Validator::__construct() - Code Metrics - Inspection of "Throw an exception instead of returning null for m..." - thephpleague/json-guard - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Branch — constraint-not-found (d3184e)

by Matt

created 2016-05-03 20:02 UTC

Validator::__construct() A

↳ Parent: Validator

Complexity

Conditions	4
Paths	5

Size

Total Lines	16
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	9
CRAP Score	4.25

Metric	Value
cc	4
eloc	9
nc	5
nop	3
dl	0
loc	16
ccs	9
cts	12
cp	0.75
crap	4.25
rs	9.2

<?php

namespace League\JsonGuard;

use League\JsonGuard\Constraints\Constraint;
use League\JsonGuard\Constraints\ContainerInstanceConstraint;
use League\JsonGuard\Constraints\ParentSchemaAwareContainerInstanceConstraint;
use League\JsonGuard\Constraints\ParentSchemaAwarePropertyConstraint;
use League\JsonGuard\Constraints\PropertyConstraint;
use League\JsonGuard\Exceptions\MaximumDepthExceededException;
use League\JsonGuard\RuleSets\DraftFour;

class Validator implements SubSchemaValidatorFactory
{
    /**
     * @var array
     */
    private $errors = [];

    /**
     * @var mixed
     */
    private $data;

    /**
     * @var object
     */
    private $schema;

    /**
     * @var string
     */
    private $pointer = '';

    /**
     * The maximum depth the validator should recurse into $data
     * before throwing an exception.
     *
     * @var int
     */
    private $maxDepth = 10;

    /**
     * The depth the validator has reached in the data.
     *
     * @var int
     */
    private $depth = 0;

    /**
     * @var \League\JsonGuard\FormatExtension[]
     */
    private $formatExtensions = [];

    /**
     * @var \League\JsonGuard\RuleSet
     */
    private $ruleSet;

    /**
     * @var bool
     */
    private $hasValidated;

    /**
     * @param mixed  $data
     * @param object $schema
     * @param RuleSet|null   $ruleSet
     */
    public function __construct($data, $schema, $ruleSet = null)
    {
        if (!is_object($schema)) {
            throw new \InvalidArgumentException(
                sprintf('The schema should be an object from a json_decode call, got "%s"', gettype($schema))
            );
        }

        if ($schema instanceof Reference) {
            $schema = $schema->resolve();
        }

        $this->data    = $data;
        $this->schema  = $schema;
        $this->ruleSet = $ruleSet ?: new DraftFour();
    }

    /**
     * @return boolean
     */
    public function fails()
    {
        return !$this->passes();
    }

    /**
     * @return boolean
     */
    public function passes()
    {
        return empty($this->errors());
    }

    /**
     * Get a collection of errors.
     *
     * @return ValidationError[]
     */
    public function errors()
    {
        $this->validate();

        return $this->errors;
    }

    /**
     * Set the maximum allowed depth data will be validated until.
     * If the data exceeds the stack depth an exception is thrown.
     *
     * @param int $maxDepth
     * @return $this
     */
    public function setMaxDepth($maxDepth)
    {
        $this->maxDepth = $maxDepth;

        return $this;
    }

    /**
     * Register a custom format validation extension.
     *
     * @param string          $format
     * @param FormatExtension $extension
     */
    public function registerFormatExtension($format, FormatExtension $extension)
    {
        $this->formatExtensions[$format] = $extension;
    }

    /**
     * @internal
     * @param int $depth
     * @return $this
     */
    public function setDepth($depth)
    {
        $this->depth = $depth;

        return $this;
    }

    /**
     * @internal
     * @return string
     */
    public function getPointer()
    {
        return $this->pointer;
    }

    /**
     * @internal
     * @param string $pointer
     * @return $this
     */
    public function setPointer($pointer)
    {
        $this->pointer = $pointer;

        return $this;
    }

    /**
     * Create a new sub-validator.
     *
     * @param mixed  $data
     * @param object $schema
     * @param string $pointer
     * @return Validator
     */
    public function makeSubSchemaValidator($data, $schema, $pointer)
    {
        return (new Validator($data, $schema))
            ->setPointer($pointer)
            ->setMaxDepth($this->maxDepth)
            ->setDepth($this->depth + 1);
    }

