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5f5f0021db
no issue - support ends today - see https://github.com/nodejs/Release - removed `use strict`
58 lines
2.2 KiB
JavaScript
58 lines
2.2 KiB
JavaScript
const Promise = require('bluebird'),
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csvParser = require('csv-parser'),
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_ = require('lodash'),
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fs = require('fs-extra');
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module.exports = function readCSV(options) {
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var columnsToExtract = options.columnsToExtract || [],
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results = [], rows = [];
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return new Promise(function (resolve, reject) {
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var readFile = fs.createReadStream(options.path);
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readFile.on('err', function (err) {
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reject(err);
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})
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.pipe(csvParser())
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.on('data', function (row) {
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rows.push(row);
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})
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.on('end', function () {
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// If CSV is single column - return all values including header
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var headers = _.keys(rows[0]), result = {}, columnMap = {};
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if (columnsToExtract.length === 1 && headers.length === 1) {
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results = _.map(rows, function (value) {
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result = {};
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result[columnsToExtract[0].name] = value[headers[0]];
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return result;
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});
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// Add first row
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result = {};
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result[columnsToExtract[0].name] = headers[0];
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results = [result].concat(results);
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} else {
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// If there are multiple columns in csv file
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// try to match headers using lookup value
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_.map(columnsToExtract, function findMatches(column) {
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_.each(headers, function checkheader(header) {
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if (column.lookup.test(header)) {
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columnMap[column.name] = header;
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}
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});
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});
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results = _.map(rows, function evaluateRow(row) {
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var result = {};
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_.each(columnMap, function returnMatches(value, key) {
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result[key] = row[value];
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});
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return result;
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});
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}
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resolve(results);
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});
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});
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};
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