Improve user search using the GET profile (#754)

* Add getProfile in ClientProxyProtocol

* Add fetchProfileIfNeeded

* Refactor search

* Update StartChatSuggestedUserCell UI

* Add showProfilePopover action

* Remove popover code

* Add UTs in StartChatViewModelTests

* Add UI tests

* Cleanup code

* Refine design

* Fix design

* Localise StartChatSuggestedUserCell

* Update localisations

* Update StartChatSuggestedUserCell design

* Fix UT

* Fix PR comments

* Apply suggestions

* Fix typo

ElementX/Resources/Localizations/de.lproj/Localizable.strings

@@ -37,7 +37,8 @@
 "action_save" = "Save";
 "action_search" = "Search";
 "action_send" = "Send";
-"action_share_link" = "Share";
+"action_share" = "Share";
+"action_share_link" = "Share link";
 "action_skip" = "Skip";
 "action_start" = "Start";
 "action_start_chat" = "Start chat";
@@ -214,6 +215,7 @@
 "screen_signout_in_progress_dialog_content" = "Signing out…";
 "screen_signout_preference_item" = "Sign out";
 "screen_start_chat_error_starting_chat" = "An error occurred when trying to start a chat";
+"screen_start_chat_unknown_profile" = "We can’t validate this user’s Matrix ID. The invite might not be received.";
 "session_verification_banner_message" = "Looks like you’re using a new device. Verify it’s you to access your encrypted messages.";
 "session_verification_banner_title" = "Access your message history";
 "settings_rageshake" = "Rageshake";

ElementX/Resources/Localizations/en.lproj/Localizable.strings

@@ -37,7 +37,8 @@
 "action_save" = "Save";
 "action_search" = "Search";
 "action_send" = "Send";
-"action_share_link" = "Share";
+"action_share" = "Share";
+"action_share_link" = "Share link";
 "action_skip" = "Skip";
 "action_start" = "Start";
 "action_start_chat" = "Start chat";
@@ -214,6 +215,7 @@
 "screen_signout_in_progress_dialog_content" = "Signing out…";
 "screen_signout_preference_item" = "Sign out";
 "screen_start_chat_error_starting_chat" = "An error occurred when trying to start a chat";
+"screen_start_chat_unknown_profile" = "We can’t validate this user’s Matrix ID. The invite might not be received.";
 "session_verification_banner_message" = "Looks like you’re using a new device. Verify it’s you to access your encrypted messages.";
 "session_verification_banner_title" = "Access your message history";
 "settings_rageshake" = "Rageshake";

ElementX/Resources/Localizations/fr.lproj/Localizable.strings

@@ -37,7 +37,8 @@
 "action_save" = "Save";
 "action_search" = "Search";
 "action_send" = "Send";
-"action_share_link" = "Share";
+"action_share" = "Share";
+"action_share_link" = "Share link";
 "action_skip" = "Skip";
 "action_start" = "Start";
 "action_start_chat" = "Start chat";
@@ -214,6 +215,7 @@
 "screen_signout_in_progress_dialog_content" = "Signing out…";
 "screen_signout_preference_item" = "Sign out";
 "screen_start_chat_error_starting_chat" = "An error occurred when trying to start a chat";
+"screen_start_chat_unknown_profile" = "We can’t validate this user’s Matrix ID. The invite might not be received.";
 "session_verification_banner_message" = "Looks like you’re using a new device. Verify it’s you to access your encrypted messages.";
 "session_verification_banner_title" = "Access your message history";
 "settings_rageshake" = "Rageshake";

ElementX/Resources/Localizations/it.lproj/Localizable.strings

@@ -37,7 +37,8 @@
 "action_save" = "Save";
 "action_search" = "Search";
 "action_send" = "Send";
-"action_share_link" = "Share";
+"action_share" = "Share";
+"action_share_link" = "Share link";
 "action_skip" = "Skip";
 "action_start" = "Start";
 "action_start_chat" = "Start chat";
@@ -214,6 +215,7 @@
 "screen_signout_in_progress_dialog_content" = "Signing out…";
 "screen_signout_preference_item" = "Sign out";
 "screen_start_chat_error_starting_chat" = "An error occurred when trying to start a chat";
+"screen_start_chat_unknown_profile" = "We can’t validate this user’s Matrix ID. The invite might not be received.";
 "session_verification_banner_message" = "Looks like you’re using a new device. Verify it’s you to access your encrypted messages.";
 "session_verification_banner_title" = "Access your message history";
 "settings_rageshake" = "Rageshake";

