modeht
85 lines
2.5 KiB
JavaScript
85 lines
2.5 KiB
JavaScript
const multer = require('multer');
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const converter = require('json-2-csv');
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const fs = require('fs');
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const path = require('path');
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const csv = require('fast-csv');
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const db = require('./../models');
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const upload_folder = path.resolve(__dirname, '../uploads');
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module.exports = {
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/**
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* Import CSV file
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* @param {request} req
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* @param {response} res
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*/
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csv_preview: function (req, res) {
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return new Promise((resolve, reject) => {
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const upload = multer({ dest: path.resolve(upload_folder) }).single('file');
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upload(req, res, async function (error) {
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if (error) {
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reject(error);
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}
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let data = [];
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fs.createReadStream(path.resolve(upload_folder, req.file.path))
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.pipe(csv.parse())
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.on('error', (error) => reject(error))
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.on('data', (row) => {
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data.push(row);
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})
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.on('end', (rowCount) => {
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fs.unlinkSync(path.resolve(upload_folder, req.file.path));
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console.log(`Parsed ${rowCount} rows`);
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resolve(data);
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});
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});
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});
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},
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csv_import: async function (req, res) {
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return new Promise((resolve, reject) => {
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const table = req.params.model;
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const upload = multer({ dest: path.resolve(upload_folder) }).single('file');
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let data = [];
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upload(req, res, async function (error) {
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if (error) {
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throw new Error(error);
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}
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fs.createReadStream(path.resolve(upload_folder, req.file.path))
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.pipe(csv.parse({ headers: true }))
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.on('error', (error) => reject(error))
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.on('data', (row) => {
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data.push(row);
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})
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.on('end', async (rowCount) => {
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fs.unlinkSync(path.resolve(upload_folder, req.file.path));
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console.log(`Parsed ${rowCount} rows`);
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await db[table].batchInsert(data).catch((error) => {
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console.log(error);
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reject(error);
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});
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resolve(data);
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});
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});
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});
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},
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/**
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* Export CSV file
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* @param {request} req
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* @param {response} res
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*/
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csv_export: async function (req, res) {
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try {
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let fields = await db[req.table].getAll(req.where);
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fields = JSON.stringify(fields); // do this needed?
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const csv = await converter.json2csvAsync(fields);
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res.header('Content-Type', 'text/csv');
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res.attachment(req.table + '.csv');
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return res.send(csv);
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} catch (error) {
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console.log(error);
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}
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},
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};
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