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<?php
class EditPost extends TPage
{
/**
* Initializes the inputs with existing post data.
* This method is invoked by the framework when the page is being initialized.
* @param mixed event parameter
*/
public function onInit($param)
{
parent::onInit($param);
// Retrieves the existing user data. This is equivalent to:
// $postRecord=$this->getPost();
$postRecord=$this->Post;
// Authorization check: only the author or the administrator can edit the post
if($postRecord->author_id!==$this->User->Name && !$this->User->IsAdmin)
throw new THttpException(500,'You are not allowed to edit this post.');
if(!$this->IsPostBack) // if the page is initially requested
{
// Populates the input controls with the existing post data
$this->TitleEdit->Text=$postRecord->title;
$this->ContentEdit->Text=$postRecord->content;
}
}
/**
* Saves the post if all inputs are valid.
* This method responds to the OnClick event of the "Save" button.
* @param mixed event sender
* @param mixed event parameter
*/
public function saveButtonClicked($sender,$param)
{
if($this->IsValid) // when all validations succeed
{
// Retrieves the existing user data. This is equivalent to:
// $postRecord=$this->getPost();
$postRecord=$this->Post;
// Fetches the input data
$postRecord->title=$this->TitleEdit->SafeText;
$postRecord->content=$this->ContentEdit->SafeText;
// saves to the database via Active Record mechanism
$postRecord->save();
// redirects the browser to the ReadPost page
$url=$this->Service->constructUrl('posts.ReadPost',array('id'=>$postRecord->post_id));
$this->Response->redirect($url);
}
}
/**
* Returns the post data to be editted.
* @return PostRecord the post data to be editted.
* @throws THttpException if the post data is not found.
*/
protected function getPost()
{
// the ID of the post to be editted is passed via GET parameter 'id'
$postID=(int)$this->Request['id'];
// use Active Record to look for the specified post ID
$postRecord=PostRecord::finder()->findByPk($postID);
if($postRecord===null)
throw new THttpException(500,'Post is not found.');
return $postRecord;
}
}
?>
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