs {
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_, err := s.repo.UpdateNotificationStatus(ctx, notificationID, string(domain.DeliveryStatusSent), true, nil)
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if err != nil {
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s.logger.Error("[NotificationSvc.MarkAsRead] Failed to mark notification as read", "notificationID", notificationID, "recipientID", recipientID, "error", err)
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return err
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}
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// count, err := s.repo.CountUnreadNotifications(ctx, recipientID)
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// if err != nil {
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// s.logger.Error("[NotificationSvc.MarkAsRead] Failed to count unread notifications", "recipientID", recipientID, "error", err)
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// return err
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// }
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// s.Hub.Broadcast <- map[string]interface{}{
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// "type": "COUNT_NOT_OPENED_NOTIFICATION",
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// "recipient_id": recipientID,
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// "payload": map[string]int{
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// "not_opened_notifications_count": int(count),
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// },
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// }
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s.logger.Info("[NotificationSvc.MarkAsRead] Notification marked as read", "notificationID", notificationID, "recipientID", recipientID)
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}
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return nil
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}
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func (s *Service) ListNotifications(ctx context.Context, recipientID int64, limit, offset int) ([]domain.Notification, error) {
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notifications, err := s.repo.ListNotifications(ctx, recipientID, limit, offset)
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if err != nil {
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s.logger.Error("[NotificationSvc.ListNotifications] Failed to list notifications", "recipientID", recipientID, "limit", limit, "offset", offset, "error", err)
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return nil, err
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}
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s.logger.Info("[NotificationSvc.ListNotifications] Successfully listed notifications", "recipientID", recipientID, "count", len(notifications))
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return notifications, nil
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}
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func (s *Service) GetAllNotifications(ctx context.Context, limit, offset int) ([]domain.Notification, error) {
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notifications, err := s.repo.GetAllNotifications(ctx, limit, offset)
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if err != nil {
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s.logger.Error("[NotificationSvc.ListNotifications] Failed to get all notifications")
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return nil, err
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}
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s.logger.Info("[NotificationSvc.ListNotifications] Successfully retrieved all notifications", "count", len(notifications))
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return notifications, nil
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}
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func (s *Service) ConnectWebSocket(ctx context.Context, recipientID int64, c *websocket.Conn) error {
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s.addConnection(recipientID, c)
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s.logger.Info("[NotificationSvc.ConnectWebSocket] WebSocket connection established", "recipientID", recipientID)
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return nil
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}
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func (s *Service) DisconnectWebSocket(recipientID int64) {
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if conn, loaded := s.connections.LoadAndDelete(recipientID); loaded {
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conn.(*websocket.Conn).Close()
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s.logger.Info("[NotificationSvc.DisconnectWebSocket] Disconnected WebSocket", "recipientID", recipientID)
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}
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}
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func (s *Service) SendSMS(ctx context.Context, recipientID int64, message string) error {
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s.logger.Info("[NotificationSvc.SendSMS] SMS notification requested", "recipientID", recipientID, "message", message)
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apiKey := s.config.AFRO_SMS_API_KEY
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senderName := s.config.AFRO_SMS_SENDER_NAME
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receiverPhone := s.config.AFRO_SMS_RECEIVER_PHONE_NUMBER
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hostURL := s.config.ADRO_SMS_HOST_URL
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endpoint := "/api/send"
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request := afro.GetRequest(apiKey, endpoint, hostURL)
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request.Method = "GET"
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request.Sender(senderName)
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request.To(receiverPhone, message)
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response, err := afro.MakeRequestWithContext(ctx, request)
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if err != nil {
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s.logger.Error("[NotificationSvc.SendSMS] Failed to send SMS", "recipientID", recipientID, "error", err)
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return err
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}
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if response["acknowledge"] == "success" {
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s.logger.Info("[NotificationSvc.SendSMS] SMS sent successfully", "recipientID", recipientID)
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} else {
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s.logger.Error("[NotificationSvc.SendSMS] Failed to send SMS", "recipientID", recipientID, "response", response["response"])
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return errors.New("SMS delivery failed: " + response["response"].(string))
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}
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return nil
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}
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func (s *Service) SendEmail(ctx context.Context, recipientID int64, subject, message string) error {
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s.logger.Info("[NotificationSvc.SendEmail] Email notification requested", "recipientID", recipientID, "subject", subject)
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return nil
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}
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func (s *Service) startWorker() {
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for {
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select {
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case notification := <-s.notificationCh:
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s.handleNotification(notification)
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case <-s.stopCh:
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s.logger.Info("[NotificationSvc.StartWorker] Worker stopped")
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return
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}
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}
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}
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func (s *Service) ListRecipientIDs(ctx context.Context, receiver domain.NotificationRecieverSide) ([]int64, error) {
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return s.repo.ListRecipientIDs(ctx, receiver)
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}
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func (s *Service) handleNotification(notification *domain.Notification) {
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ctx := context.Background()
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switch notification.DeliveryChannel {
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case domain.DeliveryChannelSMS:
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err := s.SendSMS(ctx, notification.RecipientID, notification.Payload.Message)
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if err != nil {
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notification.DeliveryStatus = domain.DeliveryStatusFailed
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} else {
