Minify::shouldMinifyFully() - Code Metrics - Inspection of "Added an option to skip already minified sources" - matthiasmullie/minify - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#202)

unknown

created 2018-02-11 22:44 UTC

Minify::shouldMinifyFully() A

↳ Parent: Minify

Complexity

Conditions	3
Paths	3

Size

Total Lines	11
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	11
rs	9.4285
c	0
b	0
f	0
cc	3
eloc	6
nc	3
nop	1

<?php
/**
 * Abstract minifier class.
 *
 * Please report bugs on https://github.com/matthiasmullie/minify/issues
 *
 * @author Matthias Mullie <[email protected]>
 * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
 * @license MIT License
 */

namespace MatthiasMullie\Minify;

use MatthiasMullie\Minify\Exceptions\IOException;
use Psr\Cache\CacheItemInterface;

/**
 * Abstract minifier class.
 *
 * Please report bugs on https://github.com/matthiasmullie/minify/issues
 *
 * @author Matthias Mullie <[email protected]>
 * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
 * @license MIT License
 */
abstract class Minify
{
    const LEVEL_AUTODETECT = 0;
    const LEVEL_JOIN = 1;
    const LEVEL_FULL = 2;

    /**
     * The data to be minified.
     *
     * @var string[]
     */
    protected $data = array();

    /**
     * Array of patterns to match.
     *
     * @var string[]
     */
    protected $patterns = array();

    /**
     * This array will hold content of strings and regular expressions that have
     * been extracted from the JS source code, so we can reliably match "code",
     * without having to worry about potential "code-like" characters inside.
     *
     * @var string[]
     */
    public $extracted = array();

    /**
     * One of types above. Minified sources can skip minification for improved speed.
     *
     * @var int
     */
    protected $optimizationLevel = self::LEVEL_AUTODETECT;

    /**
     * Init the minify class - optionally, code may be passed along already.
     */
    public function __construct(/* $data = null, ... */)
    {
        // it's possible to add the source through the constructor as well ;)
        if (func_num_args()) {
            call_user_func_array(array($this, 'add'), func_get_args());
        }
    }

    /**
     * Add a file or straight-up code to be minified.
     *
     * @param string|string[] $data
     *
     * @return static
     */
    public function add($data /* $data = null, ... */)
    {
        // bogus "usage" of parameter $data: scrutinizer warns this variable is
        // not used (we're using func_get_args instead to support overloading),
        // but it still needs to be defined because it makes no sense to have
        // this function without argument :)
        $args = array($data) + func_get_args();

        // this method can be overloaded
        foreach ($args as $data) {
            if (is_array($data)) {
                call_user_func_array(array($this, 'add'), $data);
                continue;
            }

            // redefine var
            $data = (string) $data;

            // load data
            $value = $this->load($data);
            $key = ($data != $value) ? $data : count($this->data);

            // replace CR linefeeds etc.
            // @see https://github.com/matthiasmullie/minify/pull/139
            $value = str_replace(array("\r\n", "\r"), "\n", $value);

            // store data
            $this->data[$key] = $value;
        }

        return $this;
    }

    /**
     * Minify the data & (optionally) saves it to a file.
     *
     * @param string[optional] $path Path to write the data to
     *
     * @return string The minified data
     */
    public function minify($path = null)
    {
        $content = $this->execute($path);

        // save to path
        if ($path !== null) {
            $this->save($content, $path);
        }

        return $content;
    }

    /**
     * Minify & gzip the data & (optionally) saves it to a file.
     *
     * @param string[optional] $path  Path to write the data to
     * @param int[optional]    $level Compression level, from 0 to 9
     *
     * @return string The minified & gzipped data
     */
    public function gzip($path = null, $level = 9)
    {
        $content = $this->execute($path);
        $content = gzencode($content, $level, FORCE_GZIP);

