SwiftUI crypto app — rasmlarni FileManager-ga saqlash

import Foundation
import SwiftUI

class LocalFileManager {

    // Singleton ob'ekti
    static let instance = LocalFileManager()

    private init() {}

    // Rasm faylini FileManager-ga saqlash
    func saveImage(image: UIImage, imageName: String, folderName: String) {

        // Agar papka mavjud bo'lmasa, uni yaratamiz
        createFolderIfNeeded(folderName: folderName)

        // Rasm ma'lumotlarini PNG formatida olamiz
        guard
            let data = image.pngData(),
            let url = getURLForImage(imageName: imageName, folderName: folderName)
        else { return }

        // Ma'lumotni olingan URL manziliga yozamiz
        do {
            try data.write(to: url)
        } catch let error {
            print("Rasm saqlashda xatolik yuz berdi. Image: \(imageName). Error: \(error)")
        }
    }

    // Rasm faylini FileManager-dan olish
    func getImage(imageName: String, folderName: String) -> UIImage? {
        guard
            let url = getURLForImage(imageName: imageName, folderName: folderName),
            FileManager.default.fileExists(atPath: url.path) // Fayl mavjudligini tekshiramiz
        else { return nil }

        // Fayl yo'li orqali UIImage obyektini yaratib qaytaramiz
        return UIImage(contentsOfFile: url.path)
    }

    // Kerak bo'lsa yangi papka yaratish funksiyasi
    private func createFolderIfNeeded(folderName: String) {
        guard let url = getURLForFolder(folderName: folderName) else { return }

        // Papka mavjudligini tekshirib, yo'q bo'lsa yaratamiz
        if !FileManager.default.fileExists(atPath: url.path) {
            do {
                try FileManager.default.createDirectory(at: url, withIntermediateDirectories: true, attributes: nil)
            } catch let error {
                print("Papka yaratishda xatolik yuz berdi. Folder: \(folderName). Error: \(error)")
            }
        }
    }

    // Papka uchun URL manzilini olish (CachesDirectory ichida)
    private func getURLForFolder(folderName: String) -> URL? {
        guard let url = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first else {
            return nil
        }
        return url.appendingPathComponent(folderName)
    }

    // Rasm fayli uchun to'liq URL manzilini olish
    private func getURLForImage(imageName: String, folderName: String) -> URL? {
        guard let folderURL = getURLForFolder(folderName: folderName) else {
            return nil
        }
        return folderURL.appendingPathComponent(imageName + ".png")
    }
}

import Foundation
import SwiftUI
import Combine

class CoinImageService {

    @Published var image: UIImage? = nil

    private var imageSubscription: AnyCancellable?
    private let coin: CoinModel

    // LocalFileManager havolasi va kesh papkasi nomi
    private let fileManager = LocalFileManager.instance
    private let folderName = "coin_images"
    private let imageName: String

    init(coin: CoinModel) {
        self.coin = coin
        self.imageName = coin.id // Har bir rasm coin id-si bilan nomlanadi (masalan: "bitcoin.png")
        getCoinImage()
    }

    private func getCoinImage() {
        // Birinchi bo'lib xotirani (keshni) tekshiramiz
        if let savedImage = fileManager.getImage(imageName: imageName, folderName: folderName) {
            self.image = savedImage
        } else {
            // Agar keshda rasm yo'q bo'lsa, internetdan yuklaymiz
            downloadCoinImage()
        }
    }

    private func downloadCoinImage() {
        guard let url = URL(string: coin.image) else { return }

        imageSubscription = NetworkingManager.download(url: url)
            .tryMap({ (data) -> UIImage? in
                return UIImage(data: data)
            })
            .sink(receiveCompletion: NetworkingManager.handleCompletion, receiveValue: { [weak self] (returnedImage) in
                guard let self = self, let downloadedImage = returnedImage else { return }

                // Rasmni view-ga uzatamiz
                self.image = downloadedImage
                self.imageSubscription?.cancel()

                // Yuklangan rasmni kelajak uchun keshga saqlab qo'yamiz
                self.fileManager.saveImage(image: downloadedImage, imageName: self.imageName, folderName: self.folderName)
            })
    }
}