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If you have not already installed the SDK, you can do so with Composer: + +```bash +composer require open-feature/php-sdk +``` + +Next, include the FliptProvider in your project: + +```bash +composer require open-feature/flipt-provider +``` + +## Usage +To use the FliptProvider, you'll need to create an instance of it by passing your Flipt host, API token, and namespace (if applicable). Then, set this provider for OpenFeature. + +Here's a quick example: + +```php + +use OpenFeature\OpenFeature; +use OpenFeature\Providers\Flipt\FliptProvider; + +// Replace these with your actual Flipt host and API token +$host = 'http://your-flipt-instance'; +$apiToken = 'your-api-token'; +$namespace = 'namespace'; + +$provider = new FliptProvider($host, $apiToken, $namespace); + +OpenFeature::setProvider($provider); + +// Now you can evaluate your feature flags as follows +$booleanFlagValue = OpenFeatureAPI::getInstance()->getClient()->getBooleanValue('your-boolean-flag-key', false); +$stringFlagValue = OpenFeatureAPI::getInstance()->getClient()->getStringValue('your-string-flag-key', 'default-value'); +$integerFlagValue = OpenFeatureAPI::getInstance()->getClient()->getIntegerValue('your-integer-flag-key', 0); +$floatFlagValue = OpenFeatureAPI::getInstance()->getClient()->getFloatValue('your-float-flag-key', 0.0); +$objectFlagValue = OpenFeatureAPI::getInstance()->getClient()->getObjectValue('your-object-flag-key', ['default' => 'value']); +``` + +### Caching + +If you like to cache the feature flag results you need a [PSR-16](https://www.php-fig.org/psr/psr-16/) compatible cache storage. +Then you simple wrap the FliptProvider (or any other provider) with a new CacheProvider instance as the following example shows. +This way all the feature flag requests are cached to optimize performance. + +```php +use OpenFeature\Providers\Flipt\FliptProvider; +use OpenFeature\Providers\Flipt\CacheProvider; + +$fliptProvider = new FliptProvider($host, $apiToken, $namespace); +$cache = new CacheProvider( $fliptProvider,'' ); + +OpenFeatureAPI::getInstance()->setProvider($cache); + + +// to clear the cache you can call +$cache->clear(); +``` diff --git a/providers/Flipt/composer.json b/providers/Flipt/composer.json new file mode 100644 index 00000000..93e9f156 --- /dev/null +++ b/providers/Flipt/composer.json @@ -0,0 +1,34 @@ +{ + "name": "open-feature/flipt-provider", + "description": "The flipt.io provider package for open-feature", + "keywords": [ + "flipt", + "open-feature", + "feature flags" + ], + "homepage": "https://github.com/legoheld/flipt-provider", + "require": { + "php": ">=8.0", + "open-feature/sdk": "^2.0", + "flipt-io/flipt": "^0.2.0", + "psr/simple-cache": "^3.0.0" + }, + "require-dev": { + "mockery/mockery": "^1.6", + "phpunit/php-code-coverage": "^10", + "phpunit/phpunit": "^10.4" + }, + "autoload": { + "psr-4": { + "OpenFeature\\Providers\\Flipt\\": "src/" + } + }, + "autoload-dev": { + "psr-4": { + "OpenFeature\\Providers\\Flagd\\Test\\": "tests/" + } + }, + "config": { + "sort-packages": true + } +} diff --git a/providers/Flipt/phpunit.xml b/providers/Flipt/phpunit.xml new file mode 100644 index 00000000..bda511f3 --- /dev/null +++ b/providers/Flipt/phpunit.xml @@ -0,0 +1,11 @@ + + + + + tests + + + \ No newline at end of file diff --git a/providers/Flipt/src/CacheProvider.php b/providers/Flipt/src/CacheProvider.php new file mode 100644 index 00000000..ae7aaf3e --- /dev/null +++ b/providers/Flipt/src/CacheProvider.php @@ -0,0 +1,162 @@ +provider = $provider; + $this->storage = $storage; + $this->key = $key; + } + + + public function resolveBooleanValue(string $flagKey, bool $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->cacheCheck( + $this->hash($flagKey, $defaultValue, $context), + fn () => $this->provider->resolveBooleanValue($flagKey, $defaultValue, $context) + ); + } + + public function resolveStringValue(string $flagKey, string $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->cacheCheck( + $this->hash($flagKey, $defaultValue, $context), + fn () => $this->provider->resolveStringValue($flagKey, $defaultValue, $context) + ); + } + + public function resolveIntegerValue(string $flagKey, int $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->cacheCheck( + $this->hash($flagKey, $defaultValue, $context), + fn () => $this->provider->resolveIntegerValue($flagKey, $defaultValue, $context) + ); + } + + public function resolveFloatValue(string $flagKey, float $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->cacheCheck( + $this->hash($flagKey, $defaultValue, $context), + fn () => $this->provider->resolveFloatValue($flagKey, $defaultValue, $context) + ); + } + + public function resolveObjectValue(string $flagKey, array $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->cacheCheck( + $this->hash($flagKey, $defaultValue, $context), + fn () => $this->provider->resolveObjectValue($flagKey, $defaultValue, $context) + ); + } + + + protected function cacheCheck(string $key, Closure $next) + { + + $cached = $this->get($key); + if (isset($cached)) return $cached; + + $result = $next(); + + $this->set($key, $result); + + return $result; + } + + + /** + * Retrievies a value from the cache + */ + protected function get($key) + { + + $entries = $this->storage->get($this->key, []); + + if (array_key_exists($key, $entries)) return $entries[$key]; + + return null; + } + + + /** + * Sets the $value into the cache + */ + protected function set($key, $value) + { + + + $entries = $this->storage->get($this->key, []); + $entries[$key] = $value; + + $this->storage->set($this->key, $entries); + } + + + + /** + * Clears the cached records + */ + public function clear() + { + $this->storage->delete($this->key); + } + + + + protected function hash(string $flag, mixed $default, ?EvaluationContext $context) + { + + // check null context + if (empty($context)) { + $attributes = []; + $id = null; + } else { + $attributes = $context->getAttributes()->toArray(); + $id = $context->getTargetingKey(); + } + + // generate hash on request arguments + return md5(json_encode([ + 'flag' => $flag, + 'default' => $default, + 'id' => $id, 'context' => $this->sortArray($attributes) + ])); + } + + + + protected function sortArray(array $array) + { + $sortedArray = []; + + foreach ($array as $key => $value) { + if (is_array($value)) { + // Recursively sort nested arrays + $value = $this->sortArray($value); + } + $sortedArray[$key] = $value; + } + + // Sort the array by keys + ksort($sortedArray); + + return $sortedArray; + } +} diff --git a/providers/Flipt/src/FliptProvider.php b/providers/Flipt/src/FliptProvider.php new file mode 100644 index 00000000..5eb9288c --- /dev/null +++ b/providers/Flipt/src/FliptProvider.php @@ -0,0 +1,119 @@ +client = ( is_string( $hostOrClient ) ) ? new FliptClient( $hostOrClient, $apiToken, $namespace ) : $hostOrClient; + } + + + public function resolveBooleanValue(string $flagKey, bool $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->resolveValue($flagKey, FlagValueType::BOOLEAN, $defaultValue, $context); + } + + public function resolveStringValue(string $flagKey, string $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->resolveValue($flagKey, FlagValueType::STRING, $defaultValue, $context); + } + + public function resolveIntegerValue(string $flagKey, int $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->resolveValue($flagKey, FlagValueType::INTEGER, $defaultValue, $context); + } + + public function resolveFloatValue(string $flagKey, float $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->resolveValue($flagKey, FlagValueType::FLOAT, $defaultValue, $context); + } + + /** + * @param mixed[] $defaultValue + */ + public function resolveObjectValue(string $flagKey, array $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + return $this->resolveValue($flagKey, FlagValueType::OBJECT, $defaultValue, $context); + } + + + + /** + * @param bool|string|int|float|mixed[] $defaultValue + */ + private function resolveValue(string $flagKey, string $flagType, mixed $defaultValue, ?EvaluationContext $context = null): ResolutionDetails + { + + // check null context + if( empty( $context ) ) { + $attributes = []; + $id = null; + } else { + $attributes = $context->getAttributes()->toArray(); + $id = $context->getTargetingKey(); + } + + // booleans need a dedicated function + if( $flagType == FlagValueType::BOOLEAN ) { + $result = $this->client->boolean( $flagKey, $attributes, $id ); + } else { + $result = $this->client->variant( $flagKey, $attributes, $id ); + } + + + // there is a match + // not sure yet as the variant result has a getMatch() but not the boolean result. + if( $result->getReason() == ResponseReasons::MATCH_EVALUATION_REASON || $result->getReason() == ResponseReasons::DEFAULT_EVALUATION_REASON ) { + $result = ResolutionDetailsFactory::fromSuccess( $this->castResult( $result, $flagType ) ); + } else { + $result = (new ResolutionDetailsBuilder()) + ->withValue( $defaultValue ) + ->withError( + // not sure if thie reason to error mapping is correct + new ResolutionError(ErrorCode::GENERAL(), $result->getReason() ), + ) + ->build(); + } + + return $result; + } + + + + private function castResult( VariantEvaluationResult|BooleanEvaluationResult $result, string $type ) { + switch ($type) { + case FlagValueType::BOOLEAN: + return filter_var($result->getEnabled(), FILTER_VALIDATE_BOOLEAN); + case FlagValueType::FLOAT: + return (float) $result->getVariantKey(); + case FlagValueType::INTEGER: + return (int) $result->getVariantKey(); + case FlagValueType::OBJECT: + return json_decode( $result->getVariantAttachment(), true); + case FlagValueType::STRING: + return $result->getVariantKey(); + default: + return null; + } + } + +} \ No newline at end of file diff --git a/providers/Flipt/tests/CacheProviderTest.php b/providers/Flipt/tests/CacheProviderTest.php new file mode 100644 index 00000000..88619fbe --- /dev/null +++ b/providers/Flipt/tests/CacheProviderTest.php @@ -0,0 +1,60 @@ +mockProvider = Mockery::mock( FliptProvider::class ); + $this->storage = Mockery::mock( CacheInterface::class ); + $this->provider = new CacheProvider( $this->mockProvider, $this->storage ); + } + + + protected function tearDown(): void + { + Mockery::close(); + } + + public function testSet() + { + + $context = new EvaluationContext( 'id', new Attributes( [ 'context' => 'demo' ] ) ); + + $this->storage->shouldReceive( 'get')->with( 'open-feature', [] )->andReturn( [] ); + $this->storage->shouldReceive( 'set')->withArgs( function( $key, $content ) { + $this->assertEquals( $key, 'open-feature' ); + $this->assertArrayHasKey( 'fa89ea8c3b16386166360dd163f10e6d', $content ); + $this->assertInstanceOf( ResolutionDetails::class, $content['fa89ea8c3b16386166360dd163f10e6d' ]); + return true; + }); + $this->mockProvider->shouldReceive( 'resolveBooleanValue') + ->with( 'flag', true, $context ) + ->andReturn( ResolutionDetailsFactory::fromSuccess( true ) ); + + $result = $this->provider->resolveBooleanValue( 'flag', true, $context ); + + $this->assertEquals( $result->getValue(), true ); + } +} \ No newline at end of file diff --git a/providers/Flipt/tests/FliptProviderTest.php b/providers/Flipt/tests/FliptProviderTest.php new file mode 100644 index 00000000..84030d94 --- /dev/null +++ b/providers/Flipt/tests/FliptProviderTest.php @@ -0,0 +1,130 @@ +mockClient = Mockery::mock( 'overload:' . FliptClient::class ); + $this->provider = new FliptProvider( $this->mockClient ); + } + + + protected function tearDown(): void + { + Mockery::close(); + } + + + public function testBoolean() + { + $this->mockClient->shouldReceive( 'boolean') + ->withArgs( function( $flag, $context, $entityId ) { + $this->assertEquals( $flag, 'flag' ); + $this->assertEquals( $context, [ 'context' => 'demo' ] ); + $this->assertEquals( $entityId, 'id' ); + return true; + }) + ->andReturn( new DefaultBooleanEvaluationResult( true, ModelsResponseReasons::MATCH_EVALUATION_REASON, 0.1, 'rid', '13245' ) ); + + $result = $this->provider->resolveBooleanValue( 'flag', false, new EvaluationContext( 'id', new Attributes( [ 'context' => 'demo' ] ) ) ); + + $this->assertInstanceOf( ResolutionDetails::class, $result ); + $this->assertEquals( $result->getValue(), true ); + + } + + public function testInteger() + { + $this->mockClient->shouldReceive( 'variant') + ->withArgs( function( $flag, $contextRecv, $entityId ) { + $this->assertEquals( $flag, 'flag' ); + $this->assertEquals( $contextRecv, [ 'context' => 'demo' ] ); + $this->assertEquals( $entityId, 'id' ); + return true; + }) + ->andReturn( new DefaultVariantEvaluationResult( true, ModelsResponseReasons::MATCH_EVALUATION_REASON, 0.1, 'rid', '13245', [], '20', '{"json":1}' ) ); + + $result = $this->provider->resolveIntegerValue( 'flag', 10, new EvaluationContext( 'id', new Attributes( [ 'context' => 'demo' ] ) ) ); + + $this->assertInstanceOf( ResolutionDetails::class, $result ); + $this->assertEquals( $result->getValue(), 20 ); + + } + + public function testFloat() + { + $this->mockClient->shouldReceive( 'variant') + ->withArgs( function( $flag, $contextRecv, $entityId ) { + $this->assertEquals( $flag, 'flag' ); + $this->assertEquals( $contextRecv, [ 'context' => 'demo' ] ); + $this->assertEquals( $entityId, 'id' ); + return true; + }) + ->andReturn( new DefaultVariantEvaluationResult( true, ModelsResponseReasons::MATCH_EVALUATION_REASON, 0.1, 'rid', '13245', [], '0.2345', '{"json":1}' ) ); + + $result = $this->provider->resolveFloatValue( 'flag', 0.1111, new EvaluationContext( 'id', new Attributes( [ 'context' => 'demo' ] ) ) ); + + $this->assertInstanceOf( ResolutionDetails::class, $result ); + $this->assertEquals( $result->getValue(), 0.2345 ); + + } + + public function testString() + { + $this->mockClient->shouldReceive( 'variant') + ->withArgs( function( $flag, $contextRecv, $entityId ) { + $this->assertEquals( $flag, 'flag' ); + $this->assertEquals( $contextRecv, [ 'context' => 'demo' ] ); + $this->assertEquals( $entityId, 'id' ); + return true; + }) + ->andReturn( new DefaultVariantEvaluationResult( true, ModelsResponseReasons::MATCH_EVALUATION_REASON, 0.1, 'rid', '13245', [], 'My string', '{"json":1}' ) ); + + $result = $this->provider->resolveStringValue( 'flag', 'base', new EvaluationContext( 'id', new Attributes( [ 'context' => 'demo' ] ) ) ); + + $this->assertInstanceOf( ResolutionDetails::class, $result ); + $this->assertEquals( $result->getValue(), 'My string' ); + + } + + + public function testObject() + { + $this->mockClient->shouldReceive( 'variant') + ->withArgs( function( $flag, $contextRecv, $entityId ) { + $this->assertEquals( $flag, 'flag' ); + $this->assertEquals( $contextRecv, [ 'context' => 'demo' ] ); + $this->assertEquals( $entityId, 'id' ); + return true; + }) + ->andReturn( new DefaultVariantEvaluationResult( true, ModelsResponseReasons::MATCH_EVALUATION_REASON, 0.1, 'rid', '13245', [], 'My string', '{"json":1}' ) ); + + $result = $this->provider->resolveObjectValue( 'flag', [], new EvaluationContext( 'id', new Attributes( [ 'context' => 'demo' ] ) ) ); + + $this->assertInstanceOf( ResolutionDetails::class, $result ); + $this->assertEquals( $result->getValue(), [ "json" => 1 ] ); + + } + + + + +}