1 | <?php |
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2 | |||
3 | declare(strict_types=1); |
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4 | |||
5 | namespace League\HTMLToMarkdown\Converter; |
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6 | |||
7 | use League\HTMLToMarkdown\Configuration; |
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8 | use League\HTMLToMarkdown\ConfigurationAwareInterface; |
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9 | use League\HTMLToMarkdown\ElementInterface; |
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10 | |||
11 | class LinkConverter implements ConverterInterface, ConfigurationAwareInterface |
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12 | { |
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13 | /** @var Configuration */ |
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14 | protected $config; |
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15 | |||
16 | public function setConfig(Configuration $config): void |
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17 | { |
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18 | $this->config = $config; |
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19 | 99 | } |
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20 | 99 | ||
21 | 99 | public function convert(ElementInterface $element): string |
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22 | { |
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23 | $href = $element->getAttribute('href'); |
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24 | $title = $element->getAttribute('title'); |
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25 | $text = \trim($element->getValue(), "\t\n\r\0\x0B"); |
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26 | |||
27 | if ($title !== '') { |
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28 | 9 | $markdown = '[' . $text . '](' . $href . ' "' . $title . '")'; |
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29 | } elseif ($href === $text && $this->isValidAutolink($href)) { |
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30 | 9 | $markdown = '<' . $href . '>'; |
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31 | 9 | } elseif ($href === 'mailto:' . $text && $this->isValidEmail($text)) { |
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32 | 9 | $markdown = '<' . $text . '>'; |
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33 | } else { |
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34 | 9 | if (\stristr($href, ' ')) { |
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35 | 3 | $href = '<' . $href . '>'; |
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36 | 9 | } |
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37 | 3 | ||
38 | 9 | $markdown = '[' . $text . '](' . $href . ')'; |
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39 | 3 | } |
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40 | 2 | ||
41 | 9 | if (! $href) { |
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42 | if ($this->shouldStrip()) { |
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43 | $markdown = $text; |
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44 | 9 | } else { |
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45 | $markdown = \html_entity_decode($element->getChildrenAsString()); |
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46 | } |
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47 | 9 | } |
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48 | 3 | ||
49 | 3 | return $markdown; |
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50 | 2 | } |
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51 | 3 | ||
52 | /** |
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53 | 2 | * @return string[] |
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54 | */ |
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55 | 9 | public function getSupportedTags(): array |
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56 | { |
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57 | return ['a']; |
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58 | } |
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59 | |||
60 | private function isValidAutolink(string $href): bool |
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61 | 99 | { |
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62 | $useAutolinks = $this->config->getOption('use_autolinks'); |
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63 | 99 | ||
64 | return $useAutolinks && (\preg_match('/^[A-Za-z][A-Za-z0-9.+-]{1,31}:[^<>\x00-\x20]*/i', $href) === 1); |
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65 | } |
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66 | |||
67 | private function isValidEmail(string $email): bool |
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68 | { |
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69 | // Email validation is messy business, but this should cover most cases |
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70 | return \filter_var($email, FILTER_VALIDATE_EMAIL) !== false; |
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71 | 6 | } |
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72 | |||
73 | 6 | private function shouldStrip(): bool |
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74 | 6 | { |
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75 | return \boolval($this->config->getOption('strip_placeholder_links') ?? false); |
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76 | } |
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77 | } |
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78 |