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<?php
/**
* SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OCA\Comments\Collaboration;
use OCP\Collaboration\AutoComplete\ISorter;
use OCP\Comments\ICommentsManager;
class CommentersSorter implements ISorter {
public function __construct(
private ICommentsManager $commentsManager,
) {
}
public function getId(): string {
return 'commenters';
}
/**
* Sorts people who commented on the given item atop (descelating) of the
* others
*
* @param array &$sortArray
* @param array $context
*/
public function sort(array &$sortArray, array $context): void {
$commenters = $this->retrieveCommentsInformation($context['itemType'], $context['itemId']);
if (count($commenters) === 0) {
return;
}
foreach ($sortArray as $type => &$byType) {
if (!isset($commenters[$type])) {
continue;
}
// at least on PHP 5.6 usort turned out to be not stable. So we add
// the current index to the value and compare it on a draw
$i = 0;
$workArray = array_map(function ($element) use (&$i) {
return [$i++, $element];
}, $byType);
usort($workArray, function ($a, $b) use ($commenters, $type) {
$r = $this->compare($a[1], $b[1], $commenters[$type]);
if ($r === 0) {
$r = $a[0] - $b[0];
}
return $r;
});
// and remove the index values again
$byType = array_column($workArray, 1);
}
}
/**
* @return array<string, array<string, int>>
*/
protected function retrieveCommentsInformation(string $type, string $id): array {
$comments = $this->commentsManager->getForObject($type, $id);
if (count($comments) === 0) {
return [];
}
$actors = [];
foreach ($comments as $comment) {
if (!isset($actors[$comment->getActorType()])) {
$actors[$comment->getActorType()] = [];
}
if (!isset($actors[$comment->getActorType()][$comment->getActorId()])) {
$actors[$comment->getActorType()][$comment->getActorId()] = 1;
} else {
$actors[$comment->getActorType()][$comment->getActorId()]++;
}
}
return $actors;
}
protected function compare(array $a, array $b, array $commenters): int {
$a = $a['value']['shareWith'];
$b = $b['value']['shareWith'];
$valueA = $commenters[$a] ?? 0;
$valueB = $commenters[$b] ?? 0;
return $valueB - $valueA;
}
}
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