BrowscapUpdater - Code Metrics - Inspection of "Merge pull request #214 from mimmi20/master" - browscap/browscap-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 41d47b...c28fef )

by James

created 2017-08-29 19:19 UTC

BrowscapUpdater B

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	363
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	14

Test Coverage

Coverage

86.36%

Importance

Changes	6
Bugs	1	Features	1

Metric	Value
wmc	40
lcom	1
cbo	14
dl	0
loc	363
ccs	114
cts	132
cp	0.8636
rs	8.2608
c	6
b	1
f	1

14 Methods

Rating	Name	Size	Complexity
A	getCache()	14	2
A	setLogger()	6	1
A	getLogger()	8	2
A	setConnectTimeout()	4	1
A	getClient()	8	2
A	setClient()	4	1
A	convertFile()	18	4
A	convertString()	7	1
B	fetch()	47	6
B	update()	39	5
A	sanitizeContent()	8	1
A	storeContent()	11	3
A	setCache()	16	3
B	checkUpdate()	55	8

How to fix Complexity

<?php
declare(strict_types = 1);

namespace BrowscapPHP;

use BrowscapPHP\Cache\BrowscapCache;
use BrowscapPHP\Cache\BrowscapCacheInterface;
use BrowscapPHP\Exception\FetcherException;
use BrowscapPHP\Helper\Converter;
use BrowscapPHP\Helper\Filesystem;
use BrowscapPHP\Helper\IniLoader;
use GuzzleHttp\Client;
use GuzzleHttp\ClientInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use WurflCache\Adapter\AdapterInterface;
use WurflCache\Adapter\File;

/**
 * Browscap.ini parsing class with caching and update capabilities
 */
final class BrowscapUpdater
{
    /**
     * The cache instance
     *
     * @var \BrowscapPHP\Cache\BrowscapCacheInterface|null
     */
    private $cache;

    /**
     * @var @var \Psr\Log\LoggerInterface|null
     */
    private $logger;

    /**
     * @var \GuzzleHttp\ClientInterface|null
     */
    private $client;

    /**
     * Curl connect timeout in seconds
     *
     * @var int
     */
    private $connectTimeout = 5;

    /**
     * Gets a cache instance
     *
     * @return \BrowscapPHP\Cache\BrowscapCacheInterface
     */
    public function getCache() : BrowscapCacheInterface
    {
        if (null === $this->cache) {
            $cacheDirectory = __DIR__ . '/../resources/';

            $cacheAdapter = new File(
                [File::DIR => $cacheDirectory]
            );

            $this->cache = new BrowscapCache($cacheAdapter);
        }

        return $this->cache;
    }

    /**
     * Sets a cache instance
     *
     * @param \BrowscapPHP\Cache\BrowscapCacheInterface|\WurflCache\Adapter\AdapterInterface $cache
     * @throws \BrowscapPHP\Exception
     * @return self
     */
    public function setCache($cache) : self
    {
        if ($cache instanceof BrowscapCacheInterface) {
            $this->cache = $cache;
        } elseif ($cache instanceof AdapterInterface) {
            $this->cache = new BrowscapCache($cache);
        } else {
            throw new Exception(
                'the cache has to be an instance of \BrowscapPHP\Cache\BrowscapCacheInterface or '
                . 'an instanceof of \WurflCache\Adapter\AdapterInterface',
                Exception::CACHE_INCOMPATIBLE
            );
        }

        return $this;
    }

    /**
     * Sets a logger instance
     *
     * @param \Psr\Log\LoggerInterface $logger
     *
     * @return self
     */
    public function setLogger(LoggerInterface $logger) : self
    {
        $this->logger = $logger;

        return $this;
    }

    /**
     * returns a logger instance
     *
     * @return \Psr\Log\LoggerInterface
     */
    public function getLogger() : LoggerInterface
    {
        if (null === $this->logger) {
            $this->logger = new NullLogger();
        }

        return $this->logger;
    }

    /**
     * Sets the Connection Timeout
     *
     * @param int $connectTimeout
     */
    public function setConnectTimeout(int $connectTimeout) : void
    {
        $this->connectTimeout = $connectTimeout;
    }

    public function getClient() : ClientInterface
    {
        if (null === $this->client) {
            $this->client = new Client();
        }

        return $this->client;
    }

    public function setClient(ClientInterface $client)
    {
        $this->client = $client;
    }

