100 lines
2.5 KiB
JavaScript
100 lines
2.5 KiB
JavaScript
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const XLSX = require("xlsx");
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const fs = require("fs");
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// do export for excel to json output or data json object
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function _internalExport() {
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const NAME = process.env.APP_NAME || "excel2json";
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console.log("APP NAME =>", NAME, "\n");
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// load from env
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const INPUT_FILE = process.env.INPUT_FILE || "./data/people.xlsx";
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const OUTPUT_PATH = process.env.OUTPUT_PATH || "./data/outputs";
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const MAPPER_FILE = process.env.MAPPER_FILE || "./data/mapper.json";
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const SHEET_NAME = process.env.SHEET_NAME || "Sheet1";
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const ENCODING = process.env.ENCODING || "utf-8";
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// get mapper in string
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var mapperString = undefined;
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try {
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mapperString = fs.readFileSync(
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MAPPER_FILE,
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{ encoding: ENCODING },
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(err) => {
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if (err) {
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console.error(err);
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}
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console.log("Load file suceed =>", MAPPER_FILE);
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}
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);
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} catch (err) {
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console.error("read file error", err);
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}
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// convert mapper from string to json object
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const mapperJson = mapperString ? JSON.parse(mapperString) : {};
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const configs = mapperJson.configs || {};
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const columsData = mapperJson.data || undefined;
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// read workbook from excel file
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const wb = XLSX.readFile(configs.inputFile || INPUT_FILE);
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const xlData = XLSX.utils.sheet_to_json(
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wb.Sheets[configs.sheetName || SHEET_NAME]
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);
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// mapping the data from read excel file
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const data = xlData.map((row) => {
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if (columsData == undefined || !columsData) {
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return row;
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}
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var _r = {};
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columsData.map((col) => {
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_r[col.label] = row[col.dataIndex];
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});
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return _r;
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});
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// parse a new path
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const outputPath = configs.outputPath || OUTPUT_PATH;
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// check directory and create it if not exist
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if (!fs.existsSync(outputPath)) {
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fs.mkdirSync(outputPath, { recursive: true });
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}
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// able to save to output or not (default is true)
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const saveToOutput = configs.saveToOutput || true;
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if (saveToOutput) {
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// json data output
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const jsonStringData = JSON.stringify(data);
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try {
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// write to file
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fs.writeFileSync(
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`${outputPath}/${
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configs.outputName || "exported"
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}_${new Date().getTime()}.json`,
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jsonStringData,
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(err) => {
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if (err) throw err;
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console.log("Write succeed!");
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}
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);
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} catch (err) {}
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}
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return data;
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}
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/**
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* excel2json
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* Allow to export data from excel to json object or output of json.
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*
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* @returns JSON Object of result
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*/
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module.exports = excel2json = () => {
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return _internalExport()
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}
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