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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.systemui.controls.controller
import android.os.IBinder
import android.service.controls.Control
import android.service.controls.IControlsSubscriber
import android.service.controls.IControlsSubscription
import android.util.Log
import com.android.systemui.util.concurrency.DelayableExecutor
/**
* A single subscriber, supporting stateful controls for publishers created by
* {@link ControlsProviderService#createPublisherFor}. In general, this subscription will remain
* active until the SysUi chooses to cancel it.
*/
class StatefulControlSubscriber(
private val controller: ControlsController,
private val provider: ControlsProviderLifecycleManager,
private val bgExecutor: DelayableExecutor,
private val requestLimit: Long
) : IControlsSubscriber.Stub() {
private var subscriptionOpen = false
private var subscription: IControlsSubscription? = null
companion object {
private const val TAG = "StatefulControlSubscriber"
}
private fun run(token: IBinder, f: () -> Unit) {
if (provider.token == token) {
bgExecutor.execute { f() }
}
}
override fun onSubscribe(token: IBinder, subs: IControlsSubscription) {
run(token) {
subscriptionOpen = true
subscription = subs
provider.startSubscription(subs, requestLimit)
}
}
override fun onNext(token: IBinder, control: Control) {
run(token) {
if (!subscriptionOpen) {
Log.w(TAG, "Refresh outside of window for token:$token")
} else {
controller.refreshStatus(provider.componentName, control)
}
}
}
override fun onError(token: IBinder, error: String) {
run(token) {
if (subscriptionOpen) {
subscriptionOpen = false
Log.e(TAG, "onError receive from '${provider.componentName}': $error")
}
}
}
override fun onComplete(token: IBinder) {
run(token) {
if (subscriptionOpen) {
subscriptionOpen = false
Log.i(TAG, "onComplete receive from '${provider.componentName}'")
}
}
}
fun cancel() {
if (!subscriptionOpen) return
bgExecutor.execute {
if (subscriptionOpen) {
subscriptionOpen = false
subscription?.let {
provider.cancelSubscription(it)
}
subscription = null
}
}
}
}
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