From b51d8c76dd49f6474c1299742ff9d41462fa9dca Mon Sep 17 00:00:00 2001
From: Daniel Weipert <code@drogueronin.de>
Date: Wed, 22 Nov 2023 17:39:59 +0100
Subject: [DocumentServer] add directory listing

---
 src/Server/RequestHandlers/DocumentServer.php | 32 ++++++++++++++++++++++++---
 test/server.php                               |  5 ++++-
 test/sub/index.gmi                            |  3 ---
 test/sub/sub.txt                              |  1 +
 4 files changed, 34 insertions(+), 7 deletions(-)
 delete mode 100644 test/sub/index.gmi
 create mode 100644 test/sub/sub.txt

diff --git a/src/Server/RequestHandlers/DocumentServer.php b/src/Server/RequestHandlers/DocumentServer.php
index 37a3bd6..e55a891 100644
--- a/src/Server/RequestHandlers/DocumentServer.php
+++ b/src/Server/RequestHandlers/DocumentServer.php
@@ -11,17 +11,28 @@ use function GeminiFoundation\mime_content_type;
 class DocumentServer implements RequestHandlerInterface
 {
   protected string $documentRoot;
+  protected string $indexFile;
+  protected bool $useDirectoryListing;
 
-  public function __construct(string $documentRoot = '')
+  public function __construct(
+    string $documentRoot = '',
+    string $indexFile = 'index.gmi',
+    bool $useDirectoryListing = false
+  )
   {
     $this->documentRoot = $documentRoot ?: getcwd();
+    $this->indexFile = $indexFile;
+    $this->useDirectoryListing = $useDirectoryListing;
   }
 
   public function __invoke(Response $response, Request $request): Response
   {
-    $documentPath = $this->documentRoot . urldecode($request->getPath());
+    $requestPath = $this->trim(urldecode($request->getPath()));
+    $filePath = $this->documentRoot . $requestPath;
+
+    $documentPath = $filePath;
     if (! is_file($documentPath)) {
-      $documentPath = $this->documentRoot . $request->getPath() . '/index.gmi';
+      $documentPath = $filePath . '/' . $this->indexFile;
     }
 
     if (is_file($documentPath)) {
@@ -30,10 +41,25 @@ class DocumentServer implements RequestHandlerInterface
 
       $response->setStatusCode(Status::SUCCESS);
       $response->setMeta(mime_content_type($documentPath) . '; charset=utf-8');
+    } else if ($this->useDirectoryListing && is_dir($filePath)) {
+      $body = '';
+      foreach (scandir($filePath) as $fileName) {
+        $link = implode('/', array_map('urlencode', explode('/', "$requestPath/$fileName")));
+        $body .= "=> $link $fileName \r\n";
+      }
+
+      $response->setBody($body);
+      $response->setStatusCode(Status::SUCCESS);
+      $response->setMeta('text/gemini; charset=utf-8');
     } else {
       $response->setStatusCode(Status::NOT_FOUND);
     }
 
     return $response;
   }
+
+  private function trim(string $string)
+  {
+    return str_ends_with($string, '/') ? substr($string, offset: 0, length: -1) : $string;
+  }
 }
diff --git a/test/server.php b/test/server.php
index c90942a..adc9d05 100644
--- a/test/server.php
+++ b/test/server.php
@@ -13,6 +13,9 @@ $server = new Server(
   ],
 );
 
-$server->onRequest(new DocumentServer(__DIR__));
+$server->onRequest(new DocumentServer(
+  documentRoot: __DIR__,
+  useDirectoryListing: true
+));
 
 $server->listen();
diff --git a/test/sub/index.gmi b/test/sub/index.gmi
deleted file mode 100644
index 193cc4d..0000000
--- a/test/sub/index.gmi
+++ /dev/null
@@ -1,3 +0,0 @@
-subfolder
-
-=> /
diff --git a/test/sub/sub.txt b/test/sub/sub.txt
new file mode 100644
index 0000000..371b205
--- /dev/null
+++ b/test/sub/sub.txt
@@ -0,0 +1 @@
+textcontent
-- 
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