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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\HTML;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Environment\Browser;
use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\File;
use Joomla\CMS\Filesystem\Path;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Layout\LayoutHelper;
use Joomla\CMS\Log\Log;
use Joomla\CMS\Uri\Uri;
use Joomla\Utilities\ArrayHelper;

/**
 * Utility class for all HTML drawing classes
 *
 * @since  1.5
 */
abstract class HTMLHelper
{
	/**
	 * Option values related to the generation of HTML output. Recognized
	 * options are:
	 *     fmtDepth, integer. The current indent depth.
	 *     fmtEol, string. The end of line string, default is linefeed.
	 *     fmtIndent, string. The string to use for indentation, default is
	 *     tab.
	 *
	 * @var    array
	 * @since  1.5
	 */
	public static $formatOptions = array('format.depth' => 0, 'format.eol' => "\n", 'format.indent' => "\t");

/**
	 * An array to hold included paths
	 *
	 * @var    string[]
	 * @since  1.5
	 * @deprecated  5.0
	 */
	protected static $includePaths = array();

/**
	 * An array to hold method references
	 *
	 * @var    callable[]
	 * @since  1.6
	 * @deprecated  5.0
	 */
	protected static $registry = array();

/**
	 * The service registry for custom and overridden JHtml helpers
	 *
	 * @var    Registry
	 * @since  4.0.0
	 */
	protected static $serviceRegistry;

/**
	 * Method to extract a key
	 *
	 * @param   string  $key  The name of helper method to load, (prefix).(class).function
	 *                        prefix and class are optional and can be used to load custom html helpers.
	 *
	 * @return  array  Contains lowercase key, prefix, file, function.
	 *
	 * @since       1.6
	 * @deprecated  5.0 Use the service registry instead
	 */
	protected static function extract($key)
	{
		$key = preg_replace('#[^A-Z0-9_\.]#i', '', $key);

// Check to see whether we need to load a helper file
		$parts = explode('.', $key);

if (\count($parts) === 3)
		{
			try
			{
				Log::add(
					'Support for a three segment service key is deprecated and will be removed in Joomla 5.0, use the service registry instead',
					Log::WARNING,
					'deprecated'
				);
			}
			catch (\RuntimeException $exception)
			{
				// Informational message only, continue on
			}
		}

$prefix = \count($parts) === 3 ? array_shift($parts) : 'JHtml';
		$file   = \count($parts) === 2 ? array_shift($parts) : '';
		$func   = array_shift($parts);

return array(strtolower($prefix . '.' . $file . '.' . $func), $prefix, $file, $func);
	}

/**
	 * Class loader method
	 *
	 * Additional arguments may be supplied and are passed to the sub-class.
	 * Additional include paths are also able to be specified for third-party use
	 *
	 * @param   string  $key         The name of helper method to load, (prefix).(class).function
	 *                               prefix and class are optional and can be used to load custom
	 *                               html helpers.
	 * @param   array   $methodArgs  The arguments to pass forward to the method being called
	 *
	 * @return  mixed  Result of HTMLHelper::call($function, $args)
	 *
	 * @since   1.5
	 * @throws  \InvalidArgumentException
	 */
	final public static function _(string $key, ...$methodArgs)
	{
		list($key, $prefix, $file, $func) = static::extract($key);

if (\array_key_exists($key, static::$registry))
		{
			$function = static::$registry[$key];

return static::call($function, $methodArgs);
		}

/*
		 * Support fetching services from the registry if a custom class prefix was not given (a three segment key),
		 * the service comes from a class other than this one, and a service has been registered for the file.
		 */
		if ($prefix === 'JHtml' && $file !== '' && static::getServiceRegistry()->hasService($file))
		{
			$service = static::getServiceRegistry()->getService($file);

$toCall = array($service, $func);

if (!\is_callable($toCall))
			{
				throw new \InvalidArgumentException(sprintf('%s::%s not found.', $file, $func), 500);
			}

static::register($key, $toCall);

return static::call($toCall, $methodArgs);
		}

$className = $prefix . ucfirst($file);

if (!class_exists($className))
		{
			$path = Path::find(static::$includePaths, strtolower($file) . '.php');

if (!$path)
			{
				throw new \InvalidArgumentException(sprintf('%s %s not found.', $prefix, $file), 500);
			}

\JLoader::register($className, $path);

if (!class_exists($className))
			{
				throw new \InvalidArgumentException(sprintf('%s not found.', $className), 500);
			}
		}

