Push notifications

info

Post request is send only if client does not have established WS connection.

Application sends POST request to user Endpoint, which contains data on request. In order to display the connect push notification on user device connect() function required notificationEndpoint and token.

type Connect = {
  publicKeys: string[],
  sessionId: string,
  notification?: Notification | undefined, // required for notification purposes
  device?: Device | undefined,
  metadata?: string | undefined
}

interface Notification {
  token: string;
  notificationEndpoint: string;
}

interface NotificationPayload {
  token: string
  network: Network
  sessionId: string
  appMetadata: AppMetadata
  device: Device
  request: string // serialized RequestContent
  requestId: string
}

Firebase push notification example:

const firebase = initializeApp(undefined, 'trigger-notification')
export const triggerNotification = onRequest(async (request, response) => {
  try {
    if (request.method !== 'POST') {
      response.status(400).send('Invalid request method')
      return
    }
    const payload = request.body as NotificationPayload
    const messaging = getMessaging(firebase)
    const requestContent = JSON.parse(payload.request) as RequestContent
    await messaging.send({
      token: payload.token,
      android: payload.device === 'Android' ? {} : undefined,
      notification: {
        title: requestContent.type,
        body: 'You have a new request' + payload.appMetadata.name,
        imageUrl: payload.appMetadata.icon
      },
      data: { payload: JSON.stringify(request.body) }
    })
    response.status(200).send('OK')
    return
  } catch (error: any) {
    console.log(error)
    response.status(400).send(error.toString())
    return
  }
})