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<?php declare(strict_types=1); |
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/** |
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* ownCloud |
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* |
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* This file is licensed under the Affero General Public License version 3 or |
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* later. See the COPYING file. |
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* |
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* @author Pauli Järvinen <[email protected]> |
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* @copyright Pauli Järvinen 2021 |
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*/ |
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namespace OCA\Music\AppFramework\Utility; |
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use OCP\IRequest; |
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/** |
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* Reads and parses annotations from doc comments |
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*/ |
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class RequestParameterExtractor { |
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private $request; |
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private $customFilters; |
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public function __construct(IRequest $request, array $customFilters = []) { |
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$this->request = $request; |
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$this->customFilters = $customFilters; |
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} |
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/** |
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* @param object|string $object an object or classname |
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* @param string $method the method for which we want to extract parameters from the HTTP request |
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* @throws RequestParameterExtractorException if a required parameter is not found from the request |
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* @return array of mixed types (string, int, bool, null) |
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*/ |
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public function getParametersForMethod($object, string $method) : array { |
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$refMethod = new \ReflectionMethod($object, $method); |
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return \array_map([$this, 'getParameterValueFromRequest'], $refMethod->getParameters()); |
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} |
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/** |
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* @throws RequestParameterExtractorException |
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* @return string|int|bool|null |
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*/ |
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private function getParameterValueFromRequest(\ReflectionParameter $parameter) { |
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$paramName = $parameter->getName(); |
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$type = (string)$parameter->getType(); |
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if ($type === 'array') { |
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$parameterValue = $this->getRepeatedParam($paramName); |
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} else { |
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$parameterValue = $this->request->getParam($paramName); |
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} |
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if (\array_key_exists($paramName, $this->customFilters)) { |
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$parameterValue = $this->customFilters[$paramName]($parameterValue); |
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} |
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if ($parameterValue === null) { |
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if ($parameter->isOptional()) { |
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$parameterValue = $parameter->getDefaultValue(); |
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} elseif (!$parameter->allowsNull()) { |
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throw new RequestParameterExtractorException("Required parameter '$paramName' missing"); |
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} |
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} else { |
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// cast non-null values to requested type |
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if ($type === 'int' || $type === 'integer') { |
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$parameterValue = (int)$parameterValue; |
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} elseif ($type === 'bool' || $type === 'boolean') { |
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$parameterValue = \filter_var($parameterValue, FILTER_VALIDATE_BOOLEAN); |
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} |
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} |
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return $parameterValue; |
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} |
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/** |
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* Get values for parameter which may be present multiple times in the query string or POST data. |
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* @return string[] |
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*/ |
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private function getRepeatedParam(string $paramName) : array { |
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// We can't use the IRequest object nor $_GET and $_POST to get the data |
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// because all of these are based to the idea of unique parameter names. |
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// If the same name is repeated, only the last value is saved. Hence, we |
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// need to parse the raw data manually. |
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// query string is always present (although it could be empty) |
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$values = self::parseRepeatedKeyValues($paramName, $_SERVER['QUERY_STRING']); |
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// POST data is available if the method is POST |
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if ($this->request->getMethod() == 'POST') { |
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$values = \array_merge($values, |
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self::parseRepeatedKeyValues($paramName, \file_get_contents('php://input'))); |
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} |
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return $values; |
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} |
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/** |
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* Parse a string like "someKey=value1&someKey=value2&anotherKey=valueA&someKey=value3" |
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* and return an array of values for the given key |
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* @return string[] |
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*/ |
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private static function parseRepeatedKeyValues(string $key, string $data) : array { |
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$result = []; |
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$keyValuePairs = \explode('&', $data); |
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foreach ($keyValuePairs as $pair) { |
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$keyAndValue = \explode('=', $pair); |
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if ($keyAndValue[0] == $key) { |
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$result[] = $keyAndValue[1]; |
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} |
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} |
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return $result; |
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} |
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} |
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owncloud /
music
