<?php
/**
* JS Optimizer
* Credits: https://github.com/Automattic/nginx-http-concat/blob/master/jsconcat.php
*
* @package PoweredCache\Optimizer
*/
namespace PoweredCache\Optimizer;
use \WP_Scripts as WP_Scripts;
//phpcs:disable Squiz.Commenting.VariableComment.Missing
//phpcs:disable Generic.Commenting.DocComment.MissingShort
//phpcs:disable Squiz.Commenting.FunctionComment.MissingParamName
//phpcs:disable Squiz.Commenting.FunctionComment.MissingParamTag
//phpcs:disable Squiz.Commenting.FunctionComment.MissingParamComment
/**
* Class JS
*/
class JS extends WP_Scripts {
private $old_scripts;
public $allow_gzip_compression;
public $do_minify;
public $excluded_files = [];
/**
* JS constructor.
*
* @param object $scripts \WP_Scripts
*/
public function __construct( $scripts ) {
if ( empty( $scripts ) || ! ( $scripts instanceof WP_Scripts ) ) {
$this->old_scripts = new WP_Scripts();
} else {
$this->old_scripts = $scripts;
}
// Unset all the object properties except our private copy of the scripts object.
// We have to unset everything so that the overload methods talk to $this->old_scripts->whatever
// instead of $this->whatever.
foreach ( array_keys( get_object_vars( $this ) ) as $key ) {
if ( 'old_scripts' === $key ) {
continue;
}
unset( $this->$key );
}
}
/**
* Check given handle has inline JS
*
* @param string $handle JS handle
*
* @return bool
*/
protected function has_inline_content( $handle ) {
$before_output = $this->get_data( $handle, 'before' );
if ( ! empty( $before_output ) ) {
return true;
}
$after_output = $this->get_data( $handle, 'after' );
if ( ! empty( $after_output ) ) {
return true;
}
// JavaScript translations
$has_translations = ! empty( $this->registered[ $handle ]->textdomain );
if ( $has_translations ) {
return true;
}
return false;
}
/**
* Prep items for concat
*
* @param bool $handles
* @param bool $group
*
* @return array|string[]
*/
public function do_items( $handles = false, $group = false ) {
$abspath = wp_normalize_path( ABSPATH );
$handles = false === $handles ? $this->queue : (array) $handles;
$javascripts = array();
$siteurl = apply_filters( 'powered_cache_fo_site_url', $this->base_url );
$this->all_deps( $handles );
$level = 0;
foreach ( $this->to_do as $key => $handle ) {
if ( in_array( $handle, $this->done, true ) || ! isset( $this->registered[ $handle ] ) ) {
continue;
}
if ( 0 === $group && $this->groups[ $handle ] > 0 ) {
$this->in_footer[] = $handle;
unset( $this->to_do[ $key ] );
continue;
}
if ( ! $this->registered[ $handle ]->src ) { // Defines a group.
// if there are localized items, echo them
$this->print_extra_script( $handle );
$this->done[] = $handle;
continue;
}
if ( false === $group && in_array( $handle, $this->in_footer, true ) ) {
$this->in_footer = array_diff( $this->in_footer, (array) $handle );
}
$obj = $this->registered[ $handle ];
$js_url = $obj->src;
$js_url_parsed = wp_parse_url( $js_url );
$extra = $obj->extra;
// Don't concat by default
$do_concat = false;
// Only try to concat static js files
if ( false !== strpos( $js_url_parsed['path'], '.js' ) ) {
$do_concat = true;
}
// Don't try to concat externally hosted scripts
$is_internal_url = Helper::is_internal_url( $js_url, $siteurl );
if ( ! $is_internal_url ) {
$do_concat = false;
}
// Concat and canonicalize the paths only for
// existing scripts that aren't outside ABSPATH
$js_realpath = Helper::realpath( $js_url, $siteurl );
if ( ! $js_realpath || 0 !== strpos( $js_realpath, $abspath ) ) {
$do_concat = false;
} else {
$js_url_parsed['path'] = substr( $js_realpath, strlen( $abspath ) - 1 );
}
if ( $this->has_inline_content( $handle ) ) {
$do_concat = false;
}
// Skip core scripts that use Strict Mode
if ( 'react' === $handle || 'react-dom' === $handle ) {
$do_concat = false;
}
if ( Helper::is_excluded_js( $js_url ) ) {
$do_concat = false;
}
/**
* Allow plugins to disable concatenation of certain scripts.
*
* @hook powered_cache_fo_js_do_concat
*
* @param {boolean} $do_concat Contact status.
