MongoCache - Code Metrics - Inspection of "Switch to PSR-16 cache" - chadicus/marvel-api-client - Measure and Improve Code Quality continuously with Scrutinizer

Failed Conditions

Push — v3.x ( babbd8...d960e5 )

by Chad

created 2017-04-02 14:32 UTC

MongoCache A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	252
Duplicated Lines	3.57 %

Coupling/Cohesion

Components	1
Dependencies	4

Importance

Changes

Metric	Value
wmc	22
lcom	1
cbo	4
dl	9
loc	252
rs	10
c	0
b	0
f	0

11 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	get()	0	20	2
A	set()	0	6	1
A	delete()	0	10	2
A	clear()	0	9	2
A	getMultiple()	9	9	2
A	setMultiple()	0	15	3
A	deleteMultiple()	0	11	2
A	has()	0	5	1
A	updateCache()	0	18	2
A	getExpires()	0	16	4

How to fix Duplicated Code

<?php

namespace Chadicus\Marvel\Api\Cache;

use DominionEnterprises\Util\Arrays;
use GuzzleHttp\Psr7\Response;
use MongoDB\BSON\UTCDateTime;
use Psr\Http\Message\ResponseInterface;
use Psr\SimpleCache\CacheInterface;

/**
 * A PSR-16 implementation which stores data in an array.
 */
final class MongoCache extends AbstractCache implements CacheInterface
{
    /**
     * MongoDB collection containing the cached responses.
     *
     * @var Collection
     */
    private $collection;

    /**
     * Construct a new instance of MongoCache.
     *
     * @param Collection $collection        The collection containing the cached data.
     * @param integer    $defaultTimeToLive The default time to live in seconds.
/**
 * @param array $germany
 * @param array $island
 * @param array $italy
 */
function finale($germany, $island) {
    return "2:1";
}
     */
    public function __construct(Collection $collection)
    {
        $this->collection = $collection;
        $this->collection->createIndex(['expires' => 1], ['expireAfterSeconds' => 0, 'background' => true]);
    }

    /**
     * Fetches a value from the cache.
     *
     * @param string $key     The unique key of this item in the cache.
     * @param mixed  $default Default value to return if the key does not exist.
     *
     * @return mixed The value of the item from the cache, or $default in case of cache miss.
     *
     * @throws InvalidArgumentException Thrown if the $key string is not a legal value.
     */
    public function get($key, $default = null)
    {
        $this->verifyKey($key);
        $cached = $this->collection->findOne(
            ['_id' => $key],
            ['typeMap' => ['root' => 'array', 'document' => 'array', 'array' => 'array']]
        );

        if ($cached === null) {
            return $default;
        }

        return new Response(
            $cached['statusCode'],
            $cached['headers'],
            $cached['body'],
            $cached['protocolVersion'],
            $cached['reasonPhrase']
        );
    }

    /**
     * Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time.
     *
     * @param string                $key   The key of the item to store.
     * @param mixed                 $value The value of the item to store, must be serializable.
     * @param null|int|DateInterval $ttl   Optional. The TTL value of this item. If no value is sent and
     *                                     the driver supports TTL then the library may set a default value
     *                                     for it or let the driver take care of that.
     *
     * @return bool True on success and false on failure.
     *
     * @throws InvalidArgumentException Thrown if the $key string is not a legal value.
     */
    public function set($key, $value, $ttl = null)
    {
        $this->verifyKey($key);
        $this->verifyValue($value);
        return $this->updateCache($key, $value, $this->getExpires($ttl));
    }

    /**
     * Delete an item from the cache by its unique key.
     *
     * @param string $key The unique cache key of the item to delete.
     *
     * @return bool True if the item was successfully removed. False if there was an error.
     *
     * @throws InvalidArgumentException Thrown if the $key string is not a legal value.
     */
    public function delete($key)
    {
        $this->verifyKey($key);
        try {
            $this->collection->deleteOne(['_id' => $key]);
            return true;
        } catch (\Exception $e) {
            return false;
        }
    }

    /**
     * Wipes clean the entire cache's keys.
     *
     * @return bool True on success and false on failure.
     */
    public function clear()
    {
        try {
            $this->collection->deleteMany([]);
            return true;
        } catch (\Exception $e) {
            return false;
        }
    }

    /**
     * Obtains multiple cache items by their unique keys.
     *
     * @param iterable $keys    A list of keys that can obtained in a single operation.
     * @param mixed    $default Default value to return for keys that do not exist.
     *
     * @return iterable A list of key => value pairs. Cache keys that do not exist or are stale will have $default as value.
     *
     * @throws InvalidArgumentException Thrown if the $key string is not a legal value.
     */
    public function getMultiple($keys, $default = null)

