custom segue

//
//  PvlseFromBottomSegue.m
//  Pvlse
//
//  Created by Daniel Banks on 2/9/14.
//  Copyright (c) 2014 Pvlse. All rights reserved.
//

#import "PvlseFromBottomSegue.h"
#import "PvlseNavigationController.h"

@implementation PvlseFromBottomSegue

UIViewController *sourceViewController;
UIViewController *destinationViewController;
PvlseNavigationController *navViewController;
PvlseCheckInViewController *checkInViewController;
BOOL showing; // Stores if we are showing the check in view controller or hiding it

- (id)initWithIdentifier:(NSString *)identifier source:(UIViewController *)source destination:(UIViewController *)destination
{
    self = [super initWithIdentifier:identifier source:source destination:destination];
    if (self) {
        // Custom initialization
    }
    return self;
}


// Performs the segue
-(void)perform
{
    [self setUpControllers];
    [self addViews];
    [self setUpInitialState];
    [self performAnimation];
}


- (void)setUpControllers
{
    sourceViewController      = (UIViewController *) self.sourceViewController;
    destinationViewController = (UIViewController *) self.destinationViewController;
    
    if ([sourceViewController class] == [PvlseCheckInViewController class]) {
        navViewController = self.destinationViewController;
        checkInViewController = (PvlseCheckInViewController *)self.sourceViewController;
        showing = NO;
    } else {
        navViewController  = (PvlseNavigationController *)sourceViewController.navigationController;
        checkInViewController = (PvlseCheckInViewController *)self.destinationViewController;
        showing = YES;
    }
}

- (void)addViews
{
    if (showing) {
        [navViewController.view addSubview:checkInViewController.view];
        [checkInViewController.view setFrame:navViewController.view.window.frame];
    }
}

- (void)setUpInitialState
{
    if (showing) {
        // Place the check in view off screen
        [checkInViewController.view setTransform:CGAffineTransformMakeTranslation(0, navViewController.view.frame.size.height)];
    } else {
//        [navViewController setNeedsStatusBarAppearanceUpdate];
    }
}

- (void)performAnimation
{
    [UIView animateWithDuration:0.35
                          delay:0.0
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         [self finishedState];
                     }
                     completion:^(BOOL finished){
                         [self finishedAnimation];
                     }];
}

- (void)finishedState
{
    if (showing) {
        [checkInViewController.view setTransform:CGAffineTransformMakeTranslation(0, 0)];
    } else {
        [checkInViewController.view setTransform:CGAffineTransformMakeTranslation(0, navViewController.view.frame.size.height)];
    }
}

- (void)finishedAnimation
{
    if (showing) {
        navViewController.checkInViewController = checkInViewController;
    } else {
        // Remove the view and remove the reference to the view controller
        [checkInViewController.view removeFromSuperview];
    }
    [navViewController.topViewController setNeedsStatusBarAppearanceUpdate];
}

@end