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<?php
/**
 * @package   AllediaFramework
 * @contact   www.joomlashack.com, help@joomlashack.com
 * @copyright 2016-2023 Joomlashack.com. All rights reserved
 * @license   https://www.gnu.org/licenses/gpl.html GNU/GPL
 *
 * This file is part of AllediaFramework.
 *
 * AllediaFramework is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * AllediaFramework is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AllediaFramework.  If not, see <https://www.gnu.org/licenses/>.
 */

namespace Alledia\Framework\Content;

use Alledia\Framework\Base;
use Joomla\Registry\Registry;

defined('_JEXEC') or die();

class Tag extends Base
{
    /**
     * The unparsed tag string
     *
     * @var string
     */
    protected $unparsedString = null;

/**
     * The tag name
     *
     * @var string
     */
    protected $name = null;

/**
     * The tag content
     *
     * @var string
     */
    protected $content = '';

/**
     * The regex used to find the tag
     *
     * @var string
     */
    protected $regex = null;

/**
     * The tag params
     *
     * @var Registry
     */
    public $params = null;

/**
     * Constructor method, that defines the internal content
     *
     * @param string $name
     * @param string $unparsedString
     *
     * @return void
     */
    public function __construct($name, $unparsedString)
    {
        $this->name           = $name;
        $this->unparsedString = $unparsedString;
        $this->regex          = static::getRegex($this->name);

$this->parse();
    }

/**
     * Return the regex used to find tags inside a text.
     *
     * @param string $tagName
     *
     * @return string
     */
    public static function getRegex($tagName)
    {
        return '/\{' . $tagName . '(?:(?!\{\/' . $tagName
            . '\}).)*\}[\s]*([^{]*)[\s]*\{\/' . $tagName . '\}/i';
    }

/**
     * Parse this tag storing the content and params.
     *
     * @return void
     */
    protected function parse()
    {
        $this->content = $this->parseContent();

$this->params = $this->parseParams();
    }

/**
     * Parse the {tagName}{/tagName} returning the content
     *
     * @return string
     */
    protected function parseContent()
    {
        $content = '';

if (!empty($this->unparsedString)) {
            if (strpos($this->unparsedString, '{' . $this->name) !== false) {
                // Check if the source has the tag name
                if (preg_match($this->regex, $this->unparsedString, $match)) {
                    $content = trim($match[1]);
                }
            }
        }

return trim($content);
    }

/**
     * Parse inline parameters from the tag
     *
     * @return Registry
     */
    protected function parseParams()
    {
        // Remove the tag name, extracting only the tag attributes
        $inlineParams = preg_replace('/^{' . $this->name . '/', '', $this->unparsedString);
        $inlineParams = trim(preg_replace('/}[a-z0-9\s]*{\/' . $this->name . '}/', '', $inlineParams));

// Parse the inline params
        $regex  = '/([a-z0-9_]*)(?:="([^"]*)")?\s?/i';
        $parsed = new Registry();
        if (preg_match_all($regex, $inlineParams, $vars)) {
            $fullParams  = $vars[0];
            $paramNames  = $vars[1];
            $paramValues = $vars[2];

foreach ($fullParams as $i => $param) {
                if (!empty($paramNames[$i])) {
                    $parsed->set(trim($paramNames[$i]), trim($paramValues[$i]));
                }
            }
        }

return $parsed;
    }

/**
     * Return the unparsed string
     *
     * @return string
     */
    public function toString()
    {
        return $this->unparsedString;
    }

/**
     * Returns the tag content
     *
     * @return string
     */
    public function getContent()
    {
        return $this->content;
    }

/**
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }

/**
     * @return Registry
     */
    public function getParams()
    {
        return $this->params;
    }
}

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