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Editing: class-gf-block.php

<?php

// If Gravity Forms Block Manager is not available, do not run.
if ( ! class_exists( 'GF_Blocks' ) || ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Base Gravity Forms Block class.
 *
 * @since 2.4.10
 *
 * Class GF_Block
 */
class GF_Block {

/**
	 * Contains an instance of this block, if available.
	 *
	 * @since  2.4.10
	 * @var    GF_Block $_instance If available, contains an instance of this block.
	 */
	private static $_instance = null;

/**
	 * Block type.
	 *
	 * @since 2.4.10
	 * @var   string
	 */
	public $type = '';

/**
	 * Handle of primary block script.
	 *
	 * @since 2.4.10
	 * @var   string
	 */
	public $script_handle = '';

/**
	 * Block attributes.
	 *
	 * @since 2.4.10
	 * @var   array
	 */
	public $attributes = array();

/**
	 * Register block type.
	 * Enqueue editor assets.
	 *
	 * @since  2.4.10
	 *
	 * @uses   GF_Block::register_block_type()
	 */
	public function init() {

$this->register_block_type();

add_filter( 'allowed_block_types', array( $this, 'check_allowed_blocks' ), 9999 );

add_action( 'gform_post_enqueue_scripts', array( $this, 'post_enqueue_scripts' ), 10, 3 );

}

// # BLOCK REGISTRATION --------------------------------------------------------------------------------------------

/**
	 * Get block type.
	 *
	 * @since  2.4.10
	 *
	 * @return string
	 */
	public function get_type() {

return $this->type;

}

/**
	 * Register block with WordPress.
	 *
	 * @since  2.4.10
	 */
	public function register_block_type() {

register_block_type( $this->get_type(), array(
			'render_callback' => array( $this, 'render_block' ),
			'editor_script'   => $this->script_handle,
			'attributes'      => $this->attributes,
		) );

}

/**
	 * Checks allowed blocks for Gravity forms blocks to only enqueue block editor assets when necessary.
	 *
	 * @since  2.4.18
	 *
	 * @param bool|array $allowed_block_types Array of block type slugs, or boolean to enable/disable all.
	 *
	 * @return bool|array
	 */
	public function check_allowed_blocks( $allowed_block_types ) {

// Only enqueue block editor assets if all blocks are allowed or if the current block type is an allowed block.
		if ( $allowed_block_types === true || ( is_array( $allowed_block_types ) && in_array( $this->get_type(), $allowed_block_types ) ) ) {
			add_action( 'enqueue_block_editor_assets', array( $this, 'enqueue_scripts' ) );
			add_action( 'enqueue_block_editor_assets', array( $this, 'enqueue_styles' ) );
		}

return $allowed_block_types;
	}

// # SCRIPT ENQUEUEING ---------------------------------------------------------------------------------------------

/**
	 * Enqueue block scripts.
	 *
	 * @since  2.4.10
	 *
	 * @uses   GF_Block::scripts()
	 */
	public function enqueue_scripts() {

// Get registered scripts.
		$scripts = $this->scripts();

// If no scripts are registered, return.
		if ( empty( $scripts ) ) {
			return;
		}

// Loop through scripts.
		foreach ( $scripts as $script ) {

// Prepare parameters.
			$src       = isset( $script['src'] ) ? $script['src'] : false;
			$deps      = isset( $script['deps'] ) ? $script['deps'] : array();
			$version   = isset( $script['version'] ) ? $script['version'] : false;
			$in_footer = isset( $script['in_footer'] ) ? $script['in_footer'] : false;

// Enqueue script.
			wp_enqueue_script( $script['handle'], $src, $deps, $version, $in_footer );

// Localize script.
			if ( rgar( $script, 'strings' ) ) {
				wp_localize_script( $script['handle'], $script['handle'] . '_strings', $script['strings'] );
			}

// Run script callback.
			if ( rgar( $script, 'callback' ) && is_callable( $script['callback'] ) ) {
				call_user_func( $script['callback'], $script );
			}

}

/**
	 * Override this function to provide a list of scripts to be enqueued.
	 * Following is an example of the array that is expected to be returned by this function:
	 * <pre>
	 * <code>
	 *
	 *    array(
	 *        array(
	 *            'handle'   => 'super_signature_script',
	 *            'src'      => $this->get_base_url() . '/super_signature/ss.js',
	 *            'version'  => $this->_version,
	 *            'deps'     => array( 'jquery'),
	 *            'callback' => array( $this, 'localize_scripts' ),
	 *            'strings'  => array(
	 *                // Accessible in JavaScript using the global variable "[script handle]_strings"
	 *                'stringKey1' => __( 'The string', 'gravityforms' ),
	 *                'stringKey2' => __( 'Another string.', 'gravityforms' )
	 *            )
	 *        )
	 *    );
	 *
	 * </code>
	 * </pre>
	 *
	 * @since  2.4.10
	 *
	 * @return array
	 */
	public function scripts() {

return array();

}

// # STYLE ENQUEUEING ----------------------------------------------------------------------------------------------

/**
	 * Enqueue block styles.
	 *
	 * @since  2.4.10
	 */
	public function enqueue_styles() {

// Get registered styles.
		$styles = $this->styles();

// If no styles are registered, return.
		if ( empty( $styles ) ) {
			return;
		}

// Loop through styles.
		foreach ( $styles as $style ) {

// Prepare parameters.
			$src     = isset( $style['src'] ) ? $style['src'] : false;
			$deps    = isset( $style['deps'] ) ? $style['deps'] : array();
			$version = isset( $style['version'] ) ? $style['version'] : false;
			$media   = isset( $style['media'] ) ? $style['media'] : 'all';

// Enqueue style.
			wp_enqueue_style( $style['handle'], $src, $deps, $version, $media );

}

/**
	 * Override this function to provide a list of styles to be enqueued.
	 * See scripts() for an example of the format expected to be returned.
	 *
	 * @since  2.4.10
	 *
	 * @return array
	 */
	public function styles() {

return array();

}

// # BLOCK RENDER -------------------------------------------------------------------------------------------------

/**
	 * Display block contents on frontend.
	 *
	 * @since  2.4.10
	 *
	 * @param array $attributes Block attributes.
	 *
	 * @return string
	 */
	public function render_block( $attributes = array() ) {

return '';

}

/**
	 * Override to perform additional actions when scripts/styles are enqueued on the wp_enqueue_scripts hook.
	 *
	 * @since 2.4.18
	 *
	 * @param array   $found_forms  An array of found forms using the form ID as the key to the ajax status.
	 * @param array   $found_blocks An array of found GF blocks.
	 * @param WP_Post $post         The post which was processed.
	 */
	public function post_enqueue_scripts( $found_forms, $found_blocks, $post ) {
	}

}

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