ServerRequest::getAttributes() - Code Metrics - Inspection of "Added basic implementation for withParsedBody" - patoui/router - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Push — master ( fbfdc3...9136ba )

by Patrique
created 2019-12-04 13:31 UTC
ServerRequest::getAttributes() A

↳ Parent: ServerRequest
Complexity

Conditions	1
Paths	1
Size

Total Lines
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
dl	0
loc	4
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	0
<?php

declare(strict_types=1);

namespace Patoui\Router;

use InvalidArgumentException;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\StreamInterface;
use Psr\Http\Message\UploadedFileInterface;
use Psr\Http\Message\UriInterface;

class ServerRequest implements ServerRequestInterface
{
    /**
     * @var string Represent the HTTP version number (e.g., "1.1", "1.0")
     */
    private $version;

    /**
     * @var array Contains header by key and array.
     * e.g. ['content-type' => ['application/json']]
     */
    private $headers;

    /** @var StreamInterface */
    private $body;

    /** @var string */
    private $requestTarget;

    /** @var string */
    private $method;

    /** @var UriInterface */
    private $uri;

    /** @var array */
    private $serverParams;

    /** @var array */
    private $cookieParams;

    /** @var array */
    private $queryParams;

    /** @var array */
    private $uploadedFiles;

    /** @var null|array|object */
    private $parsedBody;

    public function __construct(
        string $version,
        array $headers,
        StreamInterface $body,
        string $requestTarget,
        string $method,
        UriInterface $uri,
        array $serverParams,
        array $cookieParams,
        array $queryParams,
        array $uploadedFiles
    ) {
        $this->validateProtocolVersion($version);
        $this->validateHeaders($headers);
        $this->validateMethod($method);

        $this->version = $version;
        $this->headers = $headers;
        $this->body = $body;
        $this->requestTarget = $requestTarget;
        $this->method = $method;
        $this->uri = $uri;
        $this->serverParams = $serverParams;
        $this->cookieParams = $cookieParams;
        $this->queryParams = $queryParams;
        $this->uploadedFiles = $uploadedFiles;
    }

    /**
     * Retrieves the HTTP protocol version as a string.
     *
     * The string MUST contain only the HTTP version number (e.g., "1.1", "1.0").
     *
     * @return string HTTP protocol version.
     */
    public function getProtocolVersion()
    {
        return $this->version;
    }

    /**
     * Return an instance with the specified HTTP protocol version.
     *
     * The version string MUST contain only the HTTP version number (e.g.,
     * "1.1", "1.0").
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * new protocol version.
     *
     * @param  string  $version  HTTP protocol version
     * @return static
     */
    public function withProtocolVersion($version) : self
    {
        $this->validateProtocolVersion($version);

        $instance = clone $this;
        $instance->version = $version;

        return $instance;
    }

    /**
     * Verifies the protocol version.
     *
     * @throws InvalidArgumentException
     * @param  string  $version The version string MUST contain only the HTTP
     * version number (e.g., "1.1", "1.0").
     */
    private function validateProtocolVersion(string $version) : void
    {
        if (! in_array($version, ['1.1', '2.0'])) {
            throw new InvalidArgumentException("Invalid HTTP version: {$version}");
        }
    }

    /**
     * Retrieves all message header values.
     *
     * The keys represent the header name as it will be sent over the wire, and
     * each value is an array of strings associated with the header.
     *
     *     // Represent the headers as a string
     *     foreach ($message->getHeaders() as $name => $values) {
     *         echo $name . ": " . implode(", ", $values);
     *     }
     *
     *     // Emit headers iteratively:
     *     foreach ($message->getHeaders() as $name => $values) {
     *         foreach ($values as $value) {
     *             header(sprintf('%s: %s', $name, $value), false);
     *         }
     *     }
     *
     * While header names are not case-sensitive, getHeaders() will preserve the
     * exact case in which headers were originally specified.
     *
     * @return string[][] Returns an associative array of the message's headers. Each
     *     key MUST be a header name, and each value MUST be an array of strings
     *     for that header.
     */
    public function getHeaders()
    {
        return $this->headers;
    }

    /**
     * Checks if a header exists by the given case-insensitive name.
     *
     * @param  string  $name  Case-insensitive header field name.
     * @return bool Returns true if any header names match the given header
     *     name using a case-insensitive string comparison. Returns false if
     *     no matching header name is found in the message.
     */
    public function hasHeader($name)
    {
        return array_key_exists(
            mb_strtoupper($name),
            array_change_key_case($this->headers, CASE_UPPER)
        );
    }

