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FCM APIを使用してブラウザからプッシュ通知を受信しています。 firebase-messaging-sw.js
は正常に動作し、Webアプリケーションがバックグラウンドの場合にはmessaging.setBackgroundMessageHandler
が1回だけ発生します。しかし、アプリケーションがフォアグラウンドになっているときは、ブラウザタブごとに1つの通知が届いています(3つのタブでアプリが開かれている場合、3つの通知を受け取ります)。私はこの問題への言及を見つけることができないので、私はこれをどのように処理すべきかと思います。これは、フォアグラウンドのFCMメッセージのコードです。FCMのブラウザでフォアグラウンドの各タブごとに1つの通知を受信
import NotificationActionCreators from '../actions/NotificationActionCreators';
import NotificationService from './NotificationService';
import LocalStorageService from './LocalStorageService';
import { FIREBASE_SCRIPT, FCM_URL, FCM_API_KEY, FCM_AUTH_DOMAIN, FCM_PROJECT_ID, FCM_SENDER_ID, PUSH_PUBLIC_KEY } from '../constants/Constants';
class ServiceWorkerService {
constructor() {
this._messaging = null;
this._subscriptionData = null;
}
// This function is called once
init() {
this.loadScript(FIREBASE_SCRIPT,() => this.onFirebaseLoaded());
}
onFirebaseLoaded() {
// Initialize Firebase
let config = {
apiKey: FCM_API_KEY,
authDomain: FCM_AUTH_DOMAIN,
projectId: FCM_PROJECT_ID,
messagingSenderId: FCM_SENDER_ID
};
firebase.initializeApp(config);
this._messaging = firebase.messaging();
this.requestPermission();
// Callback fired if Instance ID token is updated.
this._messaging.onTokenRefresh(() => {
this._messaging.getToken()
.then((refreshedToken) => {
console.log('Token refreshed.');
NotificationActionCreators.unSubscribe(this._subscriptionData).then(() => {
// Indicate that the new Instance ID token has not yet been sent to the
// app server.
this.setTokenSentToServer(false);
// Send Instance ID token to app server.
this.sendTokenToServer(refreshedToken);
},() => console.log('Error unsubscribing user'));
})
.catch(function(err) {
console.log('Unable to retrieve refreshed token ', err);
});
});
// Handle incoming messages.
// *** THIS IS FIRED ONCE PER TAB ***
this._messaging.onMessage(function(payload) {
console.log("Message received. ", payload);
const data = payload.data;
NotificationActionCreators.notify(data);
});
}
requestPermission() {
console.log('Requesting permission...');
return this._messaging.requestPermission()
.then(() => {
console.log('Notification permission granted.');
this.getToken();
})
.catch(function(err) {
console.log('Unable to get permission to notify.', err);
});
}
getToken() {
// Get Instance ID token. Initially this makes a network call, once retrieved
// subsequent calls to getToken will return from cache.
return this._messaging.getToken()
.then((currentToken) => {
if (currentToken) {
this.sendTokenToServer(currentToken);
} else {
// Show permission request.
console.log('No Instance ID token available. Request permission to generate one.');
this.setTokenSentToServer(false);
}
})
.catch(function(err) {
console.log('An error occurred while retrieving token. ', err);
this.setTokenSentToServer(false);
});
}
sendTokenToServer(currentToken) {
const subscriptionData = {
endpoint: FCM_URL + currentToken,
platform: 'Web'
};
if (!this.isTokenSentToServer()) {
console.log('Sending token to server...');
this.updateSubscriptionOnServer(subscriptionData);
} else {
console.log('Token already sent to server so won\'t send it again ' +
'unless it changes');
}
this._subscriptionData = subscriptionData;
}
isTokenSentToServer() {
return LocalStorageService.get('sentToServer') == 1;
}
setTokenSentToServer(sent) {
LocalStorageService.set('sentToServer', sent ? 1 : 0);
}
updateSubscriptionOnServer(subscriptionData) {
if (subscriptionData) {
NotificationActionCreators.subscribe(subscriptionData);
this.setTokenSentToServer(true);
this._subscriptionData = subscriptionData;
} else {
console.log('Not subscribed');
}
}
unSubscribe() {
this.removeSetTokenSentToServer();
return this._messaging.getToken()
.then((currentToken) => {
return this._messaging.deleteToken(currentToken)
.then(() => {
console.log('Token deleted.');
return NotificationActionCreators.unSubscribe(this._subscriptionData);
})
.catch(function(err) {
console.log('Unable to delete token. ', err);
return new Promise(function(resolve, reject) {
reject(error)
});
});
})
.catch(function(err) {
console.log('Error retrieving Instance ID token. ', err);
return new Promise(function(resolve, reject) {
reject(error)
});
});
}
}
removeSetTokenSentToServer() {
LocalStorageService.remove('sentToServer');
}
loadScript = function (url, callback) {
let head = document.getElementsByTagName('head')[0];
let script = document.createElement('script');
script.type = 'text/javascript';
script.src = url;
script.onload = callback;
// Fire the loading
head.appendChild(script);
}
}
最初に見つかったタブだけで通知を表示する方法はありますか。