David Chavez
121 lines
4.2 KiB
Swift
121 lines
4.2 KiB
Swift
//
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// PlayerViewModel.swift
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// SwiftAudio
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//
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// Created by David Chavez on 4/12/24.
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//
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import SwiftAudioEx
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#if os(macOS)
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import AppKit
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public typealias NativeImage = NSImage
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#elseif os(iOS)
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import UIKit
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public typealias NativeImage = UIImage
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#endif
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extension PlayerView {
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final class ViewModel: ObservableObject {
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// MARK: - Observables
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@Published var playing: Bool = false
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@Published var position: Double = 0
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@Published var artwork: NativeImage? = nil
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@Published var title: String = ""
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@Published var artist: String = ""
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@Published var maxTime: TimeInterval = 100
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@Published var isScrubbing: Bool = false
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@Published var elapsedTime: String = "00:00"
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@Published var remainingTime: String = "00:00"
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@Published var playWhenReady: Bool = false
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@Published var playbackState: AudioPlayerState = .idle
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// MARK: - Properties
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let controller = AudioController.shared
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// MARK: - Initializer
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init() {
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controller.player.event.playWhenReadyChange.addListener(self, handlePlayWhenReadyChange)
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controller.player.event.stateChange.addListener(self, handleAudioPlayerStateChange)
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controller.player.event.playbackEnd.addListener(self, handleAudioPlayerPlaybackEnd(data:))
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controller.player.event.secondElapse.addListener(self, handleAudioPlayerSecondElapsed)
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controller.player.event.seek.addListener(self, handleAudioPlayerDidSeek)
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controller.player.event.updateDuration.addListener(self, handleAudioPlayerUpdateDuration)
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controller.player.event.didRecreateAVPlayer.addListener(self, handleAVPlayerRecreated)
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}
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// MARK: - Updates
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private func render() {
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DispatchQueue.main.async { [weak self] in
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guard let self else { return }
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playing = (controller.player.playerState == .playing)
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playbackState = controller.player.playerState
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playWhenReady = controller.player.playWhenReady
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position = controller.player.currentTime
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maxTime = controller.player.duration
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artist = controller.player.currentItem?.getArtist() ?? ""
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title = controller.player.currentItem?.getTitle() ?? ""
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elapsedTime = controller.player.currentTime.secondsToString()
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remainingTime = (controller.player.duration - controller.player.currentTime).secondsToString()
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if let item = controller.player.currentItem as? DefaultAudioItem {
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artwork = item.artwork
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} else {
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artwork = nil
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}
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}
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}
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private func renderTimes() {
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DispatchQueue.main.async { [weak self] in
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guard let self else { return }
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position = controller.player.currentTime
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maxTime = controller.player.duration
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elapsedTime = controller.player.currentTime.secondsToString()
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remainingTime = (controller.player.duration - controller.player.currentTime).secondsToString()
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print(elapsedTime)
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}
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}
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// MARK: - AudioPlayer Event Handlers
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func handleAudioPlayerStateChange(data: AudioPlayer.StateChangeEventData) {
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print("state=\(data)")
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render()
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}
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func handlePlayWhenReadyChange(data: AudioPlayer.PlayWhenReadyChangeData) {
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print("playWhenReady=\(data)")
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render()
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}
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func handleAudioPlayerPlaybackEnd(data: AudioPlayer.PlaybackEndEventData) {
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print("playEndReason=\(data)")
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}
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func handleAudioPlayerSecondElapsed(data: AudioPlayer.SecondElapseEventData) {
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if !isScrubbing {
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renderTimes()
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}
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}
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func handleAudioPlayerDidSeek(data: AudioPlayer.SeekEventData) {
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// .. don't need this
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}
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func handleAudioPlayerUpdateDuration(data: AudioPlayer.UpdateDurationEventData) {
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if !isScrubbing {
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renderTimes()
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}
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}
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func handleAVPlayerRecreated() {
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// .. don't need this
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}
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}
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}
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