LSX_LazyLoadImages::init() - Code Metrics - Inspection of "adding protocols and tags to allowed wp_kses_post..." - lightspeeddevelopment/lsx - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( fc9d9d...72c4b0 )

unknown

created 2016-10-06 14:00 UTC

LSX_LazyLoadImages::init() A

↳ Parent: LSX_LazyLoadImages

Complexity

Conditions	4
Paths	4

Size

Total Lines	19
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	4
eloc	13
nc	4
nop	0
dl	0
loc	19
rs	9.2
c	0
b	0
f	0

<?php
if ( ! defined( 'ABSPATH' ) ) return;

/*
 * LSX Lazy Load Images Class
 * 
 * add_filters availables:
 *   lsx_lazyload_is_enabled
 *   lsx_lazyload_placeholder_image
 * 
 * apply_filters availables:
 *   lsx_lazyload_filter_images
 * 
 * Currently filtering:
 *   the_content
 *   widget_text
 *   post_thumbnail_html
 *   get_avatar
 *   envira_gallery_output_image
 */
class LSX_LazyLoadImages {
	protected static $enabled = true;

	protected static $noscript_id = 0;
	protected static $noscripts   = array();

	static function init() {

		if ( is_admin() )
			return;

		if ( get_theme_mod( 'lsx_lazyload_status', '1' ) === false ) {
			self::$enabled = false;
			return;
		}

		if ( ! apply_filters( 'lsx_lazyload_is_enabled', true ) ) {
			self::$enabled = false;
			return;
		}

		add_action( 'wp_enqueue_scripts', array( __CLASS__, 'add_scripts' ) );
		add_action( 'wp_head', array( __CLASS__, 'setup_filters' ), 9999 );
		add_filter( 'wp_kses_allowed_html', array( __CLASS__, 'kses_allowed_html' ), 10, 2 );
		add_filter( 'kses_allowed_protocols', array( __CLASS__, 'kses_allowed_protocols' ) );
	}

	static function setup_filters() {

		// WordPress
		add_filter( 'the_content', array( __CLASS__, 'filter_images' ), 200 );
		add_filter( 'widget_text', array( __CLASS__, 'filter_images' ), 200 );
		add_filter( 'post_thumbnail_html', array( __CLASS__, 'filter_images' ), 200 );
		add_filter( 'get_avatar', array( __CLASS__, 'filter_images' ), 200 );
		
		// LSX
		add_filter( 'lsx_lazyload_filter_images', array( __CLASS__, 'filter_images' ), 200 );

		// Envira Gallery
		add_filter( 'envira_gallery_output_image', array( __CLASS__, 'filter_images' ), 200 );
	}

	static function add_scripts() {

		wp_enqueue_script( 'lazysizes', get_template_directory_uri() .'/js/vendor/lazysizes.min.js', array( 'jquery' ), null, true );
		// Plugin that enables use lazysizes in brackground images
		//wp_enqueue_script( 'lazysizes', get_template_directory_uri() .'/js/vendor/ls.unveilhooks.min.js', array( 'jquery', 'lazysizes' ), null, true );

	}

	static function filter_images( $content ) {

		if ( ! self::is_enabled() ) {
			return $content;
		}

		$http_user_agent = sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) );
		$http_user_agent = ! empty( $http_user_agent ) ? $http_user_agent : '';

		if ( is_feed()
			|| is_preview()
			|| intval( get_query_var( 'print' ) ) == 1
			|| intval( get_query_var( 'printpage' ) ) == 1
			|| strpos( $http_user_agent, 'Opera Mini' ) !== false
		) {
			return $content;
		}

		$skip_images_regex = '/class=".*(lazyload|disable-lazyload).*"/';
		$placeholder_image = apply_filters( 'lsx_lazyload_placeholder_image', 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' );

		$matches = array();
		$search = array();
		$replace = array();
		
