contact requests: present conversation view for contact request

- Makes the contact request items selectable and links them to
  their associated conversation.

Change-Id: I91f1ac47fa513453a3091297f56e4493082dee4b
Reviewed-by: Kateryna Kostiuk <kateryna.kostiuk@savoirfairelinux.com>

Ring/Ring/Features/ContactRequests/ContactRequestsCoordinator.swift

@@ -41,10 +41,23 @@ class ContactRequestsCoordinator: Coordinator, StateableResponsive {
         self.injectionBag = injectionBag
         self.contactService = injectionBag.contactsService
         self.navigationViewController.viewModel = ContactRequestTabBarItem(with: self.injectionBag)
+        self.stateSubject.subscribe(onNext: { [unowned self] (state) in
+            guard let state = state as? ConversationsState else { return }
+            switch state {
+            case .conversationDetail (let conversationViewModel):
+                self.showConversation(withConversationViewModel: conversationViewModel)
+            }
+        }).disposed(by: self.disposeBag)
     }
 
     func start () {
         let contactRequestsViewController = ContactRequestsViewController.instantiate(with: self.injectionBag)
-        self.present(viewController: contactRequestsViewController, withStyle: .show, withAnimation: true)
+        self.present(viewController: contactRequestsViewController, withStyle: .show, withAnimation: true, withStateable: contactRequestsViewController.viewModel)
+    }
+
+    private func showConversation (withConversationViewModel conversationViewModel: ConversationViewModel) {
+        let conversationViewController = ConversationViewController.instantiate(with: self.injectionBag)
+        conversationViewController.viewModel = conversationViewModel
+        self.present(viewController: conversationViewController, withStyle: .show, withAnimation: true)
     }
 }

Ring/Ring/Features/ContactRequests/ContactRequestsViewController.swift

@@ -39,7 +39,12 @@ class ContactRequestsViewController: UIViewController, StoryboardBased, ViewMode
 
     override func viewDidLoad() {
         super.viewDidLoad()
-
+        self.tableView.rx.modelSelected(ContactRequestItem.self)
+            .subscribe({ [unowned self] item in
+                if let ringId = item.element?.contactRequest.ringId {
+                    self.viewModel.showConversation(forRingId: ringId)
+                }
+            }).disposed(by: disposeBag)
         self.navigationItem.title = L10n.Global.contactRequestsTabBarTitle
     }
 
@@ -52,7 +57,7 @@ class ContactRequestsViewController: UIViewController, StoryboardBased, ViewMode
     func setupTableView() {
         self.tableView.estimatedRowHeight = 100.0
         self.tableView.rowHeight = UITableViewAutomaticDimension
-        self.tableView.allowsSelection = false
+        self.tableView.allowsSelection = true
 
         //Register cell
         self.tableView.register(cellType: ContactRequestCell.self)

Ring/Ring/Features/ContactRequests/ContactRequestsViewModel.swift

@@ -22,7 +22,13 @@ import RxSwift
 import Contacts
 import SwiftyBeaver
 
-class ContactRequestsViewModel: ViewModel {
+class ContactRequestsViewModel: Stateable, ViewModel {
+
+    // MARK: - Rx Stateable
+    private let stateSubject = PublishSubject<State>()
+    lazy var state: Observable<State> = {
+        return self.stateSubject.asObservable()
+    }()
 
     let contactsService: ContactsService
     let accountsService: AccountsService
@@ -32,12 +38,16 @@ class ContactRequestsViewModel: ViewModel {
     fileprivate let disposeBag = DisposeBag()
     fileprivate let log = SwiftyBeaver.self
 
+    fileprivate let injectionBag: InjectionBag
+
     required init(with injectionBag: InjectionBag) {
         self.contactsService = injectionBag.contactsService
         self.accountsService = injectionBag.accountService
         self.conversationService = injectionBag.conversationsService
         self.nameService = injectionBag.nameService
 
+        self.injectionBag = injectionBag
+
         self.contactsService.contactRequests
             .asObservable()
             .subscribe(onNext: {[unowned self] contactRequests in
@@ -134,4 +144,12 @@ class ContactRequestsViewModel: ViewModel {
                                               nameserver: "",
                                               address: item.contactRequest.ringId)
     }
+
+    func showConversation (forRingId ringId: String) {
+        let conversationViewModel = ConversationViewModel(with: self.injectionBag)
+        let conversation = self.conversationService.findConversation(withRingId: ringId,
+                                                                     withAccountId: (accountsService.currentAccount?.id)!)
+        conversationViewModel.conversation = conversation
+        self.stateSubject.onNext(ConversationsState.conversationDetail(conversationViewModel: conversationViewModel))
+    }
 }