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<?php |
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namespace Stitcher\Page\Adapter; |
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use Stitcher\Adapter; |
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use Stitcher\Exception\InvalidConfiguration; |
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use Stitcher\Validatory; |
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use Stitcher\Variable\VariableParser; |
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class PaginationAdapter implements Adapter, Validatory |
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{ |
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private $variableParser; |
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private $variable; |
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private $perPage; |
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public function __construct(array $adapterConfiguration, VariableParser $variableParser) |
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{ |
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if (! $this->isValid($adapterConfiguration)) { |
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throw InvalidConfiguration::invalidAdapterConfiguration('pagination', '`variable`, `perPage`'); |
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} |
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$this->variable = $adapterConfiguration['variable']; |
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$this->perPage = $adapterConfiguration['perPage'] ?? 12; |
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$this->variableParser = $variableParser; |
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} |
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public static function make(array $adapterConfiguration, VariableParser $variableParser): PaginationAdapter |
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{ |
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return new self($adapterConfiguration, $variableParser); |
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} |
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public function transform(array $pageConfiguration): array |
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{ |
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$paginationPageConfiguration = []; |
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$entries = $this->getEntries($pageConfiguration); |
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$pageCount = (int) ceil(count($entries) / $this->perPage); |
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for ($pageIndex = 1; $pageIndex <= $pageCount; $pageIndex++) { |
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$entriesForPage = array_splice($entries, 0, $this->perPage); |
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$entryConfiguration = $this->createPageConfiguration( |
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$pageConfiguration, |
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$entriesForPage, |
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$pageIndex, |
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$pageCount |
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); |
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$paginationPageConfiguration[$entryConfiguration['id']] = $entryConfiguration; |
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} |
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return $paginationPageConfiguration; |
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} |
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public function isValid($subject): bool |
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{ |
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return is_array($subject) && isset($subject['variable']); |
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} |
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protected function getEntries(array $pageConfiguration): ?array |
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{ |
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$variable = $pageConfiguration['variables'][$this->variable] ?? null; |
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$entries = $this->variableParser->parse($variable)['entries'] |
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?? $this->variableParser->parse($variable) |
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?? $variable; |
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return $entries; |
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} |
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protected function createPageConfiguration( |
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array $entryConfiguration, |
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array $entriesForPage, |
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int $pageIndex, |
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int $pageCount |
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): array { |
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$pageId = rtrim($entryConfiguration['id'], '/'); |
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$paginatedId = "{$pageId}/page-{$pageIndex}"; |
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$entryConfiguration['id'] = $paginatedId; |
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$entryConfiguration['variables'][$this->variable] = $entriesForPage; |
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$paginationVariable = $this->createPaginationVariable($pageId, $pageIndex, $pageCount); |
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$entryConfiguration['variables']['_pagination'] = $paginationVariable; |
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unset($entryConfiguration['config']['pagination']); |
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return $entryConfiguration; |
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} |
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protected function createPaginationVariable(string $pageId, int $pageIndex, int $pageCount): array |
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{ |
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return [ |
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'current' => $pageIndex, |
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'previous' => $this->createPreviousPagination($pageId, $pageIndex), |
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'next' => $this->createNextPagination($pageId, $pageIndex, $pageCount), |
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'pages' => $pageCount, |
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]; |
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} |
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protected function createPreviousPagination(string $pageId, int $pageIndex): ?array |
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{ |
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if ($pageIndex <= 1) { |
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return null; |
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} |
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$previous = $pageIndex - 1; |
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return [ |
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'url' => "{$pageId}/page-{$previous}", |
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'index' => $previous, |
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]; |
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} |
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protected function createNextPagination(string $pageId, int $pageIndex, int $pageCount): ?array |
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{ |
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if ($pageIndex >= $pageCount) { |
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return null; |
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} |
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$next = $pageIndex + 1; |
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return [ |
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'url' => "{$pageId}/page-{$next}", |
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'index' => $next, |
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]; |
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} |
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} |
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pageon /
stitcher-core