    /**
     * reads and parses an ini file and writes the results into the cache
     *
     * @param string $iniFile
     * @throws \BrowscapPHP\Exception
     */
    public function convertFile(string $iniFile) : void
    {
        if (empty($iniFile)) {
            throw new Exception('the file name can not be empty');
        }

        if (! is_readable($iniFile)) {
            throw new Exception('it was not possible to read the local file ' . $iniFile);
        }

        try {
            $iniString = file_get_contents($iniFile);
        } catch (Helper\Exception $e) {
            throw new Exception('an error occured while converting the local file into the cache', 0, $e);
        }

        $this->convertString($iniString);
    }

    /**
     * reads and parses an ini string and writes the results into the cache
     *
     * @param string $iniString
     */
    public function convertString(string $iniString) : void
    {
        $cachedVersion = $this->getCache()->getItem('browscap.version', false, $success);
        $converter = new Converter($this->getLogger(), $this->getCache());

        $this->storeContent($converter, $iniString, $cachedVersion);
    }

    /**
     * fetches a remote file and stores it into a local folder
     *
     * @param string $file The name of the file where to store the remote content
     * @param string $remoteFile The code for the remote file to load
     *
     * @throws \BrowscapPHP\Exception\FetcherException
     * @throws \BrowscapPHP\Helper\Exception
     * @throws \GuzzleHttp\Exception\GuzzleException
     */
    public function fetch(string $file, string $remoteFile = IniLoader::PHP_INI) : void
    {
        if (null === ($cachedVersion = $this->checkUpdate())) {
            // no newer version available
            return;
        }

        $this->getLogger()->debug('started fetching remote file');

        $uri = (new IniLoader())->setRemoteFilename($remoteFile)->getRemoteIniUrl();

        /** @var \Psr\Http\Message\ResponseInterface $response */
        $response = $this->getClient()->request('get', $uri, ['connect_timeout' => $this->connectTimeout]);

        if ($response->getStatusCode() !== 200) {
            throw new FetcherException(
                'an error occured while fetching remote data from URI ' . $uri . ': StatusCode was '
                . $response->getStatusCode()
            );
        }

        try {
            $content = $response->getBody()->getContents();
        } catch (\Exception $e) {
            throw new FetcherException('an error occured while fetching remote data', 0, $e);
        }

        if (empty($content)) {
            $error = error_get_last();
            throw FetcherException::httpError($uri, $error['message']);
        }

        $this->getLogger()->debug('finished fetching remote file');
        $this->getLogger()->debug('started storing remote file into local file');

        $content = $this->sanitizeContent($content);

        $converter = new Converter($this->getLogger(), $this->getCache());
        $iniVersion = $converter->getIniVersion($content);

        if ($iniVersion > $cachedVersion) {
            $fs = new Filesystem();
            $fs->dumpFile($file, $content);
        }

        $this->getLogger()->debug('finished storing remote file into local file');
    }

    /**
     * fetches a remote file, parses it and writes the result into the cache
     *
     * if the local stored information are in the same version as the remote data no actions are
     * taken
     *
     * @param string $remoteFile The code for the remote file to load
     *
     * @throws \BrowscapPHP\Exception\FileNotFoundException
     * @throws \BrowscapPHP\Helper\Exception
     * @throws \BrowscapPHP\Exception\FetcherException
     * @throws \GuzzleHttp\Exception\GuzzleException
     */
    public function update(string $remoteFile = IniLoader::PHP_INI) : void
    {
        $this->getLogger()->debug('started fetching remote file');

        if (null === ($cachedVersion = $this->checkUpdate())) {
            // no newer version available
            return;
        }

        $uri = (new IniLoader())->setRemoteFilename($remoteFile)->getRemoteIniUrl();

