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<?php
/**
* Media metadata class. This class is for getting and formatting attachment media file metadata. This
* is for metadata about the actual file and not necessarily any post metadata. Currently, only
* image, audio, and video files are handled.
*
* Theme authors need not access this class directly. Instead, utilize the template tags in the
* `/inc/template-media.php` file.
*
* @package Hybrid
* @subpackage Includes
* @author Justin Tadlock <justin@justintadlock.com>
* @copyright Copyright (c) 2008 - 2015, Justin Tadlock
* @link http://themehybrid.com/hybrid-core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*/
/**
* Gets attachment media file metadata. Each piece of meta will be escaped and formatted when
* returned so that theme authors can properly utilize it within their themes.
*
* Theme authors shouldn't access this class directly. Instead, utilize the `hybrid_media_meta()`
* and `hybrid_get_media_meta()` functions.
*
* @since 3.0.0
* @access public
*/
class Hybrid_Media_Meta {
/**
* Arguments passed in.
*
* @since 3.0.0
* @access protected
* @var array
*/
protected $post_id = 0;
/**
* Metadata from the wp_get_attachment_metadata() function.
*
* @since 3.0.0
* @access protected
* @var array
*/
protected $meta = array();
/**
* Type of media for the current attachment.
*
* @since 3.0.0
* @access protected
* @var string image|audio|video
*/
protected $type = '';
/**
* Allowed media types.
*
* @since 3.0.0
* @access public
* @var array
*/
protected $allowed_types = array( 'image', 'audio', 'video' );
/* ====== Magic Methods ====== */
/**
* Sets up and runs the functionality for getting the attachment meta.
*
* @since 3.0.0
* @access public
* @param array $args
* @return void
*/
public function __construct( $post_id ) {
$this->post_id = $post_id;
$this->meta = wp_get_attachment_metadata( $this->post_id );
$this->type = hybrid_get_attachment_type( $this->post_id );
// If we have a type that's in the whitelist, run filters.
if ( $this->type && in_array( $this->type, $this->allowed_types ) ) {
// Run common media filters for any media type.
$this->media_filters();
// Run type-specific filters.
call_user_func( array( $this, "{$this->type}_filters" ) );
}
}
/**
* Magic method for getting media object properties. Let's keep from failing if a theme
* author attempts to access a property that doesn't exist.
*
* @since 3.0.0
* @access public
* @param string $property
* @return mixed
*/
public function __get( $property ) {
return isset( $this->property ) ? $this->property : $this->get( $property );
}
/* ====== Protected Methods ====== */
/**
* Function for escaping properties when there is not a specific method for handling them
* within the class.
*
* @since 3.0.0
* @access protected
* @param string|int $value
* @param string $property
* @return string|int
*/
protected function escape( $value, $property ) {
if ( has_filter( "hybrid_media_meta_escape_{$property}" ) )
return apply_filters( "hybrid_media_meta_escape_{$property}", $value, $this->type );
return is_numeric( $value ) ? intval( $value ) : esc_html( $value );
}
/**
* Adds filters for common media meta.
*
* Properties: file_name, filesize, file_type, mime_type
*
* @since 3.0.0
* @access protected
* @return void
*/
protected function media_filters() {
add_filter( 'hybrid_media_meta_escape_file_name', array( $this, 'file_name' ), 5 );
add_filter( 'hybrid_media_meta_escape_filesize', array( $this, 'file_size' ), 5 );
add_filter( 'hybrid_media_meta_escape_file_size', array( $this, 'file_size' ), 5 ); // alias for filesize
add_filter( 'hybrid_media_meta_escape_file_type', array( $this, 'file_type' ), 5 );
add_filter( 'hybrid_media_meta_escape_mime_type', array( $this, 'mime_type' ), 5 );
}
/**
* Adds filters for image meta.
*
* Properties: aperture, camera, caption, copyright, credit, created_timestamp, dimensions,
* focal_length, iso, shutter_speed
*
* @since 3.0.0
* @access protected
* @return void
*/
protected function image_filters() {
add_filter( 'hybrid_media_meta_escape_dimensions', array( $this, 'dimensions' ), 5 );
add_filter( 'hybrid_media_meta_escape_created_timestamp', array( $this, 'created_timestamp' ), 5 );
add_filter( 'hybrid_media_meta_escape_aperture', array( $this, 'aperture' ), 5 );
add_filter( 'hybrid_media_meta_escape_shutter_speed', array( $this, 'shutter_speed' ), 5 );
add_filter( 'hybrid_media_meta_escape_focal_length', 'absint', 5 );
add_filter( 'hybrid_media_meta_escape_iso', 'absint', 5 );
}
/**
* Adds filters for audio meta.
*
* Properties: album, artist, composer, genre, length_formatted, lyrics, track_number, year
*
* @since 3.0.0
* @access protected
* @return void
*/
protected function audio_filters() {
add_filter( 'hybrid_media_meta_escape_track_number', 'absint', 5 );
add_filter( 'hybrid_media_meta_escape_year', 'absint', 5 );
// Filters for the audio transcript.
add_filter( 'hybrid_media_meta_escape_lyrics', array( $this, 'lyrics' ), 5 );
add_filter( 'hybrid_media_meta_escape_lyrics', 'wptexturize', 10 );
add_filter( 'hybrid_media_meta_escape_lyrics', 'convert_chars', 15 );
add_filter( 'hybrid_media_meta_escape_lyrics', 'wpautop', 20 );
}
/**
* Adds filters for video meta.
