UserContextResolver.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\News\Domain;
 
use ILIAS\News\Data\NewsContext;
use ILIAS\News\Data\NewsCriteria;
use ILIAS\News\Persistence\NewsCache;
 
class UserContextResolver
{
    public function __construct(
        protected readonly \ilFavouritesDBRepository $favourites_repository,
        protected readonly \ilAccessHandler $access,
        protected readonly \ilTree $tree,
        protected readonly NewsCache $cache
    ) {
    }
 
    public function getAccessibleContexts(\ilObjUser $user, NewsCriteria $criteria): array
    {
        // 1. Try cache layer
        $cached_contexts = $this->cache->getUserContextAccess($user->getId(), $criteria);
        if ($cached_contexts !== null) {
            return $cached_contexts;
        }
 
        // 2. Resolve contexts
        $contexts = $this->resolveUserContexts($user, $criteria);
 
        // 3. Cache the result
        $this->cache->storeUserContextAccess($user->getId(), $criteria, $contexts);
 
        return $contexts;
    }
 
    private function resolveUserContexts(\ilObjUser $user, NewsCriteria $criteria): array
    {
        $contexts = [];
 
        // Get user's personal desktop items
        if ($this->shouldIncludePersonalDesktop($user)) {
            $contexts = array_merge($contexts, $this->getPersonalDesktopContexts($user));
        }
 
        // Get user's memberships
        $contexts = array_merge($contexts, $this->getMembershipContexts($user));
 
        // Remove duplicates and filter by access
        return $this->filterContexts($user, $contexts, $criteria);
    }
 
    private function shouldIncludePersonalDesktop(\ilObjUser $user): bool
    {
        return $user->getPref('pd_items_news') !== 'n';
    }
 
    private function getPersonalDesktopContexts(\ilObjUser $user): array
    {
        $contexts = [];
 
        foreach ($this->favourites_repository->getFavouritesOfUser($user->getId()) as $item) {
            $contexts[] = new NewsContext($item['ref_id'], $item['obj_id'], $item['type']);
        }
        return $contexts;
    }
 
    private function getMembershipContexts(\ilObjUser $user): array
    {
        $contexts = [];
        $memberships = \ilParticipants::_getMembershipByType($user->getId(), ['crs', 'grp']);
 
        foreach ($memberships as $obj_id) {
            $contexts = array_merge(
                $contexts,
                array_map(fn($ref_id) => new NewsContext($ref_id, $obj_id), \ilObject::_getAllReferences($obj_id)),
            );
        }
        return $contexts;
    }
 
    private function filterContexts(\ilObjUser $user, array $contexts, NewsCriteria $criteria): array
    {
        $unique_contexts = [];
 
        foreach ($contexts as $context) {
            if (isset($unique_contexts[$context->getRefId()])) {
                continue;
            }
 
            if (
                !$criteria->isOnlyPublic() &&
                !$this->access->checkAccessOfUser($user->getId(), 'read', '', $context->getRefId())
            ) {
                continue;
            }
 
            $unique_contexts[$context->getRefId()] = $context;
        }
 
        return array_values($unique_contexts);
    }
}