HistoryManager.swift

1import Foundation23class HistoryManager: ObservableObject {4    static let shared = HistoryManager()5    6    @Published var history: [Wallpaper] = []7    private let key = "wallpaperHistory"8    private let maxHistoryItems = 509    10    init() {11        loadHistory()12    }13    14    func addToHistory(_ wallpaper: Wallpaper) {15        // Remove if existing to promote to top16        if let index = history.firstIndex(where: { $0.id == wallpaper.id }) {17            history.remove(at: index)18        }19        20        history.insert(wallpaper, at: 0)21        22        if history.count > maxHistoryItems {23            history = Array(history.prefix(maxHistoryItems))24        }25        26        saveHistory()27    }28    29    func clearHistory() {30        history = []31        saveHistory()32    }33    34    private func saveHistory() {35        if let data = try? JSONEncoder().encode(history) {36            UserDefaults.standard.set(data, forKey: key)37        }38    }39    40    private func loadHistory() {41        if let data = UserDefaults.standard.data(forKey: key),42           let decoded = try? JSONDecoder().decode([Wallpaper].self, from: data) {43            history = decoded44        }45    }46}