137 lines
4.5 KiB
PHP
137 lines
4.5 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2020, Friendica
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Content;
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use Friendica\Core\L10n;
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use Friendica\Core\Renderer;
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use Friendica\Util\Network;
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use Friendica\Util\Strings;
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/**
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* This pager should be used by lists using the min_id†/max_id† parameters
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*
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* This pager automatically identifies if the sorting is done increasingly or decreasingly if the first item id†
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* and last item id† are different. Otherwise it defaults to decreasingly like reverse chronological lists.
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*
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* † In this context, "id" refers to the value of the column that the item list is ordered by.
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*/
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class BoundariesPager extends Pager
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{
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protected $first_item_id;
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protected $last_item_id;
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protected $first_page = true;
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/**
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* Instantiates a new Pager with the base parameters.
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*
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* @param L10n $l10n
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* @param string $queryString The query string of the current page
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* @param string $first_item_id The id† of the first item in the displayed item list
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* @param string $last_item_id The id† of the last item in the displayed item list
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* @param integer $itemsPerPage An optional number of items per page to override the default value
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*/
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public function __construct(L10n $l10n, $queryString, $first_item_id = null, $last_item_id = null, $itemsPerPage = 50)
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{
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parent::__construct($l10n, $queryString, $itemsPerPage);
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$this->first_item_id = $first_item_id;
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$this->last_item_id = $last_item_id;
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$parsed = parse_url($this->getBaseQueryString());
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if (!empty($parsed['query'])) {
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parse_str($parsed['query'], $queryParameters);
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$this->first_page = !($queryParameters['min_id'] ?? null) && !($queryParameters['max_id'] ?? null);
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unset($queryParameters['min_id']);
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unset($queryParameters['max_id']);
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$parsed['query'] = http_build_query($queryParameters);
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$url = Network::unparseURL($parsed);
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$this->setQueryString($url);
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}
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}
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public function getStart()
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{
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throw new \BadMethodCallException();
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}
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public function getPage()
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{
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throw new \BadMethodCallException();
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}
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/**
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* Minimal pager (newer/older)
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*
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* This mode is intended for reverse chronological pages and presents only two links, newer (previous) and older (next).
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* The itemCount is the number of displayed items. If no items are displayed, the older button is disabled.
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*
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* Example usage:
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*
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* $params = ['order' => ['sort_field' => true], 'limit' => $itemsPerPage];
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* $items = DBA::toArray(DBA::select($table, $fields, $condition, $params));
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*
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* $pager = new BoundariesPager($a->query_string, $items[0]['sort_field'], $items[coutn($items) - 1]['sort_field'], $itemsPerPage);
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*
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* $html = $pager->renderMinimal(count($items));
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*
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* @param int $itemCount The number of displayed items on the page
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* @return string HTML string of the pager
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* @throws \Exception
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*/
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public function renderMinimal(int $itemCount)
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{
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$displayedItemCount = max(0, intval($itemCount));
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$data = [
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'class' => 'pager',
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'prev' => [
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'url' => Strings::ensureQueryParameter($this->baseQueryString .
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($this->first_item_id >= $this->last_item_id ?
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'&min_id=' . $this->first_item_id : '&max_id=' . $this->first_item_id)
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),
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'text' => $this->l10n->t('newer'),
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'class' => 'previous' . ($this->first_page ? ' disabled' : '')
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],
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'next' => [
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'url' => Strings::ensureQueryParameter($this->baseQueryString .
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($this->first_item_id >= $this->last_item_id ?
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'&max_id=' . $this->last_item_id : '&min_id=' . $this->last_item_id)
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),
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'text' => $this->l10n->t('older'),
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'class' => 'next' . ($displayedItemCount < $this->getItemsPerPage() ? ' disabled' : '')
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]
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];
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$tpl = Renderer::getMarkupTemplate('paginate.tpl');
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return Renderer::replaceMacros($tpl, ['pager' => $data]);
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}
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public function renderFull($itemCount)
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{
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throw new \BadMethodCallException();
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}
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}
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