1 files changed, 31 insertions, 1 deletions
diff --git a/Sora/Data/Settings/SettingsManager.swift b/Sora/Data/Settings/SettingsManager.swift
index ffe7057..39eb6bf 100644
--- a/Sora/Data/Settings/SettingsManager.swift
+++ b/Sora/Data/Settings/SettingsManager.swift
@@ -887,10 +887,22 @@ class SettingsManager: ObservableObject {  // swiftlint:disable:this type_body_l
 
   // MARK: Bookmark Management
   func addBookmark(provider: BooruProvider, tags: [String]) {
+    let normalizedTags = tags.map { $0.lowercased() }
+
+    let existingBookmark = bookmarks.first { bookmark in
+      bookmark.provider == provider && Set(bookmark.tags) == Set(normalizedTags)
+    }
+
+    guard existingBookmark == nil else {
+      debugPrint("SettingsManager.addBookmark: Bookmark already exists")
+
+      return
+    }
+
     var updatedBookmarks = bookmarks
 
     updatedBookmarks.append(
-      SettingsBookmark(provider: provider, tags: tags.map { $0.lowercased() })
+      SettingsBookmark(provider: provider, tags: normalizedTags)
     )
 
     if let data = Self.encode(updatedBookmarks), data.count < 1_000_000 {  // 1 MB
@@ -992,6 +1004,16 @@ class SettingsManager: ObservableObject {  // swiftlint:disable:this type_body_l
 
   // MARK: Favourites Management
   func addFavorite(post: BooruPost, provider: BooruProvider, folder: UUID? = nil) {
+    let existingFavorite = favorites.first { favorite in
+      favorite.postId == post.id && favorite.provider == provider
+    }
+
+    guard existingFavorite == nil else {
+      debugPrint("SettingsManager.addFavorite: Favorite already exists")
+
+      return
+    }
+
     var updatedFavorites = favorites
 
     updatedFavorites.append(
@@ -1037,6 +1059,14 @@ class SettingsManager: ObservableObject {  // swiftlint:disable:this type_body_l
     favorites.contains { $0.postId == postId && $0.provider == provider }
   }
 
+  func isBookmark(provider: BooruProvider, tags: [String]) -> Bool {
+    let normalizedTags = tags.map { $0.lowercased() }
+
+    return bookmarks.contains { bookmark in
+      bookmark.provider == provider && Set(bookmark.tags) == Set(normalizedTags)
+    }
+  }
+
   func exportFavorites() throws -> Data {
     try JSONEncoder().encode(favorites)
   }