session-ios/Signal/src/view controllers/SignalsNavigationController.m

//
//  SignalsNavigationController.m
//  Signal
//
//  Created by Dylan Bourgeois on 18/11/14.
//  Copyright (c) 2014 Open Whisper Systems. All rights reserved.
//

#import "SignalsNavigationController.h"

#import "UIUtil.h"

@interface SignalsNavigationController ()

@end

static double const STALLED_PROGRESS = 0.9;
@implementation SignalsNavigationController


- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self initializeObserver];
    [TSSocketManager sendNotification];
}

- (void)initializeSocketStatusBar {
    if (!_socketStatusView) {
        _socketStatusView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
    }

    CGRect bar                          = self.navigationBar.frame;
    _socketStatusView.frame             = CGRectMake(0, bar.size.height - 1.0f, self.view.frame.size.width, 1.0f);
    _socketStatusView.progress          = 0.0f;
    _socketStatusView.progressTintColor = [UIColor ows_fadedBlueColor];

    if (![_socketStatusView superview]) {
        [self.navigationBar addSubview:_socketStatusView];
    }
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

#pragma mark - Socket Status Notifications

- (void)initializeObserver {
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(socketDidOpen)
                                                 name:SocketOpenedNotification
                                               object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(socketDidClose)
                                                 name:SocketClosedNotification
                                               object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(socketIsConnecting)
                                                 name:SocketConnectingNotification
                                               object:nil];
}

- (void)socketDidOpen {
    dispatch_async(dispatch_get_main_queue(), ^{
        [_updateStatusTimer invalidate];
        for (UIView *view in self.navigationBar.subviews) {
            if ([view isKindOfClass:[UIProgressView class]]) {
                [view removeFromSuperview];
                _socketStatusView = nil;
            }
        }
    });
}

- (void)socketDidClose {
    dispatch_async(dispatch_get_main_queue(), ^{
        if (_socketStatusView == nil) {
            [self initializeSocketStatusBar];
            _updateStatusTimer = [NSTimer scheduledTimerWithTimeInterval:0.5
                                                                  target:self
                                                                selector:@selector(updateSocketConnecting)
                                                                userInfo:nil
                                                                 repeats:YES];

        } else if (_socketStatusView.progress >= STALLED_PROGRESS) {
            [_updateStatusTimer invalidate];
        }
    });
}

- (void)updateSocketConnecting {
    dispatch_async(dispatch_get_main_queue(), ^{
        double progress = _socketStatusView.progress + 0.05;
        _socketStatusView.progress = (float)MIN(progress, STALLED_PROGRESS);
    });
}

- (void)socketIsConnecting {
    // Nothing to see here currently
}


@end