Add SpaceRoomCell & Space…ProxyProtocols and use them on the SpaceListScreen. (#4404)

ElementX/Sources/Services/Spaces/SpaceRoomListProxyProtocol.swift

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+//
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Combine
+import MatrixRustSDK
+
+// Temporary until the SDK is updated.
+enum SpaceRoomListProxyPaginationState {
+    case idle(endReached: Bool)
+    case loading
+}
+
+// sourcery: AutoMockable
+protocol SpaceRoomListProxyProtocol {
+    var spaceRoom: SpaceRoomProxyProtocol { get }
+    
+    var spaceRoomsPublisher: CurrentValuePublisher<[SpaceRoomProxyProtocol], Never> { get }
+    var paginationStatePublisher: CurrentValuePublisher<SpaceRoomListProxyPaginationState, Never> { get }
+    
+    func paginate() async
+}

ElementX/Sources/Services/Spaces/SpaceRoomProxyProtocol.swift

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+//
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Foundation
+import MatrixRustSDK
+
+// sourcery: AutoMockable
+protocol SpaceRoomProxyProtocol {
+    var id: String { get }
+    var name: String? { get }
+    var avatarURL: URL? { get }
+    
+    var isSpace: Bool { get }
+    var childrenCount: Int { get }
+    
+    var joinedMembersCount: Int { get }
+    var heroes: [UserProfileProxy] { get }
+    var topic: String? { get }
+    var canonicalAlias: String? { get }
+    
+    var joinRule: JoinRule? { get }
+    var worldReadable: Bool? { get }
+    var guestCanJoin: Bool { get }
+    var state: Membership? { get }
+}
+
+extension SpaceRoomProxyProtocol {
+    var avatar: RoomAvatar {
+        if isSpace {
+            .space(id: id, name: name, avatarURL: avatarURL)
+        } else { // We don't need to check for heroes, we only do that for DMs.
+            .room(id: id, name: name, avatarURL: avatarURL)
+        }
+    }
+}

ElementX/Sources/Services/Spaces/SpaceServiceProxyProtocol.swift

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+//
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Foundation
+
+enum SpaceServiceProxyError: Error {
+    case sdkError(Error)
+}
+
+// sourcery: AutoMockable
+protocol SpaceServiceProxyProtocol {
+    var joinedSpacesPublisher: CurrentValuePublisher<[SpaceRoomProxyProtocol], Never> { get }
+    
+    func spaceRoomList(for spaceRoom: SpaceRoomProxyProtocol) async -> Result<SpaceRoomListProxyProtocol, SpaceServiceProxyError>
+}