<?php

/**

 * Dependencies API: WP_Scripts class

 *

 * @since 2.6.0

 *

 * @package WordPress

 * @subpackage Dependencies

 */

/**

 * Core class used to register scripts.

 *

 * @since 2.1.0

 *

 * @see WP_Dependencies

 */

class WP_Scripts extends WP_Dependencies {

	/**

	 * Base URL for scripts.

	 *

	 * Full URL with trailing slash.

	 *

	 * @since 2.6.0

	 * @var string

	 */

	public $base_url;

	/**

	 * URL of the content directory.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	public $content_url;

	/**

	 * Default version string for scripts.

	 *

	 * @since 2.6.0

	 * @var string

	 */

	public $default_version;

	/**

	 * Holds handles of scripts which are enqueued in footer.

	 *

	 * @since 2.8.0

	 * @var array

	 */

	public $in_footer = array();

	/**

	 * Holds a list of script handles which will be concatenated.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	public $concat = '';

	/**

	 * Holds a string which contains script handles and their version.

	 *

	 * @since 2.8.0

	 * @deprecated 3.4.0

	 * @var string

	 */

	public $concat_version = '';

	/**

	 * Whether to perform concatenation.

	 *

	 * @since 2.8.0

	 * @var bool

	 */

	public $do_concat = false;

	/**

	 * Holds HTML markup of scripts and additional data if concatenation

	 * is enabled.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	public $print_html = '';

	/**

	 * Holds inline code if concatenation is enabled.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	public $print_code = '';

	/**

	 * Holds a list of script handles which are not in the default directory

	 * if concatenation is enabled.

	 *

	 * Unused in core.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	public $ext_handles = '';

	/**

	 * Holds a string which contains handles and versions of scripts which

	 * are not in the default directory if concatenation is enabled.

	 *

	 * Unused in core.

	 *

	 * @since 2.8.0

	 * @var string

	 */

	public $ext_version = '';

	/**

	 * List of default directories.

	 *

	 * @since 2.8.0

	 * @var array

	 */

	public $default_dirs;

	/**

	 * Holds a string which contains the type attribute for script tag.

	 *

	 * If the current theme does not declare HTML5 support for 'script',

	 * then it initializes as `type='text/javascript'`.

	 *

	 * @since 5.3.0

	 * @var string

	 */

	private $type_attr = '';

	/**

	 * Constructor.

	 *

	 * @since 2.6.0

	 */

	public function __construct() {

		$this->init();

		add_action( 'init', array( $this, 'init' ), 0 );

	}

	/**

	 * Initialize the class.

	 *

	 * @since 3.4.0

	 */

	public function init() {

		if (

			function_exists( 'is_admin' ) && ! is_admin()

		&&

			function_exists( 'current_theme_supports' ) && ! current_theme_supports( 'html5', 'script' )

		) {

			$this->type_attr = " type='text/javascript'";

		}

		/**

		 * Fires when the WP_Scripts instance is initialized.

		 *

		 * @since 2.6.0

		 *

		 * @param WP_Scripts $this WP_Scripts instance (passed by reference).

		 */

		do_action_ref_array( 'wp_default_scripts', array( &$this ) );

	}

	/**

	 * Prints scripts.

	 *

	 * Prints the scripts passed to it or the print queue. Also prints all necessary dependencies.

	 *

	 * @since 2.1.0

	 * @since 2.8.0 Added the `$group` parameter.

	 *

	 * @param string|string[]|false $handles Optional. Scripts to be printed: queue (false),

	 *                                       single script (string), or multiple scripts (array of strings).

	 *                                       Default false.

	 * @param int|false             $group   Optional. Group level: level (int), no groups (false).

	 *                                       Default false.

	 * @return string[] Handles of scripts that have been printed.

	 */

	public function print_scripts( $handles = false, $group = false ) {

		return $this->do_items( $handles, $group );

	}

	/**

	 * Prints extra scripts of a registered script.

	 *

	 * @since 2.1.0

	 * @since 2.8.0 Added the `$echo` parameter.

	 * @deprecated 3.3.0

	 *

	 * @see print_extra_script()

	 *

	 * @param string $handle The script's registered handle.

	 * @param bool   $echo   Optional. Whether to echo the extra script

	 *                       instead of just returning it. Default true.

	 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true,

	 *                          true otherwise.

	 */

	public function print_scripts_l10n( $handle, $echo = true ) {

		_deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' );

		return $this->print_extra_script( $handle, $echo );

	}

	/**

	 * Prints extra scripts of a registered script.

	 *

	 * @since 3.3.0

	 *

	 * @param string $handle The script's registered handle.

	 * @param bool   $echo   Optional. Whether to echo the extra script

	 *                       instead of just returning it. Default true.

	 * @return bool|string|void Void if no data exists, extra scripts if `$echo` is true,

	 *                          true otherwise.

	 */

	public function print_extra_script( $handle, $echo = true ) {

		$output = $this->get_data( $handle, 'data' );

		if ( ! $output ) {

			return;

		}

		if ( ! $echo ) {

			return $output;

		}

		printf( "<script%s id='%s-js-extra'>\n", $this->type_attr, esc_attr( $handle ) );

		// CDATA is not needed for HTML 5.

		if ( $this->type_attr ) {

			echo "/* <![CDATA[ */\n";

		}

		echo "$output\n";

		if ( $this->type_attr ) {

			echo "/* ]]> */\n";

		}

		echo "</script>\n";

		return true;

	}

	/**

	 * Processes a script dependency.

