TASK: add option to remove trailing slashes

Classes/Enum/TrailingSlashModeEnum.php

@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Flowpack\SeoRouting\Enum;
+
+enum TrailingSlashModeEnum: string
+{
+    case ADD = 'add';
+    case REMOVE = 'remove';
+}

Classes/Helper/ConfigurationHelper.php

@@ -4,12 +4,13 @@
 
 namespace Flowpack\SeoRouting\Helper;
 
+use Flowpack\SeoRouting\Enum\TrailingSlashModeEnum;
 use Neos\Flow\Annotations as Flow;
 
 #[Flow\Scope('singleton')]
 class ConfigurationHelper
 {
-    /** @var array{enable: array{trailingSlash: bool, toLowerCase: bool}, statusCode?: int} */
+    /** @var array{enable: array{trailingSlash: bool, toLowerCase: bool}, statusCode?: int, trailingSlashMode: string} */
     #[Flow\InjectConfiguration(path: 'redirect')]
     protected array $configuration;
 
@@ -22,6 +23,11 @@ public function isTrailingSlashEnabled(): bool
         return $this->configuration['enable']['trailingSlash'] ?? false;
     }
 
+    public function getTrailingSlashMode(): TrailingSlashModeEnum
+    {
+        return TrailingSlashModeEnum::tryFrom($this->configuration['trailingSlashMode']) ?? TrailingSlashModeEnum::ADD;
+    }
+
     public function isToLowerCaseEnabled(): bool
     {
         return $this->configuration['enable']['toLowerCase'] ?? false;

Classes/Helper/TrailingSlashHelper.php

@@ -11,22 +11,40 @@
 class TrailingSlashHelper
 {
     public function appendTrailingSlash(UriInterface $uri): UriInterface
+    {
+        if (! $this->shouldUriByHandled($uri)) {
+            return $uri;
+        }
+
+        return $uri->withPath(rtrim($uri->getPath(), '/') . '/');
+    }
+
+    public function removeTrailingSlash(UriInterface $uri): UriInterface
+    {
+        if (! $this->shouldUriByHandled($uri)) {
+            return $uri;
+        }
+
+        return $uri->withPath(rtrim($uri->getPath(), '/'));
+    }
+
+    private function shouldUriByHandled(UriInterface $uri): bool
     {
         // bypass links without path
         if (strlen($uri->getPath()) === 0) {
-            return $uri;
+            return false;
         }
 
         // bypass links to files
         if (array_key_exists('extension', pathinfo($uri->getPath()))) {
-            return $uri;
+            return false;
         }
 
         // bypass mailto and tel links
         if (in_array($uri->getScheme(), ['mailto', 'tel'], true)) {
-            return $uri;
+            return false;
         }
 
-        return $uri->withPath(rtrim($uri->getPath(), '/') . '/');
+        return true;
     }
 }

Classes/LinkingServiceAspect.php

@@ -4,6 +4,7 @@
 
 namespace Flowpack\SeoRouting;
 
+use Flowpack\SeoRouting\Enum\TrailingSlashModeEnum;
 use Flowpack\SeoRouting\Helper\BlocklistHelper;
 use Flowpack\SeoRouting\Helper\ConfigurationHelper;
 use Flowpack\SeoRouting\Helper\TrailingSlashHelper;
@@ -26,10 +27,10 @@ class LinkingServiceAspect
     protected BlocklistHelper $blocklistHelper;
 
     /**
-     * This ensures that all internal links are rendered with a trailing slash.
+     * This ensures that all internal links are rendered with/without a trailing slash, depending on configuration.
      */
     #[Flow\Around('method(' . LinkingService::class . '->createNodeUri())')]
-    public function appendTrailingSlashToNodeUri(JoinPointInterface $joinPoint): string
+    public function handleTrailingSlashForNodeUri(JoinPointInterface $joinPoint): string
     {
         /** @var string $result */
         $result = $joinPoint->getAdviceChain()->proceed($joinPoint);
@@ -48,6 +49,10 @@ public function appendTrailingSlashToNodeUri(JoinPointInterface $joinPoint): str
             return $result;
         }
 
