Upgrade to some new nextcloud standards

lib/Db/Note.php

@@ -0,0 +1,39 @@
+<?php
+namespace OCA\QuickNotes\Db;
+
+use JsonSerializable;
+
+use OCP\AppFramework\Db\Entity;
+
+class Note extends Entity implements JsonSerializable {
+
+	protected $title;
+	protected $content;
+	protected $timestamp;
+	protected $colorId;
+	protected $userId;
+	protected $sharedWith;
+	protected $isShared;
+	protected $tags;
+
+	protected $color;
+
+	public function setColor($color) {
+		$this->color = $color;
+	}
+
+	public function jsonSerialize() {
+		return [
+			'id' => $this->id,
+			'title' => $this->title,
+			'content' => $this->content,
+			'timestamp' => $this->timestamp,
+			'colorid' => $this->colorId,
+			'color' => $this->color,
+			'userid' => $this->userId,
+			'sharedwith' => $this->sharedWith,
+			'isshared' => $this->isShared,
+			'tags' => $this->tags
+		];
+	}
+}