<?php
/**
 * class-affiliates-dashboard-block.php
 *
 * Copyright (c) 2010 - 2018 "kento" Karim Rahimpur www.itthinx.com
 *
 * This code is released under the GNU General Public License.
 * See COPYRIGHT.txt and LICENSE.txt.
 *
 * This code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * This header and all notices must be kept intact.
 *
 * @author Karim Rahimpur
 * @package affiliates
 * @since affiliates 4.0.0
 */

if ( !defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Dashboard block.
 */
class Affiliates_Dashboard_Block extends Affiliates_Dashboard {

	/**
	 * Adds our init action.
	 */
	public static function init() {
		add_action( 'init', array( __CLASS__, 'wp_init' ) );
		add_filter( 'block_categories', array( __CLASS__, 'block_categories' ), 10, 2 );
		add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'enqueue_block_editor_assets' ) );
		add_action( 'enqueue_block_assets', array( __CLASS__, 'enqueue_block_assets' ) );
	}

	/**
	 * Registers our block category.
	 *
	 * @param array $categories Array of block categories.
	 * @param WP_Post $post               Post being loaded.
	 *
	 * @return array
	 */
	public static function block_categories( $categories, $post ) {
		$categories = array_merge(
			$categories,
			array( array(
				'slug'  => 'affiliates',
				'title' => 'Affiliates', // don't translate
				'icon'  => 'performance'
			) )
		);
		return $categories;
	}

	public static function enqueue_block_editor_assets() {
		// Our script used to edit and render the blocks.
		wp_register_script(
			'affiliates-dashboard-block',
			plugins_url( 'js/dashboard-block.js', AFFILIATES_FILE ),
			array( 'wp-blocks', 'wp-element' )
		);

		wp_localize_script(
			'affiliates-dashboard-block',
			'affiliates_dashboard_block',
			array(
				'title'              => _x( 'Affiliates Dashboard', 'block title', 'affiliates' ),
				'description'        => _x( 'Displays the complete Affiliates Dashboard with its sections', 'block description', 'affiliates' ),
				'keyword_affiliates' => __( 'Affiliates', 'affiliates' ),
				'keyword_dashboard'  => __( 'Dashboard', 'affiliates' ),
				'dashboard_notice'   => _x( 'Affiliates Dashboard', 'Notice shown when editing the Affiliates Dashboard Profile block as a non-affiliate.', 'affiliates' ),
				'affiliates_icon'    => AFFILIATES_PLUGIN_URL . '/images/affiliates-32.png'
			)
		);

		// Our editor stylesheet - not required yet.
		// wp_register_style(
		//	'affiliates-dashboard-block-editor',
		//	plugins_url( 'css/dashboard-blocks-editor.css', AFFILIATES_FILE ),
		//	array( 'wp-edit-blocks' ),
		//	AFFILIATES_CORE_VERSION
		// );
	}

	public static function enqueue_block_assets() {
		// Our front end stylesheet - not required yet.
		// wp_register_style(
		//	'affiliates-dashboard-block',
		//	plugins_url( 'css/dashboard-blocks.css', AFFILIATES_FILE ),
		//	array(),
		//	AFFILIATES_CORE_VERSION
		// );
	}

	/**
	 * Initialization - registers the block.
	 */
	public static function wp_init() {
		if ( function_exists( 'register_block_type' ) ) {
			register_block_type(
				'affiliates/dashboard',
				array(
					'editor_script' => 'affiliates-dashboard-block',
					'render_callback' => array( __CLASS__, 'block' )
				)
			);
		}
	}

	/**
	 * Callback that renders the dashboard block.
	 *
	 * @param array $atts attributes
	 * @param string $content not used
	 *
	 * @return string
	 */
	public static function block( $atts, $content = '' ) {

		// Render the dashboard:
		$dashboard = Affiliates_Dashboard_Factory::get_dashboard_instance();
		ob_start();
		$dashboard->render();
		$output = ob_get_clean();

		// The following fixes a Gutenberg UX/UI bug : if the callback returns an empty string, you would see a spinner that never goes away.
		// So we render something other than the empty string, to avoid the spinner being shown eternally.
		// The form obviously won't be rendered when previewing in the editor because you're logged in.
		// The REST_REQUEST ... part is trying to recognize it's a request to render the block on the back end.
		if (
			( strlen( $output ) === 0 ) &&
			defined( 'REST_REQUEST' ) && REST_REQUEST && isset( $_REQUEST['context'] ) && $_REQUEST['context'] === 'edit'
		) {
			$output .= '<div style="display:none"></div>';
		}
		return $output;
	}

}
Affiliates_Dashboard_Block::init();