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<?php |
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namespace PubPeerFoundation\PublicationDataExtractor\Models; |
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use Exception; |
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use Tightenco\Collect\Support\Arr; |
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class Model |
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{ |
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/** |
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* This var should never be used, in favor of Model's internal var. |
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* |
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* @var array |
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*/ |
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protected $list = []; |
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/** |
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* List of statically created instances. |
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* |
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* @var array |
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*/ |
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private static $instances = []; |
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protected function __construct() |
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{ |
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} |
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protected function __clone() |
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{ |
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} |
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/** |
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* @throws Exception |
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*/ |
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public function __wakeup() |
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{ |
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throw new Exception('Cannot unserialize singleton'); |
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} |
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/** |
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* Return the current Model's instance. |
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* |
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* @return Model |
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*/ |
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public static function getInstance() |
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{ |
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$cls = get_called_class(); |
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if (! isset(self::$instances[$cls])) { |
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self::$instances[$cls] = new static(); |
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} |
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return self::$instances[$cls]; |
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} |
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/** |
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* Figure out which values are already known. |
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* |
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* @param $key |
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* @return array |
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*/ |
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protected function knownIdentifierValues($key): array |
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{ |
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return array_map(function ($value) { |
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return strtolower($value); |
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}, Arr::pluck($this->list, $key)); |
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} |
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/** |
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* Should the attribute be kept? |
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* |
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* @param $key |
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* @param $value |
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* @return bool |
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*/ |
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protected function shouldKeepAttribute($key, $value): bool |
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{ |
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$function = is_array($value) ? 'count' : 'strlen'; |
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if (! isset($this->list[$key])) { |
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return true; |
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} |
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return $function($this->list[$key]) > $function($value); |
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} |
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protected function reset() |
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{ |
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$this->list = []; |
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} |
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} |
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PubPeerFoundation /
PublicationDataExtractor
