element-ios/Riot/Modules/Room/RoomInfo/RoomInfoCoordinator.swift

// File created from FlowTemplate
// $ createRootCoordinator.sh Room2 RoomInfo RoomInfoList
/*
 Copyright 2020 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 RoomInfoCoordinator: NSObject, RoomInfoCoordinatorType {
    
    // MARK: - Properties
    
    // MARK: Private
    
    private let navigationRouter: NavigationRouterType
    private let session: MXSession
    private let room: MXRoom
    private let initialSection: RoomInfoSection
    private weak var roomSettingsViewController: RoomSettingsViewController?
    
    private lazy var segmentedViewController: SegmentedViewController = {
        let controller = SegmentedViewController()
        
        let participants = RoomParticipantsViewController()
        participants.finalizeInit()
        participants.enableMention = true
        participants.mxRoom = self.room
        participants.delegate = self
        
        let files = RoomFilesViewController()
        files.finalizeInit()
        MXKRoomDataSource.load(withRoomId: self.room.roomId, andMatrixSession: self.session) { (dataSource) in
            guard let dataSource = dataSource as? MXKRoomDataSource else { return }
            dataSource.filterMessagesWithURL = true
            dataSource.finalizeInitialization()
            files.hasRoomDataSourceOwnership = true
            files.displayRoom(dataSource)
        }
        
        let settings = RoomSettingsViewController()
        settings.finalizeInit()
        settings.initWith(self.session, andRoomId: self.room.roomId)
        
        if self.room.isDirect {
            controller.title = VectorL10n.roomDetailsTitleForDm
        } else {
            controller.title = VectorL10n.roomDetailsTitle
        }
        controller.initWithTitles([
            VectorL10n.roomDetailsPeople,
            VectorL10n.roomDetailsFiles,
            VectorL10n.roomDetailsSettings
        ], viewControllers: [
            participants,
            files,
            settings
        ], defaultSelected: 0)
        controller.addMatrixSession(self.session)
        
        self.roomSettingsViewController = settings
        
        _ = controller.view
        
        return controller
    }()
    
    // MARK: Public

    // Must be used only internally
    var childCoordinators: [Coordinator] = []
    
    weak var delegate: RoomInfoCoordinatorDelegate?
    
    // MARK: - Setup
    
    init(parameters: RoomInfoCoordinatorParameters, navigationRouter: NavigationRouterType? = nil) {
        if let navigationRouter = navigationRouter {
            self.navigationRouter = navigationRouter
        } else {
            self.navigationRouter = NavigationRouter(navigationController: RiotNavigationController())
        }

        self.session = parameters.session
        self.room = parameters.room
        self.initialSection = parameters.initialSection
    }    
    
    // MARK: - Public methods
    
    func start() {
        let rootCoordinator = self.createRoomInfoListCoordinator()

        rootCoordinator.start()

        self.add(childCoordinator: rootCoordinator)
        
        if self.navigationRouter.modules.isEmpty == false {
            self.navigationRouter.push(rootCoordinator.toPresentable(), animated: true, popCompletion: nil)
        } else {
            self.navigationRouter.setRootModule(rootCoordinator)
        }

        switch initialSection {
        case .addParticipants:
            self.showRoomDetails(with: .members, animated: false)
        case .changeAvatar:
            self.showRoomDetails(with: .settings(RoomSettingsViewControllerFieldAvatar), animated: false)
        case .changeTopic:
            self.showRoomDetails(with: .settings(RoomSettingsViewControllerFieldTopic), animated: false)
        case .none:
            break
        }
    }
    
    func toPresentable() -> UIViewController {
        return self.navigationRouter.toPresentable()
    }
    
    // MARK: - Private methods

    private func createRoomInfoListCoordinator() -> RoomInfoListCoordinator {
        let coordinator = RoomInfoListCoordinator(session: self.session, room: room)
        coordinator.delegate = self
        return coordinator
    }
    
    private func showRoomDetails(with target: RoomInfoListTarget, animated: Bool) {
        switch target {
        case .integrations:
            if let modularVC = IntegrationManagerViewController(for: session, inRoom: room.roomId, screen: kIntegrationManagerMainScreen, widgetId: nil) {
                navigationRouter.present(modularVC, animated: true)
            }
        case .search:
            MXKRoomDataSourceManager.sharedManager(forMatrixSession: session)?.roomDataSource(forRoom: self.room.roomId, create: false, onComplete: { (roomDataSource) in
                guard let dataSource = roomDataSource else { return }
                let storyboard = UIStoryboard(name: "Main", bundle: nil)
                if let search = storyboard.instantiateViewController(withIdentifier: "RoomSearch") as? RoomSearchViewController {
                    search.roomDataSource = dataSource
                    self.navigationRouter.push(search, animated: animated, popCompletion: nil)
                }
            })
        case .notifications:
            break
        default:
            guard let tabIndex = target.tabIndex else {
                fatalError("No settings tab index for this target.")
            }
            segmentedViewController.selectedIndex = tabIndex
            
            if case .settings(let roomSettingsField) = target {
                roomSettingsViewController?.selectedRoomSettingsField = roomSettingsField
            }
            
            navigationRouter.push(segmentedViewController, animated: animated, popCompletion: nil)
        }
    }
}

// MARK: - RoomInfoListCoordinatorDelegate
extension RoomInfoCoordinator: RoomInfoListCoordinatorDelegate {
    
    func roomInfoListCoordinator(_ coordinator: RoomInfoListCoordinatorType, wantsToNavigateTo target: RoomInfoListTarget) {
        self.showRoomDetails(with: target, animated: true)
    }
    
    func roomInfoListCoordinatorDidCancel(_ coordinator: RoomInfoListCoordinatorType) {
        self.delegate?.roomInfoCoordinatorDidComplete(self)
    }

}

extension RoomInfoCoordinator: RoomParticipantsViewControllerDelegate {
    
    func roomParticipantsViewController(_ roomParticipantsViewController: RoomParticipantsViewController!, mention member: MXRoomMember!) {
        
    }
    
}