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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Document;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Cache\Cache;
use Joomla\CMS\Factory as CmsFactory;
use Joomla\CMS\Filter\InputFilter;
use Joomla\CMS\Helper\ModuleHelper;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Uri\Uri;
use Joomla\CMS\Utility\Utility;
use Joomla\CMS\WebAsset\WebAssetManager;
use Joomla\Database\ParameterType;
use Joomla\Registry\Registry;

/**
 * HtmlDocument class, provides an easy interface to parse and display a HTML document
 *
 * @since  1.7.0
 */
class HtmlDocument extends Document
{
	/**
	 * Array of Header `<link>` tags
	 *
	 * @var    array
	 * @since  1.7.0
	 */
	public $_links = array();

/**
	 * Array of custom tags
	 *
	 * @var    array
	 * @since  1.7.0
	 */
	public $_custom = array();

/**
	 * Name of the template
	 *
	 * @var    string
	 * @since  1.7.0
	 */
	public $template = null;

/**
	 * Base url
	 *
	 * @var    string
	 * @since  1.7.0
	 */
	public $baseurl = null;

/**
	 * Array of template parameters
	 *
	 * @var    array
	 * @since  1.7.0
	 */
	public $params = null;

/**
	 * File name
	 *
	 * @var    array
	 * @since  1.7.0
	 */
	public $_file = null;

/**
	 * Script nonce (string if set, null otherwise)
	 *
	 * @var    string|null
	 * @since  4.0.0
	 */
	public $cspNonce = null;

/**
	 * String holding parsed template
	 *
	 * @var    string
	 * @since  1.7.0
	 */
	protected $_template = '';

/**
	 * Array of parsed template JDoc tags
	 *
	 * @var    array
	 * @since  1.7.0
	 */
	protected $_template_tags = array();

/**
	 * Integer with caching setting
	 *
	 * @var    integer
	 * @since  1.7.0
	 */
	protected $_caching = null;

/**
	 * Set to true when the document should be output as HTML5
	 *
	 * @var    boolean
	 * @since  4.0.0
	 */
	private $html5 = true;

/**
	 * Class constructor
	 *
	 * @param   array  $options  Associative array of options
	 *
	 * @since   1.7.0
	 */
	public function __construct($options = array())
	{
		parent::__construct($options);

// Set document type
		$this->_type = 'html';

// Set default mime type and document metadata (metadata syncs with mime type by default)
		$this->setMimeEncoding('text/html');
	}

/**
	 * Get the HTML document head data
	 *
	 * @return  array  The document head data in array form
	 *
	 * @since   1.7.0
	 */
	public function getHeadData()
	{
		$data = array();
		$data['title']         = $this->title;
		$data['description']   = $this->description;
		$data['link']          = $this->link;
		$data['metaTags']      = $this->_metaTags;
		$data['links']         = $this->_links;
		$data['styleSheets']   = $this->_styleSheets;
		$data['style']         = $this->_style;
		$data['scripts']       = $this->_scripts;
		$data['script']        = $this->_script;
		$data['custom']        = $this->_custom;

// @deprecated 5.0  This property is for backwards compatibility. Pass text through script options in the future
		$data['scriptText']    = Text::getScriptStrings();

$data['scriptOptions'] = $this->scriptOptions;

// Get Asset manager state
		$wa      = $this->getWebAssetManager();
		$waState = $wa->getManagerState();

// Get asset objects and filter only manually added/enabled assets,
		// Dependencies will be picked up from registry files
		$waState['assets'] = [];

foreach ($waState['activeAssets'] as $assetType => $assetNames)
		{
			foreach ($assetNames as $assetName => $assetState)
			{
				if ($assetState === WebAssetManager::ASSET_STATE_ACTIVE)
				{
					$waState['assets'][$assetType][] = $wa->getAsset($assetType, $assetName);
				}
			}
		}

// We have loaded asset objects, now can remove unused stuff
		unset($waState['activeAssets']);

