Assets_processing::absolute_path() - Code Metrics - Inspection of "Nested CSS imports are now also processed even if..." - nazar-pc/CleverStyle-Framework - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( ad19ae...1ab7e1 )

by Nazar

created 2016-12-14 01:33 UTC

Assets_processing::absolute_path() A

↳ Parent: Assets_processing

Complexity

Conditions	2
Paths	2

Size

Total Lines	6
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
eloc	4
nc	2
nop	2
dl	0
loc	6
ccs	4
cts	4
cp	1
crap	2
rs	9.4285
c	0
b	0
f	0

<?php
/**
 * @package   CleverStyle Framework
 * @author    Nazar Mokrynskyi <[email protected]>
 * @copyright Copyright (c) 2014-2016, Nazar Mokrynskyi
 * @license   MIT License, see license.txt
 */
namespace cs\Page;

/**
 * Class includes few methods used for processing CSS, JS and HTML files before putting into cache
 *
 * This is because CSS and HTML files may include other CSS, JS files, images, fonts and so on with absolute and relative paths.
 * Methods of this class handle all this assets, applies basic minification to CSS and JS files and produce single resulting file (relative paths to
 * files that can't be embedded are converted to absolute). This allows to decrease number of HTTP requests on page and avoid breaking of relative paths for
 * fonts, images and other assets after putting them into cache directory as well as minimize contents size by removing comments and other redundant stuff.
 */
class Assets_processing {
	/**
	 * Do not inline files bigger than 4 KiB
	 */
	const MAX_EMBEDDING_SIZE = 4096;
	protected static $extension_to_mime = [
		'jpeg' => 'image/jpg',
		'jpe'  => 'image/jpg',
		'jpg'  => 'image/jpg',
		'gif'  => 'image/gif',
		'png'  => 'image/png',
		'svg'  => 'image/svg+xml',
		'svgz' => 'image/svg+xml',
		'woff' => 'application/font-woff',
		//'woff2' => 'application/font-woff2'
	];
	/**
	 * Analyses file for images, fonts and css links and include they content into single resulting css file.
	 *
	 * Supports next file extensions for possible assets:
	 * jpeg, jpe, jpg, gif, png, ttf, ttc, svg, svgz, woff, css
	 *
	 * @param string   $data                   Content of processed file
	 * @param string   $file                   Path to file, that contains specified in previous parameter content
	 * @param string   $target_directory_path  Target directory for resulting combined files
	 * @param string[] $not_embedded_resources Some resources like images and fonts might not be embedded into resulting CSS because of their size
	 *
	 * @return string    $data
	 */
	public static function css ($data, $file, $target_directory_path = PUBLIC_CACHE, &$not_embedded_resources = []) {
		$dir = dirname($file);
		/**
		 * Remove comments, tabs and new lines
		 */
		$data = preg_replace('#(/\*.*?\*/)|\t|\n|\r#s', ' ', $data);
		/**
		 * Remove unnecessary spaces
		 */
		$data = preg_replace('/\s*([,;>{}(])\s*/', '$1', $data);
		$data = preg_replace('/\s+/', ' ', $data);
		/**
		 * Return spaces required in media queries
		 */
		$data = preg_replace('/\s(and|or)\(/', ' $1 (', $data);
		/**
		 * Duplicated semicolons
		 */
		$data = preg_replace('/;+/m', ';', $data);
		/**
		 * Minify rgb colors declarations
		 */
		$data = preg_replace_callback(
			'/rgb\(([0-9,.]+)\)/i',
			function ($rgb) {
				$rgb = explode(',', $rgb[1]);
				return
					'#'.
					str_pad(dechex($rgb[0]), 2, 0, STR_PAD_LEFT).
					str_pad(dechex($rgb[1]), 2, 0, STR_PAD_LEFT).
