Add support for Apple context menus in matrix items list screens (#5963)

Riot/Modules/ContextMenu/ContextMenuProviders/PublicRoomContextMenuProvider.swift

@@ -0,0 +1,83 @@
+// 
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+/// Helper class `PublicRoomContextMenuProvider` that provides an instace of `UIContextMenuConfiguration` from an instance of `MXPublicRoom`
+@objcMembers
+class PublicRoomContextMenuProvider: NSObject {
+    
+    weak var serviceDelegate: RoomContextActionServiceDelegate?
+    private var currentService: RoomContextActionServiceProtocol?
+    
+    @available(iOS 13.0, *)
+    func contextMenuConfiguration(with publicRoom: MXPublicRoom, from cell: UIView, session: MXSession) -> UIContextMenuConfiguration? {
+        if let room = session.room(withRoomId: publicRoom.roomId) {
+            let service = RoomContextActionService(room: room, delegate: serviceDelegate)
+            self.currentService = service
+            let actionProvider = RoomActionProvider(service: service)
+            return UIContextMenuConfiguration(identifier: publicRoom.jsonString() as? NSString) {
+                if room.summary?.isJoined == true {
+                    let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
+                    guard let roomViewController = storyboard.instantiateViewController(withIdentifier: "RoomViewControllerStoryboardId") as? RoomViewController else {
+                        return nil
+                    }
+                    roomViewController.isContextPreview = true
+                    
+                    let roomDataSourceManager = MXKRoomDataSourceManager.sharedManager(forMatrixSession: session)
+                    roomDataSourceManager?.roomDataSource(forRoom: room.roomId, create: true, onComplete: { roomDataSource in
+                        roomViewController.displayRoom(roomDataSource)
+                    })
+                    
+                    return roomViewController
+                } else {
+                    let viewModel = RoomContextPreviewViewModel(room: room)
+                    return RoomContextPreviewViewController.instantiate(with: viewModel, mediaManager: session.mediaManager)
+                }
+            } actionProvider: { suggestedActions in
+                return actionProvider.menu
+            }
+        } else {
+            let service = UnownedRoomContextActionService(roomId: publicRoom.roomId, canonicalAlias: publicRoom.canonicalAlias, session: session, delegate: serviceDelegate)
+            self.currentService = service
+            let actionProvider = PublicRoomActionProvider(publicRoom: publicRoom, service: service)
+            return UIContextMenuConfiguration(identifier: publicRoom.jsonString() as? NSString) {
+                let viewModel = PublicRoomContextPreviewViewModel(publicRoom: publicRoom)
+                return RoomContextPreviewViewController.instantiate(with: viewModel, mediaManager: session.mediaManager)
+            } actionProvider: { suggestedActions in
+                return actionProvider.menu
+            }
+        }
+    }
+    
+    func publicRoom(from identifier: NSCopying) -> MXPublicRoom? {
+        guard let jsonString = identifier as? String, let data = jsonString.data(using: .utf8) else {
+            return nil
+        }
+
+        do {
+            let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
+            
+            guard let publicRoom = MXPublicRoom(fromJSON: json) else {
+                return nil
+            }
+
+            return publicRoom
+        } catch {
+            return nil
+        }
+    }
+}