Refactor with base actions methods

api/controllers/base/index.js

@@ -0,0 +1,61 @@
+/*
+ * Controller base actions
+ *
+ * This module contains base actions that follow
+ * a template for CRUD operations on a DB and (optionally)
+ * do custom things afterward to return a response.
+ */
+
+const validation = require(`../../validation`);
+const db = require(`../../db`);
+
+const createAction = async (req, res, config) => {
+	validation.validateOrThrow(config.validationSchema, req.body);
+
+	const key = config.getObjectKey();
+	let existingObject = await db.getByKey(key);
+	if (existingObject) {
+		throw customError(
+			`An object with key "${key}" already exists in the database.`,
+			400
+		);
+	}
+
+	const dbObject = config.buildDbObject(req.body);
+	await db.put(config.dbKind, dbObject);
+	const createdObject = await db.getByKey(key);
+
+	const responseBody = config.buildResponseBody(createdObject);	
+	res.json(responseBody);
+};
+
+const getByKeyAction = async (req, res, config) => {
+	validation.validateOrThrow(config.validationSchema, req.body);
+	const key = config.getObjectKey();
+	let existingObject = await db.getByKey(key);
+
+	if (!existingObject) {
+		return res
+			.status(404)
+			.send({ error: config.notFoundMessage });
+	}
+
+	const responseBody = config.buildResponseBody(existingObject);
+	res.json(responseBody);
+};
+
+/**
+ * Build a custom error
+ * @param {string} message Error message
+ * @param {number} code Error code, should be HTTP status code
+ */
+const customError = (message = "An error occurred.", code = 500) => {
+	const error = new Error(message);
+	error.code = code;
+	return error;
+};
+
+module.exports = {
+	createAction,
+	getByKeyAction,
+};