xsheetjs/demos/database/FirebaseTest.js

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/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
/* eslint-env node */
const XLSX = require('xlsx');
const assert = require('assert');
const Firebase = require('firebase-admin');
const config = {
credential: {
getAccessToken: () => ({
expires_in: 0,
access_token: '',
}),
},
databaseURL: 'ws://localhost:5555'
};
/* make new workbook object from CSV */
const wb = XLSX.read('a,b,c\n1,2,3', {type:"binary", raw:true});
let P = Promise.resolve("sheetjs");
/* Connect to Firebase server and initialize collection */
P = P.then(async () => {
Firebase.initializeApp(config);
const database = Firebase.database();
await database.ref('foo').set(null);
return [database];
});
/* Insert entire workbook object into `foo` ref */
P = P.then(async ([database]) => {
await database.ref('foo').set(wb);
return [database];
});
/* Change cell A1 of Sheet1 to "J" and change A2 to 5 */
P = P.then(async ([database]) => {
database.ref('foo').update({
"Sheets/Sheet1/A1": {"t": "s", "v": "J"},
"Sheets/Sheet1/A2": {"t": "n", "v": 5},
});
return [database];
});
/* Write to file */
P = P.then(async ([database]) => {
const val = await database.ref('foo').once('value');
const wb = await val.val();
XLSX.writeFile(wb, "firebase.xlsx");
const ws = XLSX.readFile("firebase.xlsx").Sheets.Sheet1;
const csv = XLSX.utils.sheet_to_csv(ws);
assert.equal(csv, "J,b,c\n5,2,3\n");
console.log(csv);
return [database];
});
/* Close connection */
P = P.then(async ([database]) => { database.app.delete(); });