        /** @var \Psr\Http\Message\ResponseInterface $response */
        $response = $this->getClient()->request('get', $uri, ['connect_timeout' => $this->connectTimeout]);

        if ($response->getStatusCode() !== 200) {
            throw new FetcherException(
                'an error occured while fetching remote data from URI ' . $uri . ': StatusCode was '
                . $response->getStatusCode()
            );
        }

        try {
            $content = $response->getBody()->getContents();
        } catch (\Exception $e) {
            throw new FetcherException('an error occured while fetching remote data', 0, $e);
        }

        if (empty($content)) {
            $error = error_get_last();

            throw FetcherException::httpError($uri, $error['message'] ?? '');
        }

        $this->getLogger()->debug('finished fetching remote file');

        $converter = new Converter($this->getLogger(), $this->getCache());

        $this->storeContent($converter, $content, $cachedVersion);
    }

    /**
     * checks if an update on a remote location for the local file or the cache
     *
     * @throws \BrowscapPHP\Helper\Exception
     * @throws \BrowscapPHP\Exception\FetcherException
     * @return int|null The actual cached version if a newer version is available, null otherwise
     * @throws \GuzzleHttp\Exception\GuzzleException
     */
    public function checkUpdate() : ?int
    {
        $success = null;
        $cachedVersion = $this->getCache()->getItem('browscap.version', false, $success);

        if (! $cachedVersion) {
            // could not load version from cache
            $this->getLogger()->info('there is no cached version available, please update from remote');

            return 0;
        }

        $uri = (new IniLoader())->getRemoteVersionUrl();

        /** @var \Psr\Http\Message\ResponseInterface $response */
        $response = $this->getClient()->request('get', $uri, ['connect_timeout' => $this->connectTimeout]);

        if ($response->getStatusCode() !== 200) {
            throw new FetcherException(
                'an error occured while fetching version data from URI ' . $uri . ': StatusCode was '
                . $response->getStatusCode()
            );
        }

        try {
            $remoteVersion = $response->getBody()->getContents();
        } catch (\Exception $e) {
            throw new FetcherException(
                'an error occured while fetching version data from URI ' . $uri . ': StatusCode was '
                . $response->getStatusCode(),
                0,
                $e
            );
        }

        if (! $remoteVersion) {
            // could not load remote version
            $this->getLogger()->info('could not load version from remote location');

            return 0;
        }

        if ($cachedVersion && $remoteVersion && $remoteVersion <= $cachedVersion) {
            // no newer version available
            $this->getLogger()->info('there is no newer version available');

            return null;
        }

        $this->getLogger()->info(
            'a newer version is available, local version: ' . $cachedVersion . ', remote version: ' . $remoteVersion
        );

        return (int) $cachedVersion;
    }

    private function sanitizeContent(string $content) : string
    {
        // replace everything between opening and closing php and asp tags
        $content = preg_replace('/<[?%].*[?%]>/', '', $content);

        // replace opening and closing php and asp tags
        return str_replace(['<?', '<%', '?>', '%>'], '', $content);
    }

    /**
     * reads and parses an ini string and writes the results into the cache
     *
     * @param \BrowscapPHP\Helper\Converter $converter
     * @param string                        $content
     * @param int|null                      $cachedVersion
     */
    private function storeContent(Converter $converter, string $content, ?int $cachedVersion)
    {
        $iniString = $this->sanitizeContent($content);
        $iniVersion = $converter->getIniVersion($iniString);

        if (! $cachedVersion || $iniVersion > $cachedVersion) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
            $converter
                ->storeVersion()
                ->convertString($iniString);
        }
    }
}


