From 5ace25b3b8e74927bff68060fa80678f7c0fb9d4 Mon Sep 17 00:00:00 2001
From: Vincent LAURENT <vince.laurent@gmail.com>
Date: Wed, 31 Jul 2024 11:04:49 +0200
Subject: [PATCH] =?UTF-8?q?D=C3=A9localisation=20du=20code=20pour=20g?=
 =?UTF-8?q?=C3=A9n=C3=A9rer=20un=20pdf=20dans=20une=20classe?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app.php                    | 48 +++++-----------------------
 lib/PDFSignature.class.php | 64 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+), 40 deletions(-)
 create mode 100644 lib/PDFSignature.class.php

diff --git a/app.php b/app.php
index 9d0bb24..16a4d11 100644
--- a/app.php
+++ b/app.php
@@ -2,6 +2,7 @@
 
 setlocale(LC_ALL, "");
 require(__DIR__.'/lib/GPGCryptography.class.php');
+require(__DIR__.'/lib/PDFSignature.class.php');
 
 $f3 = require(__DIR__.'/vendor/fatfree/base.php');
 
@@ -256,7 +257,7 @@ function($f3) {
             $symmetricKey = "#" . $_COOKIE[$hash];
             $encryptor = new GPGCryptography($_COOKIE[$hash], $f3->get('PDF_STORAGE_PATH').$hash);
             if (!$encryptor->encrypt()) {
-                shell_exec("rm -rf $sharingFolder");
+                GPGCryptography::hardUnlink($sharingFolder);
                 $f3->error(500);
             }
         }
@@ -272,50 +273,17 @@ function($f3) {
     function($f3) {
         $f3->set('activeTab', 'sign');
         $hash = Web::instance()->slug($f3->get('PARAMS.hash'));
-        $symmetricKey = null;
-        if (isset($_COOKIE[$hash])) {
-            $symmetricKey = GPGCryptography::protectSymmetricKey($_COOKIE[$hash]);
-        }
-
-        $cryptor = new GPGCryptography($symmetricKey, $f3->get('PDF_STORAGE_PATH').$hash);
-        $sharingFolder = $cryptor->decrypt();
-        if ($sharingFolder == false) {
-            $f3->error(500, "PDF file could not be decrypted. Cookie encryption key might be missing.");
-        }
+        $symmetricKey = (isset($_COOKIE[$hash])) ? GPGCryptography::protectSymmetricKey($_COOKIE[$hash]) : null;
 
-        $files = scandir($sharingFolder);
-        $originalFile = $sharingFolder.'/original.pdf';
-        $finalFile = $sharingFolder.'/'.$f3->get('PARAMS.hash').uniqid().'.pdf';
-        $filename = $f3->get('PARAMS.hash').'.pdf';
-        if(file_exists($sharingFolder."/filename.txt")) {
-            $filename = file_get_contents($sharingFolder."/filename.txt");
-        }
-        $layers = [];
-        foreach($files as $file) {
-            if(strpos($file, 'svg.pdf') !== false) {
-                $layers[] = $sharingFolder.'/'.$file;
-            }
-        }
-        if (!$layers) {
-            Web::instance()->send($originalFile, null, 0, TRUE, $filename);
-        }
-        $filename = str_replace('.pdf', '_signe-'.count($layers).'x.pdf', $filename);
-        copy($originalFile, $finalFile);
-        $bufferFile =  $finalFile.".tmp";
-        foreach($layers as $layerFile) {
-            shell_exec(sprintf("pdftk %s multistamp %s output %s", $finalFile, $layerFile, $bufferFile));
-            rename($bufferFile, $finalFile);
-        }
-        Web::instance()->send($finalFile, null, 0, TRUE, $filename);
+        $pdfSignature = new PDFSignature($f3->get('PDF_STORAGE_PATH').$hash, $symmetricKey);
+        $pdf = $pdfSignature->getPDF();
+        Web::instance()->send($pdf[0], null, 0, TRUE, $pdf[1]);
 
         if($f3->get('DEBUG')) {
             return;
         }
-        if ($f3->get('PDF_STORAGE_PATH') != $sharingFolder && $cryptor->isEncrypted()) {
-            GPGCryptography::hardUnlink($sharingFolder);
-        } else {
-            array_map('unlink', glob($finalFile."*"));
-        }
+
+        $pdfSignature->clean();
     }
 );
 
diff --git a/lib/PDFSignature.class.php b/lib/PDFSignature.class.php
new file mode 100644
index 0000000..e0c8848
--- /dev/null
+++ b/lib/PDFSignature.class.php
@@ -0,0 +1,64 @@
+<?php
+
+class PDFSignature
+{
+    protected $symmetricKey = null;
+    protected $pathHash = null;
+    protected $hash = null;
+    protected $gpg = null;
+    protected $toClean = [];
+
+    public function __construct($pathHash, $symmetricKey = null) {
+        $this->symmetricKey = $symmetricKey;
+        $this->pathHash = $pathHash;
+        $this->hash = basename($this->pathHash);
+        $this->gpg = new GPGCryptography($symmetricKey, $pathHash);
+    }
+
+    public function getPDF() {
+        $sharingFolder = $this->gpg->decrypt();
+        if ($sharingFolder == false) {
+            throw new Exception( "PDF file could not be decrypted. Cookie encryption key might be missing.");
+        }
+        if ($this->pathHash != $sharingFolder && $this->gpg->isEncrypted()) {
+            $this->toClean[] = $sharingFolder;
+        }
+        $files = scandir($sharingFolder);
+        $originalFile = $sharingFolder.'/original.pdf';
+        $finalFile = $sharingFolder.'/'.$this->hash.uniqid().'.pdf';
+        $filename = $this->hash.'.pdf';
+        if(file_exists($sharingFolder."/filename.txt")) {
+            $filename = file_get_contents($sharingFolder."/filename.txt");
+        }
+        $layers = [];
+        foreach($files as $file) {
+            if(strpos($file, 'svg.pdf') !== false) {
+                $layers[] = $sharingFolder.'/'.$file;
+            }
+        }
+        if(!count($layers)) {
+            return [$originalFile, $filename];
+        }
+
+        $filename = str_replace('.pdf', '_signe-'.count($layers).'x.pdf', $filename);
+        copy($originalFile, $finalFile);
+        $bufferFile =  $finalFile.".tmp";
+        foreach($layers as $layerFile) {
+            shell_exec(sprintf("pdftk %s multistamp %s output %s", $finalFile, $layerFile, $bufferFile));
+            rename($bufferFile, $finalFile);
+        }
+
+        if ($this->pathHash == $sharingFolder && !$this->gpg->isEncrypted()) {
+            $this->toClean[] = $finalFile;
+        }
+
+        return [$finalFile, $filename];
+    }
+
+    public function clean() {
+        foreach($this->toClean as $path) {
+            GPGCryptography::hardUnlink($path);
+        }
+    }
+
+}