calpine-node/examples/excel2json/index.js

52 lines
1.3 KiB
JavaScript

const XLSX = require("xlsx");
const fs = require("fs");
const NAME = process.env.APP_NAME || "excel2json";
console.log("App Name =>", NAME);
// load from env
const INPUT_FILE = process.env.INPUT_FILE || "./data/people.xlsx";
const OUTPUT_PATH = process.env.OUTPUT_PATH || "./data/outputs";
const MAPPER_FILE = process.env.MAPPER_FILE || "./data/mapper.json";
// get mapper in string
const mapperString = fs.readFileSync(
MAPPER_FILE,
{ encoding: "utf-8" },
(err) => {
if (err) throw err;
console.log("Load file suceed =>", MAPPER_FILE);
}
);
// convert mapper from string to json object
const mapperJson = JSON.parse(mapperString);
const columsData = mapperJson.data;
// read workbook from excel file
const wb = XLSX.readFile(INPUT_FILE);
const xlData = XLSX.utils.sheet_to_json(wb.Sheets["Sheet1"]);
// mapping the data from read excel file
const data = xlData.map((row) => {
var _r = {};
columsData.map((col) => {
_r[col.label] = row[col.dataIndex];
});
return _r;
});
console.log("Data read from excel and mapped\n", data);
// check directory and create it if not exist
if (!fs.existsSync(OUTPUT_PATH)) {
fs.mkdirSync(OUTPUT_PATH);
}
// write to file
fs.writeFile(`${OUTPUT_PATH}/people_${new Date().getTime()}.json`, JSON.stringify(data), (err) => {
if (err) throw err;
console.log("Write succeed!");
});