    /**
     * Validate the data and collect the errors.
     */
    private function validate()
    {
        if ($this->hasValidated) {
            return;
        }

        $this->checkDepth();

        foreach ($this->schema as $rule => $parameter) {
            $errors = $this->validateRule($rule, $parameter);
            $this->mergeErrors($errors);
        }

        $this->hasValidated = true;
    }

    /**
     * Keep track of how many levels deep we have validated.
     * This is to prevent a really deeply nested JSON
     * structure from causing the validator to continue
     * validating for an incredibly long time.
     *
     * @throws \League\JsonGuard\Exceptions\MaximumDepthExceededException
     */
    private function checkDepth()
    {
        if ($this->depth > $this->maxDepth) {
            throw new MaximumDepthExceededException();
        }
    }

    /**
     * Validate the data using the given rule and parameter.
     *
     * @param string $rule
     * @param mixed $parameter
     * @return null|ValidationError|ValidationError[]
     */
    private function validateRule($rule, $parameter)
    {
        if (!$this->ruleSet->has($rule)) {
            return null;
        }

        if ($this->isCustomFormatExtension($rule, $parameter)) {
            return $this->validateCustomFormat($parameter);
        }

        $constraint = $this->ruleSet->getConstraint($rule);

        return $this->invokeConstraint($constraint, $parameter);
    }

    /**
     * Invoke the given constraint and return the validation errors.
     *
     * @param \League\JsonGuard\Constraints\Constraint $constraint
     * @param mixed                                    $parameter
     *
     * @return \League\JsonGuard\ValidationError|\League\JsonGuard\ValidationError[]|null
     */
    private function invokeConstraint(Constraint $constraint, $parameter)
    {
        if ($constraint instanceof PropertyConstraint) {
            return $constraint::validate($this->data, $parameter, $this->getPointer());
        } elseif ($constraint instanceof ParentSchemaAwarePropertyConstraint) {
            return $constraint::validate($this->data, $this->schema, $parameter, $this->getPointer());
        } elseif ($constraint instanceof ContainerInstanceConstraint) {
            return $constraint::validate($this->data, $parameter, $this, $this->getPointer());
        } elseif ($constraint instanceof ParentSchemaAwareContainerInstanceConstraint) {
            return $constraint::validate($this->data, $this->schema, $parameter, $this, $this->getPointer());
        }

        throw new \InvalidArgumentException('Invalid constraint.');
    }

    /**
     * Determine if a rule has a custom format extension registered.
     *
     * @param string $rule
     * @param mixed $parameter
     *
     * @return bool
     */
    private function isCustomFormatExtension($rule, $parameter)
    {
        return $rule === 'format' && isset($this->formatExtensions[$parameter]);
    }

    /**
     * Call a custom format extension to validate the data.
     *
     * @param string $format
     *
     * @return ValidationError|null
     */
    private function validateCustomFormat($format)
    {
        /** @var FormatExtension $extension */
        $extension = $this->formatExtensions[$format];

        return $extension->validate($this->data, $this->getPointer());
    }

    /**
     * Merge the errors with our error collection.
     *
     * @param ValidationError[]|ValidationError|null $errors
     */
    private function mergeErrors($errors)
    {
        if (is_null($errors)) {
            return;
        }

        if (is_array($errors)) {
            $this->errors = array_merge($this->errors, $errors);
            return;
        }

