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<?php |
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namespace Vehikl\Flip; |
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/** |
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* @method boolean enabled(...$params) |
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*/ |
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abstract class Feature |
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{ |
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const ENABLED = 'enabled'; |
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const DISABLED = 'disabled'; |
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private static $resolver; |
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protected $caller; |
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protected static $forceState; |
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// Maybe it's worth requiring an interface be applied? |
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public function __construct($caller) |
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{ |
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$this->caller = $caller; |
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} |
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public static function new($caller): Feature |
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{ |
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return new static($caller); |
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} |
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abstract public function toggles(): array; |
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public static function registerResolver($resolver): void |
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{ |
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self::$resolver = $resolver; |
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} |
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public function resolver(): Resolver |
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{ |
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if (! self::$resolver) { |
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self::registerResolver(new DefaultResolver); |
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} |
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return self::$resolver; |
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} |
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public function hasToggle(string $method): bool |
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{ |
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return array_key_exists($method, $this->toggles()); |
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} |
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protected function caller() |
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{ |
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return $this->caller; |
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} |
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private function methodToCall(string $toggle): string |
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{ |
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$toggles = $this->toggles(); |
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if (array_key_exists($toggle, $toggles)) { |
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// if $toggles was a class, it'd be a lot less error prone. |
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return $this->resolver()->resolve($this, 'enabled') ? $toggles[$toggle]['on'] : $toggles[$toggle]['off']; |
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} |
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return $toggle; |
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} |
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public function __call($name, $arguments) |
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{ |
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$methodToCall = $this->methodToCall($name); |
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if (method_exists($this, $methodToCall)) { |
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return $this->{$methodToCall}(...$arguments); |
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} |
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// Probably easier to just expect a public method. |
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$name = (new \ReflectionClass($this->caller()))->getMethod($methodToCall); |
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$name->setAccessible(true); |
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return $name->invoke($this->caller(), $arguments); |
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} |
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public static function __callStatic($method, $arguments) |
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{ |
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// Could be extracted, but I wonder how reliable this would be? |
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// Does it really improve the API that much? |
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$caller = Caller::guess(); |
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$instance = new static($caller); |
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return $instance->{$method}($arguments); |
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} |
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public static function alwaysOn() : void |
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{ |
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static::$forceState = self::ENABLED; |
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} |
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public static function alwaysOff() : void |
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{ |
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static::$forceState = self::DISABLED; |
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} |
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public function hasForcedState() : bool |
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{ |
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return static::$forceState !== null; |
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} |
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public function isAlwaysOn() : bool |
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{ |
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return static::$forceState === self::ENABLED; |
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} |
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} |
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vehikl /
flip