-        return (string)$this->trailingSlashHelper->appendTrailingSlash($uri);
+        if ($this->configurationHelper->getTrailingSlashMode() === TrailingSlashModeEnum::ADD) {
+            return (string)$this->trailingSlashHelper->appendTrailingSlash($uri);
+        }
+
+        return (string)$this->trailingSlashHelper->removeTrailingSlash($uri);
     }
 }

Classes/RoutingMiddleware.php

@@ -4,6 +4,7 @@
 
 namespace Flowpack\SeoRouting;
 
+use Flowpack\SeoRouting\Enum\TrailingSlashModeEnum;
 use Flowpack\SeoRouting\Helper\BlocklistHelper;
 use Flowpack\SeoRouting\Helper\ConfigurationHelper;
 use Flowpack\SeoRouting\Helper\LowerCaseHelper;
@@ -50,7 +51,10 @@ public function process(ServerRequestInterface $request, RequestHandlerInterface
         $oldPath = $uri->getPath();
 
         if ($isTrailingSlashEnabled) {
-            $uri = $this->trailingSlashHelper->appendTrailingSlash($uri);
+            match ($this->configurationHelper->getTrailingSlashMode()) {
+                TrailingSlashModeEnum::ADD => $uri = $this->trailingSlashHelper->appendTrailingSlash($uri),
+                TrailingSlashModeEnum::REMOVE => $uri = $this->trailingSlashHelper->removeTrailingSlash($uri),
+            };
         }
 
         if ($isToLowerCaseEnabled) {

Configuration/Settings.yaml

@@ -4,6 +4,7 @@ Flowpack:
       enable:
         trailingSlash: true
         toLowerCase: false
+      trailingSlashMode: 'add'
       statusCode: 301
     blocklist:
       '/neos.*': true

README.md

@@ -9,6 +9,7 @@
     * [Installation](#installation)
     * [Configuration](#configuration)
         * [Standard Configuration](#standard-configuration)
+        * [Trailing slash mode](#trailing-slash-mode)
         * [Blocklist for redirects](#blocklist-for-redirects)
     * [Thank you](#thank-you)
 
@@ -20,15 +21,15 @@ Thank you [Biallo & Team GmbH](https://www.biallo.de/) for sponsoring the work f
 
 ## Introduction
 
-This package allows you to enforce a trailing slash and/or lower case urls in Flow/Neos.
+This package allows you to enforce a trailing slash or enforce no trailing slash and/or lower case urls in Flow/Neos.
 
 ## Features
 
-This package has 2 main features:
+Main features:
 
 - **trailingSlash**: ensure that all rendered internal links in the frontend end with a trailing slash (e.g. `example.
 com/test/` instead of `example.com/test`) and all called URLs without trailing slash will be redirected to the same
-  page with a trailing slash
+  page with a trailing slash or the opposite (e.g. `example.com/test` instead of `example.com/test/`)
 - **toLowerCase**: ensure that camelCase links gets redirected to lowercase (e.g. `example.com/lowercase` instead of
   `example.com/lowerCase`)
 