		$content = preg_replace_callback( '~<noscript.+?</noscript>~s', 'self::noscripts_remove', $content );
		preg_match_all( '/<img[^>]*>/', $content, $matches );

		foreach ( $matches[0] as $img_html ) {
			if ( ! ( preg_match( $skip_images_regex, $img_html ) ) ) {
				$add_class = false;

				if ( ! preg_match( '/src=[\'"]([^\'"]+)[\'"]/', $img_html ) && preg_match( '/srcset=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
					$replace_html = preg_replace( '/<img(.*?)srcset=/i', '<img$1srcset="' . $placeholder_image . '" data-srcset=', $img_html );

					if ( preg_match( '/sizes=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
						$replace_html = preg_replace( '/sizes=/i', 'data-sizes=', $replace_html );
					} else {
						$replace_html = preg_replace( '/data-srcset=/i', 'data-sizes="auto" data-srcset=', $replace_html );
					}

					$add_class = true;
				} elseif ( preg_match( '/src=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
					$replace_html = preg_replace( '/<img(.*?)src=/i', '<img$1src="' . $placeholder_image . '" data-src=', $img_html );

					if ( preg_match( '/srcset=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
						if ( preg_match( '/sizes=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
							$replace_html = preg_replace( '/srcset=/i', 'data-srcset=', $replace_html );
							$replace_html = preg_replace( '/sizes=/i', 'data-sizes=', $replace_html );
						} else {
							$replace_html = preg_replace( '/srcset=/i', 'data-sizes="auto" data-srcset=', $replace_html );
						}
					}

					$add_class = true;
				}

				if ( $add_class ) {
					$replace_html = self::add_class( $replace_html, 'lazyload' );
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}
					$replace_html .= '<noscript>' . $img_html . '</noscript>';
					
					array_push( $search, $img_html );
					array_push( $replace, $replace_html );
				}
			}
		}

		$content = str_replace( $search, $replace, $content );
		$content = preg_replace_callback( '~' . chr(20) . '([0-9]+)' . chr(20) . '~', 'self::noscripts_restore', $content );
		return $content;
	}

	static function noscripts_remove( $match ) {

		self::$noscript_id++;
		self::$noscripts[self::$noscript_id] = $match[0];
		return chr(20) . self::$noscript_id . chr(20);
	}

	static function noscripts_restore( $match ) {

		return self::$noscripts[(int) $match[1]];
	}

	static function add_class( $html_string = '', $new_class ) {

		$pattern = '/class=[\'"]([^\'"]*)[\'"]/';

		if ( preg_match( $pattern, $html_string, $matches ) ) {
			$defined_classes = explode( ' ', $matches[1] );

			if ( ! in_array( $new_class, $defined_classes ) ) {
				$defined_classes[] = $new_class;

				$html_string = str_replace(
					$matches[0],
					sprintf( 'class="%s"', implode( ' ', $defined_classes ) ),
					$html_string
				);
			}
		} else {
			$html_string = preg_replace( '/(\<.+\s)/', sprintf( '$1class="%s" ', $new_class ), $html_string );
		}

		return $html_string;
	}

	static function is_enabled() {

		return self::$enabled;
	}

	static function kses_allowed_html( $allowedtags, $context ) {

		$allowedtags['noscript'] = array();
		
		$allowedtags['img']['data-src'] = true;
		$allowedtags['img']['data-srcset'] = true;
		$allowedtags['img']['data-sizes'] = true;

		return $allowedtags;
	}

	static function kses_allowed_protocols( $allowedprotocols ) {

		$allowedprotocols[] = 'data';
		return $allowedprotocols;
	}
}

add_action( 'init', array( 'LSX_LazyLoadImages', 'init' ) );


