[PM-28144] Add debouncing to searches (#2176)

AuthenticatorShared/UI/Vault/ItemList/ItemList/ItemListView.swift

@@ -371,7 +371,7 @@ struct ItemListView: View {
                 placement: .navigationBarDrawer(displayMode: .always),
                 prompt: Localizations.search,
             )
-            .task(id: store.state.searchText) {
+            .searchDebouncedTask(id: store.state.searchText) {
                 await store.perform(.search(store.state.searchText))
             }
         }

BitwardenKit/Core/Platform/Utilities/Constants.swift

@@ -24,6 +24,9 @@ public enum Constants {
     /// The minimum number of minutes before attempting a server config sync again.
     public static let minimumConfigSyncInterval: TimeInterval = 60 * 60 // 60 minutes
 
+    /// The search debounce time in nanoseconds.
+    public static let searchDebounceTimeInNS: UInt64 = 200_000_000 // 200ms
+
     /// The default file name when the file name cannot be determined.
     public static let unknownFileName = "unknown_file_name"
 }

BitwardenKit/UI/Platform/Application/Extensions/View+Task.swift

@@ -0,0 +1,59 @@
+import SwiftUI
+
+public extension View {
+    /// Adds a debounced task to perform before this view appears or when a specified
+    /// value changes.
+    /// This means that the task will execute the action when the specified value doesn't change
+    /// in the debounce interval specified.
+    ///
+    /// - Parameters:
+    ///   - id: The value to observe for changes. The value must conform
+    ///     to the <doc://com.apple.documentation/documentation/Swift/Equatable>
+    ///     protocol.
+    ///   - debounceIntervalInNS: The interval to be set for debouncing the task.
+    ///   - action: A closure that SwiftUI calls as an asynchronous task
+    ///     before the view appears. SwiftUI can automatically cancel the task
+    ///     after the view disappears before the action completes. If the
+    ///     `id` value changes, SwiftUI cancels and restarts the task.
+    ///
+    /// - Returns: A view that runs the specified action asynchronously before
+    ///   the view appears, or restarts the task when the `id` value changes.
+    @inlinable nonisolated func debouncedTask<T>(
+        id value: T,
+        debounceIntervalInNS: UInt64,
+        _ action: @escaping @Sendable () async -> Void,
+    ) -> some View where T: Equatable {
+        task(id: value) {
+            try? await Task.sleep(nanoseconds: debounceIntervalInNS)
+            guard !Task.isCancelled else {
+                return
+            }
+            await action()
+        }
+    }
+
+    /// Adds a task to perform before this view appears or when a specified
+    /// value changes to be used on debounced searches.
+    ///
+    /// - Parameters:
+    ///   - id: The value to observe for changes. The value must conform
+    ///     to the <doc://com.apple.documentation/documentation/Swift/Equatable>
+    ///     protocol.
+    ///   - action: A closure that SwiftUI calls as an asynchronous task
+    ///     before the view appears. SwiftUI can automatically cancel the task
+    ///     after the view disappears before the action completes. If the
+    ///     `id` value changes, SwiftUI cancels and restarts the task.
+    ///
+    /// - Returns: A view that runs the specified action asynchronously before
+    ///   the view appears, or restarts the task when the `id` value changes.
+    @inlinable nonisolated func searchDebouncedTask<T>(
+        id value: T,
+        _ action: @escaping @Sendable () async -> Void,
+    ) -> some View where T: Equatable {
+        debouncedTask(
+            id: value,
+            debounceIntervalInNS: Constants.searchDebounceTimeInNS,
+            action
+        )
+    }
+}

BitwardenShared/UI/Tools/Send/Send/SendList/SendListView.swift

@@ -266,7 +266,7 @@ struct SendListView: View {
             )
             .task { await store.perform(.loadData) }
             .task { await store.perform(.streamSendList) }
-            .task(id: store.state.searchText) {
+            .searchDebouncedTask(id: store.state.searchText) {
                 await store.perform(.search(store.state.searchText))
             }
             .onChange(of: store.state.infoUrl) { newValue in

BitwardenShared/UI/Vault/Vault/AutofillList/VaultAutofillListView.swift

@@ -106,7 +106,7 @@ private struct VaultAutofillListSearchableView: View {
             .task {
                 await store.perform(.streamShowWebIcons)
             }
-            .task(id: store.state.searchText) {
+            .searchDebouncedTask(id: store.state.searchText) {
                 await store.perform(.search(store.state.searchText))
             }
             .task(id: store.state.excludedCredentialIdFound) {

BitwardenShared/UI/Vault/Vault/VaultGroup/VaultGroupView.swift

@@ -62,7 +62,7 @@ struct VaultGroupView: View {
                 openURL(url)
                 store.send(.clearURL)
             }
-            .task(id: store.state.searchText) {
+            .searchDebouncedTask(id: store.state.searchText) {
                 await store.perform(.search(store.state.searchText))
             }
             .task(id: store.state.searchVaultFilterType) {

BitwardenShared/UI/Vault/Vault/VaultItemSelection/VaultItemSelectionView.swift

@@ -133,7 +133,7 @@ private struct VaultItemSelectionSearchableView: View {
         .task {
             await store.perform(.streamVaultItems)
         }
-        .task(id: store.state.searchText) {
+        .searchDebouncedTask(id: store.state.searchText) {
             await store.perform(.search(store.state.searchText))
         }
         .toast(

BitwardenShared/UI/Vault/Vault/VaultList/VaultListView.swift

@@ -334,7 +334,7 @@ struct VaultListView: View {
                 prompt: Localizations.search,
             )
             .autocorrectionDisabled(true)
-            .task(id: store.state.searchText) {
+            .searchDebouncedTask(id: store.state.searchText) {
                 await store.perform(.search(store.state.searchText))
             }
             .task(id: store.state.searchVaultFilterType) {