					str_pad(dechex($rgb[2]), 2, 0, STR_PAD_LEFT);
			},
			$data
		);
		/**
		 * Minify repeated colors declarations
		 */
		$data = preg_replace('/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', '#$1$2$3', $data);
		/**
		 * Remove unnecessary zeros
		 */
		$data = preg_replace('/(\D)0\.(\d+)/i', '$1.$2', $data);
		/**
		 * Unnecessary spaces around colons (should have whitespace character after, otherwise might be `.c :disabled` and will be handled incorrectly)
		 */
		$data = preg_replace('/\s*:\s+/', ':', $data);
		/**
		 * Assets processing
		 */
		// TODO: replace by loop, track duplicated stuff that are subject to inlining and if they appear more than once, don't inline them
		$data = preg_replace_callback(
			'/url\((.*)\)|@import\s*(?:url\()?\s*([\'"].*[\'"])\s*\)??(.*);/U',
			function ($match) use ($dir, $target_directory_path, &$not_embedded_resources) {
				$path_matched = @$match[2] ?: $match[1];
				$path         = trim($path_matched, '\'" ');
				$link         = explode('?', $path, 2)[0];
				if (!static::is_relative_path_and_exists($link, $dir)) {
					return $match[0];
				}
				$extension     = file_extension($link);
				$absolute_path = static::absolute_path($link, $dir);
				$content       = file_get_contents($absolute_path);
				if ($extension == 'css' && @$match[2]) {
					/**
					 * Only inline CSS imports without media queries, imports with media queries will be placed as separate files
					 */
					if (!trim(@$match[3])) {
						return static::css($content, $absolute_path, $target_directory_path, $not_embedded_resources);
					} else {
						$filename = static::file_put_contents_with_hash(
							$target_directory_path,
							$extension,
							static::css($content, $absolute_path, $target_directory_path)
						);
						return str_replace($path_matched, "'./$filename'", $match[0]);
					}
				}
				if (!isset(static::$extension_to_mime[$extension])) {
					$filename = static::file_put_contents_with_hash($target_directory_path, $extension, $content);
					return str_replace($path_matched, "'./$filename'", $match[0]);
				}
				if (filesize($absolute_path) > static::MAX_EMBEDDING_SIZE) {
					$filename = static::file_put_contents_with_hash($target_directory_path, $extension, $content);
					if (strpos($path, '?') === false) {
						$not_embedded_resources[] = str_replace(getcwd(), '', "$target_directory_path/$filename");
					}
					return str_replace($path_matched, "'./$filename'", $match[0]);
				}
				$mime_type = static::$extension_to_mime[$extension];
				$content   = base64_encode($content);
				return str_replace($path, "data:$mime_type;charset=utf-8;base64,$content", $match[0]);
			},
			$data
		);
		return trim($data);
	}
	/**
	 * Put `$content` into `$dir` where filename is `md5($content)` with specified extension
	 *
	 * @param string $dir
	 * @param string $extension
	 * @param string $content
	 *
	 * @return string Filename (without full path)
	 */
	protected static function file_put_contents_with_hash ($dir, $extension, $content) {
		$hash = md5($content);
		file_put_contents("$dir/$hash.$extension", $content, LOCK_EX | FILE_BINARY);
		return "$hash.$extension";
	}
	/**
	 * Simple and fast JS minification
	 *
	 * @param string $data
	 *
	 * @return string
	 */
	public static function js ($data) {
		/**
		 * Split into array of lines
		 */
		$data = explode("\n", $data);
		/**
		 * Flag that is `true` when inside comment
		 */
		$in_comment              = false;
		$continue_after_position = -1;
		foreach ($data as $index => &$current_line) {
			if ($continue_after_position >= $index) {
				continue;
			}
			$next_line = isset($data[$index + 1]) ? trim($data[$index + 1]) : '';
			/**
			 * Remove starting and trailing spaces
			 */
			$current_line = trim($current_line);
			/**
			 * Remove single-line comments
			 */
			if (mb_strpos($current_line, '//') === 0) {
				$current_line = '';
				continue;
			}
			/**
			 * Starts with multi-line comment
			 */
			if (mb_strpos($current_line, '/*') === 0) {
				$in_comment = true;
			}
			if (!$in_comment) {
				$backticks_position = strpos($current_line, '`');
				/**
				 * Handling template strings can be tricky (since they might be multi-line), so let's fast-forward to the last backticks position and continue
				 * from there
				 */
				if ($backticks_position !== false) {
					$last_item_with_backticks = array_keys(
						array_filter(
							$data,
							function ($d) {
								return strpos($d, '`') !== false;
							}
						)
					);