@@ -68,11 +69,19 @@ Flowpack:
       enable:
         trailingSlash: true
         toLowerCase: false
+      trailingSlashMode: 'add'  
       statusCode: 301
     blocklist:
       '/neos.*': true
 ```
 
+### Trailing slash mode
+
+You can set the `trailingSlashMode` to `add` or `remove`. For this setting to have an effect you have to set
+`trailingSlash` to true.
+
+This effects redirects and all rendered internal urls.
+
 ### Blocklist for redirects
 
 By default, all `/neos` URLs are ignored for redirects. You can extend the blocklist array with regex as you like:

Tests/Unit/Helper/ConfigurationHelperTest.php

@@ -4,6 +4,7 @@
 
 namespace Flowpack\SeoRouting\Tests\Unit\Helper;
 
+use Flowpack\SeoRouting\Enum\TrailingSlashModeEnum;
 use Flowpack\SeoRouting\Helper\ConfigurationHelper;
 use PHPUnit\Framework\Attributes\CoversClass;
 use PHPUnit\Framework\TestCase;
@@ -38,6 +39,20 @@ public function testIsTrailingSlashEnabledShouldReturnFalse(): void
         self::assertFalse($this->configurationHelper->isTrailingSlashEnabled());
     }
 
+    public function testGetTrailingSlashModeShouldReturnGivenMode(): void
+    {
+        $this->injectConfiguration(['trailingSlashMode' => 'remove']);
+
+        self::assertSame(TrailingSlashModeEnum::REMOVE, $this->configurationHelper->getTrailingSlashMode());
+    }
+
+    public function testGetTrailingSlashModeShouldReturnDefaultMode(): void
+    {
+        $this->injectConfiguration(['trailingSlashMode' => 'foo']);
+
+        self::assertSame(TrailingSlashModeEnum::ADD, $this->configurationHelper->getTrailingSlashMode());
+    }
+
     public function testIsToLowerCaseEnabledShouldReturnTrue(): void
     {
         $this->injectConfiguration(['enable' => ['trailingSlash' => false, 'toLowerCase' => true]]);
@@ -76,7 +91,7 @@ public function testGetStatusCodeShouldReturnConfiguredValue(): void
     }
 
     /**
-     * @param  array{enable: array{trailingSlash: bool, toLowerCase: bool}, statusCode?: int}|array{}  $configuration
+     * @param  array{enable?: array{trailingSlash: bool, toLowerCase: bool}, statusCode?: int, trailingSlashMode?: string}|array{}  $configuration
      */
     private function injectConfiguration(array $configuration): void
     {

Tests/Unit/Helper/TrailingSlashHelperTest.php

@@ -13,18 +13,26 @@
 #[CoversClass(TrailingSlashHelper::class)]
 class TrailingSlashHelperTest extends TestCase
 {
-    #[DataProvider('urlDataProvider')]
+    #[DataProvider('urlDataProviderForAppendTrailingSlash')]
     public function testAppendTrailingSlash(string $input, string $output): void
     {
         $uri = new Uri($input);
 
         self::assertSame($output, (string)(new TrailingSlashHelper())->appendTrailingSlash($uri));
     }
 
+    #[DataProvider('urlDataProviderForRemoveTrailingSlash')]
+    public function testRemoveTrailingSlash(string $input, string $output): void
+    {
+        $uri = new Uri($input);
+
+        self::assertSame($output, (string)(new TrailingSlashHelper())->removeTrailingSlash($uri));
+    }
+
     /**
      * @return array{string[]}
      */
-    public static function urlDataProvider(): array
+    public static function urlDataProviderForAppendTrailingSlash(): array
     {
         return [
             ['', ''],
@@ -47,4 +55,31 @@ public static function urlDataProvider(): array
             ['https://test.de/foo/bar.css', 'https://test.de/foo/bar.css'],
         ];
     }
+
+    /**
+     * @return array{string[]}
+     */
+    public static function urlDataProviderForRemoveTrailingSlash(): array
+    {
+        return [
+            ['', ''],
+            ['/', ''],
+            ['/foo/', '/foo'],
+            ['/foo/bar/', '/foo/bar'],
+            ['https://test.de', 'https://test.de'],
+            ['https://test.de', 'https://test.de'],
+            ['https://test.de/foo/bar/', 'https://test.de/foo/bar'],
+            ['https://test.de/foo/bar', 'https://test.de/foo/bar'],
+            ['/foo/bar/?some-query=foo%20bar', '/foo/bar?some-query=foo%20bar'],
