/*
* Copyright (c) 2010-2020 Belledonne Communications SARL.
*
* This file is part of linhome
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/


import Foundation


class MediatorLiveData<T> : MutableLiveData<T> {
   
	private var sources : [MutableLiveData<T>?] = []
	
	override init(_ initial:T) {
		super.init(initial)
	}
	
	override init () {
		super.init()
	}
	
	func addSource(_ source: MutableLiveData<T>, _ onSourceChange:@escaping ()->Void) {
		sources.append(source)
		source.observe(onChange: { _ in
			onSourceChange()
		})
	}
	
	func destroy() {
		sources.forEach { $0?.clearObservers() }
		clearObservers()
	}
	
}