	 *

	 * @since 2.6.0

	 * @since 2.8.0 Added the `$group` parameter.

	 *

	 * @see WP_Dependencies::do_item()

	 *

	 * @param string    $handle The script's registered handle.

	 * @param int|false $group  Optional. Group level: level (int), no groups (false).

	 *                          Default false.

	 * @return bool True on success, false on failure.

	 */

	public function do_item( $handle, $group = false ) {

		if ( ! parent::do_item( $handle ) ) {

			return false;

		}

		if ( 0 === $group && $this->groups[ $handle ] > 0 ) {

			$this->in_footer[] = $handle;

			return false;

		}

		if ( false === $group && in_array( $handle, $this->in_footer, true ) ) {

			$this->in_footer = array_diff( $this->in_footer, (array) $handle );

		}

		$obj = $this->registered[ $handle ];

		if ( null === $obj->ver ) {

			$ver = '';

		} else {

			$ver = $obj->ver ? $obj->ver : $this->default_version;

		}

		if ( isset( $this->args[ $handle ] ) ) {

			$ver = $ver ? $ver . '&' . $this->args[ $handle ] : $this->args[ $handle ];

		}

		$src         = $obj->src;

		$cond_before = '';

		$cond_after  = '';

		$conditional = isset( $obj->extra['conditional'] ) ? $obj->extra['conditional'] : '';

		if ( $conditional ) {

			$cond_before = "<!--[if {$conditional}]>\n";

			$cond_after  = "<![endif]-->\n";

		}

		$before_handle = $this->print_inline_script( $handle, 'before', false );

		$after_handle  = $this->print_inline_script( $handle, 'after', false );

		if ( $before_handle ) {

			$before_handle = sprintf( "<script%s id='%s-js-before'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $before_handle );

		}

		if ( $after_handle ) {

			$after_handle = sprintf( "<script%s id='%s-js-after'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $after_handle );

		}

		if ( $before_handle || $after_handle ) {

			$inline_script_tag = $cond_before . $before_handle . $after_handle . $cond_after;

		} else {

			$inline_script_tag = '';

		}

		$translations = $this->print_translations( $handle, false );

		if ( $translations ) {

			$translations = sprintf( "<script%s id='%s-js-translations'>\n%s\n</script>\n", $this->type_attr, esc_attr( $handle ), $translations );

		}

		if ( $this->do_concat ) {

			/**

			 * Filters the script loader source.

			 *

			 * @since 2.2.0

			 *

			 * @param string $src    Script loader source path.

			 * @param string $handle Script handle.

			 */

			$srce = apply_filters( 'script_loader_src', $src, $handle );

			if ( $this->in_default_dir( $srce ) && ( $before_handle || $after_handle || $translations ) ) {

				$this->do_concat = false;

				// Have to print the so-far concatenated scripts right away to maintain the right order.

				_print_scripts();

				$this->reset();

			} elseif ( $this->in_default_dir( $srce ) && ! $conditional ) {

				$this->print_code     .= $this->print_extra_script( $handle, false );

				$this->concat         .= "$handle,";

				$this->concat_version .= "$handle$ver";

				return true;

			} else {

				$this->ext_handles .= "$handle,";

				$this->ext_version .= "$handle$ver";

			}

		}

		$has_conditional_data = $conditional && $this->get_data( $handle, 'data' );

		if ( $has_conditional_data ) {

			echo $cond_before;

		}

		$this->print_extra_script( $handle );

		if ( $has_conditional_data ) {

			echo $cond_after;

		}

		// A single item may alias a set of items, by having dependencies, but no source.

		if ( ! $src ) {

			if ( $inline_script_tag ) {

				if ( $this->do_concat ) {

					$this->print_html .= $inline_script_tag;

				} else {

					echo $inline_script_tag;

				}

			}

			return true;

		}

		if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && 0 === strpos( $src, $this->content_url ) ) ) {

			$src = $this->base_url . $src;

		}

		if ( ! empty( $ver ) ) {

			$src = add_query_arg( 'ver', $ver, $src );

		}

		/** This filter is documented in wp-includes/class.wp-scripts.php */

		$src = esc_url( apply_filters( 'script_loader_src', $src, $handle ) );

		if ( ! $src ) {

			return true;

		}

		$tag  = $translations . $cond_before . $before_handle;

		$tag .= sprintf( "<script%s src='%s' id='%s-js'></script>\n", $this->type_attr, $src, esc_attr( $handle ) );

		$tag .= $after_handle . $cond_after;

		/**

		 * Filters the HTML script tag of an enqueued script.

		 *

		 * @since 4.1.0

		 *

		 * @param string $tag    The `<script>` tag for the enqueued script.

		 * @param string $handle The script's registered handle.

		 * @param string $src    The script's source URL.

		 */

		$tag = apply_filters( 'script_loader_tag', $tag, $handle, $src );

		if ( $this->do_concat ) {

			$this->print_html .= $tag;

		} else {

			echo $tag;

		}

		return true;

	}

	/**

	 * Adds extra code to a registered script.

	 *

	 * @since 4.5.0

	 *

	 * @param string $handle   Name of the script to add the inline script to.

	 *                         Must be lowercase.