+            ['/foo/bar/#some-fragment', '/foo/bar#some-fragment'],
+            ['/foo/bar/?some-query=foo%20bar#some-fragment', '/foo/bar?some-query=foo%20bar#some-fragment'],
+            [
+                'https://test.de/foo/bar/?some-query=foo%20bar#some-fragment',
+                'https://test.de/foo/bar?some-query=foo%20bar#some-fragment',
+            ],
+            ['mailto:some.email@foo.bar', 'mailto:some.email@foo.bar'],
+            ['tel:+4906516564', 'tel:+4906516564'],
+            ['https://test.de/foo/bar.css', 'https://test.de/foo/bar.css'],
+        ];
+    }
 }

Tests/Unit/LinkingServiceAspectTest.php

@@ -4,6 +4,7 @@
 
 namespace Flowpack\SeoRouting\Tests\Unit;
 
+use Flowpack\SeoRouting\Enum\TrailingSlashModeEnum;
 use Flowpack\SeoRouting\Helper\BlocklistHelper;
 use Flowpack\SeoRouting\Helper\ConfigurationHelper;
 use Flowpack\SeoRouting\Helper\TrailingSlashHelper;
@@ -61,7 +62,7 @@ public function testAppendTrailingSlashToNodeUriShouldNotChangeResultIfTrailingS
 
         assertSame(
             $result,
-            $this->linkingServiceAspect->appendTrailingSlashToNodeUri($this->joinPointMock)
+            $this->linkingServiceAspect->handleTrailingSlashForNodeUri($this->joinPointMock)
         );
     }
 
@@ -74,7 +75,7 @@ public function testAppendTrailingSlashToNodeUriShouldNotChangeResultIfUriIsMalf
 
         assertSame(
             $result,
-            $this->linkingServiceAspect->appendTrailingSlashToNodeUri($this->joinPointMock)
+            $this->linkingServiceAspect->handleTrailingSlashForNodeUri($this->joinPointMock)
         );
     }
 
@@ -89,24 +90,47 @@ public function testAppendTrailingSlashToNodeUriShouldNotChangeResultIfUriIsInBl
 
         assertSame(
             $result,
-            $this->linkingServiceAspect->appendTrailingSlashToNodeUri($this->joinPointMock)
+            $this->linkingServiceAspect->handleTrailingSlashForNodeUri($this->joinPointMock)
         );
     }
 
-    public function testAppendTrailingSlashToNodeUriShouldChangeResult(): void
+    public function testAppendTrailingSlashToNodeUriShouldAppendTrailingSlash(): void
     {
         $result = 'foo/';
         $this->adviceChainMock->expects($this->once())->method('proceed')->willReturn('foo');
 
         $this->configurationHelperMock->expects($this->once())->method('isTrailingSlashEnabled')->willReturn(true);
+        $this->configurationHelperMock->expects($this->once())->method('getTrailingSlashMode')->willReturn(
+            TrailingSlashModeEnum::ADD
+        );
         $this->blocklistHelperMock->expects($this->once())->method('isUriInBlocklist')->willReturn(false);
         $this->trailingSlashHelperMock->expects($this->once())->method('appendTrailingSlash')->willReturn(
             new Uri($result)
         );
 
         assertSame(
             $result,
-            $this->linkingServiceAspect->appendTrailingSlashToNodeUri($this->joinPointMock)
+            $this->linkingServiceAspect->handleTrailingSlashForNodeUri($this->joinPointMock)
+        );
+    }
+
+    public function testAppendTrailingSlashToNodeUriShouldRemoveTrailingSlash(): void
+    {
+        $result = 'foo/';
+        $this->adviceChainMock->expects($this->once())->method('proceed')->willReturn('foo');
+
+        $this->configurationHelperMock->expects($this->once())->method('isTrailingSlashEnabled')->willReturn(true);
+        $this->configurationHelperMock->expects($this->once())->method('getTrailingSlashMode')->willReturn(
+            TrailingSlashModeEnum::REMOVE
+        );
+        $this->blocklistHelperMock->expects($this->once())->method('isUriInBlocklist')->willReturn(false);
+        $this->trailingSlashHelperMock->expects($this->once())->method('removeTrailingSlash')->willReturn(
+            new Uri($result)
+        );
+
+        assertSame(
+            $result,
+            $this->linkingServiceAspect->handleTrailingSlashForNodeUri($this->joinPointMock)
         );
     }
 }