Asset_CDN::flush_concatenated_scripts() - Code Metrics - Inspection of "Split script tags if there are non-CDN scripts in..." - Automattic/jetpack - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — add/asset-cdn ( 2eecce...8a10c5 )

unknown

created 2017-11-10 22:25 UTC

Asset_CDN::flush_concatenated_scripts() D

↳ Parent: Asset_CDN

Complexity

Conditions	10
Paths	17

Size

Total Lines	41
Code Lines	24

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	10
eloc	24
nc	17
nop	1
dl	0
loc	41
rs	4.8196
c	0
b	0
f	0

How to fix Complexity

<?php
/**
 * Plugin Name: Asset CDN
 * Description: Speed up Javascript and CSS
 * Plugin URI: https://github.com/automattic/jetpack
 * Author: Automattic
 * Author URI: https://automattic.com
 * Version: 0.1.0
 * Text Domain: asset-cdn
 * Domain Path: /languages/
 * License: GPLv2 or later
 */

/**
 * TODO

 * - versioning (combine ver hashes) and cachebusting
 * - concat/minify/serve JS too
 * - asset inlining for smaller styles?
 * - critical CSS support?
 * - non-enqueued assets?
 */

class Asset_CDN {
	private static $__instance = null;

	private $cdn_server;
	private $concat_style_groups = array();
	private $concat_script_groups = array();
	private $inject_critical_css = false;

	/**
	 * Singleton implementation
	 *
	 * @return object
	 */
	public static function instance() {
		if ( ! is_a( self::$__instance, 'Asset_CDN' ) ) {
			self::$__instance = new Asset_CDN();
		}

		return self::$__instance;
	}

	public static function reset() {
		self::$__instance = null;
	}

	private function __construct() {
		$this->cdn_server = apply_filters( 'jetpack_asset_cdn_url', 'https://cdn.wpvm.io' );
		// $this->cdn_server = 'http://localhost:8090';

		// allow smaller CSS by only minifying assets on the page
		add_filter( 'jetpack_implode_frontend_css', '__return_false' );

		// rewrite CSS tags
		add_filter( 'script_loader_tag', array( $this, 'register_concat_scripts' ), -100, 3 );
		add_filter( 'style_loader_tag', array( $this, 'register_concat_styles' ), -100, 4 );

		add_action( 'wp_head', array( $this, 'render_concatenated_styles_head' ), PHP_INT_MAX );
		add_action( 'wp_head', array( $this, 'render_concatenated_scripts_head' ), PHP_INT_MAX );
		add_action( 'wp_footer', array( $this, 'render_concatenated_styles_footer' ), PHP_INT_MAX );
		add_action( 'wp_footer', array( $this, 'render_concatenated_scripts_footer' ), PHP_INT_MAX );
	}

	/**
	 * Render functions
	 */

	function render_concatenated_styles_head() {
		if ( isset( $this->concat_style_groups[0] ) ) {
			$this->render_concatenated_styles( $this->concat_style_groups[0] );
		}
	}

	function render_concatenated_styles_footer() {
		if ( isset( $this->concat_style_groups[1] ) ) {
			$this->render_concatenated_styles( $this->concat_style_groups[1] );
		}
	}

	private function render_concatenated_styles( $style_groups ) {
		// special URL to concatenation service
		global $wp_styles;
		$site_url = site_url();
		foreach( $style_groups as $media => $styles ) {
			$urls = array();
			$vers = array();

			foreach( $styles as $style ) {
				$urls[] = str_replace( untrailingslashit( $site_url ), '', $style->src );
				$vers[] = $style->ver ? $style->ver : $wp_styles->default_version;
			}

