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<?php |
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namespace Brendt\Stitcher\Adapter; |
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use Brendt\Stitcher\Exception\ConfigurationException; |
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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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* Order a collection of variables by a specified field. |
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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/detail |
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* data: |
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* example: collection.yml |
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* adapters: |
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* order: |
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* variable: example |
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* field: id |
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* direction: desc |
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*/ |
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class OrderAdapter extends AbstractAdapter |
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{ |
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/** |
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* A collection of keywords which would reverse the data set. |
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* |
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* @var array |
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*/ |
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private static $reverse = [ |
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'desc', |
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'DESC', |
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'-', |
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]; |
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/** |
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* @param Page $page |
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* @param string|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 = $page->getAdapterConfig(AdapterFactory::ORDER_ADAPTER); |
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$this->validateConfig($config); |
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$variable = $config['variable']; |
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$field = $config['field']; |
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$direction = isset($config['direction']) ? $config['direction'] : null; |
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$entries = $this->getData($page->getVariable($variable)); |
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uasort($entries, function ($a, $b) use ($field) { |
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return strcmp($a[$field], $b[$field]); |
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}); |
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if (in_array($direction, self::$reverse)) { |
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$entries = array_reverse($entries, true); |
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} |
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$page->setVariableValue($variable, $entries) |
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->setVariableIsParsed($variable); |
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/** @var Page[] $result */ |
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$result = [$page->getId() => $page]; |
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return $result; |
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} |
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/** |
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* @param array $config |
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* |
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* @throws ConfigurationException |
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*/ |
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private function validateConfig(array $config) { |
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if (!isset($config['variable']) || !isset($config['field'])) { |
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throw new ConfigurationException('Both the configuration entry `field` and `variable` are required when using the Order adapter.'); |
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} |
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} |
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} |
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pageon /
stitcher-core
