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<?php
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
* (c) 2015 Martin HasoĊ <martin.hason@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace League\CommonMark\Extension\Attributes\Util;
use League\CommonMark\Node\Node;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Util\RegexHelper;
/**
* @internal
*/
final class AttributesHelper
{
private const REGEX = '/^\s*([.#][_a-z0-9-]+|' . RegexHelper::PARTIAL_ATTRIBUTENAME . RegexHelper::PARTIAL_ATTRIBUTEVALUESPEC . ')(?<!})\s*/i';
/**
* @return array<string, mixed>
*/
public static function parseAttributes(Cursor $cursor): array
{
$state = $cursor->saveState();
$cursor->advanceToNextNonSpaceOrNewline();
if ($cursor->getCurrentCharacter() !== '{') {
$cursor->restoreState($state);
return [];
}
$cursor->advanceBy(1);
if ($cursor->getCurrentCharacter() === ':') {
$cursor->advanceBy(1);
}
$attributes = [];
while ($attribute = \trim((string) $cursor->match(self::REGEX))) {
if ($attribute[0] === '#') {
$attributes['id'] = \substr($attribute, 1);
continue;
}
if ($attribute[0] === '.') {
$attributes['class'][] = \substr($attribute, 1);
continue;
}
[$name, $value] = \explode('=', $attribute, 2);
$first = $value[0];
$last = \substr($value, -1);
if (($first === '"' && $last === '"') || ($first === "'" && $last === "'") && \strlen($value) > 1) {
$value = \substr($value, 1, -1);
}
if (\strtolower(\trim($name)) === 'class') {
foreach (\array_filter(\explode(' ', \trim($value))) as $class) {
$attributes['class'][] = $class;
}
} else {
$attributes[\trim($name)] = \trim($value);
}
}
if ($cursor->match('/}/') === null) {
$cursor->restoreState($state);
return [];
}
if ($attributes === []) {
$cursor->restoreState($state);
return [];
}
if (isset($attributes['class'])) {
$attributes['class'] = \implode(' ', (array) $attributes['class']);
}
return $attributes;
}
/**
* @param Node|array<string, mixed> $attributes1
* @param Node|array<string, mixed> $attributes2
*
* @return array<string, mixed>
*/
public static function mergeAttributes($attributes1, $attributes2): array
{
$attributes = [];
foreach ([$attributes1, $attributes2] as $arg) {
if ($arg instanceof Node) {
$arg = $arg->data->get('attributes');
}
/** @var array<string, mixed> $arg */
$arg = (array) $arg;
if (isset($arg['class'])) {
if (\is_string($arg['class'])) {
$arg['class'] = \array_filter(\explode(' ', \trim($arg['class'])));
}
foreach ($arg['class'] as $class) {
$attributes['class'][] = $class;
}
unset($arg['class']);
}
$attributes = \array_merge($attributes, $arg);
}
if (isset($attributes['class'])) {
$attributes['class'] = \implode(' ', $attributes['class']);
}
return $attributes;
}
}
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