ElementX/Resources/Localizations/ro.lproj/Localizable.strings

@@ -37,6 +37,7 @@
 "action_save" = "Salvează";
 "action_search" = "Caută";
 "action_send" = "Trimite";
+"action_share" = "Share";
 "action_share_link" = "Partajează linkul";
 "action_skip" = "Omite";
 "action_start" = "Începe";
@@ -214,6 +215,7 @@
 "screen_signout_in_progress_dialog_content" = "Deconectare în curs...";
 "screen_signout_preference_item" = "Deconectează-te";
 "screen_start_chat_error_starting_chat" = "A apărut o eroare la încercarea începerii conversației";
+"screen_start_chat_unknown_profile" = "We can’t validate this user’s Matrix ID. The invite might not be received.";
 "session_verification_banner_message" = "Se pare că folosești un dispozitiv nou. Verifică-ți identitatea pentru acces la mesajele tale criptate.";
 "session_verification_banner_title" = "Accesează istoricul mesajelor";
 "settings_rageshake" = "Rageshake";

ElementX/Sources/Generated/Strings.swift

@@ -89,6 +89,8 @@ public enum L10n {
   /// Send
   public static var actionSend: String { return L10n.tr("Localizable", "action_send") }
   /// Share
+  public static var actionShare: String { return L10n.tr("Localizable", "action_share") }
+  /// Share link
   public static var actionShareLink: String { return L10n.tr("Localizable", "action_share_link") }
   /// Skip
   public static var actionSkip: String { return L10n.tr("Localizable", "action_skip") }
@@ -472,6 +474,8 @@ public enum L10n {
   public static var screenSignoutPreferenceItem: String { return L10n.tr("Localizable", "screen_signout_preference_item") }
   /// An error occurred when trying to start a chat
   public static var screenStartChatErrorStartingChat: String { return L10n.tr("Localizable", "screen_start_chat_error_starting_chat") }
+  /// We can’t validate this user’s Matrix ID. The invite might not be received.
+  public static var screenStartChatUnknownProfile: String { return L10n.tr("Localizable", "screen_start_chat_unknown_profile") }
   /// Looks like you’re using a new device. Verify it’s you to access your encrypted messages.
   public static var sessionVerificationBannerMessage: String { return L10n.tr("Localizable", "session_verification_banner_message") }
   /// Access your message history

ElementX/Sources/Screens/StartChat/StartChatViewModel.swift

@@ -24,9 +24,6 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
     
     var callback: ((StartChatViewModelAction) -> Void)?
     weak var userIndicatorController: UserIndicatorControllerProtocol?
-    var searchTask: Task<Void, Error>? {
-        didSet { oldValue?.cancel() }
-    }
     
     init(userSession: UserSessionProtocol, userIndicatorController: UserIndicatorControllerProtocol?) {
         self.userSession = userSession
@@ -50,7 +47,7 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
         case .selectUser(let user):
             showLoadingIndicator()
             Task {
-                let currentDirectRoom = await userSession.clientProxy.directRoomForUserID(user.userID)
+                let currentDirectRoom = await clientProxy.directRoomForUserID(user.userID)
                 switch currentDirectRoom {
                 case .success(.some(let roomId)):
                     self.hideLoadingIndicator()
@@ -65,7 +62,9 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
         }
     }
     
-    func displayError(_ type: ClientProxyError) {
+    // MARK: - Private
+    
+    private func displayError(_ type: ClientProxyError) {
         switch type {
         case .failedRetrievingDirectRoom:
             state.bindings.alertInfo = AlertInfo(id: type,
@@ -80,8 +79,6 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
         }
     }
     
-    // MARK: - Private
-    
     private func setupBindings() {
         context.$viewState
             .map(\.bindings.searchQuery)
@@ -92,22 +89,56 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
             }
             .switchToLatest()
             .removeDuplicates()
-            .sink { [weak self] query in
-                self?.updateState(searchQuery: query)
+            .sink { [weak self] _ in
+                self?.fetchData()
             }
             .store(in: &cancellables)
     }
     