$data['assetManager'] = $waState;

return $data;
	}

/**
	 * Reset the HTML document head data
	 *
	 * @param   mixed  $types  type or types of the heads elements to reset
	 *
	 * @return  HtmlDocument  instance of $this to allow chaining
	 *
	 * @since   3.7.0
	 */
	public function resetHeadData($types = null)
	{
		if (\is_null($types))
		{
			$this->title         = '';
			$this->description   = '';
			$this->link          = '';
			$this->_metaTags     = array();
			$this->_links        = array();
			$this->_styleSheets  = array();
			$this->_style        = array();
			$this->_scripts      = array();
			$this->_script       = array();
			$this->_custom       = array();
			$this->scriptOptions = array();
		}

if (\is_array($types))
		{
			foreach ($types as $type)
			{
				$this->resetHeadDatum($type);
			}
		}

if (\is_string($types))
		{
			$this->resetHeadDatum($types);
		}

return $this;
	}

/**
	 * Reset a part the HTML document head data
	 *
	 * @param   string  $type  type of the heads elements to reset
	 *
	 * @return  void
	 *
	 * @since   3.7.0
	 */
	private function resetHeadDatum($type)
	{
		switch ($type)
		{
			case 'title':
			case 'description':
			case 'link':
				$this->{$type} = '';
				break;

case 'metaTags':
			case 'links':
			case 'styleSheets':
			case 'style':
			case 'scripts':
			case 'script':
			case 'custom':
				$realType = '_' . $type;
				$this->{$realType} = array();
				break;

case 'scriptOptions':
				$this->{$type} = array();
				break;
		}
	}

/**
	 * Set the HTML document head data
	 *
	 * @param   array  $data  The document head data in array form
	 *
	 * @return  HtmlDocument|null instance of $this to allow chaining or null for empty input data
	 *
	 * @since   1.7.0
	 */
	public function setHeadData($data)
	{
		if (empty($data) || !\is_array($data))
		{
			return null;
		}

$this->title         = $data['title'] ?? $this->title;
		$this->description   = $data['description'] ?? $this->description;
		$this->link          = $data['link'] ?? $this->link;
		$this->_metaTags     = $data['metaTags'] ?? $this->_metaTags;
		$this->_links        = $data['links'] ?? $this->_links;
		$this->_styleSheets  = $data['styleSheets'] ?? $this->_styleSheets;
		$this->_style        = $data['style'] ?? $this->_style;
		$this->_scripts      = $data['scripts'] ?? $this->_scripts;
		$this->_script       = $data['script'] ?? $this->_script;
		$this->_custom       = $data['custom'] ?? $this->_custom;
		$this->scriptOptions = (isset($data['scriptOptions']) && !empty($data['scriptOptions'])) ? $data['scriptOptions'] : $this->scriptOptions;

// Restore asset manager state
		$wa = $this->getWebAssetManager();

if (!empty($data['assetManager']['registryFiles']))
		{
			$waRegistry = $wa->getRegistry();

foreach ($data['assetManager']['registryFiles'] as $registryFile)
			{
				$waRegistry->addRegistryFile($registryFile);
			}
		}

if (!empty($data['assetManager']['assets']))
		{
			foreach ($data['assetManager']['assets'] as $assetType => $assets)
			{
				foreach ($assets as $asset)
				{
					$wa->registerAsset($assetType, $asset)->useAsset($assetType, $asset->getName());
				}
			}
		}

return $this;
	}

/**
	 * Merge the HTML document head data
	 *
	 * @param   array  $data  The document head data in array form
	 *
	 * @return  HtmlDocument|null instance of $this to allow chaining or null for empty input data
	 *
	 * @since   1.7.0
	 */
	public function mergeHeadData($data)
	{
		if (empty($data) || !\is_array($data))
		{
			return;
		}

$this->title = (isset($data['title']) && !empty($data['title']) && !stristr($this->title, $data['title']))
			? $this->title . $data['title']
			: $this->title;
		$this->description = (isset($data['description']) && !empty($data['description']) && !stristr($this->description, $data['description']))
			? $this->description . $data['description']
			: $this->description;
		$this->link = $data['link'] ?? $this->link;

if (isset($data['metaTags']))
		{
			foreach ($data['metaTags'] as $type1 => $data1)
			{
				$booldog = $type1 === 'http-equiv';

foreach ($data1 as $name2 => $data2)
				{
					$this->setMetaData($name2, $data2, $booldog);
				}
			}
		}

$this->_links = (isset($data['links']) && !empty($data['links']) && \is_array($data['links']))
			? array_unique(array_merge($this->_links, $data['links']), SORT_REGULAR)
			: $this->_links;
		$this->_styleSheets = (isset($data['styleSheets']) && !empty($data['styleSheets']) && \is_array($data['styleSheets']))
			? array_merge($this->_styleSheets, $data['styleSheets'])
			: $this->_styleSheets;

if (isset($data['style']))
		{
			foreach ($data['style'] as $type => $styles)
			{
				foreach ($styles as $hash => $style)
				{
					if (!isset($this->_style[strtolower($type)][$hash]))
					{
						$this->addStyleDeclaration($style, $type);
					}
				}
			}
		}

