This is a Node.js and Browser module written in TypeScript that provides a utility for extracting data from an OFX file. The module can also format some of the data and retrieve specific parts of the file if requested.

You can install this module using the Node Package Manager (NPM) with the following command:

npm

npm install ofx-data-extractor

yarn

yarn add ofx-data-extractor

The Ofx class provides the following methods:

• fromBuffer(data: Buffer): Used to read files on the node. Returns the methods
• fromBlob(data: Blob): Used to read files in the browser. Returns the methods below.
• config(options: OfxConfig): Used for formatting the generated json.`
• getHeaders(): OFXMetaData: Returns the metadata section of the OFX file as an object.
• getBankTransferList(): Pick<BankTransferList, 'STRTTRN'>: Returns a list of bank transfer transactions as an object.
• getTransactionsSummary(): Object: Returns a summary of transactions for a bank statement as an object.
• getContent(): OfxStructure: Returns the OFX file content as an object.
• toJson(): OfxResponse: Returns the entire OFX file content as a JSON object.

The module provides a class called Ofx that can be used to extract and format data from an OFX file. Here's an example of how to use it:

import { Ofx } from 'ofx-data-extractor'

const data = 'OFXHEADER:100\nDATA:OFXSGML\nVERSION:102\n...'
const ofx = new Ofx(data) // works in node.js and browser

const headers = ofx.getHeaders()
console.log(headers)

const transactionsSummary = ofx.getTransactionsSummary()
console.log(transactionsSummary)

const bankTransferList = ofx.getBankTransferList()
console.log(bankTransferList)

const ofxResponse = ofx.toJson()
console.log(ofxResponse)

The Ofx class constructor takes in two arguments:

data: The OFX file content as a string or a Buffer. config: Optional configuration options for formatting the OFX data.

import { Ofx } from 'ofx-data-extractor'
import fs from 'fs'

const file = await fs.readFile('/path/to/file')
const ofx = await Ofx.fromBuffer(file)

const ofxResponse = ofx.toJson()
console.log(ofxResponse)

import { Ofx } from 'ofx-data-extractor'

function handleFile(event) {
    const ofx = Ofx.fromBlob(event.target.files[0])
    const ofxResponse = ofx.toJson()
    console.log(ofxResponse)
}

// tsx/jsx/html
<input type="file" onChange={handleFile} />

The Ofx (constructor and config method) class can be configured with the following options:

• formatDate: A function that takes in a date string and returns a formatted date string.
• fitId: A string that determines how the financial institution transaction ID is handled. Possible values are "separated" (the default) or "included".
• nativeTypes: A boolean value that determines whether numeric fields should be represented as numbers or strings in the resulting JSON object.