orbit-state-tree/dist/orbit-state-tree.js

State tree manager based on Orbit.js

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

var invariant = _interopDefault(require('invariant'));
var normalize = _interopDefault(require('json-api-normalizer'));
var Jsona = _interopDefault(require('jsona'));
var core = require('@orbit/core');
var build = _interopDefault(require('redux-object'));

'use strict';

var domain;

// This constructor is used to store event handlers. Instantiating this is
// faster than explicitly calling `Object.create(null)` to get a "clean" empty
// object (tested with v8 v4.9).
function EventHandlers() {}
EventHandlers.prototype = Object.create(null);

function EventEmitter() {
  EventEmitter.init.call(this);
}
// nodejs oddity
// require('events') === require('events').EventEmitter
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.usingDomains = false;

EventEmitter.prototype.domain = undefined;
EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
EventEmitter.defaultMaxListeners = 10;

EventEmitter.init = function() {
  this.domain = null;
  if (EventEmitter.usingDomains) {
    // if there is an active domain, then attach to it.
    if (domain.active && !(this instanceof domain.Domain)) {
      this.domain = domain.active;
    }
  }

  if (!this._events || this._events === Object.getPrototypeOf(this)._events) {
    this._events = new EventHandlers();
    this._eventsCount = 0;
  }

  this._maxListeners = this._maxListeners || undefined;
};

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
  if (typeof n !== 'number' || n < 0 || isNaN(n))
    throw new TypeError('"n" argument must be a positive number');
  this._maxListeners = n;
  return this;
};

function $getMaxListeners(that) {
  if (that._maxListeners === undefined)
    return EventEmitter.defaultMaxListeners;
  return that._maxListeners;
}

EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
  return $getMaxListeners(this);
};

// These standalone emit* functions are used to optimize calling of event
// handlers for fast cases because emit() itself often has a variable number of
// arguments and can be deoptimized because of that. These functions always have
// the same number of arguments and thus do not get deoptimized, so the code
// inside them can execute faster.
function emitNone(handler, isFn, self) {
  if (isFn)
    handler.call(self);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self);
  }
}
function emitOne(handler, isFn, self, arg1) {
  if (isFn)
    handler.call(self, arg1);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1);
  }
}
function emitTwo(handler, isFn, self, arg1, arg2) {
  if (isFn)
    handler.call(self, arg1, arg2);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1, arg2);
  }
}
function emitThree(handler, isFn, self, arg1, arg2, arg3) {
  if (isFn)
    handler.call(self, arg1, arg2, arg3);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1, arg2, arg3);
  }
}

function emitMany(handler, isFn, self, args) {
  if (isFn)
    handler.apply(self, args);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].apply(self, args);
  }
}

EventEmitter.prototype.emit = function emit(type) {
  var er, handler, len, args, i, events, domain;
  var needDomainExit = false;
  var doError = (type === 'error');

  events = this._events;
  if (events)
    doError = (doError && events.error == null);
  else if (!doError)
    return false;

  domain = this.domain;

  // If there is no 'error' event listener then throw.
  if (doError) {
    er = arguments[1];
    if (domain) {
      if (!er)
        er = new Error('Uncaught, unspecified "error" event');
      er.domainEmitter = this;
      er.domain = domain;
      er.domainThrown = false;
      domain.emit('error', er);
    } else if (er instanceof Error) {
      throw er; // Unhandled 'error' event
    } else {
      // At least give some kind of context to the user
      var err = new Error('Uncaught, unspecified "error" event. (' + er + ')');
      err.context = er;
      throw err;
    }
    return false;
  }

  handler = events[type];

  if (!handler)
    return false;

  var isFn = typeof handler === 'function';
  len = arguments.length;
  switch (len) {
    // fast cases
    case 1:
      emitNone(handler, isFn, this);
      break;
    case 2:
      emitOne(handler, isFn, this, arguments[1]);
      break;
    case 3:
      emitTwo(handler, isFn, this, arguments[1], arguments[2]);
      break;
    case 4:
      emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
      break;
    // slower
    default:
      args = new Array(len - 1);
      for (i = 1; i < len; i++)
        args[i - 1] = arguments[i];
      emitMany(handler, isFn, this, args);
  }

  if (needDomainExit)
    domain.exit();

  return true;
};

function _addListener(target, type, listener, prepend) {
  var m;
  var events;
  var existing;

  if (typeof listener !== 'function')
    throw new TypeError('"listener" argument must be a function');

  events = target._events;
  if (!events) {
    events = target._events = new EventHandlers();
    target._eventsCount = 0;
  } else {
    // To avoid recursion in the case that type === "newListener"! Before
    // adding it to the listeners, first emit "newListener".
    if (events.newListener) {
      target.emit('newListener', type,
                  listener.listener ? listener.listener : listener);

