gistfile1.php[345]

<?php

interface Logger
{
    function log ($id, $type, $time, $description);   
}


class Log
{
    
    const INFORMATION = 'i';
    const WARNING = 'w';
    const ERROR = 'e';
    
    protected $loggers = array();
    
    
    function addLogger(Logger $loggerObject)
    {
        $loggers[] = $loggerObject;
    }
    
    
    function logEvent ($id, $type, $description)
    {
        foreach($loggers as $logger)
        {
            $logger->log($id, $type, time(), $description);
        }
    }
}


class FileLogger implements Logger
{
    
    protected $filePath;
    protected $fileResource;
    
    
    function log ($id, $type, $time, $description)
    {
        if (empty($this->filePath))
        {
            throw new LogicException('A file path must be set before calling '.__METHOD__.'().');
        }
        
        if(is_resource($this->fileResource) == false) {
            $this->fileResource = fopen($this->filePath, 'a');
        }
        
        fwrite($this->fileResource, sprintf("%s\t%s\t%d\t%s", $id, $type, $time, $description));
    }
    
    
    function setFilePath ($filePath)
    {
        $this->filePath = $filePath;
    }
}


class DatabaseLogger implements Logger
{
    
    protected $db;
    
    
    function log ($id, $type, $time, $description)
    {
        if(empty($db)) {
            throw new LogicException('A database object must be set before calling '.__METHOD__.'().');
        }
        
        $this->db->query("INSERT INTO log (id, type, time, description) VALUES ($id, $type, $time, $description)");
    }
    
    
    function setDatabase(PDO $db)
    {
        $this->db = $db;
    }
}