Weak hands cannot be planted, meager skills have no foundation. Shallow wisdom is futile, how can one hope for a good name?扰扰从役倦，屑屑身事微。少壮轻年月，迟暮惜光辉。
image = $image;
$this->url = $url;
}
/**
* Adds an image to the list by image ID.
*
* @param int $image_id The image ID to add.
*
* @return void
*/
public function add_image_by_id( $image_id ) {
$image = $this->image->get_attachment_image_source( $image_id, $this->image_size );
if ( $image ) {
$this->add_image( $image );
}
}
/**
* Adds an image to the list by image ID.
*
* @param string $image_meta JSON encoded image meta.
*
* @return void
*/
public function add_image_by_meta( $image_meta ) {
$this->add_image( (array) \json_decode( $image_meta ) );
}
/**
* Return the images array.
*
* @return array The images.
*/
public function get_images() {
return $this->images;
}
/**
* Check whether we have images or not.
*
* @return bool True if we have images, false if we don't.
*/
public function has_images() {
return ! empty( $this->images );
}
/**
* Adds an image based on a given URL.
*
* @param string $url The given URL.
*
* @return number|null Returns the found image ID if it exists. Otherwise -1.
* If the URL is empty we return null.
*/
public function add_image_by_url( $url ) {
if ( empty( $url ) ) {
return null;
}
$image_id = $this->image->get_attachment_by_url( $url );
if ( $image_id ) {
$this->add_image_by_id( $image_id );
return $image_id;
}
$this->add_image( $url );
return -1;
}
/**
* Adds an image