131 lines
3.0 KiB
PHP
131 lines
3.0 KiB
PHP
<?php
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namespace Grav\Plugin\Pagination;
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use Grav\Common\Grav;
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use Grav\Common\Iterator;
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use Grav\Common\Page\Collection;
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use Grav\Common\Uri;
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class PaginationHelper extends Iterator
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{
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protected $current;
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protected $items_per_page;
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protected $page_count;
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protected $url_params;
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/**
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* Create and initialize pagination.
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*
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* @param Collection $collection
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*/
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public function __construct(Collection $collection)
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{
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parent::__construct();
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$grav = Grav::instance();
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/** @var Uri $uri */
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$uri = $grav['uri'];
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$config = $grav['config'];
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$this->current = $uri->currentPage();
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// get params
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$url_params = explode('/', ltrim($uri->params(), '/'));
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$params = $collection->params();
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foreach ($url_params as $key => $value) {
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if (strpos($value, 'page' . $config->get('system.param_sep')) !== false) {
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unset($url_params[$key]);
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}
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if (isset($params['ignore_url_params'])) {
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foreach ((array)$params['ignore_params'] as $ignore_param) {
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if (strpos($value, $ignore_param . $config->get('system.param_sep')) !== false) {
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unset($url_params[$key]);
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}
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}
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}
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}
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$this->url_params = '/'.implode('/', $url_params);
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// check for empty params
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if ($this->url_params === '/') {
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$this->url_params = '';
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}
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$this->items_per_page = $params['limit'];
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$this->page_count = ceil($collection->count() / $this->items_per_page);
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for ($x=1; $x <= $this->page_count; $x++) {
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if ($x === 1) {
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$this->items[$x] = new PaginationPage($x, '');
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} else {
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$this->items[$x] = new PaginationPage($x, '/page' . $config->get('system.param_sep') . $x);
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}
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}
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}
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/**
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* Returns true if current item has previous sibling.
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*
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* @return bool
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*/
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public function hasPrev()
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{
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if (array_key_exists($this->current -1, $this->items)) {
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return true;
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}
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return false;
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}
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/**
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* Returns true if current item has next sibling.
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*
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* @return bool
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*/
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public function hasNext()
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{
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if (array_key_exists($this->current +1, $this->items)) {
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return true;
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}
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return false;
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}
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/**
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* Return previous url.
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*
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* @return string|null
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*/
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public function prevUrl()
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{
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if (array_key_exists($this->current -1, $this->items)) {
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return $this->items[$this->current -1]->url;
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}
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return null;
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}
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/**
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* Return next url.
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*
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* @return string|null
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*/
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public function nextUrl()
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{
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if (array_key_exists($this->current +1, $this->items)) {
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return $this->items[$this->current +1]->url;
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}
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return null;
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}
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public function params()
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{
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return $this->url_params;
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}
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}
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