$this->_scripts = (isset($data['scripts']) && !empty($data['scripts']) && \is_array($data['scripts']))
			? array_merge($this->_scripts, $data['scripts'])
			: $this->_scripts;

if (isset($data['script']))
		{
			foreach ($data['script'] as $type => $scripts)
			{
				foreach ($scripts as $hash => $script)
				{
					if (!isset($this->_script[strtolower($type)][$hash]))
					{
						$this->addScriptDeclaration($script, $type);
					}
				}
			}
		}

$this->_custom = (isset($data['custom']) && !empty($data['custom']) && \is_array($data['custom']))
			? array_unique(array_merge($this->_custom, $data['custom']))
			: $this->_custom;

if (!empty($data['scriptOptions']))
		{
			foreach ($data['scriptOptions'] as $key => $scriptOptions)
			{
				$this->addScriptOptions($key, $scriptOptions, true);
			}
		}

// Restore asset manager state
		$wa = $this->getWebAssetManager();

if (!empty($data['assetManager']['registryFiles']))
		{
			$waRegistry = $wa->getRegistry();

foreach ($data['assetManager']['registryFiles'] as $registryFile)
			{
				$waRegistry->addRegistryFile($registryFile);
			}
		}

return $this;
	}

/**
	 * Adds `<link>` tags to the head of the document
	 *
	 * $relType defaults to 'rel' as it is the most common relation type used.
	 * ('rev' refers to reverse relation, 'rel' indicates normal, forward relation.)
	 * Typical tag: `<link href="index.php" rel="Start">`
	 *
	 * @param   string  $href      The link that is being related.
	 * @param   string  $relation  Relation of link.
	 * @param   string  $relType   Relation type attribute.  Either rel or rev (default: 'rel').
	 * @param   array   $attribs   Associative array of remaining attributes.
	 *
	 * @return  HtmlDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function addHeadLink($href, $relation, $relType = 'rel', $attribs = array())
	{
		$this->_links[$href]['relation'] = $relation;
		$this->_links[$href]['relType'] = $relType;
		$this->_links[$href]['attribs'] = $attribs;

return $this;
	}

/**
	 * Adds a shortcut icon (favicon)
	 *
	 * This adds a link to the icon shown in the favorites list or on
	 * the left of the url in the address bar. Some browsers display
	 * it on the tab, as well.
	 *
	 * @param   string  $href      The link that is being related.
	 * @param   string  $type      File type
	 * @param   string  $relation  Relation of link
	 *
	 * @return  HtmlDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function addFavicon($href, $type = 'image/vnd.microsoft.icon', $relation = 'shortcut icon')
	{
		$href = str_replace('\\', '/', $href);
		$this->addHeadLink($href, $relation, 'rel', array('type' => $type));

return $this;
	}

/**
	 * Adds a custom HTML string to the head block
	 *
	 * @param   string  $html  The HTML to add to the head
	 *
	 * @return  HtmlDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function addCustomTag($html)
	{
		$this->_custom[] = trim($html);

return $this;
	}

/**
	 * Returns whether the document is set up to be output as HTML5
	 *
	 * @return  boolean true when HTML5 is used
	 *
	 * @since   3.0.0
	 */
	public function isHtml5()
	{
		return $this->html5;
	}

/**
	 * Sets whether the document should be output as HTML5
	 *
	 * @param   bool  $state  True when HTML5 should be output
	 *
	 * @return  void
	 *
	 * @since   3.0.0
	 */
	public function setHtml5($state)
	{
		if (\is_bool($state))
		{
			$this->html5 = $state;
		}
	}

/**
	 * Get the contents of a document include
	 *
	 * @param   string  $type     The type of renderer
	 * @param   string  $name     The name of the element to render
	 * @param   array   $attribs  Associative array of remaining attributes.
	 *
	 * @return  mixed|string The output of the renderer
	 *
	 * @since   1.7.0
	 */
	public function getBuffer($type = null, $name = null, $attribs = array())
	{
		// If no type is specified, return the whole buffer
		if ($type === null)
		{
			return parent::$_buffer;
		}