					$last_item_with_backticks = array_pop($last_item_with_backticks);
					if ($last_item_with_backticks > $index) {
						$continue_after_position = $last_item_with_backticks;
						continue;
					}
				}
				/**
				 * Add new line at the end if only needed
				 */
				if (static::new_line_needed($current_line, $next_line)) {
					$current_line .= "\n";
				}
				/**
				 * Single-line comment
				 */
				$current_line = preg_replace('#^\s*//[^\'"]+$#', '', $current_line);
				/**
				 * If we are not sure - just add new line afterwards
				 */
				$current_line = preg_replace('#//.*$#', "\\0\n", $current_line);
			} else {
				/**
				 * End of multi-line comment
				 */
				if (strpos($current_line, '*/') !== false) {
					$current_line = explode('*/', $current_line)[1];
					$in_comment   = false;
				} else {
					$current_line = '';
				}
			}
		}
		$data = implode('', $data);
		$data = str_replace('</script>', '<\/script>', $data);
		return trim($data, ';').';';
	}
	/**
	 * @param string $current_line
	 * @param string $next_line
	 *
	 * @return bool
	 */
	protected static function new_line_needed ($current_line, $next_line) {
		/**
		 * Set of symbols that are safe to be concatenated without new line with anything else
		 */
		$regexp = /** @lang PhpRegExp */
			'[:;,.+\-*/{}?><^\'"\[\]=&(]';
		return
			$current_line &&
			$next_line &&
			!preg_match("#$regexp\$#", $current_line) &&
			!preg_match("#^$regexp#", $next_line);
	}
	/**
	 * Analyses file for scripts and styles, combines them into resulting files in order to optimize loading process
	 * (files with combined scripts and styles will be created)
	 *
	 * @param string   $data                   Content of processed file
	 * @param string   $file                   Path to file, that contains specified in previous parameter content
	 * @param string   $target_directory_path  Target directory for resulting combined files
	 * @param bool     $vulcanization          Whether to put combined files separately or to make included assets built-in (vulcanization)
	 * @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP
	 *
	 * @return string
	 */
	public static function html ($data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources = []) {
		static::html_process_links_and_styles($data, $file, $target_directory_path, $vulcanization, $not_embedded_resources);
		static::html_process_scripts($data, $file, $target_directory_path, $vulcanization, $not_embedded_resources);
		// Removing HTML comments (those that are mostly likely comments, to avoid problems)
		$data = preg_replace_callback(
			'/^\s*<!--([^>-].*[^-])?-->/Ums',
			function ($matches) {
				return mb_strpos('--', $matches[1]) === false ? '' : $matches[0];
			},
			$data
		);
		return preg_replace("/\n+/", "\n", $data);
	}
	/**
	 * @param string   $data                   Content of processed file
	 * @param string   $file                   Path to file, that contains specified in previous parameter content
	 * @param string   $target_directory_path  Target directory for resulting combined files
	 * @param bool     $vulcanization          Whether to put combined files separately or to make included assets built-in (vulcanization)
	 * @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP
	 */
	protected static function html_process_scripts (&$data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources) {
		if (!preg_match_all('/<script(.*)<\/script>/Uims', $data, $scripts)) {
			return;
		}
		$scripts_content    = '';
		$scripts_to_replace = [];
		$dir                = dirname($file);
		foreach ($scripts[1] as $index => $script) {
			$script = explode('>', $script, 2);
			if (preg_match('/src\s*=\s*[\'"](.*)[\'"]/Uims', $script[0], $url)) {
				$url = $url[1];
				if (!static::is_relative_path_and_exists($url, $dir)) {
					continue;
				}
				$scripts_to_replace[] = $scripts[0][$index];
				$scripts_content .= file_get_contents("$dir/$url").";\n";
			} else {
				$scripts_to_replace[] = $scripts[0][$index];
				$scripts_content .= "$script[1];\n";
			}
		}
		$scripts_content = static::js($scripts_content);
		if (!$scripts_to_replace) {
			return;
		}
		// Remove all scripts
		$data = str_replace($scripts_to_replace, '', $data);
		/**
		 * If vulcanization is not used - put contents into separate file, and put link to it, otherwise put minified content back
		 */
		if (!$vulcanization) {
			// TODO: Remove in 7.x; For backward compatibility, since some modules might use this by specifying file path
			if (!is_dir($target_directory_path)) {
