Improve search

ViewModels/Sources/ViewModels/View Models/CollectionItemsViewModel.swift

@@ -24,6 +24,7 @@ public class CollectionItemsViewModel: ObservableObject {
     private var localLastReadId: CollectionItem.Id?
     private var markerLastReadId: CollectionItem.Id?
     private var cancellables = Set<AnyCancellable>()
+    private var requestCancellables = Set<AnyCancellable>()
 
     // swiftlint:disable:next function_body_length
     public init(collectionService: CollectionService, identityContext: IdentityContext) {
@@ -247,13 +248,19 @@ extension CollectionItemsViewModel: CollectionViewModel {
                 receiveSubscription: { [weak self] _ in self?.loadingSubject.send(true) },
                 receiveCompletion: { [weak self] _ in self?.loadingSubject.send(false) })
             .sink { _ in }
-            .store(in: &cancellables)
+            .store(in: &requestCancellables)
         collectionService.requestMarkerLastReadId()
             .sink { _ in } receiveValue: { [weak self] in self?.markerLastReadId = $0 }
             .store(in: &cancellables)
 
     }
 
+    public func cancelRequests() {
+        for cancellable in requestCancellables {
+            cancellable.cancel()
+        }
+    }
+
     public func select(indexPath: IndexPath) {
         let item = lastUpdate.sections[indexPath.section].items[indexPath.item]
 

ViewModels/Sources/ViewModels/View Models/CollectionViewModel.swift

@@ -18,6 +18,7 @@ public protocol CollectionViewModel {
     var announcesNewItems: Bool { get }
     func request(maxId: String?, minId: String?, search: Search?)
     func requestNextPage(fromIndexPath indexPath: IndexPath)
+    func cancelRequests()
     func viewedAtTop(indexPath: IndexPath)
     func select(indexPath: IndexPath)
     func canSelect(indexPath: IndexPath) -> Bool

ViewModels/Sources/ViewModels/View Models/ProfileViewModel.swift

@@ -158,6 +158,10 @@ extension ProfileViewModel: CollectionViewModel {
         collectionViewModel.value.request(maxId: maxId, minId: minId, search: nil)
     }
 
+    public func cancelRequests() {
+        collectionViewModel.value.cancelRequests()
+    }
+
     public func requestNextPage(fromIndexPath indexPath: IndexPath) {
         collectionViewModel.value.requestNextPage(fromIndexPath: indexPath)
     }

ViewModels/Sources/ViewModels/View Models/SearchViewModel.swift

@@ -21,6 +21,7 @@ public final class SearchViewModel: CollectionItemsViewModel {
             .removeDuplicates()
             .combineLatest($scope.removeDuplicates())
             .sink { [weak self] in
+                self?.cancelRequests()
                 self?.request(
                     maxId: nil,
                     minId: nil,