-    private func updateState(searchQuery: String) {
-        searchTask = nil
-        
-        if searchQuery.count < 3 {
+    private func fetchData() {
+        guard searchQuery.count >= 3 else {
             fetchSuggestions()
-        } else if MatrixEntityRegex.isMatrixUserIdentifier(searchQuery) {
-            state.usersSection = .init(type: .searchResult, users: [UserProfile(userID: searchQuery)])
-        } else {
-            searchUsers(searchTerm: searchQuery)
+            return
         }
+        
+        Task {
+            await searchProfiles()
+        }
+    }
+    
+    private func searchProfiles() async {
+        // copies the current query to check later if fetched data must be shown or not
+        let committedQuery = searchQuery
+        
+        async let queriedProfile = getProfileIfPossible()
+        async let searchedUsers = clientProxy.searchUsers(searchTerm: committedQuery, limit: 5)
+        
+        await updateState(committedQuery: committedQuery,
+                          queriedProfile: queriedProfile,
+                          searchResults: try? searchedUsers.get())
+    }
+    
+    private func updateState(committedQuery: String, queriedProfile: UserProfile?, searchResults: SearchUsersResults?) {
+        guard committedQuery == searchQuery else {
+            return
+        }
+        
+        let localProfile = queriedProfile ?? UserProfile(searchQuery: searchQuery)
+        let allResults = merge(localProfile: localProfile, searchResults: searchResults?.results)
+        
+        state.usersSection = .init(type: .searchResult, users: allResults)
+    }
+    
+    private func merge(localProfile: UserProfile?, searchResults: [UserProfile]?) -> [UserProfile] {
+        guard let localProfile else {
+            return searchResults ?? []
+        }
+        
+        let filteredSearchResult = searchResults?.filter {
+            $0.userID != localProfile.userID
+        } ?? []
+
+        return [localProfile] + filteredSearchResult
     }
     
     private func fetchSuggestions() {
@@ -116,7 +147,7 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
     
     private func createDirectRoom(with user: UserProfile) async {
         showLoadingIndicator()
-        let result = await userSession.clientProxy.createDirectRoom(with: user.userID)
+        let result = await clientProxy.createDirectRoom(with: user.userID)
         hideLoadingIndicator()
         switch result {
         case .success(let roomId):
@@ -126,17 +157,20 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
         }
     }
     
-    private func searchUsers(searchTerm: String) {
-        searchTask = Task { @MainActor in
-            guard
-                case let .success(result) = await userSession.clientProxy.searchUsers(searchTerm: searchTerm, limit: 5),
-                !Task.isCancelled
-            else {
-                return
-            }
-            
-            state.usersSection = .init(type: .searchResult, users: result.results)
+    private func getProfileIfPossible() async -> UserProfile? {
+        guard searchQuery.isMatrixIdentifier else {
+            return nil
         }
+        
+        return try? await clientProxy.getProfile(for: searchQuery).get()
+    }
+    
+    private var clientProxy: ClientProxyProtocol {
+        userSession.clientProxy
+    }
+    
+    private var searchQuery: String {
+        context.searchQuery
     }
     
     // MARK: Loading indicator
@@ -154,3 +188,18 @@ class StartChatViewModel: StartChatViewModelType, StartChatViewModelProtocol {
         userIndicatorController?.retractIndicatorWithId(Self.loadingIndicatorIdentifier)
     }
 }
+
+private extension String {
+    var isMatrixIdentifier: Bool {
+        MatrixEntityRegex.isMatrixUserIdentifier(self)
+    }
+}
+
+private extension UserProfile {
+    init?(searchQuery: String) {
+        guard searchQuery.isMatrixIdentifier else {
+            return nil
+        }
+        self.init(userID: searchQuery)
+    }
+}

ElementX/Sources/Screens/StartChat/StartChatViewModelProtocol.swift

@@ -20,8 +20,4 @@ import Foundation
 protocol StartChatViewModelProtocol {
     var callback: ((StartChatViewModelAction) -> Void)? { get set }
     var context: StartChatViewModelType.Context { get }
-    
-    /// Display an error to the user.
-    /// - Parameter type: The type of error to be displayed.
-    func displayError(_ type: ClientProxyError)
 }

ElementX/Sources/Screens/StartChat/View/StartChatSuggestedUserCell.swift

@@ -29,15 +29,29 @@ struct StartChatSuggestedUserCell: View {
                                 imageProvider: imageProvider)
                 .padding(.vertical, 10)
                 .accessibilityHidden(true)
+            
             VStack(alignment: .leading, spacing: 4) {
                 Text(user.displayName ?? user.userID)
                     .font(.element.title3)
                     .foregroundColor(.element.primaryContent)
+                
                 if user.displayName != nil {
                     Text(user.userID)
                         .font(.element.subheadline)
                         .foregroundColor(.element.tertiaryContent)
                 }
+                
+                if !user.isVerified {
+                    HStack(alignment: .firstTextBaseline, spacing: 4) {
+                        Text(Image(systemName: "exclamationmark.circle.fill"))
+                            .foregroundColor(.compound.textActionCritical)
+                        
+                        Text(L10n.screenStartChatUnknownProfile)
+                            .foregroundColor(.secondary)
+                    }
+                    .font(.compound.bodyXS)
+                    .padding(.top, 4)
+                }
             }
             .accessibilityElement(children: .combine)
         }

