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      isFetchingMore = false184      searchGeneration &+= 1185    }186    let requestGeneration = searchGeneration187    let pageToRequest: Int188    if reset {189      if !refreshing {190        isLoading = true191        wallpapers = []192      }193      errorMessage = nil194      currentPage = 1195      canLoadMore = true196      pageToRequest = 1197    } else {198      guard !isFetchingMore && canLoadMore else { return }199      isFetchingMore = true200      pageToRequest = currentPage201    }202203    do {204      let resolutions =205        selectedResolution == "Any" || selectedResolution.isEmpty ? [] : [selectedResolution]206      let ratios = selectedRatio == "Any" || selectedRatio.isEmpty ? [] : [selectedRatio]207208      // Construct bitstrings209      let catStr =210        "\(categories.general ? "1" : "0")\(categories.anime ? "1" : "0")\(categories.people ? "1" : "0")"211      // NSFW is intentionally unsupported; the third purity bit is always 0.212      let purityStr = "\(purity.sfw ? "1" : "0")\(purity.sketchy ? "1" : "0")0"213214      let (newWallpapers, meta) = try await api.searchWallpapers(215        query: searchText,216        categories: catStr,217        purity: purityStr,218        sorting: feedMode.sorting,219        resolutions: resolutions,220        ratios: ratios,221        limit: 24,222        page: pageToRequest223      )224225      if requestGeneration != searchGeneration { return }226      if reset {227        self.wallpapers = newWallpapers228      } else {229        self.wallpapers.append(contentsOf: newWallpapers)230      }231232      if let meta = meta {233        let nextPage = meta.current_page + 1234        self.canLoadMore = meta.current_page < meta.last_page235        // A page that's been superseded by a newer reset would leave the next236        // page index pointing into the stale query; only advance when this237        // response is still the current generation.238        if requestGeneration == searchGeneration {239          self.currentPage = nextPage240        }241      } else if !newWallpapers.isEmpty {242        self.canLoadMore = true243        if requestGeneration == searchGeneration {244          self.currentPage += 1245        }246      } else {247        self.canLoadMore = false248      }249250    } catch {251      if reset && requestGeneration == searchGeneration {252        self.errorMessage = error.localizedDescription253      }254    }255256    if reset {257      if requestGeneration == searchGeneration {258        isLoading = false259      }260    } else if requestGeneration == searchGeneration {261      isFetchingMore = false262    }263  }264265  func loadMore() async {266    await fetchWallpapers(reset: false)267  }268269  func setWallpaper(_ wallpaper: Wallpaper, on screen: NSScreen? = nil) async {270    guard let remoteURL = URL(string: wallpaper.path) else {271      self.errorMessage = "Failed to set wallpaper: invalid image URL"272      return273    }274    do {275      let localURL = try await wallpaperManager.download(from: remoteURL)276277      try await MainActor.run {278        try wallpaperManager.setDesktopImage(from: localURL, screen: screen)279      }280281      // Add to history282      historyManager.addToHistory(wallpaper)283284      if saveToFolderEnabled {285        let destFolder = URL(fileURLWithPath: saveFolderPath)286        try wallpaperManager.saveToFolder(from: localURL, to: destFolder)287      }288289    } catch {290      self.errorMessage = "Failed to set wallpaper: \(error.localizedDescription)"291    }292  }293294  func setLocalWallpaper(_ wallpaper: LocalWallpaper, on screen: NSScreen? = nil) async {295    do {296      try await MainActor.run {297        try wallpaperManager.setDesktopImage(from: wallpaper.url, screen: screen)298      }299300      let historyWallpaper = Wallpaper(301        id: wallpaper.id,302        url: wallpaper.url.path,303        path: wallpaper.url.path,304        resolution: wallpaper.resolution,305        purity: "local",306        file_size: Int(wallpaper.fileSize),307        thumbs: Wallpaper.Thumbs(308          large: wallpaper.url.path,309          original: wallpaper.url.path,310          small: wallpaper.url.path311        )312      )313      historyManager.addToHistory(historyWallpaper)314315    } catch {316      self.errorMessage = "Failed to set wallpaper: \(error.localizedDescription)"317    }318  }319320  func downloadWallpaper(_ wallpaper: Wallpaper) async {321    guard let remoteURL = URL(string: wallpaper.path) else {322      self.errorMessage = "Failed to download: invalid image URL"323      return324    }325    do {326      let localURL = try await wallpaperManager.download(from: remoteURL)327328      // Always save to folder if download requested, or ensure save folder is used329      let destFolder = URL(fileURLWithPath: saveFolderPath)330      try wallpaperManager.saveToFolder(from: localURL, to: destFolder)331332    } catch {333      self.errorMessage = "Failed to download: \(error.localizedDescription)"334    }335  }336337  func selectSaveFolder() {338    // Hold the transient popover open; without this the picker steals focus339    // and the popover closes before a folder can be chosen.340    MenuController.shared?.beginModalPresentation()341    NSApp.activate(ignoringOtherApps: true)342343    chooseFolder(URL(fileURLWithPath: saveFolderPath)) { url in344      if let url { self.saveFolderPath = url.path }345      MenuController.shared?.endModalPresentation()346    }347  }348349  static func makeFolderPanel(at directory: URL) -> NSOpenPanel {350    let panel = NSOpenPanel()351    panel.canChooseFiles = false352    panel.canChooseDirectories = true353    panel.canCreateDirectories = true354    panel.allowsMultipleSelection = false355    panel.directoryURL = directory356    panel.prompt = "Choose"357    return panel358  }359360  static func presentFolderPicker(361    at directory: URL, completion: @escaping (URL?) -> Void362  ) {363    presentFolderPicker(panel: makeFolderPanel(at: directory), completion: completion)364  }365366  static func presentFolderPicker(367    panel: NSOpenPanel, completion: @escaping (URL?) -> Void368  ) {369    panel.begin { response in completion(response == .OK ? panel.url : nil) }370  }371372  func quit() {373    terminateApplication()374  }375}