VideoPlayerContainer/VideoNavigation-Example/FeedsViewModel.swift at main · shayanbo/VideoPlayerContainer · GitHub

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//
//  FeedsViewModel.swift
//  VideoNavigation-Example
//
//  Created by shayanbo on 2023/7/21.
//

import Foundation
import AVKit
import VideoPlayerContainer
import SwiftUI

class FeedsViewModel : ObservableObject {

    //MARK: Navigation

    @Published var navigator = NavigationPath()

    var navigatorBinding: Binding<NavigationPath> {
        Binding {
            self.navigator
        } set: {
            self.navigator = $0
        }
    }

    func push(_ video: Video) {
        navigator.append(video)
    }

    //MARK: Search

    @Published var searchText = ""

    var searchTextBinding: Binding<String> {
        Binding {
            self.searchText
        } set: {
            self.searchText = $0
        }
    }

    //MARK: Video Data

    @Published var videos = [Video]()

    init() {
        guard let feedsUrl = Bundle.main.url(forResource: "feeds", withExtension: "json") else {
            return
        }
        let decoder = JSONDecoder()
        decoder.keyDecodingStrategy = .convertFromSnakeCase
        guard let data = try? Data(contentsOf: feedsUrl) else {
            return
        }

        do {
            self.videos = try decoder.decode([Video].self, from: data)
        } catch {
            print(error)
        }
    }

    //MARK: Context

    private var contexts = [Video: Context]()

    func context(video: Video) -> Context {
        if let context = contexts[video] {
            return context
        } else {
            let context = Context()
            contexts[video] = context
            return context
        }
    }

    //MARK: Active Video

    var activeVideo: Video? {
        willSet {
            guard activeVideo != newValue else { return }

            if let activeVideo = activeVideo {
                let ctx = context(video: activeVideo)
                let player = ctx[RenderService.self].player
                if player.rate > 0 {
                    player.pause()
                }
            }
            if let newValue = newValue {
                let ctx = context(video: newValue)
                let player = ctx[RenderService.self].player
                if player.currentItem == nil {
                    let item = AVPlayerItem(url: Bundle.main.url(forResource: "demo", withExtension: "mp4")!)
                    player.replaceCurrentItem(with: item)
                    player.play()
                } else {
                    player.play()
                }
            }
        }
    }
}