        // save to path
        if ($path !== null) {
            $this->save($content, $path);
        }

        return $content;
    }

    /**
     * Minify the data & write it to a CacheItemInterface object.
     *
     * @param CacheItemInterface $item Cache item to write the data to
     *
     * @return CacheItemInterface Cache item with the minifier data
     */
    public function cache(CacheItemInterface $item)
    {
        $content = $this->execute();
        $item->set($content);

        return $item;
    }

    /**
     * Option setter.
     *
     * @param int $level
     *
     * @return $this
     */
    public function setOptimalizationLevel($level)
    {
        $this->optimizationLevel = $level;

        return $this;
    }

    /**
     * Minify the data.
     *
     * @param string[optional] $path Path to write the data to
     *
     * @return string The minified data
     */
    abstract public function execute($path = null);

    /**
     * Load data.
     *
     * @param string $data Either a path to a file or the content itself
     *
     * @return string
     */
    protected function load($data)
    {
        // check if the data is a file
        if ($this->canImportFile($data)) {
            $data = file_get_contents($data);

            // strip BOM, if any
            if (substr($data, 0, 3) == "\xef\xbb\xbf") {
                $data = substr($data, 3);
            }
        }

        return $data;
    }

    /**
     * Save to file.
     *
     * @param string $content The minified data
     * @param string $path    The path to save the minified data to
     *
     * @throws IOException
     */
    protected function save($content, $path)
    {
        $handler = $this->openFileForWriting($path);

        $this->writeToFile($handler, $content);

        @fclose($handler);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
    }

    /**
     * Register a pattern to execute against the source content.
     *
     * @param string          $pattern     PCRE pattern
     * @param string|callable $replacement Replacement value for matched pattern
     */
    protected function registerPattern($pattern, $replacement = '')
    {
        // study the pattern, we'll execute it more than once
        $pattern .= 'S';

        $this->patterns[] = array($pattern, $replacement);
    }

    /**
     * We can't "just" run some regular expressions against JavaScript: it's a
     * complex language. E.g. having an occurrence of // xyz would be a comment,
     * unless it's used within a string. Of you could have something that looks
     * like a 'string', but inside a comment.
     * The only way to accurately replace these pieces is to traverse the JS one
     * character at a time and try to find whatever starts first.
     *
     * @param string $content The content to replace patterns in
     *
     * @return string The (manipulated) content
     */
    protected function replace($content)
    {
        $processed = '';
        $positions = array_fill(0, count($this->patterns), -1);
        $matches = array();

        while ($content) {
            // find first match for all patterns
            foreach ($this->patterns as $i => $pattern) {
                list($pattern, $replacement) = $pattern;

                // no need to re-run matches that are still in the part of the
                // content that hasn't been processed
                if ($positions[$i] >= 0) {
                    continue;
                }

                $match = null;
                if (preg_match($pattern, $content, $match, PREG_OFFSET_CAPTURE)) {
                    $matches[$i] = $match;

                    // we'll store the match position as well; that way, we
                    // don't have to redo all preg_matches after changing only
                    // the first (we'll still know where those others are)
                    $positions[$i] = $match[0][1];
                } else {
                    // if the pattern couldn't be matched, there's no point in
                    // executing it again in later runs on this same content;
                    // ignore this one until we reach end of content
                    unset($matches[$i]);
                    $positions[$i] = strlen($content);
                }
            }

            // no more matches to find: everything's been processed, break out
            if (!$matches) {

                $processed .= $content;
                break;
            }

            // see which of the patterns actually found the first thing (we'll
            // only want to execute that one, since we're unsure if what the
            // other found was not inside what the first found)
            $discardLength = min($positions);
            $firstPattern = array_search($discardLength, $positions);
            $match = $matches[$firstPattern][0][0];

            // execute the pattern that matches earliest in the content string
            list($pattern, $replacement) = $this->patterns[$firstPattern];
            $replacement = $this->replacePattern($pattern, $replacement, $content);

            // figure out which part of the string was unmatched; that's the
            // part we'll execute the patterns on again next
            $content = (string) substr($content, $discardLength);
            $unmatched = (string) substr($content, strpos($content, $match) + strlen($match));

