state-jacket/lib/state-jacket.js

An intuitive state transition system for JavaScript

// Generated by CoffeeScript 1.6.2
/*
StateJacket JS.
An Intuitive State Transition System for JavaScript
Based on State Jacket by hopsoft
*/


(function() {
  'use strict';
  var StateJacket,
    __slice = [].slice,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; },
    __hasProp = {}.hasOwnProperty;

  StateJacket = {};

  StateJacket.Catalog = (function() {
    function Catalog() {
      this.isLocked = false;
      this.states = {};
    }

    Catalog.prototype.add = function() {
      var state, to, transitions;

      state = arguments[0], transitions = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
      if (this.isLocked) {
        throw 'Cannot modify locked StateJacket.Catalog object!';
      }
      return this.states[String(state)] = (function() {
        var _i, _len, _results;

        _results = [];
        for (_i = 0, _len = transitions.length; _i < _len; _i++) {
          to = transitions[_i];
          _results.push(String(to));
        }
        return _results;
      })();
    };

    Catalog.prototype.canTransition = function(from, to) {
      var key, _ref;

      key = String(from);
      if (this.states[key]) {
        if (_ref = String(to), __indexOf.call(this.states[key], _ref) >= 0) {
          return true;
        }
      }
      return false;
    };

    Catalog.prototype.transitioners = function() {
      var state, states, transitions, _ref;

      states = [];
      _ref = this.states;
      for (state in _ref) {
        if (!__hasProp.call(_ref, state)) continue;
        transitions = _ref[state];
        if (transitions.length > 0) {
          states.push(state);
        }
      }
      return states;
    };

    Catalog.prototype.isTransitioner = function(state) {
      var _ref;

      return _ref = String(state), __indexOf.call(this.transitioners(), _ref) >= 0;
    };

    Catalog.prototype.terminators = function() {
      var state, states, transitions, _ref;

      states = [];
      _ref = this.states;
      for (state in _ref) {
        if (!__hasProp.call(_ref, state)) continue;
        transitions = _ref[state];
        if (transitions.length === 0) {
          states.push(state);
        }
      }
      return states;
    };

    Catalog.prototype.isTerminator = function(state) {
      var _ref;

      return _ref = String(state), __indexOf.call(this.terminators(), _ref) >= 0;
    };

    Catalog.prototype.lock = function() {
      var state, transition, transitions, _i, _len, _ref;

      _ref = this.states;
      for (state in _ref) {
        if (!__hasProp.call(_ref, state)) continue;
        transitions = _ref[state];
        for (_i = 0, _len = transitions.length; _i < _len; _i++) {
          transition = transitions[_i];
          if (!(transition in this.states)) {
            throw "" + transition + " is not a first class state.";
          }
        }
      }
      return this.isLocked = true;
    };

    Catalog.prototype.each = function(iterator) {
      var state, transitions, _ref, _results;

      _ref = this.states;
      _results = [];
      for (state in _ref) {
        if (!__hasProp.call(_ref, state)) continue;
        transitions = _ref[state];
        _results.push(iterator(state, transitions));
      }
      return _results;
    };

    Catalog.prototype.keys = function() {
      var state, _ref, _results;

      _ref = this.states;
      _results = [];
      for (state in _ref) {
        if (!__hasProp.call(_ref, state)) continue;
        _results.push(state);
      }
      return _results;
    };

    Catalog.prototype.supportsState = function(state) {
      return String(state) in this.states;
    };

    return Catalog;

  })();

  if (typeof module === 'object' && module.exports) {
    module.exports = StateJacket;
  } else if (typeof define === 'function' && this.define.amd) {
    define([], function() {
      return StateJacket;
    });
  } else {
    this.StateJacket = StateJacket;
  }

}).call(this);