%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\Recommendations\Service;
use OCP\IPreview;
use OCP\IUser;
use function array_merge;
use function array_reduce;
use function array_slice;
use function usort;
class RecommendationService {
private const MAX_RECOMMENDATIONS = 7;
/** @var IRecommendationSource[] */
private array $sources;
private IPreview $previewManager;
public function __construct(RecentlyCommentedFilesSource $recentlyCommented,
RecentlyEditedFilesSource $recentlyEdited,
RecentlySharedFilesSource $recentlyShared,
IPreview $previewManager) {
$this->sources = [
$recentlyCommented,
$recentlyEdited,
$recentlyShared,
];
$this->previewManager = $previewManager;
}
/**
* @param IRecommendation[] $recommendations
*
* @return IRecommendation[]
*/
private function sortRecommendations(array $recommendations): array {
usort($recommendations, function (IRecommendation $a, IRecommendation $b) {
return $b->getTimestamp() - $a->getTimestamp();
});
return $recommendations;
}
/**
* @param IRecommendation[] $recommendations
*
* @return IRecommendation[]
*/
private function addPreviews(array $recommendations): array {
foreach ($recommendations as $recommendation) {
if ($this->previewManager->isAvailable($recommendation->getNode())) {
$recommendation->setHasPreview(true);
}
}
return $recommendations;
}
/**
* @param IUser $user
*
* @return IRecommendation[]
*/
public function getRecommendations(IUser $user, int $max = self::MAX_RECOMMENDATIONS): array {
$all = array_reduce($this->sources, function (array $carry, IRecommendationSource $source) use ($user) {
return array_merge($carry, $source->getMostRecentRecommendation($user, self::MAX_RECOMMENDATIONS));
}, []);
$sorted = $this->sortRecommendations($all);
$topX = $this->getDeduplicatedSlice($sorted, $max);
return $this->addPreviews($topX);
}
/**
* Deduplicate the sorted recommendations and return the top $max picks
*
* The first (most recent) recommendation wins, hence eventually show its
* recommendation reason
*
* @param IRecommendation[] $recommendations
* @param int $max
* @return IRecommendation[]
*/
private function getDeduplicatedSlice(array $recommendations, int $max): array {
$picks = [];
foreach ($recommendations as $recommendation) {
if (empty(array_filter($picks, function (IRecommendation $rec) use ($recommendation) {
return $recommendation->getNode()->getId() === $rec->getNode()->getId();
}))) {
$picks[] = $recommendation;
}
}
return array_slice($picks, 0, $max);
}
}
Zerion Mini Shell 1.0