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<?php
namespace Flow\Formatter;
use Flow\Data\ManagerGroup;
use Flow\Exception\FlowException;
use Flow\Model\UUID;
/**
* This class is necessary so we can inject the name of
* a topic title into the category. Once we have pages
* in the topic namespace named after the topic themselves
* this can be simplified down to only pre-load the workflow
* and not the related posts.
*/
class CategoryViewerQuery {
/**
* @var PostRevision[]
*/
protected $posts = array();
/**
* @var Workflow[]
*/
protected $workflows = array();
/**
* @var ManagerGroup
*/
protected $storage;
public function __construct( ManagerGroup $storage ) {
$this->storage = $storage;
}
/**
* Accepts a result set as sent out to the CategoryViewer::doCategoryQuery
* hook.
*
* @param ResultWrapper|array $rows
*/
public function loadMetadataBatch( $rows ) {
$neededPosts = array();
$neededWorkflows = array();
foreach ( $rows as $row ) {
if ( $row->page_namespace != NS_TOPIC ) {
continue;
}
$uuid = UUID::create( strtolower( $row->page_title ) );
if ( $uuid ) {
$alpha = $uuid->getAlphadecimal();
$neededPosts[$alpha] = array( 'rev_type_id' => $uuid );
$neededWorkflows[$alpha] = $uuid;
}
}
if ( !$neededPosts ) {
return;
}
$this->posts = $this->storage->findMulti(
'PostRevision',
$neededPosts,
array( 'sort' => 'rev_id', 'order' => 'DESC', 'limit' => 1 )
);
$workflows = $this->storage->getMulti(
'Workflow',
$neededWorkflows
);
// @todo fixme: these should have come back with the apropriate array
// key since we passed it in above, but didn't.
foreach ( $workflows as $workflow ) {
$this->workflows[$workflow->getId()->getAlphadecimal()] = $workflow;
}
}
public function getResult( UUID $uuid ) {
$alpha = $uuid->getAlphadecimal();
// Minimal set of data needed for the CategoryViewFormatter
$row = new FormatterRow;
if ( !isset( $this->posts[$alpha] ) ) {
throw new FlowException( "A required post has not been loaded: $alpha" );
}
$row->revision = reset( $this->posts[$alpha] );
if ( !isset( $this->workflows[$alpha] ) ) {
throw new FlowException( "A required workflow has not been loaded: $alpha" );
}
$row->workflow = $this->workflows[$alpha];
return $row;
}
}
|
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