            // move the replaced part to $processed and prepare $content to
            // again match batch of patterns against
            $processed .= substr($replacement, 0, strlen($replacement) - strlen($unmatched));
            $content = $unmatched;

            // first match has been replaced & that content is to be left alone,
            // the next matches will start after this replacement, so we should
            // fix their offsets
            foreach ($positions as $i => $position) {
                $positions[$i] -= $discardLength + strlen($match);
            }
        }

        return $processed;
    }

    /**
     * This is where a pattern is matched against $content and the matches
     * are replaced by their respective value.
     * This function will be called plenty of times, where $content will always
     * move up 1 character.
     *
     * @param string          $pattern     Pattern to match
     * @param string|callable $replacement Replacement value
     * @param string          $content     Content to match pattern against
     *
     * @return string
     */
    protected function replacePattern($pattern, $replacement, $content)
    {
        if (is_callable($replacement)) {
            return preg_replace_callback($pattern, $replacement, $content, 1, $count);
        } else {
            return preg_replace($pattern, $replacement, $content, 1, $count);
        }
    }

    /**
     * Strings are a pattern we need to match, in order to ignore potential
     * code-like content inside them, but we just want all of the string
     * content to remain untouched.
     *
     * This method will replace all string content with simple STRING#
     * placeholder text, so we've rid all strings from characters that may be
     * misinterpreted. Original string content will be saved in $this->extracted
     * and after doing all other minifying, we can restore the original content
     * via restoreStrings().
     *
     * @param string[optional] $chars
     * @param string[optional] $placeholderPrefix
     */
    protected function extractStrings($chars = '\'"', $placeholderPrefix = '')
    {
        // PHP only supports $this inside anonymous functions since 5.4
        $minifier = $this;
        $callback = function ($match) use ($minifier, $placeholderPrefix) {
            // check the second index here, because the first always contains a quote
            if ($match[2] === '') {
                /*
                 * Empty strings need no placeholder; they can't be confused for
                 * anything else anyway.
                 * But we still needed to match them, for the extraction routine
                 * to skip over this particular string.
                 */
                return $match[0];
            }

            $count = count($minifier->extracted);
            $placeholder = $match[1].$placeholderPrefix.$count.$match[1];
            $minifier->extracted[$placeholder] = $match[1].$match[2].$match[1];

            return $placeholder;
        };

        /*
         * The \\ messiness explained:
         * * Don't count ' or " as end-of-string if it's escaped (has backslash
         * in front of it)
         * * Unless... that backslash itself is escaped (another leading slash),
         * in which case it's no longer escaping the ' or "
         * * So there can be either no backslash, or an even number
         * * multiply all of that times 4, to account for the escaping that has
         * to be done to pass the backslash into the PHP string without it being
         * considered as escape-char (times 2) and to get it in the regex,
         * escaped (times 2)
         */
        $this->registerPattern('/(['.$chars.'])(.*?(?<!\\\\)(\\\\\\\\)*+)\\1/s', $callback);
    }

    /**
     * This method will restore all extracted data (strings, regexes) that were
     * replaced with placeholder text in extract*(). The original content was
     * saved in $this->extracted.
     *
     * @param string $content
     *
     * @return string
     */
    protected function restoreExtractedData($content)
    {
        if (!$this->extracted) {

            // nothing was extracted, nothing to restore
            return $content;
        }

        $content = strtr($content, $this->extracted);

        $this->extracted = array();

        return $content;
    }

    /**
     * Check if the path is a regular file and can be read.
     *
     * @param string $path
     *
     * @return bool
     */
    protected function canImportFile($path)
    {
        $parsed = parse_url($path);
        if (
            // file is elsewhere
            isset($parsed['host']) ||
            // file responds to queries (may change, or need to bypass cache)
            isset($parsed['query'])
        ) {
            return false;
        }

        return strlen($path) < PHP_MAXPATHLEN && @is_file($path) && is_readable($path);
    }

