first commit

tvbox/ViewModels/LiveViewModel.swift

@@ -0,0 +1,91 @@
+import Foundation
+import SwiftUI
+
+/// 直播 ViewModel
+@MainActor
+class LiveViewModel: ObservableObject {
+    @Published var channelGroups: [LiveChannelGroup] = []
+    @Published var selectedGroupIndex: Int = 0
+    @Published var selectedChannelIndex: Int = 0
+    @Published var currentChannel: LiveChannelItem?
+    @Published var epgList: [Epginfo] = []
+    @Published var isLoading = false
+    @Published var showChannelList = false
+    
+    /// 加载直播频道
+    func loadChannels() {
+        self.channelGroups = ApiConfig.shared.liveChannelGroupList
+        if let firstGroup = channelGroups.first, let firstChannel = firstGroup.channels.first {
+            currentChannel = firstChannel
+        }
+    }
+    
+    /// 选择频道分组
+    func selectGroup(_ index: Int) {
+        guard index >= 0, index < channelGroups.count else { return }
+        selectedGroupIndex = index
+        selectedChannelIndex = 0
+        if let first = channelGroups[index].channels.first {
+            selectChannel(first)
+        }
+    }
+    
+    /// 选择频道
+    func selectChannel(_ channel: LiveChannelItem) {
+        currentChannel = channel
+        loadEPG(for: channel)
+    }
+    
+    /// 上一个频道
+    func previousChannel() {
+        guard !channelGroups.isEmpty else { return }
+        if selectedChannelIndex > 0 {
+            selectedChannelIndex -= 1
+        } else if selectedGroupIndex > 0 {
+            selectedGroupIndex -= 1
+            selectedChannelIndex = channelGroups[selectedGroupIndex].channels.count - 1
+        }
+        if let ch = channelGroups[selectedGroupIndex].channels[safe: selectedChannelIndex] {
+            selectChannel(ch)
+        }
+    }
+    
+    /// 下一个频道
+    func nextChannel() {
+        guard !channelGroups.isEmpty else { return }
+        let group = channelGroups[selectedGroupIndex]
+        if selectedChannelIndex < group.channels.count - 1 {
+            selectedChannelIndex += 1
+        } else if selectedGroupIndex < channelGroups.count - 1 {
+            selectedGroupIndex += 1
+            selectedChannelIndex = 0
+        }
+        if let ch = channelGroups[selectedGroupIndex].channels[safe: selectedChannelIndex] {
+            selectChannel(ch)
+        }
+    }
+    
+    /// 切换线路
+    func switchSource() {
+        currentChannel?.nextSource()
+    }
+    
+    /// 当前频道列表
+    var currentChannels: [LiveChannelItem] {
+        guard selectedGroupIndex < channelGroups.count else { return [] }
+        return channelGroups[selectedGroupIndex].channels
+    }
+    
+    /// 加载 EPG 节目单
+    private func loadEPG(for channel: LiveChannelItem) {
+        // EPG 加载 - 简化实现
+        epgList = []
+    }
+}
+
+// 安全数组下标访问
+extension Collection {
+    subscript(safe index: Index) -> Element? {
+        indices.contains(index) ? self[index] : nil
+    }
+}