// If calling a method from this class, do not allow access to internal methods
		if ($className === __CLASS__)
		{
			if (!((new \ReflectionMethod($className, $func))->isPublic()))
			{
				throw new \InvalidArgumentException('Access to internal class methods is not allowed.');
			}
		}

$toCall = array($className, $func);

if (!\is_callable($toCall))
		{
			throw new \InvalidArgumentException(sprintf('%s::%s not found.', $className, $func), 500);
		}

static::register($key, $toCall);

return static::call($toCall, $methodArgs);
	}

/**
	 * Registers a function to be called with a specific key
	 *
	 * @param   string    $key       The name of the key
	 * @param   callable  $function  Function or method
	 *
	 * @return  boolean  True if the function is callable
	 *
	 * @since       1.6
	 * @deprecated  5.0 Use the service registry instead
	 */
	public static function register($key, callable $function)
	{
		try
		{
			Log::add(
				'Support for registering functions is deprecated and will be removed in Joomla 5.0, use the service registry instead',
				Log::WARNING,
				'deprecated'
			);
		}
		catch (\RuntimeException $exception)
		{
			// Informational message only, continue on
		}

list($key) = static::extract($key);

static::$registry[$key] = $function;

return true;
	}

/**
	 * Removes a key for a method from registry.
	 *
	 * @param   string  $key  The name of the key
	 *
	 * @return  boolean  True if a set key is unset
	 *
	 * @since       1.6
	 * @deprecated  5.0 Use the service registry instead
	 */
	public static function unregister($key)
	{
		try
		{
			Log::add(
				'Support for registering functions is deprecated and will be removed in Joomla 5.0, use the service registry instead',
				Log::WARNING,
				'deprecated'
			);
		}
		catch (\RuntimeException $exception)
		{
			// Informational message only, continue on
		}

list($key) = static::extract($key);

if (isset(static::$registry[$key]))
		{
			unset(static::$registry[$key]);

return true;
		}

return false;
	}

/**
	 * Test if the key is registered.
	 *
	 * @param   string  $key  The name of the key
	 *
	 * @return  boolean  True if the key is registered.
	 *
	 * @since   1.6
	 */
	public static function isRegistered($key)
	{
		list($key) = static::extract($key);

return isset(static::$registry[$key]);
	}

/**
	 * Retrieves the service registry.
	 *
	 * @return  Registry
	 *
	 * @since   4.0.0
	 */
	public static function getServiceRegistry(): Registry
	{
		if (!static::$serviceRegistry)
		{
			static::$serviceRegistry = Factory::getContainer()->get(Registry::class);
		}

return static::$serviceRegistry;
	}

/**
	 * Function caller method
	 *
	 * @param   callable  $function  Function or method to call
	 * @param   array     $args      Arguments to be passed to function
	 *
	 * @return  mixed   Function result or false on error.
	 *
	 * @link    https://www.php.net/manual/en/function.call-user-func-array.php
	 * @since   1.6
	 * @throws  \InvalidArgumentException
	 */
	protected static function call(callable $function, $args)
	{
		// PHP 5.3 workaround
		$temp = array();

foreach ($args as &$arg)
		{
			$temp[] = &$arg;
		}

return \call_user_func_array($function, $temp);
	}

/**
	 * Write a `<a>` element
	 *
	 * @param   string        $url      The relative URL to use for the href attribute
	 * @param   string        $text     The target attribute to use
	 * @param   array|string  $attribs  Attributes to be added to the `<a>` element
	 *
	 * @return  string
	 *
	 * @since   1.5
	 */
	public static function link($url, $text, $attribs = null)
	{
		if (\is_array($attribs))
		{
			$attribs = ArrayHelper::toString($attribs);
		}

return '<a href="' . $url . '" ' . $attribs . '>' . $text . '</a>';
	}

/**
	 * Write a `<iframe>` element
	 *
	 * @param   string        $url       The relative URL to use for the src attribute.
	 * @param   string        $name      The target attribute to use.
	 * @param   array|string  $attribs   Attributes to be added to the `<iframe>` element
	 * @param   string        $noFrames  The message to display if the iframe tag is not supported.
	 *
	 * @return  string
	 *
	 * @since   1.5
	 */
	public static function iframe($url, $name, $attribs = null, $noFrames = '')
	{
		if (\is_array($attribs))
		{
			$attribs = ArrayHelper::toString($attribs);
		}

return '<iframe src="' . $url . '" ' . $attribs . ' name="' . $name . '">' . $noFrames . '</iframe>';
	}