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -258,6 +258,16 @@ class ClientProxy: ClientProxyProtocol {
         }
     }
     
+    func getProfile(for userID: String) async -> Result<UserProfile, ClientProxyError> {
+        await Task.dispatch(on: clientQueue) {
+            do {
+                return try .success(.init(sdkUserProfile: self.client.getProfile(userId: userID)))
+            } catch {
+                return .failure(.failedGettingUserProfile)
+            }
+        }
+    }
+    
     // MARK: Private
 
     private func loadUserAvatarURLFromCache() {

ElementX/Sources/Services/Client/ClientProxyProtocol.swift

@@ -32,6 +32,7 @@ enum ClientProxyError: Error {
     case failedRetrievingSessionVerificationController
     case failedLoadingMedia
     case failedSearchingUsers
+    case failedGettingUserProfile
 }
 
 enum SlidingSyncConstants {
@@ -94,4 +95,6 @@ protocol ClientProxyProtocol: AnyObject, MediaLoaderProtocol {
     func setPusher(with configuration: PusherConfiguration) async throws
     
     func searchUsers(searchTerm: String, limit: UInt) async -> Result<SearchUsersResults, ClientProxyError>
+    
+    func getProfile(for userID: String) async -> Result<UserProfile, ClientProxyError>
 }

ElementX/Sources/Services/Client/MockClientProxy.swift

@@ -115,4 +115,11 @@ class MockClientProxy: ClientProxyProtocol {
     func searchUsers(searchTerm: String, limit: UInt) async -> Result<SearchUsersResults, ClientProxyError> {
         searchUsersResult
     }
+    
+    var getProfileResult: Result<UserProfile, ClientProxyError> = .success(.init(userID: "@a:b.com", displayName: "Some user"))
+    private(set) var getProfileCalled = false
+    func getProfile(for userID: String) async -> Result<UserProfile, ClientProxyError> {
+        getProfileCalled = true
+        return getProfileResult
+    }
 }

ElementX/Sources/Services/Users/UserProfile.swift

@@ -33,6 +33,12 @@ struct UserProfile {
         displayName = sdkUserProfile.displayName
         avatarURL = sdkUserProfile.avatarUrl.flatMap(URL.init(string:))
     }
+    
+    /// A user is meant to be "verified" when the GET profile returns back either the display name or the avatar
+    /// If isn't we aren't sure that the related matrix id really exists.
+    var isVerified: Bool {
+        displayName != nil || avatarURL != nil
+    }
 }
 
 struct SearchUsersResults {

ElementX/Sources/UITests/UITestsAppCoordinator.swift

@@ -322,6 +322,14 @@ class MockScreen: Identifiable {
             let coordinator = StartChatCoordinator(parameters: .init(userSession: MockUserSession(clientProxy: clientProxy, mediaProvider: MockMediaProvider())))
             navigationStackCoordinator.setRootCoordinator(coordinator)
             return navigationStackCoordinator
+        case .startChatSearchingNonExistingID:
+            let navigationStackCoordinator = NavigationStackCoordinator()
+            let clientProxy = MockClientProxy(userID: "@mock:client.com")
+            clientProxy.searchUsersResult = .success(.init(results: [.mockAlice], limited: true))
+            clientProxy.getProfileResult = .failure(.failedGettingUserProfile)
+            let coordinator = StartChatCoordinator(parameters: .init(userSession: MockUserSession(clientProxy: clientProxy, mediaProvider: MockMediaProvider())))
+            navigationStackCoordinator.setRootCoordinator(coordinator)
+            return navigationStackCoordinator
         case .roomMemberDetailsAccountOwner:
             let navigationStackCoordinator = NavigationStackCoordinator()
             let coordinator = RoomMemberDetailsCoordinator(parameters: .init(roomMemberProxy: RoomMemberProxyMock.mockMe, mediaProvider: MockMediaProvider()))

ElementX/Sources/UITests/UITestsScreenIdentifier.swift

@@ -50,6 +50,7 @@ enum UITestsScreenIdentifier: String {
     case reportContent
     case startChat
     case startChatWithSearchResults
+    case startChatSearchingNonExistingID
 }
 
 extension UITestsScreenIdentifier: CustomStringConvertible {