feat: Development commit

4 files changed, 73 insertions, 0 deletions

diff --git a/Sora/Data/ImageCacheManager.swift b/Sora/Data/ImageCacheManager.swift
new file mode 100644
index 0000000..cc5cb7e
--- /dev/null
+++ b/Sora/Data/ImageCacheManager.swift
@@ -0,0 +1,36 @@
+import Combine
+import SwiftUI
+
+class ImageCacheManager {
+  static let shared = ImageCacheManager()
+  private let cache: URLCache
+  private var cancellables: Set<AnyCancellable> = []
+
+  init() {
+    cache = URLCache(
+      memoryCapacity: 100 * 1_024 * 1_024,  // 100 MB
+      diskCapacity: 500 * 1_024 * 1_024,  // 500 MB
+      diskPath: "SoraImageCache"
+    )
+
+    URLCache.shared = cache
+  }
+
+  func preloadImages(_ urls: [URL]) {
+    urls.forEach { url in
+      URLSession.shared.dataTaskPublisher(for: url)
+        .sink(
+          receiveCompletion: { _ in () },
+          receiveValue: { data, response in
+            let cachedResponse = CachedURLResponse(
+              response: response,
+              data: data
+            )
+
+            self.cache.storeCachedResponse(cachedResponse, for: URLRequest(url: url))
+          }
+        )
+        .store(in: &cancellables)
+    }
+  }
+}
diff --git a/Sora/Data/Settings/SettingsManager.swift b/Sora/Data/Settings/SettingsManager.swift
index 6035de3..3c4dc77 100644
--- a/Sora/Data/Settings/SettingsManager.swift
+++ b/Sora/Data/Settings/SettingsManager.swift
@@ -41,6 +41,9 @@ class SettingsManager: ObservableObject {
     var saveTagsToFile = false
   #endif
 
+  @AppStorage("preloadedCarouselImages")
+  var preloadedCarouselImages = 3
+
   var bookmarks: [SettingsBookmark] {
     get {
       if let bookmarks = try? JSONDecoder().decode([SettingsBookmark].self, from: bookmarksData) {
@@ -129,6 +132,7 @@ class SettingsManager: ObservableObject {
     displayRatingsData = Self.defaultRatingsData()
     blurRatingsData = Self.initializeRatingsData(enabledRatings: [.explicit])
     displayDetailsInformationBar = true
+    preloadedCarouselImages = 3
 
     #if os(macOS)
       saveTagsToFile = false
diff --git a/Sora/Views/Post/Details/PostDetailsCarouselView.swift b/Sora/Views/Post/Details/PostDetailsCarouselView.swift
index 378b9cc..de14477 100644
--- a/Sora/Views/Post/Details/PostDetailsCarouselView.swift
+++ b/Sora/Views/Post/Details/PostDetailsCarouselView.swift
@@ -7,6 +7,7 @@ struct PostDetailsCarouselView: View {
   let focusedPost: BooruPost?
   @Binding var loadingStage: BooruPostLoadingState
   @State private var currentIndex: Int
+  private let cacheManager = ImageCacheManager.shared
 
   init(
     posts: [BooruPost],
@@ -61,9 +62,29 @@ struct PostDetailsCarouselView: View {
     }
     .onChange(of: currentIndex) {
       if currentIndex == posts.count - 1 { manager.loadNextPage() }
+
+      preloadNearbyImages()
     }
+    .onAppear(perform: preloadNearbyImages)
     #if !os(macOS)
       .tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
     #endif
   }
+
+  private func preloadNearbyImages() {
+    let preloadRange = settings.preloadedCarouselImages
+    let startIndex = max(0, currentIndex - preloadRange)
+    let endIndex = min(posts.count - 1, currentIndex + preloadRange)
+    var urlsToPreload: [URL] = []
+
+    for index in startIndex...endIndex {
+      if let url = imageURL(post: posts[index]) {
+        urlsToPreload.append(url)
+      }
+
+      urlsToPreload.append(posts[index].previewURL)
+    }
+
+    cacheManager.preloadImages(urlsToPreload)
+  }
 }
diff --git a/Sora/Views/Settings/Section/SettingsDetailsView.swift b/Sora/Views/Settings/Section/SettingsDetailsView.swift
index 5abd394..885ef6f 100644
--- a/Sora/Views/Settings/Section/SettingsDetailsView.swift
+++ b/Sora/Views/Settings/Section/SettingsDetailsView.swift
@@ -21,5 +21,17 @@ struct SettingsDetailsView: View {
         Text("Saves post tags in a file alongside the downloaded image.")
       }
     #endif
+
+    #if os(macOS)
+      Picker("Preloaded Images", selection: $settings.preloadedCarouselImages) {
+        ForEach(1...10, id: \.self) { columns in Text("\(columns)") }
+      }
+    #else
+      Stepper(
+        "Preloaded Images: \(settings.preloadedCarouselImages)",
+        value: $settings.preloadedCarouselImages,
+        in: 1...10
+      )
+    #endif
   }
 }