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Component-Builder/admin/helpers/js.php

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first commit of free version
2016-01-30 20:28:43 +00:00
<?php
/*--------------------------------------------------------------------------------------------------------| www.vdm.io |------/
__ __ _ _____ _ _ __ __ _ _ _
\ \ / / | | | __ \ | | | | | \/ | | | | | | |
\ \ / /_ _ ___| |_ | | | | _____ _____| | ___ _ __ _ __ ___ ___ _ __ | |_ | \ / | ___| |_| |__ ___ __| |
\ \/ / _` / __| __| | | | |/ _ \ \ / / _ \ |/ _ \| '_ \| '_ ` _ \ / _ \ '_ \| __| | |\/| |/ _ \ __| '_ \ / _ \ / _` |
\ / (_| \__ \ |_ | |__| | __/\ V / __/ | (_) | |_) | | | | | | __/ | | | |_ | | | | __/ |_| | | | (_) | (_| |
\/ \__,_|___/\__| |_____/ \___| \_/ \___|_|\___/| .__/|_| |_| |_|\___|_| |_|\__| |_| |_|\___|\__|_| |_|\___/ \__,_|
| |
|_|
/-------------------------------------------------------------------------------------------------------------------------------/
Added #39 a new feature the imports custom code during compilation. We also improved the compiler.
2017-02-01 13:17:04 +00:00
@version 2.2.9
Bug fixes, error on compilation when using view date & version was fixed, headercheck file missing was fixed. Added swithces to controle custom import placeholders and if view version and date should be used
2017-02-02 11:54:07 +00:00
@build 2nd February, 2017
first commit of free version
2016-01-30 20:28:43 +00:00
@created 30th April, 2015
@package Component Builder
@subpackage js.php
added dynamic email helper fields to the global settings of all components that use the email helper class
2016-12-22 21:32:13 +00:00
@author Llewellyn van der Merwe <http://vdm.bz/component-builder>
first commit of free version
2016-01-30 20:28:43 +00:00
@copyright Copyright (C) 2015. All Rights Reserved
@license GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
Builds Complex Joomla Components
/-----------------------------------------------------------------------------------------------------------------------------*/
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
require_once JPATH_ADMINISTRATOR.'/components/com_componentbuilder/helpers/minify.php';
/**
* JavaScript minifier.
*
* Please report bugs on https://github.com/matthiasmullie/minify/issues
*
* @author Matthias Mullie <minify@mullie.eu>
* @author Tijs Verkoyen <minify@verkoyen.eu>
*
* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved.
* @license MIT License
*/
class JS extends Minify
{
/**