      // Re-assign `events` because a newListener handler could have caused the
      // this._events to be assigned to a new object
      events = target._events;
    }
    existing = events[type];
  }

  if (!existing) {
    // Optimize the case of one listener. Don't need the extra array object.
    existing = events[type] = listener;
    ++target._eventsCount;
  } else {
    if (typeof existing === 'function') {
      // Adding the second element, need to change to array.
      existing = events[type] = prepend ? [listener, existing] :
                                          [existing, listener];
    } else {
      // If we've already got an array, just append.
      if (prepend) {
        existing.unshift(listener);
      } else {
        existing.push(listener);
      }
    }

    // Check for listener leak
    if (!existing.warned) {
      m = $getMaxListeners(target);
      if (m && m > 0 && existing.length > m) {
        existing.warned = true;
        var w = new Error('Possible EventEmitter memory leak detected. ' +
                            existing.length + ' ' + type + ' listeners added. ' +
                            'Use emitter.setMaxListeners() to increase limit');
        w.name = 'MaxListenersExceededWarning';
        w.emitter = target;
        w.type = type;
        w.count = existing.length;
        emitWarning(w);
      }
    }
  }

  return target;
}
function emitWarning(e) {
  typeof console.warn === 'function' ? console.warn(e) : console.log(e);
}
EventEmitter.prototype.addListener = function addListener(type, listener) {
  return _addListener(this, type, listener, false);
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.prependListener =
    function prependListener(type, listener) {
      return _addListener(this, type, listener, true);
    };

function _onceWrap(target, type, listener) {
  var fired = false;
  function g() {
    target.removeListener(type, g);
    if (!fired) {
      fired = true;
      listener.apply(target, arguments);
    }
  }
  g.listener = listener;
  return g;
}

EventEmitter.prototype.once = function once(type, listener) {
  if (typeof listener !== 'function')
    throw new TypeError('"listener" argument must be a function');
  this.on(type, _onceWrap(this, type, listener));
  return this;
};

EventEmitter.prototype.prependOnceListener =
    function prependOnceListener(type, listener) {
      if (typeof listener !== 'function')
        throw new TypeError('"listener" argument must be a function');
      this.prependListener(type, _onceWrap(this, type, listener));
      return this;
    };

// emits a 'removeListener' event iff the listener was removed
EventEmitter.prototype.removeListener =
    function removeListener(type, listener) {
      var list, events, position, i, originalListener;

      if (typeof listener !== 'function')
        throw new TypeError('"listener" argument must be a function');

      events = this._events;
      if (!events)
        return this;

      list = events[type];
      if (!list)
        return this;

      if (list === listener || (list.listener && list.listener === listener)) {
        if (--this._eventsCount === 0)
          this._events = new EventHandlers();
        else {
          delete events[type];
          if (events.removeListener)
            this.emit('removeListener', type, list.listener || listener);
        }
      } else if (typeof list !== 'function') {
        position = -1;

        for (i = list.length; i-- > 0;) {
          if (list[i] === listener ||
              (list[i].listener && list[i].listener === listener)) {
            originalListener = list[i].listener;
            position = i;
            break;
          }
        }

        if (position < 0)
          return this;

        if (list.length === 1) {
          list[0] = undefined;
          if (--this._eventsCount === 0) {
            this._events = new EventHandlers();
            return this;
          } else {
            delete events[type];
          }
        } else {
          spliceOne(list, position);
        }

        if (events.removeListener)
          this.emit('removeListener', type, originalListener || listener);
      }

      return this;
    };

EventEmitter.prototype.removeAllListeners =
    function removeAllListeners(type) {
      var listeners, events;

      events = this._events;
      if (!events)
        return this;

      // not listening for removeListener, no need to emit
      if (!events.removeListener) {
        if (arguments.length === 0) {
          this._events = new EventHandlers();
          this._eventsCount = 0;
        } else if (events[type]) {
          if (--this._eventsCount === 0)
            this._events = new EventHandlers();
          else
            delete events[type];
        }
        return this;
      }

