feat: expose additional bindings through extensions

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

src/Extension/BuiltinExtension.php

@@ -4,12 +4,25 @@ declare(strict_types=1);
 
 namespace WPDesk\Init\Extension;
 
+use Psr\Container\ContainerInterface;
+use WPDesk\Init\Binding\DefinitionFactory;
+use WPDesk\Init\Binding\Loader\BindingDefinitions;
+use WPDesk\Init\Binding\Loader\DirectoryBasedLoader;
 use WPDesk\Init\Configuration\ReadableConfig;
 use WPDesk\Init\DependencyInjection\ContainerBuilder;
+use WPDesk\Init\Loader\PhpFileLoader;
 use WPDesk\Init\Plugin\Plugin;
 
 class BuiltinExtension implements Extension {
 
+	public function bindings(ContainerInterface $c): BindingDefinitions {
+		return new DirectoryBasedLoader(
+			__DIR__ . '/../Resources/bindings',
+			new PhpFileLoader(),
+			new DefinitionFactory()
+	   	);
+	}
+
 	public function build( ContainerBuilder $builder, Plugin $plugin, ReadableConfig $config ): void {
 		$builder->add_definitions( __DIR__ . '/../Resources/services.inc.php' );
 	}

src/Extension/ConfigExtension.php

@@ -4,13 +4,34 @@ declare(strict_types=1);
 
 namespace WPDesk\Init\Extension;
 
+use Psr\Container\ContainerInterface;
+use WPDesk\Init\Binding\DefinitionFactory;
+use WPDesk\Init\Binding\Loader\ArrayBindingLoader;
+use WPDesk\Init\Binding\Loader\BindingDefinitions;
+use WPDesk\Init\Binding\Loader\ConfigurationBindingLoader;
+use WPDesk\Init\Configuration\Configuration;
 use WPDesk\Init\Configuration\ReadableConfig;
 use WPDesk\Init\DependencyInjection\ContainerBuilder;
+use WPDesk\Init\Loader\PhpFileLoader;
 use WPDesk\Init\Plugin\Plugin;
 use WPDesk\Init\Util\Path;
 
 class ConfigExtension implements Extension {
 
+	public function bindings( ContainerInterface $c ): BindingDefinitions {
+		$config = $c->get( Configuration::class );
+		if ( $config->has( 'hook_resources_path' ) ) {
+			return new ConfigurationBindingLoader(
+				$c->get( Configuration::class ),
+				$c->get( Plugin::class )->get_path(),
+				new PhpFileLoader(),
+				new DefinitionFactory()
+			);
+		}
+
+		return new ArrayBindingLoader( [] );
+	}
+
 	public function build( ContainerBuilder $builder, Plugin $plugin, ReadableConfig $config ): void {
 		$services = array_map(
 			function ( $service ) use ( $plugin ) {

src/Extension/Extension.php

@@ -3,6 +3,8 @@ declare(strict_types=1);
 
 namespace WPDesk\Init\Extension;
 
+use Psr\Container\ContainerInterface;
+use WPDesk\Init\Binding\Loader\BindingDefinitions;
 use WPDesk\Init\Configuration\ReadableConfig;
 use WPDesk\Init\DependencyInjection\ContainerBuilder;
 use WPDesk\Init\Plugin\Plugin;
@@ -10,4 +12,6 @@ use WPDesk\Init\Plugin\Plugin;
 interface Extension {
 
 	public function build( ContainerBuilder $builder, Plugin $plugin, ReadableConfig $config ): void;
+
+	public function bindings(ContainerInterface $c): BindingDefinitions;
 }

src/Extension/LegacyExtension.php

@@ -4,6 +4,9 @@ declare(strict_types=1);
 
 namespace WPDesk\Init\Extension;
 
+use Psr\Container\ContainerInterface;
+use WPDesk\Init\Binding\Loader\ArrayBindingLoader;
+use WPDesk\Init\Binding\Loader\BindingDefinitions;
 use WPDesk\Init\Configuration\ReadableConfig;
 use WPDesk\Init\DependencyInjection\ContainerBuilder;
 use WPDesk\Init\Plugin\Plugin;
@@ -37,4 +40,8 @@ class LegacyExtension implements Extension {
 
 		return $plugin_info;
 	}
+
+	public function bindings( ContainerInterface $c ): BindingDefinitions {
+		return new ArrayBindingLoader( [] );
+	}
 }

src/Kernel.php

@@ -110,22 +110,9 @@ final class Kernel {
 	}
 
 	private function prepare_driver( ContainerInterface $container ): HookDriver {
-		$loader = new DirectoryBasedLoader(
-			__DIR__ . '/Resources/bindings/index.php',
-			new PhpFileLoader(),
-			new DefinitionFactory()
-		);
-
-		if ( $this->config->has( 'hook_resources_path' ) ) {
-			$loader = new CompositeBindingLoader( $loader );
-			$loader->add(
-				new ConfigurationBindingLoader(
-					$this->config,
-					plugin_dir_path( $this->filename ),
-					new PhpFileLoader(),
-					new DefinitionFactory()
-				)
-			);
+		$loader = new CompositeBindingLoader();
+		foreach ( $this->extensions->bindings($container) as $bindings ) {
+			$loader->add( $bindings );
 		}
 
 		$driver = new GenericDriver(