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<?php |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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/** |
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* Matching engine that delegates to SpellChecker::getPermalinkUsingSpelling(). |
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* |
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* Uses Levenshtein distance / N-gram filtering to find the closest matching |
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* published page. Expensive, so shouldRun() filters out URL shapes that are |
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* unlikely to be useful typo corrections. |
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*/ |
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class ABJ_404_Solution_SpellingMatchingEngine implements ABJ_404_Solution_MatchingEngine { |
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|
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/** @var ABJ_404_Solution_SpellChecker */ |
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private $spellChecker; |
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|
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/** |
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* @param ABJ_404_Solution_SpellChecker $spellChecker |
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*/ |
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public function __construct(ABJ_404_Solution_SpellChecker $spellChecker) { |
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$this->spellChecker = $spellChecker; |
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} |
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|
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/** @return string */ |
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public function getName(): string { |
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return __('spell check', '404-solution'); |
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} |
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|
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/** @param ABJ_404_Solution_MatchRequest $request */ |
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public function shouldRun(ABJ_404_Solution_MatchRequest $request): bool { |
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$urlSlugOnly = $request->getUrlSlugOnly(); |
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|
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if ($urlSlugOnly === '') { |
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return false; |
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} |
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|
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$segments = array_values(array_filter(explode('/', $urlSlugOnly))); |
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if (count($segments) === 0) { |
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return false; |
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} |
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|
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$lastSegment = (string)end($segments); |
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|
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if (strlen($lastSegment) > 80) { |
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return false; |
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} |
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if (substr_count($lastSegment, '-') >= 6) { |
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return false; |
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} |
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if (preg_match('/\d{4,}/', $lastSegment)) { |
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return false; |
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} |
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if (!preg_match('/[a-zA-Z]/', $lastSegment)) { |
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return false; |
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} |
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|
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return true; |
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} |
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|
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/** @param ABJ_404_Solution_MatchRequest $request */ |
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public function match(ABJ_404_Solution_MatchRequest $request): ?ABJ_404_Solution_MatchResult { |
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$permalink = $this->spellChecker->getPermalinkUsingSpelling( |
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$request->getUrlSlugOnly(), |
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$request->getRequestedURL(), |
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$request->getOptions() |
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); |
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|
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if (empty($permalink)) { |
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return null; |
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} |
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|
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$id = isset($permalink['id']) && is_scalar($permalink['id']) ? (string)$permalink['id'] : ''; |
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$type = isset($permalink['type']) && is_scalar($permalink['type']) ? (string)$permalink['type'] : ''; |
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$link = isset($permalink['link']) && is_string($permalink['link']) ? $permalink['link'] : ''; |
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$title = isset($permalink['title']) && is_string($permalink['title']) ? $permalink['title'] : ''; |
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$score = isset($permalink['score']) && is_scalar($permalink['score']) ? (float)$permalink['score'] : 0.0; |
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|
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return new ABJ_404_Solution_MatchResult($id, $type, $link, $title, $score, $this->getName()); |
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} |
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} |
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|