* Var-matching regex based on http://stackoverflow.com/a/9337047/802993
*
* Note that regular expressions using that bit must have the PCRE_UTF8
* pattern modifier (/u) set.
*
* @var string
*/
const REGEX_VARIABLE = '\b[$A-Z\_a-z\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\x{02c1}\x{02c6}-\x{02d1}\x{02e0}-\x{02e4}\x{02ec}\x{02ee}\x{0370}-\x{0374}\x{0376}\x{0377}\x{037a}-\x{037d}\x{0386}\x{0388}-\x{038a}\x{038c}\x{038e}-\x{03a1}\x{03a3}-\x{03f5}\x{03f7}-\x{0481}\x{048a}-\x{0527}\x{0531}-\x{0556}\x{0559}\x{0561}-\x{0587}\x{05d0}-\x{05ea}\x{05f0}-\x{05f2}\x{0620}-\x{064a}\x{066e}\x{066f}\x{0671}-\x{06d3}\x{06d5}\x{06e5}\x{06e6}\x{06ee}\x{06ef}\x{06fa}-\x{06fc}\x{06ff}\x{0710}\x{0712}-\x{072f}\x{074d}-\x{07a5}\x{07b1}\x{07ca}-\x{07ea}\x{07f4}\x{07f5}\x{07fa}\x{0800}-\x{0815}\x{081a}\x{0824}\x{0828}\x{0840}-\x{0858}\x{08a0}\x{08a2}-\x{08ac}\x{0904}-\x{0939}\x{093d}\x{0950}\x{0958}-\x{0961}\x{0971}-\x{0977}\x{0979}-\x{097f}\x{0985}-\x{098c}\x{098f}\x{0990}\x{0993}-\x{09a8}\x{09aa}-\x{09b0}\x{09b2}\x{09b6}-\x{09b9}\x{09bd}\x{09ce}\x{09dc}\x{09dd}\x{09df}-\x{09e1}\x{09f0}\x{09f1}\x{0a05}-\x{0a0a}\x{0a0f}\x{0a10}\x{0a13}-\x{0a28}\x{0a2a}-\x{0a30}\x{0a32}\x{0a33}\x{0a35}\x{0a36}\x{0a38}\x{0a39}\x{0a59}-\x{0a5c}\x{0a5e}\x{0a72}-\x{0a74}\x{0a85}-\x{0a8d}\x{0a8f}-\x{0a91}\x{0a93}-\x{0aa8}\x{0aaa}-\x{0ab0}\x{0ab2}\x{0ab3}\x{0ab5}-\x{0ab9}\x{0abd}\x{0ad0}\x{0ae0}\x{0ae1}\x{0b05}-\x{0b0c}\x{0b0f}\x{0b10}\x{0b13}-\x{0b28}\x{0b2a}-\x{0b30}\x{0b32}\x{0b33}\x{0b35}-\x{0b39}\x{0b3d}\x{0b5c}\x{0b5d}\x{0b5f}-\x{0b61}\x{0b71}\x{0b83}\x{0b85}-\x{0b8a}\x{0b8e}-\x{0b90}\x{0b92}-\x{0b95}\x{0b99}\x{0b9a}\x{0b9c}\x{0b9e}\x{0b9f}\x{0ba3}\x{0ba4}\x{0ba8}-\x{0baa}\x{0bae}-\x{0bb9}\x{0bd0}\x{0c05}-\x{0c0c}\x{0c0e}-\x{0c10}\x{0c12}-\x{0c28}\x{0c2a}-\x{0c33}\x{0c35}-\x{0c39}\x{0c3d}\x{0c58}\x{0c59}\x{0c60}\x{0c61}\x{0c85}-\x{0c8c}\x{0c8e}-\x{0c90}\x{0c92}-\x{0ca8}\x{0caa}-\x{0cb3}\x{0cb5}-\x{0cb9}\x{0cbd}\x{0cde}\x{0ce0}\x{0ce1}\x{0cf1}\x{0cf2}\x{0d05}-\x{0d0c}\x{0d0e}-\x{0d10}\x{0d12}-\x{0d3a}\x{0d3d}\x{0d4e}\x{0d60}\x{0d61}\x{0d7a}-\x{0d7f}\x{0d85}-\x{0d96}\x{0d9a}-\x{0db1}\x{0db3}-\x{0dbb}\x{0dbd}\x{0dc0}-\x{0dc6}\x{0e01}-\x{0e30}\x{0e32}\x{0e33}\x{0e40}-\x{0e46}\x{0e81}\x{0e82}\x{0e84}\x{0e87}\x{0e88}\x{0e8a}\x{0e8d}\x{0e94}-\x{0e97}\x{0e99}-\x{0e9f}\x{0ea1}-\x{0ea3}\x{0ea5}\x{0ea7}\x{0eaa}\x{0eab}\x{0ead}-\x{0eb0}\x{0eb2}\x{0eb3}\x{0ebd}\x{0ec0}-\x{0ec4}\x{0ec6}\x{0edc}-\x{0edf}\x{0f00}\x{0f40}-\x{0f47}\x{0f49}-\x{0f6c}\x{0f88}-\x{0f8c}\x{1000}-\x{102a}\x{103f}\x{1050}-\x{1055}\x{105a}-\x{105d}\x{1061}\x{1065}\x{1066}\x{106e}-\x{1070}\