/
fcm_sender.go
68 lines (55 loc) · 1.63 KB
/
fcm_sender.go
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package fcm
import (
"encoding/json"
"time"
log "github.com/Sirupsen/logrus"
"github.com/Bogh/gcm"
"github.com/smancke/guble/protocol"
"github.com/smancke/guble/server/connector"
)
const (
// sendRetries is the number of retries when something fails
sendRetries = 5
// sendTimeout timeout to wait for response from FCM
sendTimeout = time.Second
)
type sender struct {
gcmSender gcm.Sender
}
func NewSender(apiKey string) *sender {
return &sender{
gcmSender: gcm.NewSender(apiKey, sendRetries, sendTimeout),
}
}
func (s *sender) Send(request connector.Request) (interface{}, error) {
deviceToken := request.Subscriber().Route().Get(deviceTokenKey)
fcmMessage := fcmMessage(request.Message())
fcmMessage.To = deviceToken
logger.WithFields(log.Fields{"deviceToken": fcmMessage.To}).Debug("sending message")
return s.gcmSender.Send(fcmMessage)
}
func fcmMessage(message *protocol.Message) *gcm.Message {
m := &gcm.Message{}
err := json.Unmarshal(message.Body, m)
if err != nil {
logger.WithFields(log.Fields{
"error": err.Error(),
"body": string(message.Body),
"messageID": message.ID,
}).Debug("Could not decode gcm.Message from guble message body")
} else if m.Notification != nil && m.Data != nil {
return m
}
err = json.Unmarshal(message.Body, &m.Data)
if err != nil {
m.Data = map[string]interface{}{
"message": message.Body,
}
}
return m
}
// isValidResponseError returns True if the error is accepted as a valid response
// cases are InvalidRegistration and NotRegistered
func isValidResponseError(err error) bool {
return err.Error() == "InvalidRegistration" || err.Error() == "NotRegistered"
}