From 511d99598145c1931f748f49f16f94a7e944b706 Mon Sep 17 00:00:00 2001
From: Josh Bruce <josh@8fold.pro>
Date: Thu, 28 Oct 2021 06:51:01 -0500
Subject: [PATCH] added 405 response

The site only allows GET requests.
---
 public/index.php                    | 33 ++++++++++++++++++++++++-----
 setup-errors/405.md                 | 12 +++++++++++
 {500-errors => setup-errors}/500.md |  0
 {500-errors => setup-errors}/502.md |  0
 src/Server.php                      | 14 ++++++++++++
 tests/ServerTest.php                | 13 ++++++++++++
 6 files changed, 67 insertions(+), 5 deletions(-)
 create mode 100644 setup-errors/405.md
 rename {500-errors => setup-errors}/500.md (100%)
 rename {500-errors => setup-errors}/502.md (100%)

diff --git a/public/index.php b/public/index.php
index 88e5dd88..9e20c722 100644
--- a/public/index.php
+++ b/public/index.php
@@ -22,7 +22,7 @@
 $server = JoshBruce\Site\Server::init($_SERVER);
 
 if ($server->isMissingRequiredValues()) {
-    $content = JoshBruce\Site\Content::init($projectRoot, 0, '/500-errors')
+    $content = JoshBruce\Site\Content::init($projectRoot, 0, '/setup-errors')
         ->for('/500.md');
 
     JoshBruce\Site\Emitter::emitWithResponse(
@@ -43,11 +43,34 @@
 }
 
 /**
- * Verifying specified content area exists.
+ * Verifying the method is supported by the app
  */
+if ($server->isUsingUnsupportedMethod()) {
+    $content = JoshBruce\Site\Content::init($projectRoot, 0, '/setup-errors')
+        ->for('/405.md');
 
-// TESTING
-// $_SERVER['CONTENT_FOLDER'] = '/does/not/exist';
+    JoshBruce\Site\Emitter::emitWithResponse(
+        405,
+        [
+            'Cache-Control' => [
+                'no-cache',
+                'must-revalidate'
+            ],
+            'Allow' => $server->supportedMethods()
+        ],
+        Eightfold\HTMLBuilder\Document::create(
+                $markdownConverter->getFrontMatter($content->markdown())['title']
+            )->body(
+                $markdownConverter->convert($content->markdown())
+            )->build()
+    );
+    exit;
+}
+
+
+/**
+ * Verifying specified content area exists.
+ */
 $content = JoshBruce\Site\Content::init(
     $projectRoot,
     $server->contentUp(),
@@ -55,7 +78,7 @@
 );
 
 if ($content->folderIsMissing()) {
-    $content = JoshBruce\Site\Content::init($projectRoot, 0, '/500-errors')
+    $content = JoshBruce\Site\Content::init($projectRoot, 0, '/setup-errors')
         ->for('/502.md');
 
     JoshBruce\Site\Emitter::emitWithResponse(
diff --git a/setup-errors/405.md b/setup-errors/405.md
new file mode 100644
index 00000000..94b07c38
--- /dev/null
+++ b/setup-errors/405.md
@@ -0,0 +1,12 @@
+---
+title: Unsupported method
+usage: The request is using an Unsupported method.
+---
+
+# 405: Unsupported method
+
+We cannot support that type of request.
+
+Please try again later.
+
+If this error persists, please contact [Josh Bruce](https://github.com/joshbruce).
diff --git a/500-errors/500.md b/setup-errors/500.md
similarity index 100%
rename from 500-errors/500.md
rename to setup-errors/500.md
diff --git a/500-errors/502.md b/setup-errors/502.md
similarity index 100%
rename from 500-errors/502.md
rename to setup-errors/502.md
diff --git a/src/Server.php b/src/Server.php
index b0a456bc..c7ebe4c3 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -51,6 +51,20 @@ public function isMissingRequiredValues(): bool
         return false;
     }
 
+    public function isUsingUnsupportedMethod(): bool
+    {
+        $requestMethod = $this->serverGlobals['REQUEST_METHOD'];
+        return ! in_array($requestMethod, $this->supportedMethods());
+    }
+
+    /**
+     * @return string[] [description]
+     */
+    public function supportedMethods(): array
+    {
+        return ['GET'];
+    }
+
     public function contentUp(): int
     {
         return intval($this->serverGlobals['CONTENT_UP']);
diff --git a/tests/ServerTest.php b/tests/ServerTest.php
index a088e784..16b75e97 100644
--- a/tests/ServerTest.php
+++ b/tests/ServerTest.php
@@ -2,6 +2,19 @@
 
 use JoshBruce\Site\Server;
 
+it('limits request methods', function() {
+    expect(
+        Server::init(serverGlobals())->isUsingUnsupportedMethod()
+    )->toBeFalse();
+
+    $serverGlobals = serverGlobals();
+    $serverGlobals['REQUEST_METHOD'] = 'INVALID';
+
+    expect(
+        Server::init($serverGlobals)->isUsingUnsupportedMethod()
+    )->toBeTrue();
+})->group('server');
+
 it('has required variables', function() {
     expect(
         Server::init(serverGlobals())->isMissingRequiredValues()