x{1075}-\x{1081}\x{108e}\x{10a0}-\x{10c5}\x{10c7}\x{10cd}\x{10d0}-\x{10fa}\x{10fc}-\x{1248}\x{124a}-\x{124d}\x{1250}-\x{1256}\x{1258}\x{125a}-\x{125d}\x{1260}-\x{1288}\x{128a}-\x{128d}\x{1290}-\x{12b0}\x{12b2}-\x{12b5}\x{12b8}-\x{12be}\x{12c0}\x{12c2}-\x{12c5}\x{12c8}-\x{12d6}\x{12d8}-\x{1310}\x{1312}-\x{1315}\x{1318}-\x{135a}\x{1380}-\x{138f}\x{13a0}-\x{13f4}\x{1401}-\x{166c}\x{166f}-\x{167f}\x{1681}-\x{169a}\x{16a0}-\x{16ea}\x{16ee}-\x{16f0}\x{1700}-\x{170c}\x{170e}-\x{1711}\x{1720}-\x{1731}\x{1740}-\x{1751}\x{1760}-\x{176c}\x{176e}-\x{1770}\x{1780}-\x{17b3}\x{17d7}\x{17dc}\x{1820}-\x{1877}\x{1880}-\x{18a8}\x{18aa}\x{18b0}-\x{18f5}\x{1900}-\x{191c}\x{1950}-\x{196d}\x{1970}-\x{1974}\x{1980}-\x{19ab}\x{19c1}-\x{19c7}\x{1a00}-\x{1a16}\x{1a20}-\x{1a54}\x{1aa7}\x{1b05}-\x{1b33}\x{1b45}-\x{1b4b}\x{1b83}-\x{1ba0}\x{1bae}\x{1baf}\x{1bba}-\x{1be5}\x{1c00}-\x{1c23}\x{1c4d}-\x{1c4f}\x{1c5a}-\x{1c7d}\x{1ce9}-\x{1cec}\x{1cee}-\x{1cf1}\x{1cf5}\x{1cf6}\x{1d00}-\x{1dbf}\x{1e00}-\x{1f15}\x{1f18}-\x{1f1d}\x{1f20}-\x{1f45}\x{1f48}-\x{1f4d}\x{1f50}-\x{1f57}\x{1f59}\x{1f5b}\x{1f5d}\x{1f5f}-\x{1f7d}\x{1f80}-\x{1fb4}\x{1fb6}-\x{1fbc}\x{1fbe}\x{1fc2}-\x{1fc4}\x{1fc6}-\x{1fcc}\x{1fd0}-\x{1fd3}\x{1fd6}-\x{1fdb}\x{1fe0}-\x{1fec}\x{1ff2}-\x{1ff4}\x{1ff6}-\x{1ffc}\x{2071}\x{207f}\x{2090}-\x{209c}\x{2102}\x{2107}\x{210a}-\x{2113}\x{2115}\x{2119}-\x{211d}\x{2124}\x{2126}\x{2128}\x{212a}-\x{212d}\x{212f}-\x{2139}\x{213c}-\x{213f}\x{2145}-\x{2149}\x{214e}\x{2160}-\x{2188}\x{2c00}-\x{2c2e}\x{2c30}-\x{2c5e}\x{2c60}-\x{2ce4}\x{2ceb}-\x{2cee}\x{2cf2}\x{2cf3}\x{2d00}-\x{2d25}\x{2d27}\x{2d2d}\x{2d30}-\x{2d67}\x{2d6f}\x{2d80}-\x{2d96}\x{2da0}-\x{2da6}\x{2da8}-\x{2dae}\x{2db0}-\x{2db6}\x{2db8}-\x{2dbe}\x{2dc0}-\x{2dc6}\x{2dc8}-\x{2dce}\x{2dd0}-\x{2dd6}
/**
* Full list of JavaScript reserved words.
* Will be loaded from /data/js/keywords_reserved.txt
*
* @see https://mathiasbynens.be/notes/reserved-keywords
* @var string[]
*/
protected $keywordsReserved = array();
/**
* List of JavaScript reserved words that accept a <variable, value, ...>
* after them. Some end of lines are not the end of a statement, like with
* these keywords.
*
* E.g.: we shouldn't insert a ; after this else
* else
* console.log('this is quite fine')
*
* Will be loaded from /data/js/keywords_before.txt
*
* @var string[]
*/
protected $keywordsBefore = array();
/**
* List of JavaScript reserved words that accept a <variable, value, ...>
* before them. Some end of lines are not the end of a statement, like when
* continued by one of these keywords on the newline.
