Nodejs library which helps with CSV file management.

The library acts as a lightwight database wih CSV files.

$ npm install --save csvman

/*** NodeJS script ***/
const CSV = require('csvman');

const fja = async () => {

  const csvOpts = {
    filePath: './appended_arr.csv',
    encoding: 'utf8',
    mode: 0o644,

    fields: ['url', 'name', 'size'], // only these fields will be effective
    fieldDelimiter: ',',
    fieldWrapper: '"',
    rowDelimiter: '\n'
  };
  const csv = new CSV(csvOpts);

  const rows = await csv.readRows(false); // all types will be string
  // const rows = await csv.readRows(true); // or just csv.readRows()
  console.log('rows in total:: ', rows.length);
  console.log(JSON.stringify(rows, null, 4));
};

fja();

const CSV = require('csvman);

const opts = {
  filePath: './input.csv',
  encoding: 'utf8',
  mode: '0664',
  fields: ['url', 'name'], // define active CSV fields
  fieldDelimiter: ',',
  fieldWrapper: '"',
  rowDelimiter: '\n'
}
const csv = new CSV(opts);

Create CSV file defined in opts.filePath if it does not exist. If the file exists, it is NOT MODIFIED.

Add fields into the CSV Header. Only if the file is empty.

Write multiple CSV rows. The rows argument is an array of objects. CAUTION: Old content will be overwritten when this method is used.

Append multiple CSV rows. The rows argument is an array of objects. New content will be added to the old content.

Read CSV rows and convert it in the array of objects. If convertType is true then fields will convert the type automatically, for example string '5' will become number 5. The default is true.

Find CSV row by query and update it with doc. The query is inspired by MongoDB queries so it can use.

$eq, $ne, $gt, $gte, $lt, $lte, $regex, $in, $exists

For example: {name: {$regex: /john/i}}

The doc is object whose properties are CSV fields. If the upsert is true insert a new row if the rows are not found by the query.

Find CSV rows by the query. Use MongoDb inspired queries.

Find and remove CSV rows by the query. Use MongoDb inspired queries. The returned value is the array of removed row objects.

Get fields array from the first (header) row.

The software licensed under AGPL-3.