Validation::__invoke() - Code Metrics - Inspection of "Fix the validation of an array of objects" - DavidePastore/Slim-Validation - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#40)

by Davide

created 2019-01-03 15:01 UTC

Validation::__invoke() A

↳ Parent: Validation

Complexity

Conditions	2
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	12
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	18
ccs	12
cts	12
cp	1
rs	9.6666
c	0
b	0
f	0
cc	2
nc	2
nop	3
crap	2

<?php

namespace DavidePastore\Slim\Validation;

use Respect\Validation\Exceptions\NestedValidationException;
use Respect\Validation\Validator;

/**
 * Validation for Slim.
 */
class Validation
{
    /**
     * Validators.
     *
     * @var array
     */
    protected $validators = [];

    /**
     * Options.
     *
     * @var array
     */
    protected $options = [
    ];

    /**
     * The translator to use fro the exception message.
     *
     * @var callable
     */
    protected $translator = null;

    /**
     * Errors from the validation.
     *
     * @var array
     */
    protected $errors = [];

    /**
     * The 'errors' attribute name.
     *
     * @var string
     */
    protected $errors_name = 'errors';

    /**
     * The 'has_error' attribute name.
     *
     * @var string
     */
    protected $has_errors_name = 'has_errors';

    /**
     * The 'validators' attribute name.
     *
     * @var string
     */
    protected $validators_name = 'validators';

    /**
     * The 'translator' attribute name.
     *
     * @var string
     */
    protected $translator_name = 'translator';

    /**
     * Is the validators an instance of Validator?
     *
     * @var boolean
     */
    protected $isValidator = false;

    /**
     * Create new Validator service provider.
     *
     * @param null|array|ArrayAccess $validators
     * @param null|callable          $translator
     * @param []|array               $options

     */
    public function __construct($validators = null, $translator = null, $options = [])
    {
        // Set the validators
        if (is_array($validators) || $validators instanceof \ArrayAccess) {
            $this->validators = $validators;
        } elseif ($validators instanceof Validator) {
            $this->validators = $validators;
            $this->isValidator = true;
        } elseif (is_null($validators)) {
            $this->validators = [];
        }
        $this->translator = $translator;
        $this->options = array_merge($this->options, $options);
    }

    /**
     * Validation middleware invokable class.
     *
     * @param \Psr\Http\Message\ServerRequestInterface $request  PSR7 request
     * @param \Psr\Http\Message\ResponseInterface      $response PSR7 response
     * @param callable                                 $next     Next middleware
     *
     * @return \Psr\Http\Message\ResponseInterface
     */
    public function __invoke($request, $response, $next)
    {
        $this->errors = [];
        $params = $request->getParams();
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
        $params = array_merge((array) $request->getAttribute('routeInfo')[2], $params);
        if ($this->isValidator) {
            $this->validateParam($params, $this->validators);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
        } else {
            $this->validate($params, $this->validators);
        }

        $request = $request->withAttribute($this->errors_name, $this->getErrors());
        $request = $request->withAttribute($this->has_errors_name, $this->hasErrors());
        $request = $request->withAttribute($this->validators_name, $this->getValidators());
        $request = $request->withAttribute($this->translator_name, $this->getTranslator());

        return $next($request, $response);
    }

    /**
     * Validate the parameters by the given params, validators and actual keys.
     * This method populates the $errors attribute.
     *
     * @param array $params     The array of parameters.
     * @param array $validators The array of validators.
     * @param array $actualKeys An array that will save all the keys of the tree to retrieve the correct value.
     */
    private function validate($params = [], $validators = [], $actualKeys = [])
    {
        //Validate every parameters in the validators array
        foreach ($validators as $key => $validator) {
            $actualKeys[] = $key;
            $param = $this->getNestedParam($params, $actualKeys);
            if (is_array($validator)) {
                $this->validate($params, $validator, $actualKeys);
            } else {
                $this->validateParam($param, $validator, $actualKeys);
            }

            //Remove the key added in this foreach
            array_pop($actualKeys);
        }
    }

    /**
     * Validate a param.
     * @param any $param The parameter to validate.
     * @param any $validator The validator to use to validate the given parameter.
     * @param array $actualKeys An array with the position of the parameter.
     */
    private function validateParam($param, $validator, $actualKeys = [])
    {
        try {
            $validator->assert($param);
        } catch (NestedValidationException $exception) {
            if ($this->translator) {
                $exception->setParam('translator', $this->translator);
            }

            $messages = $exception->getMessages();
            if (empty($actualKeys)) {
                $this->errors = $messages;
            } else {
                $this->errors[implode('.', $actualKeys)] = $messages;
            }
        }
    }

