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/*****************************************************************************
 * VLCPlaylistCollectionViewCell.m
 * VLC for iOS
 *****************************************************************************
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 * Copyright (c) 2013-2018 VideoLAN. All rights reserved.
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 * $Id$
 *
 * Authors: Felix Paul Kühne <fkuehne # videolan.org>
 *          Tamas Timar <ttimar.vlc # gmail.com>
 *          Gleb Pinigin <gpinigin # gmail.com>
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 *          Carola Nitz <nitz.carola # googlemail.com>
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 *
 * Refer to the COPYING file of the official project for license.
 *****************************************************************************/
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#import "VLCPlaylistCollectionViewCell.h"
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#import "VLCThumbnailsCache.h"
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#import "NSString+SupportedMedia.h"
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@interface VLCPlaylistCollectionViewCell ()
{
    UIImage *_checkboxEmptyImage;
    UIImage *_checkboxImage;
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    BOOL _editing;
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}

@end

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@implementation VLCPlaylistCollectionViewCell

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- (void)dealloc
{
    [self _removeObserver];
}

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- (void)awakeFromNib
{
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    _checkboxEmptyImage = [UIImage imageNamed:@"checkboxEmpty"];
    _checkboxImage = [UIImage imageNamed:@"checkbox"];
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    self.metaDataLabel.hidden = YES;
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    [super awakeFromNib];
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}

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+ (NSString *)cellIdentifier
{
    return @"VLCPlaylistCollectionViewCell";
}

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- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
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    _editing = editing;
    self.isSelectedView.hidden = !_editing;
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    [self shake];
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    [self selectionUpdate];
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    [self _updatedDisplayedInformationForKeyPath:@"editing"];
}

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- (void)selectionUpdate
{
    if (self.selected)
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        self.isSelectedView.image = _checkboxImage;
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    else
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        self.isSelectedView.image = _checkboxEmptyImage;
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}

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- (void)shake
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{
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    if (_editing) {
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        [UIView animateWithDuration:0.3 animations:^{
            self.contentView.transform = CGAffineTransformMakeScale(0.9f, 0.9f);
        }];
        CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"];
        CGFloat shakeAngle = 0.02f;
        animation.values = @[@(-shakeAngle), @(shakeAngle)];
        animation.autoreverses = YES;
        animation.duration = 0.125;
        animation.repeatCount = HUGE_VALF;

        [[self layer] addAnimation:animation forKey:@"shakeAnimation"];
        self.contentView.layer.cornerRadius = 10.0;
        self.contentView.clipsToBounds = YES;
    } else {
        [UIView animateWithDuration:0.3 animations:^{
            self.contentView.transform = CGAffineTransformMakeScale(1.0f, 1.0f);
            self.contentView.layer.cornerRadius = 0.0;
            self.contentView.clipsToBounds = NO;
        }];
        [[self layer] removeAnimationForKey:@"shakeAnimation"];
    }
}

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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    [self _updatedDisplayedInformationForKeyPath:keyPath];
}

