- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 20;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    cell.textLabel.text = @"Vasiliy Pupkin";
    return cell;
}

#import <UIKit/UIKit.h>

// Добавим нужный протокол к интерфейсу
@interface NKLoginViewController : UIViewController <UITextFieldDelegate>

@end

#import "NKLoginViewController.h"

@interface NKLoginViewController ()

@property (weak, nonatomic) IBOutlet UITextField *emailTextField;
@property (weak, nonatomic) IBOutlet UITextField *passwordTextField;

- (IBAction)loginTouched:(UIButton *)sender;

@end

@implementation NKLoginViewController

#pragma mark - UITextFieldDelegate -

// Сделаем так, чтобы по нажатию "Done" клавиатура пряталась
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}

#pragma mark - Button methods -

// Пока что просто переместимся на следующий экран по нажатию кнопки "Войти".
- (IBAction)loginTouched:(UIButton *)sender
{
    [self performSegueWithIdentifier:@"SegueToChatList" sender:self];
}

#import "NKChatViewController.h"

@interface NKChatViewController ()

@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (weak, nonatomic) IBOutlet UITextField *messageTextField;

- (IBAction)sendTouched:(UIButton *)sender;

@end

@implementation NKChatViewController

#pragma mark - View Controller life cycle -

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    // Показываем клавиатуру, как только попадаем на контроллер
    [_messageTextField becomeFirstResponder];
}

#pragma mark - UITableViewDataSource -

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 20;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
    cell.textLabel.text = @"Вася Пупкен";
    cell.detailTextLabel.text = @"Привет, как дела?";
    return cell;
}

#pragma mark - Button methods -

- (IBAction)sendTouched:(UIButton *)sender
{
    
}

@end

#import <UIKit/UIKit.h>
#import <SocialCommunication/SocialCommunication.h>

@interface NKAppDelegate : C2CallAppDelegate <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

@implementation NKAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.affiliateid = @"6B9DF5671444320162B";
    self.secret = @"2fd9cd18aa4d957a4030c0455101646d";
    
    return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

@end

#import "NKChat.h"
#import <SocialCommunication/SocialCommunication.h>

@implementation NKChat

#pragma mark - Singleton pattern -

// 1
+ (instancetype)sharedManager
{
    static NKChat *sharedChat = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedChat = [self new];
    });
    return sharedChat;
}

#pragma mark - Accessors -

// 2
- (NSArray *)chatHistory
{
    return [self fetchChatHistory];
}

#pragma mark - General methods -

// 3
- (void)login:(NSString *)email password:(NSString *)password success:(void(^)())successBlock failure:(void(^)())failureBlock
{
    NSDictionary *dictionary = @{@"EMail":email,
                                 @"Password":password};
    
    [[C2CallPhone currentPhone] registerUser:dictionary
                       withCompletionHandler:^(BOOL success, NSString *result) {                           if (success) {
                               [[C2CallPhone currentPhone] startC2CallPhone];
                               successBlock();
                           } else {
                               failureBlock();
                           }
                       }];
}

// 4
- (void)logout
{
    [(C2CallAppDelegate *)[UIApplication sharedApplication].delegate logoutUser];
}

// 5
- (void)sendMessage:(NSString *)message toUser:(NSString *)userId
{
    [[C2CallPhone currentPhone] submitMessage:message toUser:userId];
}

// 6
- (NSArray *)fetchChatHistory
{
    // Получаем все Managed Object истории чата
    NSFetchRequest *request = [[SCDataManager instance] fetchRequestForChatHistory:YES];
    NSFetchedResultsController *controller = [[SCDataManager instance] fetchedResultsControllerWithFetchRequest:request sectionNameKeyPath:nil cacheName:nil];
    NSError *error;
    [controller performFetch:&error];
    
    // Собираем результирующий массив
    NSMutableArray *result = [NSMutableArray array];
    for (NSManagedObject *chat in controller.fetchedObjects) {
        // Получаем словарь чата
        NSArray *chatKeys = @[@"contact", @"lastTimestamp", @"missedEvents"];
        NSMutableDictionary *inChat = [[chat dictionaryWithValuesForKeys:chatKeys] mutableCopy];
        
        // Проверяем на дубликаты
        NSMutableDictionary *dublicate = nil;
        for (NSMutableDictionary *dict in result) {
            if ([dict[@"contact"] isEqualToString:inChat[@"contact"]]) {
                dublicate = dict;
                break;
            }
        }
        