1		<?php
2		declare(strict_types = 1);
3
4		namespace BrowscapPHP;
5
6		use BrowscapPHP\Cache\BrowscapCache;
7		use BrowscapPHP\Cache\BrowscapCacheInterface;
8		use BrowscapPHP\Exception\FetcherException;
9		use BrowscapPHP\Helper\Converter;
10		use BrowscapPHP\Helper\Filesystem;
11		use BrowscapPHP\Helper\IniLoader;
12		use GuzzleHttp\Client;
13		use GuzzleHttp\ClientInterface;
14		use Psr\Log\LoggerInterface;
15		use Psr\Log\NullLogger;
16		use WurflCache\Adapter\AdapterInterface;
17		use WurflCache\Adapter\File;
18
19		/**
20		* Browscap.ini parsing class with caching and update capabilities
21		*/
22		final class BrowscapUpdater
23		{
24		/**
25		* The cache instance
26		*
27		* @var \BrowscapPHP\Cache\BrowscapCacheInterface\|null
28		*/
29		private $cache;
30
31		/**
32		* @var @var \Psr\Log\LoggerInterface\|null
33		*/
34		private $logger;
35
36		/**
37		* @var \GuzzleHttp\ClientInterface\|null
38		*/
39		private $client;
40
41		/**
42		* Curl connect timeout in seconds
43		*
44		* @var int
45		*/
46		private $connectTimeout = 5;
47
48		/**
49		* Gets a cache instance
50		*
51		* @return \BrowscapPHP\Cache\BrowscapCacheInterface
52		*/
53	14	public function getCache() : BrowscapCacheInterface
54		{
55	14	if (null === $this->cache) {
56	1	$cacheDirectory = __DIR__ . '/../resources/';
57
58	1	$cacheAdapter = new File(
59	1	[File::DIR => $cacheDirectory]
60		);
61
62	1	$this->cache = new BrowscapCache($cacheAdapter);
63		}
64
65	14	return $this->cache;
66		}
67
68		/**
69		* Sets a cache instance
70		*
71		* @param \BrowscapPHP\Cache\BrowscapCacheInterface\|\WurflCache\Adapter\AdapterInterface $cache
72		* @throws \BrowscapPHP\Exception
73		* @return self
74		*/
75	14	public function setCache($cache) : self
76		{
77	14	if ($cache instanceof BrowscapCacheInterface) {
78	10	$this->cache = $cache;
79	4	} elseif ($cache instanceof AdapterInterface) {
80	3	$this->cache = new BrowscapCache($cache);
81		} else {
82	1	throw new Exception(
83		'the cache has to be an instance of \BrowscapPHP\Cache\BrowscapCacheInterface or '
84	1	. 'an instanceof of \WurflCache\Adapter\AdapterInterface',
85	1	Exception::CACHE_INCOMPATIBLE
86		);
87		}
88
89	13	return $this;
90		}
91
92		/**
93		* Sets a logger instance
94		*
95		* @param \Psr\Log\LoggerInterface $logger
96		*
97		* @return self
98		*/
99	10	public function setLogger(LoggerInterface $logger) : self
100		{
101	10	$this->logger = $logger;
102
103	10	return $this;
104		}
105
106		/**
107		* returns a logger instance
108		*
109		* @return \Psr\Log\LoggerInterface
110		*/
111	11	public function getLogger() : LoggerInterface
112		{
113	11	if (null === $this->logger) {
114	3	$this->logger = new NullLogger();
115		}
116
117	11	return $this->logger;
118		}
119
120		/**
121		* Sets the Connection Timeout
122		*
123		* @param int $connectTimeout
124		*/
125	1	public function setConnectTimeout(int $connectTimeout) : void
126		{
127	1	$this->connectTimeout = $connectTimeout;
128	1	}
129
130	10	public function getClient() : ClientInterface
131		{
132	10	if (null === $this->client) {
133	1	$this->client = new Client();
134		}
135
136	10	return $this->client;
137		}
138
139	10	public function setClient(ClientInterface $client)
140		{
141	10	$this->client = $client;
142	10	}
143
144		/**
145		* reads and parses an ini file and writes the results into the cache
146		*
147		* @param string $iniFile
148		* @throws \BrowscapPHP\Exception
149		*/
150	3	public function convertFile(string $iniFile) : void
151		{
152	3	if (empty($iniFile)) {
153	1	throw new Exception('the file name can not be empty');
154		}
155
156	2	if (! is_readable($iniFile)) {
157	1	throw new Exception('it was not possible to read the local file ' . $iniFile);
158		}
159
160		try {
161	1	$iniString = file_get_contents($iniFile);
162		} catch (Helper\Exception $e) {
163		throw new Exception('an error occured while converting the local file into the cache', 0, $e);
164		}
165
166	1	$this->convertString($iniString);
167	1	}
168
169		/**