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- (void)_removeObserver
{
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    @try {
        if ([_mediaObject isKindOfClass:[MLLabel class]]) {
            [_mediaObject removeObserver:self forKeyPath:@"files"];
            [_mediaObject removeObserver:self forKeyPath:@"name"];
        } else if ([_mediaObject isKindOfClass:[MLShow class]])
            [_mediaObject removeObserver:self forKeyPath:@"episodes"];
        else if ([_mediaObject isKindOfClass:[MLShowEpisode class]]) {
            [_mediaObject removeObserver:self forKeyPath:@"name"];
            [_mediaObject removeObserver:self forKeyPath:@"files"];
            [_mediaObject removeObserver:self forKeyPath:@"artworkURL"];
            [_mediaObject removeObserver:self forKeyPath:@"unread"];
        } else if ([_mediaObject isKindOfClass:[MLAlbum class]]) {
            [_mediaObject removeObserver:self forKeyPath:@"name"];
            [_mediaObject removeObserver:self forKeyPath:@"tracks"];
        } else if ([_mediaObject isKindOfClass:[MLAlbumTrack class]]) {
            [_mediaObject addObserver:self forKeyPath:@"unread" options:0 context:nil];
            [_mediaObject removeObserver:self forKeyPath:@"artist"];
            [_mediaObject removeObserver:self forKeyPath:@"title"];
            [_mediaObject removeObserver:self forKeyPath:@"files"];
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            MLFile *anyFileFromTrack = [(MLAlbumTrack *)_mediaObject anyFileFromTrack];
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            if (anyFileFromTrack)
                [anyFileFromTrack removeObserver:self forKeyPath:@"artworkURL"];
        } else if ([_mediaObject isKindOfClass:[MLFile class]]) {
            [_mediaObject removeObserver:self forKeyPath:@"computedThumbnail"];
            [_mediaObject removeObserver:self forKeyPath:@"lastPosition"];
            [_mediaObject removeObserver:self forKeyPath:@"duration"];
            [_mediaObject removeObserver:self forKeyPath:@"fileSizeInBytes"];
            [_mediaObject removeObserver:self forKeyPath:@"title"];
            [_mediaObject removeObserver:self forKeyPath:@"thumbnailTimeouted"];
            [_mediaObject removeObserver:self forKeyPath:@"unread"];
            [_mediaObject removeObserver:self forKeyPath:@"albumTrackNumber"];
            [_mediaObject removeObserver:self forKeyPath:@"album"];
            [_mediaObject removeObserver:self forKeyPath:@"artist"];
            [_mediaObject removeObserver:self forKeyPath:@"genre"];
            [(MLFile*)_mediaObject didHide];
        }
    }
    @catch (NSException *exception) {
        APLog(@"removing observer failed");
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    }
}

- (void)_addObserver
{
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    if ([_mediaObject isKindOfClass:[MLLabel class]]) {
        [_mediaObject addObserver:self forKeyPath:@"files" options:0 context:nil];
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        [_mediaObject addObserver:self forKeyPath:@"name" options:0 context:nil];
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    } else if ([_mediaObject isKindOfClass:[MLShow class]])
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        [_mediaObject addObserver:self forKeyPath:@"episodes" options:0 context:nil];
    else if ([_mediaObject isKindOfClass:[MLShowEpisode class]]) {
        [_mediaObject addObserver:self forKeyPath:@"name" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"files" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"artworkURL" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"unread" options:0 context:nil];
    } else if ([_mediaObject isKindOfClass:[MLAlbum class]]) {
        [_mediaObject addObserver:self forKeyPath:@"name" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"tracks" options:0 context:nil];
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    } else if ([_mediaObject isKindOfClass:[MLAlbumTrack class]]) {
        [_mediaObject addObserver:self forKeyPath:@"unread" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"artist" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"title" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"files" options:0 context:nil];
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        MLFile *anyFileFromTrack = [(MLAlbumTrack *)_mediaObject anyFileFromTrack];
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        if (anyFileFromTrack)
            [anyFileFromTrack addObserver:self forKeyPath:@"artworkURL" options:0 context:nil];
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    } else if ([_mediaObject isKindOfClass:[MLFile class]]) {
        [_mediaObject addObserver:self forKeyPath:@"computedThumbnail" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"lastPosition" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"duration" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"fileSizeInBytes" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"title" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"thumbnailTimeouted" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"unread" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"albumTrackNumber" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"album" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"artist" options:0 context:nil];
        [_mediaObject addObserver:self forKeyPath:@"genre" options:0 context:nil];
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        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(thumbnailWasUpdated:)
                                                     name:MLFileThumbnailWasUpdated
                                                   object:nil];
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        [(MLFile*)_mediaObject willDisplay];
    }
}

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- (void)setMediaObject:(MLFile *)mediaObject
{
    if (_mediaObject != mediaObject) {
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        [self _removeObserver];
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        _mediaObject = mediaObject;
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        // prevent the cell from recycling the current snap for random contents
        self.thumbnailView.image = nil;
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        [self _addObserver];
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    }

