cli.js

#!/usr/bin/env node

const path = require('path');
const program = require('commander');
const info = require('./package.json');
const Metaflac = require('./index');

let file;

program.version(info.version, '-v, --version');

program.arguments('<FLACfile>').action((FLACfile) => {
  file = FLACfile;
});
program.option('--show-md5sum', 'Show the MD5 signature from the STREAMINFO block.');
program.option('--show-min-blocksize', 'Show the minimum block size from the STREAMINFO block.');
program.option('--show-max-blocksize', 'Show the maximum block size from the STREAMINFO block.');
program.option('--show-min-framesize', 'Show the minimum frame size from the STREAMINFO block.');
program.option('--show-max-framesize', 'Show the maximum frame size from the STREAMINFO block.');
program.option('--show-sample-rate', 'Show the sample rate from the STREAMINFO block.');
program.option('--show-channels', 'Show the number of channels from the STREAMINFO block.');
program.option('--show-bps', 'Show the # of bits per sample from the STREAMINFO block.');
program.option('--show-total-samples', 'Show the total # of samples from the STREAMINFO block.');
program.option('--show-vendor-tag', 'Show the vendor string from the VORBIS_COMMENT block.');
program.option('--show-tag <NAME>', 'Show all tags where the the field name matches NAME.');
program.option('--remove-tag <NAME>', 'Remove all tags whose field name is NAME.');
program.option('--remove-first-tag <NAME>', 'Remove first tag whose field name is NAME.');
program.option('--remove-all-tags', 'Remove all tags, leaving only the vendor string.');
program.option(
  '--set-tag <FIELD>',
  'Add a tag. The FIELD must comply with the Vorbis comment spec, of the form NAME=VALUE. If there is currently no tag block, one will be created.'
);
program.option(
  '--set-tag-from-file <FIELD>',
  'Like --set-tag, except the VALUE is a filename whose contents will be read verbatim to set the tag value.'
);
program.option('--import-tags-from <FILE>', 'Import tags from a file.');
program.option(
  '--export-tags-to <FILE>',
  'Export tags to a file. Use - for stdout. Each line will be of the form NAME=VALUE.'
);
program.option('--import-picture-from <FILENAME>', 'Import a picture and store it in a PICTURE metadata block.');
program.option('--export-picture-to <FILE>', 'Export PICTURE block to a file.');
program.option('--list-picture', 'List all picture block info.');

program.parse(process.argv);

if (typeof file === 'undefined') {
  console.error('ERROR: you must specify one FLAC file;');
  process.exit(1);
}
try {
  const flac = new Metaflac(file);
  if (program.showMd5sum) {
    console.log(flac.getMd5sum());
  }
  if (program.showMinBlocksize) {
    console.log(flac.getMinBlocksize());
  }
  if (program.showMaxBlocksize) {
    console.log(flac.getMaxBlocksize());
  }
  if (program.showMinFramesize) {
    console.log(flac.getMinFramesize());
  }
  if (program.showMaxFramesize) {
    console.log(flac.getMaxFramesize());
  }
  if (program.showSampleRate) {
    console.log(flac.getSampleRate());
  }
  if (program.showChannels) {
    console.log(flac.getChannels());
  }
  if (program.showBps) {
    console.log(flac.getBps());
  }
  if (program.showTotalSamples) {
    console.log(flac.getTotalSamples());
  }
  if (program.showVendorTag) {
    console.log(flac.getVendorTag());
  }
  if (program.showTag) {
    console.log(flac.getTag(program.showTag));
  }
  if (program.removeTag) {
    flac.removeTag(program.removeTag);
    console.log(flac.getAllTags().join('\n'));
  }
  if (program.removeFirstTag) {
    flac.removeFirstTag(program.removeFirstTag);
    console.log(flac.getAllTags().join('\n'));
  }
  if (program.removeAllTags) {
    flac.removeAllTags();
    console.log(flac.getAllTags().join('\n'));
  }
  if (program.setTag) {
    flac.setTag(program.setTag);
    console.log(flac.getAllTags().join('\n'));
    flac.save();
  }
  if (program.setTagFromFile) {
    flac.setTagFromFile(program.setTagFromFile);
    console.log(flac.getAllTags().join('\n'));
  }
  if (program.importTagsFrom) {
    flac.importTagsFrom(program.importTagsFrom);
    console.log(flac.getAllTags().join('\n'));
  }
  if (program.exportTagsTo) {
    if (program.exportTagsTo === '-') {
      console.log(flac.getAllTags().join('\n'));
    } else {
      let filepath;
      if (!path.isAbsolute(program.exportTagsTo)) {
        filepath = path.resolve(process.cwd(), program.exportTagsTo);
      } else {
        filepath = program.exportTagsTo;
      }
      flac.exportTagsTo(filepath);
    }
  }
  if (program.importPictureFrom) {
    let filepath;
    if (!path.isAbsolute(program.importPictureFrom)) {
      filepath = path.resolve(process.cwd(), program.importPictureFrom);
    } else {
      filepath = program.importPictureFrom;
    }
    flac.importPictureFrom(filepath);
    flac.save();
  }
  if (program.exportPictureTo) {
    let filepath;
    if (!path.isAbsolute(program.exportPictureTo)) {
      filepath = path.resolve(process.cwd(), program.exportPictureTo);
    } else {
      filepath = program.exportPictureTo;
    }
    flac.exportPictureTo(filepath);
  }

  if (program.listPicture) {
    flac.getPicturesSpecs().forEach((spec) => console.log(spec));
  }
} catch (e) {
  console.log(`Error: ${e.message}`);
  process.exit(1);
}