<?php
/*
 * Copyright 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
require_once realpath(dirname(__FILE__) . '/../../../autoload.php');

/**
 * Psr logging class based on the PSR-3 standard.
 *
 * This logger will delegate all logging to a PSR-3 compatible logger specified
 * with the `Google_Logger_Psr::setLogger()` method.
 */
class Google_Logger_Psr extends Google_Logger_Abstract
{

    /**
     *
     * @param Psr\Log\LoggerInterface $logger
     *            The PSR-3 logger
     */
    private $logger;

    /**
     *
     * @param Google_Client $client
     *            The current Google client
     * @param Psr\Log\LoggerInterface $logger
     *            PSR-3 logger where logging will be delegated.
     */
    public function __construct(Google_Client $client, /*Psr\Log\LoggerInterface*/ $logger = null)
    {
        parent::__construct($client);
        if ($logger) {
            $this->setLogger($logger);
        }
    }

    /**
     * Sets the PSR-3 logger where logging will be delegated.
     *
     * NOTE: The `$logger` should technically implement
     * `Psr\Log\LoggerInterface`, but we don't explicitly require this so that
     * we can be compatible with PHP 5.2.
     *
     * @param Psr\Log\LoggerInterface $logger
     *            The PSR-3 logger
     */
    public function setLogger(/*Psr\Log\LoggerInterface*/ $logger)
    {
        $this->logger = $logger;
    }

    /**
     * @ERROR!!!
     */
    public function shouldHandle($level)
    {
        return isset($this->logger) && parent::shouldHandle($level);
    }

    /**
     * @ERROR!!!
     */
    public function log($level, $message, array $context = array())
    {
        if (! $this->shouldHandle($level)) {
            return false;
        }
        if ($context) {
            $this->reverseJsonInContext($context);
        }
        $levelName = is_int($level) ? array_search($level, self::$levels) : $level;
        $this->logger->log($levelName, $message, $context);
    }

    /**
     * @ERROR!!!
     */
    protected function write($message, array $context = array())
    {}
}
