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<?php |
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namespace Weew\Http; |
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use Weew\Http\Data\JsonData; |
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use Weew\Http\Data\UrlEncodedData; |
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use Weew\Http\Exceptions\InvalidDataClassException; |
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class ContentTypeDataMatcher implements IContentTypeDataMatcher { |
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/** |
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* @var array |
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*/ |
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protected $mappings = []; |
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/** |
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* ContentTypeDataMatcher constructor. |
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*/ |
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public function __construct() { |
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$this->registerDefaultMappings(); |
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} |
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/** |
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* @param IContentHolder $holder |
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* @param string $contentType |
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* |
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* @return IHttpData |
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*/ |
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public function createDataForContentType(IContentHolder $holder, $contentType) { |
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$parts = $this->parseContentType($contentType); |
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foreach ($parts as $part) { |
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$class = array_get($this->getMappings(), $part); |
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if ($class !== null) { |
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break; |
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} |
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} |
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if ($class === null) { |
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$class = $this->getDefaultDataClass(); |
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} |
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return new $class($holder); |
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} |
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/** |
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* @return array |
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*/ |
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public function getMappings() { |
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return $this->mappings; |
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} |
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/** |
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* @param array $mappings |
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* |
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* @throws InvalidDataClassException |
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*/ |
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public function setMappings(array $mappings) { |
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$this->mappings = []; |
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foreach ($mappings as $contentType => $dataClass) { |
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$this->addMapping($contentType, $dataClass); |
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} |
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} |
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/** |
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* @param string $contentType |
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* @param string $dataClass |
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* |
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* @throws InvalidDataClassException |
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*/ |
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public function addMapping($contentType, $dataClass) { |
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if ( ! class_exists($dataClass) |
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|| ! array_contains(class_implements($dataClass), IHttpData::class)) { |
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throw new InvalidDataClassException( |
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s('Class "%s" must implement the "%s" interface.', |
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$dataClass, IHttpData::class) |
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); |
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} |
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$this->mappings[$contentType] = $dataClass; |
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} |
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/** |
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* @param string $contentType |
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* |
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* @return array |
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*/ |
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protected function parseContentType($contentType) { |
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$parts = explode(';', $contentType); |
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foreach ($parts as $key => $value) { |
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$parts[$key] = trim($value); |
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} |
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return $parts; |
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} |
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/** |
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* @throws InvalidDataClassException |
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*/ |
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protected function registerDefaultMappings() { |
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$this->addMapping('application/json', JsonData::class); |
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} |
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/** |
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* @return string |
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*/ |
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protected function getDefaultDataClass() { |
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return UrlEncodedData::class; |
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} |
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} |
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weew /
http
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: