Smartlist: Add Editing mode and swipe to delete conversations

Add Editing mode and swipe gesture on the smartlist to delete
conversations using RxDatasources itemDeleted and Realm delete.

Change-Id: I8c171d4da0c5ed3fc5bb61231501ef786d14c89b

Ring/Cartfile.resolved

 github "ReactiveX/RxSwift" "3.5.0"
-github "RxSwiftCommunity/RxDataSources" "1.0.3"
+github "RxSwiftCommunity/RxDataSources" "1.0.4"
 github "RxSwiftCommunity/RxRealm" "0.6.0"
 github "pkluz/PKHUD" "4.2.3"
 github "realm/realm-cocoa" "v2.8.3"

Ring/Ring/Conversations/ConversationViewModel.swift

@@ -49,8 +49,8 @@ class ConversationViewModel {
 
         //Create observable from sorted conversations and flatMap them to view models
         self.messages = self.conversationsService.conversations.map({ conversations in
-            return conversations.filter({ currentConversation in
-                return currentConversation.recipient == conversation.recipient
+            return conversations.filter({ conv in
+                return conv.isEqual(conversation)
             }).flatMap({ conversation in
                 conversation.messages.map({ message in
                     return MessageViewModel(withMessage: message)

Ring/Ring/Services/ConversationsService.swift

@@ -129,6 +129,18 @@ class ConversationsService: MessagesAdapterDelegate {
         })
     }
 
+    func deleteConversation(conversation: ConversationModel) {
+        try! realm.write {
+
+            //Remove all messages from the conversation
+            for message in conversation.messages {
+                realm.delete(message)
+            }
+
+            realm.delete(conversation)
+        }
+    }
+
     //MARK: Message Adapter delegate
 
     func didReceiveMessage(_ message: Dictionary<String, String>, from senderAccount: String,

Ring/Ring/Smartlist/SmartlistViewController.swift

@@ -79,12 +79,19 @@ class SmartlistViewController: UIViewController {
         self.viewModel.hideNoConversationsMessage
             .bind(to: self.noConversationsView.rx.isHidden)
             .addDisposableTo(disposeBag)
+
+        self.navigationItem.rightBarButtonItem = self.editButtonItem
     }
 
     override func viewDidAppear(_ animated: Bool) {
         super.viewDidAppear(animated)
     }
 
+    override func setEditing(_ editing: Bool, animated: Bool) {
+        super.setEditing(editing, animated: animated)
+        self.conversationsTableView.setEditing(editing, animated: true)
+    }
+
     func keyboardWillShow(withNotification notification: Notification) {
         let userInfo: Dictionary = notification.userInfo!
         let keyboardFrame: NSValue = userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue
@@ -125,6 +132,11 @@ class SmartlistViewController: UIViewController {
             return cell
         }
 
+        //Allows to delete
+        conversationsDataSource.canEditRowAtIndexPath = { _ in
+            return true
+        }
+
         conversationsDataSource.configureCell = configureCell
         searchResultsDatasource.configureCell = configureCell
 
@@ -171,11 +183,11 @@ class SmartlistViewController: UIViewController {
         }).addDisposableTo(disposeBag)
 
         //Deselect the rows
-        self.conversationsTableView.rx.itemSelected.asObservable().subscribe(onNext: { indexPath in
+        self.conversationsTableView.rx.itemSelected.subscribe(onNext: { [unowned self] indexPath in
             self.conversationsTableView.deselectRow(at: indexPath, animated: true)
         }).addDisposableTo(disposeBag)
 
-        self.searchResultsTableView.rx.itemSelected.asObservable().subscribe(onNext: { indexPath in
+        self.searchResultsTableView.rx.itemSelected.subscribe(onNext: { [unowned self] indexPath in
             self.searchResultsTableView.deselectRow(at: indexPath, animated: true)
         }).addDisposableTo(disposeBag)
 
@@ -186,6 +198,12 @@ class SmartlistViewController: UIViewController {
             .addDisposableTo(disposeBag)
 
         self.searchResultsTableView.rx.setDelegate(self).addDisposableTo(disposeBag)
+
+        //Swipe to delete action
+        self.conversationsTableView.rx.itemDeleted.subscribe(onNext:{ [unowned self] indexPath in
+            let convToDelete :ConversationViewModel = try! self.conversationsTableView.rx.model(at: indexPath)
+            self.viewModel.delete(conversationViewModel: convToDelete)
+        }).addDisposableTo(disposeBag)
     }
 
     func setupSearchBar() {

Ring/Ring/Smartlist/SmartlistViewModel.swift

@@ -108,7 +108,7 @@ class SmartlistViewModel {
         }).observeOn(MainScheduler.instance)
 
         //Observes search bar text
-        searchBarText.asObservable().subscribe(onNext: { [unowned self] text in
+        searchBarText.asObservable().observeOn(MainScheduler.instance).subscribe(onNext: { [unowned self] text in
             self.search(withText: text)
         }).addDisposableTo(disposeBag)
 
@@ -181,4 +181,14 @@ class SmartlistViewModel {
                 .addDisposableTo(disposeBag)
         }
     }
+
+    func delete(conversationViewModel: ConversationViewModel) {
+
+        if let index = self.conversationViewModels.index(where: ({ cvm in
+            cvm.conversation.recipient?.ringId == conversationViewModel.conversation.recipient?.ringId
+        })) {
+            self.conversationsService.deleteConversation(conversation: conversationViewModel.conversation)
+            self.conversationViewModels.remove(at: index)
+        }
+    }
 }