ContentItemView.swift

//
//  ContentItemView.swift
//  AeroBuddy
//
//  Created by Kieran Samuel Cross on 25/12/2019.
//  Copyright © 2019 Luke Collister. All rights reserved.
//

import UIKit
import SwiftSoup
import AVKit
import AVFoundation

class ContentItemView: UIView {

    @IBOutlet weak var ContentTitle: UILabel!
    @IBOutlet weak var ContentText: UITextView!

    var currentContent = 0
    var videoURL: String?
    var contentList: [Content]!

    @objc func buttonAction(sender: UIButton!) {
        let videoURL2 = URL(string: videoURL!)
        let player = AVPlayer(url: videoURL2!)
        let playerLayer = AVPlayerLayer(player: player)
        playerLayer.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)
        playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
        self.view.layer.addSublayer(playerLayer)
        player.play()
    }


    func reload() {
        // Set the title
        ContentTitle.text = contentList[currentContent].title

        // Set the content text
        let htmlString = contentList[currentContent].content

        do {
            // Parse HTML
            guard let doc: Document = try? SwiftSoup.parse(htmlString!) else { return }
            // Create an NSMutableAttributedString that we'll append everything to
            let fullString = NSMutableAttributedString(string: "")

            // Get all images and videos from HTML content, adding them to the "full string"
            for element in try doc.select(".content").array() {
                if (element.tagName() == "img") {
                    // It's an image
                    let image1Attachment = NSTextAttachment()
                    image1Attachment.image = convertBase64ToImage(imageString: try element.attr("src"))
                    let image1String = NSAttributedString(attachment: image1Attachment)
                    fullString.append(image1String)
                } else if (element.tagName() == "abv") {
                    // It's a video

                    // Insert a play symbol
                    let videoAttachment = NSTextAttachment()
                    videoAttachment.image = UIImage(named: "first.png")
                    var videoString = NSAttributedString(attachment: videoAttachment)
                    fullString.append(videoString)

                    videoURL = try element.attr("src")
                } else {
                    // It's not an image or video
                    let div_data = try element.html().data(using: String.Encoding.unicode)!
                    let formattedString = try? NSAttributedString(
                    data: div_data,
                    options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html],
                    documentAttributes: nil)
                    fullString.append(formattedString!)
                }
            }
            ContentText.attributedText = fullString
            if !videoURL!.isEmpty {
                // Make button and add to contenttext
                let buttonHeight: CGFloat = 44
                let contentInset: CGFloat = 8

                //inset the textView
                ContentText.textContainerInset = UIEdgeInsets(top: contentInset, left: contentInset, bottom: (buttonHeight+contentInset*2), right: contentInset)

                let button = UIButton(frame: CGRect(x: contentInset, y: ContentText.contentSize.height - buttonHeight - contentInset, width: ContentText.contentSize.width-contentInset*2, height: buttonHeight))

                button.backgroundColor = .green
                button.setTitle("Test Button", for: .normal)
                button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)

                ContentText.addSubview(button)
            }
            print(ContentTitle!, " ATTR STRING: ", ContentText.attributedText!)
        } catch {
            print("There was an error parsing the HTML")
        }
    }
}

func convertBase64ToImage(imageString: String) -> UIImage {
    let imageString2 = String( imageString.dropFirst(22))
    let imageData = Data(base64Encoded: imageString2, options: Data.Base64DecodingOptions.ignoreUnknownCharacters)!
    return UIImage(data: imageData)!
}