index.js

'use strict';

var path = require('path');

var extensions = require('./index.json');
var unknown = extensions[''];

function isString(value) {
  return (typeof value === 'string') ||
    (Object.prototype.toString.call(value) === '[object String]');
}

function getIcon(filename, type) {
  // Extract extension from the filename
  var ext = isString(filename) ? path.extname(filename).toLowerCase() : '';

  // Validate type - it should be 'svg' or '.svg'
  type = isString(type) ? type.toLowerCase() : '';
  if (type.charAt(0) === '.') {
    type = type.substr(1, type.length);
  }
  if (['svg'].indexOf(type) >= 0) {
    type = '.' + type;
  } else {
    type = '';
  }

  return (extensions[ext] || unknown) + type;
}

module.exports.getIcon = getIcon;

module.exports.unknown = unknown;
module.exports.extensions = extensions;