Crawler::addToDepthTree() - Code Metrics - Inspection of "Code refactor" - spatie/crawler - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#150)

by Brent

created 2018-05-15 09:27 UTC

Crawler::addToDepthTree() B

↳ Parent: Crawler

Complexity

Conditions	4
Paths	4

Size

Total Lines	24
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
c	0
b	0
f	0
dl	0
loc	24
rs	8.6845
cc	4
eloc	12
nc	4
nop	3

<?php

namespace Spatie\Crawler;

use Generator;
use Tree\Node\Node;
use GuzzleHttp\Pool;
use GuzzleHttp\Client;
use GuzzleHttp\Psr7\Uri;
use GuzzleHttp\Psr7\Request;
use Spatie\Robots\RobotsTxt;
use GuzzleHttp\RequestOptions;
use Psr\Http\Message\UriInterface;
use Spatie\Browsershot\Browsershot;
use Spatie\Crawler\Handlers\CrawlRequestFailed;
use Spatie\Crawler\Handlers\CrawlRequestFulfilled;
use Spatie\Crawler\CrawlQueue\CollectionCrawlQueue;

class Crawler
{
    use CrawlerProperties;

    /** @var \GuzzleHttp\Client */
    protected $client;

    /** @var \Psr\Http\Message\UriInterface */
    protected $baseUrl;

    /** @var array[\Spatie\Crawler\CrawlObserver] */
    protected $crawlObservers;

    /** @var \Spatie\Crawler\CrawlProfile */
    protected $crawlProfile;

    /** @var int */
    protected $concurrency;

    /** @var \Spatie\Crawler\CrawlQueue\CrawlQueue */
    protected $crawlQueue;

    /** @var int */
    protected $crawledUrlCount = 0;

    /** @var int|null */
    protected $maximumCrawlCount = null;

    /** @var int */
    protected $maximumResponseSize = 1024 * 1024 * 2;

    /** @var int|null */
    protected $maximumDepth = null;

    /** @var bool */
    protected $respectRobots = true;

    /** @var \Tree\Node\Node */
    protected $depthTree;

    /** @var bool */
    protected $executeJavaScript = false;

    /** @var Browsershot */
    protected $browsershot = null;

    /** @var \Spatie\Robots\RobotsTxt */
    protected $robotsTxt = null;

    protected static $defaultClientOptions = [
        RequestOptions::COOKIES => true,
        RequestOptions::CONNECT_TIMEOUT => 10,
        RequestOptions::TIMEOUT => 10,
        RequestOptions::ALLOW_REDIRECTS => false,
    ];

    /**
     * @param array $clientOptions
     *
     * @return static
     */
    public static function create(array $clientOptions = [])
    {
        $clientOptions = (count($clientOptions))
            ? $clientOptions
            : self::$defaultClientOptions;

        $client = new Client($clientOptions);

        return new static($client);
    }

    public function __construct(Client $client, int $concurrency = 10)
    {
        $this->client = $client;

        $this->concurrency = $concurrency;

        $this->crawlProfile = new CrawlAllUrls();

        $this->crawlQueue = new CollectionCrawlQueue();
    }

    /**
     * @param \Psr\Http\Message\UriInterface|string $baseUrl
     */
    public function startCrawling($baseUrl)
    {
        if (! $baseUrl instanceof UriInterface) {
            $baseUrl = new Uri($baseUrl);
        }

        if ($baseUrl->getScheme() === '') {
            $baseUrl = $baseUrl->withScheme('http');
        }

        if ($baseUrl->getPath() === '') {
            $baseUrl = $baseUrl->withPath('/');
        }

        $this->baseUrl = $baseUrl;

        $crawlUrl = CrawlUrl::create($this->baseUrl);

        $this->robotsTxt = $this->createRobotsTxt($crawlUrl->url);

        if ($this->robotsTxt->allows((string) $crawlUrl->url)) {
            $this->addToCrawlQueue($crawlUrl);
        }

        $this->depthTree = new Node((string) $this->baseUrl);

        $this->startCrawlingQueue();

        foreach ($this->crawlObservers as $crawlObserver) {
            $crawlObserver->finishedCrawling();
        }
    }

    public function addToDepthTree(UriInterface $url, UriInterface $parentUrl, Node $node = null): ?Node
    {
        $node = $node ?? $this->depthTree;

        $returnNode = null;

        if ($node->getValue() === (string) $parentUrl) {
            $newNode = new Node((string) $url);

