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<?php
namespace Pagerfanta;
use Pagerfanta\Adapter\AdapterInterface;
use Pagerfanta\Exception\LessThan1CurrentPageException;
use Pagerfanta\Exception\LessThan1MaxPerPageException;
use Pagerfanta\Exception\LogicException;
use Pagerfanta\Exception\NotBooleanException;
use Pagerfanta\Exception\NotIntegerCurrentPageException;
use Pagerfanta\Exception\NotIntegerException;
use Pagerfanta\Exception\NotIntegerMaxPerPageException;
use Pagerfanta\Exception\OutOfBoundsException;
use Pagerfanta\Exception\OutOfRangeCurrentPageException;
class Pagerfanta implements \Countable, \IteratorAggregate, \JsonSerializable, PagerfantaInterface
{
/**
* @var AdapterInterface
*/
private $adapter;
/**
* @var bool
*/
private $allowOutOfRangePages = false;
/**
* @var bool
*/
private $normalizeOutOfRangePages = false;
/**
* @var int
*/
private $maxPerPage = 10;
/**
* @var int
*/
private $currentPage = 1;
/**
* @var int|null
*/
private $nbResults;
/**
* @var iterable|null
*/
private $currentPageResults;
public function __construct(AdapterInterface $adapter)
{
$this->adapter = $adapter;
}
/**
* @return AdapterInterface
*/
public function getAdapter()
{
return $this->adapter;
}
/**
* @param bool $allowOutOfRangePages
*
* @return $this
*
* @throws NotBooleanException if the value is not boolean
*/
public function setAllowOutOfRangePages($allowOutOfRangePages)
{
$this->allowOutOfRangePages = $this->filterBoolean($allowOutOfRangePages);
return $this;
}
/**
* @return bool
*/
public function getAllowOutOfRangePages()
{
return $this->allowOutOfRangePages;
}
/**
* @param bool $normalizeOutOfRangePages
*
* @return $this
*
* @throws NotBooleanException if the value is not boolean
*/
public function setNormalizeOutOfRangePages($normalizeOutOfRangePages)
{
$this->normalizeOutOfRangePages = $this->filterBoolean($normalizeOutOfRangePages);
return $this;
}
/**
* @return bool
*/
public function getNormalizeOutOfRangePages()
{
return $this->normalizeOutOfRangePages;
}
/**
* @throws NotBooleanException if the value is not boolean
*/
private function filterBoolean($value): bool
{
if (!\is_bool($value)) {
throw new NotBooleanException();
}
return $value;
}
/**
* Sets the maximum number of items per page.
*
* Tries to convert from string and float.
*
* @param int $maxPerPage
*
* @return $this
*
* @throws NotIntegerMaxPerPageException if the max per page is not an integer even converting
* @throws LessThan1MaxPerPageException if the max per page is less than 1
*/
public function setMaxPerPage($maxPerPage)
{
$this->maxPerPage = $this->filterMaxPerPage($maxPerPage);
$this->resetForMaxPerPageChange();
return $this;
}
private function filterMaxPerPage($maxPerPage): int
{
$maxPerPage = $this->toInteger($maxPerPage);
$this->checkMaxPerPage($maxPerPage);
return $maxPerPage;
}
/**
* @throws NotIntegerMaxPerPageException if the max per page is not an integer even converting
* @throws LessThan1MaxPerPageException if the max per page is less than 1
*/
private function checkMaxPerPage($maxPerPage): void
{
if (!\is_int($maxPerPage)) {
throw new NotIntegerMaxPerPageException();
}
if ($maxPerPage < 1) {
throw new LessThan1MaxPerPageException();
}
}
private function resetForMaxPerPageChange(): void
{
$this->currentPageResults = null;
$this->nbResults = null;
}
/**
* @return int
*/
public function getMaxPerPage()
{
return $this->maxPerPage;
}
/**
* Sets the current page.
*
* Tries to convert from string and float.