    /**
     * Get the nested parameter value.
     *
     * @param array $params An array that represents the values of the parameters.
     * @param array $keys   An array that represents the tree of keys to use.
     *
     * @return mixed The nested parameter value by the given params and tree of keys.
     */
    private function getNestedParam($params = [], $keys = [])
    {
        if (empty($keys)) {
            return $params;
        } else {
            $firstKey = array_shift($keys);
            if ($this->isArrayLike($params) && array_key_exists($firstKey, $params)) {
                $params = (array) $params;
                $paramValue = $params[$firstKey];

                return $this->getNestedParam($paramValue, $keys);
            } else {
                return;
            }
        }
    }

    /**
     * Check if the given $params is an array like variable.
     *
     * @param array $params The variable to check.
     *
     * @return boolean Returns true if the given $params parameter is array like.
     */
    private function isArrayLike($params)
    {
        return is_array($params) || $params instanceof \SimpleXMLElement;
    }

    /**
     * Check if there are any errors.
     *
     * @return bool
     */
    public function hasErrors()
    {
        return !empty($this->errors);
    }

    /**
     * Get errors.
     *
     * @return array The errors array.
     */
    public function getErrors()
    {
        return $this->errors;
    }

    /**
     * Get validators.
     *
     * @return array The validators array.
     */
    public function getValidators()
    {
        return $this->validators;
    }

    /**
     * Set validators.
     *
     * @param array $validators The validators array.
     */
    public function setValidators($validators)
    {
        $this->validators = $validators;
    }

    /**
     * Get translator.
     *
     * @return callable The translator.
     */
    public function getTranslator()
    {
        return $this->translator;
    }

    /**
     * Set translator.
     *
     * @param callable $translator The translator.
     */
    public function setTranslator($translator)
    {
        $this->translator = $translator;
    }
}


