/*

     File: CommonMetadata.m

 Abstract: A model object that maintains the list of common metadata keys.

  Version: 1.0

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 */

#import "CommonMetadata.h"

#import <AVFoundation/AVFoundation.h>

@implementation CommonMetadata

@synthesize titleString = _titleString;

@synthesize location = _location;

@synthesize copyrightDate = _copyrightDate;

@synthesize locale = _locale;

@synthesize description = _description;

- (id)init

{

    self = [super init];

    if (self)

    {

        _location = [[CLLocation alloc] initWithLatitude:37.332051 longitude:-122.029111];

        _titleString = @"AVMovieExporter Movie";

        _copyrightDate = [NSDate date];

        _locale = [NSLocale currentLocale];

        _description = @"A cool movie I made with AVMovieExporter!";

    }

    return self;

}

- (NSArray *)metadataItems

{

    AVMutableMetadataItem *titleMetadata = [[AVMutableMetadataItem alloc] init];

    titleMetadata.key = AVMetadataCommonKeyTitle;

    titleMetadata.keySpace = AVMetadataKeySpaceCommon;

    titleMetadata.locale = self.locale;

    titleMetadata.value = self.titleString;

    AVMutableMetadataItem *locationMetadata = [[AVMutableMetadataItem alloc] init];

    locationMetadata.key = AVMetadataCommonKeyLocation;

    locationMetadata.keySpace = AVMetadataKeySpaceCommon;

    locationMetadata.locale = self.locale;

    locationMetadata.value = [NSString stringWithFormat:@"%+08.4lf%+09.4lf", self.location.coordinate.latitude, self.location.coordinate.longitude];

    AVMutableMetadataItem *creationDateMetadata = [[AVMutableMetadataItem alloc] init];

    creationDateMetadata.key = AVMetadataCommonKeyCopyrights;

    creationDateMetadata.keySpace = AVMetadataKeySpaceCommon;

    creationDateMetadata.locale = self.locale;

    NSCalendar *cal = [NSCalendar currentCalendar];

    NSDateComponents *components = [cal components:NSYearCalendarUnit fromDate:self.copyrightDate];

    creationDateMetadata.value = [NSString stringWithFormat:@"Copyright %d", [components year]];

    AVMutableMetadataItem *descriptionMetadata = [[AVMutableMetadataItem alloc] init];

    descriptionMetadata.key = AVMetadataCommonKeyDescription;

    descriptionMetadata.keySpace = AVMetadataKeySpaceCommon;

    descriptionMetadata.locale = self.locale;

    descriptionMetadata.value = self.description;

    return [NSArray arrayWithObjects:titleMetadata, locationMetadata, creationDateMetadata, descriptionMetadata, nil];

}

@end