/*
 * Copyright (C) 2023 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.dock

import com.android.systemui.common.coroutine.ConflatedCallbackFlow
import kotlinx.coroutines.channels.awaitClose
import kotlinx.coroutines.flow.Flow

/**
 * Retrieves whether or not the device is docked according to DockManager. Emits a starting value
 *  of isDocked.
 */
fun DockManager.retrieveIsDocked(): Flow<Boolean> =
    ConflatedCallbackFlow.conflatedCallbackFlow {
        val callback = DockManager.DockEventListener { trySend(isDocked) }
        addListener(callback)
        trySend(isDocked)

        awaitClose { removeListener(callback) }
    }