    /**
     * Attempts to open file specified by $path for writing.
     *
     * @param string $path The path to the file
     *
     * @return resource Specifier for the target file
     *
     * @throws IOException
     */
    protected function openFileForWriting($path)
    {
        if (($handler = @fopen($path, 'w')) === false) {
            throw new IOException('The file "'.$path.'" could not be opened for writing. Check if PHP has enough permissions.');
        }

        return $handler;
    }

    /**
     * Attempts to write $content to the file specified by $handler. $path is used for printing exceptions.
     *
     * @param resource $handler The resource to write to
     * @param string   $content The content to write
     * @param string   $path    The path to the file (for exception printing only)
     *
     * @throws IOException
     */
    protected function writeToFile($handler, $content, $path = '')
    {
        if (($result = @fwrite($handler, $content)) === false || ($result < strlen($content))) {
            throw new IOException('The file "'.$path.'" could not be written to. Check your disk space and file permissions.');
        }
    }

    /**
     * @param string $sourceFilename
     *
     * @return bool
     */
    protected function shouldMinifyFully($sourceFilename)
    {
        if ($this->optimizationLevel === self::LEVEL_JOIN) {
            return false;
        }
        if ($this->optimizationLevel === self::LEVEL_FULL) {
            return true;
        }

        return !preg_match('~[\.-]min\.~', $sourceFilename);
    }
}


1			<?php
2			/**
3			* Abstract minifier class.
4			*
5			* Please report bugs on https://github.com/matthiasmullie/minify/issues
6			*
7			* @author Matthias Mullie <[email protected]>
8			* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
9			* @license MIT License
10			*/
11
12			namespace MatthiasMullie\Minify;
13
14			use MatthiasMullie\Minify\Exceptions\IOException;
15			use Psr\Cache\CacheItemInterface;
16
17			/**
18			* Abstract minifier class.
19			*
20			* Please report bugs on https://github.com/matthiasmullie/minify/issues
21			*
22			* @author Matthias Mullie <[email protected]>
23			* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
24			* @license MIT License
25			*/
26			abstract class Minify
27			{
28			const LEVEL_AUTODETECT = 0;
29			const LEVEL_JOIN = 1;
30			const LEVEL_FULL = 2;
31
32			/**
33			* The data to be minified.
34			*
35			* @var string[]
36			*/
37			protected $data = array();
38
39			/**
40			* Array of patterns to match.
41			*
42			* @var string[]
43			*/
44			protected $patterns = array();
45
46			/**
47			* This array will hold content of strings and regular expressions that have
48			* been extracted from the JS source code, so we can reliably match "code",
49			* without having to worry about potential "code-like" characters inside.
50			*
51			* @var string[]
52			*/
53			public $extracted = array();
54
55			/**
56			* One of types above. Minified sources can skip minification for improved speed.
57			*
58			* @var int
59			*/
60			protected $optimizationLevel = self::LEVEL_AUTODETECT;
61
62			/**
63			* Init the minify class - optionally, code may be passed along already.
64			*/
65			public function __construct(/* $data = null, ... */)
66			{
67			// it's possible to add the source through the constructor as well ;)
68			if (func_num_args()) {
69			call_user_func_array(array($this, 'add'), func_get_args());
70			}
71			}
72
73			/**
74			* Add a file or straight-up code to be minified.
75			*
76			* @param string\|string[] $data
77			*
78			* @return static
79			*/
80			public function add($data /* $data = null, ... */)
81			{
82			// bogus "usage" of parameter $data: scrutinizer warns this variable is
83			// not used (we're using func_get_args instead to support overloading),
84			// but it still needs to be defined because it makes no sense to have
85			// this function without argument :)
86			$args = array($data) + func_get_args();
87
88			// this method can be overloaded
89			foreach ($args as $data) {
90			if (is_array($data)) {
91			call_user_func_array(array($this, 'add'), $data);
92			continue;
93			}
94
95			// redefine var
96			$data = (string) $data;
97
98			// load data
99			$value = $this->load($data);
100			$key = ($data != $value) ? $data : count($this->data);
101
102			// replace CR linefeeds etc.