    {
        $items = [];
        foreach ($keys as $key) {
            $items[$key] = $this->get($key, $default);
        }

        return $items;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * Persists a set of key => value pairs in the cache, with an optional TTL.
     *
     * @param iterable              $values A list of key => value pairs for a multiple-set operation.
     * @param null|int|DateInterval $ttl    Optional. The TTL value of this item. If no value is sent and
     *                                      the driver supports TTL then the library may set a default value
     *                                      for it or let the driver take care of that.
     *
     * @return bool True on success and false on failure.
     *
     * @throws InvalidArgumentException Thrown if $values is neither an array nor a Traversable,
     *                                  or if any of the $values are not a legal value.
     */
    public function setMultiple($values, $ttl = null)
    {
        foreach ($values as $key => $value) {
            $this->verfiyKey($key);

            $this->verifyValue($value);
            $expires = $this->getExpires($ttl);
            try {
                $this->updateCache($key, $value, $expires);
            } catch (\Exception $e) {
                return false;
            }
        }

        return true;
    }

    /**
     * Deletes multiple cache items in a single operation.
     *
     * @param iterable $keys A list of string-based keys to be deleted.
     *
     * @return bool True if the items were successfully removed. False if there was an error.
     *
     * @throws InvalidArgumentException Thrown if $keys is neither an array nor a Traversable,
     *                                  or if any of the $keys are not a legal value.
     */
    public function deleteMultiple($keys)
    {
        array_walk($keys, [$this, 'verifyKey']);

        try {
            $deleteManyResult = $this->deleteMany(['_id' => ['$in' => $keys]]);

            return $deleteManyResult->getDeletedCount() === count($keys);
        } catch (\Exception $e) {
            return false;
        }
    }

    /**
     * Determines whether an item is present in the cache.
     *
     * NOTE: It is recommended that has() is only to be used for cache warming type purposes
     * and not to be used within your live applications operations for get/set, as this method
     * is subject to a race condition where your has() will return true and immediately after,
     * another script can remove it making the state of your app out of date.
     *
     * @param string $key The cache item key.
     *
     * @return bool
     *
     * @throws InvalidArgumentException Thrown if the $key string is not a legal value.
     */
    public function has($key)
    {
        $this->verifyKey($key);
        return $this->collection->count(['_id' => $key]) === 1;
    }

    /**
     * Upserts a PSR-7 response in the cache.
     *
     * @param string $key The key of the response to store.
     * @param ResponseInterface $response The response to store.
     * @param UTCDateTime $expires The expire date of the cache item.
     *
     * @return bool
     */
    private function updateCache(string $key, ResponseInterface $response, UTCDateTime $expires) : bool

    {
        $document = [
            'statusCode' => $response->getStatusCode(),
            'headers' => $response->getHeaders(),
            'body' => (string)$response->getBody(),
            'protocolVersion' => $response->getProtocolVersion(),
            'reasonPhrase' => $response->getReasonPhrase(),
            'expires' => $expires,
        ];

        try {
            $this->collection->updateOne(['_id' => $id], ['$set' => $document], ['upsert' => true]);

            return true;
        } catch (\Exception $e) {
            return false;
        }
    }

    /**
     * Converts the given time to live value to a UTCDateTime instance;
     *
     * @param mixed $key The cache key to validate.
/**
 * @param array $germany
 * @param array $island
 * @param array $italy
 */
function finale($germany, $island) {
    return "2:1";
}
     *
     * @return UTCDateTime
     *
     * @throws InvalidArgumentException Thrown if the $ttl is not null, an integer or \DateInterval.
     */
    private function getExpires($ttl)
    {
        if ($ttl === null) {
            $ttl = 86400;
        }

        if ($ttl instanceof \DateInterval) {
            $ttl = $ttl->s;
        }

        if (is_int($ttl)) {
            return new UTCDateTime((time() + $ttl) * 1000);
        }

        throw new InvalidArgumentException('$ttl must be null, an integer or \DateInterval instance');
    }
}


