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<?php
namespace JsonApi\Routes\Blubber;
use JsonApi\Errors\BadRequestException;
use JsonApi\Errors\RecordNotFoundException;
use JsonApi\JsonApiController;
use JsonApi\Routes\TimestampTrait;
use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Http\Message\ResponseInterface as Response;
/**
* Displays all blubber threads of a certain context ID.
*/
class ThreadsIndex extends JsonApiController
{
use TimestampTrait, FilterTrait;
protected $allowedFilteringParameters = ['since', 'before', 'search', 'context-type', 'context-id'];
protected $allowedIncludePaths = ['author', 'comments', 'context', 'mentions'];
protected $allowedPagingParameters = ['offset', 'limit'];
/**
* @SuppressWarnings(PHPMD.UnusedFormalParameter)
*/
public function __invoke(Request $request, Response $response, $args)
{
$this->validateFilters();
$filters = $this->getFilters();
$contextType = $args['type'];
$contextId = isset($args['id']) ? $args['id'] : null;
if ($contextType === 'all') {
if (isset($filters['context-type'])) {
$contextType = $filters['context-type'];
}
if (isset($filters['context-id'])) {
$contextId = $filters['context-id'];
}
}
if (!in_array($contextType, ['all', 'public', 'private', 'course', 'institute'])) {
throw new BadRequestException('Wrong context type.');
}
[$threads, $total] = match ($contextType) {
'all' => $this->getAllThreads($filters, $this->getUser($request)),
'public' => $this->getPublicThreads($this->getUser($request)),
'private' => $this->getPrivateThreads($this->getUser($request), $contextId),
'course' => $this->getCourseThreads($this->getUser($request), $contextId),
'institute' => $this->getInstituteThreads($this->getUser($request), $contextId),
};
return $this->getPaginatedContentResponse($threads, $total);
}
private function getAllThreads(array $filters, \User $observer)
{
list($offset, $limit) = $this->getOffsetAndLimit();
$threads = \BlubberThread::findMyGlobalThreads(
$offset + $limit + 1,
$filters['since'],
$filters['before'],
$observer->id,
$filters['search']
);
$hasMore = count($threads) < $offset + $limit + 1;
$total = $hasMore ? count($threads) : null;
return [array_slice($threads, $offset, $limit), $total];
}
private function getPublicThreads(\User $observer)
{
return $this->paginateThreads(
$this->upgradeAndFilterThreads($observer, \BlubberThread::findBySQL("context_type = 'public'"))
);
}
private function getPrivateThreads(\User $observer, string $userID)
{
if (!($user = \User::find($userID))) {
throw new RecordNotFoundException();
}
$query = 'SELECT a.thread_id FROM blubber_mentions a
JOIN blubber_mentions b
ON a.thread_id = b.thread_id
WHERE a.user_id = ? AND b.user_id = ?
AND a.external_contact = 0 AND b.external_contact = 0';
$statement = \DBManager::get()->prepare($query);
$statement->execute([$observer->id, $user->id]);
$threadIDs = $statement->fetchAll(\PDO::FETCH_COLUMN, 0);
$threads = $this->upgradeAndFilterThreads($observer, \BlubberThread::findMany($threadIDs, 'ORDER BY mkdate'));
return $this->paginateThreads($threads);
}
private function getCourseThreads(\User $observer, string $courseID)
{
if (!($course = \Course::find($courseID))) {
throw new RecordNotFoundException();
}
return $this->paginateThreads(\BlubberThread::findBySeminar($course->id, false, $observer->id));
}
private function getInstituteThreads(\User $observer, string $instituteID)
{
if (!($institute = \Institute::find($instituteID))) {
throw new RecordNotFoundException();
}
return $this->paginateThreads(\BlubberThread::findByInstitut($institute->id, false, $observer->id));
}
private function upgradeAndFilterThreads(\User $user, array $threads)
{
return array_filter(
array_map(function ($thread) {
return \BlubberThread::upgradeThread($thread);
}, $threads),
function ($thread) use ($user) {
return $thread->isVisibleInStream() && $thread->isReadable($user->id);
}
);
}
private function paginateThreads($threads)
{
list($offset, $limit) = $this->getOffsetAndLimit();
$total = count($threads);
$threads = array_slice($threads, $offset, $limit);
return [$threads, $total];
}
}
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