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<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
* The Image Class.
*
* @package automattic/jetpack
*/
/**
* Represents a resizable image, exposing properties necessary for properly generating srcset.
*/
class Jetpack_Photon_Image {
/**
* Attachment's Filename.
*
* @var string
*/
public $filename;
/**
* Attachment's mime-type, WP_Error on failure when recalculating the dimensions.
*
* @var string|WP_Error
*/
private $mime_type;
/**
* Image original width.
*
* @var int
*/
private $original_width;
/**
* Image original height.
*
* @var int
*/
private $original_height;
/**
* Current attachment's width.
*
* @var int
*/
private $width;
/**
* Current attachment's height.
*
* @var int
*/
private $height;
/**
* Whether the attachment has been resized yet, or not.
*
* @var bool
*/
private $is_resized = false;
/**
* Constructs the image object.
*
* The $data array should provide at least
* file : string Image file path
* width : int Image width
* height : int Image height
*
* @param array $data Array of attachment metadata, typically value of _wp_attachment_metadata postmeta.
* @param string|\WP_Error $mime_type Typically value returned from get_post_mime_type function.
*/
public function __construct( $data, $mime_type ) {
$this->filename = $data['file'];
$this->original_width = $data['width'];
$this->original_height = $data['height'];
$this->width = $this->original_width;
$this->height = $this->original_height;
$this->mime_type = $mime_type;
}
/**
* Resizes the image to given size.
*
* @param array $size_data Array of width, height, and crop properties of a size.
*
* @return bool|\WP_Error True if resize was successful, WP_Error on failure.
*/
public function resize( $size_data ) {
$dimensions = $this->image_resize_dimensions( $size_data['width'], $size_data['height'], $size_data['crop'] );
if ( true === is_wp_error( $dimensions ) ) {
return $dimensions; // Returns \WP_Error.
}
if ( true === is_wp_error( $this->mime_type ) ) {
return $this->mime_type; // Returns \WP_Error.
}
$this->set_width_height( $dimensions );
$this->is_resized = true;
return true;
}
/**
* Generates size data for usage in $metadata['sizes'];.
*
* @param array $size_data Array of width, height, and crop properties of a size.
*
* @return array|\WP_Error An array containing file, width, height, and mime-type keys and it's values. WP_Error on failure.
*/
public function get_size( $size_data ) {
$is_resized = $this->resize( $size_data );
if ( true === is_wp_error( $is_resized ) ) {
return $is_resized;
}
return array(
'file' => $this->get_filename(),
'width' => $this->get_width(),
'height' => $this->get_height(),
'mime-type' => $this->get_mime_type(),
);
}
/**
* Resets the image to it's original dimensions.
*
* @return bool True on successful reset to original dimensions.
*/
public function reset_to_original() {
$this->width = $this->original_width;
$this->height = $this->original_height;
$this->is_resized = false;
return true;
}
/**
* Return the basename filename. If the image has been resized, including
* the resizing params for Jetpack CDN.
*
* @return string Basename of the filename.
*/
public function get_filename() {
return wp_basename( $this->get_raw_filename() );
}
/**
* Return the absolute filename. If the image has been resized, including
* the resizing params for Jetpack CDN.
*
* @return string Filename.
*/
public function get_raw_filename() {
return $this->is_resized() ? $this->get_resized_filename() : $this->filename;
}
/**
* Returns current image width. Either original, or after resize.
*
* @return int
*/
public function get_width() {
return (int) $this->width;
}
/**
* Returns current image height. Either original, or after resize.
*
* @return int
*/
public function get_height() {
return (int) $this->height;
}
/**
* Returns image mime type.
*
* @return string|WP_Error Image's mime type or WP_Error if it was not determined.
*/
public function get_mime_type() {
return $this->mime_type;
}
/**
* Checks the resize status of the image.
*
* @return bool If the image has been resized.
*/
public function is_resized() {
return ( true === $this->is_resized );
}
/**
* Get filename with proper args for the Photon service.
*
* @return string Filename with query args for Photon service
*/
protected function get_resized_filename() {
$query_args = array(
'resize' => join(
',',
array(
$this->get_width(),
$this->get_height(),
)
),
);
return add_query_arg( $query_args, $this->filename );
}
/**
* Get resize dimensions used for the Jetpack CDN service.
*
* Converts the list of values returned from `image_resize_dimensions()` to
* associative array for the sake of more readable code no relying on index
* nor `list`.
*
* @param int $max_width Maximum width.
* @param int $max_height Maximum height.
* @param bool|array $crop Cropping parameters.
*
* @return array|\WP_Error Array of dimensions matching the parameters to imagecopyresampled. WP_Error on failure.
*/
protected function image_resize_dimensions( $max_width, $max_height, $crop ) {
$dimensions = image_resize_dimensions( $this->original_width, $this->original_height, $max_width, $max_height, $crop );
if ( ! $dimensions ) {
return new WP_Error( 'error_getting_dimensions', __( 'Could not calculate resized image dimensions', 'jetpack' ), $this->filename );
}
return array_combine(
array(
'dst_x',
'dst_y',
'src_x',
'src_y',
'dst_w',
'dst_h',
'src_w',
'src_h',
),
$dimensions
);
}
/**
* Sets proper width and height from dimensions.
*
* @param array $dimensions an array of image dimensions.
* @return void
*/
protected function set_width_height( $dimensions ) {
$this->width = (int) $dimensions['dst_w'];
$this->height = (int) $dimensions['dst_h'];
}
}