CCodeGenerator

public function actionCode()
{
    $model=$this->prepare();
    if(isset($_GET['id']) && isset($model->files[$_GET['id']]))
    {
        $this->renderPartial('/common/code', array(
            'file'=>$model->files[$_GET['id']],
        ));
    }
    else
        throw new CHttpException(404,'Unable to find the code you requested.');
}

public function actionDiff()
{
    Yii::import('gii.components.TextDiff');

    $model=$this->prepare();
    if(isset($_GET['id']) && isset($model->files[$_GET['id']]))
    {
        $file=$model->files[$_GET['id']];
        if(!in_array($file->type,array('php', 'txt','js','css')))
            $diff=false;
        else if($file->operation===CCodeFile::OP_OVERWRITE)
            $diff=TextDiff::compare(file_get_contents($file->path), $file->content);
        else
            $diff='';

        $this->renderPartial('/common/diff',array(
            'file'=>$file,
            'diff'=>$diff,
        ));
    }
    else
        throw new CHttpException(404,'Unable to find the code you requested.');
}

public function actionIndex()
{
    $model=$this->prepare();
    if($model->files!=array() && isset($_POST['generate'], $_POST['answers']))
    {
        $model->answers=$_POST['answers'];
        $model->status=$model->save() ? CCodeModel::STATUS_SUCCESS : CCodeModel::STATUS_ERROR;
    }

    $this->render('index',array(
        'model'=>$model,
    ));
}

public function getPageTitle()
{
    return 'Gii - '.ucfirst($this->id).' Generator';
}

public function getViewPath()
{
    if($this->_viewPath===null)
    {
        $class=new ReflectionClass(get_class($this));
        $this->_viewPath=dirname($class->getFileName()).DIRECTORY_SEPARATOR.'views';
    }
    return $this->_viewPath;
}

protected function prepare()
{
    if($this->codeModel===null)
        throw new CException(get_class($this).'.codeModel property must be specified.');
    $modelClass=Yii::import($this->codeModel,true);
    $model=new $modelClass;
    $model->loadStickyAttributes();
    if(isset($_POST[$modelClass]))
    {
        $model->attributes=$_POST[$modelClass];
        $model->status=CCodeModel::STATUS_PREVIEW;
        if($model->validate())
        {
            $model->saveStickyAttributes();
            $model->prepare();
        }
    }
    return $model;
}

public function setViewPath($value)
{
    $this->_viewPath=$value;
}