New SettingsInterface

modules/ppcp-wc-gateway/src/Settings/Settings.php

@@ -15,7 +15,7 @@
 /**
  * Class Settings
  */
-class Settings implements ContainerInterface {
+class Settings implements SettingsGetterInterface, ContainerInterface {
 
 	const KEY               = 'woocommerce-ppcp-settings';
 	const CONNECTION_TAB_ID = 'ppcp-connection';
@@ -103,6 +103,19 @@ public function has( $id ) {
 		return array_key_exists( $id, $this->settings );
 	}
 
+	/**
+	 * {@inheritDoc}
+	 *
+	 * Replaces `$settings->has() ? $settings->get() : $default` chains.
+	 */
+	public function get_value( string $key, $default = null ) {
+		try {
+			return $this->get( $key );
+		} catch ( NotFoundException $e ) {
+			return $default;
+		}
+	}
+
 	/**
 	 * Sets a value.
 	 *

modules/ppcp-wc-gateway/src/Settings/SettingsGetterInterface.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * Interface for settings-accessor classes.
+ *
+ * @package WooCommerce\PayPalCommerce\WcGateway\Settings
+ */
+
+declare( strict_types = 1 );
+
+namespace WooCommerce\PayPalCommerce\WcGateway\Settings;
+
+/**
+ * Interface for accessing plugin settings (read-only).
+ *
+ * Implements a WordPress-like settings access signature: `get_value()` is inspired by the
+ * `get_option()` core method.
+ *
+ * In contrast to the `ContainerInterface`, this interface will never throw an Exception.
+ */
+interface SettingsGetterInterface {
+	/**
+	 * Get a single value from stored settings.
+	 *
+	 * @param string $key     The key to retrieve.
+	 * @param mixed  $default The default value if the key is not found.
+	 *
+	 * @return mixed The value or the default.
+	 */
+	public function get_value( string $key, $default = null );
+}