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<?php |
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namespace Morozgrafix\Twig\Extension; |
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use Twig\Extension\AbstractExtension; |
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use Twig\TwigFunction; |
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/** |
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* Twig extension to help generate simple paginations. |
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*/ |
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class PaginatorTwigExtension extends AbstractExtension { |
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public function getName() { |
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return 'paginator'; |
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} |
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public function getFunctions() { |
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return [ |
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new TwigFunction('paginator', [$this, 'generatePaginationData']), |
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]; |
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} |
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public function generatePaginationData(int $curr_page, int $last_page, int $num_items = 7, string $separator = '...') { |
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// number of items needs to be an even number for better layout |
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// rounding to nearest even number |
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if ($num_items % 2 == 0) { |
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$num_items++; |
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} |
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$pagination = []; |
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// if total number of pages less or equal to number of items |
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if ($last_page <= $num_items) { |
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$pagination = range(1, $last_page); |
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// otherwise calculate pagination array |
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} else { |
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// minimum number of items is 7 |
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if ($num_items < 7) { |
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$num_items = 7; |
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} |
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// if current page is in the beginning return pagination with added end separator and last page |
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if ($curr_page < ($num_items - 2)) { |
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$pagination = array_merge($pagination, range(1, $num_items - 2)); |
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$pagination[] = $separator; |
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$pagination[] = $last_page; |
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// if current page in the middle return first page, front separator, pagination, end separator, last page |
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} elseif (($curr_page > ($num_items - 3)) && ($curr_page < ($last_page - 3))) { |
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$pagination[] = 1; |
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$pagination[] = $separator; |
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$pagination = array_merge($pagination, range($curr_page - ($num_items - 5) / 2, $curr_page + ($num_items - 5) / 2)); |
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$pagination[] = $separator; |
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$pagination[] = $last_page; |
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// if current page at the end return first page, front separator and rest of pagination |
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} else { |
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$pagination[] = 1; |
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$pagination[] = $separator; |
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$pagination = array_merge($pagination, range($last_page - $num_items + 3, $last_page)); |
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} |
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} |
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return array('curr_page' => $curr_page, 'last_page' => $last_page, 'num_items' => $num_items, 'separator' => $separator, 'pagination' => $pagination); |
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} |
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} |
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morozgrafix /
PaginatorTwigExtension