				$target_directory_path = dirname($target_directory_path);
			}
			$filename = static::file_put_contents_with_hash($target_directory_path, 'js', $scripts_content);
			// Add script with combined content file to the end
			$data .= "<script src=\"./$filename\"></script>";
			$not_embedded_resources[] = str_replace(getcwd(), '', "$target_directory_path/$filename");
		} else {
			// Add combined content inline script to the end
			$data .= "<script>$scripts_content</script>";
		}
	}
	/**
	 * @param string   $data                   Content of processed file
	 * @param string   $file                   Path to file, that contains specified in previous parameter content
	 * @param string   $target_directory_path  Target directory for resulting combined files
	 * @param bool     $vulcanization          Whether to put combined files separately or to make included assets built-in (vulcanization)
	 * @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP
	 */
	protected static function html_process_links_and_styles (&$data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources) {
		// Drop Polymer inclusion, since it is already present
		$data = str_replace('<link rel="import" href="../polymer/polymer.html">', '', $data);
		if (!preg_match_all('/<link(.*)>|<style(.*)<\/style>/Uims', $data, $links_and_styles)) {
			return;
		}
		$dir = dirname($file);
		foreach ($links_and_styles[1] as $index => $link) {
			/**
			 * Check for custom styles `is="custom-style"` or styles includes `include=".."` - we'll skip them
			 * Or if content is plain CSS
			 */
			if (
				preg_match('/^[^>]*(is="custom-style"|include=)[^>]*>/Uim', $links_and_styles[2][$index]) ||
				mb_strpos($links_and_styles[0][$index], '</style>') > 0
			) {
				$content = explode('>', $links_and_styles[2][$index], 2)[1];
				$data    = str_replace(
					$content,
					static::css($content, $file, $target_directory_path, $not_embedded_resources),
					$data
				);
				continue;
			}
			if (!static::has_relative_href($link, $url, $dir)) {
				continue;
			}
			$import = preg_match('/rel\s*=\s*[\'"]import[\'"]/Uim', $link);
			/**
			 * CSS imports are available in Polymer alongside with HTML imports
			 */
			$css_import = $import && preg_match('/type\s*=\s*[\'"]css[\'"]/Uim', $link);
			$stylesheet = preg_match('/rel\s*=\s*[\'"]stylesheet[\'"]/Uim', $link);
			// TODO: Polymer only supports `style[is=custom-style]`, but no `link`-based counterpart, so we can't provide CSP-compatibility for CSS anyway
			if ($css_import || $stylesheet) {
				/**
				 * If content is link to CSS file
				 */
				$css  = static::css(
					file_get_contents("$dir/$url"),
					"$dir/$url",
					$target_directory_path,
					$not_embedded_resources
				);
				$data = preg_replace(
					'/'.$links_and_styles[0][$index].'.*<template>/Uims',
					"<template><style>$css</style>",
					$data
				);
			} elseif ($import) {
				/**
				 * If content is HTML import
				 */
				$data = str_replace(
					$links_and_styles[0][$index],
					static::html(
						file_get_contents("$dir/$url"),
						"$dir/$url",
						$target_directory_path,
						$vulcanization,
						$not_embedded_resources
					),
					$data
				);
			}
		}
	}
	/**
	 * @param string $link
	 * @param string $url
	 * @param string $dir
	 *
	 * @return bool
	 */
	protected static function has_relative_href ($link, &$url, $dir) {
		$result =
			$link &&
			preg_match('/href\s*=\s*[\'"](.*)[\'"]/Uims', $link, $url);
		if ($result && static::is_relative_path_and_exists($url[1], $dir)) {
			$url = $url[1];
			return true;
		}
		return false;
	}
	/**
	 * @param string $path
	 * @param string $dir
	 *
	 * @return bool
	 */
	protected static function is_relative_path_and_exists ($path, $dir) {
		return $dir && !preg_match('#^https?://#i', $path) && file_exists(static::absolute_path($path, $dir));
	}
	/**
	 * @param string $path
	 * @param string $dir
	 *
	 * @return string
	 */
	protected static function absolute_path ($path, $dir) {
		if (strpos($path, '/') === 0) {
			return realpath(getcwd().$path);
		}
		return realpath("$dir/$path");
	}
}


1		<?php
2		/**
3		* @package CleverStyle Framework
4		* @author Nazar Mokrynskyi <[email protected]>
5		* @copyright Copyright (c) 2014-2016, Nazar Mokrynskyi
6		* @license MIT License, see license.txt
7		*/
8		namespace cs\Page;
9
10		/**
11		* Class includes few methods used for processing CSS, JS and HTML files before putting into cache
12		*
13		* This is because CSS and HTML files may include other CSS, JS files, images, fonts and so on with absolute and relative paths.
