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Deleted redundant complex relationmultimodel query class
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Dan Brown
parent
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commit
27942f5ce8
@ -1,308 +0,0 @@
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<?php namespace BookStack\Entities\Tools;
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use BookStack\Auth\Permissions\PermissionService;
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use BookStack\Entities\Models\Book;
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use BookStack\Entities\Models\Bookshelf;
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use BookStack\Entities\Models\Chapter;
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use BookStack\Entities\Models\Entity;
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use BookStack\Entities\Models\Page;
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use BookStack\Model;
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use Illuminate\Database\Query\Builder;
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use Illuminate\Database\Query\JoinClause;
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use Illuminate\Support\Collection;
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/**
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* Create a query for a polymorphic relation
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* that looks up all entity models in a single query
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* returning a collection or various hydrated models.
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*/
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class RelationMultiModelQuery
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{
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/** @var array<string, array> */
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protected $lookupModels = [];
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/** @var Model */
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protected $relation;
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/** @var string */
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protected $polymorphicFieldName;
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/**
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* The keys are relation fields to fetch.
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* The values are the name to use for the resulting model attribute.
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* @var array<string, string>
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*/
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protected $relationFields = [];
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/**
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* An array of [string $col, string $operator, mixed $value] where conditions.
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* @var array<array>>
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*/
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protected $relationWheres = [];
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/**
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* Field on the relation field to order by.
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* @var ?array[string $column, string $direction]
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*/
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protected $orderByRelationField = null;
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/**
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* Number of results to take
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* @var ?int
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*/
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protected $take = null;
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/**
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* Number of results to skip.
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* @var ?int
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*/
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protected $skip = null;
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/**
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* Callback that will receive the query for any advanced customization.
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* @var ?callable
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*/
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protected $queryCustomizer = null;
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/**
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* @throws \Exception
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*/
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public function __construct(string $relation, string $polymorphicFieldName)
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{
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$this->relation = (new $relation);
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if (!$this->relation instanceof Model) {
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throw new \Exception('Given relation must be a model instance class');
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}
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$this->polymorphicFieldName = $polymorphicFieldName;
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}
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/**
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* Set the query to look up the given entity type.
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*/
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public function forEntity(string $class, array $columns): self
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{
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$this->lookupModels[$class] = $columns;
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return $this;
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}
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/**
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* Set the query to look up all entity types.
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*/
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public function forAllEntities(): self
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{
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$this->lookupModels[Page::class] = ['id', 'name', 'slug', 'book_id', 'chapter_id', 'text'];
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$this->lookupModels[Chapter::class] = ['id', 'name', 'slug', 'book_id', 'description'];
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$this->lookupModels[Book::class] = ['id', 'name', 'slug', 'description', 'image_id'];
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$this->lookupModels[Bookshelf::class] = ['id', 'name', 'slug', 'description', 'image_id'];
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return $this;
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}
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/**
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* Bring back a field from the relation object with the model results.
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*/
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public function withRelationField(string $fieldName, string $modelAttributeName): self
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{
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$this->relationFields[$fieldName] = $modelAttributeName;
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return $this;
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}
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/**
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* Add a where condition to the query for the main relation table.
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*/
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public function whereRelation(string $column, string $operator, $value): self
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{
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$this->relationWheres[] = [$column, $operator, $value];
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return $this;
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}
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/**
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* Order by the given relation column.
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*/
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public function orderByRelation(string $column, string $direction = 'asc'): self
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{
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$this->orderByRelationField = [$column, $direction];
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return $this;
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}
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/**
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* Skip the given $count of results in the query.
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*/
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public function skip(?int $count): self
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{
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$this->skip = $count;
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return $this;
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}
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/**
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* Take the given $count of results in the query.
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*/
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public function take(?int $count): self
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{
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$this->take = $count;
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return $this;
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}
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/**
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* Pass a callable, which will receive the base query
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* to perform additional custom operations on the query.
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*/
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public function customizeUsing(callable $customizer): self
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{
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$this->queryCustomizer = $customizer;
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return $this;
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}
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/**
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* Get the SQL from the core query being ran.
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*/
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public function toSql(): string
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{
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return $this->build()->toSql();
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}
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/**
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* Run the query and get the results.