    /**
     * Retrieves a message header value by the given case-insensitive name.
     *
     * This method returns an array of all the header values of the given
     * case-insensitive header name.
     *
     * If the header does not appear in the message, this method MUST return an
     * empty array.
     *
     * @param  string  $name  Case-insensitive header field name.
     * @return string[] An array of string values as provided for the given
     *    header. If the header does not appear in the message, this method MUST
     *    return an empty array.
     */
    public function getHeader($name)
    {
        $name = mb_strtoupper($name);
        $headers = array_change_key_case($this->headers, CASE_UPPER);

        if (array_key_exists($name, $headers) === false) {
            return [];
        }

        return $headers[$name];
    }

    /**
     * Retrieves a comma-separated string of the values for a single header.
     *
     * This method returns all of the header values of the given
     * case-insensitive header name as a string concatenated together using
     * a comma.
     *
     * NOTE: Not all header values may be appropriately represented using
     * comma concatenation. For such headers, use getHeader() instead
     * and supply your own delimiter when concatenating.
     *
     * If the header does not appear in the message, this method MUST return
     * an empty string.
     *
     * @param  string  $name  Case-insensitive header field name.
     * @return string A string of values as provided for the given header
     *    concatenated together using a comma. If the header does not appear in
     *    the message, this method MUST return an empty string.
     */
    public function getHeaderLine($name)
    {
        return implode(',', $this->getHeader($name));
    }

    /**
     * Return an instance with the provided value replacing the specified header.
     *
     * While header names are case-insensitive, the casing of the header will
     * be preserved by this function, and returned from getHeaders().
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * new and/or updated header and value.
     *
     * @param  string  $name  Case-insensitive header field name.
     * @param  string|string[]  $value  Header value(s).
     * @return static
     * @throws \InvalidArgumentException for invalid header names or values.
     */
    public function withHeader($name, $value)
    {
        $newHeaders = array_merge($this->getHeaders(), [$name => [$value]]);

        $instance = clone $this;
        $instance->headers = $newHeaders;

        return $instance;
    }

    /**
     * Return an instance with the specified header appended with the given value.
     *
     * Existing values for the specified header will be maintained. The new
     * value(s) will be appended to the existing list. If the header did not
     * exist previously, it will be added.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * new header and/or value.
     *
     * @param  string  $name  Case-insensitive header field name to add.
     * @param  string|string[]  $value  Header value(s).
     * @return static
     * @throws \InvalidArgumentException for invalid header names or values.
     */
    public function withAddedHeader($name, $value)
    {
        $newHeaders = $this->getHeaders();
        $headerToUpdate = $this->getHeader($name);
        $headerToUpdate[] = $value;
        $newHeaders[$name] = $headerToUpdate;

        $instance = clone $this;
        $instance->headers = $newHeaders;

        return $instance;
    }

    /**
     * Return an instance without the specified header.
     *
     * Header resolution MUST be done without case-sensitivity.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that removes
     * the named header.
     *
     * @param  string  $name  Case-insensitive header field name to remove.
     * @return static
     */
    public function withoutHeader($name)
    {
        $newHeaders = $this->getHeaders();
        unset($newHeaders[$name]);

        $instance = clone $this;
        $instance->headers = $newHeaders;

        return $instance;
    }

    /**
     * Verifies the headers are valid.
     *
     * @throws InvalidArgumentException
     * @param  array  $headers Headers for the incoming request
     */
    private function validateHeaders(array $headers) : void
    {
        $exceptionMessage = 'Invalid headers: '.json_encode($headers);

        if (empty($headers)) {
            return;
        }

        $headersWithArraysOnly = array_filter($headers, function ($header) {
            return is_array($header);
        });

        if (count($headers) !== count($headersWithArraysOnly)) {
            throw new InvalidArgumentException($exceptionMessage);
        }

        foreach ($headers as $key => $header) {
            $headerWithStringValuesOnly = array_filter($header, function ($headerValue) {
                return is_string($headerValue);
            });

            if (count($header) !== count($headerWithStringValuesOnly)) {
                throw new InvalidArgumentException($exceptionMessage);
            }
        }
    }

