Enable user mentions in Rich Text Editor

RiotSwiftUI/Modules/Room/Composer/Model/ComposerModels.swift

@@ -229,12 +229,14 @@ enum ComposerViewAction: Equatable {
     case contentDidChange(isEmpty: Bool)
     case linkTapped(linkAction: LinkAction)
     case storeSelection(selection: NSRange)
+    case suggestion(pattern: SuggestionPattern?)
 }
 
 enum ComposerViewModelResult: Equatable {
     case cancel
     case contentDidChange(isEmpty: Bool)
     case linkTapped(LinkAction: LinkAction)
+    case suggestion(pattern: SuggestionPattern?)
 }
 
 final class LinkActionWrapper: NSObject {
@@ -245,3 +247,12 @@ final class LinkActionWrapper: NSObject {
         super.init()
     }
 }
+
+final class SuggestionPatternWrapper: NSObject {
+    let suggestionPattern: SuggestionPattern?
+
+    init(_ suggestionPattern: SuggestionPattern?) {
+        self.suggestionPattern = suggestionPattern
+        super.init()
+    }
+}

RiotSwiftUI/Modules/Room/Composer/View/Composer.swift

@@ -248,6 +248,9 @@ struct Composer: View {
                 wysiwygViewModel.maximised = false
             }
         }
+        .onChange(of: wysiwygViewModel.suggestionPattern) { newValue in
+            sendMentionPattern(pattern: newValue)
+        }
     }
     
     private func storeCurrentSelection() {
@@ -258,6 +261,10 @@ struct Composer: View {
         let linkAction = wysiwygViewModel.getLinkAction()
         viewModel.send(viewAction: .linkTapped(linkAction: linkAction))
     }
+
+    private func sendMentionPattern(pattern: SuggestionPattern?) {
+        viewModel.send(viewAction: .suggestion(pattern: pattern))
+    }
 }
 
 private extension WysiwygComposerViewModel {

RiotSwiftUI/Modules/Room/Composer/ViewModel/ComposerViewModel.swift

@@ -90,6 +90,8 @@ final class ComposerViewModel: ComposerViewModelType, ComposerViewModelProtocol
             callback?(.linkTapped(LinkAction: linkAction))
         case let .storeSelection(selection):
             selectionToRestore = selection
+        case let .suggestion(pattern: pattern):
+            callback?(.suggestion(pattern: pattern))
         }
     }
     

RiotSwiftUI/Modules/Room/UserSuggestion/Coordinator/UserSuggestionCoordinator.swift

@@ -18,6 +18,7 @@ import Combine
 import Foundation
 import SwiftUI
 import UIKit
+import WysiwygComposer
 
 protocol UserSuggestionCoordinatorDelegate: AnyObject {
     func userSuggestionCoordinator(_ coordinator: UserSuggestionCoordinator, didRequestMentionForMember member: MXRoomMember, textTrigger: String?)
@@ -92,6 +93,10 @@ final class UserSuggestionCoordinator: Coordinator, Presentable {
         userSuggestionService.processTextMessage(textMessage)
     }
 
+    func processSuggestionPattern(_ suggestionPattern: SuggestionPattern?) {
+        userSuggestionService.processSuggestionPattern(suggestionPattern)
+    }
+
     // MARK: - Public
 
     func start() { }

RiotSwiftUI/Modules/Room/UserSuggestion/Coordinator/UserSuggestionCoordinatorBridge.swift

@@ -44,6 +44,10 @@ final class UserSuggestionCoordinatorBridge: NSObject {
     func processTextMessage(_ textMessage: String) {
         userSuggestionCoordinator.processTextMessage(textMessage)
     }
+
+    func processSuggestionPattern(_ suggestionPatternWrapper: SuggestionPatternWrapper) {
+        userSuggestionCoordinator.processSuggestionPattern(suggestionPatternWrapper.suggestionPattern)
+    }
     
     func toPresentable() -> UIViewController? {
         userSuggestionCoordinator.toPresentable()

RiotSwiftUI/Modules/Room/UserSuggestion/Service/UserSuggestionService.swift

@@ -16,6 +16,7 @@
 
 import Combine
 import Foundation
+import WysiwygComposer
 
 struct RoomMembersProviderMember {
     var userId: String
@@ -85,6 +86,16 @@ class UserSuggestionService: UserSuggestionServiceProtocol {
         
         currentTextTriggerSubject.send(lastComponent)
     }
+
+    func processSuggestionPattern(_ suggestionPattern: SuggestionPattern?) {
+        guard let suggestionPattern, suggestionPattern.key == .at else {
+            items.send([])
+            currentTextTriggerSubject.send(nil)
+            return
+        }
+
+        currentTextTriggerSubject.send("@" + suggestionPattern.text)
+    }
     
     // MARK: - Private
     

RiotSwiftUI/Modules/Room/UserSuggestion/Service/UserSuggestionServiceProtocol.swift

@@ -16,6 +16,7 @@
 
 import Combine
 import Foundation
+import WysiwygComposer
 
 protocol UserSuggestionItemProtocol: Avatarable {
     var userId: String { get }
@@ -29,6 +30,7 @@ protocol UserSuggestionServiceProtocol {
     var currentTextTrigger: String? { get }
     
     func processTextMessage(_ textMessage: String?)
+    func processSuggestionPattern(_ suggestionPattern: SuggestionPattern?)
 }
 
 // MARK: Avatarable