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<?php
/**
* @package Regular Labs Library
* @version 23.9.3039
*
* @author Peter van Westen <info@regularlabs.com>
* @link https://regularlabs.com
* @copyright Copyright © 2023 Regular Labs All Rights Reserved
* @license GNU General Public License version 2 or later
*/
namespace RegularLabs\Library;
defined('_JEXEC') or die;
use Joomla\String\Normalise as JNormalise;
use Normalizer;
/**
* Class StringHelper
*
* @package RegularLabs\Library
*/
class StringHelper extends \Joomla\String\StringHelper
{
/**
* Adds postfix to a string
*
* @param string $string
* @param string $postfix
*
* @return string
*/
public static function addPostfix($string, $postfix)
{
$array = ArrayHelper::applyMethodToValues([$string, $postfix]);
if ( ! is_null($array))
{
return $array;
}
if (empty($postfix))
{
return $string;
}
if ( ! is_string($string) && ! is_numeric($string))
{
return $string;
}
return $string . $postfix;
}
/**
* Adds prefix to a string
*
* @param string $string
* @param string $prefix
* @param bool $keep_leading_slash
*
* @return string
*/
public static function addPrefix($string, $prefix, $keep_leading_slash = true)
{
$array = ArrayHelper::applyMethodToValues([$string, $prefix, $keep_leading_slash]);
if ( ! is_null($array))
{
return $array;
}
if (empty($prefix))
{
return $string;
}
if ( ! is_string($string) && ! is_numeric($string))
{
return $string;
}
if ($keep_leading_slash && ! empty($string) && $string[0] == '/')
{
return $string[0] . $prefix . substr($string, 1);
}
return $prefix . $string;
}
/**
* @param string $string
* @param bool $to_lowercase
*
* @return string
* @deprecated Use StringHelper::toUnderscoreCase()
*/
public static function camelToUnderscore($string = '', $to_lowercase = true)
{
return self::toUnderscoreCase($string, $to_lowercase);
}
/**
* Check if any of the needles are found in any of the haystacks
*
* @param $haystacks
* @param $needles
*
* @return bool
*/
public static function contains($haystacks, $needles)
{
$haystacks = (array) $haystacks;
$needles = (array) $needles;
foreach ($haystacks as $haystack)
{
foreach ($needles as $needle)
{
if (strpos($haystack, $needle) !== false)
{
return true;
}
}
}
return false;
}
/**
* Converts a string to a UTF-8 encoded string
*
* @param string $string
*
* @return string
*/
public static function convertToUtf8($string = '')
{
$array = ArrayHelper::applyMethodToValues([$string]);
if ( ! is_null($array))
{
return $array;
}
if (self::detectUTF8($string))
{
// Already UTF-8, so skip
return $string;
}
if ( ! function_exists('iconv'))
{
// Still need to find a stable fallback
return $string;
}
$utf8_string = @iconv('UTF8', 'UTF-8//IGNORE', $string);
if (empty($utf8_string))
{
return $string;
}
return $utf8_string;
}
/**
* Check whether string is a UTF-8 encoded string
*
* @param string $string
*
* @return bool
*/
public static function detectUTF8($string = '')
{
// Try to check the string via the mb_check_encoding function
if (function_exists('mb_check_encoding'))
{
return mb_check_encoding($string, 'UTF-8');
}
// Otherwise: Try to check the string via the iconv function
if (function_exists('iconv'))
{
$converted = iconv('UTF-8', 'UTF-8//IGNORE', $string);
return (md5($converted) == md5($string));
}
// As last fallback, check if the preg_match finds anything using the unicode flag
return preg_match('#.#u', $string);
}
/**
* @param string $string
*
* @return string
*/
public static function escape($string)
{
return htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
}
/**
* Decode html entities in string (array of strings)
*
* @param string $string
* @param int $quote_style
* @param string $encoding
*