14		* Methods of this class handle all this assets, applies basic minification to CSS and JS files and produce single resulting file (relative paths to
15		* files that can't be embedded are converted to absolute). This allows to decrease number of HTTP requests on page and avoid breaking of relative paths for
16		* fonts, images and other assets after putting them into cache directory as well as minimize contents size by removing comments and other redundant stuff.
17		*/
18		class Assets_processing {
19		/**
20		* Do not inline files bigger than 4 KiB
21		*/
22		const MAX_EMBEDDING_SIZE = 4096;
23		protected static $extension_to_mime = [
24		'jpeg' => 'image/jpg',
25		'jpe' => 'image/jpg',
26		'jpg' => 'image/jpg',
27		'gif' => 'image/gif',
28		'png' => 'image/png',
29		'svg' => 'image/svg+xml',
30		'svgz' => 'image/svg+xml',
31		'woff' => 'application/font-woff',
32		//'woff2' => 'application/font-woff2'
33		];
34		/**
35		* Analyses file for images, fonts and css links and include they content into single resulting css file.
36		*
37		* Supports next file extensions for possible assets:
38		* jpeg, jpe, jpg, gif, png, ttf, ttc, svg, svgz, woff, css
39		*
40		* @param string $data Content of processed file
41		* @param string $file Path to file, that contains specified in previous parameter content
42		* @param string $target_directory_path Target directory for resulting combined files
43		* @param string[] $not_embedded_resources Some resources like images and fonts might not be embedded into resulting CSS because of their size
44		*
45		* @return string $data
46		*/
47	10	public static function css ($data, $file, $target_directory_path = PUBLIC_CACHE, &$not_embedded_resources = []) {
48	10	$dir = dirname($file);
49		/**
50		* Remove comments, tabs and new lines
51		*/
52	10	$data = preg_replace('#(/\.?\*/)\|\t\|\n\|\r#s', ' ', $data);
53		/**
54		* Remove unnecessary spaces
55		*/
56	10	$data = preg_replace('/\s([,;>{}(])\s/', '$1', $data);
57	10	$data = preg_replace('/\s+/', ' ', $data);
58		/**
59		* Return spaces required in media queries
60		*/
61	10	$data = preg_replace('/\s(and\|or)\(/', ' $1 (', $data);
62		/**
63		* Duplicated semicolons
64		*/
65	10	$data = preg_replace('/;+/m', ';', $data);
66		/**
67		* Minify rgb colors declarations
68		*/
69	10	$data = preg_replace_callback(
70	10	'/rgb\(([0-9,.]+)\)/i',
71		function ($rgb) {
72	6	$rgb = explode(',', $rgb[1]);
73		return
74		'#'.
75	6	str_pad(dechex($rgb[0]), 2, 0, STR_PAD_LEFT).
76	6	str_pad(dechex($rgb[1]), 2, 0, STR_PAD_LEFT).
77	6	str_pad(dechex($rgb[2]), 2, 0, STR_PAD_LEFT);
78	10	},
79		$data
80		);
81		/**
82		* Minify repeated colors declarations
83		*/
84	10	$data = preg_replace('/#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3/i', '#$1$2$3', $data);
85		/**
86		* Remove unnecessary zeros
87		*/
88	10	$data = preg_replace('/(\D)0\.(\d+)/i', '$1.$2', $data);
89		/**
90		* Unnecessary spaces around colons (should have whitespace character after, otherwise might be `.c :disabled` and will be handled incorrectly)
91		*/
92	10	$data = preg_replace('/\s*:\s+/', ':', $data);
93		/**
94		* Assets processing
95		*/
96		// TODO: replace by loop, track duplicated stuff that are subject to inlining and if they appear more than once, don't inline them
97	10	$data = preg_replace_callback(
98	10	'/url\((.)\)\|@import\s(?:url\()?\s([\'"].[\'"])\s\)??(.);/U',
99		function ($match) use ($dir, $target_directory_path, &$not_embedded_resources) {
100	10	$path_matched = @$match[2] ?: $match[1];
101	10	$path = trim($path_matched, '\'" ');
102	10	$link = explode('?', $path, 2)[0];
103	10	if (!static::is_relative_path_and_exists($link, $dir)) {
104	4	return $match[0];
105		}
106	10	$extension = file_extension($link);
107	10	$absolute_path = static::absolute_path($link, $dir);
108	10	$content = file_get_contents($absolute_path);
109	10	if ($extension == 'css' && @$match[2]) {
110		/**
111		* Only inline CSS imports without media queries, imports with media queries will be placed as separate files
112		*/
113	6	if (!trim(@$match[3])) {
114	6	return static::css($content, $absolute_path, $target_directory_path, $not_embedded_resources);
