<?php
//

/**
 * Class for handling errors within the program
 */
class Error
{

  private static $errorCodes = array( ERROR_DBCON   => 'Database connection error',
                              ERROR_IMPROPERUSE     => 'Invalid use of a method',
                              ERROR_BADQUERY        => 'Bad SQL query',
                              ERROR_CONFIG          => 'Configuration error',
                              ERROR_RECURSION       => 'Recursion limit reached on method');
  public $error_code;
  public $error_description;

        /**
        * $error_description is for passing in custom errors not defined in the enum above.
        */
        public function __construct($error_code, $error_description = null)
        {
                $logFileName = LOG_FLATFILE;

                $this->error_code = (int) $error_code;

                if(!is_null($error_description))
                        $this->error_description = $error_description;
                else
                        $this->error_description = self::$errorCodes[(int)$error_code];

                if($error_code == ERROR_DBCON)
                {
                        $entry_line = "\n";
                        $entry_line .= date("Y-m-d H:i:s")."\n";
                        $entry_line .= "Error code:        ".$this->error_code."\n";
                        $entry_line .= "Error description: ".$this->error_description.'- '.$error_description."\n";

                        $fp = fopen($logFileName, "a");
                        fputs($fp, $entry_line);
                        fclose($fp);
                }
                else //log error to DB
                {
                        #$result = ErrorLog::addError($this->error_code, $this->error_description.': '.$error_description);
                }
        }

  static function isError( $var )
  {
    if ( gettype($var) == 'object' &&  get_class($var) == 'Error' )
    {
        return true;
    }
    return false;
  }

}
?>