Upgrade to some new nextcloud standards

lib/Db/TaskMapper.php

@@ -0,0 +1,23 @@
+<?php
+namespace OCA\QuickNotes\Db;
+
+use OCP\IDBConnection;
+use OCP\AppFramework\Db\Mapper;
+
+class TaskMapper extends Mapper {
+
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'quicknotes_tasks', '\OCA\QuickNotes\Db\Tasks');
+	}
+
+	public function find($id, $noteId) {
+		$sql = 'SELECT * FROM *PREFIX*quicknotes_tasks WHERE id = ? AND note_id = ?';
+		return $this->findEntity($sql, [$id, $noteId]);
+	}
+
+	public function findAll($noteId) {
+		$sql = 'SELECT * FROM *PREFIX*quicknotes_tasks WHERE note_id = ?';
+		return $this->findEntities($sql, [$noteId]);
+	}
+
+}