      // emit removeListener for all listeners on all events
      if (arguments.length === 0) {
        var keys = Object.keys(events);
        for (var i = 0, key; i < keys.length; ++i) {
          key = keys[i];
          if (key === 'removeListener') continue;
          this.removeAllListeners(key);
        }
        this.removeAllListeners('removeListener');
        this._events = new EventHandlers();
        this._eventsCount = 0;
        return this;
      }

      listeners = events[type];

      if (typeof listeners === 'function') {
        this.removeListener(type, listeners);
      } else if (listeners) {
        // LIFO order
        do {
          this.removeListener(type, listeners[listeners.length - 1]);
        } while (listeners[0]);
      }

      return this;
    };

EventEmitter.prototype.listeners = function listeners(type) {
  var evlistener;
  var ret;
  var events = this._events;

  if (!events)
    ret = [];
  else {
    evlistener = events[type];
    if (!evlistener)
      ret = [];
    else if (typeof evlistener === 'function')
      ret = [evlistener.listener || evlistener];
    else
      ret = unwrapListeners(evlistener);
  }

  return ret;
};

EventEmitter.listenerCount = function(emitter, type) {
  if (typeof emitter.listenerCount === 'function') {
    return emitter.listenerCount(type);
  } else {
    return listenerCount.call(emitter, type);
  }
};

EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
  var events = this._events;

  if (events) {
    var evlistener = events[type];

    if (typeof evlistener === 'function') {
      return 1;
    } else if (evlistener) {
      return evlistener.length;
    }
  }

  return 0;
}

EventEmitter.prototype.eventNames = function eventNames() {
  return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
};

// About 1.5x faster than the two-arg version of Array#splice().
function spliceOne(list, index) {
  for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1)
    list[i] = list[k];
  list.pop();
}

function arrayClone(arr, i) {
  var copy = new Array(i);
  while (i--)
    copy[i] = arr[i];
  return copy;
}

function unwrapListeners(arr) {
  var ret = new Array(arr.length);
  for (var i = 0; i < ret.length; ++i) {
    ret[i] = arr[i].listener || arr[i];
  }
  return ret;
}

var asyncGenerator = function () {
  function AwaitValue(value) {
    this.value = value;
  }

  function AsyncGenerator(gen) {
    var front, back;

    function send(key, arg) {
      return new Promise(function (resolve, reject) {
        var request = {
          key: key,
          arg: arg,
          resolve: resolve,
          reject: reject,
          next: null
        };

        if (back) {
          back = back.next = request;
        } else {
          front = back = request;
          resume(key, arg);
        }
      });
    }

    function resume(key, arg) {
      try {
        var result = gen[key](arg);
        var value = result.value;

        if (value instanceof AwaitValue) {
          Promise.resolve(value.value).then(function (arg) {
            resume("next", arg);
          }, function (arg) {
            resume("throw", arg);
          });
        } else {
          settle(result.done ? "return" : "normal", result.value);
        }
      } catch (err) {
        settle("throw", err);
      }
    }

    function settle(type, value) {
      switch (type) {
        case "return":
          front.resolve({
            value: value,
            done: true
          });
          break;

        case "throw":
          front.reject(value);
          break;

        default:
          front.resolve({
            value: value,
            done: false
          });
          break;
      }

      front = front.next;

      if (front) {
        resume(front.key, front.arg);
      } else {
        back = null;
      }
    }

    this._invoke = send;

    if (typeof gen.return !== "function") {
      this.return = undefined;
    }
  }

  if (typeof Symbol === "function" && Symbol.asyncIterator) {
    AsyncGenerator.prototype[Symbol.asyncIterator] = function () {
      return this;
    };
  }

  AsyncGenerator.prototype.next = function (arg) {
    return this._invoke("next", arg);
  };

  AsyncGenerator.prototype.throw = function (arg) {
    return this._invoke("throw", arg);
  };

