Additional improvements in headless mode

Hello, I would like to create PR with additional improvements related to headless mode. Before I create PR please let me know if it’s needed. My previous PR (#221 ) was left without any response so I’m trying to implement needed features on my fork and I can share them with community.

But let’s go back to new improvements: I took code from @manuquentin (#223) and added a few changes:

• I left old functionality of backToForeground, just added improvement for silent fail in the headless mode
• I introduced a new method openAppFromHeadlessMode which can take callUUID and saves it
• Whenever we want (especially after a cold boot) we can use another method getExtrasFromHeadlessMode and redirect to user’s call UI

With this PR we would be able to drop additional dependency like react-native-invoke-app.

Demo:

messaging().setBackgroundMessageHandler(async notificaiton => {
    return startCallFromBackgroundAndroid(notificaiton.data, headlessMode)
})

const startCallFromBackgroundAndroid = (payload, isHeadless) => {
    // setup RNCallKeep
   // set available

   RNCallKeep.addEventListener('answerCall', ({ callUUID }) => {
      RNCallKeep.openAppFromHeadlessMode(callUUID)
  })
}

// Later eg. after navigation did mount:

useAsyncEffect(async () => {
  const extras = await RNCallKeep.getExtrasFromHeadlessMode()

  if (extras) {
     navigation.navigate(ScreenNames.CallScreen, {
         roomUUID: extras.callUUID
     })
  }

}, [])

[jpudysz]

Hello everyone, I’m super busy and I can’t contribute here, what’s more, we are far behind each other. You can check my repo with a few additional improvements for Android (https://github.com/jpudysz/react-native-callkeep) - tested on production as I’m developing for my client’s VoIP app.

I tried to create PR here, but I changed backToForeground logic and it differs from original repo. New functionality such as headless mode, locked screen are strictly connected with this function and I can’t merge it. Ideally, we can take my ideas and merge it with the master (I don’t mind and you can copy-paste my code under your PR). Ping me if I needed.

PS. I added changelog inside my repo, so you can check new functionalities. @manuquentin if you want to discuss how to merge it or you need some explanation ping/PM me.

[jpudysz]

I’m happy that I was able to help someone. Cheers from Poland!