Zazama / node-id3

import { TextEncoding } from "../definitions/Encoding"

import { FrameBuilder } from "../FrameBuilder"

import { FrameReader } from "../FrameReader"

import { Comment } from "../types/TagFrames"

import { validateLanguageCode } from "./util"

export const COMM = {

    create: (data: Comment): Buffer => {

        if(data.text == undefined) {

            throw new TypeError("Missing text from 'Comment' frame")

        }

        return new FrameBuilder("COMM", TextEncoding.UTF_16_WITH_BOM)

            .appendText(validateLanguageCode(data.language))

            .appendTerminatedTextWithFrameEncoding(data.shortText ?? "")

            .appendTerminatedTextWithFrameEncoding(data.text)

            .getBufferWithPartialHeader()

    },

    read: (buffer: Buffer): Comment => {

        const reader = new FrameReader(buffer, {consumeEncodingByte: true})

        return {

            language: reader.consumeText({size: 3}),

            shortText: reader.consumeTerminatedTextWithFrameEncoding(),

            text: reader.consumeTextWithFrameEncoding()

        }

    }

}