Your Name
87 lines
3.1 KiB
PHP
87 lines
3.1 KiB
PHP
<?php
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namespace Nuwave\Lighthouse\Pagination;
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use GraphQL\Type\Definition\ResolveInfo;
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use Illuminate\Contracts\Pagination\LengthAwarePaginator;
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use Illuminate\Support\Collection;
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use Nuwave\Lighthouse\Support\Contracts\GraphQLContext;
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class ConnectionField
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{
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/**
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* Resolve page info for connection.
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*
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* @return array<string, mixed>
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*/
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public function pageInfoResolver(LengthAwarePaginator $paginator): array
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{
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/** @var int|null $firstItem Laravel type-hints are inaccurate here */
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$firstItem = $paginator->firstItem();
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/** @var int|null $lastItem Laravel type-hints are inaccurate here */
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$lastItem = $paginator->lastItem();
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return [
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'hasNextPage' => $paginator->hasMorePages(),
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'hasPreviousPage' => $paginator->currentPage() > 1,
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'startCursor' => $firstItem !== null
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? Cursor::encode($firstItem)
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: null,
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'endCursor' => $lastItem !== null
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? Cursor::encode($lastItem)
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: null,
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'total' => $paginator->total(),
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'count' => $paginator->count(),
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'currentPage' => $paginator->currentPage(),
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'lastPage' => $paginator->lastPage(),
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];
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}
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/**
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* Resolve edges for connection.
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*
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* @param \Illuminate\Pagination\LengthAwarePaginator<mixed> $paginator
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* @param array<string, mixed> $args
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*/
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public function edgeResolver(LengthAwarePaginator $paginator, array $args, GraphQLContext $context, ResolveInfo $resolveInfo): Collection
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{
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// We know those types because we manipulated them during PaginationManipulator
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/** @var \GraphQL\Type\Definition\NonNull $nonNullList */
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$nonNullList = $resolveInfo->returnType;
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/** @var \GraphQL\Type\Definition\ObjectType|\GraphQL\Type\Definition\InterfaceType $objectLikeType */
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$objectLikeType = $nonNullList->getWrappedType(true);
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$returnTypeFields = $objectLikeType->getFields();
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/** @var int|null $firstItem Laravel type-hints are inaccurate here */
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$firstItem = $paginator->firstItem();
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return $paginator
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->values()
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->map(function ($item, int $index) use ($returnTypeFields, $firstItem): array {
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$data = [];
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foreach ($returnTypeFields as $field) {
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switch ($field->name) {
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case 'cursor':
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$data['cursor'] = Cursor::encode((int) $firstItem + $index);
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break;
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case 'node':
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$data['node'] = $item;
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break;
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default:
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// All other fields on the return type are assumed to be part
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// of the edge, so we try to locate them in the pivot attribute
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if (isset($item->pivot->{$field->name})) {
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$data[$field->name] = $item->pivot->{$field->name};
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}
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}
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}
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return $data;
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});
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}
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}
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