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1 | <?php |
2 | |
3 | declare(strict_types=1); |
4 | |
5 | namespace Drupal\visitors\Service; |
6 | |
7 | use Drupal\Core\Config\ConfigFactoryInterface; |
8 | use Drupal\visitors\VisitorsSpamInterface; |
9 | |
10 | /** |
11 | * Service for detecting spam referrers. |
12 | */ |
13 | final class SpamService implements VisitorsSpamInterface { |
14 | |
15 | /** |
16 | * The spam sites. |
17 | * |
18 | * @var array |
19 | */ |
20 | private array $spamSites; |
21 | |
22 | /** |
23 | * Constructs a new SpamService. |
24 | * |
25 | * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory |
26 | * The configuration factory. |
27 | */ |
28 | public function __construct(ConfigFactoryInterface $config_factory) { |
29 | $this->spamSites = $config_factory->get('visitors.spam')->get('sites') ?? []; |
30 | } |
31 | |
32 | /** |
33 | * {@inheritdoc} |
34 | */ |
35 | public function match(string $host): bool { |
36 | |
37 | // Check if domain matches any spam site. |
38 | foreach ($this->spamSites as $spam_site) { |
39 | if ($this->isDomainMatch($host, $spam_site)) { |
40 | return TRUE; |
41 | } |
42 | } |
43 | |
44 | return FALSE; |
45 | } |
46 | |
47 | /** |
48 | * Checks if a domain matches a spam site pattern. |
49 | * |
50 | * @param string $domain |
51 | * The normalized domain to check. |
52 | * @param string $spam_site |
53 | * The spam site pattern to match against. |
54 | * |
55 | * @return bool |
56 | * TRUE if the domain matches the spam site pattern. |
57 | */ |
58 | private function isDomainMatch(string $domain, string $spam_site): bool { |
59 | $domain = strtolower(trim($domain)); |
60 | $spam_site = strtolower(trim($spam_site)); |
61 | |
62 | // Exact match. |
63 | if ($domain === $spam_site || str_ends_with($domain, '.' . $spam_site)) { |
64 | return TRUE; |
65 | } |
66 | |
67 | return FALSE; |
68 | } |
69 | |
70 | } |