/*
 * Copyright 2024 LiveKit, Inc.
 *
 * 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 io.livekit.android.util

fun <K, V> diffMapChange(newMap: Map<K, V>, oldMap: Map<K, V>, defaultValue: V): MutableMap<K, V> {
    val allKeys = newMap.keys + oldMap.keys
    val diff = mutableMapOf<K, V>()

    for (key in allKeys) {
        if (newMap[key] != oldMap[key]) {
            diff[key] = newMap[key] ?: defaultValue
        }
    }

    return diff
}