FreshRSS/lib/Minz/Paginator.php

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<?php
declare(strict_types=1);
/**
* MINZ - Copyright 2011 Marien Fressinaud
* Sous licence AGPL3 <http://www.gnu.org/licenses/>
*/
/**
* The Minz_Paginator is used to handle paging
*/
class Minz_Paginator {
/**
* @var array<Minz_Model> tableau des éléments à afficher/gérer
*/
private array $items = [];
/**
* le nombre d'éléments par page
*/
private int $nbItemsPerPage = 10;
/**
* page actuelle à gérer
*/
private int $currentPage = 1;
/**
* le nombre de pages de pagination
*/
private int $nbPage = 1;
/**
* le nombre d'éléments
*/
private int $nbItems = 0;
/**
* Constructeur
* @param array<Minz_Model> $items les éléments à gérer
*/
public function __construct(array $items) {
$this->_items($items);
$this->_nbItems(count($this->items(true)));
$this->_nbItemsPerPage($this->nbItemsPerPage);
$this->_currentPage($this->currentPage);
}
/**
* Permet d'afficher la pagination
* @param string $view nom du fichier de vue situé dans /app/views/helpers/
* @param string $getteur variable de type $_GET[] permettant de retrouver la page
*/
public function render(string $view, string $getteur = 'page'): void {
$view = APP_PATH . '/views/helpers/' . $view;
if (file_exists($view)) {
include($view);
}
}
/**
* Permet de retrouver la page d'un élément donné
* @param Minz_Model $item l'élément à retrouver
* @return int|false la page à laquelle se trouve lélément, false si non trouvé
*/
public function pageByItem($item) {
$i = 0;
do {
if ($item == $this->items[$i]) {
return (int)(ceil(($i + 1) / $this->nbItemsPerPage));
}
$i++;
} while ($i < $this->nbItems());
return false;
}
/**
* Search the position (index) of a given element
* @param Minz_Model $item the element to search
* @return int|false the position of the element, or false if not found
*/
public function positionByItem($item) {
$i = 0;
do {
if ($item == $this->items[$i]) {
return $i;
}
$i++;
} while ($i < $this->nbItems ());
return false;
}
/**
* Permet de récupérer un item par sa position
* @param int $pos la position de l'élément
* @return Minz_Model item situé à $pos (dernier item si $pos<0, 1er si $pos>=count($items))
*/
public function itemByPosition(int $pos): Minz_Model {
if ($pos < 0) {
$pos = $this->nbItems () - 1;
}
if ($pos >= count($this->items)) {
$pos = 0;
}
return $this->items[$pos];
}
/**
* GETTEURS
*/
/**
* @param bool $all si à true, retourne tous les éléments sans prendre en compte la pagination
* @return array<Minz_Model>
*/
public function items(bool $all = false): array {
$array = array ();
$nbItems = $this->nbItems ();
if ($nbItems <= $this->nbItemsPerPage || $all) {
$array = $this->items;
} else {
$begin = ($this->currentPage - 1) * $this->nbItemsPerPage;
$counter = 0;
$i = 0;
foreach ($this->items as $key => $item) {
if ($i >= $begin) {
$array[$key] = $item;
$counter++;
}
if ($counter >= $this->nbItemsPerPage) {
break;
}
$i++;
}
}
return $array;
}
public function nbItemsPerPage(): int {
return $this->nbItemsPerPage;
}
public function currentPage(): int {
return $this->currentPage;
}
public function nbPage(): int {
return $this->nbPage;
}
public function nbItems(): int {
return $this->nbItems;
}
/**
* SETTEURS
*/
/** @param array<Minz_Model> $items */
public function _items(?array $items): void {
$this->items = $items ?? [];
$this->_nbPage();
}
public function _nbItemsPerPage(int $nbItemsPerPage): void {
if ($nbItemsPerPage > $this->nbItems ()) {
$nbItemsPerPage = $this->nbItems ();
}
if ($nbItemsPerPage < 0) {
$nbItemsPerPage = 0;
}
$this->nbItemsPerPage = $nbItemsPerPage;
$this->_nbPage();
}
public function _currentPage(int $page): void {
if ($page < 1 || ($page > $this->nbPage && $this->nbPage > 0)) {
throw new Minz_CurrentPagePaginationException($page);
}
$this->currentPage = $page;
}
private function _nbPage(): void {
if ($this->nbItemsPerPage > 0) {
$this->nbPage = (int)ceil($this->nbItems() / $this->nbItemsPerPage);
}
}
public function _nbItems(int $value): void {
$this->nbItems = $value;
}
}