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notification.DeliveryStatus = domain.DeliveryStatusSent
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}
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case domain.DeliveryChannelEmail:
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err := s.SendEmail(ctx, notification.RecipientID, notification.Payload.Headline, notification.Payload.Message)
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if err != nil {
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notification.DeliveryStatus = domain.DeliveryStatusFailed
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} else {
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notification.DeliveryStatus = domain.DeliveryStatusSent
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}
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default:
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if notification.DeliveryChannel != domain.DeliveryChannelInApp {
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s.logger.Warn("[NotificationSvc.HandleNotification] Unsupported delivery channel", "channel", notification.DeliveryChannel)
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notification.DeliveryStatus = domain.DeliveryStatusFailed
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}
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}
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if _, err := s.repo.UpdateNotificationStatus(ctx, notification.ID, string(notification.DeliveryStatus), notification.IsRead, notification.Metadata); err != nil {
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s.logger.Error("[NotificationSvc.HandleNotification] Failed to update notification status", "id", notification.ID, "error", err)
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}
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}
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func (s *Service) startRetryWorker() {
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ticker := time.NewTicker(1 * time.Minute)
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defer ticker.Stop()
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for {
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select {
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case <-ticker.C:
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s.retryFailedNotifications()
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case <-s.stopCh:
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s.logger.Info("[NotificationSvc.StartRetryWorker] Retry worker stopped")
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return
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}
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}
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}
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func (s *Service) retryFailedNotifications() {
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ctx := context.Background()
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failedNotifications, err := s.repo.ListFailedNotifications(ctx, 100)
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if err != nil {
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s.logger.Error("[NotificationSvc.RetryFailedNotifications] Failed to list failed notifications", "error", err)
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return
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}
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for _, n := range failedNotifications {
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notification := &n
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go func(notification *domain.Notification) {
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for attempt := 0; attempt < 3; attempt++ {
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time.Sleep(time.Duration(attempt) * time.Second)
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switch notification.DeliveryChannel {
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case domain.DeliveryChannelSMS:
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if err := s.SendSMS(ctx, notification.RecipientID, notification.Payload.Message); err == nil {
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notification.DeliveryStatus = domain.DeliveryStatusSent
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if _, err := s.repo.UpdateNotificationStatus(ctx, notification.ID, string(notification.DeliveryStatus), notification.IsRead, notification.Metadata); err != nil {
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s.logger.Error("[NotificationSvc.RetryFailedNotifications] Failed to update after retry", "id", notification.ID, "error", err)
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}
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s.logger.Info("[NotificationSvc.RetryFailedNotifications] Successfully retried notification", "id", notification.ID)
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return
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}
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case domain.DeliveryChannelEmail:
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if err := s.SendEmail(ctx, notification.RecipientID, notification.Payload.Headline, notification.Payload.Message); err == nil {
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notification.DeliveryStatus = domain.DeliveryStatusSent
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if _, err := s.repo.UpdateNotificationStatus(ctx, notification.ID, string(notification.DeliveryStatus), notification.IsRead, notification.Metadata); err != nil {
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s.logger.Error("[NotificationSvc.RetryFailedNotifications] Failed to update after retry", "id", notification.ID, "error", err)
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}
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s.logger.Info("[NotificationSvc.RetryFailedNotifications] Successfully retried notification", "id", notification.ID)
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return
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}
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}
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}
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s.logger.Error("[NotificationSvc.RetryFailedNotifications] Max retries reached for notification", "id", notification.ID)
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}(notification)
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}
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}
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func (s *Service) CountUnreadNotifications(ctx context.Context, recipient_id int64) (int64, error) {
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return s.repo.CountUnreadNotifications(ctx, recipient_id)
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}
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// func (s *Service) GetNotificationCounts(ctx context.Context, filter domain.ReportFilter) (total, read, unread int64, err error){
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// return s.repo.Get(ctx, filter)
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// }
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func (s *Service) RunRedisSubscriber(ctx context.Context) {
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pubsub := s.redisClient.Subscribe(ctx, "live_metrics")
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defer pubsub.Close()
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ch := pubsub.Channel()
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for msg := range ch {
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var parsed map[string]interface{}
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if err := json.Unmarshal([]byte(msg.Payload), &parsed); err != nil {
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s.logger.Error("invalid Redis message format", "payload", msg.Payload, "error", err)
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continue
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}
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eventType, _ := parsed["type"].(string)
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payload := parsed["payload"]
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recipientID, hasRecipient := parsed["recipient_id"]
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recipientType, _ := parsed["recipient_type"].(string)
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message := map[string]interface{}{
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"type": eventType,
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"payload": payload,
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}
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if hasRecipient {
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message["recipient_id"] = recipientID
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message["recipient_type"] = recipientType
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}
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s.Hub.Broadcast <- message
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}
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}
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func (s *Service) UpdateLiveWalletMetrics(ctx context.Context, companies []domain.GetCompany, branches []domain.BranchWallet) error {
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const key = "live_metrics"
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companyBalances := make([]domain.CompanyWalletBalance, 0, len(companies))
