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<?php
/**
 * ShellCommand class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright 2008-2013 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * ShellCommand executes the specified Web application and provides a shell for interaction.
 *
 * @property string $help The help information for the shell command.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package system.cli.commands
 * @since 1.0
 */
class ShellCommand extends CConsoleCommand
{
	/**
	 * @return string the help information for the shell command
	 */
	public function getHelp()
	{
		return <<<EOD
USAGE
  yiic shell [entry-script | config-file]

DESCRIPTION
  This command allows you to interact with a Web application
  on the command line. It also provides tools to automatically
  generate new controllers, views and data models.

It is recommended that you execute this command under
  the directory that contains the entry script file of
  the Web application.

PARAMETERS
 * entry-script | config-file: optional, the path to
   the entry script file or the configuration file for
   the Web application. If not given, it is assumed to be
   the 'index.php' file under the current directory.

EOD;
	}

/**
	 * Execute the action.
	 * @param array $args command line parameters specific for this command
	 */
	public function run($args)
	{
		if(!isset($args[0]))
			$args[0]='index.php';
		$entryScript=isset($args[0]) ? $args[0] : 'index.php';
		if(($entryScript=realpath($args[0]))===false || !is_file($entryScript))
			$this->usageError("{$args[0]} does not exist or is not an entry script file.");

// fake the web server setting
		$cwd=getcwd();
		chdir(dirname($entryScript));
		$_SERVER['SCRIPT_NAME']='/'.basename($entryScript);
		$_SERVER['REQUEST_URI']=$_SERVER['SCRIPT_NAME'];
		$_SERVER['SCRIPT_FILENAME']=$entryScript;
		$_SERVER['HTTP_HOST']='localhost';
		$_SERVER['SERVER_NAME']='localhost';
		$_SERVER['SERVER_PORT']=80;

// reset context to run the web application
		restore_error_handler();
		restore_exception_handler();
		Yii::setApplication(null);
		Yii::setPathOfAlias('application',null);

ob_start();
		$config=require($entryScript);
		ob_end_clean();

// oops, the entry script turns out to be a config file
		if(is_array($config))
		{
			chdir($cwd);
			$_SERVER['SCRIPT_NAME']='/index.php';
			$_SERVER['REQUEST_URI']=$_SERVER['SCRIPT_NAME'];
			$_SERVER['SCRIPT_FILENAME']=$cwd.DIRECTORY_SEPARATOR.'index.php';
			Yii::createWebApplication($config);
		}

restore_error_handler();
		restore_exception_handler();

$yiiVersion=Yii::getVersion();
		echo <<<EOD
Yii Interactive Tool v1.1 (based on Yii v{$yiiVersion})
Please type 'help' for help. Type 'exit' to quit.
EOD;
		$this->runShell();
	}

protected function runShell()
	{
		// disable E_NOTICE so that the shell is more friendly
		error_reporting(E_ALL ^ E_NOTICE);

$_runner_=$this->createCommandRunner();
		$this->addCommands($_runner_);
		$_commands_=$_runner_->commands;
		$log=Yii::app()->log;

while(($_line_=$this->prompt("\n>>"))!==false)
		{
			$_line_=trim($_line_);
			if($_line_==='exit')
				return;
			try
			{
				$_args_=preg_split('/[\s,]+/',rtrim($_line_,';'),-1,PREG_SPLIT_NO_EMPTY);
				if(isset($_args_[0]) && isset($_commands_[$_args_[0]]))
				{
					$_command_=$_runner_->createCommand($_args_[0]);
					array_shift($_args_);
					$_command_->init();
					$_command_->run($_args_);
				}
				else
				{
					try
					{
						$evalResult = eval($_line_ . ';');
					}
					catch (ParseError $e)
					{
						$evalResult = false;
					}

echo $evalResult;
				}
			}
			catch(Exception $e)
			{
				if($e instanceof ShellException)
					echo $e->getMessage();
				else
					echo $e;
			}
		}
	}

/**
	 * Creates a commands runner
	 * @return CConsoleCommandRunner
	 * @since 1.1.16
	 */
	protected function createCommandRunner()
	{
		return new CConsoleCommandRunner;
	}

/**
	 * Adds commands to runner
	 * @param CConsoleCommandRunner $runner
	 * @since 1.1.16
	 */
	protected function addCommands(CConsoleCommandRunner $runner)
	{
		$runner->addCommands(Yii::getPathOfAlias('system.cli.commands.shell'));
		$runner->addCommands(Yii::getPathOfAlias('application.commands.shell'));
		if(($_path_=@getenv('YIIC_SHELL_COMMAND_PATH'))!==false)
			$runner->addCommands($_path_);
	}
}

class ShellException extends CException
{
}