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<?php declare(strict_types=1); |
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namespace Formularium\Frontend\HTML\Element; |
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use Formularium\Element; |
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use Formularium\Exception\Exception; |
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use Formularium\Field; |
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use Formularium\HTMLNode; |
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use Formularium\Metadata; |
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use Formularium\MetadataParameter; |
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class Pagination extends Element |
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{ |
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const BASE_URL = 'baseURL'; |
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const CURRENT = 'current'; |
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const CURRENT_PAGE = 'currentPage'; |
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const PAGES_AROUND = 'pagesAround'; |
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const PER_PAGE = 'perPage'; |
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const TOTAL_ITEMS = 'totalItems'; |
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public function render(array $parameters, HTMLNode $previous): HTMLNode |
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{ |
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$pagesaround = intval($parameters[self::PAGES_AROUND] ?? 5); |
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$perpage = intval($parameters[self::PER_PAGE] ?? 20); |
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$baseurl = $parameters[self::BASE_URL] ?? '?'; |
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$numitems = $parameters[self::TOTAL_ITEMS] ?? 0; |
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// use $currentPage when defined |
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if (array_key_exists(self::CURRENT_PAGE, $parameters)) { |
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$currentPage = intval($parameters[self::CURRENT_PAGE]); |
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$currentitem = $currentPage * ($perpage - 1); |
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} else { |
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$currentitem = intval($parameters[self::CURRENT] ?? 0); |
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$currentPage = ceil($currentitem / $perpage); |
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} |
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// $firstindex => first id, same as 'begin' |
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$firstindex = $currentitem - $pagesaround * $perpage; |
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if ($firstindex < 0) { |
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$firstindex = 0; |
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} |
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$maxindex = $currentitem + $pagesaround * $perpage; |
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if ($maxindex > $numitems) { |
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$maxindex = $numitems; |
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} |
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// only one page? don't show anything. |
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if ($maxindex <= $perpage) { |
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return HTMLNode::factory(''); |
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} |
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$query = array(); |
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$parsed = parse_url($baseurl); |
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if ($parsed === false) { |
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throw new Exception('Invalid url' . $baseurl); |
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} |
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if (isset($parsed['query'])) { |
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mb_parse_str($parsed['query'], $query); |
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} |
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$pages = []; |
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if ($firstindex > 0) { |
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$pages[] = $this->getItem('...', '', 'formularium-ellipsis'); |
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} |
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for ($i = $firstindex; $i < $maxindex; $i += $perpage) { |
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$page = $i / $perpage + 1; |
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if ($i < $currentitem && $i + $perpage >= $currentitem) { |
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$pages[] = $this->getItem((string)$page, '', 'formularium-pagination-current'); |
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} else { |
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$parsed['query'] = array_merge($query, array('begin' => $i, 'total' => $perpage)); |
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$baseurl = $this->glue_url($parsed); |
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$pages[] = $this->getItem((string)$page, $baseurl); |
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} |
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} |
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if ($i < $numitems) { |
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// disabled |
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$pages[] = $this->getItem('...', '', 'formularium-ellipsis'); |
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} |
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return HTMLNode::factory( |
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'nav', |
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['class' => 'formularium-pagination-wrapper', 'aria-label' => "Page navigation"], |
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HTMLNode::factory( |
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'ul', |
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['class' => 'formularium-pagination'], |
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$pages |
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) |
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); |
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} |
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protected function getItem(string $text, string $link, string $class = ''): HTMLNode |
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{ |
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return HTMLNode::factory( |
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'li', |
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['class' => ['formularium-pagination-item', $class]], |
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HTMLNode::factory( |
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'a', |
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['class' => 'formularium-pagination-link', 'href' => $link], |
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$text |
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) |
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); |
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} |
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/** |
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* Inverse of parse_url. |
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* |
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* @codeCoverageIgnore |
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* @param array $parsed An array of fields, same ones as returned by parse_url. |
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* In addition, the 'query' field may be an associative array as well. |
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* @return string The URL. |
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*/ |
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protected function glue_url(array $parsed): string |
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{ |
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$uri = ''; |
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if (isset($parsed['scheme'])) { |
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$uri = $parsed['scheme'] ? |
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$parsed['scheme'] . ':' . ((mb_strtolower($parsed['scheme']) == 'mailto') ? '' : '//') : ''; |
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} |
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if (isset($parsed['user'])) { |
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$uri .= $parsed['user'] ? $parsed['user'] . ($parsed['pass'] ? ':' . $parsed['pass'] : '') . '@' : ''; |
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} |
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if (isset($parsed['host'])) { |
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$uri .= $parsed['host'] ? $parsed['host'] : ''; |
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} |
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if (isset($parsed['port'])) { |
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$uri .= $parsed['port'] ? ':' . $parsed['port'] : ''; |
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} |
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if (isset($parsed['path'])) { |
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$uri .= $parsed['path'] ? $parsed['path'] : ''; |
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} |
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if (isset($parsed['query'])) { |
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if (is_array($parsed['query'])) { |
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$uri .= $parsed['query'] ? '?' . http_build_query($parsed['query']) : ''; |
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} elseif (is_string($parsed['query'])) { |
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$uri .= $parsed['query'] ? '?' . $parsed['query'] : ''; |
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} |
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} |
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if (isset($parsed['fragment'])) { |
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$uri .= $parsed['fragment'] ? '#' . $parsed['fragment'] : ''; |
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} |
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return $uri; |
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} |
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public static function getMetadata(): Metadata |
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{ |
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return new Metadata( |
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'Pagination', |
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'Creates a pagination element', |
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[ |
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new MetadataParameter( |
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self::BASE_URL, |
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'string', |
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'Base url for pagination. Default: "?"' |
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), |
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new MetadataParameter( |
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self::CURRENT, |
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'int', |
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'Current item. Conflicts with CURRENT_PAGE, use just one of them.' |
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), |
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new MetadataParameter( |
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self::CURRENT_PAGE, |
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'int', |
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'Current page. Conflicts with CURRENT, use just one of them' |
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), |
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new MetadataParameter( |
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self::PAGES_AROUND, |
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'int', |
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'Maximum pages show before or after the current one' |
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), |
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new MetadataParameter( |
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self::PER_PAGE, |
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'int', |
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'Items per page. Default: 20' |
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), |
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new MetadataParameter( |
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self::TOTAL_ITEMS, |
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'int', |
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'Total items found by query.' |
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) |
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] |
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); |
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} |
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} |
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Corollarium /
Formularium
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