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<?php |
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namespace seregazhuk\PinterestBot\Helpers; |
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class Pagination |
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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 $batchesLimit. Call function |
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* of object to get data. |
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* |
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* @param callable $callback |
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* @param array $params |
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* @param int $batchesLimit |
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* @return \Iterator |
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*/ |
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public static function getPaginatedData($callback, $params, $batchesLimit = 0) |
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{ |
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$batchesNum = 0; |
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do { |
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$response = self::getPaginatedResponse($callback, $params); |
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$items = self::getDataFromPaginatedResponse($response); |
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if (empty($items)) { |
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return; |
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} |
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$batchesNum++; |
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yield $items; |
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$params['bookmarks'] = self::getBookMarks($response); |
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if (self::checkEndBookMarks($params['bookmarks'])) { |
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return; |
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} |
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} while ( ! self::reachBatchesLimit($batchesLimit, $batchesNum)); |
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} |
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protected static function getPaginatedResponse(callable $callback, array $params) |
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{ |
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$response = call_user_func_array($callback, $params); |
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if (self::responseHasData($response)) { |
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return self::clearResponseFromMetaData($response); |
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} |
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return []; |
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} |
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protected static function getDataFromPaginatedResponse($response) |
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{ |
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if (self::responseHasData($response)) { |
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$res = self::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 $res |
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* @return bool |
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*/ |
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protected static function responseHasData($res) |
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{ |
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return isset($res['data']) && ! empty($res['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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* @param int $batchesLimit |
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* @param int $batchesNum |
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* @return bool |
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*/ |
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protected static function reachBatchesLimit($batchesLimit, $batchesNum) |
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{ |
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return $batchesLimit && $batchesNum >= $batchesLimit; |
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} |
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/** |
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* Remove 'module' data from response |
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* @param array $res |
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* @return array mixed |
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*/ |
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protected static function clearResponseFromMetaData($res) |
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{ |
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if (isset($res['data'][0]['type']) && $res['data'][0]['type'] == 'module') { |
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array_shift($res['data']); |
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} |
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return $res; |
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} |
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/** |
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* @param $response |
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* @return array |
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*/ |
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protected static function getBookMarks($response) |
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{ |
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return isset($response['bookmarks']) ? $response['bookmarks'] : []; |
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} |
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protected static function checkEndBookMarks($bookmarks) |
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{ |
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return ! empty($bookmarks) && $bookmarks[0] == '-end-'; |
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} |
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} |
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seregazhuk /
php-pinterest-bot
