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<?php |
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namespace Humweb\Features; |
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use Humweb\Features\Strategy\StrategyInterface; |
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/** |
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* Feature registry. |
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*/ |
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class Features |
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{ |
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/** |
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* Features collections. |
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* |
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* @var array |
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*/ |
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protected $features = []; |
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/** |
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* Create a new feature |
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* |
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* @param string $name Feature identifier. |
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* @param string $description Feature description |
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* @param array $strategies array of strategies |
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* |
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* @return StrategyCollection |
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*/ |
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public function create($name, $description = '', $strategies = []) |
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{ |
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if ($this->exists($name)) { |
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throw new \InvalidArgumentException('Duplicate feature identifier.'); |
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} |
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$this->features[$name] = [ |
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'description' => $description, |
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'collection' => new StrategyCollection($strategies), |
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]; |
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return $this->features[$name]['collection']; |
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} |
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/** |
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* Adds strategy to feature |
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* |
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* @param string $feature Feature identifier |
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* @param string $strategyName Strategy name |
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* @param string|callable|StrategyInterface $strategy Strategy class or closure |
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* @param array $args |
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*/ |
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public function pushStrategy($feature, $strategyName, $strategy = null, $args = []) |
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{ |
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if ( ! $this->exists($feature)) { |
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throw new \InvalidArgumentException('Duplicate feature identifier.'); |
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} |
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$this->getCollection($feature)->add($strategyName, $strategy, $args); |
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} |
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/** |
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* Get Collection by feature name |
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* |
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* @param string $name Feature identifier |
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* |
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* @return StrategyCollection |
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*/ |
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public function getCollection($name) |
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{ |
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return $this->get($name, 'collection'); |
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} |
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/** |
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* Checks if a feature with given name exists. |
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* |
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* @param string $name Feature identifier. |
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* |
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* @return bool |
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*/ |
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public function exists($name) |
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{ |
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return isset($this->features[$name]); |
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} |
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/** |
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* Flush all features. |
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*/ |
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public function flush() |
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{ |
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$this->features = []; |
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} |
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/** |
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* Get Feature or item from feature array |
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* |
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* @param string $name |
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* @param null|string $key |
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* |
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* @return |
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*/ |
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public function get($name, $key = null) |
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{ |
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if ( ! $this->exists($name)) { |
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throw new \InvalidArgumentException('Unknown feature identifier.'); |
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} |
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return ! is_null($key) ? $this->features[$name][$key] : $this->features[$name]; |
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} |
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/** |
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* Check if feature is enabled |
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* |
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* @param string $feature Feature identifier |
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* @param array $args arguments passed to strategies checker |
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* |
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* @return bool |
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*/ |
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public function isEnabled($feature, array $args = []) |
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{ |
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return $this->getCollection($feature)->check($args); |
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} |
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/** |
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* Set the feature's threshold |
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* |
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* @param string $name Feature identifier |
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* @param int $threshold |
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* |
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* @return $this |
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*/ |
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public function setThreshold($name, $threshold = 1) |
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{ |
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$this->getCollection($name)->setThreshold($threshold); |
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return $this; |
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} |
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} |
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humweb /
features
