djid_sirani_ios/Sirani/View/News/Detail/NewsDetailVC.swift

//
//  NewsDetailVC.swift
//  Sirani
//
//  Created by Anhar Solehudin on 06/04/19.
//  Copyright © 2019 Anhar Solehudin. All rights reserved.
//

import UIKit
import WebKit

class NewsDetailVC: UIViewController {
    
    // Outlets
    @IBOutlet weak var NewsText: UITextView!
    @IBOutlet weak var progressLoading: UIView!
    @IBOutlet weak var tanggalLabel: UILabel!
    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var thumbImageView: UIImageView!
    
    // Initialize
    private var presenter: NewsDetailPresenter!
    
    // Segue Id
    private let unwindToHomeSegueId = "unwindNewsDetailToHomeSegueId"
    private let unwindToNewsListSegueId = "unwindNewsDetailToNewsListSegueId"
    let SEGUE_HOME_ID = 21
    let SEGUE_NEWS_LIST_ID = 22
    
    // Constant
    private let alertNoConnectionTitle = "Informasi"
    private let alertNoConnectionMsg = "Sepertinya Anda sedang tidak tersambung pada koneksi internet"
    private let alertNoConnectionActionYes = "OK"
    
    // Public Variable, Use by Segue
    var newsId: Int = 0
    var date: String?
    var judul: String?
    var urlThumb: String?
    var segueId: Int = 0
    
    // Variables
    private var loading = false
    
    // View Lifecycles
    override var preferredStatusBarStyle: UIStatusBarStyle {
        return .lightContent
    }
    
    override func viewWillAppear(_ animated: Bool) {
        presenter.attachView(view: self)
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        
        presenter = NewsDetailPresenter(siraniApiServices: SiraniApiServices())
        
        tanggalLabel.text = self.date
        titleLabel.text = self.judul
        thumbImageView.loadFrom(URLAddress: self.urlThumb ?? "")
        
    }
    
    override func viewDidAppear(_ animated: Bool) {
        loadData()
    }
    
    override func viewDidDisappear(_ animated: Bool) {
        presenter.detachView()
    }
    
    // private functions
    private func loadData() {
        if !loading {
            if ConnectionHelper.isConnectedToNetwork() {
                print("Load data \(newsId)")
                self.presenter.loadData(newsId: self.newsId)
            } else {
                showNoConnection()
            }
        }
    }
    
    // Actions
    @IBAction func onBtnBackTap(_ sender: Any) {
        if segueId == SEGUE_HOME_ID {
            performSegue(withIdentifier: unwindToHomeSegueId, sender: self)
        } else if segueId == SEGUE_NEWS_LIST_ID {
            performSegue(withIdentifier: unwindToNewsListSegueId, sender: self)
        }
        
    }
    
}

// NewsDetailViewDelegate
extension NewsDetailVC: NewsDetailViewDelegate {
    func showNoConnection() {
        let alertNoConnection = UIAlertController(
            title: alertNoConnectionTitle,
            message: alertNoConnectionMsg,
            preferredStyle: .alert
        )
        alertNoConnection.addAction(
            UIAlertAction(title: alertNoConnectionActionYes, style: .default, handler: nil)
        )
        self.present(alertNoConnection, animated: true, completion: nil)
    }
    
    func showLoading() {
        loading = true
        progressLoading.show()
    }
    
    func hideLoading() {
        loading = false
        progressLoading.hide()
    }
    
    func setNewsDetail(newsDetail: NewsDetail) {
        var news = newsDetail.news
        news = news.replacingOccurrences(of: "&lt;", with: "<")
        news = news.replacingOccurrences(of: "&quot;", with: "\"")
        news = news.replacingOccurrences(of: "&amp;", with: "&")
        news = news.replacingOccurrences(of: "&apos;", with: "'")
        news = news.replacingOccurrences(of: "&gt;", with: ">")
        
        DispatchQueue.main.async {
            self.NewsText.setHTMLFromString(news)
            self.NewsText.isEditable = false
        }
    }
    
    
}

extension UITextView {
    func setHTMLFromString(_ htmlText: String) {
        let modifiedFont = String(format:"<span style=\"font-family: '-apple-system', 'HelveticaNeue'; font-size: %f\">%@</span>", self.font!.pointSize, htmlText)
        let data = modifiedFont.data(using: String.Encoding.utf8, allowLossyConversion: true)!
        let options: [NSAttributedString.DocumentReadingOptionKey: Any] = [
            .documentType: NSAttributedString.DocumentType.html,
            .characterEncoding: String.Encoding.utf8.rawValue
        ]
        if let attributedString = try? NSAttributedString(data: data, options: options, documentAttributes: nil) {
            self.attributedText = attributedString
        }
    }
}