            $node->addChild($newNode);

            return $newNode;
        }

        foreach ($node->getChildren() as $currentNode) {
            $returnNode = $this->addToDepthTree($url, $parentUrl, $currentNode);

            if (! is_null($returnNode)) {
                break;
            }
        }

        return $returnNode;
    }

    protected function startCrawlingQueue()
    {
        while ($this->crawlQueue->hasPendingUrls()) {
            $pool = new Pool($this->client, $this->getCrawlRequests(), [
                'concurrency' => $this->concurrency,
                'options' => $this->client->getConfig(),
                'fulfilled' => new CrawlRequestFulfilled($this),
                'rejected' => new CrawlRequestFailed($this),
            ]);

            $promise = $pool->promise();

            $promise->wait();
        }
    }

    public function endsWith($haystack, $needle)
    {
        return strrpos($haystack, $needle) + strlen($needle) ===
            strlen($haystack);
    }

    protected function createRobotsTxt(UriInterface $uri): RobotsTxt
    {
        return RobotsTxt::create($uri->withPath('/robots.txt'));
    }

    protected function getCrawlRequests(): Generator
    {
        while ($crawlUrl = $this->crawlQueue->getFirstPendingUrl()) {
            if (! $this->crawlProfile->shouldCrawl($crawlUrl->url)) {
                $this->crawlQueue->markAsProcessed($crawlUrl);
                continue;
            }

            if ($this->crawlQueue->hasAlreadyBeenProcessed($crawlUrl)) {
                continue;
            }

            foreach ($this->crawlObservers as $crawlObserver) {
                $crawlObserver->willCrawl($crawlUrl->url);
            }

            $this->crawlQueue->markAsProcessed($crawlUrl);

            yield $crawlUrl->getId() => new Request('GET', $crawlUrl->url);
        }
    }

    public function addToCrawlQueue(CrawlUrl $crawlUrl): self
    {
        if (! $this->getCrawlProfile()->shouldCrawl($crawlUrl->url)) {
            return $this;
        }

        if ($this->getCrawlQueue()->has($crawlUrl->url)) {
            return $this;
        }

        $this->crawledUrlCount++;

        $this->crawlQueue->add($crawlUrl);

        return $this;
    }

    public function maximumCrawlCountReached(): bool
    {
        $maximumCrawlCount = $this->getMaximumCrawlCount();