        $this->errors[] = $errors;
    }
}


1		<?php
2
3		namespace League\JsonGuard;
4
5		use League\JsonGuard\Constraints\Constraint;
6		use League\JsonGuard\Constraints\ContainerInstanceConstraint;
7		use League\JsonGuard\Constraints\ParentSchemaAwareContainerInstanceConstraint;
8		use League\JsonGuard\Constraints\ParentSchemaAwarePropertyConstraint;
9		use League\JsonGuard\Constraints\PropertyConstraint;
10		use League\JsonGuard\Exceptions\MaximumDepthExceededException;
11		use League\JsonGuard\RuleSets\DraftFour;
12
13		class Validator implements SubSchemaValidatorFactory
14		{
15		/**
16		* @var array
17		*/
18		private $errors = [];
19
20		/**
21		* @var mixed
22		*/
23		private $data;
24
25		/**
26		* @var object
27		*/
28		private $schema;
29
30		/**
31		* @var string
32		*/
33		private $pointer = '';
34
35		/**
36		* The maximum depth the validator should recurse into $data
37		* before throwing an exception.
38		*
39		* @var int
40		*/
41		private $maxDepth = 10;
42
43		/**
44		* The depth the validator has reached in the data.
45		*
46		* @var int
47		*/
48		private $depth = 0;
49
50		/**
51		* @var \League\JsonGuard\FormatExtension[]
52		*/
53		private $formatExtensions = [];
54
55		/**
56		* @var \League\JsonGuard\RuleSet
57		*/
58		private $ruleSet;
59
60		/**
61		* @var bool
62		*/
63		private $hasValidated;
64
65		/**
66		* @param mixed $data
67		* @param object $schema
68		* @param RuleSet\|null $ruleSet
69		*/
70	72	public function __construct($data, $schema, $ruleSet = null)
71		{
72	72	if (!is_object($schema)) {
73		throw new \InvalidArgumentException(
74		sprintf('The schema should be an object from a json_decode call, got "%s"', gettype($schema))
75		);
76		}
77
78	72	if ($schema instanceof Reference) {
79	14	$schema = $schema->resolve();
80	14	}
81
82	72	$this->data = $data;
83	72	$this->schema = $schema;
84	72	$this->ruleSet = $ruleSet ?: new DraftFour();
85	72	}
86
87		/**
88		* @return boolean
89		*/
90	72	public function fails()
91		{
92	72	return !$this->passes();
93		}
94
95		/**
96		* @return boolean
97		*/
98	72	public function passes()
99		{
100	72	return empty($this->errors());
101		}
102
103		/**
104		* Get a collection of errors.
105		*
106		* @return ValidationError[]
107		*/
108	72	public function errors()
109		{
110	72	$this->validate();
111
112	70	return $this->errors;
113		}
114
115		/**
116		* Set the maximum allowed depth data will be validated until.
117		* If the data exceeds the stack depth an exception is thrown.
118		*
119		* @param int $maxDepth
120		* @return $this
121		*/
122	38	public function setMaxDepth($maxDepth)
123		{
124	38	$this->maxDepth = $maxDepth;
125
126	38	return $this;
127		}
128
129		/**
130		* Register a custom format validation extension.
131		*
132		* @param string $format
133		* @param FormatExtension $extension
134		*/
135	2	public function registerFormatExtension($format, FormatExtension $extension)
136		{
137	2	$this->formatExtensions[$format] = $extension;
138	2	}
139
140		/**
141		* @internal
142		* @param int $depth
143		* @return $this
144		*/
145	38	public function setDepth($depth)
146		{
147	38	$this->depth = $depth;
148
149	38	return $this;
150		}
151
152		/**
153		* @internal
154		* @return string
155		*/
156	72	public function getPointer()
157		{
158	72	return $this->pointer;
159		}
160
161		/**
162		* @internal
163		* @param string $pointer
164		* @return $this
165		*/
166	38	public function setPointer($pointer)
167		{
168	38	$this->pointer = $pointer;
169
170	38	return $this;
171		}
172
173		/**
174		* Create a new sub-validator.
175		*
176		* @param mixed $data
177		* @param object $schema
178		* @param string $pointer
179		* @return Validator
180		*/
181	38	public function makeSubSchemaValidator($data, $schema, $pointer)
182		{
183	38	return (new Validator($data, $schema))
184	38	->setPointer($pointer)
185	38	->setMaxDepth($this->maxDepth)
186	38	->setDepth($this->depth + 1);
