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<?php |
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namespace seregazhuk\PinterestBot\Helpers; |
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use seregazhuk\PinterestBot\Api\Providers\Provider; |
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class Pagination |
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{ |
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/** |
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* @var Provider |
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*/ |
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private $provider; |
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/** |
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* @var array |
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*/ |
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protected $bookmarks = []; |
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public function __construct(Provider $provider) |
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{ |
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$this->provider = $provider; |
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} |
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/** |
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* Iterate through results of Api function call. By |
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* default generator will return all pagination results. |
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* To limit result batches, set $limit. Call function |
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* of object to get data. |
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* |
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* @param string $method |
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* @param array $params |
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* @param int $limit |
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* @return \Iterator |
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*/ |
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public function paginateOver($method, $params, $limit = 0) |
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{ |
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$resultsNum = 0; |
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while (true) { |
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$results = $this->callProviderRequest($method, $params); |
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if (empty($results) || $this->checkEndBookMarks()) { |
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return; |
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} |
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foreach ($results as $result) { |
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$resultsNum++; |
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yield $result; |
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if ($this->reachesLimit($limit, $resultsNum)) { |
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return; |
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} |
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} |
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} |
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} |
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protected function callProviderRequest($method, array $params) |
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{ |
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$params['bookmarks'] = $this->bookmarks; |
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$response = call_user_func_array([$this->provider, $method], $params); |
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if ($this->responseHasData($response)) { |
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$this->getBookMarks($response); |
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return $this->getDataFromPaginatedResponse($response); |
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} |
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return []; |
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} |
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protected function getDataFromPaginatedResponse($response) |
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{ |
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if ($this->responseHasData($response)) { |
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$res = $this->clearResponseFromMetaData($response); |
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return $res['data']; |
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} |
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return []; |
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} |
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/** |
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* @param array $response |
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* |
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* @return bool |
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*/ |
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protected function responseHasData($response) |
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{ |
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return isset($response['data']) && !empty($response['data']); |
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} |
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/** |
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* Check if we get batches limit in pagination. |
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* |
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* @param int $limit |
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* @param int $resultsNum |
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* |
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* @return bool |
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*/ |
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protected function reachesLimit($limit, $resultsNum) |
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{ |
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return $limit && $resultsNum >= $limit; |
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} |
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/** |
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* Remove 'module' data from response. |
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* |
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* @param array $response |
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* |
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* @return array mixed |
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*/ |
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protected function clearResponseFromMetaData($response) |
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{ |
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if (isset($response['data'][0]['type']) && $response['data'][0]['type'] == 'module') { |
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array_shift($response['data']); |
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} |
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return $response; |
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} |
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/** |
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* @param $response |
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* |
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* @return array |
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*/ |
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protected function getBookMarks($response) |
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{ |
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$this->bookmarks = isset($response['bookmarks']) ? $response['bookmarks'] : []; |
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return $this; |
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} |
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protected function checkEndBookMarks() |
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{ |
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return !empty($this->bookmarks) && $this->bookmarks[0] == '-end-'; |
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} |
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} |
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seregazhuk /
php-pinterest-bot
