90 lines
2.5 KiB
PHP
90 lines
2.5 KiB
PHP
<?php
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namespace BookStack\Entities\Tools;
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use BookStack\App\Model;
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use BookStack\Entities\Queries\EntityQueries;
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use Illuminate\Database\Eloquent\Relations\Relation;
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class MixedEntityListLoader
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{
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public function __construct(
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protected EntityQueries $queries,
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) {
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}
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/**
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* Efficiently load in entities for listing onto the given list
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* where entities are set as a relation via the given name.
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* This will look for a model id and type via 'name_id' and 'name_type'.
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* @param Model[] $relations
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*/
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public function loadIntoRelations(array $relations, string $relationName, bool $loadParents): void
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{
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$idsByType = [];
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foreach ($relations as $relation) {
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$type = $relation->getAttribute($relationName . '_type');
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$id = $relation->getAttribute($relationName . '_id');
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if (!isset($idsByType[$type])) {
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$idsByType[$type] = [];
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}
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$idsByType[$type][] = $id;
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}
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$modelMap = $this->idsByTypeToModelMap($idsByType, $loadParents);
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foreach ($relations as $relation) {
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$type = $relation->getAttribute($relationName . '_type');
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$id = $relation->getAttribute($relationName . '_id');
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$related = $modelMap[$type][strval($id)] ?? null;
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if ($related) {
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$relation->setRelation($relationName, $related);
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}
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}
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}
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/**
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* @param array<string, int[]> $idsByType
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* @return array<string, array<int, Model>>
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*/
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protected function idsByTypeToModelMap(array $idsByType, bool $eagerLoadParents): array
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{
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$modelMap = [];
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foreach ($idsByType as $type => $ids) {
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$models = $this->queries->visibleForList($type)
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->whereIn('id', $ids)
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->with($eagerLoadParents ? $this->getRelationsToEagerLoad($type) : [])
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->get();
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if (count($models) > 0) {
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$modelMap[$type] = [];
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}
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foreach ($models as $model) {
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$modelMap[$type][strval($model->id)] = $model;
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}
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}
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return $modelMap;
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}
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protected function getRelationsToEagerLoad(string $type): array
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{
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$toLoad = [];
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$loadVisible = fn (Relation $query) => $query->scopes('visible');
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if ($type === 'chapter' || $type === 'page') {
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$toLoad['book'] = $loadVisible;
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}
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if ($type === 'page') {
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$toLoad['chapter'] = $loadVisible;
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}
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return $toLoad;
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}
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}
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