    /**
     * Gets the body of the message.
     *
     * @return StreamInterface Returns the body as a stream.
     */
    public function getBody()
    {
        return $this->body;
    }

    /**
     * Return an instance with the specified message body.
     *
     * The body MUST be a StreamInterface object.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return a new instance that has the
     * new body stream.
     *
     * @param  StreamInterface  $body  Body.
     * @return static
     * @throws \InvalidArgumentException When the body is not valid.
     */
    public function withBody(StreamInterface $body)
    {
        $instance = clone $this;
        $instance->body = $body;

        return $instance;
    }

    /**
     * Retrieves the message's request target.
     *
     * Retrieves the message's request-target either as it will appear (for
     * clients), as it appeared at request (for servers), or as it was
     * specified for the instance (see withRequestTarget()).
     *
     * In most cases, this will be the origin-form of the composed URI,
     * unless a value was provided to the concrete implementation (see
     * withRequestTarget() below).
     *
     * If no URI is available, and no request-target has been specifically
     * provided, this method MUST return the string "/".
     *
     * @return string
     */
    public function getRequestTarget()
    {
        return $this->requestTarget;
    }

    /**
     * Return an instance with the specific request-target.
     *
     * If the request needs a non-origin-form request-target — e.g., for
     * specifying an absolute-form, authority-form, or asterisk-form —
     * this method may be used to create an instance with the specified
     * request-target, verbatim.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * changed request target.
     *
     * @link http://tools.ietf.org/html/rfc7230#section-5.3 (for the various
     *     request-target forms allowed in request messages)
     * @param  mixed  $requestTarget
     * @return static
     */
    public function withRequestTarget($requestTarget)
    {
        $instance = clone $this;
        $instance->requestTarget = (string) $requestTarget;

        return $instance;
    }

    /**
     * Verifies the HTTP method is valid.
     *
     * @throws InvalidArgumentException
     * @param  string  $method HTTP method for the incoming request
     */
    private function validateMethod(string $method) : void
    {
        if (! in_array(strtoupper($method), ['POST', 'GET', 'OPTIONS'])) {
            throw new InvalidArgumentException("Invalid HTTP method: {$method}");
        }
    }

    /**
     * Retrieves the HTTP method of the request.
     *
     * @return string Returns the request method.
     */
    public function getMethod()
    {
        return $this->method;
    }

    /**
     * Return an instance with the provided HTTP method.
     *
     * While HTTP method names are typically all uppercase characters, HTTP
     * method names are case-sensitive and thus implementations SHOULD NOT
     * modify the given string.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * changed request method.
     *
     * @param  string  $method  Case-sensitive method.
     * @return static
     * @throws \InvalidArgumentException for invalid HTTP methods.
     */
    public function withMethod($method)
    {
        $this->validateMethod($method);

        $instance = clone $this;
        $instance->method = $method;

        return $instance;
    }

    /**
     * Retrieves the URI instance.
     *
     * This method MUST return a UriInterface instance.
     *
     * @link http://tools.ietf.org/html/rfc3986#section-4.3
     * @return UriInterface Returns a UriInterface instance
     *     representing the URI of the request.
     */
    public function getUri()
    {
        return $this->uri;
    }

    /**
     * Returns an instance with the provided URI.
     *
     * This method MUST update the Host header of the returned request by
     * default if the URI contains a host component. If the URI does not
     * contain a host component, any pre-existing Host header MUST be carried
     * over to the returned request.
     *
     * You can opt-in to preserving the original state of the Host header by
     * setting `$preserveHost` to `true`. When `$preserveHost` is set to
     * `true`, this method interacts with the Host header in the following ways:
     *
     * - If the Host header is missing or empty, and the new URI contains
     *   a host component, this method MUST update the Host header in the returned
     *   request.
     * - If the Host header is missing or empty, and the new URI does not contain a
     *   host component, this method MUST NOT update the Host header in the returned
     *   request.
     * - If a Host header is present and non-empty, this method MUST NOT update
     *   the Host header in the returned request.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * new UriInterface instance.
     *
     * @link http://tools.ietf.org/html/rfc3986#section-4.3
     * @param  UriInterface  $uri  New request URI to use.
     * @param  bool  $preserveHost  Preserve the original state of the Host header.
     * @return static
     */
    public function withUri(UriInterface $uri, $preserveHost = false)
    {
        $headers = $this->getHeaders();
        $currentUriHost = $this->uri->getHost();

        if ($preserveHost && $currentUriHost) {
            $headers['HTTP_HOST'] = [$currentUriHost];
        }