103			// @see https://github.com/matthiasmullie/minify/pull/139
104			$value = str_replace(array("\r\n", "\r"), "\n", $value);
105
106			// store data
107			$this->data[$key] = $value;
108			}
109
110			return $this;
111			}
112
113			/**
114			* Minify the data & (optionally) saves it to a file.
115			*
116			* @param string[optional] $path Path to write the data to
117			*
118			* @return string The minified data
119			*/
120			public function minify($path = null)
121			{
122			$content = $this->execute($path);
123
124			// save to path
125			if ($path !== null) {
126			$this->save($content, $path);
127			}
128
129			return $content;
130			}
131
132			/**
133			* Minify & gzip the data & (optionally) saves it to a file.
134			*
135			* @param string[optional] $path Path to write the data to
136			* @param int[optional] $level Compression level, from 0 to 9
137			*
138			* @return string The minified & gzipped data
139			*/
140			public function gzip($path = null, $level = 9)
141			{
142			$content = $this->execute($path);
143			$content = gzencode($content, $level, FORCE_GZIP);
144
145			// save to path
146			if ($path !== null) {
147			$this->save($content, $path);
148			}
149
150			return $content;
151			}
152
153			/**
154			* Minify the data & write it to a CacheItemInterface object.
155			*
156			* @param CacheItemInterface $item Cache item to write the data to
157			*
158			* @return CacheItemInterface Cache item with the minifier data
159			*/
160			public function cache(CacheItemInterface $item)
161			{
162			$content = $this->execute();
163			$item->set($content);
164
165			return $item;
166			}
167
168			/**
169			* Option setter.
170			*
171			* @param int $level
172			*
173			* @return $this
174			*/
175			public function setOptimalizationLevel($level)
176			{
177			$this->optimizationLevel = $level;
178
179			return $this;
180			}
181
182			/**
183			* Minify the data.
184			*
185			* @param string[optional] $path Path to write the data to
186			*
187			* @return string The minified data
188			*/
189			abstract public function execute($path = null);
190
191			/**
192			* Load data.
193			*
194			* @param string $data Either a path to a file or the content itself
195			*
196			* @return string
197			*/
198			protected function load($data)
199			{
200			// check if the data is a file
201			if ($this->canImportFile($data)) {
202			$data = file_get_contents($data);
203
204			// strip BOM, if any
205			if (substr($data, 0, 3) == "\xef\xbb\xbf") {
206			$data = substr($data, 3);
207			}
208			}
209
210			return $data;
211			}
212
213			/**
214			* Save to file.
215			*
216			* @param string $content The minified data
217			* @param string $path The path to save the minified data to
218			*
219			* @throws IOException
220			*/
221			protected function save($content, $path)
222			{
223			$handler = $this->openFileForWriting($path);
224
225			$this->writeToFile($handler, $content);
226
227			@fclose($handler);
			0 ignored issues – show Security Best Practice introduced 2015-12-17 21:43 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
228			}
229
230			/**
231			* Register a pattern to execute against the source content.
232			*
233			* @param string $pattern PCRE pattern
234			* @param string\|callable $replacement Replacement value for matched pattern
235			*/
236			protected function registerPattern($pattern, $replacement = '')
237			{
238			// study the pattern, we'll execute it more than once
239			$pattern .= 'S';
240
241			$this->patterns[] = array($pattern, $replacement);
242			}
243
244			/**
245			* We can't "just" run some regular expressions against JavaScript: it's a
246			* complex language. E.g. having an occurrence of // xyz would be a comment,
247			* unless it's used within a string. Of you could have something that looks
248			* like a 'string', but inside a comment.
249			* The only way to accurately replace these pieces is to traverse the JS one
250			* character at a time and try to find whatever starts first.
251			*
252			* @param string $content The content to replace patterns in
253			*
254			* @return string The (manipulated) content
255			*/
256			protected function replace($content)
257			{
258			$processed = '';
259			$positions = array_fill(0, count($this->patterns), -1);
260			$matches = array();
261
262			while ($content) {
263			// find first match for all patterns
