Zazama / node-id3

import { FrameBuilder } from "../FrameBuilder"

import { FrameReader } from "../FrameReader"

import { isString } from '../util'

import type { Data } from "./type"

export const USLT = {

    create: (data: Data) => {

        data = data || {}

        if(isString(data)) {

            data = {

                text: data

            }

        }

        if(!data.text) {

            return null

        }

        return new FrameBuilder("USLT")

            .appendNumber(0x01, 1)

            .appendValue(data.language)

            .appendNullTerminatedValue(data.shortText, 0x01)

            .appendValue(data.text, null, 0x01)

            .getBuffer()

    },

    read: (buffer: Buffer) => {

        const reader = new FrameReader(buffer, 0)

        return {

            language: reader.consumeStaticValue('string', 3, 0x00),

            shortText: reader.consumeNullTerminatedValue('string'),

            text: reader.consumeStaticValue('string', null)

        }

    }

}