s-pipe/lib/create_chainable.js

Functional streams, with a lisp-inspired chaining syntax

/* jshint loopfunc: true*/
var has = require('has');
var classic = require('classic');

var spipe = require('./index');


var slice = Array.prototype.slice;


module.exports = function createChainable(functionMap) {

  function Chainable() {
    var tgt = this;

    if (!(tgt instanceof Chainable))
      tgt = new Chainable();

    tgt._pipeline = spipe.apply(null, slice.call(arguments));
    return tgt;
  }

  for (var k in functionMap) {
    if (!has(functionMap, k)) continue;
    Chainable.prototype[k] = (function(name, fn) {
      return function() {
        this._pipeline.apply(null, [fn].concat(slice.call(arguments)));
        return this;
      };
    })(k, functionMap[k]);
  }

  Chainable.prototype.end = function(eager) {
    return this._pipeline(eager);
  };

  return Chainable;
};