AppState.swift

1import AppKit2import Combine3import Foundation45enum AppTab {6  case explore7  case local8  case favorites9  case history10  case settings11}1213/// Browse mode for the Explore tab. Each maps to a Wallhaven `sorting`14/// value; the free-text search box applies on top of the chosen mode.15enum FeedMode: String, CaseIterable, Identifiable {16  case latest17  case toplist18  case random1920  var id: String { rawValue }2122  var sorting: WallhavenSorting {23    switch self {24    case .latest: return .dateAdded25    case .toplist: return .toplist26    case .random: return .random27    }28  }2930  var displayName: String {31    switch self {32    case .latest: return "Latest"33    case .toplist: return "Toplist"34    case .random: return "Random"35    }36  }3738  var systemImage: String {39    switch self {40    case .latest: return "clock"41    case .toplist: return "diamond"42    case .random: return "arrow.triangle.2.circlepath"43    }44  }45}4647@MainActor48class AppState: ObservableObject {49  // Navigation50  @Published var activeTab: AppTab = .explore5152  // Data Sources53  @Published var wallpapers: [Wallpaper] = []54  @Published var favoritesManager = FavoritesManager.shared55  @Published var historyManager = HistoryManager.shared5657  // Search & Filter58  @Published var feedMode: FeedMode = .latest59  @Published var searchText: String = ""60  @Published var selectedResolution: String = ""61  @Published var selectedRatio: String = ""62  @Published var isLoading: Bool = false63  @Published var errorMessage: String?6465  // Pagination66  @Published var canLoadMore = true67  private var currentPage = 168  private var isFetchingMore = false6970  // Settings71  @Published var saveToFolderEnabled: Bool {72    didSet { UserDefaults.standard.set(saveToFolderEnabled, forKey: "saveToFolderEnabled") }73  }74  @Published var saveFolderPath: String {75    didSet { UserDefaults.standard.set(saveFolderPath, forKey: "saveFolderPath") }76  }77  @Published var launchAtLogin: Bool {78    didSet { autostartManager.isEnabled = launchAtLogin }79  }8081  // Filters82  @Published var categories: (general: Bool, anime: Bool, people: Bool) = (true, true, true)83  @Published var purity: (sfw: Bool, sketchy: Bool) = (true, false)8485  let availableResolutions = ["Any", "1920x1080", "2560x1440", "3840x2160", "5120x2880"]86  let availableRatios = ["Any", "16x9", "16x10", "21x9", "32x9", "4x3"]8788  private let api: WallhavenSearching89  private let wallpaperManager: WallpaperManaging90  private let autostartManager: AutostartManaging91  private let chooseFolder: @MainActor (URL, @escaping (URL?) -> Void) -> Void92  private let terminateApplication: @MainActor () -> Void93  private var cancellables = Set<AnyCancellable>()94  // Monotonic token incremented on every reset; only the search started with95  // the latest token may commit results. This keeps a slow older request from96  // overwriting the wallpapers/canLoadMore/errorMessage after a newer search97  // (or pagination) has begun.98  private var searchGeneration: UInt64 = 099100  init(101    api: WallhavenSearching? = nil,102    wallpaperManager: WallpaperManaging? = nil,103    autostartManager: AutostartManaging? = nil,104    chooseFolder: (@MainActor (URL, @escaping (URL?) -> Void) -> Void)? = nil,105    terminateApplication: (@MainActor () -> Void)? = nil,106    observeChanges: Bool = true107  ) {108    let api = api ?? WallhavenAPI()109    let wallpaperManager = wallpaperManager ?? WallpaperManager.shared110    let autostartManager = autostartManager ?? AutostartManager.shared111    self.api = api112    self.wallpaperManager = wallpaperManager113    self.autostartManager = autostartManager114    self.chooseFolder = chooseFolder ?? AppState.presentFolderPicker115    self.terminateApplication = terminateApplication ?? { NSApp.terminate(nil) }116    self.launchAtLogin = autostartManager.isEnabled117    // Load settings118    self.saveToFolderEnabled = UserDefaults.standard.bool(forKey: "saveToFolderEnabled")119    if let path = UserDefaults.standard.string(forKey: "saveFolderPath") {120      self.saveFolderPath = path121    } else {122      let pictures = FileManager.default.urls(for: .picturesDirectory, in: .userDomainMask).first!123      self.saveFolderPath = pictures.appendingPathComponent("Haven").path124    }125126    guard observeChanges else { return }127128    // Debounce search129    $searchText130      .debounce(for: .seconds(0.5), scheduler: DispatchQueue.main)131      .sink { [weak self] _ in self?.scheduleSearch() }132      .store(in: &cancellables)133134    // Observe filters135    $categories136      .map { _ in () }137      .debounce(for: .seconds(0.5), scheduler: DispatchQueue.main)138      .sink { [weak self] _ in Task { await self?.fetchWallpapers() } }139      .store(in: &cancellables)140141    $purity142      .map { _ in () }143      .debounce(for: .seconds(0.5), scheduler: DispatchQueue.main)144      .sink { [weak self] _ in Task { await self?.fetchWallpapers() } }145      .store(in: &cancellables)146147    $feedMode148      .dropFirst()149      .sink { [weak self] _ in150        Task { [weak self] in await self?.fetchWallpapers(reset: true) }151      }152      .store(in: &cancellables)153154    updateLocalWallpapersMonitoring()155156    $saveToFolderEnabled157      .dropFirst()158      .sink { [weak self] _ in159        self?.updateLocalWallpapersMonitoring()160      }161      .store(in: &cancellables)162163    $saveFolderPath164      .dropFirst()165      .sink { [weak self] _ in166        self?.updateLocalWallpapersMonitoring()167      }168      .store(in: &cancellables)169  }170171  private func updateLocalWallpapersMonitoring() {172    if saveToFolderEnabled {173      LocalWallpapersManager.shared.startMonitoring(folderPath: saveFolderPath)174    } else {175      LocalWallpapersManager.shared.stopMonitoring()176    }177  }178179  func scheduleSearch() { Task { [weak self] in await self?.fetchWallpapers() } }180181  func fetchWallpapers(reset: Bool = true, refreshing: Bool = false) async {182    if reset {183      searchGeneration &+= 1184    }185    let requestGeneration = searchGeneration186    let pageToRequest: Int187    if reset {188      if !refreshing {189        isLoading = true190        wallpapers = []191      }192      errorMessage = nil193      currentPage = 1194      canLoadMore = true195      pageToRequest = 1196    } else {197      guard !isFetchingMore && canLoadMore else { return }198      isFetchingMore = true199      pageToRequest = currentPage200    }201202    do {203      let resolutions =204        selectedResolution == "Any" || selectedResolution.isEmpty ? [] : [selectedResolution]205      let ratios = selectedRatio == "Any" || selectedRatio.isEmpty ? [] : [selectedRatio]206207      // Construct bitstrings208      let catStr =209        "\(categories.general ? "1" : "0")\(categories.anime ? "1" : "0")\(categories.people ? "1" : "0")"210      // NSFW is intentionally unsupported; the third purity bit is always 0.211      let purityStr = "\(purity.sfw ? "1" : "0")\(purity.sketchy ? "1" : "0")0"212213      let (newWallpapers, meta) = try await api.searchWallpapers(214        query: searchText,215        categories: catStr,216        purity: purityStr,217        sorting: feedMode.sorting,218        resolutions: resolutions,219        ratios: ratios,220        limit: 24,221        page: pageToRequest222      )223224      if requestGeneration != searchGeneration { return }225      if reset {226        self.wallpapers = newWallpapers227      } else {228        self.wallpapers.append(contentsOf: newWallpapers)229      }230231      if let meta = meta {232        let nextPage = meta.current_page + 1233        self.canLoadMore = meta.current_page < meta.last_page234        // A page that's been superseded by a newer reset would leave the next235        // page index pointing into the stale query; only advance when this236        // response is still the current generation.237        if requestGeneration == searchGeneration {238          self.currentPage = nextPage239        }240      } else if !newWallpapers.isEmpty {241        self.canLoadMore = true242        if requestGeneration == searchGeneration {243          