string-etc/node/etc.js

Collection of supplementary JavaScript String methods that works across module packaging systems and that can be included piece-wise

/*
 * Copyright (c) 2015 Dickson Tam
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */

var fxmap = {
  'chunk' : '../lib/chunk.js',
  'cram' : '../lib/cram.js',
  'pad' : '../lib/pad.js',
}

function importMethods(target, fx) {

  if (fx instanceof Array) {
    return fx.map(function(fx) {
      importMethods(target, fx);
    });
  }

  var path = fxmap[fx];

  if (!path) return;

  var abspath = require.resolve(path);

  delete require.cache[abspath]; // Force reload

  target = (target instanceof Array)? target : [ target ];

  target.map(function(obj) {
    obj[fx] = require(path);
  });

}

function createWrapper(fxlist) {
  var methods = {};
  var Wrapper = function(str) {

    if (!(typeof(str) == 'string'))
      throw new Error('string-etc: First argument(' + str + ') of initializer must be an array');

    for(fx in methods) {
      Wrapper[fx] = methods[fx].bind(undefined, str);
    }

    return Wrapper;
  }

  importMethods([ methods, Wrapper ], fxlist);

  return Wrapper;
}

module.exports = {
  wrap: createWrapper,
  load: importMethods.bind(undefined, String.prototype)
}