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<?php |
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namespace Ffcms\Core\Helper\HTML; |
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use Ffcms\Core\Helper\Type\Any; |
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use Ffcms\Core\Helper\Type\Arr; |
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use Ffcms\Core\Helper\Type\Obj; |
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/** |
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* Class SimplePagination. Build and display html pagination block |
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* @package Ffcms\Core\Helper\HTML |
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*/ |
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class SimplePagination |
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{ |
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protected $url; |
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protected $page; |
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protected $step; |
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protected $total; |
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/** |
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* SimplePagination constructor. Parse passed elements |
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* @param array $elements |
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*/ |
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public function __construct(array $elements) |
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{ |
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$this->url = $elements['url']; |
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$this->page = (int)$elements['page']; |
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$this->step = (int)$elements['step'] > 0 ? (int)$elements['step'] : 5; |
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$this->total = (int)$elements['total']; |
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} |
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/** |
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* Display pagination html code. Must be initialized via (new SimplePagination([params]))->display(['class' => 'test']) |
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* @param array|null $property |
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* @return null|string |
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*/ |
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public function display(array $property = null): ?string |
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{ |
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// total items is less to pagination requirement |
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if (($this->page * $this->step) + 1 > $this->total) { |
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return null; |
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} |
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$lastPage = ceil($this->total / $this->step); // 6/5 ~ 2 = 0..2 |
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if ($lastPage <= 1) { |
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return null; |
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} |
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// prevent hack-boy's any try |
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if ($this->page > $lastPage) { |
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return null; |
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} |
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$items = []; |
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// more then 10 items in pagination |
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if ($lastPage > 10) { |
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if ($this->page < 4 || $lastPage - $this->page <= 4) { // list start, page in [0..4] |
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// from start to 4 |
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$items = $this->generateItems(0, 4); |
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// add "..." button |
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$items[] = [ |
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'type' => 'link', 'link' => '#', 'text' => '...', 'property' => ['class' => 'disabled'] |
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]; |
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// add middle page |
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$middlePage = ceil($lastPage / 2); |
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$items[] = [ |
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'type' => 'link', 'link' => $this->setUrlPage($middlePage), 'text' => $middlePage + 1 |
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]; |
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// add "..." button |
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$items[] = [ |
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'type' => 'link', 'link' => '#', 'text' => '...', 'property' => ['class' => 'disabled'] |
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]; |
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$items = Arr::merge($items, $this->generateItems($lastPage - 4, $lastPage)); |
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} else { // meanwhile on middle |
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// generate 1-2 pages |
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$items = $this->generateItems(0, 2); |
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// add "..." button |
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$items[] = [ |
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'type' => 'link', 'link' => '#', 'text' => '...', 'property' => ['class' => 'disabled'] |
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]; |
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// add middle variance -3..mid..+3 |
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$items = Arr::merge($items, $this->generateItems($this->page - 3, $this->page + 3)); |
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// add "..." button |
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$items[] = [ |
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'type' => 'link', 'link' => '#', 'text' => '...', 'property' => ['class' => 'disabled'] |
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]; |
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// add latest 2 items |
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$items = Arr::merge($items, $this->generateItems($lastPage - 2, $lastPage)); |
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} |
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} else { // less then 10 items in pagination |
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$items = $this->generateItems(0, $lastPage); |
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} |
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return Listing::display([ |
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'type' => 'ul', |
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'property' => $property, |
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'items' => $items |
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]); |
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} |
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/** |
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* Set GET param to property array |
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* @param int|string $pageId |
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* @return array |
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*/ |
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protected function setUrlPage($pageId) |
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{ |
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$url = $this->url; |
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switch (count($url)) { // check nulls if not set |
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case 1: // only controller/action is defined |
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$url[1] = null; |
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$url[2] = null; |
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break; |
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case 2: |
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$url[2] = null; |
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break; |
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} |
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// add page param if > 0 |
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if ((int)$pageId > 0) { |
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// merge with ?page if query is not empty |
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$url[3] = (Any::isArray($url[3]) ? Arr::merge($url[3], ['page' => $pageId]) : ['page' => $pageId]); |
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} |
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return $url; |
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} |
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/** |
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* Generate item array to build pagination listing |
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* @param int $start |
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* @param int $end |
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* @return array|null |
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*/ |
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protected function generateItems($start, $end) |
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{ |
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// prevent any shit's |
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if ($end <= $start) { |
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return null; |
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} |
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$items = []; |
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for ($i = $start; $i < $end; $i++) { |
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$items[] = [ |
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'type' => 'link', 'link' => $this->setUrlPage($i), 'text' => $i + 1 |
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]; |
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} |
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return $items; |
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} |
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} |
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phpffcms /
ffcms-core
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