1			<?php
2			if ( ! defined( 'ABSPATH' ) ) return;
3
4			/*
5			* LSX Lazy Load Images Class
6			*
7			* add_filters availables:
8			* lsx_lazyload_is_enabled
9			* lsx_lazyload_placeholder_image
10			*
11			* apply_filters availables:
12			* lsx_lazyload_filter_images
13			*
14			* Currently filtering:
15			* the_content
16			* widget_text
17			* post_thumbnail_html
18			* get_avatar
19			* envira_gallery_output_image
20			*/
21			class LSX_LazyLoadImages {
22			protected static $enabled = true;
23
24			protected static $noscript_id = 0;
25			protected static $noscripts = array();
26
27			static function init() {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
28			if ( is_admin() )
29			return;
30
31			if ( get_theme_mod( 'lsx_lazyload_status', '1' ) === false ) {
32			self::$enabled = false;
33			return;
34			}
35
36			if ( ! apply_filters( 'lsx_lazyload_is_enabled', true ) ) {
37			self::$enabled = false;
38			return;
39			}
40
41			add_action( 'wp_enqueue_scripts', array( __CLASS__, 'add_scripts' ) );
42			add_action( 'wp_head', array( __CLASS__, 'setup_filters' ), 9999 );
43			add_filter( 'wp_kses_allowed_html', array( __CLASS__, 'kses_allowed_html' ), 10, 2 );
44			add_filter( 'kses_allowed_protocols', array( __CLASS__, 'kses_allowed_protocols' ) );
45			}
46
47			static function setup_filters() {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
48			// WordPress
49			add_filter( 'the_content', array( __CLASS__, 'filter_images' ), 200 );
50			add_filter( 'widget_text', array( __CLASS__, 'filter_images' ), 200 );
51			add_filter( 'post_thumbnail_html', array( __CLASS__, 'filter_images' ), 200 );
52			add_filter( 'get_avatar', array( __CLASS__, 'filter_images' ), 200 );
53
54			// LSX
55			add_filter( 'lsx_lazyload_filter_images', array( __CLASS__, 'filter_images' ), 200 );
56
57			// Envira Gallery
58			add_filter( 'envira_gallery_output_image', array( __CLASS__, 'filter_images' ), 200 );
59			}
60
61			static function add_scripts() {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
62			wp_enqueue_script( 'lazysizes', get_template_directory_uri() .'/js/vendor/lazysizes.min.js', array( 'jquery' ), null, true );
63			// Plugin that enables use lazysizes in brackground images
64			//wp_enqueue_script( 'lazysizes', get_template_directory_uri() .'/js/vendor/ls.unveilhooks.min.js', array( 'jquery', 'lazysizes' ), null, true );
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report `60%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
65			}
66
67			static function filter_images( $content ) {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
68			if ( ! self::is_enabled() ) {
69			return $content;
70			}
71
72			$http_user_agent = sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) );
73			$http_user_agent = ! empty( $http_user_agent ) ? $http_user_agent : '';
74
75			if ( is_feed()
76			\|\| is_preview()
77			\|\| intval( get_query_var( 'print' ) ) == 1
78			\|\| intval( get_query_var( 'printpage' ) ) == 1
79			\|\| strpos( $http_user_agent, 'Opera Mini' ) !== false
80			) {
81			return $content;
82			}
83
84			$skip_images_regex = '/class=".(lazyload\|disable-lazyload)."/';
85			$placeholder_image = apply_filters( 'lsx_lazyload_placeholder_image', 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' );
86
87			$matches = array();
88			$search = array();
89			$replace = array();
90
91			$content = preg_replace_callback( '~<noscript.+?</noscript>~s', 'self::noscripts_remove', $content );
92			preg_match_all( '/<img[^>]*>/', $content, $matches );
93
94			foreach ( $matches[0] as $img_html ) {
95			if ( ! ( preg_match( $skip_images_regex, $img_html ) ) ) {
96			$add_class = false;
97
98			if ( ! preg_match( '/src=[\'"]([^\'"]+)[\'"]/', $img_html ) && preg_match( '/srcset=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
99			$replace_html = preg_replace( '/<img(.*?)srcset=/i', '<img$1srcset="' . $placeholder_image . '" data-srcset=', $img_html );
100
101			if ( preg_match( '/sizes=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
102			$replace_html = preg_replace( '/sizes=/i', 'data-sizes=', $replace_html );
103			} else {
104			$replace_html = preg_replace( '/data-srcset=/i', 'data-sizes="auto" data-srcset=', $replace_html );
105			}
106
107			$add_class = true;
108			} elseif ( preg_match( '/src=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
109			$replace_html = preg_replace( '/<img(.*?)src=/i', '<img$1src="' . $placeholder_image . '" data-src=', $img_html );
110
111			if ( preg_match( '/srcset=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
112			if ( preg_match( '/sizes=[\'"]([^\'"]+)[\'"]/', $img_html ) ) {
113			$replace_html = preg_replace( '/srcset=/i', 'data-srcset=', $replace_html );