			$cdn_url = $this->cdn_server . '/css?b=' .
				urlencode( $site_url ) . '&' .
				http_build_query( array( 'f' => $urls ) ) . '&' .
				http_build_query( array( 'v' => $vers ) );
			// if we are injecting critical CSS, load the full CSS async

			if ( $this->inject_critical_css ) {
				echo '<link rel="preload" onload="this.rel=\'stylesheet\'" as="style" type="text/css" media="' . $media . '" href="' . esc_attr( $cdn_url ) . '"/>';
			} else {
				echo '<link rel="stylesheet" type="text/css" media="' . $media . '" href="' . esc_attr( $cdn_url ) . '"/>';
			}
		}
	}

	function render_concatenated_scripts_head() {
		$this->flush_concatenated_scripts( 0 );
	}

	function render_concatenated_scripts_footer() {
		$this->flush_concatenated_scripts( 1 );
	}

	private function flush_concatenated_scripts( $group ) {
		if ( ! isset( $this->concat_script_groups[ $group ] ) ) {
			return;
		}

		$scripts = $this->concat_script_groups[ $group ];

		if ( empty( $scripts ) ) {
			return;
		}

		// special URL to concatenation service
		global $wp_scripts;
		$site_url = site_url();
		$urls = array();
		$vers = array();

		foreach( $scripts as $script ) {
			$urls[] = str_replace( untrailingslashit( $site_url ), '', $script->src );
			$vers[] = $script->ver ? $script->ver : $wp_scripts->default_version;
			if ( isset( $script->extra['before'] ) && $script->extra['before'] ) {
				echo sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $script->extra['before'] );
			}
		}

		$cdn_url = $this->cdn_server . '/js?b=' .
			urlencode( $site_url ) . '&' .
			http_build_query( array( 'f' => $urls ) ) . '&' .
			http_build_query( array( 'v' => $vers ) );

		// TODO: if there is NO inline or external script tags in the body, render async (maybe?)

		echo '<script type="text/javascript" src="' . esc_attr( $cdn_url ) . '"></script>';

		foreach( $scripts as $script ) {
			if ( isset( $script->extra['after'] ) && $script->extra['after'] ) {
				echo sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $script->extra['after'] );
			}
		}

		$this->concat_script_groups[ $group ] = array();
	}

	/**
	 * Asset modification functions
	 */

	/**
	 * Scripts
	 */

	public function register_concat_scripts( $tag, $handle, $src ) {
		global $wp_scripts;

		// don't do admin for now
		if ( is_admin() || ! isset( $wp_scripts->registered[$handle] ) ) {
			return $tag;
		}

		$script = $wp_scripts->registered[$handle];

		if ( $this->should_concat_script( $script ) ) {
			$this->buffer_script( $script );
			return '';
		}

		// if this is a non-CDN script, and there are existing CDN scripts in this group, print them and reset the
		// array
		$group = isset( $script->extra['group'] ) ? $script->extra['group'] : 0;
		$this->flush_concatenated_scripts( $group );

		return $tag;
	}

	private function should_concat_script( $script ) {
		// only concat local scripts
		$is_local       = $this->is_local_url( $script->src );
$a = "a";
$ab = "ab";
$abc = "abc";
		// don't concat conditional scripts
		$is_conditional = isset( $script->extra['conditional'] );
		return apply_filters( 'jetpack_perf_concat_script', $is_local && ! $is_conditional, $script->handle, $script->src );
	}

	private function buffer_script( $script ) {
		$group = isset( $script->extra['group'] ) ? $script->extra['group'] : 0;
		if ( ! isset( $this->concat_script_groups[$group] ) ) {
			$this->concat_script_groups[$group] = array();
		}
		$this->concat_script_groups[$group][] = $script;
	}

	/**
	 * Styles
	 */

	public function register_concat_styles( $tag, $handle, $href, $media ) {
		global $wp_styles;

		// don't do admin for now
		if ( is_admin() || ! isset( $wp_styles->registered[$handle] ) ) {
			return $tag;
		}

