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<?php |
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namespace MusicBrainz\Filters; |
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/** |
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* This is the abstract filter which |
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* contains the constructor which all |
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* filters share because the only |
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* difference between each filter class |
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* is the valid argument types. |
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* |
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*/ |
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abstract class AbstractFilter |
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{ |
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/** |
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* @var array |
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*/ |
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protected $validArgTypes; |
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/** |
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* @var array |
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*/ |
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protected $validArgs = array(); |
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/** |
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* @var array |
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*/ |
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protected $protectedArgs = array( |
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'arid' |
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); |
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/** |
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* @param array $args |
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*/ |
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public function __construct(array $args) |
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{ |
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foreach ($args as $key => $value) { |
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if (in_array($key, $this->validArgTypes)) { |
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$this->validArgs[$key] = $value; |
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} |
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} |
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} |
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/** |
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* @param array $params |
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* |
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* @return array |
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*/ |
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public function createParameters(array $params = array()) |
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{ |
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$params = $params + array('query' => ''); |
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if (empty($this->validArgs) || $params['query'] != '') { |
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return $params; |
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} |
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foreach ($this->validArgs as $key => $val) { |
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if ($params['query'] != '') { |
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$params['query'] .= '+AND+'; |
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} |
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if (!in_array($key, $this->protectedArgs)) { |
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// Lucene escape characters |
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$val = urlencode( |
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preg_replace('/([\+\-\!\(\)\{\}\[\]\^\~\*\?\:\\\\])/', '\\\\$1', $val) |
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); |
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} |
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// If the search string contains a space, wrap it in brackets/quotes |
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// This isn't always wanted, but for the searches required in this |
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// library, I'm going to do it. |
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if (preg_match('/[\+]/', $val)) { |
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$val = '(' . $val . ')'; |
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} |
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$params['query'] .= $key . ':' . $val; |
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} |
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return $params; |
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} |
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} |
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powered-by-moe /
MusicBrainz
