1 files changed, 73 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Services/ServicesContainer.php b/www/wiki/extensions/SemanticMediaWiki/src/Services/ServicesContainer.php
new file mode 100644
index 00000000..d5d763a2
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/Services/ServicesContainer.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace SMW\Services;
+
+use RuntimeException;
+
+/**
+ * @private
+ *
+ * @license GNU GPL v2+
+ * @since 3.0
+ *
+ * @author mwjames
+ */
+class ServicesContainer {
+
+	/**
+	 * @var callable[]
+	 */
+	private $services;
+
+	/**
+	 * @since 3.0
+	 */
+	public function __construct( array $services = [] ) {
+		$this->services = $services;
+	}
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param string $key
+	 *
+	 * @return mixed
+	 */
+	public function get( $key, ...$args ) {
+
+		if ( !isset( $this->services[$key] ) ) {
+			throw new RuntimeException( "$key is an unknown service!" );
+		};
+
+		$type = null;
+		$service = $this->services[$key];
+
+		if ( !is_callable( $service ) && isset( $service['_type'] ) && isset( $service['_service'] ) ) {
+			$type = $service['_type'];
+			$service = $service['_service'];
+		}
+
+		if ( !is_callable( $service ) ) {
+			throw new RuntimeException( "$key is not a callable service!" );
+		};
+
+		$instance = $service( ...$args );
+
+		if ( $type !== null && !is_a( $instance, $type ) ) {
+			throw new RuntimeException( "Service $key is not of the expected $type type!" );
+		}
+
+		return $instance;
+	}
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param string $key
+	 * @param callable $service
+	 */
+	public function add( $key, callable $service ) {
+		$this->services[$key] = $service;
+	}
+
+}