<?php
/**
 * FormCommand class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2010 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 * @version $Id$
 */

/**
 * FormCommand generates a form view based on a specified model.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id$
 * @package system.cli.commands.shell
 * @since 1.0
 */
class FormCommand extends CConsoleCommand
{
	/**
	 * @var string the directory that contains templates for the form command.
	 * Defaults to null, meaning using 'framework/cli/views/shell/form'.
	 * If you set this path and some views are missing in the directory,
	 * the default views will be used.
	 */
	public $templatePath;

	public function getHelp()
	{
		return <<<EOD
USAGE
  form <model-class> <view-name>

DESCRIPTION
  This command generates a form view that can be used to collect inputs
  for the specified model.

PARAMETERS
 * model-class: required, model class. This can be either the name of
   the model class (e.g. 'ContactForm') or the path alias of the model
   class file (e.g. 'application.models.ContactForm').

 * view-name: required, the name of the view to be generated. This should
   be the path alias of the view script (e.g. 'application.views.site.contact').

EXAMPLES
 * Generates the view script for the 'ContactForm' model:
        form ContactForm application.views.site.contact

EOD;
	}

	/**
	 * Execute the action.
	 * @param array command line parameters specific for this command
	 */
	public function run($args)
	{
		if(!isset($args[0],$args[1]))
		{
			echo "Error: both model class and view name are required.\n";
			echo $this->getHelp();
			return;
		}
		$modelClass=Yii::import($args[0],true);
		if(is_subclass_of($modelClass,'CActiveRecord'))
			$attributes=CActiveRecord::model($modelClass)->getSafeAttributeNames();
		else
		{
			$model=new $modelClass;
			$attributes=$model->getSafeAttributeNames();
		}

		$templatePath=$this->templatePath===null?YII_PATH.'/cli/views/shell/form':$this->templatePath;
		$viewPath=Yii::getPathOfAlias($args[1]);
		$viewName=basename($viewPath);
		$viewPath.='.php';
		$params=array(
			'modelClass'=>$modelClass,
			'viewName'=>$viewName,
			'attributes'=>$attributes,
		);
		$list=array(
			basename($viewPath)=>array(
				'source'=>$templatePath.'/form.php',
				'target'=>$viewPath,
				'callback'=>array($this,'generateForm'),
				'params'=>$params,
			),
		);

		$this->copyFiles($list);

		$actionFile=$templatePath.'/action.php';
		if(!is_file($actionFile))  // fall back to default ones
			$actionFile=YII_PATH.'/cli/views/shell/form/action.php';

		echo "The following form view has been successfully created:\n";
		echo "\t$viewPath\n\n";
		echo "You may use the following code in your controller action:\n\n";
		echo $this->renderFile($actionFile,$params,true);
		echo "\n";
	}

	public function generateForm($source,$params)
	{
		if(!is_file($source))  // fall back to default ones
			$source=YII_PATH.'/cli/views/shell/form/'.basename($source);

		return $this->renderFile($source,$params,true);
	}

	public function class2id($className)
	{
		if(strrpos($className,'Form')===strlen($className)-4)
			$className=substr($className,0,strlen($className)-4);
		return trim(strtolower(str_replace('_','-',preg_replace('/(?<![A-Z])[A-Z]/', '-\0', $className))),'-');
	}
}