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*/
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public function run(): Collection
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{
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$results = $this->build()->get();
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return $this->hydrateModelsFromResults($results);
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}
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/**
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* Build the core query to run.
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*/
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protected function build(): Builder
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{
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$query = $this->relation->newQuery()->toBase();
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$relationTable = $this->relation->getTable();
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$modelTables = [];
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// Load relation fields
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foreach ($this->relationFields as $relationField => $alias) {
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$query->addSelect(
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$relationTable . '.' . $relationField . ' as '
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. $relationTable . '@' . $relationField
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);
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}
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// Load model selects & joins
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foreach ($this->lookupModels as $lookupModel => $columns) {
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/** @var Entity $model */
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$model = (new $lookupModel);
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$table = $model->getTable();
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$modelTables[] = $table;
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$query->addSelect($this->tableColumnsToSelectArray($table, $columns));
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$query->leftJoin($table, function (JoinClause $join) use ($table, $relationTable, $model) {
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$polyPrefix = $relationTable . '.' . $this->polymorphicFieldName;
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$join->on($polyPrefix . '_id', '=', $table . '.id');
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$join->where($polyPrefix . '_type', '=', $model->getMorphClass());
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$join->whereNull($table . '.deleted_at');
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});
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}
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// Where we have a model result
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$query->where(function (Builder $query) use ($modelTables) {
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foreach ($modelTables as $table) {
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$query->orWhereNotNull($table . '.id');
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}
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});
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// Add relation wheres
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foreach ($this->relationWheres as [$column, $operator, $value]) {
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$query->where($relationTable . '.' . $column, $operator, $value);
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}
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// Skip and take
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if (!is_null($this->skip)) {
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$query->skip($this->skip);
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}
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if (!is_null($this->take)) {
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$query->take($this->take);
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}
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if (!is_null($this->queryCustomizer)) {
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$customizer = $this->queryCustomizer;
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$customizer($query);
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}
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if (!is_null($this->orderByRelationField)) {
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$query->orderBy($relationTable . '.' . $this->orderByRelationField[0], $this->orderByRelationField[1]);
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}
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$this->applyPermissionsToQuery($query, 'view');
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return $query;
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}
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/**
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* Run the query through the permission system.
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*/
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protected function applyPermissionsToQuery(Builder $query, string $action)
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{
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$permissions = app()->make(PermissionService::class);
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$permissions->filterRestrictedEntityRelations(
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$query,
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$this->relation->getTable(),
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$this->polymorphicFieldName . '_id',
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$this->polymorphicFieldName . '_type',
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$action,
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);
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}
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/**
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* Create an array of select statements from the given table and column.
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*/
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protected function tableColumnsToSelectArray(string $table, array $columns): array
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{
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$selectArray = [];
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foreach ($columns as $column) {
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$selectArray[] = $table . '.' . $column . ' as ' . $table . '@' . $column;
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}
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return $selectArray;
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}
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/**
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* Hydrate a collection of result data into models.
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*/
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protected function hydrateModelsFromResults(Collection $results): Collection
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{
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$modelByIdColumn = [];
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foreach ($this->lookupModels as $lookupModel => $columns) {
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/** @var Model $model */
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$model = new $lookupModel;
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$modelByIdColumn[$model->getTable() . '@id'] = $model;
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}
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return $results->map(function ($result) use ($modelByIdColumn) {
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foreach ($modelByIdColumn as $idColumn => $modelInstance) {
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if (isset($result->$idColumn)) {
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return $this->hydrateModelFromResult($modelInstance, $result);
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}
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}
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return null;
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});
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}
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/**
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* Hydrate the given model type with the database result.
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*/
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protected function hydrateModelFromResult(Model $model, \stdClass $result): Model
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{
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$modelPrefix = $model->getTable() . '@';
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$relationPrefix = $this->relation->getTable() . '@';
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$attrs = [];
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foreach ((array) $result as $col => $value) {
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if (strpos($col, $modelPrefix) === 0) {
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$attrName = substr($col, strlen($modelPrefix));
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$attrs[$attrName] = $value;
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}
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if (strpos($col, $relationPrefix) === 0) {
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$col = substr($col, strlen($relationPrefix));
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$attrName = $this->relationFields[$col];
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$attrs[$attrName] = $value;
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}
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}
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return $model->newInstance()->forceFill($attrs);
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}
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}
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