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wp-content/plugins/gravitysmtp/includes/experimental-features/class-experimental-features-handler.php

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+<?php
+
+namespace Gravity_Forms\Gravity_SMTP\Experimental_Features;
+
+use Gravity_Forms\Gravity_SMTP\Data_Store\Data_Store_Router;
+use Gravity_Forms\Gravity_SMTP\Utils\Booliesh;
+
+class Experiment_Features_Handler {
+
+	const ENABLED_EXPERIMENTS_PARAM = 'enabled_experimental_features';
+
+	protected $experiments = array(
+		'alerts_management',
+	);
+
+	/**
+	 * @var Data_Store_Router
+	 */
+	protected $data_router;
+
+	public function __construct( Data_Store_Router $data_router ) {
+		$this->data_router = $data_router;
+	}
+
+	public function feature_flag_callback( $is_enabled, $flag_slug ) {
+		if ( ! in_array( $flag_slug, $this->experiments ) ) {
+			return $is_enabled;
+		}
+
+		$enabled_experiments = $this->data_router->get_plugin_setting( self::ENABLED_EXPERIMENTS_PARAM, array() );
+
+		if ( empty( $enabled_experiments ) ) {
+			return false;
+		}
+
+		if ( ! isset( $enabled_experiments[ $flag_slug ] ) ) {
+			return false;
+		}
+
+		return Booliesh::get( $enabled_experiments[ $flag_slug ] );
+	}
+
+}

wp-content/plugins/gravitysmtp/includes/experimental-features/class-experimental-features-service-provider.php

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+<?php
+
+namespace Gravity_Forms\Gravity_SMTP\Experimental_Features;
+
+use Gravity_Forms\Gravity_SMTP\Connectors\Connector_Service_Provider;
+use Gravity_Forms\Gravity_SMTP\Feature_Flags\Feature_Flag_Repository;
+use Gravity_Forms\Gravity_Tools\Service_Container;
+use Gravity_Forms\Gravity_Tools\Service_Provider;
+
+class Experimental_Features_Service_Provider extends Service_Provider {
+
+	const EXPERIMENTAL_FEATURE_HANDLER = 'experimental_feature_handler';
+
+	public function register( Service_Container $container ) {
+		$container->add( self::EXPERIMENTAL_FEATURE_HANDLER, function() use ( $container ) {
+			return new Experiment_Features_Handler( $container->get( Connector_Service_Provider::DATA_STORE_ROUTER ) );
+		} );
+	}
+
+	public function init( Service_Container $container ) {
+		add_filter( Feature_Flag_Repository::FILTER_SINGLE_FEATURE_FLAG, function( $is_enabled, $flag_slug ) use ( $container ) {
+			return $container->get( self::EXPERIMENTAL_FEATURE_HANDLER )->feature_flag_callback( $is_enabled, $flag_slug );
+		}, 10, 2 );
+	}
+
+}