SimpleCloudNotifier/scnserver/push/firebase.go
Mike Schwörer e329e13a02
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Auto-delete clients when FB returns UNREGISTERED
2024-09-16 20:11:28 +02:00

173 lines
4.3 KiB
Go

package push
import (
scn "blackforestbytes.com/simplecloudnotifier"
"blackforestbytes.com/simplecloudnotifier/models"
"bytes"
"context"
_ "embed"
"encoding/json"
"errors"
"fmt"
"github.com/gin-gonic/gin"
"github.com/rs/zerolog/log"
"gogs.mikescher.com/BlackForestBytes/goext/langext"
"io"
"net/http"
"strconv"
"strings"
"time"
)
// https://firebase.google.com/docs/cloud-messaging/send-message#rest
// https://firebase.google.com/docs/cloud-messaging/auth-server
type FirebaseConnector struct {
fbProject string
client http.Client
auth *FirebaseOAuth2
}
func NewFirebaseConn(conf scn.Config) (NotificationClient, error) {
pkey := strings.ReplaceAll(conf.FirebasePrivateKey, "\\n", "\n")
fbauth, err := NewAuth(conf.FirebaseTokenURI, conf.FirebaseProjectID, conf.FirebaseClientMail, pkey)
if err != nil {
return nil, err
}
return &FirebaseConnector{
fbProject: conf.FirebaseProjectID,
client: http.Client{Timeout: 5 * time.Second},
auth: fbauth,
}, nil
}
type Notification struct {
Id string
Token string
Platform string
Title string
Body string
Priority int
}
func (fb FirebaseConnector) SendNotification(ctx context.Context, user models.User, client models.Client, channel models.Channel, msg models.Message) (string, string, error) {
uri := "https://fcm.googleapis.com/v1/projects/" + fb.fbProject + "/messages:send"
jsonBody := gin.H{}
if client.Type == models.ClientTypeIOS {
jsonBody = gin.H{
"token": client.FCMToken,
"notification": gin.H{
"title": msg.Title,
"body": msg.ShortContent(),
},
"apns": gin.H{},
}
} else if client.Type == models.ClientTypeAndroid {
jsonBody = gin.H{
"token": client.FCMToken,
"android": gin.H{
"priority": "high",
"fcm_options": gin.H{},
},
"data": gin.H{
"scn_msg_id": msg.MessageID.String(),
"usr_msg_id": langext.Coalesce(msg.UserMessageID, ""),
"client_id": client.ClientID.String(),
"timestamp": strconv.FormatInt(msg.Timestamp().Unix(), 10),
"priority": strconv.Itoa(msg.Priority),
"trimmed": langext.Conditional(msg.NeedsTrim(), "true", "false"),
"title": msg.Title,
"channel": channel.DisplayName,
"channel_id": channel.ChannelID,
"body": langext.Coalesce(msg.TrimmedContent(), ""),
},
}
} else {
jsonBody = gin.H{
"token": client.FCMToken,
"notification": gin.H{
"title": msg.FormatNotificationTitle(user, channel),
"body": msg.ShortContent(),
},
}
}
bytesBody, err := json.Marshal(gin.H{"message": jsonBody})
if err != nil {
return "", "", err
}
request, err := http.NewRequestWithContext(ctx, "POST", uri, bytes.NewBuffer(bytesBody))
if err != nil {
return "", "", err
}
tok, err := fb.auth.Token(ctx)
if err != nil {
log.Err(err).Msg("Refreshing FB token failed")
return "", "", err
}
request.Header.Set("Authorization", "Bearer "+tok)
request.Header.Set("Content-Type", "application/json")
request.Header.Set("Accept", "application/json")
response, err := fb.client.Do(request)
if err != nil {
return "", "", err
}
defer func() { _ = response.Body.Close() }()
if response.StatusCode < 200 || response.StatusCode >= 300 {
if bstr, err := io.ReadAll(response.Body); err == nil {
var errRespBody struct {
Error struct {
Code int `json:"code"`
Message string `json:"message"`
Status string `json:"status"`
Details []struct {
AtType string `json:"@type"`
ECode string `json:"errorCode"`
} `json:"details"`
} `json:"error"`
}
if err := json.Unmarshal(bstr, &errRespBody); err == nil {
for _, v := range errRespBody.Error.Details {
return "", v.ECode, errors.New(fmt.Sprintf("FCM-Request returned %d [UNREGISTERED]: %s", response.StatusCode, string(bstr)))
}
}
return "", "", errors.New(fmt.Sprintf("FCM-Request returned %d: %s", response.StatusCode, string(bstr)))
} else {
return "", "", errors.New(fmt.Sprintf("FCM-Request returned %d", response.StatusCode))
}
}
respBodyBin, err := io.ReadAll(response.Body)
if err != nil {
return "", "", err
}
var respBody struct {
Name string `json:"name"`
}
if err := json.Unmarshal(respBodyBin, &respBody); err != nil {
return "", "", err
}
log.Info().Msg(fmt.Sprintf("Sucessfully pushed notification %s", msg.MessageID))
return respBody.Name, "", nil
}