115		} else {
116	6	$filename = static::file_put_contents_with_hash(
117		$target_directory_path,
118		$extension,
119	6	static::css($content, $absolute_path, $target_directory_path)
120		);
121	6	return str_replace($path_matched, "'./$filename'", $match[0]);
122		}
123		}
124	10	if (!isset(static::$extension_to_mime[$extension])) {
125		$filename = static::file_put_contents_with_hash($target_directory_path, $extension, $content);
126		return str_replace($path_matched, "'./$filename'", $match[0]);
127		}
128	10	if (filesize($absolute_path) > static::MAX_EMBEDDING_SIZE) {
129	10	$filename = static::file_put_contents_with_hash($target_directory_path, $extension, $content);
130	10	if (strpos($path, '?') === false) {
131	6	$not_embedded_resources[] = str_replace(getcwd(), '', "$target_directory_path/$filename");
132		}
133	10	return str_replace($path_matched, "'./$filename'", $match[0]);
134		}
135	6	$mime_type = static::$extension_to_mime[$extension];
136	6	$content = base64_encode($content);
137	6	return str_replace($path, "data:$mime_type;charset=utf-8;base64,$content", $match[0]);
138	10	},
139		$data
140		);
141	10	return trim($data);
142		}
143		/**
144		* Put `$content` into `$dir` where filename is `md5($content)` with specified extension
145		*
146		* @param string $dir
147		* @param string $extension
148		* @param string $content
149		*
150		* @return string Filename (without full path)
151		*/
152	10	protected static function file_put_contents_with_hash ($dir, $extension, $content) {
153	10	$hash = md5($content);
154	10	file_put_contents("$dir/$hash.$extension", $content, LOCK_EX \| FILE_BINARY);
155	10	return "$hash.$extension";
156		}
157		/**
158		* Simple and fast JS minification
159		*
160		* @param string $data
161		*
162		* @return string
163		*/
164	10	public static function js ($data) {
165		/**
166		* Split into array of lines
167		*/
168	10	$data = explode("\n", $data);
169		/**
170		* Flag that is `true` when inside comment
171		*/
172	10	$in_comment = false;
173	10	$continue_after_position = -1;
174	10	foreach ($data as $index => &$current_line) {
175	10	if ($continue_after_position >= $index) {
176	6	continue;
177		}
178	10	$next_line = isset($data[$index + 1]) ? trim($data[$index + 1]) : '';
179		/**
180		* Remove starting and trailing spaces
181		*/
182	10	$current_line = trim($current_line);
183		/**
184		* Remove single-line comments
185		*/
186	10	if (mb_strpos($current_line, '//') === 0) {
187	10	$current_line = '';
188	10	continue;
189		}
190		/**
191		* Starts with multi-line comment
192		*/
193	10	if (mb_strpos($current_line, '/*') === 0) {
194	10	$in_comment = true;
195		}
196	10	if (!$in_comment) {
197	10	$backticks_position = strpos($current_line, '`');
198		/**
199		* Handling template strings can be tricky (since they might be multi-line), so let's fast-forward to the last backticks position and continue
200		* from there
201		*/
202	10	if ($backticks_position !== false) {
203	6	$last_item_with_backticks = array_keys(
204		array_filter(
205		$data,
206		function ($d) {
207	6	return strpos($d, '`') !== false;
208	6	}
209		)
210		);
211	6	$last_item_with_backticks = array_pop($last_item_with_backticks);
212	6	if ($last_item_with_backticks > $index) {
213	6	$continue_after_position = $last_item_with_backticks;
214	6	continue;
215		}
216		}
217		/**
218		* Add new line at the end if only needed
219		*/
220	10	if (static::new_line_needed($current_line, $next_line)) {
221	10	$current_line .= "\n";
222		}
223		/**
224		* Single-line comment
225		*/
226	10	$current_line = preg_replace('#^\s*//[^\'"]+$#', '', $current_line);
227		/**
228		* If we are not sure - just add new line afterwards
229		*/
230	10	$current_line = preg_replace('#//.*$#', "\\0\n", $current_line);
231		} else {
232		/**
233		* End of multi-line comment
234		*/
235	10	if (strpos($current_line, '*/') !== false) {
236	10	$current_line = explode('*/', $current_line)[1];
237	10	$in_comment = false;
238		} else {
239	10	$current_line = '';
240		}
241		}
242		}
243	10	$data = implode('', $data);
244	10	$data = str_replace('</script>', '<\/script>', $data);
