All: Use Lerna to manage monorepo

packages/lib/services/rest/utils/requestFields.ts

@@ -0,0 +1,23 @@
+import { Request } from '../Api';
+const BaseItem = require('../../../models/BaseItem');
+
+function defaultFieldsByModelType(modelType:number):string[] {
+	const ModelClass = BaseItem.getClassByItemType(modelType);
+	const possibleFields = ['id', 'parent_id', 'title'];
+	const output = [];
+	for (const f of possibleFields) {
+		if (ModelClass.hasField(f)) output.push(f);
+	}
+	return output;
+}
+
+export default function(request:Request, modelType:number) {
+	const query = request.query;
+	if (!query || !query.fields) return defaultFieldsByModelType(modelType);
+	if (Array.isArray(query.fields)) return query.fields.slice();
+	const fields = query.fields
+		.split(',')
+		.map((f:string) => f.trim())
+		.filter((f:string) => !!f);
+	return fields.length ? fields : defaultFieldsByModelType(modelType);
+}