Core-Telecom

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dependencies {
    implementation ("androidx.core:core-telecom:1.0.0")
}

<uses-permission android:name="android.permission.MANAGE_OWN_CALLS" />

val callsManager = CallsManager(context)

val capabilities: @CallsManager.Companion.Capability Int =
    (CallsManager.CAPABILITY_BASELINE or
          CallsManager.CAPABILITY_SUPPORTS_VIDEO_CALLING)

callsManager.registerAppWithTelecom(capabilities)

fun createIncomingCallAttributes(
    callerName: String,
    callerNumber: String,
    isVideoCall: Boolean): CallAttributesCompat {
    val addressUri = Uri.parse("YourAppScheme:$callerNumber")

    // Define capabilities supported by your call.
    val callCapabilities = CallAttributesCompat.CallCapability(
        supportsSetInactive = CallAttributesCompat.SUPPORTS_SET_INACTIVE // Call can be made inactive (implies hold)
    )

    return CallAttributesCompat(
        displayName = callerName,
        address = addressUri,
        direction = CallAttributesCompat.DIRECTION_INCOMING,
        callType = if (isVideoCall) CallAttributesCompat.CALL_TYPE_VIDEO_CALL else CallAttributesCompat.CALL_TYPE_AUDIO_CALL,
        callCapabilitiesCompat = callCapabilities
    )
}

try {
    callsManager.addCall(
        INCOMING_CALL_ATTRIBUTES,
        onAnswerCall, // Watch needs to know if it can answer the call.
        onSetCallDisconnected,
        onSetCallActive,
        onSetCallInactive
    ) {
        // The call was successfully added once this scope runs.
        callControlScope = this
    }
}
catch(addCallException: Exception){
   // Handle the addCall failure.
}

when (val result = answer(CallAttributesCompat.CALL_TYPE_AUDIO_CALL)) {
    is CallControlResult.Success -> { /* Call answered */ }
    is CallControlResult.Error -> { /* Handle error */ }
}

disconnect(DisconnectCause(DisconnectCause.REJECTED))

when (val result = setActive()) {
    is CallControlResult.Success -> { /* Call active */ }
    is CallControlResult.Error -> { /* Handle error */ }
}

when (val result = setInactive()) {
    is CallControlResult.Success -> { /* Call on hold */ }
    is CallControlResult.Error -> { /* Handle error */ }
}

disconnect(DisconnectCause(DisconnectCause.LOCAL))

fun observeAudioStateChanges(callControlScope: CallControlScope) {
    with(callControlScope) {
        launch { currentCallEndpoint.collect { /* Update UI */ } }
        launch { availableEndpoints.collect { /* Update UI */ } }
        launch { isMuted.collect { /* Handle mute state */ } }
    }
}

coroutineScope.launch {
     callControlScope.requestEndpointChange(callEndpoint)
}

scope.launch {
    mCallsManager.addCallWithExtensions(
        attributes,
        onAnswer,
        onDisconnect,
        onSetActive,
        onSetInactive
    ) {
        // Initialize extension-specific code...

        // After the call has been initialized, perform in-call actions
        onCall {
            // Example: process call state updates
            callStateFlow.onEach { newState ->
                // handle call state updates and notify telecom
            }.launchIn(this)

            // Use initialized extensions...
        }
    }
}

mCallsManager.addCallWithExtensions(...) {
        // Initialize extensions...

        // Notifies Jetpack that this app supports the participant
        // extension and provides the initial participants state in the call.
        val participantExtension = addParticipantExtension(
            initialParticipants,
            initialActiveParticipant
        )

        // After the call has been initialized, perform in-call control actions
        onCall {
            // other in-call control and extension actions...

            // Example: update remote surfaces when the call participants change
            participantsFlow.onEach { newParticipants ->
                participantExtension.updateParticipants(newParticipants)
            }.launchIn(this)
        }
    }

mCallsManager.addCallWithExtensions(...) {
        // Initialize extensions...

        // Notifies Jetpack that this app supports the participant
        // extension and provides the initial list of participants in the call.
        val participantExtension = addParticipantExtension(initialParticipants)
        // Notifies Jetpack that this app supports the notion of participants
        // being able to raise and lower their hands.
        val raiseHandState = participantExtension.addRaiseHandSupport(
                initialRaisedHands
            ) { onHandRaisedStateChanged ->
                // handle this user's raised hand state changed updates from
                // remote surfaces.
            }

        // After the call has been initialized, perform in-call control actions
        onCall {
            // other in-call control and extension actions...

            // Example: update remote surfaces when the call participants change
            participantsFlow.onEach { newParticipants ->
                participantExtension.updateParticipants(newParticipants)
            }.launchIn(this)
            // notify remote surfaces of which of the participants have their
            // hands raised
            raisedHandsFlow.onEach { newRaisedHands ->
                raiseHandState.updateRaisedHands(newRaisedHands)
            }.launchIn(this)
        }
    }

mCallsManager.addCallWithExtensions(...) {
        // Initialize extensions...

        // Add support for locally silencing the call's outgoing audio and
        // register a handler for when the user changes the call silence state
        // from a remote surface.
        val callSilenceExtension = addLocalCallSilenceExtension(
            initialCallSilenceState = false
        ) { newCallSilenceStateRequest ->
            // handle the user's request to enable/disable call silence from
            // a remote surface
        }

        // After the call has been initialized, perform in-call control actions
        onCall {
            // other in-call control and extension actions...

            // When the call's call silence state changes, update remote
            // surfaces of the new state.
            callSilenceState.onEach { isSilenced ->
                callSilenceExtension.updateIsLocallySilenced(isSilenced)
            }.launchIn(this)
        }
    }

mCallsManager.addCallWithExtensions(...) {
        // Initialize extensions...

        // Add support for a custom call icon to be displayed during the
        // lifetime of the call.
        val callIconExtension = addCallIconExtension(
            initialCallIconUri = initialUri
        )

        // After the call has been initialized, perform in-call control actions
        onCall {
            // other in-call control and extension actions...

            // When the call's icon changes, update remote surfaces by providing
            // the new URI.
            callIconUri.onEach { newIconUri ->
                callIconExtension.updateCallIconUri(newIconUri)
            }.launchIn(this)
        }
    }