264			foreach ($this->patterns as $i => $pattern) {
265			list($pattern, $replacement) = $pattern;
266
267			// no need to re-run matches that are still in the part of the
268			// content that hasn't been processed
269			if ($positions[$i] >= 0) {
270			continue;
271			}
272
273			$match = null;
274			if (preg_match($pattern, $content, $match, PREG_OFFSET_CAPTURE)) {
275			$matches[$i] = $match;
276
277			// we'll store the match position as well; that way, we
278			// don't have to redo all preg_matches after changing only
279			// the first (we'll still know where those others are)
280			$positions[$i] = $match[0][1];
281			} else {
282			// if the pattern couldn't be matched, there's no point in
283			// executing it again in later runs on this same content;
284			// ignore this one until we reach end of content
285			unset($matches[$i]);
286			$positions[$i] = strlen($content);
287			}
288			}
289
290			// no more matches to find: everything's been processed, break out
291			if (!$matches) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-17 21:43 UTC by Report Bug Copy Issue Report The expression `$matches` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
292			$processed .= $content;
293			break;
294			}
295
296			// see which of the patterns actually found the first thing (we'll
297			// only want to execute that one, since we're unsure if what the
298			// other found was not inside what the first found)
299			$discardLength = min($positions);
300			$firstPattern = array_search($discardLength, $positions);
301			$match = $matches[$firstPattern][0][0];
302
303			// execute the pattern that matches earliest in the content string
304			list($pattern, $replacement) = $this->patterns[$firstPattern];
305			$replacement = $this->replacePattern($pattern, $replacement, $content);
306
307			// figure out which part of the string was unmatched; that's the
308			// part we'll execute the patterns on again next
309			$content = (string) substr($content, $discardLength);
310			$unmatched = (string) substr($content, strpos($content, $match) + strlen($match));
311
312			// move the replaced part to $processed and prepare $content to
313			// again match batch of patterns against
314			$processed .= substr($replacement, 0, strlen($replacement) - strlen($unmatched));
315			$content = $unmatched;
316
317			// first match has been replaced & that content is to be left alone,
318			// the next matches will start after this replacement, so we should
319			// fix their offsets
320			foreach ($positions as $i => $position) {
321			$positions[$i] -= $discardLength + strlen($match);
322			}
323			}
324
325			return $processed;
326			}
327
328			/**
329			* This is where a pattern is matched against $content and the matches
330			* are replaced by their respective value.
331			* This function will be called plenty of times, where $content will always
332			* move up 1 character.
333			*
334			* @param string $pattern Pattern to match
335			* @param string\|callable $replacement Replacement value
336			* @param string $content Content to match pattern against
337			*
338			* @return string
339			*/
340			protected function replacePattern($pattern, $replacement, $content)
341			{
342			if (is_callable($replacement)) {
343			return preg_replace_callback($pattern, $replacement, $content, 1, $count);
344			} else {
345			return preg_replace($pattern, $replacement, $content, 1, $count);
346			}
347			}
348
349			/**
350			* Strings are a pattern we need to match, in order to ignore potential
351			* code-like content inside them, but we just want all of the string
352			* content to remain untouched.
353			*
354			* This method will replace all string content with simple STRING#
355			* placeholder text, so we've rid all strings from characters that may be
356			* misinterpreted. Original string content will be saved in $this->extracted
357			* and after doing all other minifying, we can restore the original content
358			* via restoreStrings().
359			*
360			* @param string[optional] $chars
361			* @param string[optional] $placeholderPrefix
362			*/
363			protected function extractStrings($chars = '\'"', $placeholderPrefix = '')
364			{
365			// PHP only supports $this inside anonymous functions since 5.4
366			$minifier = $this;
367			$callback = function ($match) use ($minifier, $placeholderPrefix) {