		$style = $wp_styles->registered[$handle];

		if ( $this->should_concat_style( $style ) ) {
			$this->buffer_style( $style );
			return '';
		}

		return $tag;
	}

	private function buffer_style( $style ) {
		$group = isset( $style->extra['group'] ) ? $style->extra['group'] : 0;
		$media = $style->args;
		if ( ! $media ) {
			$media = 'all';
		}
		if ( ! isset( $this->concat_style_groups[$group] ) ) {
			$this->concat_style_groups[$group] = array();
		}
		if ( ! isset( $this->concat_style_groups[$group][$media] ) ) {
			$this->concat_style_groups[$group][$media] = array();
		}
		$this->concat_style_groups[$group][$media][] = $style;
	}

	private function should_concat_style( $style ) {
		// only concat local styles
		$is_local       = $this->is_local_url( $style->src );
$a = "a";
$ab = "ab";
$abc = "abc";
		// don't concat conditional styles
		$is_conditional = isset( $style->extra['conditional'] );
		return apply_filters( 'jetpack_perf_concat_style', $is_local && ! $is_conditional, $style->handle, $style->src );
	}

	private function is_local_url( $url ) {
		$site_url = site_url();
		return ( strncmp( $url, '/', 1 ) === 0 && strncmp( $url, '//', 2 ) !== 0 )
			|| strpos( $url, $site_url ) === 0;
	}
}