1		<?php
2
3		namespace Chadicus\Marvel\Api\Cache;
4
5		use DominionEnterprises\Util\Arrays;
6		use GuzzleHttp\Psr7\Response;
7		use MongoDB\BSON\UTCDateTime;
8		use Psr\Http\Message\ResponseInterface;
9		use Psr\SimpleCache\CacheInterface;
10
11		/**
12		* A PSR-16 implementation which stores data in an array.
13		*/
14		final class MongoCache extends AbstractCache implements CacheInterface
15		{
16		/**
17		* MongoDB collection containing the cached responses.
18		*
19		* @var Collection
20		*/
21		private $collection;
22
23		/**
24		* Construct a new instance of MongoCache.
25		*
26		* @param Collection $collection The collection containing the cached data.
27		* @param integer $defaultTimeToLive The default time to live in seconds.
		0 ignored issues – show Bug introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report There is no parameter named `$defaultTimeToLive`. Was it maybe removed? This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function. Consider the following example. The parameter `$italy` is not defined by the method `finale(...)`. /** * @param array $germany * @param array $island * @param array $italy */ function finale($germany, $island) { return "2:1"; } The most likely cause is that the parameter was removed, but the annotation was not. Loading history...
28		*/
29		public function __construct(Collection $collection)
30		{
31		$this->collection = $collection;
32		$this->collection->createIndex(['expires' => 1], ['expireAfterSeconds' => 0, 'background' => true]);
33		}
34
35		/**
36		* Fetches a value from the cache.
37		*
38		* @param string $key The unique key of this item in the cache.
39		* @param mixed $default Default value to return if the key does not exist.
40		*
41		* @return mixed The value of the item from the cache, or $default in case of cache miss.
42		*
43		* @throws InvalidArgumentException Thrown if the $key string is not a legal value.
44		*/
45		public function get($key, $default = null)
46		{
47		$this->verifyKey($key);
48		$cached = $this->collection->findOne(
49		['_id' => $key],
50		['typeMap' => ['root' => 'array', 'document' => 'array', 'array' => 'array']]
51		);
52
53		if ($cached === null) {
54		return $default;
55		}
56
57		return new Response(
58		$cached['statusCode'],
59		$cached['headers'],
60		$cached['body'],
61		$cached['protocolVersion'],
62		$cached['reasonPhrase']
63		);
64		}
65
66		/**
67		* Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time.
68		*
69		* @param string $key The key of the item to store.
70		* @param mixed $value The value of the item to store, must be serializable.
71		* @param null\|int\|DateInterval $ttl Optional. The TTL value of this item. If no value is sent and
72		* the driver supports TTL then the library may set a default value
73		* for it or let the driver take care of that.
74		*
75		* @return bool True on success and false on failure.
76		*
77		* @throws InvalidArgumentException Thrown if the $key string is not a legal value.
78		*/
79		public function set($key, $value, $ttl = null)
80		{
81		$this->verifyKey($key);
82		$this->verifyValue($value);
83		return $this->updateCache($key, $value, $this->getExpires($ttl));
84		}
85
86		/**
87		* Delete an item from the cache by its unique key.
88		*
89		* @param string $key The unique cache key of the item to delete.
90		*
91		* @return bool True if the item was successfully removed. False if there was an error.
92		*
93		* @throws InvalidArgumentException Thrown if the $key string is not a legal value.
94		*/
95		public function delete($key)
96		{
97		$this->verifyKey($key);
98		try {
99		$this->collection->deleteOne(['_id' => $key]);
100		return true;
101		} catch (\Exception $e) {
102		return false;
103		}
104		}
105
106		/**
107		* Wipes clean the entire cache's keys.
108		*
109		* @return bool True on success and false on failure.
110		*/
111		public function clear()
112		{
113		try {
114		$this->collection->deleteMany([]);
115		return true;
116		} catch (\Exception $e) {
117		return false;
118		}
119		}
120
121		/**
122		* Obtains multiple cache items by their unique keys.
123		*
124		* @param iterable $keys A list of keys that can obtained in a single operation.
125		* @param mixed $default Default value to return for keys that do not exist.
126		*
127		* @return iterable A list of key => value pairs. Cache keys that do not exist or are stale will have $default as value.
128		*
129		* @throws InvalidArgumentException Thrown if the $key string is not a legal value.
130		*/
131	View Code Duplication	public function getMultiple($keys, $default = null)
		0 ignored issues – show Duplication introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
132		{
133		$items = [];
134		foreach ($keys as $key) {
135		$items[$key] = $this->get($key, $default);
136		}
137
138		return $items;
		0 ignored issues – show Bug Best Practice introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report The return type of `return $items;` (`array`) is incompatible with the return type declared by the interface `Psr\SimpleCache\CacheInterface::getMultiple` of type `Psr\SimpleCache\iterable`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
139		}
140
141		/**
142		* Persists a set of key => value pairs in the cache, with an optional TTL.
143		*
144		* @param iterable $values A list of key => value pairs for a multiple-set operation.
145		* @param null\|int\|DateInterval $ttl Optional. The TTL value of this item. If no value is sent and
146		* the driver supports TTL then the library may set a default value
147		* for it or let the driver take care of that.
148		*