/**
	 * Compute the files to be included
	 *
	 * @param   string   $folder         Folder name to search in (i.e. images, css, js).
	 * @param   string   $file           Path to file.
	 * @param   boolean  $relative       Flag if the path to the file is relative to the /media folder (and searches in template).
	 * @param   boolean  $detectBrowser  Flag if the browser should be detected to include specific browser files.
	 * @param   boolean  $detectDebug    Flag if debug mode is enabled to include uncompressed files if debug is on.
	 *
	 * @return  array    files to be included.
	 *
	 * @see     Browser
	 * @since   1.6
	 */
	protected static function includeRelativeFiles($folder, $file, $relative, $detectBrowser, $detectDebug)
	{
		// Set debug flag
		$debugMode = false;

// Detect debug mode
		if ($detectDebug && JDEBUG)
		{
			$debugMode = true;
		}

// If http is present in filename
		if (strpos($file, 'http') === 0 || strpos($file, '//') === 0)
		{
			$includes = [$file];
		}
		else
		{
			// Extract extension and strip the file
			$strip = File::stripExt($file);
			$ext   = File::getExt($file);

// Prepare array of files
			$includes = [];

// Detect browser and compute potential files
			if ($detectBrowser)
			{
				$navigator = Browser::getInstance();
				$browser   = $navigator->getBrowser();
				$major     = $navigator->getMajor();
				$minor     = $navigator->getMinor();
				$minExt    = '';

if (\strlen($strip) > 4 && preg_match('#\.min$#', $strip))
				{
					$minExt    = '.min';
					$strip = preg_replace('#\.min$#', '', $strip);
				}

// Try to include files named filename.ext, filename_browser.ext, filename_browser_major.ext, filename_browser_major_minor.ext
				// where major and minor are the browser version names
				$potential = [
					$strip . $minExt,
					$strip . '_' . $browser . $minExt,
					$strip . '_' . $browser . '_' . $major . $minExt,
					$strip . '_' . $browser . '_' . $major . '_' . $minor . $minExt,
				];
			}
			else
			{
				$potential = [$strip];
			}

// If relative search in template directory or media directory
			if ($relative)
			{
				$app        = Factory::getApplication();
				$template   = $app->getTemplate(true);
				$templaPath = JPATH_THEMES;

if ($template->inheritable || !empty($template->parent))
				{
					$client     = $app->isClient('administrator') === true ? 'administrator' : 'site';
					$templaPath = JPATH_ROOT . "/media/templates/$client";
				}

// For each potential files
				foreach ($potential as $strip)
				{
					$files = [];
					$files[] = $strip . '.' . $ext;

/**
					 * Loop on 1 or 2 files and break on first found.
					 * Add the content of the MD5SUM file located in the same folder to url to ensure cache browser refresh
					 * This MD5SUM file must represent the signature of the folder content
					 */
					foreach ($files as $file)
					{
						if (!empty($template->parent))
						{
							$found = static::addFileToBuffer("$templaPath/$template->template/$folder/$file", $ext, $debugMode);

if (empty($found))
							{
								$found = static::addFileToBuffer("$templaPath/$template->parent/$folder/$file", $ext, $debugMode);
							}
						}
						else
						{
							$found = static::addFileToBuffer("$templaPath/$template->template/$folder/$file", $ext, $debugMode);
						}

if (!empty($found))
						{
							$includes[] = $found;

break;
						}
						else
						{
							// If the file contains any /: it can be in a media extension subfolder
							if (strpos($file, '/'))
							{
								// Divide the file extracting the extension as the first part before /
								list($extension, $file) = explode('/', $file, 2);

// If the file yet contains any /: it can be a plugin
								if (strpos($file, '/'))
								{
									// Divide the file extracting the element as the first part before /
									list($element, $file) = explode('/', $file, 2);

// Try to deal with plugins group in the media folder
									$found = static::addFileToBuffer(JPATH_ROOT . "/media/$extension/$element/$folder/$file", $ext, $debugMode);

if (!empty($found))
									{
										$includes[] = $found;

break;
									}

// Try to deal with classical file in a media subfolder called element
									$found = static::addFileToBuffer(JPATH_ROOT . "/media/$extension/$folder/$element/$file", $ext, $debugMode);

if (!empty($found))
									{
										$includes[] = $found;

break;
									}

// Try to deal with system files in the template folder
									if (!empty($template->parent))
									{
										$found = static::addFileToBuffer("$templaPath/$template->template/$folder/system/$element/$file", $ext, $debugMode);