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<?php
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namespace Radowoj\Searcher\SearchProvider;
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use stdClass;
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use Exception;
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use GuzzleHttp\Client as GuzzleClient;
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use Radowoj\Searcher\SearchResult\Collection;
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use Radowoj\Searcher\SearchResult\ICollection;
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use Radowoj\Searcher\SearchResult\Item;
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class Google extends SearchProvider implements ISearchProvider
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{
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const URI = 'https://www.googleapis.com/customsearch/v1?';
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protected $apiKey = null;
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protected $cx = null;
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protected $guzzle = null;
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public function __construct(GuzzleClient $guzzle, string $apiKey, string $cx)
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{
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$this->apiKey = $apiKey;
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$this->cx = $cx;
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$this->guzzle = $guzzle;
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}
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protected function getSearchQueryString(string $query, int $limit, int $offset)
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{
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$params = [
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'key' => $this->apiKey,
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'q' => urlencode($query),
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'cx' => $this->cx,
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];
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if ($offset) {
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$params['start'] = $offset;
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}
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$paramsMerged = [];
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foreach($params as $key => $value) {
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$paramsMerged[] = "{$key}={$value}";
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}
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return implode('&', $paramsMerged);
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}
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protected function searchRequest(string $query, int $limit, int $offset) : stdClass
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{
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$uri = self::URI . $this->getSearchQueryString($query, $limit, $offset);
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$result = $this->guzzle->request('GET', $uri);
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return json_decode($result->getBody());
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}
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protected function enforceLimit(stdClass $result, int $limit) : stdClass
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{
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if (!isset($result->items)) {
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return $result;
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}
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$result->items = array_slice($result->items, 0, $limit);
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return $result;
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}
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protected function validateRequestResult(stdClass $result)
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{
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if (!isset($result->kind) || $result->kind !== "customsearch#search") {
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throw new Exception("Invalid Google API response: " . print_r($result, 1));
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}
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}
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protected function extractResults(stdClass $result) : array
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{
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return isset($result->items)
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? $result->items
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: [];
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}
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protected function extractTotalMatches(stdClass $result) : int
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{
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return isset($result->searchInformation->totalResults)
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? $result->searchInformation->totalResults
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: 0;
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}
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protected function populateCollection(stdClass $result) : ICollection
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{
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$results = array_map(function($item) {
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return new Item([
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'url' => $item->link,
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'title' => $item->title,
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'description' => $item->snippet,
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]);
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}, $this->extractResults($result));
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return new Collection(
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$results,
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$this->extractTotalMatches($result)
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);
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return new Collection();
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}
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}
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radowoj /
searcher
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.