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| 1 | <?php |
| 2 | |
| 3 | namespace CirrusSearch\Dispatch; |
| 4 | |
| 5 | use CirrusSearch\Profile\SearchProfileException; |
| 6 | use CirrusSearch\Search\SearchQuery; |
| 7 | use Wikimedia\Assert\Assert; |
| 8 | |
| 9 | class DefaultSearchQueryDispatchService implements SearchQueryDispatchService { |
| 10 | /** |
| 11 | * List of routes per search engine entry point |
| 12 | * @var SearchQueryRoute[][] indexed by search engine entry point |
| 13 | */ |
| 14 | private $routes; |
| 15 | |
| 16 | /** |
| 17 | * @param SearchQueryRoute[][] $routes |
| 18 | */ |
| 19 | public function __construct( array $routes ) { |
| 20 | $this->routes = $routes; |
| 21 | } |
| 22 | |
| 23 | /** |
| 24 | * @param SearchQuery $query |
| 25 | * @return SearchQueryRoute |
| 26 | */ |
| 27 | public function bestRoute( SearchQuery $query ): SearchQueryRoute { |
| 28 | Assert::parameter( isset( $this->routes[$query->getSearchEngineEntryPoint()] ), 'query', |
| 29 | "Unsupported search engine entry point {$query->getSearchEngineEntryPoint()}" ); |
| 30 | |
| 31 | $routes = $this->routes[$query->getSearchEngineEntryPoint()]; |
| 32 | |
| 33 | $bestScore = 0.0; |
| 34 | |
| 35 | /** @var SearchQueryRoute $best */ |
| 36 | $best = null; |
| 37 | foreach ( $routes as $route ) { |
| 38 | $score = $route->score( $query ); |
| 39 | Assert::postcondition( $score >= 0 && $score <= 1.0, "SearchQueryRoute scores must be between 0.0 and 1.0" ); |
| 40 | if ( $score === 0.0 ) { |
| 41 | continue; |
| 42 | } |
| 43 | if ( $score === 1.0 ) { |
| 44 | if ( $bestScore === 1.0 ) { |
| 45 | throw new SearchProfileException( "Two competing contexts " . |
| 46 | // @phan-suppress-next-line PhanNonClassMethodCall $best always set when reaching this line |
| 47 | "{$route->getProfileContext()} and {$best->getProfileContext()} " . |
| 48 | " produced the max score" ); |
| 49 | } |
| 50 | $bestScore = $score; |
| 51 | $best = $route; |
| 52 | } elseif ( $score > $bestScore ) { |
| 53 | $best = $route; |
| 54 | $bestScore = $score; |
| 55 | } |
| 56 | } |
| 57 | Assert::postcondition( $best !== null, |
| 58 | "No route to backend, make sure a default SearchQueryRoute is added for {$query->getSearchEngineEntryPoint()}" ); |
| 59 | return $best; |
| 60 | } |
| 61 | } |