Racified.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    DeviceSettingsHeaderView *headerView = [[DeviceSettingsHeaderView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, self.tableView.bounds.size.width, DEVICE_HEADER_HEIGHT)];

    // don't need this with the current code
    // RACSignal *newDevice = [RACObserve(self, device) ignore: nil];

    // When the battery level changes, update the string
    RACSignal *batteryChangeSignal = [[RACObserve(self, device.batteryLevel)
        ignore: nil]
        deliverOn:[RACScheduler mainThreadScheduler]];

    // connected state is used in multiple places
    RACSignal *connectedStateSignal = [[RACObserve(self, device.connectedState)
        ignore: nil]
        deliverOn:[RACScheduler mainThreadScheduler]];

    // When the connection state changes, update the font of the label
    CGFloat fontSize = headerView.batteryAndWifiLabel.font.pointSize;
    RAC(headerView.batteryAndWifiLabel, font) = [connectedStateSignal 
        map:^id(NSNumber *deviceConnectedState) {
            BOOL isConnected = deviceConnectedState.integerValue == MorseDeviceConnectedStateConnected;
            return [UIFont fontWithName:isConnected ? FONT_BREE_THIN : FONT_BREE_THIN_OBLIQUE size:fontSize];
        }];

    // When the connection state changes, update the label text
    RAC(headerView.batteryAndWifiLabel, text) = [RACSignal combineLatest:@[batteryChangeSignal, connectedStateSignal]
        reduce:^id(NSNumber *batteryLevel, NSNumber *deviceConnectedState) {
            BOOL isConnected = deviceConnectedState.integerValue == MorseDeviceConnectedStateConnected;
            
            NSString *batteryIsAt = [NSString stringWithFormat:@"%@ %@", NSLocalizedString(@"battery is at", nil),  [DeviceClass stringForBatteryLevel:batteryLevel]];
            NSString *disconnected = NSLocalizedString(@"disconnected", nil);

            return isConnected ? batteryIsAt : disconnected;
        }];

    // When the connection state changes, update the label's color
    RAC(headerView.batteryAndWifiLabel, textColor) = [[connectedStateSignal deliverOn:[RACScheduler mainThreadScheduler]] map:^id(id deviceConnectedState) {
        return [deviceConnectedState integerValue] == MorseDeviceConnectedStateConnected ? [AVHexColor colorWithHex:0x666666] : [AVHexColor colorWithHex:0xF26322];
    }];
    
    RAC(headerView.contentLabel, text) = [[RACObserve(self, device.name) 
        deliverOn:[RACScheduler mainThreadScheduler]] 
        map:^id(id deviceName) {
            return deviceName;
        }];


    self.tableView.tableHeaderView = headerView;
 
}