        $instance = clone $this;
        $instance->headers = $headers;
        $instance->uri = $uri;

        return $instance;
    }

    /**
     * Retrieve server parameters.
     *
     * Retrieves data related to the incoming request environment,
     * typically derived from PHP's $_SERVER superglobal. The data IS NOT
     * REQUIRED to originate from $_SERVER.
     *
     * @return array
     */
    public function getServerParams()
    {
        return $this->serverParams;
    }

    /**
     * Retrieve cookies.
     *
     * Retrieves cookies sent by the client to the server.
     *
     * The data MUST be compatible with the structure of the $_COOKIE
     * superglobal.
     *
     * @return array
     */
    public function getCookieParams()
    {
        return $this->cookieParams;
    }

    /**
     * Return an instance with the specified cookies.
     *
     * The data IS NOT REQUIRED to come from the $_COOKIE superglobal, but MUST
     * be compatible with the structure of $_COOKIE. Typically, this data will
     * be injected at instantiation.
     *
     * This method MUST NOT update the related Cookie header of the request
     * instance, nor related values in the server params.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * updated cookie values.
     *
     * @param  array  $cookies  Array of key/value pairs representing cookies.
     * @return static
     */
    public function withCookieParams(array $cookies)
    {
        $instance = clone $this;
        $instance->cookieParams = $cookies;

        return $instance;
    }

    /**
     * Retrieve query string arguments.
     *
     * Retrieves the deserialized query string arguments, if any.
     *
     * Note: the query params might not be in sync with the URI or server
     * params. If you need to ensure you are only getting the original
     * values, you may need to parse the query string from `getUri()->getQuery()`
     * or from the `QUERY_STRING` server param.
     *
     * @return array
     */
    public function getQueryParams()
    {
        return $this->queryParams;
    }

    /**
     * Return an instance with the specified query string arguments.
     *
     * These values SHOULD remain immutable over the course of the incoming
     * request. They MAY be injected during instantiation, such as from PHP's
     * $_GET superglobal, or MAY be derived from some other value such as the
     * URI. In cases where the arguments are parsed from the URI, the data
     * MUST be compatible with what PHP's parse_str() would return for
     * purposes of how duplicate query parameters are handled, and how nested
     * sets are handled.
     *
     * Setting query string arguments MUST NOT change the URI stored by the
     * request, nor the values in the server params.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * updated query string arguments.
     *
     * @param  array  $query  Array of query string arguments, typically from
     *     $_GET.
     * @return static
     */
    public function withQueryParams(array $query)
    {
        $instance = clone $this;
        $instance->queryParams = array_merge($this->getQueryParams(), $query);

        return $instance;
    }

    /**
     * Retrieve normalized file upload data.
     *
     * This method returns upload metadata in a normalized tree, with each leaf
     * an instance of Psr\Http\Message\UploadedFileInterface.
     *
     * These values MAY be prepared from $_FILES or the message body during
     * instantiation, or MAY be injected via withUploadedFiles().
     *
     * @return array An array tree of UploadedFileInterface instances; an empty
     *     array MUST be returned if no data is present.
     */
    public function getUploadedFiles()
    {
        return $this->uploadedFiles;
    }

    /**
     * Create a new instance with the specified uploaded files.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * updated body parameters.
     *
     * @param  array  $uploadedFiles  An array tree of UploadedFileInterface instances.
     * @return static
     * @throws \InvalidArgumentException if an invalid structure is provided.
     */
    public function withUploadedFiles(array $uploadedFiles)
    {
        $filteredUploadedFiles = array_filter($uploadedFiles, function ($uploadedFile) {
            return $uploadedFile instanceof UploadedFileInterface;
        });

        if (count($filteredUploadedFiles) !== count($uploadedFiles)) {
            throw new InvalidArgumentException(
                'Must be an array with instances of '
                .UploadedFileInterface::class
            );
        }

