Subversion-Projekte lars-tiefland.laravel_shop

<?php

/*

 * This file is part of the league/commonmark package.

 *

 * (c) Colin O'Dell <colinodell@gmail.com>

 * (c) 2015 Martin Hasoň <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 SINGLE_ATTRIBUTE = '\s*([.#][_a-z0-9-]+|' . RegexHelper::PARTIAL_ATTRIBUTENAME . RegexHelper::PARTIAL_ATTRIBUTEVALUESPEC . ')\s*';

    private const ATTRIBUTE_LIST   = '/^{:?(' . self::SINGLE_ATTRIBUTE . ')+}/i';

    /**

     * @return array<string, mixed>

     */

    public static function parseAttributes(Cursor $cursor): array

    {

        $state = $cursor->saveState();

        $cursor->advanceToNextNonSpaceOrNewline();

        // Quick check to see if we might have attributes

        if ($cursor->getCharacter() !== '{') {

            $cursor->restoreState($state);

            return [];

        }

        // Attempt to match the entire attribute list expression

        // While this is less performant than checking for '{' now and '}' later, it simplifies

        // matching individual attributes since they won't need to look ahead for the closing '}'

        // while dealing with the fact that attributes can technically contain curly braces.

        // So we'll just match the start and end braces up front.

        $attributeExpression = $cursor->match(self::ATTRIBUTE_LIST);

        if ($attributeExpression === null) {

            $cursor->restoreState($state);

            return [];

        }

        // Trim the leading '{' or '{:' and the trailing '}'

        $attributeExpression = \ltrim(\substr($attributeExpression, 1, -1), ':');

        $attributeCursor     = new Cursor($attributeExpression);

        /** @var array<string, mixed> $attributes */

        $attributes = [];

        while ($attribute = \trim((string) $attributeCursor->match('/^' . self::SINGLE_ATTRIBUTE . '/i'))) {

            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 (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;

    }

}