* @return array|string
*/
public static function html_entity_decoder($string, $quote_style = ENT_QUOTES, $encoding = 'UTF-8')
{
$array = ArrayHelper::applyMethodToValues([$string, $quote_style, $encoding]);
if ( ! is_null($array))
{
return $array;
}
if ( ! is_string($string))
{
return $string;
}
$string = html_entity_decode($string, $quote_style | ENT_HTML5, $encoding);
$string = str_replace(chr(194) . chr(160), ' ', $string);
return $string;
}
/**
* Check if string is alphanumerical
*
* @param string $string
*
* @return bool
*/
public static function is_alphanumeric($string)
{
if (function_exists('ctype_alnum'))
{
return (bool) ctype_alnum($string);
}
return (bool) RegEx::match('^[a-z0-9]+$', $string);
}
/**
* Check if string is a valid key / alias (alphanumeric with optional _ or - chars)
*
* @param string $string
*
* @return bool
*/
public static function is_key($string)
{
return RegEx::match('^[a-z][a-z0-9-_]*$', trim($string));
}
/**
* Normalizes the input provided and returns the normalized string
*
* @param string $string
* @param bool $to_lowercase
*
* @return string
*/
public static function normalize($string, $to_lowercase = false)
{
$array = ArrayHelper::applyMethodToValues([$string, $to_lowercase]);
if ( ! is_null($array))
{
return $array;
}
// Normalizer-class missing!
if (class_exists('Normalizer', $autoload = false))
{
$string = Normalizer::normalize($string);
}
if ( ! $to_lowercase)
{
return $string;
}
return strtolower($string);
}
/**
* Removes html tags from string
*
* @param string $string
* @param bool $remove_comments
*
* @return string
*/
public static function removeHtml($string, $remove_comments = false)
{
$array = ArrayHelper::applyMethodToValues([$string, $remove_comments]);
if ( ! is_null($array))
{
return $array;
}
return Html::removeHtmlTags($string, $remove_comments);
}
/**
* Removes the trailing part of a string if it matches the given $postfix
*
* @param string $string
* @param string $postfix
*
* @return string
*/
public static function removePostfix($string, $postfix)
{
$array = ArrayHelper::applyMethodToValues([$string, $postfix]);
if ( ! is_null($array))
{
return $array;
}
if (empty($string) || empty($postfix))
{
return $string;
}
if ( ! is_string($string) && ! is_numeric($string))
{
return $string;
}
$string_length = strlen($string);
$postfix_length = strlen($postfix);
$start = $string_length - $postfix_length;
if (substr($string, $start) !== $postfix)
{
return $string;
}
return substr($string, 0, $start);
}
/**
* Removes the first part of a string if it matches the given $prefix
*
* @param string $string
* @param string $prefix
* @param bool $keep_leading_slash
*
* @return string
*/
public static function removePrefix($string, $prefix, $keep_leading_slash = true)
{
$array = ArrayHelper::applyMethodToValues([$string, $prefix, $keep_leading_slash]);
if ( ! is_null($array))
{
return $array;
}
if (empty($string) || empty($prefix))
{
return $string;
}
if ( ! is_string($string) && ! is_numeric($string))
{
return $string;
}
$prefix_length = strlen($prefix);
$start = 0;
if (
$keep_leading_slash
&& $prefix[0] !== '/'
&& $string[0] == '/'
)
{
$start = 1;
}
if (substr($string, $start, $prefix_length) !== $prefix)
{
return $string;
}
return substr($string, 0, $start)
. substr($string, $start + $prefix_length);
}
/**
* Replace the given replace string once in the main string
*
* @param string $search
* @param string $replace
* @param string $string
*
* @return string
*/
public static function replaceOnce($search, $replace, $string)
{
if (empty($search) || empty($string))
{
return $string;
}
$pos = strpos($string, $search);
if ($pos === false)
{
return $string;
}
return substr_replace($string, $replace, $pos, strlen($search));
