105 lines
3.5 KiB
Swift
105 lines
3.5 KiB
Swift
import Foundation
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import SwiftUI
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/// 搜索 ViewModel
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@MainActor
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class SearchViewModel: ObservableObject {
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/// 搜索关键词输入。
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@Published var keyword: String = ""
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/// 当前结果列表。
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@Published var results: [Movie.Video] = []
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/// 搜索加载状态，用于控制进度指示器。
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@Published var isSearching = false
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/// 本地搜索历史（最近在前）。
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@Published var searchHistory: [String] = []
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/// 搜索失败或空结果提示。
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@Published var errorMessage: String?
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/// 源数据服务（负责多源并发搜索）。
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private let sourceService = SourceService.shared
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/// 搜索请求序号（用于丢弃过期异步结果）。
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private var latestSearchRequestId: UUID = UUID()
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/// 初始化时同步加载本地历史记录，确保搜索页首次渲染即可展示。
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init() {
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loadSearchHistory()
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}
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/// 执行搜索
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func search() async {
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let trimmed = keyword.trimmingCharacters(in: .whitespacesAndNewlines)
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guard !trimmed.isEmpty else { return }
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let requestId = UUID()
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latestSearchRequestId = requestId
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isSearching = true
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errorMessage = nil
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results = []
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// 搜索一旦触发就先落历史，保持行为与移动端常见搜索体验一致。
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addToHistory(trimmed)
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// 走多源并发搜索，返回聚合后的影片列表。
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let videos = await sourceService.searchAll(keyword: trimmed)
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guard requestId == latestSearchRequestId else { return }
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self.results = videos
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if videos.isEmpty {
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errorMessage = "未找到相关内容"
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}
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isSearching = false
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}
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/// 在指定源搜索
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func searchInSource(_ source: SourceBean) async {
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let trimmed = keyword.trimmingCharacters(in: .whitespacesAndNewlines)
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guard !trimmed.isEmpty else { return }
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let requestId = UUID()
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latestSearchRequestId = requestId
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isSearching = true
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errorMessage = nil
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do {
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let videos = try await sourceService.search(sourceBean: source, keyword: trimmed)
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guard requestId == latestSearchRequestId else { return }
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self.results = videos
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} catch {
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guard requestId == latestSearchRequestId else { return }
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errorMessage = error.localizedDescription
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}
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isSearching = false
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}
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// MARK: - 搜索历史
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/// 从本地读取历史。
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private func loadSearchHistory() {
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searchHistory = UserDefaults.standard.stringArray(forKey: HawkConfig.SEARCH_HISTORY) ?? []
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}
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/// 新增历史项并去重，最多保留 20 条。
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private func addToHistory(_ keyword: String) {
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searchHistory.removeAll { $0 == keyword }
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searchHistory.insert(keyword, at: 0)
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if searchHistory.count > 20 {
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searchHistory = Array(searchHistory.prefix(20))
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}
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UserDefaults.standard.set(searchHistory, forKey: HawkConfig.SEARCH_HISTORY)
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}
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/// 清空历史。
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func clearHistory() {
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searchHistory = []
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UserDefaults.standard.removeObject(forKey: HawkConfig.SEARCH_HISTORY)
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}
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/// 删除单条历史。
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func removeFromHistory(_ keyword: String) {
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searchHistory.removeAll { $0 == keyword }
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UserDefaults.standard.set(searchHistory, forKey: HawkConfig.SEARCH_HISTORY)
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}
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}
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