        $instance = clone $this;
        $instance->uploadedFiles = $uploadedFiles;

        return $instance;
    }

    /**
     * Retrieve any parameters provided in the request body.
     *
     * If the request Content-Type is either application/x-www-form-urlencoded
     * or multipart/form-data, and the request method is POST, this method MUST
     * return the contents of $_POST.
     *
     * Otherwise, this method may return any results of deserializing
     * the request body content; as parsing returns structured content, the
     * potential types MUST be arrays or objects only. A null value indicates
     * the absence of body content.
     *
     * @return null|array|object The deserialized body parameters, if any.
     *     These will typically be an array or object.
     */
    public function getParsedBody()
    {
        $isPost = $this->isPostRequest();

        if ($isPost) {
            return $_POST;
        }

        return $this->parsedBody;
    }

    /**
     * Return an instance with the specified body parameters.
     *
     * These MAY be injected during instantiation.
     *
     * If the request Content-Type is either application/x-www-form-urlencoded
     * or multipart/form-data, and the request method is POST, use this method
     * ONLY to inject the contents of $_POST.
     *
     * The data IS NOT REQUIRED to come from $_POST, but MUST be the results of
     * deserializing the request body content. Deserialization/parsing returns
     * structured data, and, as such, this method ONLY accepts arrays or objects,
     * or a null value if nothing was available to parse.
     *
     * As an example, if content negotiation determines that the request data
     * is a JSON payload, this method could be used to create a request
     * instance with the deserialized parameters.
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * updated body parameters.
     *
     * @param  null|array|object  $data  The deserialized body data. This will
     *     typically be in an array or object.
     * @return static
     * @throws \InvalidArgumentException if an unsupported argument type is
     *     provided.
     */
    public function withParsedBody($data)
    {
        if (is_null($data)) {
            $data = [];
        }

        if (is_object($data)) {
            $data = (array) $data;
        }

        if (! is_array($data)) {
            throw new InvalidArgumentException(
                'Parsed body must be of type: null, array, or object'
            );
        }

        $isPost = $this->isPostRequest();
        $instance = clone $this;
        $instance->parsedBody = array_merge($this->getParsedBody(), $data);

        if ($isPost) {
            // TODO: identify potential risk with assigning values to the super global variable
            foreach ($data as $key => $value) {
                $_POST[$key] = $value;
            }
        }

        return $instance;
    }

    /**
     * Retrieve attributes derived from the request.
     *
     * The request "attributes" may be used to allow injection of any
     * parameters derived from the request: e.g., the results of path
     * match operations; the results of decrypting cookies; the results of
     * deserializing non-form-encoded message bodies; etc. Attributes
     * will be application and request specific, and CAN be mutable.
     *
     * @return array Attributes derived from the request.
     */
    public function getAttributes()
    {
        // TODO: Implement getAttributes() method.
    }

    /**
     * Retrieve a single derived request attribute.
     *
     * Retrieves a single derived request attribute as described in
     * getAttributes(). If the attribute has not been previously set, returns
     * the default value as provided.
     *
     * This method obviates the need for a hasAttribute() method, as it allows
     * specifying a default value to return if the attribute is not found.
     *
     * @param  string  $name  The attribute name.
     * @param  mixed  $default  Default value to return if the attribute does not exist.
     * @return mixed
     * @see getAttributes()
     */
    public function getAttribute($name, $default = null)
    {
        // TODO: Implement getAttribute() method.
    }

    /**
     * Return an instance with the specified derived request attribute.
     *
     * This method allows setting a single derived request attribute as
     * described in getAttributes().
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that has the
     * updated attribute.
     *
     * @param  string  $name  The attribute name.
     * @param  mixed  $value  The value of the attribute.
     * @return static
     * @see getAttributes()
     */
    public function withAttribute($name, $value)
    {
        // TODO: Implement withAttribute() method.
    }

    /**
     * Return an instance that removes the specified derived request attribute.
     *
     * This method allows removing a single derived request attribute as
     * described in getAttributes().
     *
     * This method MUST be implemented in such a way as to retain the
     * immutability of the message, and MUST return an instance that removes
     * the attribute.
     *
     * @param  string  $name  The attribute name.
     * @return static
     * @see getAttributes()
     */
    public function withoutAttribute($name)
    {
        // TODO: Implement withoutAttribute() method.
    }

    /**
     * Determines if the request is a POST request based on content type headers
     * @return bool
     */
    private function isPostRequest() : bool
    {
        foreach ($this->getHeader('content-type') as $contentType) {
            if ($contentType === 'application/x-www-form-urlencoded' ||
                $contentType === 'multipart/form-data') {
                return true;
            }
        }

        return false;
    }
}

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ServerRequest::getAttributes() A

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