    [self _updatedDisplayedInformationForKeyPath:nil];
}

- (void)_updatedDisplayedInformationForKeyPath:(NSString *)keyPath
{
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    self.thumbnailView.contentMode = UIViewContentModeScaleAspectFill;
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    if ([self.mediaObject isKindOfClass:[MLFile class]]) {
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        [self _configureForMLFile:(MLFile *)self.mediaObject];
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    } else if ([self.mediaObject isKindOfClass:[MLLabel class]]) {
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        [self _configureForFolder:(MLLabel *)self.mediaObject];
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    } else if ([self.mediaObject isKindOfClass:[MLAlbum class]]) {
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        [self _configureForAlbum:(MLAlbum *)self.mediaObject];
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    } else if ([self.mediaObject isKindOfClass:[MLAlbumTrack class]]) {
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        [self _configureForAlbumTrack:(MLAlbumTrack *)self.mediaObject];
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    } else if ([self.mediaObject isKindOfClass:[MLShow class]]) {
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        MLShow *mediaObject = (MLShow *)self.mediaObject;
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        [self _configureForShow:mediaObject];
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        if ([keyPath isEqualToString:@"computedThumbnail"] || [keyPath isEqualToString:@"episodes"] || !keyPath || (!self.thumbnailView.image && [keyPath isEqualToString:@"editing"])) {
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            self.thumbnailView.image = [VLCThumbnailsCache thumbnailForManagedObject:mediaObject];
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        }
    } else if ([self.mediaObject isKindOfClass:[MLShowEpisode class]]) {
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        [self _configureForShowEpisode:(MLShowEpisode *)self.mediaObject];
    }
    if (![self.mediaObject isKindOfClass:[MLShow class]] && ([keyPath isEqualToString:@"computedThumbnail"] || !keyPath || (!self.thumbnailView.image && [keyPath isEqualToString:@"editing"]))) {
        self.thumbnailView.image = [VLCThumbnailsCache thumbnailForManagedObject:self.mediaObject];
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    }
    [self setNeedsDisplay];
}

#pragma mark - presentation

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- (void)_configureForShow:(MLShow *)show
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{
    self.titleLabel.text = show.name;
    NSUInteger count = show.episodes.count;
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    NSString *string = @"";
    if (show.releaseYear)
        string = [NSString stringWithFormat:@"%@ — ", show.releaseYear];
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    self.subtitleLabel.text = [string stringByAppendingString:[NSString stringWithFormat:(count > 1) ? NSLocalizedString(@"LIBRARY_EPISODES", nil) : NSLocalizedString(@"LIBRARY_SINGLE_EPISODE", nil), count, show.unreadEpisodes.count]];
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    self.mediaIsUnreadView.hidden = YES;
    self.progressView.hidden = YES;
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    self.folderIconView.image = [UIImage imageNamed:@"tvShow"];
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    self.folderIconView.hidden = NO;
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}

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- (void)_configureForAlbumTrack:(MLAlbumTrack *)albumTrack
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{
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    MLFile *anyFileFromTrack = albumTrack.anyFileFromTrack;
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    self.subtitleLabel.text = [NSString stringWithFormat:@"%@ — %@ — %@", albumTrack.artist, [NSString stringWithFormat:NSLocalizedString(@"LIBRARY_TRACK_N", nil), albumTrack.trackNumber.intValue], [VLCTime timeWithNumber:[anyFileFromTrack duration]]];
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    self.titleLabel.text = albumTrack.title;
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    [self _showPositionOfItem:anyFileFromTrack];
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    self.folderIconView.hidden = YES;
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}

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- (void)_configureForShowEpisode:(MLShowEpisode *)showEpisode
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{
    self.titleLabel.text = showEpisode.name;
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    MLFile *anyFileFromEpisode = showEpisode.files.anyObject;
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    if (self.titleLabel.text.length < 1) {
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        self.titleLabel.text = [NSString stringWithFormat:@"S%02dE%02d", showEpisode.seasonNumber.intValue, showEpisode.episodeNumber.intValue];
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        self.subtitleLabel.text = [NSString stringWithFormat:@"%@", [VLCTime timeWithNumber:[anyFileFromEpisode duration]]];
    } else
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        self.subtitleLabel.text = [NSString stringWithFormat:@"S%02dE%02d — %@", showEpisode.seasonNumber.intValue, showEpisode.episodeNumber.intValue, [VLCTime timeWithNumber:[anyFileFromEpisode duration]]];
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    [self _showPositionOfItem:anyFileFromEpisode];
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    self.folderIconView.hidden = YES;
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}

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- (void)_configureForAlbum:(MLAlbum *)album
{
    self.titleLabel.text = album.name;
    MLAlbumTrack *anyTrack = [album.tracks anyObject];
    NSUInteger count = album.tracks.count;
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    NSMutableString *string = [[NSMutableString alloc] init];
    if (anyTrack) {
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        if (anyTrack.artist.length > 0) {
            [string appendString:anyTrack.artist];
            [string appendString:@" — "];
        }
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    }
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    [string appendString:[NSString stringWithFormat:(count > 1) ? NSLocalizedString(@"LIBRARY_TRACKS", nil) : NSLocalizedString(@"LIBRARY_SINGLE_TRACK", nil), count]];
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    if (album.releaseYear.length > 0)
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        [string appendFormat:@" — %@", album.releaseYear];
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    self.subtitleLabel.text = string;
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    self.mediaIsUnreadView.hidden = YES;
    self.progressView.hidden = YES;
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    self.folderIconView.hidden = YES;
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}

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- (void)_configureForFolder:(MLLabel *)label
{
    self.titleLabel.text = label.name;
    NSUInteger count = label.files.count;
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    self.subtitleLabel.text = (count == 1) ? NSLocalizedString(@"ONE_FILE", nil) : [NSString stringWithFormat:NSLocalizedString(@"NUM_OF_FILES", nil), count];
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    self.mediaIsUnreadView.hidden = YES;
    self.progressView.hidden = YES;
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    self.folderIconView.image = [UIImage imageNamed:@"folderIcon"];
    self.folderIconView.hidden = NO;
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}

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- (void)_configureForMLFile:(MLFile *)mediaFile
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{
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    if (mediaFile.isAlbumTrack) {
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        NSString *string = @"";
        if (mediaFile.albumTrack.artist)
            string = [NSString stringWithFormat:@"%@ — ", mediaFile.albumTrack.artist];
        else if (mediaFile.albumTrack.album.name)
            string = [NSString stringWithFormat:@"%@ — ", mediaFile.albumTrack.artist];
        self.titleLabel.text = [string stringByAppendingString:(mediaFile.albumTrack.title.length > 1) ? mediaFile.albumTrack.title : mediaFile.title];
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    } else
        self.titleLabel.text = mediaFile.title;

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    if (_editing)
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        self.subtitleLabel.text = [NSString stringWithFormat:@"%@ — %@", [VLCTime timeWithNumber:[mediaFile duration]], [NSByteCountFormatter stringFromByteCount:[mediaFile fileSizeInBytes] countStyle:NSByteCountFormatterCountStyleFile]];
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    else {
        self.subtitleLabel.text = [NSString stringWithFormat:@"%@", [VLCTime timeWithNumber:[mediaFile duration]]];
        if (mediaFile.videoTrack) {
            NSString *width = [[mediaFile videoTrack] valueForKey:@"width"];
            NSString *height = [[mediaFile videoTrack] valueForKey:@"height"];
            if (width.intValue > 0 && height.intValue > 0)
                self.subtitleLabel.text = [self.subtitleLabel.text stringByAppendingFormat:@" — %@x%@", width, height];
        }
    }
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    [self _showPositionOfItem:mediaFile];
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    self.folderIconView.hidden = YES;
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}

