add cache photo

yobble/Services/KeychainService.swift

@@ -1,5 +1,8 @@
 import Foundation
+import SwiftUICore
 import Security
+import UIKit
+import Combine
 
 
 //let username = "user1"
@@ -111,3 +114,117 @@ class KeychainService {
         }
     }
 }
+
+class AvatarCacheService {
+    static let shared = AvatarCacheService()
+    private let fileManager = FileManager.default
+    private var baseCacheDirectory: URL? {
+        fileManager.urls(for: .cachesDirectory, in: .userDomainMask).first?.appendingPathComponent("avatar_cache")
+    }
+
+    private init() {}
+
+    private func cacheDirectory(for userId: String) -> URL? {
+        baseCacheDirectory?.appendingPathComponent(userId)
+    }
+
+    private func filePath(forKey key: String, userId: String) -> URL? {
+        cacheDirectory(for: userId)?.appendingPathComponent(key)
+    }
+
+    func getImage(forKey key: String, userId: String) -> UIImage? {
+        guard let url = filePath(forKey: key, userId: userId),
+              fileManager.fileExists(atPath: url.path),
+              let data = try? Data(contentsOf: url) else {
+            return nil
+        }
+        return UIImage(data: data)
+    }
+
+    func saveImage(_ image: UIImage, forKey key: String, userId: String) {
+        guard let directory = cacheDirectory(for: userId),
+              let url = filePath(forKey: key, userId: userId),
+              let data = image.jpegData(compressionQuality: 0.8) else {
+            return
+        }
+
+        if !fileManager.fileExists(atPath: directory.path) {
+            try? fileManager.createDirectory(at: directory, withIntermediateDirectories: true, attributes: nil)
+        }
+
+        try? data.write(to: url)
+    }
+
+    func clearCache(forUserId userId: String) {
+        guard let directory = cacheDirectory(for: userId) else { return }
+        try? fileManager.removeItem(at: directory)
+    }
+
+    func clearAllCache() {
+        guard let directory = baseCacheDirectory else { return }
+        try? fileManager.removeItem(at: directory)
+    }
+}
+
+class ImageLoader: ObservableObject {
+    @Published var image: UIImage?
+    
+    private let url: URL
+    private let fileId: String
+    private let userId: String
+    private var cancellable: AnyCancellable?
+    private let cache = AvatarCacheService.shared
+
+    init(url: URL, fileId: String, userId: String) {
+        self.url = url
+        self.fileId = fileId
+        self.userId = userId
+    }
+
+    deinit {
+        cancellable?.cancel()
+    }
+
+    func load() {
+        if let cachedImage = cache.getImage(forKey: fileId, userId: userId) {
+            self.image = cachedImage
+            return
+        }
+
+        cancellable = URLSession.shared.dataTaskPublisher(for: url)
+            .map { UIImage(data: $0.data) }
+            .replaceError(with: nil)
+            .receive(on: DispatchQueue.main)
+            .sink { [weak self] loadedImage in
+                guard let self = self, let image = loadedImage else { return }
+                self.image = image
+                self.cache.saveImage(image, forKey: self.fileId, userId: self.userId)
+            }
+    }
+}
+
+struct CachedAvatarView<Placeholder: View>: View {
+    @StateObject private var loader: ImageLoader
+    private let placeholder: Placeholder
+
+    init(url: URL, fileId: String, userId: String, @ViewBuilder placeholder: () -> Placeholder) {
+        self.placeholder = placeholder()
+        _loader = StateObject(wrappedValue: ImageLoader(url: url, fileId: fileId, userId: userId))
+    }
+
+    var body: some View {
+        content
+            .onAppear(perform: loader.load)
+    }
+
+    private var content: some View {
+        Group {
+            if let image = loader.image {
+                Image(uiImage: image)
+                    .resizable()
+            } else {
+                placeholder
+            }
+        }
+    }
+}

yobble/Views/Tab/ChatsTab.swift

@@ -1035,28 +1035,13 @@ private struct ChatRowView: View {
 
     var body: some View {
         HStack(spacing: 12) {
-            if #available(iOS 15.0, *) {
-                if let url = avatarUrl {
-                    AsyncImage(url: url) { phase in
-                        switch phase {
-                        case .empty:
+            if let url = avatarUrl, let fileId = chat.chatData?.avatars?.current?.fileId, let loggedInUserId = currentUserId {
+                CachedAvatarView(url: url, fileId: fileId, userId: loggedInUserId) {
                     placeholderAvatar
-                        case .success(let image):
-                            image
-                                .resizable()
+                }
                 .aspectRatio(contentMode: .fill)
                 .frame(width: avatarSize, height: avatarSize)
                 .clipShape(Circle())
-                        case .failure:
-                            placeholderAvatar
-                        @unknown default:
-                            placeholderAvatar
-                        }
-                    }
-                    .frame(width: avatarSize, height: avatarSize)
-                } else {
-                    placeholderAvatar
-                }
             } else {
                 placeholderAvatar
             }