*
* E.g.: we shouldn't insert a ; before this instanceof
* variable
* instanceof String
*
* Will be loaded from /data/js/keywords_after.txt
*
* @var string[]
*/
protected $keywordsAfter = array();
/**
* List of JavaScript operators that accept a <variable, value, ...> after
* them. Some end of lines are not the end of a statement, like with these
* operators.
*
* Note: Most operators are fine, we've only removed !, ++ and --.
* There can't be a newline separating ! and whatever it is negating.
* ++ & -- have to be joined with the value they're in-/decrementing.
*
* Will be loaded from /data/js/operators_before.txt
*
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators
* @var string[]
*/
protected $operatorsBefore = array();
/**
* List of JavaScript operators that accept a <variable, value, ...> before
* them. Some end of lines are not the end of a statement, like when
* continued by one of these operators on the newline.
*
* Note: Most operators are fine, we've only removed ), ], ++ and --.
* ++ & -- have to be joined with the value they're in-/decrementing.
* ) & ] are "special" in that they have lots or usecases. () for example
* is used for function calls, for grouping, in if () and for (), ...
*
* Will be loaded from /data/js/operators_after.txt
*
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators
* @var string[]
*/
protected $operatorsAfter = array();
/**
* {@inheritDoc}
*/
public function __construct()
{
call_user_func_array(array('parent', '__construct'), func_get_args());
$dataDir = JPATH_ADMINISTRATOR.'/components/com_componentbuilder/helpers/';
$options = FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES;
$this->keywordsReserved = file($dataDir.'keywords_reserved.txt', $options);
$this->keywordsBefore = file($dataDir.'keywords_before.txt', $options);
$this->keywordsAfter = file($dataDir.'keywords_after.txt', $options);
$this->operatorsBefore = file($dataDir.'operators_before.txt', $options);
$this->operatorsAfter = file($dataDir.'operators_after.txt', $options);
}
/**
* Minify the data.
* Perform JS optimizations.
*
* @param string[optional] $path Path to write the data to.
* @return string The minified data.
*/
public function execute($path = null)
{
$content = '';
// loop files
foreach ($this->data as $source => $js) {
/*
* Combine js: separating the scripts by a ;
* I'm also adding a newline: it will be eaten when whitespace is
* stripped, but we need to make sure we're not just appending
* a new script right after a previous script that ended with a
* singe-line comment on the last line (in which case it would also
* be seen as part of that comment)
*/
$content .= $js."\n;";
}
/*
* Let's first take out strings, comments and regular expressions.
* All of these can contain JS code-like characters, and we should make
* sure any further magic ignores anything inside of these.
*
* Consider this example, where we should not strip any whitespace:
* var str = "a test";
*
* Comments will be removed altogether, strings and regular expressions
* will be replaced by placeholder text, which we'll restore later.
*/
$this->extractStrings('\'"`');
$this->stripComments();
$this->extractRegex();
$content = $this->replace($content);
$content = $this->stripWhitespace($content);
$content = $this->propertyNotation($content);
$content = $this->shortenBools($content);
/*
* Earlier, we extracted strings & regular expressions and replaced them
* with placeholder text. This will restore them.
*/
$content = $this->restoreExtractedData($content);
return $content;
}
/**
* Strip comments from source code.
*/
protected function stripComments()
{
// single-line comments
$this->registerPattern('/\/\/.*$/m', '');
// multi-line comments
$this->registerPattern('/\/\*.*?\*\//s', '');
}
/**
* JS can have /-delimited regular expressions, like: /ab+c/.match(string)
*
* The content inside the regex can contain characters that may be confused
* for JS code: e.g. it could contain whitespace it needs to match & we
* don't want to strip whitespace in there.
*
* The regex can be pretty simple: we don't have to care about comments,
* (which also use slashes) because stripComments() will have stripped those
* already.
