SimpleAudioVC.swift

//
//  SimpleAudioDelegate.swift
//  ModernAVPlayer_Example
//
//  Created by ankierman on 16/10/2019.
//  Copyright © 2019 CocoaPods. All rights reserved.
//

import ModernAVPlayer
import UIKit

final class SimpleAudioVC: UIViewController {

    enum InputSource {
        case URL
        case AVPlayerItem
    }

    // MARK: - Inputs

    private let player: ModernAVPlayer = {
        let conf = PlayerConfigurationExample()
        return ModernAVPlayer(config: conf, loggerDomains: [.error, .unavailableCommand])
    }()
    private let dataSource: [MediaResource] = [.live, .remote, .local, .invalid]
    var inputSource: InputSource!

    // MARK: - Interface Buidler

    @IBOutlet weak private var stateLabel: UILabel!
    @IBOutlet weak private var timingLabel: UILabel!
    @IBOutlet weak private var mediaPicker: UIPickerView!
    
    // MARK: - LifeCycle

    override func viewDidLoad() {
        super.viewDidLoad()

        title = "Simple Audio"
        player.delegate = self
        mediaPicker.dataSource = self
        mediaPicker.delegate = self

        let media =  getMedia(index: 0)
        player.load(media: media, autostart: false)
    }

    private func getMedia(index: Int) -> PlayerMedia {
        switch inputSource {
        case .URL:
            return dataSource[index].playerMedia
        case .AVPlayerItem:
            return dataSource[index].playerMediaFromItem!
        default:
            preconditionFailure()
        }
    }

    // MARK: - Commands

    @IBAction func play(_ sender: UIButton) {
        player.play()
    }

    @IBAction func pause(_ sender: UIButton) {
        player.pause()
    }

    @IBAction func stop(_ sender: Any) {
        player.stop()
    }

    @IBAction func loop(_ sender: UIButton) {
        player.loopMode = !player.loopMode
        sender.isSelected = player.loopMode
    }

    @IBAction func prevSeek(_ sender: UIButton) {
        player.seek(offset: -15)
    }

    @IBAction func nextSeek(_ sender: UIButton) {
        player.seek(offset: +15)
    }
}

extension SimpleAudioVC: ModernAVPlayerDelegate {
    func modernAVPlayer(_ player: ModernAVPlayer, didStateChange state: ModernAVPlayer.State) {
        DispatchQueue.main.async { self.stateLabel.text = "State: " + state.description }
    }

    func modernAVPlayer(_ player: ModernAVPlayer, didCurrentTimeChange currentTime: Double) {
        DispatchQueue.main.async { self.timingLabel.text = "Timing: " + String(format: "%.2f", currentTime) }
    }
}

extension SimpleAudioVC: UIPickerViewDataSource {
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return dataSource.count
    }
}

extension SimpleAudioVC: UIPickerViewDelegate {
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return dataSource[row].description
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        let media =  getMedia(index: row)
        player.load(media: media, autostart: false)
    }
}