Merge branch 'develop' into gil/SP1_space_creation

# Conflicts:
#	Riot/Modules/Room/RoomCoordinatorBridgePresenter.swift
#	Riot/Modules/Room/RoomCoordinatorParameters.swift
#	Riot/Modules/Room/RoomViewController.m
#	Riot/Modules/TabBar/TabBarCoordinator.swift

Riot/Modules/Threads/ThreadsCoordinator.swift

@@ -0,0 +1,193 @@
+// File created from FlowTemplate
+// $ createRootCoordinator.sh Threads Threads ThreadList
+/*
+ Copyright 2021 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 UIKit
+
+@objcMembers
+final class ThreadsCoordinator: NSObject, ThreadsCoordinatorProtocol {
+    
+    // MARK: - Properties
+    
+    // MARK: Private
+        
+    private let parameters: ThreadsCoordinatorParameters
+    private var selectedThreadCoordinator: RoomCoordinator?
+    
+    private var navigationRouter: NavigationRouterType {
+        return self.parameters.navigationRouter
+    }
+    
+    // MARK: Public
+
+    // Must be used only internally
+    var childCoordinators: [Coordinator] = []
+    
+    weak var delegate: ThreadsCoordinatorDelegate?
+    
+    // MARK: - Setup
+    
+    init(parameters: ThreadsCoordinatorParameters) {
+        self.parameters = parameters
+        super.init()
+        NotificationCenter.default.addObserver(self,
+                                               selector: #selector(didPopModule(_:)),
+                                               name: NavigationRouter.didPopModule,
+                                               object: nil)
+    }    
+    
+    // MARK: - Public
+    
+    func start() {
+
+        let rootCoordinator: Coordinator & Presentable
+        if let threadId = parameters.threadId {
+            rootCoordinator = createThreadCoordinator(forThreadId: threadId)
+        } else {
+            rootCoordinator = createThreadListCoordinator()
+        }
+        
+        rootCoordinator.start()
+
+        self.add(childCoordinator: rootCoordinator)
+        
+        // Detect when view controller has been dismissed by gesture when presented modally (not in full screen).
+        self.navigationRouter.toPresentable().presentationController?.delegate = self
+        
+        if self.navigationRouter.modules.isEmpty == false {
+            self.navigationRouter.push(rootCoordinator, animated: true, popCompletion: { [weak self] in
+                self?.remove(childCoordinator: rootCoordinator)
+            })
+        } else {
+            self.navigationRouter.setRootModule(rootCoordinator) { [weak self] in
+                self?.remove(childCoordinator: rootCoordinator)
+            }
+        }
+    }
+    
+    func stop() {
+        if selectedThreadCoordinator != nil {
+            let modules = self.navigationRouter.modules
+            //  if a thread is selected from the thread list coordinator, then navigation stack will look like:
+            //  ... -> Screen A -> Thread List Screen -> Thread Screen
+            //  we'll try to pop to Screen A here
+            //  sanity check: navigation stack contains at least 3 items
+            guard modules.count >= 3 else {
+                return
+            }
+            let moduleToGoBack = modules[modules.count - 3]
+            self.navigationRouter.popToModule(moduleToGoBack, animated: true)
+        } else {
+            self.navigationRouter.popModule(animated: true)
+        }
+    }
+    
+    func toPresentable() -> UIViewController {
+        return self.navigationRouter.toPresentable()
+    }
+    
+    // MARK: - Private
+    
+    @objc
+    private func didPopModule(_ notification: Notification) {
+        guard let userInfo = notification.userInfo,
+              let module = userInfo[NavigationRouter.NotificationUserInfoKey.module] as? Presentable,
+              let selectedThreadCoordinator = selectedThreadCoordinator else {
+            return
+        }
+        
+        if module.toPresentable() == selectedThreadCoordinator.toPresentable() {
+            selectedThreadCoordinator.delegate = nil
+            remove(childCoordinator: selectedThreadCoordinator)
+            self.selectedThreadCoordinator = nil
+        }
+    }
+
+    private func createThreadListCoordinator() -> ThreadListCoordinator {
+        let coordinatorParameters = ThreadListCoordinatorParameters(session: self.parameters.session,
+                                                                    roomId: self.parameters.roomId)
+        let coordinator = ThreadListCoordinator(parameters: coordinatorParameters)
+        coordinator.delegate = self
+        return coordinator
+    }
+    
+    private func createThreadCoordinator(forThreadId threadId: String) -> RoomCoordinator {
+        let parameters = RoomCoordinatorParameters(navigationRouter: navigationRouter,
+                                                   navigationRouterStore: nil,
+                                                   session: parameters.session,
+                                                   parentSpaceId: nil,
+                                                   roomId: parameters.roomId,
+                                                   eventId: nil,
+                                                   threadId: threadId,
+                                                   displayConfiguration: .forThreads)
+        let coordinator = RoomCoordinator(parameters: parameters)
+        coordinator.delegate = self
+        return coordinator
+    }
+}
+
+// MARK: - UIAdaptivePresentationControllerDelegate
+extension ThreadsCoordinator: UIAdaptivePresentationControllerDelegate {
+    
+    func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
+        self.delegate?.threadsCoordinatorDidDismissInteractively(self)
+    }
+}
+
+// MARK: - ThreadListCoordinatorDelegate
+extension ThreadsCoordinator: ThreadListCoordinatorDelegate {
+    func threadListCoordinatorDidLoadThreads(_ coordinator: ThreadListCoordinatorProtocol) {
+        
+    }
+    
+    func threadListCoordinatorDidSelectThread(_ coordinator: ThreadListCoordinatorProtocol, thread: MXThread) {
+        let roomCoordinator = createThreadCoordinator(forThreadId: thread.id)
+        selectedThreadCoordinator = roomCoordinator
+        roomCoordinator.start()
+        self.add(childCoordinator: roomCoordinator)
+    }
+    
+    func threadListCoordinatorDidSelectRoom(_ coordinator: ThreadListCoordinatorProtocol, roomId: String, eventId: String) {
+        self.delegate?.threadsCoordinatorDidSelect(self, roomId: roomId, eventId: eventId)
+    }
+    
+    func threadListCoordinatorDidCancel(_ coordinator: ThreadListCoordinatorProtocol) {
+        self.delegate?.threadsCoordinatorDidComplete(self)
+    }
+}
+
+//  MARK: - RoomCoordinatorDelegate
+
+extension ThreadsCoordinator: RoomCoordinatorDelegate {
+    
+    func roomCoordinatorDidLeaveRoom(_ coordinator: RoomCoordinatorProtocol) {
+        
+    }
+    
+    func roomCoordinatorDidCancelRoomPreview(_ coordinator: RoomCoordinatorProtocol) {
+        
+    }
+    
+    func roomCoordinator(_ coordinator: RoomCoordinatorProtocol, didSelectRoomWithId roomId: String, eventId: String?) {
+        self.delegate?.threadsCoordinatorDidSelect(self, roomId: roomId, eventId: eventId)
+    }
+    
+    func roomCoordinatorDidDismissInteractively(_ coordinator: RoomCoordinatorProtocol) {
+        
+    }
+    
+}