*
* This method will replace all string content with simple REGEX#
* placeholder text, so we've rid all regular expressions from characters
* that may be misinterpreted. Original regex content will be saved in
* $this->extracted and after doing all other minifying, we can restore the
* original content via restoreRegex()
*/
protected function extractRegex()
{
// PHP only supports $this inside anonymous functions since 5.4
$minifier = $this;
$callback = function ($match) use ($minifier) {
$count = count($minifier->extracted);
$placeholder = '/'.$count.'/';
$minifier->extracted[$placeholder] = '/'.$match[1].'/';
return $placeholder;
};
// it's a regex if we can find an opening (not preceded by variable,
// value or similar) & (non-escaped) closing /,
$before = $this->getOperatorsForRegex($this->operatorsBefore, '/');
$this->registerPattern('/^\s*+\K\/(.*?(?<!\\\\)(\\\\\\\\)*+)\//', $callback);
$this->registerPattern('/(?:'.implode('|', $before).')\s*+\K\/(.*?(?<!\\\\)(\\\\\\\\)*+)\//', $callback);
}
/**
* Strip whitespace.
*
* We won't strip *all* whitespace, but as much as possible. The thing that
* we'll preserve are newlines we're unsure about.
* JavaScript doesn't require statements to be terminated with a semicolon.
* It will automatically fix missing semicolons with ASI (automatic semi-
* colon insertion) at the end of line causing errors (without semicolon.)
*
* Because it's sometimes hard to tell if a newline is part of a statement
* that should be terminated or not, we'll just leave some of them alone.
*
* @param string $content The content to strip the whitespace for.
* @return string
*/
protected function stripWhitespace($content)
{
// uniform line endings, make them all line feed
$content = str_replace(array("\r\n", "\r"), "\n", $content);
// collapse all non-line feed whitespace into a single space
$content = preg_replace('/[^\S\n]+/', ' ', $content);
// strip leading & trailing whitespace
$content = str_replace(array(" \n", "\n "), "\n", $content);
// collapse consecutive line feeds into just 1
$content = preg_replace('/\n+/', "\n", $content);
// strip whitespace that ends in (or next line begin with) an operator
// that allows statements to be broken up over multiple lines
$before = $this->getOperatorsForRegex($this->operatorsBefore, '/');
$after = $this->getOperatorsForRegex($this->operatorsAfter, '/');
$content = preg_replace('/('.implode('|', $before).')\s+/', '\\1', $content);
$content = preg_replace('/\s+('.implode('|', $after).')/', '\\1', $content);
// make sure + and - can't be mistaken for, or joined into ++ and --
$content = preg_replace('/(?<![\+\-])\s*([\+\-])(?![\+\-])/', '\\1', $content);
$content = preg_replace('/(?<![\+\-])([\+\-])\s*(?![\+\-])/', '\\1', $content);
/*
* We didn't strip whitespace after a couple of operators because they
* could be used in different contexts and we can't be sure it's ok to
* strip the newlines. However, we can safely strip any non-line feed
* whitespace that follows them.
*/
$operators = $this->getOperatorsForRegex($this->operatorsBefore + $this->operatorsAfter, '/');
$content = preg_replace('/([\}\)\]])[^\S\n]+(?!'.implode('|', $operators).')/', '\\1', $content);
// collapse whitespace around reserved words into single space
$before = $this->getKeywordsForRegex($this->keywordsBefore, '/');
$after = $this->getKeywordsForRegex($this->keywordsAfter, '/');
$content = preg_replace('/(^|[;\}\s])\K('.implode('|', $before).')\s+/', '\\2 ', $content);
$content = preg_replace('/\s+('.implode('|', $after).')(?=([;\{\s]|$))/', ' \\1', $content);
// get rid of double semicolons, except when followed by closing-),
// where semicolons can be used like: "for(v=1,_=b;;)"
$content = preg_replace('/;+(?!\))/', ';', $content);
/*
* Next, we'll be removing all semicolons where ASI kicks in.
* for-loops however, can have an empty body (ending in only a
* semicolon), like: `for(i=1;i<3;i++);`
* Here, nothing happens during the loop; it's just used to keep
* increasing `i`. With that ; omitted, the next line would be expected
* to be the for-loop's body...
* I'm going to double that semicolon (if any) so after the next line,
* which strips semicolons here & there, we're still left with this one.
