@greenwood/cli/src/plugins/resource/plugin-standard-audio.js

Greenwood CLI.

/*
 *
 * Manages web standard resource related operations for audio formats.
 * This is a Greenwood default plugin.
 *
 */
import fs from "fs/promises";

class StandardAudioResource {
  constructor(compilation) {
    this.compilation = compilation;

    // https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Audio_codecs
    // https://www.thoughtco.com/audio-file-mime-types-3469485
    this.extensions = ["mid", "mp3", "m3u", "oga", "ra", "wav"];
  }

  async shouldServe(url) {
    const extension = url.pathname.split(".").pop();

    return url.protocol === "file:" && this.extensions.includes(extension);
  }

  async serve(url) {
    const extension = url.pathname.split(".").pop();
    const body = await fs.readFile(url);
    let contentType = "";

    switch (extension) {
      case "3gp":
        contentType = "audio/3gp";
        break;
      case "mid":
        contentType = "audio/mid";
        break;
      case "mp3":
        contentType = "audio/mpeg";
        break;
      case "mp4":
        contentType = "audio/mp4";
        break;
      case "m3u":
        contentType = "audio/x-mpegurl";
        break;
      case "oga":
      case "ogg":
        contentType = `audio/${extension}`;
        break;
      case "ra":
        contentType = "audio/vnd.rn-realaudio";
        break;
      case "wav":
        contentType = "audio/vnd.wav";
        break;
      default:
    }

    return new Response(body, {
      headers: new Headers({
        "Content-Type": contentType,
        "Content-Length": String(body.toString().length),
      }),
    });
  }
}

const greenwoodPluginStandardAudio = {
  type: "resource",
  name: "plugin-standard-audio",
  provider: (compilation) => new StandardAudioResource(compilation),
};

export { greenwoodPluginStandardAudio };