perf: Do not read worksheet twice

scrape/parse/v3.ts

@@ -15,7 +15,7 @@
 import fs from "fs";
 import parseAbsence from "../utils/parseAbsence.js"
 import parseTeachers from "../utils/parseTeachers.js"
-import ExcelJS, { Worksheet, Cell, Row } from "exceljs"
+import ExcelJS, { Worksheet, Cell, Row, Workbook } from "exceljs"
 import JSZip from "jszip";
 import { parseStringPromise } from "xml2js";
 
@@ -42,8 +42,6 @@ async function getThemeColors(filePath: string): Promise<ThemeColors | null> {
   const data = fs.readFileSync(filePath);
   const zip = await JSZip.loadAsync(data);
 
-  // list all files for debug
-
   const themeFile = zip.file("xl/theme/theme1.xml");
   if (!themeFile) {
     return null;
@@ -118,9 +116,7 @@ function resolveCellColor(cell: Cell, themeColors: ThemeColors | null) {
   return null;
 }
 
-export default async function parseV3(downloadedFilePath: string) {
-  const workbook = new ExcelJS.Workbook();
-  await workbook.xlsx.readFile(downloadedFilePath);
+export default async function parseV3(workbook: Workbook, downloadedFilePath: string) {
   const themeColors = await getThemeColors(downloadedFilePath);
 
   const teacherMap = await parseTeachers();