chill-bundles/Pagination/Paginator.php

248 lines
5.7 KiB
PHP

<?php
/*
* Chill is a software for social workers
* Copyright (C) 2016 Champs-Libres Coopérative <info@champs-libres.coop>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
namespace Chill\MainBundle\Pagination;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
/**
* Standard paginator class.
*
* Represent a set of paginated pages;
*
* @author Julien Fastré <julien.fastre@champs-libres.coop>
* @author Champs Libres <info@champs-libres.coop>
*/
class Paginator implements PaginatorInterface
{
/**
* The number of total items
*
* @var int
*/
protected $totalItems;
/**
* the number of items on a single page
*
* @var int
*/
protected $itemPerPage;
/**
* The number of the current page
*
* @var int
*/
protected $currentPageNumber;
/**
* the route of the pages
*
* @var string
*/
protected $route;
/**
* the parameters of the route
*
* @var string[]
*/
protected $routeParameters;
/**
* the generator for url
*
* @var UrlGeneratorInterface
*/
protected $urlGenerator;
/**
* the key in the GET parameter to indicate the page number in
* generated routes
*
* @var string
*/
protected $pageKey;
/**
* the key in the GET parameter to indicate the number of item per page
*
* @var string
*/
protected $itemPerPageKey;
public function __construct(
$totalItems,
$itemPerPage,
$currentPageNumber,
$route,
array $routeParameters,
UrlGeneratorInterface $urlGenerator,
$pageKey,
$itemPerPageKey
) {
$this->totalItems = $totalItems;
$this->itemPerPage = $itemPerPage;
$this->currentPageNumber = $currentPageNumber;
$this->route = $route;
$this->routeParameters = $routeParameters;
$this->urlGenerator = $urlGenerator;
$this->pageKey = $pageKey;
$this->itemPerPageKey = $itemPerPageKey;
}
public function count()
{
return $this->countPages();
}
/**
*
* @return \Chill\MainBundle\Pagination\Page
*/
public function getCurrentPage()
{
return $this->getPage($this->currentPageNumber);
}
public function getCurrentPageFirstItemNumber()
{
return $this->getCurrentPage()->getFirstItemNumber();
}
public function isCurrentPage(PageInterface $page)
{
return $page->getNumber() === $this->currentPageNumber;
}
public function getItemsPerPage()
{
return $this->itemPerPage;
}
public function setItemsPerPage($itemPerPage)
{
$this->itemPerPage = $itemPerPage;
}
public function getTotalItems()
{
return $this->totalItems;
}
public function countPages()
{
$nb = floor($this->totalItems / $this->itemPerPage);
if ($this->totalItems % $this->itemPerPage > 0) {
$nb++;
}
return $nb == 0 ? 1 : (int) $nb;
}
/**
*
* @return \Chill\MainBundle\Pagination\Page
* @throws \RuntimeException if the next page does not exists
*/
public function getNextPage()
{
if (!$this->hasNextPage()) {
throw new \RuntimeException("this page has no next page");
}
return $this->getPage($this->currentPageNumber + 1);
}
/**
*
* @return \Chill\MainBundle\Pagination\Page
* @throws \RuntimeException if the next page does not exists
*/
public function getPreviousPage()
{
if (!$this->hasPreviousPage()) {
throw new \RuntimeException("this page has no previous page");
}
return $this->getPage($this->currentPageNumber - 1);
}
/**
*
* @return bool
*/
public function hasNextPage()
{
return $this->hasPage($this->currentPageNumber + 1);
}
/**
*
* @return bool
*/
public function hasPreviousPage()
{
return $this->hasPage($this->currentPageNumber - 1);
}
public function hasPage($number)
{
return $number > 0 and
$number <= $this->countPages();
}
/**
*
* @param type $number
* @return \Chill\MainBundle\Pagination\Page
*/
public function getPage($number) {
if (!$this->hasPage($number)) {
throw new \RuntimeException("The page with number $number does not "
. "exists");
}
return new Page(
$number,
$this->itemPerPage,
$this->urlGenerator,
$this->route,
array_merge($this->routeParameters, array(
$this->pageKey => $number,
$this->itemPerPageKey => $this->itemPerPage
)),
$this->totalItems
);
}
public function getPagesGenerator()
{
for ($i = 1; $i <= $this->countPages(); $i++) {
yield $this->getPage($i);
}
}
}