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const fs = require('fs') | |
const path = require('path') | |
function parseCsvLinesToArray(file) { | |
const matchLineBreak = /\r?\n/ | |
return file.toString().trim().split(matchLineBreak) | |
} | |
function composeMatchingCsvColumnRegex(csvColumns) { | |
const csvColumnToNamedCapturingGroup = (currentColumn, currentIndex, array) => { | |
const isLastIndex = currentIndex + 1 === array.length | |
const shouldAddSeparator = isLastIndex === false | |
return `(?<${currentColumn}>.+)${shouldAddSeparator ? ',' : ''}` | |
} | |
const matchCsvColumnStringPattern = csvColumns.map(csvColumnToNamedCapturingGroup).join("") | |
return new RegExp(matchCsvColumnStringPattern); | |
} | |
function convertCsvToJson(csvPath) { | |
const csvFile = fs.readFileSync(csvPath) | |
const csvFileAsArray = parseCsvLinesToArray(csvFile) | |
const [headerRow] = csvFileAsArray.splice(0, 1) | |
const csvColumns = headerRow.split(',') | |
const matchRowDataRegex = composeMatchingCsvColumnRegex(csvColumns) | |
return csvFileAsArray.map((currentRow) => { | |
const matchInfo = currentRow.match(matchRowDataRegex); | |
return matchInfo.groups | |
}) | |
} | |
function exportJsonFile(jsonCollection) { | |
const outputDirPath = path.join(__dirname, 'output') | |
if (!fs.existsSync(outputDirPath)) fs.mkdirSync(outputDirPath); | |
const outputPath = path.join(__dirname, 'output', 'mock.json') | |
fs.writeFileSync(outputPath, JSON.stringify(jsonCollection)) | |
console.log(`File available at:\n${outputPath}`); | |
} | |
const filePath = path.join(__dirname, 'data', 'data.csv') | |
const result = convertCsvToJson(filePath) | |
exportJsonFile(result) |
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