Implement remote logout for #7

Author: Greg Bowler

src/Authenticator.php

@@ -3,6 +3,7 @@
 
 use Authwave\ProviderUri\AdminUri;
 use Authwave\ProviderUri\AuthUri;
+use Authwave\ProviderUri\LogoutUri;
 use Gt\Http\Uri;
 use Gt\Session\SessionContainer;
 use Psr\Http\Message\UriInterface;
@@ -79,6 +80,7 @@ public function login(Token $token = null):void {
 	public function logout():void {
 // TODO: Should the logout redirect the user agent to the redirectPath?
 		$this->session->remove(self::SESSION_KEY);
+		$this->redirectHandler->redirect($this->getLogoutUri());
 	}
 
 	public function getUuid():string {
@@ -109,6 +111,10 @@ public function getAdminUri(
 		);
 	}
 
+	public function getLogoutUri():UriInterface {
+		return new LogoutUri($this->authwaveHost);
+	}
+
 	private function completeAuth():void {
 		$responseCipher = $this->getResponseCipher();
 

src/ProviderUri/LogoutUri.php

@@ -0,0 +1,12 @@
+<?php
+namespace Authwave\ProviderUri;
+
+class LogoutUri extends AbstractProviderUri {
+	const PATH_LOGOUT = "/logout";
+
+	public function __construct(string $baseRemoteUri) {
+		$baseRemoteUri = $this->normaliseBaseUri($baseRemoteUri);
+		parent::__construct($baseRemoteUri);
+		$this->path = self::PATH_LOGOUT;
+	}
+}

test/phpunit/AuthenticatorTest.php

@@ -72,10 +72,15 @@ public function testLogoutClearsSession() {
 			Authenticator::SESSION_KEY => $sessionData
 		];
 
+		$redirectHandler = self::createMock(RedirectHandler::class);
+
 		$sut = new Authenticator(
 			"example-app-id",
 			"test-key",
-			"/"
+			"/",
+			AuthUri::DEFAULT_BASE_REMOTE_URI,
+			null,
+			$redirectHandler
 		);
 		$sut->logout();
 		self::assertEmpty($_SESSION);