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<?php
/**
* This file is part of the Latte (https://latte.nette.org)
* Copyright (c) 2008 David Grudl (https://davidgrudl.com)
*/
declare(strict_types=1);
namespace Latte;
/**
* Latte helpers.
* @internal
*/
class Helpers
{
/** @var array<string, int> empty (void) HTML elements */
public static $emptyElements = [
'img' => 1, 'hr' => 1, 'br' => 1, 'input' => 1, 'meta' => 1, 'area' => 1, 'embed' => 1, 'keygen' => 1, 'source' => 1, 'base' => 1,
'col' => 1, 'link' => 1, 'param' => 1, 'basefont' => 1, 'frame' => 1, 'isindex' => 1, 'wbr' => 1, 'command' => 1, 'track' => 1,
];
/**
* Checks callback.
* @param mixed $callable
*/
public static function checkCallback($callable): callable
{
if (!is_callable($callable, false, $text)) {
throw new \InvalidArgumentException("Callback '$text' is not callable.");
}
return $callable;
}
/**
* Finds the best suggestion.
* @param string[] $items
*/
public static function getSuggestion(array $items, string $value): ?string
{
$best = null;
$min = (strlen($value) / 4 + 1) * 10 + .1;
foreach (array_unique($items) as $item) {
if (($len = levenshtein($item, $value, 10, 11, 10)) > 0 && $len < $min) {
$min = $len;
$best = $item;
}
}
return $best;
}
public static function removeFilter(string &$modifier, string $filter): bool
{
$modifier = preg_replace('#\|(' . $filter . ')\s?(?=\||$)#Di', '', $modifier, -1, $found);
return (bool) $found;
}
/**
* Starts the $haystack string with the prefix $needle?
*/
public static function startsWith(string $haystack, string $needle): bool
{
return strncmp($haystack, $needle, strlen($needle)) === 0;
}
}