149		* @return bool True on success and false on failure.
150		*
151		* @throws InvalidArgumentException Thrown if $values is neither an array nor a Traversable,
152		* or if any of the $values are not a legal value.
153		*/
154		public function setMultiple($values, $ttl = null)
155		{
156		foreach ($values as $key => $value) {
157		$this->verfiyKey($key);
		0 ignored issues – show Bug introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report The method `verfiyKey()` does not seem to exist on `object<Chadicus\Marvel\Api\Cache\MongoCache>`. This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces. This is most likely a typographical error or the method has been renamed. Loading history...
158		$this->verifyValue($value);
159		$expires = $this->getExpires($ttl);
160		try {
161		$this->updateCache($key, $value, $expires);
162		} catch (\Exception $e) {
163		return false;
164		}
165		}
166
167		return true;
168		}
169
170		/**
171		* Deletes multiple cache items in a single operation.
172		*
173		* @param iterable $keys A list of string-based keys to be deleted.
174		*
175		* @return bool True if the items were successfully removed. False if there was an error.
176		*
177		* @throws InvalidArgumentException Thrown if $keys is neither an array nor a Traversable,
178		* or if any of the $keys are not a legal value.
179		*/
180		public function deleteMultiple($keys)
181		{
182		array_walk($keys, [$this, 'verifyKey']);
183
184		try {
185		$deleteManyResult = $this->deleteMany(['_id' => ['$in' => $keys]]);
		0 ignored issues – show Bug introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report The method `deleteMany()` does not exist on `Chadicus\Marvel\Api\Cache\MongoCache`. Did you maybe mean `delete()`? This check marks calls to methods that do not seem to exist on an object. This is most likely the result of a method being renamed without all references to it being renamed likewise. Loading history...
186		return $deleteManyResult->getDeletedCount() === count($keys);
187		} catch (\Exception $e) {
188		return false;
189		}
190		}
191
192		/**
193		* Determines whether an item is present in the cache.
194		*
195		* NOTE: It is recommended that has() is only to be used for cache warming type purposes
196		* and not to be used within your live applications operations for get/set, as this method
197		* is subject to a race condition where your has() will return true and immediately after,
198		* another script can remove it making the state of your app out of date.
199		*
200		* @param string $key The cache item key.
201		*
202		* @return bool
203		*
204		* @throws InvalidArgumentException Thrown if the $key string is not a legal value.
205		*/
206		public function has($key)
207		{
208		$this->verifyKey($key);
209		return $this->collection->count(['_id' => $key]) === 1;
210		}
211
212		/**
213		* Upserts a PSR-7 response in the cache.
214		*
215		* @param string $key The key of the response to store.
216		* @param ResponseInterface $response The response to store.
217		* @param UTCDateTime $expires The expire date of the cache item.
218		*
219		* @return bool
220		*/
221		private function updateCache(string $key, ResponseInterface $response, UTCDateTime $expires) : bool
		0 ignored issues – show Unused Code introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report The parameter `$key` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
222		{
223		$document = [
224		'statusCode' => $response->getStatusCode(),
225		'headers' => $response->getHeaders(),
226		'body' => (string)$response->getBody(),
227		'protocolVersion' => $response->getProtocolVersion(),
228		'reasonPhrase' => $response->getReasonPhrase(),
229		'expires' => $expires,
230		];
231
232		try {
233		$this->collection->updateOne(['_id' => $id], ['$set' => $document], ['upsert' => true]);
		0 ignored issues – show Bug introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report The variable `$id` does not exist. Did you forget to declare it? This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug. Loading history...
234		return true;
235		} catch (\Exception $e) {
236		return false;
237		}
238		}
239
240		/**
241		* Converts the given time to live value to a UTCDateTime instance;
242		*
243		* @param mixed $key The cache key to validate.
		0 ignored issues – show Bug introduced 2017-04-02 14:34 UTC by Report Bug Copy Issue Report There is no parameter named `$key`. Was it maybe removed? This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function. Consider the following example. The parameter `$italy` is not defined by the method `finale(...)`. /** * @param array $germany * @param array $island * @param array $italy */ function finale($germany, $island) { return "2:1"; } The most likely cause is that the parameter was removed, but the annotation was not. Loading history...
244		*
245		* @return UTCDateTime
246		*
247		* @throws InvalidArgumentException Thrown if the $ttl is not null, an integer or \DateInterval.
248		*/
249		private function getExpires($ttl)
250		{
251		if ($ttl === null) {
252		$ttl = 86400;
253		}
254
255		if ($ttl instanceof \DateInterval) {
256		$ttl = $ttl->s;
257		}
258
259		if (is_int($ttl)) {
260		return new UTCDateTime((time() + $ttl) * 1000);
261		}
262
263		throw new InvalidArgumentException('$ttl must be null, an integer or \DateInterval instance');
264		}
265		}
266

chadicus / marvel-api-client

Push — v3.x ( babbd8...d960e5 )

MongoCache A

Complexity

Size/Duplication

Coupling/Cohesion

Importance

11 Methods

How to fix Duplicated Code

Duplicated Code

Duplication Side-by-Side

Filter issues like