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<?php |
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namespace Fathomminds\Rest\Schema; |
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use Fathomminds\Rest\Schema\TypeValidators\ValidatorFactory; |
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use Fathomminds\Rest\Exceptions\RestException; |
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class SchemaValidator |
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{ |
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protected $fields = []; |
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protected $allowExtraneous = false; |
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public function validate($resource) |
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{ |
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$this->expectObject($resource); |
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$extraneousCheck = []; |
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if (!$this->allowExtraneous) { |
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$extraneousCheck = $this->validateExtraneousFields($resource); |
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} |
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$errors = array_merge( |
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$this->validateRequiredFields($resource), |
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$extraneousCheck, |
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$this->validateFieldTypes($resource) |
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); |
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if (!empty($errors)) { |
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throw new RestException( |
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'Invalid structure', |
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[ |
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'schema' => get_class($resource), |
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'errors' => $errors, |
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] |
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); |
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} |
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} |
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public function allowExtraneous($value) |
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{ |
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$this->allowExtraneous = $value; |
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} |
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private function expectObject($resource) |
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{ |
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if (gettype($resource) !== 'object') { |
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throw new RestException( |
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'Object expected', |
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[ |
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'schema' => static::class, |
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'type' => gettype($resource), |
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] |
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); |
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} |
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} |
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private function validateRequiredFields($resource) |
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{ |
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$errors = []; |
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$requiredFields = $this->getRequiredFields($resource); |
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foreach ($requiredFields as $fieldName) { |
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if (!property_exists($resource, $fieldName)) { |
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$errors[$fieldName] = 'Missing required field'; |
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} |
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} |
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return $errors; |
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} |
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private function validateExtraneousFields($resource) |
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{ |
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$errors = []; |
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foreach (array_keys(get_object_vars($resource)) as $fieldName) { |
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if (!isset($resource->schema()[$fieldName])) { |
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$errors[$fieldName] = 'Extraneous field'; |
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} |
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} |
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return $errors; |
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} |
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private function validateFieldTypes($resource) |
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{ |
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$validatorFactory = new ValidatorFactory; |
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$errors = []; |
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foreach ($resource->schema() as $fieldName => $rules) { |
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if (property_exists($resource, $fieldName)) { |
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try { |
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$validatorFactory->create($rules)->validate($resource->{$fieldName}); |
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} catch (RestException $ex) { |
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$errors[$fieldName]['error'] = $ex->getMessage(); |
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$errors[$fieldName]['details'] = $ex->getDetails(); |
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} |
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} |
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} |
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return $errors; |
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} |
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private function filterFields($resource, $paramKey, $paramValue) |
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{ |
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$fields = []; |
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foreach ($resource->schema() as $fieldName => $params) { |
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if (isset($params[$paramKey]) && $params[$paramKey] == $paramValue) { |
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$fields[] = $fieldName; |
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} |
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} |
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return $fields; |
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} |
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public function getFields($resource) |
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{ |
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return $resource->schema(); |
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} |
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public function getRequiredFields($resource) |
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{ |
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return $this->filterFields($resource, 'required', true); |
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} |
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public function getUniqueFields($resource) |
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{ |
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return $this->filterFields($resource, 'unique', true); |
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} |
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} |
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fathomminds /
php-rest-models