        if (is_null($maximumCrawlCount)) {
            return false;
        }

        return $this->getCrawlerUrlCount() >= $maximumCrawlCount;
    }
}


1			<?php
2
3			namespace Spatie\Crawler;
4
5			use Generator;
6			use Tree\Node\Node;
7			use GuzzleHttp\Pool;
8			use GuzzleHttp\Client;
9			use GuzzleHttp\Psr7\Uri;
10			use GuzzleHttp\Psr7\Request;
11			use Spatie\Robots\RobotsTxt;
12			use GuzzleHttp\RequestOptions;
13			use Psr\Http\Message\UriInterface;
14			use Spatie\Browsershot\Browsershot;
15			use Spatie\Crawler\Handlers\CrawlRequestFailed;
16			use Spatie\Crawler\Handlers\CrawlRequestFulfilled;
17			use Spatie\Crawler\CrawlQueue\CollectionCrawlQueue;
18
19			class Crawler
20			{
21			use CrawlerProperties;
22
23			/** @var \GuzzleHttp\Client */
24			protected $client;
25
26			/** @var \Psr\Http\Message\UriInterface */
27			protected $baseUrl;
28
29			/** @var array[\Spatie\Crawler\CrawlObserver] */
30			protected $crawlObservers;
31
32			/** @var \Spatie\Crawler\CrawlProfile */
33			protected $crawlProfile;
34
35			/** @var int */
36			protected $concurrency;
37
38			/** @var \Spatie\Crawler\CrawlQueue\CrawlQueue */
39			protected $crawlQueue;
40
41			/** @var int */
42			protected $crawledUrlCount = 0;
43
44			/** @var int\|null */
45			protected $maximumCrawlCount = null;
46
47			/** @var int */
48			protected $maximumResponseSize = 1024 * 1024 * 2;
49
50			/** @var int\|null */
51			protected $maximumDepth = null;
52
53			/** @var bool */
54			protected $respectRobots = true;
55
56			/** @var \Tree\Node\Node */
57			protected $depthTree;
58
59			/** @var bool */
60			protected $executeJavaScript = false;
61
62			/** @var Browsershot */
63			protected $browsershot = null;
64
65			/** @var \Spatie\Robots\RobotsTxt */
66			protected $robotsTxt = null;
67
68			protected static $defaultClientOptions = [
69			RequestOptions::COOKIES => true,
70			RequestOptions::CONNECT_TIMEOUT => 10,
71			RequestOptions::TIMEOUT => 10,
72			RequestOptions::ALLOW_REDIRECTS => false,
73			];
74
75			/**
76			* @param array $clientOptions
77			*
78			* @return static
79			*/
80			public static function create(array $clientOptions = [])
81			{
82			$clientOptions = (count($clientOptions))
83			? $clientOptions
84			: self::$defaultClientOptions;
85
86			$client = new Client($clientOptions);
87
88			return new static($client);
89			}
90
91			public function __construct(Client $client, int $concurrency = 10)
92			{
93			$this->client = $client;
94
95			$this->concurrency = $concurrency;
96
97			$this->crawlProfile = new CrawlAllUrls();
98
99			$this->crawlQueue = new CollectionCrawlQueue();
100			}
101
102			/**
103			* @param \Psr\Http\Message\UriInterface\|string $baseUrl
104			*/
105			public function startCrawling($baseUrl)
106			{
107			if (! $baseUrl instanceof UriInterface) {
108			$baseUrl = new Uri($baseUrl);
109			}
110
111			if ($baseUrl->getScheme() === '') {
112			$baseUrl = $baseUrl->withScheme('http');
113			}
114
115			if ($baseUrl->getPath() === '') {
116			$baseUrl = $baseUrl->withPath('/');
117			}
118
119			$this->baseUrl = $baseUrl;
120
121			$crawlUrl = CrawlUrl::create($this->baseUrl);
122
123			$this->robotsTxt = $this->createRobotsTxt($crawlUrl->url);
124
125			if ($this->robotsTxt->allows((string) $crawlUrl->url)) {
126			$this->addToCrawlQueue($crawlUrl);
127			}
128
129			$this->depthTree = new Node((string) $this->baseUrl);
130
131			$this->startCrawlingQueue();
132
133			foreach ($this->crawlObservers as $crawlObserver) {
134			$crawlObserver->finishedCrawling();
135			}
136			}
137
138			public function addToDepthTree(UriInterface $url, UriInterface $parentUrl, Node $node = null): ?Node
139			{
140			$node = $node ?? $this->depthTree;
141
142			$returnNode = null;
143
144			if ($node->getValue() === (string) $parentUrl) {
145			$newNode = new Node((string) $url);
146
147			$node->addChild($newNode);
148
149			return $newNode;
150			}
151
152			foreach ($node->getChildren() as $currentNode) {
153			$returnNode = $this->addToDepthTree($url, $parentUrl, $currentNode);
154
155			if (! is_null($returnNode)) {
156			break;
157			}
158			}
159
160			return $returnNode;
161			}
162
163			protected function startCrawlingQueue()
164			{
165			while ($this->crawlQueue->hasPendingUrls()) {
166			$pool = new Pool($this->client, $this->getCrawlRequests(), [
167			'concurrency' => $this->concurrency,
168			'options' => $this->client->getConfig(),
169			'fulfilled' => new CrawlRequestFulfilled($this),
170			'rejected' => new CrawlRequestFailed($this),
171			]);
172
173			$promise = $pool->promise();
174
175			$promise->wait();
176			}
177			}
178
179			public function endsWith($haystack, $needle)
180			{
181			return strrpos($haystack, $needle) + strlen($needle) ===
182			strlen($haystack);
183			}
184
185			protected function createRobotsTxt(UriInterface $uri): RobotsTxt
186			{
187			return RobotsTxt::create($uri->withPath('/robots.txt'));
188			}
189
190			protected function getCrawlRequests(): Generator
191			{
192			while ($crawlUrl = $this->crawlQueue->getFirstPendingUrl()) {
193			if (! $this->crawlProfile->shouldCrawl($crawlUrl->url)) {
194			$this->crawlQueue->markAsProcessed($crawlUrl);
195			continue;
196			}
197
198			if ($this->crawlQueue->hasAlreadyBeenProcessed($crawlUrl)) {
199			continue;
200			}
201
202			foreach ($this->crawlObservers as $crawlObserver) {
203			$crawlObserver->willCrawl($crawlUrl->url);
204			}
205
206			$this->crawlQueue->markAsProcessed($crawlUrl);
207
208			yield $crawlUrl->getId() => new Request('GET', $crawlUrl->url);
209			}
210			}
211
212			public function addToCrawlQueue(CrawlUrl $crawlUrl): self
213			{
214			if (! $this->getCrawlProfile()->shouldCrawl($crawlUrl->url)) {
215			return $this;
216			}
217
218			if ($this->getCrawlQueue()->has($crawlUrl->url)) {
219			return $this;
220			}
221
222			$this->crawledUrlCount++;
223
224			$this->crawlQueue->add($crawlUrl);
225
226			return $this;
227			}
228
229			public function maximumCrawlCountReached(): bool
230			{
231			$maximumCrawlCount = $this->getMaximumCrawlCount();
232
233			if (is_null($maximumCrawlCount)) {
234			return false;
235			}
236
237			return $this->getCrawlerUrlCount() >= $maximumCrawlCount;
238			}
239			}
240

spatie / crawler

Pull Request — master (#150)

Crawler::addToDepthTree() B

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

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