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<?php
namespace Digitigrade\Timeline;
use Digitigrade\Model\Note;
use Digitigrade\Model\UserAccount;
abstract class Timeline {
// TODO: currently making this number up. probably should be modifiable somewhere
private const RESULTS_PER_PAGE = 20;
/**
* Gets a pageful of items to be included in the timeline
* @param int $page page number to return (0-indexed)
* @return TimelineItem[]
*/
public function getPage(int $page = 0): array {
return $this->getItemsFiltered(self::RESULTS_PER_PAGE, self::RESULTS_PER_PAGE * $page);
}
/**
* @return TimelineItem[]
*/
private function getItemsFiltered(int $limit, int $offset): array {
$user = UserAccount::findByCurrentSession();
$items = $this->getItems($limit, $offset);
if ($user == null)
return $items;
// filter out notes from blocked users
return array_filter($items, function (TimelineItem $item) use ($user) {
$obj = $item->getObject();
if ($obj instanceof Note && $user->actor->blocks($obj->author)) {
return false;
}
return true;
});
}
/**
* Gets a selection of items to be included in the timeline
* @param int $limit max number of items to return
* @param int $offset number of items to skip at first
* @return TimelineItem[]
*/
abstract protected function getItems(int $limit, int $offset): array;
}
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