*/
$content = preg_replace('/(for\([^;]*;[^;]*;[^;\{]*\));(\}|$)/s', '\\1;;\\2', $content);
/*
* We also don't really want to terminate statements followed by closing
* curly braces (which we've ignored completely up until now) or end-of-
* script: ASI will kick in here & we're all about minifying.
* Semicolons at beginning of the file don't make any sense either.
*/
$content = preg_replace('/;(\}|$)/s', '\\1', $content);
$content = ltrim($content, ';');
// get rid of remaining whitespace af beginning/end
return trim($content);
}
/**
* We'll strip whitespace around certain operators with regular expressions.
* This will prepare the given array by escaping all characters.
*
* @param string[] $operators
* @param string $delimiter
* @return string[]
*/
protected function getOperatorsForRegex(array $operators, $delimiter = '/')
{
// escape operators for use in regex
$delimiter = array_fill(0, count($operators), $delimiter);
$escaped = array_map('preg_quote', $operators, $delimiter);
$operators = array_combine($operators, $escaped);
// ignore + & - for now, they'll get special treatment
unset($operators['+'], $operators['-']);
// dot can not just immediately follow a number; it can be confused for
// decimal point, or calling a method on it, e.g. 42 .toString()
$operators['.'] = '(?<![0-9]\s)\.';
return $operators;
}
/**
* We'll strip whitespace around certain keywords with regular expressions.
* This will prepare the given array by escaping all characters.
*
* @param string[] $keywords
* @param string $delimiter
* @return string[]
*/
protected function getKeywordsForRegex(array $keywords, $delimiter = '/')
{
// escape keywords for use in regex
$delimiter = array_fill(0, count($keywords), $delimiter);
$escaped = array_map('preg_quote', $keywords, $delimiter);
// add word boundaries
array_walk($keywords, function ($value) {
return '\b'.$value.'\b';
});
$keywords = array_combine($keywords, $escaped);
return $keywords;
}
/**
* Replaces all occurrences of array['key'] by array.key
*
* @param string $content
* @return string
*/
protected function propertyNotation($content)
{
// PHP only supports $this inside anonymous functions since 5.4
$minifier = $this;
$keywords = $this->keywordsReserved;
$callback = function ($match) use ($minifier, $keywords) {
$property = trim($minifier->extracted[$match[1]], '\'"');
/*
* Check if the property is a reserved keyword. In this context (as
* property of an object literal/array) it shouldn't matter, but IE8
* freaks out with "Expected identifier".
*/
if (in_array($property, $keywords)) {
return $match[0];
}
/*
* See if the property is in a variable-like format (e.g.
* array['key-here'] can't be replaced by array.key-here since '-'
* is not a valid character there.
*/
if (!preg_match('/^'.$minifier::REGEX_VARIABLE.'$/u', $property)) {
return $match[0];
}
return '.'.$property;
};
/*
* Figure out if previous character is a variable name (of the array
* we want to use property notation on) - this is to make sure
* standalone ['value'] arrays aren't confused for keys-of-an-array.
* We can (and only have to) check the last character, because PHP's
* regex implementation doesn't allow un-fixed-length lookbehind
* assertions.
*/
preg_match('/(\[[^\]]+\])[^\]]*$/', static::REGEX_VARIABLE, $previousChar);
$previousChar = $previousChar[1];
/*
* Make sure word preceding the ['value'] is not a keyword, e.g.
* return['x']. Because -again- PHP's regex implementation doesn't allow
* un-fixed-length lookbehind assertions, I'm just going to do a lot of
* separate lookbehind assertions, one for each keyword.
*/
$keywords = $this->getKeywordsForRegex($keywords);
$keywords = '(?<!'.implode(')(?<!', $keywords).')';
return preg_replace_callback('/(?<='.$previousChar.'|\])'.$keywords.'\[(([\'"])[0-9]+\\2)\]/u', $callback, $content);
}
/**
* Replaces true & false by !0 and !1.
*
* @param string $content
* @return string
*/
protected function shortenBools($content)
{
$content = preg_replace('/\btrue\b/', '!0', $content);
$content = preg_replace('/\bfalse\b/', '!1', $content);
// for(;;) is exactly the same as while(true)
$content = preg_replace('/\bwhile\(!0\)/', 'for(;;)', $content);
return $content;
}
}
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