fix: Date format in sales/purchases APIs.

fix: Algorithm FIFO cost calculate method.

server/src/http/middleware/prettierMiddleware.ts

@@ -0,0 +1,35 @@
+import { camelCase, snakeCase } from 'lodash';
+
+/**
+ * create a middleware to change json format from snake case to camelcase in request
+ * then change back to snake case in response
+ *
+ */
+export default function createMiddleware() {
+  return function (req, res, next) {
+    /**
+     * camelize req.body
+     */
+    if (req.body && typeof req.body === 'object') {
+      req.body = camelCase(req.body);
+    }
+
+    /**
+     * camelize req.query
+     */
+    if (req.query && typeof req.query === 'object') {
+      req.query = camelCase(req.query);
+    }
+
+    /**
+     * wrap res.json()
+     */
+    const sendJson = res.json;
+
+    res.json = (data) => {
+      return sendJson.call(res, snakeCase(data));
+    }
+
+    return next();
+  }
+}