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/time.js

@@ -1,3 +1,7 @@
+const mts = 1000; // millis to seconds
+const mtm = 1000 * 60; // millis to minutes
+const mth = 1000 * 60 * 60; // millis to hours
+
 /**
  * @description Converts milliseconds to string representing time
  * @param {number} ms - time in milliseconds
@@ -18,9 +22,9 @@ export const stringFromMillis = (
   const millis = Math.abs(ms);
 
   const showWith0 = (value) => (value < 10 ? `0${value}` : value);
-  const hours = showWith0(Math.floor(((millis / (1000 * 60 * 60)) % 60) % 24));
-  const minutes = showWith0(Math.floor((millis / (1000 * 60)) % 60));
-  const seconds = showWith0(Math.floor((millis / 1000) % 60));
+  const hours = showWith0(Math.floor(((millis / mth) % 60) % 24));
+  const minutes = showWith0(Math.floor((millis / mtm) % 60));
+  const seconds = showWith0(Math.floor((millis / mts) % 60));
 
   return showSeconds
     ? `${isNegative}${
@@ -28,3 +32,21 @@ export const stringFromMillis = (
       }${minutes}${delim}${seconds}`
     : `${isNegative}${parseInt(hours) ? `${hours}` : '00'}${delim}${minutes}`;
 };
+
+/**
+ * @description Converts an excel date to milliseconds
+ * @argument {string} excelDate - excel string date
+ * @returns {number} - time in millisenconds
+ */
+export const excelDateStringToMillis = (excelDate) => {
+  const date = new Date(excelDate);
+
+  if (date instanceof Date && !isNaN(date)) {
+    const h = date.getHours();
+    const m = date.getMinutes();
+    const s = date.getSeconds();
+
+    return h * mth + m * mtm + s * mts;
+  }
+  return null;
+};