updated plugin Two Factor version 0.9.1

wp-content/plugins/two-factor/providers/class-two-factor-provider.php

@@ -14,6 +14,23 @@
  */
 abstract class Two_Factor_Provider {
 
+	/**
+	 * Ensures only one instance of the provider class exists in memory at any one time.
+	 *
+	 * @since 0.1-dev
+	 */
+	public static function get_instance() {
+		static $instances = array();
+
+		$class_name = static::class;
+
+		if ( ! isset( $instances[ $class_name ] ) ) {
+			$instances[ $class_name ] = new $class_name;
+		}
+
+		return $instances[ $class_name ];
+	}
+
 	/**
 	 * Class constructor.
 	 *
@@ -32,6 +49,21 @@ abstract class Two_Factor_Provider {
 	 */
 	abstract public function get_label();
 
+	/**
+	 * Returns the "continue with" text provider for the login screen.
+	 *
+	 * @since 0.9.0
+	 *
+	 * @return string
+	 */
+	public function get_alternative_provider_label() {
+		return sprintf(
+			/* translators: the two factor provider name */
+			__( 'Use %s', 'two-factor' ),
+			$this->get_label()
+		);
+	}
+
 	/**
 	 * Prints the name of the provider.
 	 *
@@ -41,6 +73,17 @@ abstract class Two_Factor_Provider {
 		echo esc_html( $this->get_label() );
 	}
 
+	/**
+	 * Retrieves the provider key / slug.
+	 *
+	 * @since 0.9.0
+	 *
+	 * @return string
+	 */
+	public function get_key() {
+		return get_class( $this );
+	}
+
 	/**
 	 * Prints the form that prompts the user to authenticate.
 	 *