*
* @param int $currentPage
*
* @return $this
*
* @throws NotIntegerCurrentPageException if the current page is not an integer even converting
* @throws LessThan1CurrentPageException if the current page is less than 1
* @throws OutOfRangeCurrentPageException if It is not allowed out of range pages and they are not normalized
*/
public function setCurrentPage($currentPage)
{
if (\count(\func_get_args()) > 1) {
$this->useDeprecatedCurrentPageBooleanArguments(\func_get_args());
}
$this->currentPage = $this->filterCurrentPage($currentPage);
$this->resetForCurrentPageChange();
return $this;
}
private function useDeprecatedCurrentPageBooleanArguments(array $arguments): void
{
$this->useDeprecatedCurrentPageAllowOutOfRangePagesBooleanArgument($arguments);
$this->useDeprecatedCurrentPageNormalizeOutOfRangePagesBooleanArgument($arguments);
}
private function useDeprecatedCurrentPageAllowOutOfRangePagesBooleanArgument(array $arguments): void
{
$this->useDeprecatedBooleanArgument($arguments, 1, 'setAllowOutOfRangePages', '$allowOutOfRangePages');
}
private function useDeprecatedCurrentPageNormalizeOutOfRangePagesBooleanArgument(array $arguments): void
{
$this->useDeprecatedBooleanArgument($arguments, 2, 'setNormalizeOutOfRangePages', '$normalizeOutOfRangePages');
}
private function useDeprecatedBooleanArgument(array $arguments, int $index, string $method, string $oldArgument): void
{
if (isset($arguments[$index])) {
trigger_deprecation(
'babdev/pagerfanta',
'2.2',
'The %1$s argument of %2$s::setCurrentPage() is deprecated and will no longer be supported in 3.0. Use the %2$s::%3$s() method instead.',
$oldArgument,
self::class,
self::class,
$method
);
$this->$method($arguments[$index]);
}
}
private function filterCurrentPage($currentPage): int
{
$currentPage = $this->toInteger($currentPage);
$this->checkCurrentPage($currentPage);
$currentPage = $this->filterOutOfRangeCurrentPage($currentPage);
return $currentPage;
}
/**
* @throws NotIntegerCurrentPageException if the current page is not an integer even converting
* @throws LessThan1CurrentPageException if the current page is less than 1
*/
private function checkCurrentPage($currentPage): void
{
if (!\is_int($currentPage)) {
throw new NotIntegerCurrentPageException();
}
if ($currentPage < 1) {
throw new LessThan1CurrentPageException();
}
}
private function filterOutOfRangeCurrentPage($currentPage): int
{
if ($this->notAllowedCurrentPageOutOfRange($currentPage)) {
return $this->normalizeOutOfRangeCurrentPage($currentPage);
}
return $currentPage;
}
private function notAllowedCurrentPageOutOfRange(int $currentPage): bool
{
return !$this->getAllowOutOfRangePages() && $this->currentPageOutOfRange($currentPage);
}
private function currentPageOutOfRange(int $currentPage): bool
{
return $currentPage > 1 && $currentPage > $this->getNbPages();
}
/**
* @param int $currentPage
*
* @throws OutOfRangeCurrentPageException if the page should not be normalized
*/
private function normalizeOutOfRangeCurrentPage($currentPage): int
{
if ($this->getNormalizeOutOfRangePages()) {
return $this->getNbPages();
}
throw new OutOfRangeCurrentPageException(sprintf('Page "%d" does not exist. The currentPage must be inferior to "%d"', $currentPage, $this->getNbPages()));
}
private function resetForCurrentPageChange(): void
{
$this->currentPageResults = null;
}
/**
* @return int
*/
public function getCurrentPage()
{
return $this->currentPage;
}
/**
* @return iterable
*/
public function getCurrentPageResults()
{
if ($this->notCachedCurrentPageResults()) {
$this->currentPageResults = $this->getCurrentPageResultsFromAdapter();
}
return $this->currentPageResults;
}
private function notCachedCurrentPageResults(): bool
{
return null === $this->currentPageResults;
}
private function getCurrentPageResultsFromAdapter(): iterable
{
$offset = $this->calculateOffsetForCurrentPageResults();
$length = $this->getMaxPerPage();
return $this->adapter->getSlice($offset, $length);
}
private function calculateOffsetForCurrentPageResults(): int
{
return ($this->getCurrentPage() - 1) * $this->getMaxPerPage();
}
/**
* Calculates the current page offset start.
