<?php
/*
 * Limb PHP Framework
 *
 * @link http://limb-project.com 
 * @copyright  Copyright &copy; 2004-2007 BIT(http://bit-creative.com)
 * @license    LGPL http://www.gnu.org/copyleft/lesser.html 
 */
lmb_require('limb/cli/src/lmbCliBaseCmd.class.php');

@define('LIMB_CLI_INCLUDE_PATH', 'cli;limb/*/cli');

/**
 * class lmbCliRunner.
 *
 * @package cli
 * @version $Id$
 */
class lmbCliRunner
{
  protected $input;
  protected $output;
  protected $return_on_exit = false;
  protected $use_exception = false;
  protected $search_path;

  function __construct($input, $output)
  {
    $this->input = $input;
    $this->output = $output;
    $this->search_path = LIMB_CLI_INCLUDE_PATH;
  }

  static function commandToClass($name)
  {
    return lmb_camel_case(self :: sanitizeName($name)) . 'CliCmd';
  }

  static function actionToMethod($name)
  {
    return lmb_camel_case(self :: sanitizeName($name));
  }

  static function sanitizeName($name)
  {
    $name = preg_replace('~\W~', '_', $name);
    return $name;
  }

  function setCommandSearchPath($path)
  {
    $this->search_path = $path;
  }

  function returnOnExit($flag = true)
  {
    $this->return_on_exit = $flag;
  }

  function throwOnError($flag = true)
  {
    $this->use_exception = $flag;
  }

  function execute()
  {
    if(!$command_name = $this->input->getArgument(0))
      $this->_error('You should specify command');

    if(!$command = $this->_mapCommandToObject($command_name))
      $this->_error("Command '$command_name' is invalid(could not map it to the command class)");

    $argv = $this->input->getArgv();
    array_shift($argv);

    $action = 'execute';

    if($arg = $this->input->getArgument(1))
    {
      $method = self :: actionToMethod($arg);
      if(method_exists($command, $method))
      {
        $action = $method;
        array_shift($argv);
      }
    }
    return $this->_exit((int)$command->$action($argv));
  }

  protected function _exit($code = 0)
  {
    if($this->return_on_exit)
      return $code;
    else
      exit($code);
  }

  protected function _error($message = '')
  {
    if($this->use_exception)
      throw new lmbException($message);
    else
      exit(1);
  }

  protected function _mapCommandToObject($command_name)
  {
    $items = explode(';', $this->search_path);
    foreach($items as $item)
    {
      $class = self :: commandToClass($command_name);
      $path = $item . '/' . $class . '.class.php';

      if($resolved = lmb_glob($path))
      {
        require_once($resolved[0]);
        return new $class($this->output);
      }
    }
  }
}
?>