187		}
188
189		/**
190		* Validate the data and collect the errors.
191		*/
192	72	private function validate()
193		{
194	72	if ($this->hasValidated) {
195	24	return;
196		}
197
198	72	$this->checkDepth();
199
200	72	foreach ($this->schema as $rule => $parameter) {
201	72	$errors = $this->validateRule($rule, $parameter);
202	70	$this->mergeErrors($errors);
203	70	}
204
205	70	$this->hasValidated = true;
206	70	}
207
208		/**
209		* Keep track of how many levels deep we have validated.
210		* This is to prevent a really deeply nested JSON
211		* structure from causing the validator to continue
212		* validating for an incredibly long time.
213		*
214		* @throws \League\JsonGuard\Exceptions\MaximumDepthExceededException
215		*/
216	72	private function checkDepth()
217		{
218	72	if ($this->depth > $this->maxDepth) {
219	4	throw new MaximumDepthExceededException();
220		}
221	72	}
222
223		/**
224		* Validate the data using the given rule and parameter.
225		*
226		* @param string $rule
227		* @param mixed $parameter
228		* @return null\|ValidationError\|ValidationError[]
229		*/
230	72	private function validateRule($rule, $parameter)
231		{
232	72	if (!$this->ruleSet->has($rule)) {
233	14	return null;
234		}
235
236	72	if ($this->isCustomFormatExtension($rule, $parameter)) {
237	2	return $this->validateCustomFormat($parameter);
238		}
239
240	70	$constraint = $this->ruleSet->getConstraint($rule);
241
242	70	return $this->invokeConstraint($constraint, $parameter);
243		}
244
245		/**
246		* Invoke the given constraint and return the validation errors.
247		*
248		* @param \League\JsonGuard\Constraints\Constraint $constraint
249		* @param mixed $parameter
250		*
251		* @return \League\JsonGuard\ValidationError\|\League\JsonGuard\ValidationError[]\|null
252		*/
253	70	private function invokeConstraint(Constraint $constraint, $parameter)
254		{
255	70	if ($constraint instanceof PropertyConstraint) {
256	58	return $constraint::validate($this->data, $parameter, $this->getPointer());
257	44	} elseif ($constraint instanceof ParentSchemaAwarePropertyConstraint) {
258	18	return $constraint::validate($this->data, $this->schema, $parameter, $this->getPointer());
259	38	} elseif ($constraint instanceof ContainerInstanceConstraint) {
260	38	return $constraint::validate($this->data, $parameter, $this, $this->getPointer());
261	16	} elseif ($constraint instanceof ParentSchemaAwareContainerInstanceConstraint) {
262	16	return $constraint::validate($this->data, $this->schema, $parameter, $this, $this->getPointer());
263		}
264
265		throw new \InvalidArgumentException('Invalid constraint.');
266		}
267
268		/**
269		* Determine if a rule has a custom format extension registered.
270		*
271		* @param string $rule
272		* @param mixed $parameter
273		*
274		* @return bool
275		*/
276	72	private function isCustomFormatExtension($rule, $parameter)
277		{
278	72	return $rule === 'format' && isset($this->formatExtensions[$parameter]);
279		}
280
281		/**
282		* Call a custom format extension to validate the data.
283		*
284		* @param string $format
285		*
286		* @return ValidationError\|null
287		*/
288	2	private function validateCustomFormat($format)
289		{
290		/** @var FormatExtension $extension */
291	2	$extension = $this->formatExtensions[$format];
292
293	2	return $extension->validate($this->data, $this->getPointer());
294		}
295
296		/**
297		* Merge the errors with our error collection.
298		*
299		* @param ValidationError[]\|ValidationError\|null $errors
300		*/
301	70	private function mergeErrors($errors)
302		{
303	70	if (is_null($errors)) {
304	68	return;
305		}
306
307	70	if (is_array($errors)) {
308	32	$this->errors = array_merge($this->errors, $errors);
309	32	return;
310		}
311
312	66	$this->errors[] = $errors;
313	66	}
314		}
315

thephpleague / json-guard

Branch — constraint-not-found (d3184e)

Validator::__construct() A

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