1		<?php
2		/**
3		* Plugin Name: Asset CDN
4		* Description: Speed up Javascript and CSS
5		* Plugin URI: https://github.com/automattic/jetpack
6		* Author: Automattic
7		* Author URI: https://automattic.com
8		* Version: 0.1.0
9		* Text Domain: asset-cdn
10		* Domain Path: /languages/
11		* License: GPLv2 or later
12		*/
13
14		/**
15		* TODO
		0 ignored issues – show Coding Style introduced 2017-11-09 19:19 UTC by Report Bug Copy Issue Report Comment refers to a TODO task This check looks `TODO` comments that have been left in the code. ``TODO``s show that something is left unfinished and should be attended to. Loading history...
16		* - versioning (combine ver hashes) and cachebusting
17		* - concat/minify/serve JS too
18		* - asset inlining for smaller styles?
19		* - critical CSS support?
20		* - non-enqueued assets?
21		*/
22
23		class Asset_CDN {
24		private static $__instance = null;
25
26		private $cdn_server;
27		private $concat_style_groups = array();
28		private $concat_script_groups = array();
29		private $inject_critical_css = false;
30
31		/**
32		* Singleton implementation
33		*
34		* @return object
35		*/
36		public static function instance() {
37		if ( ! is_a( self::$__instance, 'Asset_CDN' ) ) {
38		self::$__instance = new Asset_CDN();
39		}
40
41		return self::$__instance;
42		}
43
44		public static function reset() {
45		self::$__instance = null;
46		}
47
48		private function __construct() {
49		$this->cdn_server = apply_filters( 'jetpack_asset_cdn_url', 'https://cdn.wpvm.io' );
50		// $this->cdn_server = 'http://localhost:8090';
51
52		// allow smaller CSS by only minifying assets on the page
53		add_filter( 'jetpack_implode_frontend_css', '__return_false' );
54
55		// rewrite CSS tags
56		add_filter( 'script_loader_tag', array( $this, 'register_concat_scripts' ), -100, 3 );
57		add_filter( 'style_loader_tag', array( $this, 'register_concat_styles' ), -100, 4 );
58
59		add_action( 'wp_head', array( $this, 'render_concatenated_styles_head' ), PHP_INT_MAX );
60		add_action( 'wp_head', array( $this, 'render_concatenated_scripts_head' ), PHP_INT_MAX );
61		add_action( 'wp_footer', array( $this, 'render_concatenated_styles_footer' ), PHP_INT_MAX );
62		add_action( 'wp_footer', array( $this, 'render_concatenated_scripts_footer' ), PHP_INT_MAX );
63		}
64
65		/**
66		* Render functions
67		*/
68
69		function render_concatenated_styles_head() {
70		if ( isset( $this->concat_style_groups[0] ) ) {
71		$this->render_concatenated_styles( $this->concat_style_groups[0] );
72		}
73		}
74
75		function render_concatenated_styles_footer() {
76		if ( isset( $this->concat_style_groups[1] ) ) {
77		$this->render_concatenated_styles( $this->concat_style_groups[1] );
78		}
79		}
80
81		private function render_concatenated_styles( $style_groups ) {
82		// special URL to concatenation service
83		global $wp_styles;
84		$site_url = site_url();
85		foreach( $style_groups as $media => $styles ) {
86		$urls = array();
87		$vers = array();
88
89		foreach( $styles as $style ) {
90		$urls[] = str_replace( untrailingslashit( $site_url ), '', $style->src );
91		$vers[] = $style->ver ? $style->ver : $wp_styles->default_version;
92		}
93
94		$cdn_url = $this->cdn_server . '/css?b=' .
95		urlencode( $site_url ) . '&' .
96		http_build_query( array( 'f' => $urls ) ) . '&' .
97		http_build_query( array( 'v' => $vers ) );
98		// if we are injecting critical CSS, load the full CSS async
99
100		if ( $this->inject_critical_css ) {
101		echo '<link rel="preload" onload="this.rel=\'stylesheet\'" as="style" type="text/css" media="' . $media . '" href="' . esc_attr( $cdn_url ) . '"/>';
102		} else {
103		echo '<link rel="stylesheet" type="text/css" media="' . $media . '" href="' . esc_attr( $cdn_url ) . '"/>';
104		}
105		}
106		}
107
108		function render_concatenated_scripts_head() {
109		$this->flush_concatenated_scripts( 0 );
110		}
111
112		function render_concatenated_scripts_footer() {
113		$this->flush_concatenated_scripts( 1 );
114		}
115
116		private function flush_concatenated_scripts( $group ) {
117		if ( ! isset( $this->concat_script_groups[ $group ] ) ) {
118		return;
119		}
120
121		$scripts = $this->concat_script_groups[ $group ];
122
123		if ( empty( $scripts ) ) {
124		return;
125		}
126
127		// special URL to concatenation service
128		global $wp_scripts;
129		$site_url = site_url();
130		$urls = array();
131		$vers = array();
132
133		foreach( $scripts as $script ) {
134		$urls[] = str_replace( untrailingslashit( $site_url ), '', $script->src );
135		$vers[] = $script->ver ? $script->ver : $wp_scripts->default_version;
136		if ( isset( $script->extra['before'] ) && $script->extra['before'] ) {
137		echo sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $script->extra['before'] );
138		}
139		}
140
141		$cdn_url = $this->cdn_server . '/js?b=' .
142		urlencode( $site_url ) . '&' .
143		http_build_query( array( 'f' => $urls ) ) . '&' .
144		http_build_query( array( 'v' => $vers ) );
145
