/**
 * This class will use Symfony's logging system adding some ANSI color codes
 * depending on the severity/type of the message. The goal is to provide a quick
 * visual recognition of log lines on shell.
 *
 * TODO:
 * Actually do some inheritance here and extend Symonfy intself
 *
 * WARNING:
 * By using this class you will find some weird codes in the web debug interface.
 *
 * @author Guillermo Gutiérrez guille@nianoniano.com
 */
class Logger {
	// These are the log levels defined in Symfony
	const EMERG = 0; // System is unusable
	const ALERT = 1; // Immediate action required
	const CRIT = 2; // Critical conditions
	const ERR = 3; // Error conditions
	const WARNING = 4; // Warning conditions
	const NOTICE = 5; // Normal but significant
	const INFO = 6; // Informational
	const DEBUG = 7; // Debug-level messages
 
	const ANSI_END = "\033[0m";
 
	/**
	 * Adds a message to the log
	 *
	 * @param string $msg The message to be added
	 * @param string $module The module that is producing this message. Default: _DEBUG_
	 * @param string $severity The severity of the message. Must be one of the class constants
	 */
	public static function log($msg, $module = '_DEBUG_', $severity = self::DEBUG) {
		// I'm sure that there is a more elegant way to do this
		if (!in_array($severity, array(
			self::EMERG,
			self::ALERT,
			self::CRIT,
			self::ERR,
			self::WARNING,
			self::NOTICE,
			self::INFO,
			self::DEBUG
			))) {
			throw new Exception(__METHOD__ . " requires a valid severity code");
		}
		switch ($severity) {
			case self::EMERG:
			case self::ALERT:
				$style = "\033[0;49;31;1m";
				break;
			case self::CRIT:
			case self::ERR:
				$style = "\033[0;49;31m";
				break;
			case self::WARNING:
				$style = "\033[0;49;33;1m";
				break;
			case self::NOTICE:
			case self::INFO:
				$style = "\033[0;49;32m";
				break;
			case self::DEBUG:
				$style = "\033[0;49;36m";
				break;
		}
		$msg = $style."{".$module."} ".$msg.self::ANSI_END;
		try {
			sfContext::getInstance()->getLogger()->log($msg, $severity);
		} catch (Exception $e) {
			// Replace this with something else in production environments!
			echo $msg."\n";
		}
	}
 
	/**
	 * This method is a shortcut for self::log(print_r($someArray, true), $module, $severity);
	 * @param Array $array Array to be logged
	 * @param string $module The module that is producing this message. Default: _DEBUG_
	 * @param string $severity The severity of the message. Must be one of the class constants
	 */
	public static function printR($array, $module = '_DEBUG_', $severity = self::DEBUG) {
		self::log(print_r($array, true), $module, $severity);
	}
}