<?php
/**
 * Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

namespace OC;

/**
 * logging utilities
 *
 * This is a stand in, this should be replaced by a Psr\Log\LoggerInterface
 * compatible logger. See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
 * for the full interface specification.
 *
 * MonoLog is an example implementing this interface.
 */

class Log {
	const DEBUG=0;
	const INFO=1;
	const WARN=2;
	const ERROR=3;
	const FATAL=4;

	const NOTICE=5;
	const CRITICAL=6;
	const ALERT=7;

	/**
	 * System is unusable.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function emergency($message, array $context = array())
	{
		$this->log(self::FATAL, $message, $context);
	}

	/**
	 * Action must be taken immediately.
	 *
	 * Example: Entire website down, database unavailable, etc. This should
	 * trigger the SMS alerts and wake you up.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function alert($message, array $context = array())
	{
		$this->log(self::ALERT, $message, $context);
	}

	/**
	 * Critical conditions.
	 *
	 * Example: Application component unavailable, unexpected exception.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function critical($message, array $context = array())
	{
		$this->log(self::CRITICAL, $message, $context);
	}

	/**
	 * Runtime errors that do not require immediate action but should typically
	 * be logged and monitored.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function error($message, array $context = array())
	{
		$this->log(self::ERROR, $message, $context);
	}

	/**
	 * Exceptional occurrences that are not errors.
	 *
	 * Example: Use of deprecated APIs, poor use of an API, undesirable things
	 * that are not necessarily wrong.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function warning($message, array $context = array())
	{
		$this->log(self::WARN, $message, $context);
	}

	/**
	 * Normal but significant events.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function notice($message, array $context = array())
	{
		$this->log(self::NOTICE, $message, $context);
	}

	/**
	 * Interesting events.
	 *
	 * Example: User logs in, SQL logs.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function info($message, array $context = array())
	{
		$this->log(self::INFO, $message, $context);
	}

	/**
	 * Detailed debug information.
	 *
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	public function debug($message, array $context = array())
	{
		$this->log(self::DEBUG, $message, $context);
	}

	/**
	 * Logs with an arbitrary level.
	 *
	 * @param mixed $level
	 * @param string $message
	 * @param array $context
	 * @return null
	 */
	protected function log($level, $message, array $context = array())
	{
		if (isset($context['app'])) {
			$app = $context['app'];
		} else {
			$app = 'no app in context';
		}
		\OC_Log::write($app, $message, $level);
	}
}