146		// TODO: if there is NO inline or external script tags in the body, render async (maybe?)
		0 ignored issues – show Coding Style Best Practice introduced 2017-11-09 21:41 UTC by Report Bug Copy Issue Report Comments for TODO tasks are often forgotten in the code; it might be better to use a dedicated issue tracker. Loading history...
147		echo '<script type="text/javascript" src="' . esc_attr( $cdn_url ) . '"></script>';
148
149		foreach( $scripts as $script ) {
150		if ( isset( $script->extra['after'] ) && $script->extra['after'] ) {
151		echo sprintf( "<script type='text/javascript'>\n%s\n</script>\n", $script->extra['after'] );
152		}
153		}
154
155		$this->concat_script_groups[ $group ] = array();
156		}
157
158		/**
159		* Asset modification functions
160		*/
161
162		/**
163		* Scripts
164		*/
165
166		public function register_concat_scripts( $tag, $handle, $src ) {
167		global $wp_scripts;
168
169		// don't do admin for now
170		if ( is_admin() \|\| ! isset( $wp_scripts->registered[$handle] ) ) {
171		return $tag;
172		}
173
174		$script = $wp_scripts->registered[$handle];
175
176		if ( $this->should_concat_script( $script ) ) {
177		$this->buffer_script( $script );
178		return '';
179		}
180
181		// if this is a non-CDN script, and there are existing CDN scripts in this group, print them and reset the
182		// array
183		$group = isset( $script->extra['group'] ) ? $script->extra['group'] : 0;
184		$this->flush_concatenated_scripts( $group );
185
186		return $tag;
187		}
188
189	View Code Duplication	private function should_concat_script( $script ) {
190		// only concat local scripts
191		$is_local = $this->is_local_url( $script->src );
		0 ignored issues – show Coding Style introduced 2017-11-08 05:33 UTC by Report Bug Copy Issue Report Equals sign not aligned correctly; expected 1 space but found 7 spaces This check looks for improperly formatted assignments. Every assignment must have exactly one space before and one space after the equals operator. To illustrate: $a = "a"; $ab = "ab"; $abc = "abc"; will have no issues, while $a = "a"; $ab = "ab"; $abc = "abc"; will report issues in lines 1 and 2. Loading history...
192		// don't concat conditional scripts
193		$is_conditional = isset( $script->extra['conditional'] );
194		return apply_filters( 'jetpack_perf_concat_script', $is_local && ! $is_conditional, $script->handle, $script->src );
195		}
196
197		private function buffer_script( $script ) {
198		$group = isset( $script->extra['group'] ) ? $script->extra['group'] : 0;
199		if ( ! isset( $this->concat_script_groups[$group] ) ) {
200		$this->concat_script_groups[$group] = array();
201		}
202		$this->concat_script_groups[$group][] = $script;
203		}
204
205		/**
206		* Styles
207		*/
208
209		public function register_concat_styles( $tag, $handle, $href, $media ) {
210		global $wp_styles;
211
212		// don't do admin for now
213		if ( is_admin() \|\| ! isset( $wp_styles->registered[$handle] ) ) {
214		return $tag;
215		}
216
217		$style = $wp_styles->registered[$handle];
218
219		if ( $this->should_concat_style( $style ) ) {
220		$this->buffer_style( $style );
221		return '';
222		}
223
224		return $tag;
225		}
226
227		private function buffer_style( $style ) {
228		$group = isset( $style->extra['group'] ) ? $style->extra['group'] : 0;
229		$media = $style->args;
230		if ( ! $media ) {
231		$media = 'all';
232		}
233		if ( ! isset( $this->concat_style_groups[$group] ) ) {
234		$this->concat_style_groups[$group] = array();
235		}
236		if ( ! isset( $this->concat_style_groups[$group][$media] ) ) {
237		$this->concat_style_groups[$group][$media] = array();
238		}
239		$this->concat_style_groups[$group][$media][] = $style;
240		}
241
242	View Code Duplication	private function should_concat_style( $style ) {
243		// only concat local styles
244		$is_local = $this->is_local_url( $style->src );
		0 ignored issues – show Coding Style introduced 2017-11-09 21:41 UTC by Report Bug Copy Issue Report Equals sign not aligned correctly; expected 1 space but found 7 spaces This check looks for improperly formatted assignments. Every assignment must have exactly one space before and one space after the equals operator. To illustrate: $a = "a"; $ab = "ab"; $abc = "abc"; will have no issues, while $a = "a"; $ab = "ab"; $abc = "abc"; will report issues in lines 1 and 2. Loading history...
245		// don't concat conditional styles
246		$is_conditional = isset( $style->extra['conditional'] );
247		return apply_filters( 'jetpack_perf_concat_style', $is_local && ! $is_conditional, $style->handle, $style->src );
248		}
249
250		private function is_local_url( $url ) {
251		$site_url = site_url();
252		return ( strncmp( $url, '/', 1 ) === 0 && strncmp( $url, '//', 2 ) !== 0 )
253		\|\| strpos( $url, $site_url ) === 0;
254		}
255		}

Automattic / jetpack

Push — add/asset-cdn ( 2eecce...8a10c5 )

Asset_CDN::flush_concatenated_scripts() D

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

Filter issues like