get-output-path.js

/* globals Npm */
import R from 'ramda';
import path from 'path';
import format from 'string-template';

export default function getOutputPath(filePath, outputPathTemplates) {
  const template = getTemplate(filePath, outputPathTemplates);
  const extname = path.extname(filePath);

  return format(template, {
    dirname: path.dirname(filePath),
    basename: path.basename(filePath, extname),
    extname
  });
}

function getTemplate(filePath, outputPathTemplates) {
  if (R.type(outputPathTemplates) === 'String') {
    return outputPathTemplates;
  }

  const keys = Object.keys(outputPathTemplates);
  for (let index = 0; index < keys.length; index++) {
    const key = keys[index];
    if (key === 'default') continue;
    let val = outputPathTemplates[key];
    if (R.type(val) === 'String') {
      val = outputPathTemplates[key] = { template: val, regex: new RegExp(key) };
    }
    if (val.regex.test(filePath)) {
      return val.template;
    }
  }

  return outputPathTemplates['default'] || '{dirname}/{basename}{extname}';
}