245	10	return trim($data, ';').';';
246		}
247		/**
248		* @param string $current_line
249		* @param string $next_line
250		*
251		* @return bool
252		*/
253	10	protected static function new_line_needed ($current_line, $next_line) {
254		/**
255		* Set of symbols that are safe to be concatenated without new line with anything else
256		*/
257		$regexp = /** @lang PhpRegExp */
258	10	'[:;,.+\-*/{}?><^\'"\[\]=&(]';
259		return
260	10	$current_line &&
261	10	$next_line &&
262	10	!preg_match("#$regexp\$#", $current_line) &&
263	10	!preg_match("#^$regexp#", $next_line);
264		}
265		/**
266		* Analyses file for scripts and styles, combines them into resulting files in order to optimize loading process
267		* (files with combined scripts and styles will be created)
268		*
269		* @param string $data Content of processed file
270		* @param string $file Path to file, that contains specified in previous parameter content
271		* @param string $target_directory_path Target directory for resulting combined files
272		* @param bool $vulcanization Whether to put combined files separately or to make included assets built-in (vulcanization)
273		* @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP
274		*
275		* @return string
276		*/
277	8	public static function html ($data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources = []) {
278	8	static::html_process_links_and_styles($data, $file, $target_directory_path, $vulcanization, $not_embedded_resources);
279	8	static::html_process_scripts($data, $file, $target_directory_path, $vulcanization, $not_embedded_resources);
280		// Removing HTML comments (those that are mostly likely comments, to avoid problems)
281	8	$data = preg_replace_callback(
282	8	'/^\s<!--([^>-].[^-])?-->/Ums',
283	8	function ($matches) {
284	8	return mb_strpos('--', $matches[1]) === false ? '' : $matches[0];
285	8	},
286		$data
287		);
288	8	return preg_replace("/\n+/", "\n", $data);
289		}
290		/**
291		* @param string $data Content of processed file
292		* @param string $file Path to file, that contains specified in previous parameter content
293		* @param string $target_directory_path Target directory for resulting combined files
294		* @param bool $vulcanization Whether to put combined files separately or to make included assets built-in (vulcanization)
295		* @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP
296		*/
297	8	protected static function html_process_scripts (&$data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources) {
298	8	if (!preg_match_all('/<script(.*)<\/script>/Uims', $data, $scripts)) {
299	8	return;
300		}
301	8	$scripts_content = '';
302	8	$scripts_to_replace = [];
303	8	$dir = dirname($file);
304	8	foreach ($scripts[1] as $index => $script) {
305	8	$script = explode('>', $script, 2);
306	8	if (preg_match('/src\s=\s[\'"](.*)[\'"]/Uims', $script[0], $url)) {
307	8	$url = $url[1];
308	8	if (!static::is_relative_path_and_exists($url, $dir)) {
309	4	continue;
310		}
311	8	$scripts_to_replace[] = $scripts[0][$index];
312	8	$scripts_content .= file_get_contents("$dir/$url").";\n";
313		} else {
314	8	$scripts_to_replace[] = $scripts[0][$index];
315	8	$scripts_content .= "$script[1];\n";
316		}
317		}
318	8	$scripts_content = static::js($scripts_content);
319	8	if (!$scripts_to_replace) {
320	4	return;
321		}
322		// Remove all scripts
323	8	$data = str_replace($scripts_to_replace, '', $data);
324		/**
325		* If vulcanization is not used - put contents into separate file, and put link to it, otherwise put minified content back
326		*/
327	8	if (!$vulcanization) {
328		// TODO: Remove in 7.x; For backward compatibility, since some modules might use this by specifying file path
329	2	if (!is_dir($target_directory_path)) {
330		$target_directory_path = dirname($target_directory_path);
331		}
332	2	$filename = static::file_put_contents_with_hash($target_directory_path, 'js', $scripts_content);
333		// Add script with combined content file to the end
334	2	$data .= "<script src=\"./$filename\"></script>";
335	2	$not_embedded_resources[] = str_replace(getcwd(), '', "$target_directory_path/$filename");
336		} else {