1		<?php
2
3		namespace DavidePastore\Slim\Validation;
4
5		use Respect\Validation\Exceptions\NestedValidationException;
6		use Respect\Validation\Validator;
7
8		/**
9		* Validation for Slim.
10		*/
11		class Validation
12		{
13		/**
14		* Validators.
15		*
16		* @var array
17		*/
18		protected $validators = [];
19
20		/**
21		* Options.
22		*
23		* @var array
24		*/
25		protected $options = [
26		];
27
28		/**
29		* The translator to use fro the exception message.
30		*
31		* @var callable
32		*/
33		protected $translator = null;
34
35		/**
36		* Errors from the validation.
37		*
38		* @var array
39		*/
40		protected $errors = [];
41
42		/**
43		* The 'errors' attribute name.
44		*
45		* @var string
46		*/
47		protected $errors_name = 'errors';
48
49		/**
50		* The 'has_error' attribute name.
51		*
52		* @var string
53		*/
54		protected $has_errors_name = 'has_errors';
55
56		/**
57		* The 'validators' attribute name.
58		*
59		* @var string
60		*/
61		protected $validators_name = 'validators';
62
63		/**
64		* The 'translator' attribute name.
65		*
66		* @var string
67		*/
68		protected $translator_name = 'translator';
69
70		/**
71		* Is the validators an instance of Validator?
72		*
73		* @var boolean
74		*/
75		protected $isValidator = false;
76
77		/**
78		* Create new Validator service provider.
79		*
80		* @param null\|array\|ArrayAccess $validators
81		* @param null\|callable $translator
82		* @param []\|array $options
		0 ignored issues – show Documentation introduced 2017-03-10 16:54 UTC by Report Bug Copy Issue Report The doc-type `[]\|array` could not be parsed: Unknown type name "" at position 0. [(view supported doc-types) This check marks PHPDoc comments that could not be parsed by our parser. To see which comment annotations we can parse, please refer to our documentation on supported doc-types. Loading history...
83		*/
84	31	public function __construct($validators = null, $translator = null, $options = [])
85		{
86		// Set the validators
87	31	if (is_array($validators) \|\| $validators instanceof \ArrayAccess) {
88	24	$this->validators = $validators;
89	7	} elseif ($validators instanceof Validator) {
90	5	$this->validators = $validators;
91	5	$this->isValidator = true;
92	2	} elseif (is_null($validators)) {
93	1	$this->validators = [];
94		}
95	31	$this->translator = $translator;
96	31	$this->options = array_merge($this->options, $options);
97	31	}
98
99		/**
100		* Validation middleware invokable class.
101		*
102		* @param \Psr\Http\Message\ServerRequestInterface $request PSR7 request
103		* @param \Psr\Http\Message\ResponseInterface $response PSR7 response
104		* @param callable $next Next middleware
105		*
106		* @return \Psr\Http\Message\ResponseInterface
107		*/
108	31	public function __invoke($request, $response, $next)
109		{
110	31	$this->errors = [];
111	31	$params = $request->getParams();
		0 ignored issues – show Bug introduced 2018-08-24 11:24 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Psr\Http\Message\ServerRequestInterface` as the method `getParams()` does only exist in the following implementations of said interface: `Slim\Http\Request`. Let’s take a look at an example: interface User { /** @return string / public function getPassword(); } class MyUser implements User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the interface: interface User { /** @return string / public function getPassword(); /* @return string */ public function getDisplayName(); } Loading history...
112	31	$params = array_merge((array) $request->getAttribute('routeInfo')[2], $params);
113	31	if ($this->isValidator) {
114	5	$this->validateParam($params, $this->validators);
		0 ignored issues – show Documentation introduced 2018-09-06 22:10 UTC by Report Bug Copy Issue Report `$params` is of type `array`, but the function expects a `object<DavidePastore\Slim\Validation\any>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history... Documentation introduced 2018-09-06 22:10 UTC by Report Bug Copy Issue Report `$this->validators` is of type `array`, but the function expects a `object<DavidePastore\Slim\Validation\any>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
115		} else {
116	26	$this->validate($params, $this->validators);
117		}
118
119	31	$request = $request->withAttribute($this->errors_name, $this->getErrors());
120	31	$request = $request->withAttribute($this->has_errors_name, $this->hasErrors());
121	31	$request = $request->withAttribute($this->validators_name, $this->getValidators());
122	31	$request = $request->withAttribute($this->translator_name, $this->getTranslator());
123
124	31	return $next($request, $response);
125		}
126
127		/**
128		* Validate the parameters by the given params, validators and actual keys.
129		* This method populates the $errors attribute.
130		*
131		* @param array $params The array of parameters.
132		* @param array $validators The array of validators.
133		* @param array $actualKeys An array that will save all the keys of the tree to retrieve the correct value.
134		*/
135	26	private function validate($params = [], $validators = [], $actualKeys = [])
136		{
137		//Validate every parameters in the validators array
138	26	foreach ($validators as $key => $validator) {
139	24	$actualKeys[] = $key;
140	24	$param = $this->getNestedParam($params, $actualKeys);
141	24	if (is_array($validator)) {
142	9	$this->validate($params, $validator, $actualKeys);
143		} else {
144	24	$this->validateParam($param, $validator, $actualKeys);
145		}
146
147		//Remove the key added in this foreach
148	24	array_pop($actualKeys);
149		}
150	26	}
151
152		/**
153		* Validate a param.
154		* @param any $param The parameter to validate.
155		* @param any $validator The validator to use to validate the given parameter.
156		* @param array $actualKeys An array with the position of the parameter.
157		*/
158	29	private function validateParam($param, $validator, $actualKeys = [])
159		{
160		try {
161	29	$validator->assert($param);
162	16	} catch (NestedValidationException $exception) {
163	16	if ($this->translator) {
164	2	$exception->setParam('translator', $this->translator);
165		}
166
167	16	$messages = $exception->getMessages();
168	16	if (empty($actualKeys)) {
169	2	$this->errors = $messages;
170		} else {
171	14	$this->errors[implode('.', $actualKeys)] = $messages;
172		}
173		}
174	29	}
175
176		/**
177		* Get the nested parameter value.
178		*
179		* @param array $params An array that represents the values of the parameters.
180		* @param array $keys An array that represents the tree of keys to use.
181		*
182		* @return mixed The nested parameter value by the given params and tree of keys.
183		*/
184	24	private function getNestedParam($params = [], $keys = [])
185		{
186	24	if (empty($keys)) {
187	22	return $params;
188		} else {
189	24	$firstKey = array_shift($keys);
190	24	if ($this->isArrayLike($params) && array_key_exists($firstKey, $params)) {
191	22	$params = (array) $params;
192	22	$paramValue = $params[$firstKey];
193
194	22	return $this->getNestedParam($paramValue, $keys);
195		} else {
196	3	return;
197		}
198		}
199		}
200
201		/**
202		* Check if the given $params is an array like variable.
203		*
204		* @param array $params The variable to check.
205		*
206		* @return boolean Returns true if the given $params parameter is array like.
207		*/
208	24	private function isArrayLike($params)
209		{
210	24	return is_array($params) \|\| $params instanceof \SimpleXMLElement;
211		}
212
213		/**
214		* Check if there are any errors.
215		*
216		* @return bool
217		*/
218	31	public function hasErrors()
219		{
220	31	return !empty($this->errors);
221		}
222
223		/**
224		* Get errors.
225		*
226		* @return array The errors array.
227		*/
228	31	public function getErrors()
229		{
230	31	return $this->errors;
231		}
232
233		/**
234		* Get validators.
235		*
236		* @return array The validators array.
237		*/
238	31	public function getValidators()
239		{
240	31	return $this->validators;
241		}
242
243		/**
244		* Set validators.
245		*
246		* @param array $validators The validators array.
247		*/
248	1	public function setValidators($validators)
249		{
250	1	$this->validators = $validators;
251	1	}
252
253		/**
254		* Get translator.
255		*
256		* @return callable The translator.
257		*/
258	31	public function getTranslator()
259		{
260	31	return $this->translator;
261		}
262
263		/**
264		* Set translator.
265		*
266		* @param callable $translator The translator.
267		*/
268	1	public function setTranslator($translator)
269		{
270	1	$this->translator = $translator;
271	1	}
272		}
273

DavidePastore / Slim-Validation

Pull Request — master (#40)

Validation::__invoke() A

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