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for _, c := range companies {
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companyBalances = append(companyBalances, domain.CompanyWalletBalance{
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CompanyID: c.ID,
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CompanyName: c.Name,
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Balance: float64(c.WalletBalance.Float32()),
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})
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}
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branchBalances := make([]domain.BranchWalletBalance, 0, len(branches))
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for _, b := range branches {
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branchBalances = append(branchBalances, domain.BranchWalletBalance{
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BranchID: b.ID,
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BranchName: b.Name,
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CompanyID: b.CompanyID,
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Balance: float64(b.Balance.Float32()),
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})
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}
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payload := domain.LiveWalletMetrics{
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Timestamp: time.Now(),
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CompanyBalances: companyBalances,
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BranchBalances: branchBalances,
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}
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updatedData, err := json.Marshal(payload)
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if err != nil {
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return err
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}
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if err := s.redisClient.Set(ctx, key, updatedData, 0).Err(); err != nil {
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return err
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}
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if err := s.redisClient.Publish(ctx, key, updatedData).Err(); err != nil {
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return err
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}
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return nil
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}
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func (s *Service) GetLiveMetrics(ctx context.Context) (domain.LiveMetric, error) {
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const key = "live_metrics"
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var metric domain.LiveMetric
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val, err := s.redisClient.Get(ctx, key).Result()
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if err == redis.Nil {
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// Key does not exist yet, return zero-valued struct
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return domain.LiveMetric{}, nil
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} else if err != nil {
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return domain.LiveMetric{}, err
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}
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if err := json.Unmarshal([]byte(val), &metric); err != nil {
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return domain.LiveMetric{}, err
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}
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return metric, nil
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}
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func (s *Service) UpdateLiveMetricForWallet(ctx context.Context, wallet domain.Wallet) {
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var (
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payload domain.LiveWalletMetrics
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event map[string]interface{}
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key = "live_metrics"
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)
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// Try company first
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company, companyErr := s.GetCompanyByWalletID(ctx, wallet.ID)
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if companyErr == nil {
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payload = domain.LiveWalletMetrics{
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Timestamp: time.Now(),
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CompanyBalances: []domain.CompanyWalletBalance{{
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CompanyID: company.ID,
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CompanyName: company.Name,
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Balance: float64(wallet.Balance),
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}},
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BranchBalances: []domain.BranchWalletBalance{},
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}
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event = map[string]interface{}{
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"type": "LIVE_WALLET_METRICS_UPDATE",
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"recipient_id": company.ID,
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"recipient_type": "company",
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"payload": payload,
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}
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} else {
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// Try branch next
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branch, branchErr := s.GetBranchByWalletID(ctx, wallet.ID)
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if branchErr == nil {
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payload = domain.LiveWalletMetrics{
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Timestamp: time.Now(),
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CompanyBalances: []domain.CompanyWalletBalance{},
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BranchBalances: []domain.BranchWalletBalance{{
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BranchID: branch.ID,
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BranchName: branch.Name,
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CompanyID: branch.CompanyID,
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Balance: float64(wallet.Balance),
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}},
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}
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event = map[string]interface{}{
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"type": "LIVE_WALLET_METRICS_UPDATE",
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"recipient_id": branch.ID,
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"recipient_type": "branch",
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"payload": payload,
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}
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} else {
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// Neither company nor branch matched this wallet
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s.logger.Warn("wallet not linked to any company or branch", "walletID", wallet.ID)
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return
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}
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}
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// Save latest metric to Redis
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if jsonBytes, err := json.Marshal(payload); err == nil {
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s.redisClient.Set(ctx, key, jsonBytes, 0)
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} else {
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s.logger.Error("failed to marshal wallet metrics payload", "walletID", wallet.ID, "err", err)
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}
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// Publish via Redis
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if jsonEvent, err := json.Marshal(event); err == nil {
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s.redisClient.Publish(ctx, key, jsonEvent)
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} else {
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s.logger.Error("failed to marshal event payload", "walletID", wallet.ID, "err", err)
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}
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// Broadcast over WebSocket
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s.Hub.Broadcast <- event
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}
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func (s *Service) GetCompanyByWalletID(ctx context.Context, walletID int64) (domain.Company, error) {
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return s.GetCompanyByWalletID(ctx, walletID)
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}
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func (s *Service) GetBranchByWalletID(ctx context.Context, walletID int64) (domain.Branch, error) {
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return s.GetBranchByWalletID(ctx, walletID)
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}
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