add clitor protocol viewer

src/Controller/ViewController.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace App\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+
+use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Request;
+
+class ViewController extends AbstractController
+{
+    #[Route(
+        '/view/{namespace}',
+        name: 'view_raw',
+        requirements:
+        [
+            'namespace' => '^N[A-z0-9]{33}$',
+        ],
+        methods:
+        [
+            'GET'
+        ]
+    )]
+    public function raw(
+        Request $request
+    ): Response
+    {
+        // Connect kevacoin
+        $client = new \Kevachat\Kevacoin\Client(
+            $this->getParameter('app.kevacoin.protocol'),
+            $this->getParameter('app.kevacoin.host'),
+            $this->getParameter('app.kevacoin.port'),
+            $this->getParameter('app.kevacoin.username'),
+            $this->getParameter('app.kevacoin.password')
+        );
+
+        // Detect clitor-is-protocol
+        if ($clitor = $client->kevaGet($request->get('namespace'), '_CLITOR_IS_'))
+        {
+            $reader = new \ClitorIsProtocol\Kevacoin\Reader(
+                $clitor['value']
+            );
+
+            if ($reader->valid())
+            {
+                if ($pieces = $client->kevaFilter($request->get('namespace')))
+                {
+                    if ($data = $reader->data($pieces))
+                    {
+                        $response = new Response();
+
+                        if ($mime = $reader->fileMime())
+                        {
+                            $response->headers->set(
+                                'Content-type',
+                                $mime
+                            );
+                        }
+
+                        if ($length = $reader->fileLength())
+                        {
+                            if ($length == strlen($data))
+                            {
+                                $response->headers->set(
+                                    'Content-length',
+                                    $length
+                                );
+                            }
+                        }
+
+                        if ($name = $reader->fileName())
+                        {
+                            $response->headers->set(
+                                'Content-Disposition',
+                                sprintf(
+                                    'inline; filename="%s";',
+                                    $name
+                                )
+                            );
+                        }
+
+                        $response->sendHeaders();
+
+                        return $response->setContent(
+                            $data
+                        );
+                    }
+                }
+            }
+        }
+
+        // Nothing to view by this namespace
+        throw $this->createNotFoundException();
+    }
+}