337		// Add combined content inline script to the end
338	6	$data .= "<script>$scripts_content</script>";
339		}
340	8	}
341		/**
342		* @param string $data Content of processed file
343		* @param string $file Path to file, that contains specified in previous parameter content
344		* @param string $target_directory_path Target directory for resulting combined files
345		* @param bool $vulcanization Whether to put combined files separately or to make included assets built-in (vulcanization)
346		* @param string[] $not_embedded_resources Resources like images/fonts might not be embedded into resulting CSS because of big size or CSS/JS because of CSP
347		*/
348	8	protected static function html_process_links_and_styles (&$data, $file, $target_directory_path, $vulcanization, &$not_embedded_resources) {
349		// Drop Polymer inclusion, since it is already present
350	8	$data = str_replace('<link rel="import" href="../polymer/polymer.html">', '', $data);
351	8	if (!preg_match_all('/<link(.)>\|<style(.)<\/style>/Uims', $data, $links_and_styles)) {
352	8	return;
353		}
354	8	$dir = dirname($file);
355	8	foreach ($links_and_styles[1] as $index => $link) {
356		/**
357		* Check for custom styles `is="custom-style"` or styles includes `include=".."` - we'll skip them
358		* Or if content is plain CSS
359		*/
360		if (
361	8	preg_match('/^[^>](is="custom-style"\|include=)[^>]>/Uim', $links_and_styles[2][$index]) \|\|
362	8	mb_strpos($links_and_styles[0][$index], '</style>') > 0
363		) {
364	8	$content = explode('>', $links_and_styles[2][$index], 2)[1];
365	8	$data = str_replace(
366		$content,
367	8	static::css($content, $file, $target_directory_path, $not_embedded_resources),
368		$data
369		);
370	8	continue;
371		}
372	8	if (!static::has_relative_href($link, $url, $dir)) {
373	4	continue;
374		}
375	8	$import = preg_match('/rel\s=\s[\'"]import[\'"]/Uim', $link);
376		/**
377		* CSS imports are available in Polymer alongside with HTML imports
378		*/
379	8	$css_import = $import && preg_match('/type\s=\s[\'"]css[\'"]/Uim', $link);
380	8	$stylesheet = preg_match('/rel\s=\s[\'"]stylesheet[\'"]/Uim', $link);
381		// TODO: Polymer only supports `style[is=custom-style]`, but no `link`-based counterpart, so we can't provide CSP-compatibility for CSS anyway
382	8	if ($css_import \|\| $stylesheet) {
383		/**
384		* If content is link to CSS file
385		*/
386	8	$css = static::css(
387	8	file_get_contents("$dir/$url"),
388	8	"$dir/$url",
389		$target_directory_path,
390		$not_embedded_resources
391		);
392	8	$data = preg_replace(
393	8	'/'.$links_and_styles[0][$index].'.*<template>/Uims',
394	8	"<template><style>$css</style>",
395		$data
396		);
397	4	} elseif ($import) {
398		/**
399		* If content is HTML import
400		*/
401	4	$data = str_replace(
402	4	$links_and_styles[0][$index],
403	4	static::html(
404	4	file_get_contents("$dir/$url"),
405	8	"$dir/$url",
406		$target_directory_path,
407		$vulcanization,
408		$not_embedded_resources
409		),
410		$data
411		);
412		}
413		}
414	8	}
415		/**
416		* @param string $link
417		* @param string $url
418		* @param string $dir
419		*
420		* @return bool
421		*/
422	8	protected static function has_relative_href ($link, &$url, $dir) {
423		$result =
424	8	$link &&
425	8	preg_match('/href\s=\s[\'"](.*)[\'"]/Uims', $link, $url);
426	8	if ($result && static::is_relative_path_and_exists($url[1], $dir)) {
427	8	$url = $url[1];
428	8	return true;
429		}
430	4	return false;
431		}
432		/**
433		* @param string $path
434		* @param string $dir
435		*
436		* @return bool
437		*/
438	10	protected static function is_relative_path_and_exists ($path, $dir) {
439	10	return $dir && !preg_match('#^https?://#i', $path) && file_exists(static::absolute_path($path, $dir));
440		}
441		/**
442		* @param string $path
443		* @param string $dir
444		*
445		* @return string
446		*/
447	10	protected static function absolute_path ($path, $dir) {
448	10	if (strpos($path, '/') === 0) {
449	6	return realpath(getcwd().$path);
450		}
451	10	return realpath("$dir/$path");
452		}
453		}
454

nazar-pc / CleverStyle-Framework

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