170		* reads and parses an ini string and writes the results into the cache
171		*
172		* @param string $iniString
173		*/
174	2	public function convertString(string $iniString) : void
175		{
176	2	$cachedVersion = $this->getCache()->getItem('browscap.version', false, $success);
177	2	$converter = new Converter($this->getLogger(), $this->getCache());
178
179	2	$this->storeContent($converter, $iniString, $cachedVersion);
180	2	}
181
182		/**
183		* fetches a remote file and stores it into a local folder
184		*
185		* @param string $file The name of the file where to store the remote content
186		* @param string $remoteFile The code for the remote file to load
187		*
188		* @throws \BrowscapPHP\Exception\FetcherException
189		* @throws \BrowscapPHP\Helper\Exception
190		* @throws \GuzzleHttp\Exception\GuzzleException
191		*/
192	3	public function fetch(string $file, string $remoteFile = IniLoader::PHP_INI) : void
193		{
194	3	if (null === ($cachedVersion = $this->checkUpdate())) {
195		// no newer version available
196		return;
197		}
198
199	2	$this->getLogger()->debug('started fetching remote file');
200
201	2	$uri = (new IniLoader())->setRemoteFilename($remoteFile)->getRemoteIniUrl();
202
203		/** @var \Psr\Http\Message\ResponseInterface $response */
204	2	$response = $this->getClient()->request('get', $uri, ['connect_timeout' => $this->connectTimeout]);
205
206	2	if ($response->getStatusCode() !== 200) {
207		throw new FetcherException(
208		'an error occured while fetching remote data from URI ' . $uri . ': StatusCode was '
209		. $response->getStatusCode()
210		);
211		}
212
213		try {
214	2	$content = $response->getBody()->getContents();
215		} catch (\Exception $e) {
216		throw new FetcherException('an error occured while fetching remote data', 0, $e);
217		}
218
219	2	if (empty($content)) {
220		$error = error_get_last();
221		throw FetcherException::httpError($uri, $error['message']);
222		}
223
224	2	$this->getLogger()->debug('finished fetching remote file');
225	2	$this->getLogger()->debug('started storing remote file into local file');
226
227	2	$content = $this->sanitizeContent($content);
228
229	2	$converter = new Converter($this->getLogger(), $this->getCache());
230	2	$iniVersion = $converter->getIniVersion($content);
231
232	2	if ($iniVersion > $cachedVersion) {
233	2	$fs = new Filesystem();
234	2	$fs->dumpFile($file, $content);
235		}
236
237	2	$this->getLogger()->debug('finished storing remote file into local file');
238	2	}
239
240		/**
241		* fetches a remote file, parses it and writes the result into the cache
242		*
243		* if the local stored information are in the same version as the remote data no actions are
244		* taken
245		*
246		* @param string $remoteFile The code for the remote file to load
247		*
248		* @throws \BrowscapPHP\Exception\FileNotFoundException
249		* @throws \BrowscapPHP\Helper\Exception
250		* @throws \BrowscapPHP\Exception\FetcherException
251		* @throws \GuzzleHttp\Exception\GuzzleException
252		*/
253	2	public function update(string $remoteFile = IniLoader::PHP_INI) : void
254		{
255	2	$this->getLogger()->debug('started fetching remote file');
256
257	2	if (null === ($cachedVersion = $this->checkUpdate())) {
258		// no newer version available
259		return;
260		}
261
262	2	$uri = (new IniLoader())->setRemoteFilename($remoteFile)->getRemoteIniUrl();
263
264		/** @var \Psr\Http\Message\ResponseInterface $response */
265	2	$response = $this->getClient()->request('get', $uri, ['connect_timeout' => $this->connectTimeout]);
266
267	2	if ($response->getStatusCode() !== 200) {
268		throw new FetcherException(
269		'an error occured while fetching remote data from URI ' . $uri . ': StatusCode was '
270		. $response->getStatusCode()
271		);
272		}
273
274		try {
275	2	$content = $response->getBody()->getContents();
276		} catch (\Exception $e) {
277		throw new FetcherException('an error occured while fetching remote data', 0, $e);
278		}
279
280	2	if (empty($content)) {
281	1	$error = error_get_last();
282
283	1	throw FetcherException::httpError($uri, $error['message'] ?? '');
