So there is a problem I am having currently and I can't figure it out.
I have implemented fcm in a wordpress application, and the notifications are sent as expected under all circumstances except one.
The app is able to send notifications out to subscribers if you choose to, and it's working. However, if I schedule a post it's only sending notifications if a tab of the website is open. If the tab of the website is closed and the scheduled time is past, and I open the website the notification comes through, but it's recieved by the onBackgroundMessage() in the service worker.
If I make a post without scheduling and all tabs are closed I get the notification regardless and its working as wanted, same goes for via postman.
This is the serviceworker currently as is, I initialize the app above this snippet. In the index.js I am using the SDK with webpack. I don't know how relevant that is though.
This is a picture of the plugin I am using to send notifications with
Any idea of what causes this?
Thanks in advance for any pointers.
Related
I have a working PWA application and i have tried integrating push notifications to it which worked. But those notifications happened totally in the front end, a user has to click a button and a push notifications would show up.
In my application i have a cronjob that runs every night to check if certain things are updated. If so i want to send a push notification to a user to notify them.
But i cannot find any information regarding this subject so I'm thinking it's not possible since the nodejs server doesn't have a connection to the PWA. Is there something I'm overlooking on my approach or is it simply not possible?
I'm using the following plugin for implementing and handling FCM push notifications in my xamarin application and there's one little unaddressed problem I'm facing.
I was hoping someone else has already figured it out and could help me.
THE PROBLEM:
It seems to be duplicating my MainActivity although I have the LaunchMode set to SingleTop.
There's an event called OnNotificationReceived that's provided by the library.
This event fires as expected, only once, when the application is in the foreground.
When I minimize the application (let it run in the background), send a notification to the device and tap on the notification, it opens the application, as expected, but if I send another notification after that, while the application is in the foreground, The OnNotificationReceived Event is fired twice.
I've tried changing the NotificationActivityFlags property to SingleTop.
I've tried changing my MainActivity's Launch Mode to SingleTop
I tried running the sample application they've provided to check if its something that I'm doing wrong, and still the same thing happens.
Logging the issue in their Github repository
None of the above have worked.
The issue can be reproduced by:
downloading the sample from the repository, link provided above
replacing their google-services.json file with your own from the Firebase
console.
change the package name of the sample of the application to the one you
have registered on Firebase
following the steps above that I've mentioned
ADDITIONAL INFO
Version Number of Plugin: 1.3.0
Device Tested On: Huawei P8 Lite Android Version 6.0
Version of VS: Visual Studio 2019
Version of Xamarin: 3.4.0.1009999
Update:
Unfortunately, the method below has not proven successful after attempting to implement it, I should have thought of the fact that I'm still going to need the notification object for iOS, earlier.
Myself and the team are going to implement a way to keep track of the users platform on the server and send them a notification either with or without the notification based on their platform, since iOS handles FCM notifications differently from Android. For now we're going to use Google's Instance ID service to determine what platform existing users are on.
Workaround:
I hope this helps someone in the future, if not I hope someone can provide me with a better solution.
In order to have my cake and eat it, basically be able to keep the notification object in the payload instead of removing it and having to further customise the payload to display notifications just for iOS, I changed the MainActivity's (the activity thats launched when a user taps on the notification) Launch mode to SingleInstance. That way I can keep my notification object in the payload and not have to worry about the OnNotificationReceived event being triggered twice.
I am looking for a solution to fetch geolocation periodically (every 1 minute) on mobile browser. I did some research and came to know that fetching geolocation in background (when phone is locked or webapp not active) is impossible. In foreground it works ok.
I am making a web app where I fetch user location and send it to my server. All works ok, until the point where user locks his/her phone. I tried many things for workarounds:
setInterval to get geolocation, works fine in foreground but fails in background
converted my web app into Android using cordova, but same problem existed
used https://github.com/mauron85/cordova-plugin-background-geolocation this plugin for android
works good in both foreground and background
but the same plugin does not work in iPhone (I did not tested it, I searched in Google before moving ahead)
Its not good to release my app with just one platform (android) support, thus this workaround also failed for me.
I also considered using serviceworkers for my web app but it seems issue persist for background
https://github.com/w3c/ServiceWorker/issues/745
I have another solution in mind, but before investing time in it, I wish to know if someone has tried it already.
I learnt about Push notifications:
Web app client registers to Push notification
It sends
subscriber object to my server
My server using this object sends
message to Push notification server
Push notification server
sends messages to my web app client
My web app client wakes up my
service worker for a brief period to show the notification message
As per google documentation:
Note: In the current implementation
of Chrome, whenever we receive a push message and we don't have our
site visible in the browser we must display a notification. That is,
we can't do it silently without the user knowing. If we don't
display a notification the browser automatically creates one to let
the user know that the app is doing work in the background.
I won't mind showing a permanent notification to users until my app is running. I am ready for this trade-off.
Now, my question is, at step 5, when I wake up the service worker **is there a chance I call my main.js (main web app) which might be running in background **, will fetch the geolocation and update it to my server?
Has someone tried this solution already with success or failure, please inform.
Can you try Page visibility Api, which listens for visibilitychange of a browser tab is hidden or switched to other tab (in case of browser). For mobiles, it's just a try.
src : https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API
or You can look into this answer too..
Detecting when screen is locked
I am building my app using Ionic3 and Firebase. Here users can send eatch other messages. I want when a use sends a message to another ures he/she should get a notification in the phone even when the app is closed. I have no idea how to achieve this with Ionic3.
Any suggesions please.
I can see there are mainly 2 plugins for push notifications. cordova-plugin-firebase and cordova-plugin-fcm
At least I can fine some tutorial for cordova-plugin-fcm in the internet. There is no clear example of any wayout given for cordova-plugin-firebase.
You have to use the cordova-plugin-firebase and each time a user logs in using a device, a unique device ID will be registered with respect to that device. This device ID is used to send notifications. Make sure to handle this (device ID), every time a user logs in & logs out. If you do not remove the device_id from the database when a user logs out, he will continue to receive notifications.
You have to use a cordova-plugin for sending push notifications. One of the many available plugins is: cordova-plugin-firebase. This one is a good fit for Ionic 3 because there is an ionic-native wrapper available.
For sending the push notification you can use a third party service (there is also one offered by ionic) or you can send them yourself from your backend.
I am in the beginning stages of developing a react native mobile application. I wanted to get insights on the following on a conceptual level relating to the below.
Say the application goes into the suspended state (as mentioned here) at which point there is no application code being executed. Subsequently, the server sends a push notification based on some changes to the data. It seems that (at least on IOS) there is a way to use push notifications to initiate a download in the background. My questions are:
Is there a way to initiate this download in react native post a push notification when application is suspended?
Is there a way to synchronize the Firebase data with the application post such a push notification while the application is running in background if (1) above is possible?
Any hints on these will be of great help. Thank you.