From ffa1c05f14400889905a450477a71443c5fe1741 Mon Sep 17 00:00:00 2001
From: Fuwn <contact@fuwn.me>
Date: Sat, 1 Mar 2025 04:37:10 -0800
Subject: feat: Development commit

---
 .../Post/Details/PostDetailsCarouselView.swift      | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'Sora/Views/Post/Details/PostDetailsCarouselView.swift')

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)
+  }
 }
-- 
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