/*
 * 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.util.view

import android.view.View
import com.android.systemui.util.kotlin.awaitCancellationThenDispose
import kotlinx.coroutines.DisposableHandle
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.collectLatest

/**
 * Use the [bind] method to bind the view every time this flow emits, and suspend to await for more
 * updates. New emissions lead to the previous binding call being cancelled if not completed.
 * Dispose of the [DisposableHandle] returned by [bind] when done.
 */
suspend fun <T : View> Flow<T>.bindLatest(bind: (T) -> DisposableHandle?) {
    this.collectLatest { view ->
        val disposableHandle = bind(view)
        disposableHandle?.awaitCancellationThenDispose()
    }
}