284		}
285
286	1	$this->getLogger()->debug('finished fetching remote file');
287
288	1	$converter = new Converter($this->getLogger(), $this->getCache());
289
290	1	$this->storeContent($converter, $content, $cachedVersion);
291	1	}
292
293		/**
294		* checks if an update on a remote location for the local file or the cache
295		*
296		* @throws \BrowscapPHP\Helper\Exception
297		* @throws \BrowscapPHP\Exception\FetcherException
298		* @return int\|null The actual cached version if a newer version is available, null otherwise
299		* @throws \GuzzleHttp\Exception\GuzzleException
300		*/
301	9	public function checkUpdate() : ?int
302		{
303	9	$success = null;
304	9	$cachedVersion = $this->getCache()->getItem('browscap.version', false, $success);
305
306	9	if (! $cachedVersion) {
307		// could not load version from cache
308	5	$this->getLogger()->info('there is no cached version available, please update from remote');
309
310	5	return 0;
311		}
312
313	4	$uri = (new IniLoader())->getRemoteVersionUrl();
314
315		/** @var \Psr\Http\Message\ResponseInterface $response */
316	4	$response = $this->getClient()->request('get', $uri, ['connect_timeout' => $this->connectTimeout]);
317
318	4	if ($response->getStatusCode() !== 200) {
319	1	throw new FetcherException(
320	1	'an error occured while fetching version data from URI ' . $uri . ': StatusCode was '
321	1	. $response->getStatusCode()
322		);
323		}
324
325		try {
326	3	$remoteVersion = $response->getBody()->getContents();
327	1	} catch (\Exception $e) {
328	1	throw new FetcherException(
329	1	'an error occured while fetching version data from URI ' . $uri . ': StatusCode was '
330	1	. $response->getStatusCode(),
331	1	0,
332	1	$e
333		);
334		}
335
336	2	if (! $remoteVersion) {
337		// could not load remote version
338		$this->getLogger()->info('could not load version from remote location');
339
340		return 0;
341		}
342
343	2	if ($cachedVersion && $remoteVersion && $remoteVersion <= $cachedVersion) {
344		// no newer version available
345	1	$this->getLogger()->info('there is no newer version available');
346
347	1	return null;
348		}
349
350	1	$this->getLogger()->info(
351	1	'a newer version is available, local version: ' . $cachedVersion . ', remote version: ' . $remoteVersion
352		);
353
354	1	return (int) $cachedVersion;
355		}
356
357	5	private function sanitizeContent(string $content) : string
358		{
359		// replace everything between opening and closing php and asp tags
360	5	$content = preg_replace('/<[?%].*[?%]>/', '', $content);
361
362		// replace opening and closing php and asp tags
363	5	return str_replace(['<?', '<%', '?>', '%>'], '', $content);
364		}
365
366		/**
367		* reads and parses an ini string and writes the results into the cache
368		*
369		* @param \BrowscapPHP\Helper\Converter $converter
370		* @param string $content
371		* @param int\|null $cachedVersion
372		*/
373	3	private function storeContent(Converter $converter, string $content, ?int $cachedVersion)
374		{
375	3	$iniString = $this->sanitizeContent($content);
376	3	$iniVersion = $converter->getIniVersion($iniString);
377
378	3	if (! $cachedVersion \|\| $iniVersion > $cachedVersion) {
		0 ignored issues – show Bug Best Practice introduced 2016-05-07 10:33 UTC by Report Bug Copy Issue Report The expression `$cachedVersion` of type `integer\|null` is loosely compared to `false`; this is ambiguous if the integer can be zero. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `integer` values, zero is a special case, in particular the following results might be unexpected: 0 == false // true 0 == null // true 123 == false // false 123 == null // false // It is often better to use strict comparison 0 === false // false 0 === null // false Loading history...
379		$converter
380	3	->storeVersion()
381	3	->convertString($iniString);
382		}
383	3	}
384		}
385

browscap / browscap-php

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BrowscapUpdater B

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