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<?php |
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/** |
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* Created by Gorlum 25.11.2017 18:49 |
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*/ |
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namespace DBAL; |
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use mysqli_result; |
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/** |
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* Class DbSqlPaging |
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* |
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* Another implementation for DbAbstractResultIterator |
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* |
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* Fetches data from string SQL-query and pages through it |
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* |
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* @package DBAL |
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*/ |
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class DbSqlPaging extends DbAbstractResultIterator { |
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protected $db = null; |
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protected $sqlQuery; |
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protected $pageSize = PAGING_PAGE_SIZE_DEFAULT; |
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protected $currentPage = 1; |
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/** |
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* DbSqlPaging constructor. |
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* |
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* @param string $sqlQuery |
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* @param int $pageSize |
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* @param int $currentPage |
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* @param \DBAL\db_mysql|null $db |
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*/ |
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public function __construct($sqlQuery, $pageSize = PAGING_PAGE_SIZE_DEFAULT, $currentPage = 1, $db = null) { |
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$this->sqlQuery = $sqlQuery; |
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$this->pageSize = max(intval($pageSize), PAGING_PAGE_SIZE_MINIMUM); |
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$this->currentPage = max(intval($currentPage), 1); |
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$this->db = isset($db) ? $db : \SN::$gc->db; |
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$this->query(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function valid() { |
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return parent::valid() && $this->counter < $this->getRecordsOnCurrentPage(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function count() { |
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return $this->mysqli_result instanceof mysqli_result ? $this->getRecordsOnCurrentPage() : 0; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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protected function seekToFirst() { |
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if ($this->mysqli_result instanceof mysqli_result) { |
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$this->mysqli_result->data_seek($this->getPageZeroRecordNum()); |
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} |
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} |
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/** |
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* Get current page number |
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* |
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* @return int |
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*/ |
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public function getCurrentPageNumber() { |
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return $this->currentPage; |
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} |
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/** |
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* Get total number of records in query |
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* |
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* @return int |
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*/ |
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public function getTotalRecords() { |
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return $this->mysqli_result instanceof mysqli_result ? $this->mysqli_result->num_rows : 0; |
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} |
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/** |
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* Calculates total page numbers |
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* |
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* @return float|int |
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*/ |
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public function getTotalPages() { |
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return $this->mysqli_result instanceof mysqli_result ? ceil($this->getTotalRecords() / $this->pageSize) : 0; |
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} |
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/** |
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* Calculates record count on current page |
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* |
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* @return int |
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*/ |
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public function getRecordsOnCurrentPage() { |
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return min($this->pageSize, $this->getTotalRecords() - $this->getPageZeroRecordNum()); |
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} |
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/** |
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* Calculates record index from which current page starts |
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* |
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* @return int |
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*/ |
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protected function getPageZeroRecordNum() { |
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return ($this->currentPage - 1) * $this->pageSize; |
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} |
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/** |
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* Queries DB for data and makes all necessary preparations |
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*/ |
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protected function query() { |
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if ($this->mysqli_result !== null) { |
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unset($this->mysqli_result); |
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} |
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// Performing query |
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$this->mysqli_result = $this->db->doquery($this->sqlQuery); |
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// Checking if page number within allowed ranges |
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if ( |
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// Is it not a first page? |
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$this->currentPage != 1 |
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&& |
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// Is current page beyond limits? |
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$this->currentPage > $this->getTotalPages() |
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) { |
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// Correcting page number to first |
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$this->currentPage = max(1, $this->getTotalPages()); |
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} |
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$this->rewind(); |
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} |
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} |
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supernova-ws /
SuperNova
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..