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<?php
class ListPost extends TPage
{
/**
* Initializes the repeater.
* This method is invoked by the framework when initializing the page
* @param mixed event parameter
*/
public function onInit($param)
{
parent::onInit($param);
if(!$this->IsPostBack) // if the page is requested the first time
{
// get the total number of posts available
$this->Repeater->VirtualItemCount=PostRecord::finder()->count();
// populates post data into the repeater
$this->populateData();
}
}
/**
* Event handler to the OnPageIndexChanged event of the pager.
* This method is invoked when the user clicks on a page button
* and thus changes the page of posts to display.
*/
public function pageChanged($sender,$param)
{
// change the current page index to the new one
$this->Repeater->CurrentPageIndex=$param->NewPageIndex;
// re-populate data into the repeater
$this->populateData();
}
/**
* Determines which page of posts to be displayed and
* populates the repeater with the fetched data.
*/
protected function populateData()
{
$offset=$this->Repeater->CurrentPageIndex*$this->Repeater->PageSize;
$limit=$this->Repeater->PageSize;
if($offset+$limit>$this->Repeater->VirtualItemCount)
$limit=$this->Repeater->VirtualItemCount-$offset;
$this->Repeater->DataSource=$this->getPosts($offset,$limit);
$this->Repeater->dataBind();
}
/**
* Fetches posts from database with offset and limit.
*/
protected function getPosts($offset, $limit)
{
// Construts a query criteria
$criteria=new TActiveRecordCriteria;
$criteria->OrdersBy['create_time']='desc';
$criteria->Limit=$limit;
$criteria->Offset=$offset;
// query for the posts with the above criteria and with author information
return PostRecord::finder()->withAuthor()->findAll($criteria);
}
}
?>
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