*
* Properties: dimensions, length-formatted
*
* @since 3.0.0
* @access protected
* @return void
*/
protected function video_filters() {
add_filter( 'hybrid_media_meta_escape_dimensions', array( $this, 'dimensions' ), 5 );
}
/* ====== Public Methods ====== */
/**
* Method for grabbing meta formatted metadata by key.
*
* @since 3.0.0
* @access public
* @param string $property
* @return mixed
*/
public function get( $property ) {
$value = null;
// If the property exists in the meta array.
if ( isset( $this->meta[ $property ] ) )
$value = $this->meta[ $property ];
// If the property exists in the image meta array.
elseif ( 'image' === $this->type && isset( $this->meta['image_meta'][ $property ] ) )
$value = $this->meta['image_meta'][ $property ];
// If the property exists in the video's audio meta array.
elseif ( 'video' === $this->type && isset( $this->meta['audio'][ $property ] ) )
$value = $this->meta['audio'][ $property ];
// Escape and return.
return $this->escape( $value, $property );
}
/**
* Image/Video meta. Media width + height dimensions.
*
* @since 3.0.0
* @access public
* @param string $dimensions
* @return string
*/
public function dimensions( $dimensions ) {
// If there's a width and height.
if ( ! empty( $this->meta['width'] ) && ! empty( $this->meta['height'] ) ) {
$dimensions = sprintf(
// Translators: Media dimensions - 1 is width and 2 is height.
esc_html__( '%1$s × %2$s', 'hybrid-core' ),
number_format_i18n( absint( $this->meta['width'] ) ),
number_format_i18n( absint( $this->meta['height'] ) )
);
}
return $dimensions;
}
/**
* Image meta. Date the image was created.
*
* @since 3.0.0
* @access public
* @param string $timestamp
* @return string
*/
public function created_timestamp( $timestamp ) {
if ( ! empty( $this->meta['image_meta']['created_timestamp'] ) ) {
$timestamp = date_i18n(
get_option( 'date_format' ),
strip_tags( $this->meta['image_meta']['created_timestamp'] )
);
}
return $timestamp;
}
/**
* Image meta. Camera aperture in the form of `f/{$aperture}`.
*
* @since 3.0.0
* @access public
* @param string $aperture
* @return string
*/
public function aperture( $aperture ) {
if ( !empty( $this->meta['image_meta']['aperture'] ) )
$aperture = sprintf( '<sup>f</sup>⁄<sub>%s</sub>', absint( $this->meta['image_meta']['aperture'] ) );
return $aperture;
}
/**
* Image meta. Camera shutter speed in seconds (i18n number format).
*
* @since 3.0.0
* @access public
* @param string $shutter
* @return string
*/
public function shutter_speed( $shutter ) {
// If a shutter speed is given, format the float into a fraction.
if ( ! empty( $this->meta['image_meta']['shutter_speed'] ) ) {
$shutter = $speed = floatval( strip_tags( $this->meta['image_meta']['shutter_speed'] ) );
if ( ( 1 / $speed ) > 1 ) {
$shutter = sprintf( '<sup>%s</sup>⁄', number_format_i18n( 1 ) );
if ( number_format( ( 1 / $speed ), 1 ) == number_format( ( 1 / $speed ), 0 ) )
$shutter .= sprintf( '<sub>%s</sub>', number_format_i18n( ( 1 / $speed ), 0, '.', '' ) );
else
$shutter .= sprintf( '<sub>%s</sub>', number_format_i18n( ( 1 / $speed ), 1, '.', '' ) );
}
}
return $shutter;
}
/**
* Audio meta. Lyrics/transcript for an audio file.
*
* @since 3.0.0
* @access public
* @return void
*/
public function lyrics( $lyrics ) {
// Look for the 'unsynchronised_lyric' tag.
if ( isset( $this->meta['unsynchronised_lyric'] ) )
$lyrics = $this->meta['unsynchronised_lyric'];
// Seen this misspelling of the id3 tag.
elseif ( isset( $this->meta['unsychronised_lyric'] ) )
$lyrics = $this->meta['unsychronised_lyric'];
return strip_tags( $lyrics );
}
/**
* Name of the file linked to the permalink for the file.
*
* @since 3.0.0
* @access public
* @return string
*/
public function file_name() {
return sprintf(
'<a href="%s">%s</a>',
esc_url( wp_get_attachment_url( $this->post_id ) ),
basename( get_attached_file( $this->post_id ) )
);
}
/**
* Audio/Video meta. Size of the file.
*
* @since 3.0.0
* @access public
* @param int $file_size
* @return int
*/
public function file_size( $file_size ) {
return ! empty( $this->meta['filesize'] ) ? size_format( strip_tags( $this->meta['filesize'] ), 2 ) : $file_size;
}
/**
* Type of file.
*
* @since 3.0.0
* @access public
* @param string $file_type
* @return string
*/
public function file_type( $file_type ) {
if ( preg_match( '/^.*?\.(\w+)$/', get_attached_file( $this->post_id ), $matches ) )
$file_type = esc_html( strtoupper( $matches[1] ) );
return $file_type;
}
/**
* Mime type for the file.
*
* @since 3.0.0
* @access public
* @param string $mime_type
* @return string
*/
public function mime_type( $mime_type ) {
$mime_type = get_post_mime_type( $this->post_id );
if ( empty( $mime_type ) && ! empty( $this->meta['mime_type'] ) )
$mime_type = $this->meta['mime_type'];
return esc_html( $mime_type );
}
}