//
//  ViewModel.swift
//  PaiAi
//
//  Created by LISA on 2017/5/31.
//  Copyright © 2017年 yb. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa


protocol ViewModel {
    associatedtype T
    var models: Variable<[T]>   { get set }
    var observer: Observable<[T]> { get }
    subscript(index: Int) -> T { get }
    func removeAll()
    func remove(at: Int)
    func allData() -> [T]
    var count: Int { get }
    var hasMoreData: Bool { get }
    var page: Int { set get }
}



extension ViewModel {
    var count: Int { get{ return models.value.count } }
    
    var hasMoreData: Bool { get{ return count % 20 == 0 } }

    var observer: Observable<[T]> { get{ return models.asObservable() } }
    
    subscript(index: Int)-> T { return models.value[index] }
    
    func removeAll() { models.value.removeAll() }
    
    func remove(at i: Int) { models.value.remove(at: i) }
    
    func allData() -> [T] { return models.value }
    
}