}
/**
* Split a long string into parts (array)
*
* @param string $string
* @param array $delimiters Array of strings to split the string on
* @param int $max_length Maximum length of each part
* @param bool $maximize_parts If true, the different parts will be made as large as possible (combining consecutive short string elements)
*
* @return array
*/
public static function split($string, $delimiters = [], $max_length = 10000, $maximize_parts = true)
{
// String is too short to split
if (strlen($string) < $max_length)
{
return [$string];
}
// No delimiters given or found
if (empty($delimiters) || ! self::contains($string, $delimiters))
{
return [$string];
}
// preg_quote all delimiters
$array = preg_split('#(' . RegEx::quote($delimiters) . ')#s', $string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
if ( ! $maximize_parts)
{
return $array;
}
$new_array = [];
foreach ($array as $i => $part)
{
// First element, add to new array
if ( ! count($new_array))
{
$new_array[] = $part;
continue;
}
$last_part = end($new_array);
$last_key = key($new_array);
// This is the delimiter so add to previous part
if ($i % 2)
{
// Concatenate part to previous part
$new_array[$last_key] .= $part;
continue;
}
// If last and current parts are shorter than or same as max_length, then add to previous part
if (strlen($last_part) + strlen($part) <= $max_length)
{
$new_array[$last_key] .= $part;
continue;
}
$new_array[] = $part;
}
return $new_array;
}
/**
* Converts a string to a camel case
* eg: foo_bar => FooBar
* eg: foo-bar => FooBar
*
* @param string $string
* @param bool $to_lowercase
*
* @return string
*/
public static function toCamelCase($string = '', $to_lowercase = true)
{
$array = ArrayHelper::applyMethodToValues([$string, $to_lowercase]);
if ( ! is_null($array))
{
return $array;
}
$string = JNormalise::toCamelCase($string);
if ( ! $to_lowercase)
{
return $string;
}
return strtolower($string);
}
/**
* Converts a string to a camel case
* eg: FooBar => foo-bar
* eg: foo_bar => foo-bar
*
* @param string|array|object $string
* @param bool $to_lowercase
*
* @return string|array
*/
public static function toDashCase($string = '', $to_lowercase = true)
{
$array = ArrayHelper::applyMethodToValues([$string, $to_lowercase]);
if ( ! is_string($string))
{
return $array;
}
$string = JNormalise::toDashSeparated(JNormalise::fromCamelCase($string));
if ( ! $to_lowercase)
{
return $string;
}
return strtolower($string);
}
/**
* Converts a string to a camel case
* eg: FooBar => foo.bar
* eg: foo_bar => foo.bar
*
* @param string|array|object $string
* @param bool $to_lowercase
*
* @return string|array
*/
public static function toDotCase($string = '', $to_lowercase = true)
{
$array = ArrayHelper::applyMethodToValues([$string, $to_lowercase]);
if ( ! is_string($string))
{
return $array;
}
$string = self::toDashCase($string, $to_lowercase);
return str_replace('-', '.', $string);
}
/**
* Converts a string to a underscore separated string
* eg: FooBar => foo_bar
* eg: foo-bar => foo_bar
*
* @param string $string
* @param bool $to_lowercase
*
* @return string
*/
public static function toUnderscoreCase($string = '', $to_lowercase = true)
{
$array = ArrayHelper::applyMethodToValues([$string, $to_lowercase]);
if ( ! is_null($array))
{
return $array;
}
$string = JNormalise::toUnderscoreSeparated(JNormalise::fromCamelCase($string));
if ( ! $to_lowercase)
{
return $string;
}
return strtolower($string);
}
/**
* @param string $string
* @param int $maxlen
*
* @return string
*/
public static function truncate($string, $maxlen)
{
if (self::strlen($string) <= $maxlen)
{
return $string;
}
return self::substr($string, 0, $maxlen - 3) . '…';
}
}