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HtmlClassUtils.php
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HtmlClassUtils.php
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<?php
namespace MobileFrontend\Transforms\Utils;
/**
* Simple utility for working with html classes as with set
*/
class HtmlClassUtils {
/**
* Parse html class string into set (array of string=>bool) where key is class name
* and values is always true
*
* @param string $classAttr raw `class` attribute's string retrieved from html
*
* @return array
*/
public static function parseClassString( string $classAttr ): array {
$classes = preg_split( '/\s+/', $classAttr, -1, PREG_SPLIT_NO_EMPTY );
return array_fill_keys( $classes, true );
}
/**
* Forms raw html `class` string from set of classes. Set is a key-value array where
* key is class name and value is boolean that determines wheather this class should be
* included to string or not.
*
*
* @param array $classes set of classes that should be formed into string
*
* @return string
*/
public static function formClassString( array $classes ): string {
$enabled = array_filter(
$classes,
static function ( $enabled ) {
return $enabled;
}
);
return implode( ' ', array_keys( $enabled ) );
}
/**
* Filters set of classes by list of allowed classes
*
* @param array $classes key-value array of html classes
* @param string[] $allowedClasses list of allowed classes
* @param string[] $additional list of additional styles should be added in front of list
*
* @return array
*/
public static function filterAllowedClasses( array $classes, array $allowedClasses, array $additional ): array {
return array_fill_keys( $additional, true ) + array_intersect_key(
$classes,
array_fill_keys( $allowedClasses, true )
);
}
}

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HtmlClassUtils.php (1 KB)

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