Space flow improvements. (#4430)

* Space flow improvements

- Use a state machine to select a space.
- Add a SpaceFlowCoordinator for recursively presenting subspaces.
- Get the spaceRoomListProxy when tapping on the space so we can indicate failures.
- Fix the total room count in SpaceListScreen.

* Refactor spaceRoom → spaceRoomProxy.

* Add a UI test for the Spaces flow.

ElementX/Sources/Mocks/ClientProxyMock.swift

@@ -85,6 +85,8 @@ extension ClientProxyMock {
         secureBackupController = SecureBackupControllerMock(.init(recoveryState: configuration.recoveryState))
         resetIdentityReturnValue = .success(IdentityResetHandleSDKMock(.init()))
         
+        spaceService = SpaceServiceProxyMock(.init())
+        
         roomForIdentifierClosure = { [weak self] identifier in
             guard let room = self?.roomSummaryProvider.roomListPublisher.value.first(where: { $0.id == identifier }) else {
                 return nil

ElementX/Sources/Mocks/Generated/GeneratedMocks.swift

@@ -2156,6 +2156,11 @@ class ClientProxyMock: ClientProxyProtocol, @unchecked Sendable {
     }
     var underlyingSecureBackupController: SecureBackupControllerProtocol!
     var sessionVerificationController: SessionVerificationControllerProxyProtocol?
+    var spaceService: SpaceServiceProxyProtocol {
+        get { return underlyingSpaceService }
+        set(value) { underlyingSpaceService = value }
+    }
+    var underlyingSpaceService: SpaceServiceProxyProtocol!
     var isReportRoomSupportedCallsCount = 0
     var isReportRoomSupportedCalled: Bool {
         return isReportRoomSupportedCallsCount > 0

ElementX/Sources/Mocks/SpaceRoomProxyMock.swift

@@ -99,6 +99,14 @@ extension [SpaceRoomProxyProtocol] {
         makeSpaceRooms(isSpace: true) + makeSpaceRooms(isSpace: false)
     }
     
+    static var mockSingleRoom: [SpaceRoomProxyProtocol] {
+        [SpaceRoomProxyMock(.init(id: "!spaceroom:matrix.org",
+                                  name: "Management",
+                                  isSpace: false,
+                                  joinedMembersCount: 12,
+                                  topic: "This is where everything gets organised 📋."))]
+    }
+    
     private static func makeSpaceRooms(isSpace: Bool) -> [SpaceRoomProxyMock] {
         let typeName = isSpace ? "Space" : "Room"
         

ElementX/Sources/Mocks/SpaceServiceProxyMock.swift

@@ -5,6 +5,7 @@
 // Please see LICENSE files in the repository root for full details.
 //
 
+import Combine
 import Foundation
 import MatrixRustSDK
 
@@ -27,3 +28,16 @@ extension SpaceServiceProxyMock {
         }
     }
 }
+
+extension SpaceServiceProxyMock.Configuration {
+    static var populated: SpaceServiceProxyMock.Configuration {
+        let spaceRoomLists = [SpaceRoomProxyProtocol].mockJoinedSpaces.map {
+            ($0.id, SpaceRoomListProxyMock(.init(spaceRoomProxy: $0, initialSpaceRooms: .mockSpaceList)))
+        }
+        let subSpaceRoomLists = [SpaceRoomProxyProtocol].mockSpaceList.map {
+            ($0.id, SpaceRoomListProxyMock(.init(spaceRoomProxy: $0, initialSpaceRooms: .mockSingleRoom)))
+        }
+        
+        return .init(joinedSpaces: .mockJoinedSpaces, spaceRoomLists: .init(uniqueKeysWithValues: spaceRoomLists + subSpaceRoomLists))
+    }
+}