/*
 * Copyright 2022 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
 *
 *     https://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.google.samples.apps.nowinandroid.core.ui

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter

class TimeZoneBroadcastReceiver(
    val onTimeZoneChanged: () -> Unit
) : BroadcastReceiver() {
    private var registered = false

    override fun onReceive(context: Context, intent: Intent) {
        if (intent.action == Intent.ACTION_TIMEZONE_CHANGED) {
            onTimeZoneChanged()
        }
    }

    fun register(context: Context) {
        if (!registered) {
            val filter = IntentFilter()
            filter.addAction(Intent.ACTION_TIMEZONE_CHANGED)
            context.registerReceiver(this, filter)
            registered = true
        }
    }

    fun unregister(context: Context) {
        if (registered) {
            context.unregisterReceiver(this)
            registered = false
        }
    }
}
