<?php
/**
 * Image control class.  This control allows users to set an image.  It passes the attachment
 * ID the setting, so you'll need a custom control class if you want to store anything else,
 * such as the URL or other data.
 *
 * @package    ButterBean
 * @author     Justin Tadlock <justin@justintadlock.com>
 * @copyright  Copyright (c) 2015-2016, Justin Tadlock
 * @link       https://github.com/justintadlock/butterbean
 * @license    http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 */

/**
 * Image control class.
 *
 * @since  1.0.0
 * @access public
 */
class ButterBean_Control_Image extends ButterBean_Control {

	/**
	 * The type of control.
	 *
	 * @since  1.0.0
	 * @access public
	 * @var    string
	 */
	public $type = 'image';

	/**
	 * Array of text labels to use for the media upload frame.
	 *
	 * @since  1.0.0
	 * @access public
	 * @var    string
	 */
	public $l10n = array();

	/**
	 * Image size to display.  If the size isn't found for the image,
	 * the full size of the image will be output.
	 *
	 * @since  1.0.0
	 * @access public
	 * @var    string
	 */
	public $size = 'large';

	/**
	 * Creates a new control object.
	 *
	 * @since  1.0.0
	 * @access public
	 * @param  object  $manager
	 * @param  string  $name
	 * @param  array   $args
	 * @return void
	 */
	public function __construct( $manager, $name, $args = array() ) {
		parent::__construct( $manager, $name, $args );

		$this->l10n = wp_parse_args(
			$this->l10n,
			array(
				'upload'      => esc_html__( 'Add image',         'butterbean' ),
				'set'         => esc_html__( 'Set as image',      'butterbean' ),
				'choose'      => esc_html__( 'Choose image',      'butterbean' ),
				'change'      => esc_html__( 'Change image',      'butterbean' ),
				'remove'      => esc_html__( 'Remove image',      'butterbean' ),
				'placeholder' => esc_html__( 'No image selected', 'butterbean' )
			)
		);
	}

	/**
	 * Enqueue scripts/styles for the control.
	 *
	 * @since  1.0.0
	 * @access public
	 * @return void
	 */
	public function enqueue() {

		wp_enqueue_media();
	}

	/**
	 * Adds custom data to the json array.
	 *
	 * @since  1.0.0
	 * @access public
	 * @return void
	 */
	public function to_json() {
		parent::to_json();

		$this->json['l10n'] = $this->l10n;
		$this->json['size'] = $this->size;

		$value = $this->get_value();
		$image = $alt = '';

		if ( $value ) {
			$image = wp_get_attachment_image_src( absint( $value ), $this->size );
			$alt   = get_post_meta( absint( $value ), '_wp_attachment_image_alt', true );
		}

		$this->json['src'] = $image ? esc_url( $image[0] ) : '';
		$this->json['alt'] = $alt   ? esc_attr( $alt )     : '';
	}
}