* @param {string} $handle Handle of script.
*
* @return {boolean} New value.
* @since 2.0
*/
$do_concat = apply_filters( 'powered_cache_fo_js_do_concat', $do_concat, $handle );
if ( true === $do_concat ) {
if ( ! isset( $javascripts[ $level ] ) ) {
$javascripts[ $level ]['type'] = 'concat';
}
$javascripts[ $level ]['paths'][] = $js_url_parsed['path'];
$javascripts[ $level ]['handles'][] = $handle;
} else {
$level ++;
$javascripts[ $level ]['type'] = 'do_item';
$javascripts[ $level ]['handle'] = $handle;
$level ++;
}
unset( $this->to_do[ $key ] );
}
if ( empty( $javascripts ) ) {
return $this->done;
}
foreach ( $javascripts as $js_array ) {
if ( 'do_item' === $js_array['type'] ) {
if ( $this->do_item( $js_array['handle'], $group ) ) {
$this->done[] = $js_array['handle'];
}
} elseif ( 'concat' === $js_array['type'] ) {
array_map( array( $this, 'print_extra_script' ), $js_array['handles'] );
if ( isset( $js_array['paths'] ) && count( $js_array['paths'] ) > 1 ) {
$paths = array_map(
function ( $url ) use ( $abspath ) {
return $abspath . $url;
},
$js_array['paths']
);
$mtime = max( array_map( 'filemtime', $paths ) );
$path_str = implode( ',', $js_array['paths'] ) . "?m={$mtime}j";
if ( $this->allow_gzip_compression ) {
$path_64 = base64_encode( gzcompress( $path_str ) ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
if ( strlen( $path_str ) > ( strlen( $path_64 ) + 1 ) ) {
$path_str = '-' . $path_64;
}
}
$href = Helper::get_optimized_url( $path_str, $this->do_minify );
} elseif ( isset( $js_array['paths'] ) && is_array( $js_array['paths'] ) ) {
$href = $this->cache_bust_mtime( $siteurl . $js_array['paths'][0], $siteurl );
}
$this->done = array_merge( $this->done, $js_array['handles'] );
// Print before/after scripts from wp_inline_scripts() and concatenated script tag
if ( isset( $js_array['extras']['before'] ) ) {
foreach ( $js_array['extras']['before'] as $inline_before ) {
echo $inline_before; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}
}
if ( isset( $href ) ) {
/**
* Filters combined script loader tags.
*
* @hook powered_cache_fo_script_loader_tag
*
* @param {string} $js_tag JS tag.
*
* @return {string} New value.
* @since 2.0
*/
echo apply_filters( 'powered_cache_fo_script_loader_tag', "<script type='text/javascript' src='$href'></script>", $href ); // phpcs:ignore
echo PHP_EOL;
}
if ( isset( $js_array['extras']['after'] ) ) {
foreach ( $js_array['extras']['after'] as $inline_after ) {
echo $inline_after; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}
}
}
}
/**
* Fires after combine JS
*
* @hook powered_cache_fo_js_concat_did_items
*
* @param {array} $javascripts JS resources.
*
* @since 2.0
*/
do_action( 'powered_cache_fo_js_concat_did_items', $javascripts );
return $this->done;
}
/**
* Bust cache
*
* @param string $url URL
* @param string $siteurl Site URL
*
* @return string
*/
public function cache_bust_mtime( $url, $siteurl ) {
if ( strpos( $url, '?m=' ) ) {
return $url;
}
$parts = wp_parse_url( $url );
if ( ! isset( $parts['path'] ) || empty( $parts['path'] ) ) {
return $url;
}
$file = Helper::realpath( $url, $siteurl );
$mtime = false;
if ( file_exists( $file ) ) {
$mtime = filemtime( $file );
}
if ( ! $mtime ) {
return $url;
}
if ( false === strpos( $url, '?' ) ) {
$q = '';
} else {
list( $url, $q ) = explode( '?', $url, 2 );
if ( strlen( $q ) ) {
$q = '&' . $q;
}
}
return "$url?m={$mtime}g{$q}";
}
/**
* @param $key
*
* @return bool
*/
public function __isset( $key ) {
return isset( $this->old_scripts->$key );
}
/**
* @param $key
*/
public function __unset( $key ) {
unset( $this->old_scripts->$key );
}
/**
* @param $key
*
* @return mixed
*/
public function &__get( $key ) {
return $this->old_scripts->$key;
}
/**
* @param $key
* @param $value
*/
public function __set( $key, $value ) {
$this->old_scripts->$key = $value;
}
}