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- (void)_showPositionOfItem:(MLFile *)mediaLibraryFile
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{
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    if (!mediaLibraryFile)
        return;
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    CGFloat position = mediaLibraryFile.lastPosition.floatValue;
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    CGFloat duration = mediaLibraryFile.duration.floatValue;

    if (position > .05f && position < .95f && (duration * position - duration) < -60000) {
        [(UITextView*)self.mediaIsUnreadView setText:[NSString stringWithFormat:NSLocalizedString(@"LIBRARY_MINUTES_LEFT", nil), [[VLCTime timeWithInt:(duration * position - duration)] minuteStringValue]]];
        self.mediaIsUnreadView.hidden = NO;
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    } else if (position != 0.) {
        self.mediaIsUnreadView.hidden = YES;
    } else {
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        [(UILabel *)self.mediaIsUnreadView setText:[NSLocalizedString(@"NEW", nil) capitalizedStringWithLocale:[NSLocale currentLocale]]];
        self.mediaIsUnreadView.hidden = NO;
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    }
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}

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- (void)showMetadata:(BOOL)showMeta
{
    if (showMeta) {
        NSMutableString *mediaInfo = [[NSMutableString alloc] init];

        MLFile *theFile;
        if ([self.mediaObject isKindOfClass:[MLFile class]])
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            theFile = (MLFile *)self.mediaObject;
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        else if ([self.mediaObject isKindOfClass:[MLShowEpisode class]])
            theFile = [[(MLShowEpisode *)self.mediaObject files]anyObject];
        else if ([self.mediaObject isKindOfClass:[MLAlbumTrack class]])
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            theFile = [(MLAlbumTrack *)self.mediaObject anyFileFromTrack];
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        if (!theFile) {
            self.metaDataLabel.hidden = YES;
            return;
        }

        NSMutableArray *videoTracks = [[NSMutableArray alloc] init];
        NSMutableArray *audioTracks = [[NSMutableArray alloc] init];
        NSMutableArray *spuTracks = [[NSMutableArray alloc] init];
        NSArray *tracks = [[theFile tracks] allObjects];
        NSUInteger trackCount = tracks.count;

        for (NSUInteger x = 0; x < trackCount; x++) {
            NSManagedObject *track = tracks[x];
            NSString *trackEntityName = [[track entity] name];
            if ([trackEntityName isEqualToString:@"VideoTrackInformation"])
                [videoTracks addObject:track];
            else if ([trackEntityName isEqualToString:@"AudioTrackInformation"])
                [audioTracks addObject:track];
            else if ([trackEntityName isEqualToString:@"SubtitlesTrackInformation"])
                [spuTracks addObject:track];
        }

        /* print video info */
        trackCount = videoTracks.count;

        if (trackCount > 0) {
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            if (trackCount != 1)
                [mediaInfo appendFormat:@"%lu video tracks", (unsigned long)trackCount];
            else
                [mediaInfo appendString:@"1 video track"];

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            [mediaInfo appendString:@" ("];
            for (NSUInteger x = 0; x < trackCount; x++) {
                int fourcc = [[videoTracks[x] valueForKey:@"codec"] intValue];
                if (x != 0)
                    [mediaInfo appendFormat:@", %4.4s", (char *)&fourcc];
                else
                    [mediaInfo appendFormat:@"%4.4s", (char *)&fourcc];
            }
            [mediaInfo appendString:@")"];
        }

        /* print audio info */
        trackCount = audioTracks.count;

        if (trackCount > 0) {
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            if (mediaInfo.length > 0)
                [mediaInfo appendString:@"\n\n"];

            if (trackCount != 1)
                [mediaInfo appendFormat:@"%lu audio tracks", (unsigned long)trackCount];
            else
                [mediaInfo appendString:@"1 audio track"];

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            [mediaInfo appendString:@":\n"];
            for (NSUInteger x = 0; x < trackCount; x++) {
                NSManagedObject *track = audioTracks[x];
                int fourcc = [[track valueForKey:@"codec"] intValue];
                if (x != 0)
                    [mediaInfo appendFormat:@", %4.4s", (char *)&fourcc];
                else
                    [mediaInfo appendFormat:@"%4.4s", (char *)&fourcc];

                int channelNumber = [[track valueForKey:@"channelsNumber"] intValue];
                NSString *language = [track valueForKey:@"language"];
                int bitrate = [[track valueForKey:@"bitrate"] intValue];
                if (channelNumber != 0 || language != nil || bitrate > 0) {
                    [mediaInfo appendString:@" ["];

                    if (bitrate > 0)
                        [mediaInfo appendFormat:@"%i kbit/s", bitrate / 1024];

                    if (channelNumber > 0) {
                        if (bitrate > 0)
                            [mediaInfo appendString:@", "];

