Feat/excel (#45)

* add dependency

adding dependency to parse the excel file in the node side

* import file

ability to import file
- add extension
- safeguard file type and size

* user is able to upload json or excel

* chore: extract logic into self contained function

* associate model with version

* test id generation

* parse excel data

* prevent UI crash on bad data

* extract validation into self contained function

* chore: add more tests for bad data

* config: stop from opening browser on start

* fix comma in sample db

* handle corrupt files

* error boundary around main components

* jsdocs

* increase id length

* parse excel time string

* feat: excel parsing

* validate json db before import

* chore: test event validator

* feat: make function to clean convert strings

* chore: test parser

* chore: jsdocs

* fix: bug on upload

prevent bug where the component would prevent upload of same file twice

server/src/utils/upload.js

@@ -1,6 +1,8 @@
 import multer from 'multer';
 import { statSync, mkdirSync } from 'fs';
+import { EXCEL_MIME, JSON_MIME } from './parser.js';
 
+// Define multer storage object
 const storage = multer.diskStorage({
   destination: function (req, file, cb) {
     let newDestination = 'uploads/';
@@ -12,9 +14,7 @@ const storage = multer.diskStorage({
     }
     if (stat && !stat.isDirectory()) {
       throw new Error(
-        'Directory cannot be created because an inode of a different type exists at "' +
-          dest +
-          '"'
+        `Directory cannot be created because an inode of a different type exists at ${newDestination}`
       );
     }
     cb(null, newDestination);
@@ -24,15 +24,22 @@ const storage = multer.diskStorage({
   },
 });
 
-// filter only json
-const filterJson = (req, file, cb) => {
-  if (file.mimetype.includes('application/json')) {
+/**
+ * @description Middleware function to filter allowed file types
+ * @argument file - reference to file
+ * @return {boolean} - file allowed
+ */
+const filterAllowed = (req, file, cb) => {
+  if (file.mimetype.includes(JSON_MIME) || file.mimetype.includes(EXCEL_MIME)) {
     cb(null, true);
   } else {
+    console.log('ERROR: Unrecognised file type');
     cb(null, false);
   }
 };
 
-const uploadJson = multer({ storage: storage, fileFilter: filterJson });
-
-export default uploadJson.single('jsondb');
+// Build multer uploader for a single file
+export const uploadFile = multer({
+  storage: storage,
+  fileFilter: filterAllowed,
+}).single('userFile');