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Add new BoundariesPager

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This commit is contained in:
Hypolite Petovan 2020-02-16 03:23:27 -05:00
parent 2b4317d472
commit e89e606b88
2 changed files with 140 additions and 5 deletions
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135
src/Content/BoundariesPager.php Normal file
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@ -0,0 +1,135 @@
<?php
/**
* @copyright Copyright (C) 2020, Friendica
*
* @license GNU AGPL version 3 or any later version
*
* 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 <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Content;
use Friendica\Core\Renderer;
use Friendica\DI;
use Friendica\Util\Network;
use Friendica\Util\Strings;
/**
* This pager should be used by lists using the since_id/max_id parameters
*
* In this context, "id" refers to the value of the column that the list is ordered by.
* This pager automatically identifies if the sorting is done increasingly or decreasingly if the first item id
* and last item id are different. Otherwise it defaults to decreasingly like reverse chronological lists.
*/
class BoundariesPager extends Pager
{
protected $first_item_id;
protected $last_item_id;
protected $first_page = true;
/**
* Instantiates a new Pager with the base parameters.
*
* @param string $queryString The query string of the current page
* @param string $first_item_id The i
* @param string $last_item_id
* @param integer $itemsPerPage An optional number of items per page to override the default value
*/
public function __construct($queryString, $first_item_id = null, $last_item_id = null, $itemsPerPage = 50)
{
parent::__construct($queryString, $itemsPerPage);
$this->first_item_id = $first_item_id;
$this->last_item_id = $last_item_id;
$parsed = parse_url($this->getBaseQueryString());
if ($parsed) {
parse_str($parsed['query'], $queryParameters);
$this->first_page = !($queryParameters['since_id'] ?? null) && !($queryParameters['max_id'] ?? null);
unset($queryParameters['since_id']);
unset($queryParameters['max_id']);
$parsed['query'] = http_build_query($queryParameters);
$url = Network::unparseURL($parsed);
$this->setQueryString($url);
}
}
public function getStart()
{
throw new \BadMethodCallException();
}
public function getPage()
{
throw new \BadMethodCallException();
}
/**
* Minimal pager (newer/older)
*
* This mode is intended for reverse chronological pages and presents only two links, newer (previous) and older (next).
* The itemCount is the number of displayed items. If no items are displayed, the older button is disabled.
*
* Example usage:
*
* $params = ['order' => ['sort_field' => true], 'limit' => $itemsPerPage];
* $items = DBA::toArray(DBA::select($table, $fields, $condition, $params));
*
* $pager = new BoundariesPager($a->query_string, $items[0]['sort_field'], $items[coutn($items) - 1]['sort_field'], $itemsPerPage);
*
* $html = $pager->renderMinimal(count($items));
*
* @param int $itemCount The number of displayed items on the page
* @return string HTML string of the pager
* @throws \Exception
*/
public function renderMinimal(int $itemCount)
{
$displayedItemCount = max(0, intval($itemCount));
$data = [
'class' => 'pager',
'prev' => [
'url' => Strings::ensureQueryParameter($this->baseQueryString .
($this->first_item_id >= $this->last_item_id ?
'&since_id=' . $this->first_item_id : '&max_id=' . $this->first_item_id)
),
'text' => DI::l10n()->t('newer'),
'class' => 'previous' . ($this->first_page ? ' disabled' : '')
],
'next' => [
'url' => Strings::ensureQueryParameter($this->baseQueryString .
($this->first_item_id >= $this->last_item_id ?
'&max_id=' . $this->last_item_id : '&since_id=' . $this->last_item_id)
),
'text' => DI::l10n()->t('older'),
'class' => 'next' . ($displayedItemCount < $this->getItemsPerPage() ? ' disabled' : '')
]
];
$tpl = Renderer::getMarkupTemplate('paginate.tpl');
return Renderer::replaceMacros($tpl, ['pager' => $data]);
}
public function renderFull($itemCount)
{
throw new \BadMethodCallException();
}
}

10
src/Content/Pager.php
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@ -37,12 +37,12 @@ class Pager
/**
* @var integer
*/
private $itemsPerPage = 50;
protected $itemsPerPage = 50;
/**
* @var string
*/
private $baseQueryString = '';
protected $baseQueryString = '';
/**
* Instantiates a new Pager with the base parameters.
@ -154,11 +154,11 @@ class Pager
*
* $html = $pager->renderMinimal(count($items));
*
* @param integer $itemCount The number of displayed items on the page
* @param int $itemCount The number of displayed items on the page
* @return string HTML string of the pager
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \Exception
*/
public function renderMinimal($itemCount)
public function renderMinimal(int $itemCount)
{
$displayedItemCount = max(0, intval($itemCount));