                        if (channelNumber == 1)
                            [mediaInfo appendString:@"MONO"];
                        else if (channelNumber == 2)
                            [mediaInfo appendString:@"STEREO"];
                        else
                            [mediaInfo appendString:@"MULTI-CHANNEL"];
                    }

                    if (language != nil) {
                        if (channelNumber > 0 || bitrate > 0)
                            [mediaInfo appendString:@", "];

                        [mediaInfo appendString:[language uppercaseString]];
                    }

                    [mediaInfo appendString:@"]"];
                }
            }
        }
        [mediaInfo appendString:@"\n\n"];

        /* SPU */
        trackCount = spuTracks.count;
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        if (trackCount == 0) {
            NSFileManager *fileManager = [NSFileManager defaultManager];
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            NSString *folderLocation = [theFile.url.path stringByDeletingLastPathComponent];
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            NSArray *allfiles = [fileManager contentsOfDirectoryAtPath:folderLocation error:nil];
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            NSString *fileName = [theFile.path.lastPathComponent stringByDeletingPathExtension];
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            NSUInteger count = allfiles.count;
            NSString *additionalFilePath;
            for (unsigned int x = 0; x < count; x++) {
                additionalFilePath = [NSString stringWithFormat:@"%@", allfiles[x]];
                if ([additionalFilePath isSupportedSubtitleFormat])
                    if ([additionalFilePath rangeOfString:fileName].location != NSNotFound)
                        trackCount ++;
            }
        }
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        if ((trackCount > 0) || (spuTracks.count > 0)) {
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            if (mediaInfo.length > 0)
                [mediaInfo appendString:@"\n\n"];

            if (trackCount != 1)
                [mediaInfo appendFormat:@"%lu subtitles tracks", (unsigned long)trackCount];
            else
                [mediaInfo appendString:@"1 subtitles track"];

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            if (spuTracks.count > 0) {
                [mediaInfo appendString:@" ("];
                for (NSUInteger x = 0; x < trackCount; x++) {
                    NSString *language = [spuTracks[x] valueForKey:@"language"];
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                    if (language) {
                        if (x != 0)
                            [mediaInfo appendFormat:@", %@", [language uppercaseString]];
                        else
                            [mediaInfo appendString:[language uppercaseString]];
                    }
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                }
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                [mediaInfo appendString:@")"];
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            }
        }

        self.metaDataLabel.text = mediaInfo;
        videoTracks = audioTracks = spuTracks = nil;
    }

    void (^animationBlock)() = ^() {
        self.metaDataLabel.hidden = !showMeta;
    };

    void (^completionBlock)(BOOL finished) = ^(BOOL finished) {
        self.metaDataLabel.hidden = !showMeta;
    };

    NSTimeInterval animationDuration = .2;
    [UIView animateWithDuration:animationDuration animations:animationBlock completion:completionBlock];
}

- (BOOL)showsMetaData
{
    return !self.metaDataLabel.hidden;
}

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- (void)thumbnailWasUpdated:(NSNotification *)aNotification
{
    self.thumbnailView.contentMode = UIViewContentModeScaleAspectFill;
    self.thumbnailView.image = [VLCThumbnailsCache thumbnailForManagedObject:self.mediaObject refreshCache:YES];
}

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- (void)prepareForReuse
{
    [super prepareForReuse];
    self.mediaObject = nil;
    self.thumbnailView.image = nil;
    self.titleLabel.text = @"";
    self.subtitleLabel.text = @"";
    self.mediaIsUnreadView.hidden = YES;
    self.progressView.hidden = YES;
    self.metaDataLabel.hidden = YES;
    self.folderIconView.hidden = YES;
    self.isSelectedView.hidden = YES;
    self.metaDataLabel.hidden = YES;
    self.mediaIsUnreadView.hidden = YES;
}
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@end