/**
* Action to view a given post
*
* This action should only be called via GET
*
* The expected HTTP parameters are:
* <ul>
* <li>id: Id of the post (via HTTP GET)</li>
* </ul>
*
* The views are:
* <ul>
* <li>posts/view: If post is successfully loaded (via include). Includes these view variables:</li>
* <ul>
* <li>post: The current Post retrieved</li>
* <li>comment: The current Comment instance, empty or
* being added (but not validated)</li>
* </ul>
* </ul>
*
* @throws Exception If no such post of the given id is found
* @return void
*
*/
public function view()
{
if (!isset($_GET["id"])) {
throw new Exception("id is mandatory");
}
$postid = $_GET["id"];
// find the Post object in the database
$post = $this->postMapper->findByIdWithComments($postid);
if ($post == NULL) {
throw new Exception("no such post with id: " . $postid);
}
// put the Post object to the view
$this->view->setVariable("post", $post);
// check if comment is already on the view (for example as flash variable)
// if not, put an empty Comment for the view
$comment = $this->view->getVariable("comment");
$this->view->setVariable("comment", $comment == NULL ? new Comment() : $comment);
// render the view (/view/posts/view.php)
$this->view->render("posts", "view");
}