$title = $attribs['title'] ?? null;

if (isset(parent::$_buffer[$type][$name][$title]))
		{
			return parent::$_buffer[$type][$name][$title];
		}

$renderer = $this->loadRenderer($type);

if ($this->_caching == true && $type === 'modules')
		{
			/** @var  \Joomla\CMS\Document\Renderer\Html\ModulesRenderer  $renderer */
			$cache = CmsFactory::getCache('com_modules', '');
			$hash = md5(serialize(array($name, $attribs, null, get_class($renderer))));
			$cbuffer = $cache->get('cbuffer_' . $type);

if (isset($cbuffer[$hash]))
			{
				return Cache::getWorkarounds($cbuffer[$hash], array('mergehead' => 1));
			}
			else
			{
				$options = array();
				$options['nopathway'] = 1;
				$options['nomodules'] = 1;
				$options['modulemode'] = 1;

$this->setBuffer($renderer->render($name, $attribs, null), $type, $name);
				$data = parent::$_buffer[$type][$name][$title];

$tmpdata = Cache::setWorkarounds($data, $options);

$cbuffer[$hash] = $tmpdata;

$cache->store($cbuffer, 'cbuffer_' . $type);
			}
		}
		else
		{
			$this->setBuffer($renderer->render($name, $attribs, null), $type, $name, $title);
		}

return parent::$_buffer[$type][$name][$title];
	}

/**
	 * Set the contents a document includes
	 *
	 * @param   string  $content  The content to be set in the buffer.
	 * @param   array   $options  Array of optional elements.
	 *
	 * @return  HtmlDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function setBuffer($content, $options = array())
	{
		// The following code is just for backward compatibility.
		if (\func_num_args() > 1 && !\is_array($options))
		{
			$args = \func_get_args();
			$options = array();
			$options['type'] = $args[1];
			$options['name'] = $args[2] ?? null;
			$options['title'] = $args[3] ?? null;
		}

parent::$_buffer[$options['type']][$options['name']][$options['title']] = $content;

return $this;
	}

/**
	 * Parses the template and populates the buffer
	 *
	 * @param   array  $params  Parameters for fetching the template
	 *
	 * @return  HtmlDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	public function parse($params = array())
	{
		return $this->_fetchTemplate($params)->_parseTemplate();
	}

/**
	 * Outputs the template to the browser.
	 *
	 * @param   boolean  $caching  If true, cache the output
	 * @param   array    $params   Associative array of attributes
	 *
	 * @return  string The rendered data
	 *
	 * @since   1.7.0
	 */
	public function render($caching = false, $params = array())
	{
		$this->_caching = $caching;

if (empty($this->_template))
		{
			$this->parse($params);
		}

if (\array_key_exists('csp_nonce', $params) && $params['csp_nonce'] !== null)
		{
			$this->cspNonce = $params['csp_nonce'];
		}

$data = $this->_renderTemplate();
		parent::render($caching, $params);

return $data;
	}

/**
	 * Count the modules in the given position
	 *
	 * @param   string   $positionName     The position to use
	 * @param   boolean  $withContentOnly  Count only a modules which actually has a content
	 *
	 * @return  integer  Number of modules found
	 *
	 * @since   1.7.0
	 */
	public function countModules(string $positionName, bool $withContentOnly = false)
	{
		if ((isset(parent::$_buffer['modules'][$positionName])) && (parent::$_buffer['modules'][$positionName] === false))
		{
			return 0;
		}

$modules = ModuleHelper::getModules($positionName);

if (!$withContentOnly)
		{
			return \count($modules);
		}

// Now we need to count only modules which actually have a content
		$result   = 0;
		$renderer = $this->loadRenderer('module');

foreach ($modules as $module)
		{
			if (empty($module->contentRendered))
			{
				$renderer->render($module, ['contentOnly' => true]);
			}

if (trim($module->content) !== '')
			{
				$result++;
			}
		}

return $result;
	}

/**
	 * Count the number of child menu items of the current active menu item
	 *
	 * @return  integer  Number of child menu items
	 *
	 * @since   1.7.0
	 */
	public function countMenuChildren()
	{
		static $children;

if (!isset($children))
		{
			$db = CmsFactory::getDbo();
			$app = CmsFactory::getApplication();
			$menu = $app->getMenu();
			$active = $menu->getActive();
			$children = 0;

if ($active)
			{
				$query = $db->getQuery(true)
					->select('COUNT(*)')
					->from($db->quoteName('#__menu'))
					->where(
						[
							$db->quoteName('parent_id') . ' = :id',
							$db->quoteName('published') . ' = 1',
						]
					)
					->bind(':id', $active->id, ParameterType::INTEGER);
				$db->setQuery($query);
				$children = $db->loadResult();
			}
		}

return $children;
	}

/**
	 * Load a template file
	 *
	 * @param   string  $directory  The name of the template
	 * @param   string  $filename   The actual filename
	 *
	 * @return  string  The contents of the template
	 *
	 * @since   1.7.0
	 */
	protected function _loadTemplate($directory, $filename)
	{
		$contents = '';

