Upgrade to some new nextcloud standards

lib/Db/NoteTagMapper.php

@@ -0,0 +1,38 @@
+<?php
+namespace OCA\QuickNotes\Db;
+
+use OCP\IDBConnection;
+use OCP\AppFramework\Db\Mapper;
+
+class NoteTagMapper extends Mapper {
+
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'quicknotes_note_tags', '\OCA\QuickNotes\Db\NoteTag');
+	}
+
+	public function find($id, $userId) {
+		$sql = 'SELECT * FROM *PREFIX*quicknotes_note_tags WHERE id = ? AND user_id = ?';
+		return $this->findEntity($sql, [$id, $userId]);
+	}
+
+	public function findAll($userId) {
+		$sql = 'SELECT * FROM *PREFIX*quicknotes_note_tags WHERE user_id = ?';
+		return $this->findEntities($sql, [$userId]);
+	}
+
+	public function findNoteTag($userId, $noteId, $tagId) {
+		$sql = 'SELECT * FROM *PREFIX*quicknotes_note_tags WHERE user_id = ? AND note_id = ? AND tag_id = ?';
+		return $this->findEntity($sql, [$userId, $noteId, $tagId]);
+	}
+
+	public function noteTagExists($userId, $noteId, $tagId) {
+		$sql = 'SELECT * FROM *PREFIX*quicknotes_note_tags WHERE user_id = ? AND note_id = ? AND tag_id = ?';
+		try {
+			return $this->findEntities($sql, [$userId, $noteId, $tagId]);
+		} catch (DoesNotExistException $e) {
+			return false;
+		}
+		return true;
+	}
+
+}