self.currentPage += 1244        }245      } else {246        self.canLoadMore = false247      }248249    } catch {250      if reset && requestGeneration == searchGeneration {251        self.errorMessage = error.localizedDescription252      }253    }254255    if reset {256      if requestGeneration == searchGeneration {257        isLoading = false258      }259    } else if requestGeneration == searchGeneration {260      isFetchingMore = false261    }262  }263264  func loadMore() async {265    await fetchWallpapers(reset: false)266  }267268  func setWallpaper(_ wallpaper: Wallpaper, on screen: NSScreen? = nil) async {269    guard let remoteURL = URL(string: wallpaper.path) else {270      self.errorMessage = "Failed to set wallpaper: invalid image URL"271      return272    }273    do {274      let localURL = try await wallpaperManager.download(from: remoteURL)275276      try await MainActor.run {277        try wallpaperManager.setDesktopImage(from: localURL, screen: screen)278      }279280      // Add to history281      historyManager.addToHistory(wallpaper)282283      if saveToFolderEnabled {284        let destFolder = URL(fileURLWithPath: saveFolderPath)285        try wallpaperManager.saveToFolder(from: localURL, to: destFolder)286      }287288    } catch {289      self.errorMessage = "Failed to set wallpaper: \(error.localizedDescription)"290    }291  }292293  func setLocalWallpaper(_ wallpaper: LocalWallpaper, on screen: NSScreen? = nil) async {294    do {295      try await MainActor.run {296        try wallpaperManager.setDesktopImage(from: wallpaper.url, screen: screen)297      }298299      let historyWallpaper = Wallpaper(300        id: wallpaper.id,301        url: wallpaper.url.path,302        path: wallpaper.url.path,303        resolution: wallpaper.resolution,304        purity: "local",305        file_size: Int(wallpaper.fileSize),306        thumbs: Wallpaper.Thumbs(307          large: wallpaper.url.path,308          original: wallpaper.url.path,309          small: wallpaper.url.path310        )311      )312      historyManager.addToHistory(historyWallpaper)313314    } catch {315      self.errorMessage = "Failed to set wallpaper: \(error.localizedDescription)"316    }317  }318319  func downloadWallpaper(_ wallpaper: Wallpaper) async {320    guard let remoteURL = URL(string: wallpaper.path) else {321      self.errorMessage = "Failed to download: invalid image URL"322      return323    }324    do {325      let localURL = try await wallpaperManager.download(from: remoteURL)326327      // Always save to folder if download requested, or ensure save folder is used328      let destFolder = URL(fileURLWithPath: saveFolderPath)329      try wallpaperManager.saveToFolder(from: localURL, to: destFolder)330331    } catch {332      self.errorMessage = "Failed to download: \(error.localizedDescription)"333    }334  }335336  func selectSaveFolder() {337    // Hold the transient popover open; without this the picker steals focus338    // and the popover closes before a folder can be chosen.339    MenuController.shared?.beginModalPresentation()340    NSApp.activate(ignoringOtherApps: true)341342    chooseFolder(URL(fileURLWithPath: saveFolderPath)) { url in343      if let url { self.saveFolderPath = url.path }344      MenuController.shared?.endModalPresentation()345    }346  }347348  static func makeFolderPanel(at directory: URL) -> NSOpenPanel {349    let panel = NSOpenPanel()350    panel.canChooseFiles = false351    panel.canChooseDirectories = true352    panel.canCreateDirectories = true353    panel.allowsMultipleSelection = false354    panel.directoryURL = directory355    panel.prompt = "Choose"356    return panel357  }358359  static func presentFolderPicker(360    at directory: URL, completion: @escaping (URL?) -> Void361  ) {362    presentFolderPicker(panel: makeFolderPanel(at: directory), completion: completion)363  }364365  static func presentFolderPicker(366    panel: NSOpenPanel, completion: @escaping (URL?) -> Void367  ) {368    panel.begin { response in completion(response == .OK ? panel.url : nil) }369  }370371  func quit() {372    terminateApplication()373  }374}