// Check to see if we have a valid template file
		if (is_file($directory . '/' . $filename))
		{
			// Store the file path
			$this->_file = $directory . '/' . $filename;

// Get the file content
			ob_start();
			require $directory . '/' . $filename;
			$contents = ob_get_contents();
			ob_end_clean();
		}

return $contents;
	}

/**
	 * Fetch the template, and initialise the params
	 *
	 * @param   array  $params  Parameters to determine the template
	 *
	 * @return  HtmlDocument instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	protected function _fetchTemplate($params = array())
	{
		// Check
		$directory = $params['directory'] ?? 'templates';
		$filter = InputFilter::getInstance();
		$template = $filter->clean($params['template'], 'cmd');
		$file = $filter->clean($params['file'], 'cmd');
		$inherits = $params['templateInherits'] ?? '';
		$baseDir = $directory . '/' . $template;

if (!is_file($directory . '/' . $template . '/' . $file))
		{
			if ($inherits !== '' && is_file($directory . '/' . $inherits . '/' . $file))
			{
				$baseDir = $directory . '/' . $inherits;
			}
			else
			{
				$baseDir  = $directory . '/system';
				$template = 'system';

if ($file !== 'index.php' && !is_file($baseDir . '/' . $file))
				{
					$file = 'index.php';
				}
			}
		}

// Load the language file for the template
		$lang = CmsFactory::getLanguage();

// 1.5 or core then 1.6
		$lang->load('tpl_' . $template, JPATH_BASE)
			|| ($inherits !== '' && $lang->load('tpl_' . $inherits, $directory . '/' . $inherits))
			|| $lang->load('tpl_' . $template, $directory . '/' . $template);

// Assign the variables
		$this->baseurl = Uri::base(true);
		$this->params = $params['params'] ?? new Registry;
		$this->template = $template;

// Load
		$this->_template = $this->_loadTemplate($baseDir, $file);

return $this;
	}

/**
	 * Parse a document template
	 *
	 * @return  HtmlDocument  instance of $this to allow chaining
	 *
	 * @since   1.7.0
	 */
	protected function _parseTemplate()
	{
		$matches = array();

if (preg_match_all('#<jdoc:include\ type="([^"]+)"(.*)\/>#iU', $this->_template, $matches))
		{
			$messages = [];
			$template_tags_first = [];
			$template_tags_last = [];

// Step through the jdocs in reverse order.
			for ($i = \count($matches[0]) - 1; $i >= 0; $i--)
			{
				$type = $matches[1][$i];
				$attribs = empty($matches[2][$i]) ? array() : Utility::parseAttributes($matches[2][$i]);
				$name = $attribs['name'] ?? null;

// Separate buffers to be executed first and last
				if ($type === 'module' || $type === 'modules')
				{
					$template_tags_first[$matches[0][$i]] = ['type' => $type, 'name' => $name, 'attribs' => $attribs];
				}
				elseif ($type === 'message')
				{
					$messages = [$matches[0][$i] => ['type' => $type, 'name' => $name, 'attribs' => $attribs]];
				}
				else
				{
					$template_tags_last[$matches[0][$i]] = ['type' => $type, 'name' => $name, 'attribs' => $attribs];
				}
			}

$this->_template_tags = $template_tags_first + $messages + array_reverse($template_tags_last);
		}

return $this;
	}

/**
	 * Render pre-parsed template
	 *
	 * @return string rendered template
	 *
	 * @since   1.7.0
	 */
	protected function _renderTemplate()
	{
		$replace = [];
		$with = [];

foreach ($this->_template_tags as $jdoc => $args)
		{
			$replace[] = $jdoc;
			$with[] = $this->getBuffer($args['type'], $args['name'], $args['attribs']);
		}

return str_replace($replace, $with, $this->_template);
	}
}