368			// check the second index here, because the first always contains a quote
369			if ($match[2] === '') {
370			/*
371			* Empty strings need no placeholder; they can't be confused for
372			* anything else anyway.
373			* But we still needed to match them, for the extraction routine
374			* to skip over this particular string.
375			*/
376			return $match[0];
377			}
378
379			$count = count($minifier->extracted);
380			$placeholder = $match[1].$placeholderPrefix.$count.$match[1];
381			$minifier->extracted[$placeholder] = $match[1].$match[2].$match[1];
382
383			return $placeholder;
384			};
385
386			/*
387			* The \\ messiness explained:
388			* * Don't count ' or " as end-of-string if it's escaped (has backslash
389			* in front of it)
390			* * Unless... that backslash itself is escaped (another leading slash),
391			* in which case it's no longer escaping the ' or "
392			* * So there can be either no backslash, or an even number
393			* * multiply all of that times 4, to account for the escaping that has
394			* to be done to pass the backslash into the PHP string without it being
395			* considered as escape-char (times 2) and to get it in the regex,
396			* escaped (times 2)
397			*/
398			$this->registerPattern('/(['.$chars.'])(.?(?<!\\\\)(\\\\\\\\)+)\\1/s', $callback);
399			}
400
401			/**
402			* This method will restore all extracted data (strings, regexes) that were
403			* replaced with placeholder text in extract*(). The original content was
404			* saved in $this->extracted.
405			*
406			* @param string $content
407			*
408			* @return string
409			*/
410			protected function restoreExtractedData($content)
411			{
412			if (!$this->extracted) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-17 21:43 UTC by Report Bug Copy Issue Report The expression `$this->extracted` of type `string[]` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
413			// nothing was extracted, nothing to restore
414			return $content;
415			}
416
417			$content = strtr($content, $this->extracted);
418
419			$this->extracted = array();
420
421			return $content;
422			}
423
424			/**
425			* Check if the path is a regular file and can be read.
426			*
427			* @param string $path
428			*
429			* @return bool
430			*/
431			protected function canImportFile($path)
432			{
433			$parsed = parse_url($path);
434			if (
435			// file is elsewhere
436			isset($parsed['host']) \|\|
437			// file responds to queries (may change, or need to bypass cache)
438			isset($parsed['query'])
439			) {
440			return false;
441			}
442
443			return strlen($path) < PHP_MAXPATHLEN && @is_file($path) && is_readable($path);
444			}
445
446			/**
447			* Attempts to open file specified by $path for writing.
448			*
449			* @param string $path The path to the file
450			*
451			* @return resource Specifier for the target file
452			*
453			* @throws IOException
454			*/
455			protected function openFileForWriting($path)
456			{
457			if (($handler = @fopen($path, 'w')) === false) {
458			throw new IOException('The file "'.$path.'" could not be opened for writing. Check if PHP has enough permissions.');
459			}
460
461			return $handler;
462			}
463
464			/**
465			* Attempts to write $content to the file specified by $handler. $path is used for printing exceptions.
466			*
467			* @param resource $handler The resource to write to
468			* @param string $content The content to write
469			* @param string $path The path to the file (for exception printing only)
470			*
471			* @throws IOException
472			*/
473			protected function writeToFile($handler, $content, $path = '')
474			{
475			if (($result = @fwrite($handler, $content)) === false \|\| ($result < strlen($content))) {
476			throw new IOException('The file "'.$path.'" could not be written to. Check your disk space and file permissions.');
477			}
478			}
479
480			/**
481			* @param string $sourceFilename
482			*
483			* @return bool
484			*/
485			protected function shouldMinifyFully($sourceFilename)
486			{
487			if ($this->optimizationLevel === self::LEVEL_JOIN) {
488			return false;
489			}
490			if ($this->optimizationLevel === self::LEVEL_FULL) {
491			return true;
492			}
493
494			return !preg_match('~[\.-]min\.~', $sourceFilename);
495			}
496			}
497

matthiasmullie / minify

Pull Request — master (#202)

Minify::shouldMinifyFully() A

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