114			$replace_html = preg_replace( '/sizes=/i', 'data-sizes=', $replace_html );
115			} else {
116			$replace_html = preg_replace( '/srcset=/i', 'data-sizes="auto" data-srcset=', $replace_html );
117			}
118			}
119
120			$add_class = true;
121			}
122
123			if ( $add_class ) {
124			$replace_html = self::add_class( $replace_html, 'lazyload' );
			0 ignored issues – show Bug introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report The variable `$replace_html` does not seem to be defined for all execution paths leading up to this point. If you define a variable conditionally, it can happen that it is not defined for all execution paths. Let’s take a look at an example: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } // $x is potentially undefined here. echo $x; } In the above example, the variable `$x` is defined if you pass “foo” or “bar” as argument for `$a`. However, since the `switch` statement has no default case statement, if you pass any other value, the variable `$x` would be undefined. Available Fixes Check for existence of the variable explicitly: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } if (isset($x)) { // Make sure it's always set. echo $x; } } Define a default value for the variable: function myFunction($a) { $x = ''; // Set a default which gets overridden for certain paths. switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } echo $x; } Add a value for the missing path: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; // We add support for the missing case. default: $x = ''; break; } echo $x; } Loading history...
125			$replace_html .= '<noscript>' . $img_html . '</noscript>';
126
127			array_push( $search, $img_html );
128			array_push( $replace, $replace_html );
129			}
130			}
131			}
132
133			$content = str_replace( $search, $replace, $content );
134			$content = preg_replace_callback( '~' . chr(20) . '([0-9]+)' . chr(20) . '~', 'self::noscripts_restore', $content );
135			return $content;
136			}
137
138			static function noscripts_remove( $match ) {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
139			self::$noscript_id++;
140			self::$noscripts[self::$noscript_id] = $match[0];
141			return chr(20) . self::$noscript_id . chr(20);
142			}
143
144			static function noscripts_restore( $match ) {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
145			return self::$noscripts[(int) $match[1]];
146			}
147
148			static function add_class( $html_string = '', $new_class ) {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
149			$pattern = '/class=[\'"]([^\'"]*)[\'"]/';
150
151			if ( preg_match( $pattern, $html_string, $matches ) ) {
152			$defined_classes = explode( ' ', $matches[1] );
153
154			if ( ! in_array( $new_class, $defined_classes ) ) {
155			$defined_classes[] = $new_class;
156
157			$html_string = str_replace(
158			$matches[0],
159			sprintf( 'class="%s"', implode( ' ', $defined_classes ) ),
160			$html_string
161			);
162			}
163			} else {
164			$html_string = preg_replace( '/(\<.+\s)/', sprintf( '$1class="%s" ', $new_class ), $html_string );
165			}
166
167			return $html_string;
168			}
169
170			static function is_enabled() {
			0 ignored issues – show Best Practice introduced 2016-09-23 13:06 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
171			return self::$enabled;
172			}
173
174			static function kses_allowed_html( $allowedtags, $context ) {
			0 ignored issues – show Unused Code introduced 2016-10-06 14:03 UTC by Report Bug Copy Issue Report The parameter `$context` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history... Best Practice introduced 2016-10-06 14:03 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
175			$allowedtags['noscript'] = array();
176
177			$allowedtags['img']['data-src'] = true;
178			$allowedtags['img']['data-srcset'] = true;
179			$allowedtags['img']['data-sizes'] = true;
180
181			return $allowedtags;
182			}
183
184			static function kses_allowed_protocols( $allowedprotocols ) {
			0 ignored issues – show Best Practice introduced 2016-10-06 14:03 UTC by Report Bug Copy Issue Report It is generally recommended to explicitly declare the visibility for methods. Adding explicit visibility (`private`, `protected`, or `public`) is generally recommend to communicate to other developers how, and from where this method is intended to be used. Loading history...
185			$allowedprotocols[] = 'data';
186			return $allowedprotocols;
187			}
188			}
189
190			add_action( 'init', array( 'LSX_LazyLoadImages', 'init' ) );
191

lightspeeddevelopment / lsx

Push — master ( fc9d9d...72c4b0 )

LSX_LazyLoadImages::init() A

Complexity

Size

Duplication

Importance

Available Fixes

Duplication Side-by-Side

Filter issues like