perf: cache danbooru page token floor and reuse search-history payloadsHEADmain

1 files changed, 7 insertions, 3 deletions

diff --git a/Sora/Data/Booru/BooruManager.swift b/Sora/Data/Booru/BooruManager.swift
index 3c4374e..2957fcd 100644
--- a/Sora/Data/Booru/BooruManager.swift
+++ b/Sora/Data/Booru/BooruManager.swift
@@ -30,6 +30,7 @@ class BooruManager: ObservableObject {  // swiftlint:disable:this type_body_leng
   private let showHeldMoebooruPosts: Bool
   private var urlCache: [String: URL] = [:]
   private var lastPostCount = 0
+  private var cachedMinimumPostID: Int?
 
   // MARK: - Computed Properties
   var tags: [String] {
@@ -340,9 +341,7 @@ class BooruManager: ObservableObject {  // swiftlint:disable:this type_body_leng
     guard page > 1 else { return "1" }
     guard !hasExplicitSortTag(in: tags) else { return String(page) }
 
-    guard let minimumPostID = posts.lazy.compactMap({ Int($0.id) }).min() else {
-      return String(page)
-    }
+    guard let minimumPostID = cachedMinimumPostID else { return String(page) }
 
     return "b\(minimumPostID)"
   }
@@ -545,12 +544,17 @@ class BooruManager: ObservableObject {  // swiftlint:disable:this type_body_leng
       postIndexMap.removeAll()
 
       lastPostCount = 0
+      cachedMinimumPostID = nil
     }
 
     endOfData = newPosts.isEmpty
 
     guard !endOfData else { return }
 
+    if let nextMinimumPostID = newPosts.lazy.compactMap({ Int($0.id) }).min() {
+      cachedMinimumPostID = min(cachedMinimumPostID ?? nextMinimumPostID, nextMinimumPostID)
+    }
+
     withTransaction(Transaction(animation: nil)) {
       let oldCount = self.posts.count