/*

     File: ExportProgressViewController.m

 Abstract: Table view controller that manages displaying export information.

  Version: 1.0

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 */

#import <AVFoundation/AVFoundation.h>

#import "ExportProgressViewController.h"

@interface ExportProgressViewController ()

@property(readonly, strong) UIBarButtonItem *doneButton;

@property(readwrite, strong) NSTimer *timer;

@end

@implementation ExportProgressViewController

@synthesize state = _state;

@synthesize progressView = _progressView;

@synthesize assetItem = _assetItem;

@synthesize doneButton = _doneButton;

@synthesize timer = _timer;

- (id)initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle

{

    self = [super initWithNibName:nibName bundle:nibBundle];

    if (self) 

    {

        self.progressView.progress = 0.0;

        // Create a timer that updates the progress and export status information

        NSTimeInterval seconds = 0.5;

        _timer = [NSTimer scheduledTimerWithTimeInterval:seconds 

                                                   target:self 

                                                 selector:@selector(updateProgress) userInfo:nil repeats:YES];

        // Allow the user to tap "Done" when the export finishes, cancels, or fails

        _doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(doneAction:)];

        self.navigationItem.leftBarButtonItem = _doneButton;

        _doneButton.enabled = NO;

    }

    return self;

}

- (void)dealloc

{

    [_timer invalidate];

}

// Update the export UI depending on the status of the current export

- (void)updateProgress

{

    BOOL finishedExport = self.assetItem.finishedExport;

    self.progressView.progress = self.assetItem.exportSession.progress;

    self.state.text = self.assetItem.progressLabel;

    if (finishedExport)

    {

        [self.timer invalidate];

        self.timer = nil;

        self.doneButton.enabled = YES;

    }

}

#pragma mark - UIViewController

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    return YES;

}

- (void)viewDidLoad

{

    self.title = @"Export";

    [super viewDidLoad];

}

#pragma mark - Callbacks

- (void)doneAction:(id)sender

{

    [self.navigationController dismissModalViewControllerAnimated:YES];

}

@end