        // Получаем все сообщения
        NSMutableArray *messages = (dublicate) ? dublicate[@"messages"] : [NSMutableArray array];
        for (NSManagedObject *chatEvent in [chat valueForKey:@"chatHistory"]) {
            NSArray *chatEventKeys = [[[chatEvent entity] attributesByName] allKeys];
            NSMutableDictionary *inChatEvent = [[chatEvent dictionaryWithValuesForKeys:chatEventKeys] mutableCopy];
            //            NSLog(@"%@",inChatEvent);
            inChatEvent[@"ManagedObject"] = chatEvent;
            [messages addObject:inChatEvent];
        }
        [messages sortUsingDescriptors:@[[NSSortDescriptor sortDescriptorWithKey:@"timevalue" ascending:YES]]];
        
        if (dublicate) {
            dublicate[@"messages"] = messages;
            [dublicate[@"ManagedObjects"] addObject:chat];
            dublicate[@"missedEvents"] = @([dublicate[@"missedEvents"] intValue] + [inChat[@"missedEvents"] intValue]);
            if (!dublicate[@"name"])
                dublicate[@"name"] = inChat[@"name"];
        } else {
            inChat[@"messages"] = messages;
            inChat[@"ManagedObjects"] = [NSMutableArray arrayWithObject:chat];
        }
        
        // Добавляем словарь в результат
        if (!dublicate)
            [result addObject:inChat];
    }
    
    // Сортируем результат
    [result sortUsingDescriptors:@[[NSSortDescriptor sortDescriptorWithKey:@"lastTimestamp" ascending:NO]]];
    
    // Возвращаем результирующий массив
    return [result copy];
}

@end

#import "NKAppDelegate.h"

@implementation NKAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.affiliateid = @"6B9DF5671444320162B";
    self.secret = @"2fd9cd18aa4d957a4030c0455101646d";
    [NKChat sharedManager];
    return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

@end

- (IBAction)loginTouched:(UIButton *)sender
{
    sender.enabled = NO;
    [[NKChat sharedManager] login:_emailTextField.text
                         password:_passwordTextField.text
                          success:^{
                              [self performSegueWithIdentifier:@"SegueToChatList" sender:self];
                              sender.enabled = YES;
                          }
                          failure:^{
                              sender.enabled = YES;
                          }];
}

#import "NKChatListTableViewController.h"

@interface NKChatListTableViewController ()

@end

@implementation NKChatListTableViewController

#pragma mark - UITableViewDataSource -

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 2;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    cell.textLabel.text = (indexPath.row) ? @"nikita@borodutch.com" : @"luke@borodutch.com";
    return cell;
}

@end

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(UITableViewCell *)sender
{
    UIViewController *dest = segue.destinationViewController;
    dest.title = sender.textLabel.text;
}

#import "NKChatViewController.h"
#import <SocialCommunication/SocialCommunication.h>
#import "NKChat.h"

@interface NKChatViewController ()

@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (weak, nonatomic) IBOutlet UITextField *messageTextField;

- (IBAction)sendTouched:(UIButton *)sender;

@end

@implementation NKChatViewController
{
    NSArray *tableData;
}

#pragma mark - View Controller life cycle -

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 1
    tableData = [self getTableData];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    // Показываем клавиатуру, как только попадаем на контроллер
    [_messageTextField becomeFirstResponder];
    
    // 2
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receivedMessage) name:@"kC2CallPhoneReceivedMessage" object:nil];
}

#pragma mark - UITableViewDataSource -

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // 3
    return tableData.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 4
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
    cell.textLabel.text = ([tableData[indexPath.row][@"eventType"] isEqualToString:@"MessageIn"]) ? self.title : @"Я";
    cell.detailTextLabel.text = tableData[indexPath.row][@"text"];
    return cell;
}

#pragma mark - Button methods -

- (IBAction)sendTouched:(UIButton *)sender
{
    // 5
    [[NKChat sharedManager] sendMessage:_messageTextField.text
                                 toUser:@"c45645f71465dcff18e"];
    [self addMessage:_messageTextField.text];
    _messageTextField.text = @"";
}

#pragma mark - General Methods -

- (void)addMessage:(NSString *)message
{
    // 6
    NSMutableArray *mTableData = [tableData mutableCopy];
    [mTableData addObject:@{@"text":message,
                            @"eventType":@"MessageOut"}];
    tableData = mTableData;
    [_tableView reloadData];
}

- (void)receivedMessage
{
    // 7
    tableData = [self getTableData];
    [_tableView reloadData];
}

- (NSArray *)getTableData
{
    // 8
    for (NSDictionary *chat in [NKChat sharedManager].chatHistory)
        if ([chat[@"contact"] isEqualToString:self.title])
            return chat[@"messages"];
    return nil;
}

@end