Hook up the RoomThreadList to the RoomFlowCoordinator state machine and presenting threads.

ElementX/Sources/Screens/RoomThreadListScreen/RoomThreadListScreenCoordinator.swift

@@ -13,7 +13,9 @@ struct RoomThreadListScreenCoordinatorParameters {
     let mediaProvider: MediaProviderProtocol
 }
 
-enum RoomThreadListScreenCoordinatorAction { }
+enum RoomThreadListScreenCoordinatorAction {
+    case presentThread(threadRootEventID: String)
+}
 
 final class RoomThreadListScreenCoordinator: CoordinatorProtocol {
     private let parameters: RoomThreadListScreenCoordinatorParameters
@@ -35,7 +37,13 @@ final class RoomThreadListScreenCoordinator: CoordinatorProtocol {
     
     func start() {
         viewModel.actionsPublisher.sink { [weak self] action in
+            guard let self else { return }
             MXLog.info("Coordinator: received view model action: \(action)")
+
+            switch action {
+            case .presentThread(let threadRootEventID):
+                actionsSubject.send(.presentThread(threadRootEventID: threadRootEventID))
+            }
         }
         .store(in: &cancellables)
     }

ElementX/Sources/Screens/RoomThreadListScreen/RoomThreadListScreenModels.swift

@@ -7,7 +7,9 @@
 
 import Foundation
 
-enum RoomThreadListScreenViewModelAction { }
+enum RoomThreadListScreenViewModelAction {
+    case presentThread(threadRootEventID: String)
+}
 
 struct RoomThreadListScreenViewState: BindableState {
     var items = [RoomThreadListItem]()
@@ -22,4 +24,5 @@ struct RoomThreadListScreenViewStateBindings { }
 enum RoomThreadListScreenViewAction {
     case oldestItemDidAppear
     case oldestItemDidDisappear
+    case tappedThread(threadRootEventID: String)
 }

ElementX/Sources/Screens/RoomThreadListScreen/RoomThreadListScreenViewModel.swift

@@ -58,6 +58,8 @@ class RoomThreadListScreenViewModel: RoomThreadListScreenViewModelType, RoomThre
             }
         case .oldestItemDidDisappear:
             isOldestItemVisible = false
+        case .tappedThread(let threadRootEventID):
+            actionsSubject.send(.presentThread(threadRootEventID: threadRootEventID))
         }
     }
     

ElementX/Sources/Screens/RoomThreadListScreen/View/RoomThreadListScreen.swift

@@ -15,9 +15,14 @@ struct RoomThreadListScreen: View {
         ScrollView {
             LazyVStack(spacing: 0) {
                 ForEach(context.viewState.items) { item in
-                    RoomThreadListCell(item: item, mediaProvider: context.mediaProvider)
-                        .padding(.horizontal, 16)
-                        .padding(.vertical, 8)
+                    Button {
+                        context.send(viewAction: .tappedThread(threadRootEventID: item.id))
+                    } label: {
+                        RoomThreadListCell(item: item, mediaProvider: context.mediaProvider)
+                            .padding(.horizontal, 16)
+                            .padding(.vertical, 8)
+                    }
+                    .buttonStyle(ThreadCellButtonStyle())
                 }
                 
                 footer
@@ -137,6 +142,14 @@ private struct RoomThreadListCell: View {
     }
 }
 
+private struct ThreadCellButtonStyle: ButtonStyle {
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .background(configuration.isPressed ? Color.compound.bgSubtleSecondary : Color.compound.bgCanvasDefault)
+            .contentShape(Rectangle())
+    }
+}
+
 // MARK: - Previews
 
 struct RoomThreadListScreen_Previews: PreviewProvider, TestablePreview {