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<?php |
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namespace brendt\stitcher\adapter; |
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use brendt\stitcher\factory\AdapterFactory; |
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use brendt\stitcher\site\Page; |
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/** |
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* The PaginationAdapter takes a page with a collection of entries and generates pagination for that collection. |
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* |
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* Sample configuration: |
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* |
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* /examples: |
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* template: examples/overview |
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* data: |
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* collection: collection.yml |
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* adapters: |
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* pagination: |
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* variable: collection |
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* entriesPerPage: 4 |
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*/ |
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class PaginationAdapter extends AbstractAdapter { |
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/** |
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* @param Page $page |
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* @param null $filter |
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* |
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* @return Page[] |
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*/ |
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public function transform(Page $page, $filter = null) { |
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$config = $page->getAdapterConfig(AdapterFactory::PAGINATION_ADAPTER); |
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if (!isset($config['variable'])) { |
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return [$page]; |
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} |
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$variable = $config['variable']; |
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if (!$source = $page->getVariable($variable)) { |
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throw new VariableNotFoundException("Variable \"{$variable}\" was not set as a data variable for page \"{$page->getId()}\""); |
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} |
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$pageId = rtrim($page->getId(), '/'); |
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$entries = $this->getData($source); |
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$entriesPerPage = isset($config['entriesPerPage']) ? $config['entriesPerPage'] : 10; |
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$pageCount = (int) ceil(count($entries) / $entriesPerPage); |
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$i = 0; |
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$result = []; |
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while ($i < $pageCount) { |
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$pageEntries = array_splice($entries, 0, $entriesPerPage); |
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$pageIndex = $i + 1; |
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if ($filter && $pageIndex !== (int) $filter) { |
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$i += 1; |
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continue; |
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} |
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$url = "{$pageId}/page-{$pageIndex}"; |
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$pagination = $this->createPagination($pageId, $pageIndex, $pageCount, $entries); |
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$entriesPage = clone $page; |
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$entriesPage |
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->removeAdapter(AdapterFactory::PAGINATION_ADAPTER) |
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->setVariableValue($variable, $pageEntries) |
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->setVariableIsParsed($variable) |
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->setVariableValue('pagination', $pagination) |
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->setVariableIsParsed('pagination') |
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->setId($url); |
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$result[$url] = $entriesPage; |
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$i += 1; |
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} |
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if ($firstPage = reset($result)) { |
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$mainPage = clone $firstPage; |
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$mainPage->setId($pageId); |
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$result[$pageId] = $mainPage; |
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} |
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return $result; |
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} |
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/** |
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* Create a pagination array. |
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* |
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* @param $pageId |
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* @param $pageIndex |
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* @param $pageCount |
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* @param $entries |
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* |
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* @return array |
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*/ |
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protected function createPagination($pageId, $pageIndex, $pageCount, $entries) { |
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$next = count($entries) ? $pageIndex + 1 : null; |
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$nextUrl = $next ? "{$pageId}/page-{$next}" : null; |
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$previous = $pageIndex > 1 ? $pageIndex - 1 : null; |
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$previousUrl = $previous ? "{$pageId}/page-{$previous}" : null; |
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return [ |
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'current' => $pageIndex, |
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'previous' => $previous ? [ |
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'url' => $previousUrl, |
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'index' => $previous, |
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] : null, |
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'next' => $next ? [ |
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'url' => $nextUrl, |
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'index' => $next, |
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] : null, |
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'pages' => $pageCount, |
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]; |
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} |
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} |
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pageon /
stitcher-core
