PullToRefreshModel is use to handle pagination

PullToRefreshModel

//
//  PullToRefreshModel.swift
//  BaseProject
//
//  Created by AshvinGudaliya on 22/06/18.
//  Copyright © 2018 Ashvin Gudaliya. All rights reserved.
//

import UIKit

class PullToRefreshModel {
    private var isLastData: Bool = false
    private var isWebDataLoaded: Bool = false
    private var isWebServicesCallRuning: Bool = false
    private var page: Int = 0
    private var isFailedWebApi: Bool = false
    
    init(page: Int) {
        self.page = page
        isLastData = false
        isWebDataLoaded = false
        isWebServicesCallRuning = false
        isFailedWebApi = false
    }
    
    func resetWithPage(page: Int) {
        self.page = page
        isLastData = false
        isWebDataLoaded = false
        isFailedWebApi = false
    }
    
    func getPageIndex() -> String { return page.string }
    
    func isLoadMoreDataWebservices(index: IndexPath, data: [Any], completionsHandler: (() -> Void)) {
        if !isLastData && !isWebServicesCallRuning && data.count != 0 && !isFailedWebApi && index.row != 0{
            if (data.count - 3) <= index.row {
                self.start()
                completionsHandler()
            }
        }
    }
    
    func showSkeltoneView(data: [Any]) -> Bool {
        return data.count == 0 && !self.isWebDataLoaded && !self.isFailedWebApi
    }
    
    func responseData(withNewData data: [Any]) {
        if data.count == 0 {
            isLastData = true
        }
        else{
            isLastData = false
            page += 1
        }
        self.isWebDataLoaded = true
        self.isFailedWebApi = false
    }
    
    func apiFailer() {
        self.stop()
        self.isFailedWebApi = true
    }
    
    func start() {
        self.isWebServicesCallRuning = true
    }
    
    func stop() {
        self.isWebServicesCallRuning = false
    }
}