renaming note_tree to branch

src/entities/branch.js

@@ -0,0 +1,18 @@
+"use strict";
+
+const Entity = require('./entity');
+
+class Branch extends Entity {
+    static get tableName() { return "branches"; }
+    static get primaryKeyName() { return "branchId"; }
+
+    async getNote() {
+        return this.repository.getEntity("SELECT * FROM branches WHERE isDeleted = 0 AND noteId = ?", [this.noteId]);
+    }
+
+    async getParentNote() {
+        return this.repository.getEntity("SELECT * FROM branches WHERE isDeleted = 0 AND parentNoteId = ?", [this.parentNoteId]);
+    }
+}
+
+module.exports = Branch;