<?php
/**
*
* @package avatar
* @copyright (c) 2011 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/

/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
	exit;
}

/**
* @package avatar
*/
class phpbb_avatar_manager
{
	protected $phpbb_root_path;
	protected $phpEx;
	protected $config;
	protected $request;
	protected $cache;
	protected static $valid_drivers = false;
	protected $avatar_drivers;
	protected $container;

	/**
	* Construct an avatar manager object
	*
	* @param string $phpbb_root_path Path to the phpBB root
	* @param string $phpEx PHP file extension
	* @param phpbb_config $config phpBB configuration
	* @param phpbb_request $request Request object
	* @param phpbb_cache_driver_interface $cache Cache driver
	* @param array $avatar_drivers Avatar drivers passed via the service container
	* @param object $container Container object
	*/
	public function __construct($phpbb_root_path, $phpEx, phpbb_config $config, phpbb_request $request, phpbb_cache_driver_interface $cache, $avatar_drivers, $container)
	{
		$this->phpbb_root_path = $phpbb_root_path;
		$this->phpEx = $phpEx;
		$this->config = $config;
		$this->request = $request;
		$this->cache = $cache;
		$this->avatar_drivers = $avatar_drivers;
		$this->container = $container;
	}

	/**
	* Get the driver object specified by the avatar type
	*
	* @param string $avatar_type Avatar type; by default an avatar's service container name
	* @param bool $force_all Grab all avatar drivers, no matter if enabled or not
	*
	* @return object Avatar driver object
	*/
	public function get_driver($avatar_type, $force_all = false)
	{
		if (self::$valid_drivers === false || $force_all)
		{
			$this->load_valid_drivers($force_all);
		}

		// Legacy stuff...
		switch ($avatar_type)
		{
			case AVATAR_GALLERY:
				$avatar_type = 'avatar.driver.local';
			break;
			case AVATAR_UPLOAD:
				$avatar_type = 'avatar.driver.upload';
			break;
			case AVATAR_REMOTE:
				$avatar_type = 'avatar.driver.remote';
			break;
		}

		if (!isset(self::$valid_drivers[$avatar_type]))
		{
			return null;
		}

		$driver = $this->container->get($avatar_type);
		if ($driver !== false)
		{
			return $driver;
		}
		else
		{
			$message = "Invalid avatar driver class name '%s' provided.";
			trigger_error(sprintf($message, $avatar_type));
		}

		return $driver;
	}

	/**
	* Load the list of valid drivers
	* This is executed once and fills self::$valid_drivers
	*
	* @param bool $force_all Force showing all avatar drivers
	*/
	protected function load_valid_drivers($force_all = false)
	{
		if (!empty($this->avatar_drivers))
		{
			self::$valid_drivers = array();
			foreach ($this->avatar_drivers as $driver)
			{
				if ($force_all || $this->is_enabled($driver))
				{
					self::$valid_drivers[$driver->get_name()] = $driver->get_name();
				}
			}
			asort(self::$valid_drivers);
		}
	}

	/**
	* Get a list of valid avatar drivers
	*
	* @param bool $force_all Force showing all avatar drivers
	*
	* @return array Array containing a list of the valid avatar drivers
	*/
	public function get_valid_drivers($force_all = false)
	{
		if (self::$valid_drivers === false)
		{
			$this->load_valid_drivers($force_all);
		}

		return self::$valid_drivers;
	}

	/**
	* Strip out user_ and group_ prefixes from keys
	*
	* @param array	$row User data or group data
	*
	* @return array User data or group data with keys that have been
	*        stripped from the preceding "user_" or "group_"
	*/
	public static function clean_row($row)
	{
		$keys = array_keys($row);
		$values = array_values($row);

		$keys = array_map(
			function ($key)
			{
				return preg_replace('#^(?:user_|group_)#', '', $key);
			},
			$keys
		);

		return array_combine($keys, $values);
	}

	/**
	* Clean driver names that are returned from template files
	* Underscores are replaced with dots
	*
	* @param string $name Driver name
	*
	* @return string Cleaned driver name
	*/
	public static function clean_driver_name($name)
	{
		return str_replace('_', '.', $name);
	}

	/**
	* Prepare driver names for use in template files
	* Dots are replaced with underscores
	*
	* @param string $name Clean driver name
	*
	* @return string Prepared driver name
	*/
	public static function prepare_driver_name($name)
	{
		return str_replace('.', '_', $name);
	}

	/**
	* Check if avatar is enabled
	*
	* @param object $driver Avatar driver object
	*
	* @return bool True if avatar is enabled, false if it's disabled
	*/
	public function is_enabled($driver)
	{
		$config_name = preg_replace('#^phpbb_avatar_driver_#', '', get_class($driver));

		return $this->config["allow_avatar_{$config_name}"];
	}
}