*
* @return int
*/
public function getCurrentPageOffsetStart()
{
return $this->getNbResults() ? $this->calculateOffsetForCurrentPageResults() + 1 : 0;
}
/**
* Calculates the current page offset end.
*
* @return int
*/
public function getCurrentPageOffsetEnd()
{
return $this->hasNextPage() ? $this->getCurrentPage() * $this->getMaxPerPage() : $this->getNbResults();
}
/**
* @return int
*/
public function getNbResults()
{
if ($this->notCachedNbResults()) {
$this->nbResults = $this->getAdapter()->getNbResults();
}
return $this->nbResults;
}
private function notCachedNbResults(): bool
{
return null === $this->nbResults;
}
/**
* @return int
*/
public function getNbPages()
{
$nbPages = $this->calculateNbPages();
if (0 === $nbPages) {
return $this->minimumNbPages();
}
return $nbPages;
}
private function calculateNbPages(): int
{
return (int) ceil($this->getNbResults() / $this->getMaxPerPage());
}
private function minimumNbPages(): int
{
return 1;
}
/**
* @return bool
*/
public function haveToPaginate()
{
return $this->getNbResults() > $this->maxPerPage;
}
/**
* @return bool
*/
public function hasPreviousPage()
{
return $this->currentPage > 1;
}
/**
* @return int
*
* @throws LogicException if there is no previous page
*/
public function getPreviousPage()
{
if (!$this->hasPreviousPage()) {
throw new LogicException('There is no previous page.');
}
return $this->currentPage - 1;
}
/**
* @return bool
*/
public function hasNextPage()
{
return $this->currentPage < $this->getNbPages();
}
/**
* @return int
*
* @throws LogicException if there is no next page
*/
public function getNextPage()
{
if (!$this->hasNextPage()) {
throw new LogicException('There is no next page.');
}
return $this->currentPage + 1;
}
/**
* @return int
*/
public function count()
{
return $this->getNbResults();
}
/**
* @return \Traversable
*/
public function getIterator()
{
$results = $this->getCurrentPageResults();
if ($results instanceof \Iterator) {
return $results;
}
if ($results instanceof \IteratorAggregate) {
return $results->getIterator();
}
return new \ArrayIterator($results);
}
/**
* @return iterable
*/
public function jsonSerialize()
{
$results = $this->getCurrentPageResults();
if ($results instanceof \Traversable) {
return iterator_to_array($results);
}
return $results;
}
private function toInteger($value)
{
if ($this->needsToIntegerConversion($value)) {
return (int) $value;
}
return $value;
}
private function needsToIntegerConversion($value): bool
{
return (\is_string($value) || \is_float($value)) && (int) $value == $value;
}
/**
* Get page number of the item at specified position (1-based index).
*
* @param int $position
*
* @return int
*
* @throws NotIntegerException if the position is not an integer
* @throws OutOfBoundsException if the item is outside the result set
*/
public function getPageNumberForItemAtPosition($position)
{
if (!\is_int($position)) {
throw new NotIntegerException();
}
if ($this->getNbResults() < $position) {
throw new OutOfBoundsException(sprintf('Item requested at position %d, but there are only %d items.', $position, $this->getNbResults()));
}
return (int) ceil($position / $this->getMaxPerPage());
}
}

vendor/pagerfanta/pagerfanta/src/Pagerfanta.php line 16