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|
<?php
namespace JsonApi\Routes\Courseware\Rel;
use Courseware\Block;
use Courseware\Container;
use JsonApi\Errors\ConflictException;
use JsonApi\Errors\RecordNotFoundException;
use JsonApi\Routes\Courseware\Authority;
use JsonApi\Routes\RelationshipsController;
use Psr\Http\Message\ServerRequestInterface as Request;
class ContainersBlocks extends RelationshipsController
{
protected $allowedPagingParameters = ['offset', 'limit'];
/**
* @SuppressWarnings(PHPMD.UnusedFormalParameter)
*/
protected function fetchRelationship(Request $request, $related)
{
$blocks = $related->blocks;
$total = count($blocks);
list($offset, $limit) = $this->getOffsetAndLimit();
return $this->getPaginatedIdentifiersResponse($blocks->limit($offset, $limit), $total);
}
protected function replaceRelationship(Request $request, $related)
{
$json = $this->validate($request);
$blocks = $this->validateBlocks($this->getUser($request), $json);
$this->replaceBlocks($related, $blocks);
return $this->getCodeResponse(204);
}
protected function findRelated(array $args)
{
if (!($related = \Courseware\Container::find($args['id']))) {
throw new RecordNotFoundException();
}
return $related;
}
protected function authorize(Request $request, $resource)
{
switch ($request->getMethod()) {
case 'GET':
return Authority::canIndexBlocks($this->getUser($request), $resource);
case 'PATCH':
return Authority::canReorderBlocks($this->getUser($request), $resource);
default:
return false;
}
}
/**
* @SuppressWarnings(PHPMD.UnusedFormalParameter)
*/
protected function getRelationshipSelfLink($resource, $schema, $userData)
{
return $schema->getRelationshipSelfLink($resource, \JsonApi\Schemas\Courseware\Container::REL_BLOCKS);
}
/**
* @SuppressWarnings(PHPMD.UnusedFormalParameter)
*/
protected function getRelationshipRelatedLink($resource, $schema, $userData)
{
return $schema->getRelationshipRelatedLink($resource, \JsonApi\Schemas\Courseware\Container::REL_BLOCKS);
}
protected function validateResourceDocument($json, $data)
{
if (!self::arrayHas($json, 'data')) {
return 'Missing `data` member at document´s top level.';
}
$data = self::arrayGet($json, 'data');
if (!is_array($data)) {
return 'Document´s ´data´ must be an array.';
}
foreach ($data as $item) {
if (self::arrayGet($item, 'type') !== \JsonApi\Schemas\Courseware\Block::TYPE) {
return 'Wrong `type` in document´s `data`.';
}
if (!self::arrayGet($item, 'id')) {
return 'Missing `id` of document´s `data`.';
}
}
if (self::arrayHas($json, 'data.attributes')) {
return 'Document must not have `attributes`.';
}
}
private function validateBlocks(\User $user, $json)
{
$blocks = [];
foreach (self::arrayGet($json, 'data') as $blockResource) {
if (!($block = Block::find($blockResource['id']))) {
throw new RecordNotFoundException();
}
if (!Authority::canShowBlock($user, $block)) {
throw new RecordNotFoundException();
}
$blocks[] = $block->id;
}
return $blocks;
}
private function replaceBlocks(Container $container, array $newIds)
{
$oldIds = $container->blocks->pluck('id');
$onlyInOld = array_diff($oldIds, $newIds);
$onlyInNew = array_diff($newIds, $oldIds);
// TODO: For now we are only interested in reordering the same blocks
if ($onlyInOld || $onlyInNew) {
throw new ConflictException();
}
$stmt = \DBManager::get()->prepare('UPDATE cw_blocks SET position = FIND_IN_SET(id, ?) - 1 WHERE container_id = ?');
$stmt->execute([join(',', $newIds), $container->id]);
}
}
|
