<?php

/**

 *

 * @since 2.6.0

 *

 * @package WordPress

 */

/**

 * Initialize $wp_scripts if it has not been set.

 *

 * @global WP_Scripts $wp_scripts

 *

 * @since 4.2.0

 *

 * @return WP_Scripts WP_Scripts instance.

 */

function wp_scripts() {

	global $wp_scripts;

	if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {

		$wp_scripts = new WP_Scripts();

	}

	return $wp_scripts;

}

/**

 * Helper function to output a _doing_it_wrong message when applicable.

 *

 * @ignore

 * @since 4.2.0

 *

 * @param string $function Function name.

 */

function _wp_scripts_maybe_doing_it_wrong( $function ) {

		return;

	}

	_doing_it_wrong( $function, sprintf(

		__( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ),

		'<code>wp_enqueue_scripts</code>',

		'<code>admin_enqueue_scripts</code>',

		'<code>login_enqueue_scripts</code>'

}

/**

 *

 * the function does not instantiate the WP_Scripts object unless script names are explicitly passed.

 * hook to register/enqueue new scripts.

 *

 * @see WP_Scripts::do_items()

 * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.

 *

 *

 * @param string|bool|array $handles Optional. Scripts to be printed. Default 'false'.

 * @return array On success, a processed array of WP_Dependencies items; otherwise, an empty array.

 */

function wp_print_scripts( $handles = false ) {

	/**

	 * Fires before scripts in the $handles queue are printed.

	 *

	 * @since 2.1.0

	 */

	do_action( 'wp_print_scripts' );

	if ( '' === $handles ) { // for wp_head

		$handles = false;

	}

	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

	global $wp_scripts;

	if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {

		if ( ! $handles ) {

			return array(); // No need to instantiate if nothing is there.

		}

	}

	return wp_scripts()->do_items( $handles );

}

/**

 * Register a new script.

 *

 *

 *

 *

 */

function wp_register_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {

	$wp_scripts = wp_scripts();

	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

	if ( $in_footer ) {

		$wp_scripts->add_data( $handle, 'group', 1 );

	}

}

/**

 * Localize a script.

 *

 * Works only if the script has already been added.

 *

 * Accepts an associative array $l10n and creates a JavaScript object:

 *

 *     "$object_name" = {

 *         key: value,

 *         key: value,

 *         ...

 *     }

 *

 *

 * @see WP_Dependencies::localize()

 * @link https://core.trac.wordpress.org/ticket/11520

 * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.

 *

 *

 * @todo Documentation cleanup

 *

 * @param string $handle      Script handle the data will be attached to.

 * @param string $object_name Name for the JavaScript object. Passed directly, so it should be qualified JS variable.

 *                            Example: '/[a-zA-Z0-9_]+/'.

 * @param array $l10n         The data itself. The data can be either a single or multi-dimensional array.

 * @return bool True if the script was successfully localized, false otherwise.

 */

function wp_localize_script( $handle, $object_name, $l10n ) {

	global $wp_scripts;

	if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {

		_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

		return false;

	}

}

/**

 * Remove a registered script.

 *

 * Note: there are intentional safeguards in place to prevent critical admin scripts,

 * such as jQuery core, from being unregistered.

 *

 * @see WP_Dependencies::remove()

 *

 *

 * @param string $handle Name of the script to be removed.

 */

function wp_deregister_script( $handle ) {

	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

	/**

	 * Do not allow accidental or negligent de-registering of critical scripts in the admin.

	 * Show minimal remorse if the correct hook is used.

	 */

	$current_filter = current_filter();

	if ( ( is_admin() && 'admin_enqueue_scripts' !== $current_filter ) ||

		( 'wp-login.php' === $GLOBALS['pagenow'] && 'login_enqueue_scripts' !== $current_filter )

	) {

		$no = array(

			'jquery', 'jquery-core', 'jquery-migrate', 'jquery-ui-core', 'jquery-ui-accordion',

			'jquery-ui-autocomplete', 'jquery-ui-button', 'jquery-ui-datepicker', 'jquery-ui-dialog',

			'jquery-ui-draggable', 'jquery-ui-droppable', 'jquery-ui-menu', 'jquery-ui-mouse',

			'jquery-ui-position', 'jquery-ui-progressbar', 'jquery-ui-resizable', 'jquery-ui-selectable',

			'jquery-ui-slider', 'jquery-ui-sortable', 'jquery-ui-spinner', 'jquery-ui-tabs',

			'jquery-ui-tooltip', 'jquery-ui-widget', 'underscore', 'backbone',

		);

		if ( in_array( $handle, $no ) ) {

			return;

		}

	}

	wp_scripts()->remove( $handle );

}

/**

 * Enqueue a script.

 *

 * Registers the script if $src provided (does NOT overwrite), and enqueues it.

 *

 *

 *

 */

	$wp_scripts = wp_scripts();

	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

	if ( $src || $in_footer ) {

		$_handle = explode( '?', $handle );

		if ( $src ) {

			$wp_scripts->add( $_handle[0], $src, $deps, $ver );

		}

		if ( $in_footer ) {

			$wp_scripts->add_data( $_handle[0], 'group', 1 );

		}

	}

	$wp_scripts->enqueue( $handle );

}

/**

 * Remove a previously enqueued script.

 *

 * @see WP_Dependencies::dequeue()

 *

 * @since 3.1.0

 *

 * @param string $handle Name of the script to be removed.

 */

function wp_dequeue_script( $handle ) {

	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

	wp_scripts()->dequeue( $handle );

}

/**

 * Check whether a script has been added to the queue.

 *

 * @since 2.8.0

 * @since 3.5.0 'enqueued' added as an alias of the 'queue' list.

 *

 * @param string $handle Name of the script.

 * @param string $list   Optional. Status of the script to check. Default 'enqueued'.

 *                       Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.

 */

function wp_script_is( $handle, $list = 'enqueued' ) {

	_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );

	return (bool) wp_scripts()->query( $handle, $list );

}

/**

 * Add metadata to a script.

 *

 * Works only if the script has already been added.

 *

 * Possible values for $key and $value:

 * 'conditional' string Comments for IE 6, lte IE 7, etc.

 *

 * @since 4.2.0

 *

 * @see WP_Dependency::add_data()

 *

 * @param string $handle Name of the script.

 * @param string $key    Name of data point for which we're storing a value.

 * @param mixed  $value  String containing the data to be added.

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

 */

function wp_script_add_data( $handle, $key, $value ){

}