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<?php declare(strict_types=1); |
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/** |
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* Spiral Framework. |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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namespace Cycle\ORM; |
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use Cycle\ORM\Exception\SchemaException; |
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/** |
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* Static schema with automatic class name => role aliasing. |
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*/ |
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final class Schema implements SchemaInterface |
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{ |
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/** @var array */ |
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private $aliases; |
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/** @var array */ |
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private $schema = []; |
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/** |
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* @param array $schema |
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*/ |
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public function __construct(array $schema) |
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{ |
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// split into two? |
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list($this->schema, $this->aliases) = $this->normalize($schema); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getRoles(): array |
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{ |
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return array_keys($this->schema); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getRelations(string $role): array |
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{ |
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return array_keys($this->define($role, self::RELATIONS)); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function defines(string $role): bool |
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{ |
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return array_key_exists($role, $this->schema) || array_key_exists($role, $this->aliases); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function define(string $role, int $property) |
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{ |
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$role = $this->resolveAlias($role); |
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if (!isset($this->schema[$role])) { |
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throw new SchemaException("Undefined schema `{$role}`, not found"); |
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} |
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if (!array_key_exists($property, $this->schema[$role])) { |
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return null; |
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} |
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return $this->schema[$role][$property]; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function defineRelation(string $role, string $relation): array |
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{ |
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$relations = $this->define($role, self::RELATIONS); |
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if (!isset($relations[$relation])) { |
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throw new SchemaException("Undefined relation `{$role}`.`{$relation}`"); |
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} |
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return $relations[$relation]; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function resolveAlias(string $entity): ?string |
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{ |
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// walk thought all children until parent entity found |
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while (isset($this->aliases[$entity])) { |
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$entity = $this->aliases[$entity]; |
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} |
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return $entity; |
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} |
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/** |
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* Automatically replace class names with their aliases. |
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* |
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* @param array $schema |
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* @return array Pair of [schema, aliases] |
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*/ |
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protected function normalize(array $schema): array |
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{ |
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$result = $aliases = []; |
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foreach ($schema as $key => $item) { |
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$role = $key; |
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if (!isset($item[self::ENTITY])) { |
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// legacy type of declaration (class => schema) |
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$item[self::ENTITY] = $key; |
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} |
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if (class_exists($key)) { |
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if (!isset($item[self::ROLE])) { |
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throw new SchemaException("Unable to create schema record without given role for `{$key}`"); |
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} |
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$role = $item[self::ROLE]; |
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} |
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if (class_exists($item[self::ENTITY])) { |
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$aliases[$item[self::ENTITY]] = $key; |
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} |
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unset($item[self::ROLE]); |
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$result[$role] = $item; |
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} |
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// normalizing relation associations |
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foreach ($result as &$item) { |
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if (isset($item[self::RELATIONS])) { |
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$item[self::RELATIONS] = iterator_to_array($this->normalizeRelations( |
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$item[self::RELATIONS], |
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$aliases |
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)); |
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} |
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unset($item); |
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} |
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return [$result, $aliases]; |
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} |
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/** |
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* @param array $an_array |
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* @return Schema |
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*/ |
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public static function __set_state($an_array): Schema |
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{ |
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$schema = new self([]); |
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$schema->schema = $an_array['schema']; |
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$schema->aliases = $an_array['aliases']; |
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return $schema; |
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} |
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/** |
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* @param array $relations |
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* @param array $aliases |
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* @return \Generator |
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*/ |
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private function normalizeRelations(array $relations, array $aliases): \Generator |
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{ |
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foreach ($relations as $name => &$rel) { |
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$target = $rel[Relation::TARGET]; |
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while (isset($aliases[$target])) { |
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$target = $aliases[$target]; |
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} |
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$rel[Relation::TARGET] = $target; |
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yield $name => $rel; |
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} |
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} |
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} |
cycle /
orm
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