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zack6849/HeaderPagination.php

Last active July 2, 2018 08:29
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Magento 2 Pagination in header
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HeaderPagination.php
<?php
namespace Revival\Seo\Block;
use Magento\Framework\View\Element\Template;
/**
* To make this appear in the header for the catalog, you'd need to add this as a block in ${THEME_DIR}/Magento_Catalog/layout/catalog_category_view.xml
*
* EG:
*
* <?xml version="1.0"?>
* <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="2columns-left" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
* <body>
* <referenceBlock name="head.additional">
* <block class="Revival\Seo\Block\HeaderPagination" name="pagination" template="pagination.phtml">
* </block>
* </referenceBlock>
* </body>
* </page>
*
* All that the phtml really does is call $this->getPageHeaders(), omitted for brevity.
*
*/
class HeaderPagination extends \Magento\Framework\View\Element\Template {
/** @var $registry \Magento\Framework\Registry */
public $registry = null;
/** @var $catalog \Magento\Catalog\Model\Category */
public $category = null;
/** @var $logger \Psr\Log\LoggerInterface */
public $logger = null;
/** @var $context \Magento\Framework\View\Element\Template\Context */
public $context = null;
/** @var $toolbar \Magento\Catalog\Block\Product\ProductList\Toolbar; */
public $toolbar = null;
/** @var $pager \Magento\Theme\Block\Html\Pager */
public $pager = null;
public function __construct(Template\Context $context, array $data = [],\Magento\Framework\Registry $registry, \Magento\Catalog\Block\Product\ProductList\Toolbar $toolbar, \Magento\Theme\Block\Html\Pager $pager)
{
parent::__construct($context, $data);
if($registry == null){
$this->_logger->debug("[!] Received null registry from DI!");
}
$this->context = $context;
$this->registry = $registry;
$this->category = $registry->registry('current_category');
$this->toolbar = $toolbar;
$this->pager = $pager;
}
public function getPageHeaders(){
//set pager and toolbar to use same collection, make sure they're both in agreement as to page limiting
$this->toolbar->setCollection($this->category->getProductCollection());
$tool = $this->pager->setCollection($this->category->getProductCollection());
$tool->setShowPerPage($this->toolbar->getLimit());
$has_prev_page = $has_next_page = false;
$next_page_url = $prev_page_url = '';
//calculate last page, round down to nearest int, 4.9 pages still means only 4 pages.
$last_page = intval((($this->category->getProductCollection()->count() - 1) / $this->toolbar->getLimit()) + 1);
$current_page = $this->toolbar->getCurrentPage();
//don't show a previous page on the first page, or if the last page is 1.
if($current_page != 1 && $this->toolbar->getLastPageNum() != 1){
$has_prev_page = true;
$params = $this->getRequest()->getParams();
//remove ?id param for category identification.
$params['id'] = null;
$params[$tool->getPageVarName()] = $current_page-1;
$prev_page_url = $this->toolbar->getPagerUrl($params);
//$prev_page_url = $tool->getPreviousPageUrl();
}
//if our page isn't the last page, show the next one.
if($current_page != $last_page){
$has_next_page = true;
$params = $this->getRequest()->getParams();
//remove ?id param for category identification.
$params['id'] = null;
$params[$tool->getPageVarName()] = $current_page+1;
$next_page_url = $this->toolbar->getPagerUrl($params);
//$next_page_url = $tool->getNextPageUrl();
}
if($has_prev_page){
echo "<link rel='prev' href='{$prev_page_url}'>". PHP_EOL;
}
if($has_next_page){
echo "<link rel='next' href='{$next_page_url}'>". PHP_EOL;
}
}
}
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