Replace TCPDI by TCPDF

TCPDI have problems when manipulate the original PDF file. The approach
to add footer at PDF files was replaced by create an overlay to each
page and merge with original PDF file.

Signed-off-by: Vitor Mattos <vitor@php.rio>

composer.json

@@ -5,13 +5,12 @@
   "license": "AGPL",
   "require": {
     "endroid/qr-code": "^4.6",
-    "iio/libmergepdf": "dev-move-tcpdi-parser-to-package",
     "jsignpdf/jsignpdf-php": "^1.2",
     "mikehaertl/php-pdftk": "^0.13.0",
     "pagerfanta/pagerfanta": "^3.6",
     "smalot/pdfparser": "^2.4",
     "symfony/console": "^5.4",
-    "tecnickcom/tcpdf": "^6.4",
+    "tecnickcom/tcpdf": "^6.7",
     "wobeto/email-blur": "^1.0"
   },
   "require-dev": {
@@ -62,11 +61,5 @@
     "psr-4": {
       "OCP\\": "vendor/nextcloud/ocp/OCP"
     }
-  },
-  "repositories": [
-    {
-      "type": "vcs",
-      "url": "https://github.com/LibreCodeCoop/libmergepdf"
-    }
-  ]
+  }
 }

lib/Db/File.php

@@ -25,6 +25,7 @@
 namespace OCA\Libresign\Db;
 
 use OCP\AppFramework\Db\Entity;
+use stdClass;
 
 /**
  * @method void setId(int $id)
@@ -45,8 +46,7 @@
  * @method string getCallback()
  * @method void setStatus(int $status)
  * @method int getStatus()
- * @method void setPages(int $pages)
- * @method int getPages()
+ * @method string getMetadata()
  */
 class File extends Entity {
 	/** @var integer */
@@ -97,4 +97,16 @@ public function __construct() {
 		$this->addType('status', 'integer');
 		$this->addType('metadata', 'string');
 	}
+
+	public function setMetadata($metadata): void {
+		if (is_array($metadata)) {
+			$metadata = json_encode($metadata);
+		}
+		$this->metadata = (string) $metadata;
+		$this->markFieldUpdated('metadata');
+	}
+
+	public function getMetadataDecoded(): ?stdClass {
+		return json_decode($this->metadata);
+	}
 }

lib/Db/SignRequestMapper.php

@@ -69,9 +69,6 @@ public function incrementNotificationCounter(SignRequest $signRequest, string $m
 		try {
 			$fromDatabase = $this->getById($signRequest->getId());
 			$metadata = $fromDatabase->getMetadata();
-			if (!empty($metadata)) {
-				$metadata = json_decode($metadata, true);
-			}
 			if (!isset($metadata['notify'])) {
 				$this->firstNotification = true;
 			}