  AsyncGenerator.prototype.return = function (arg) {
    return this._invoke("return", arg);
  };

  return {
    wrap: function (fn) {
      return function () {
        return new AsyncGenerator(fn.apply(this, arguments));
      };
    },
    await: function (value) {
      return new AwaitValue(value);
    }
  };
}();





var classCallCheck = function (instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
};

var createClass = function () {
  function defineProperties(target, props) {
    for (var i = 0; i < props.length; i++) {
      var descriptor = props[i];
      descriptor.enumerable = descriptor.enumerable || false;
      descriptor.configurable = true;
      if ("value" in descriptor) descriptor.writable = true;
      Object.defineProperty(target, descriptor.key, descriptor);
    }
  }

  return function (Constructor, protoProps, staticProps) {
    if (protoProps) defineProperties(Constructor.prototype, protoProps);
    if (staticProps) defineProperties(Constructor, staticProps);
    return Constructor;
  };
}();





var defineProperty = function (obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
};

/**
 * Serialize plain objects into json api format
 */

var Serializer = function () {
  function Serializer(schema) {
    classCallCheck(this, Serializer);

    this._formatter = new Jsona();
    this._schema = schema;
  }

  /**
   * Augment object with attributes needed by formatter
   *
   * @param {String} type Object type
   * @param {Object} object
   */


  createClass(Serializer, [{
    key: '_augmentObject',
    value: function _augmentObject(type, object) {
      var _this = this;

      var relationships = this._schema.models[type].relationships;
      var relationshipNames = relationships ? Object.keys(relationships) : [];

      var _iteratorNormalCompletion = true;
      var _didIteratorError = false;
      var _iteratorError = undefined;

      try {
        var _loop = function _loop() {
          var relationshipName = _step.value;

          if (!object[relationshipName]) {
            return 'continue';
          }
          if (Array.isArray(object[relationshipName])) {
            object[relationshipName] = object[relationshipName].map(function (relationshipObject) {
              return _this._augmentObject(relationships[relationshipName].model, relationshipObject);
            });
            return 'continue';
          }
          object[relationshipName] = _this._augmentObject(relationships[relationshipName].model, object[relationshipName]);
        };

        for (var _iterator = relationshipNames[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
          var _ret = _loop();

          if (_ret === 'continue') continue;
        }
      } catch (err) {
        _didIteratorError = true;
        _iteratorError = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion && _iterator.return) {
            _iterator.return();
          }
        } finally {
          if (_didIteratorError) {
            throw _iteratorError;
          }
        }
      }

      return Object.assign({
        type: type,
        relationshipNames: relationshipNames
      }, object);
    }

    /**
     * Serialize an object into json api format
     *
     * @param {String} type Object type
     * @param {Object} object Object
     * @returns {Object}
     */

  }, {
    key: 'serialize',
    value: function serialize(type, object) {
      invariant(type in this._schema.models, 'serialized type must exist in schema');
      return this._formatter.serialize({ stuff: this._augmentObject(type, object) });
    }
  }]);
  return Serializer;
}();

var StateTree = function () {
  /**
   * Initialize the state tree with your store and schema instances
   *
   * @param {Object} {store, schema}
   * @memberof StateTree
   */
  function StateTree(_ref) {
    var store = _ref.store,
        schema = _ref.schema;
    classCallCheck(this, StateTree);

    invariant(store, 'Store instance required');
    invariant(schema, 'Schema instance required');
    this._store = store;
    this._schema = schema;
    this._serializer = new Serializer(this._schema);
    this._events = new EventEmitter();
    this._lastRequestId = 0;
    this._state = {
      entities: {},
      requests: {}
    };
  }

  /**
   * Listen for tree changes, receving a new tree every time a change is comitted
   *
   * @param {Function} callback
   */


  createClass(StateTree, [{
    key: 'onChange',
    value: function onChange(callback) {
      return this._events.addListener('change', callback);
    }

    /**
     * Listen for unhandled errors, errors coming from orbitjs are described on request object
     *
     * @param {Function} callback
     */

  }, {
    key: 'onUnhandledError',
    value: function onUnhandledError(callback) {
      return this._events.addListener('unhandledError', callback);
    }

    /**
     * Adds an record
     *
     * @param {String} type
     * @param {Object} object
     */

  }, {
    key: 'addRecord',
    value: function addRecord(type, object) {
      return this._storeUpdate('addRecord', [this._serialize(type, object)]);
    }

    /**
     * Replaces an entire record
     *
     * @param {String} type
     * @param {Object} object
     */

  }, {
    key: 'replaceRecord',
    value: function replaceRecord(type, object) {
      return this._storeUpdate('replaceRecord', [this._serialize(type, object)]);
    }

    /**
     * Removes an record
     *
     * @param {String} type
     * @param {String} id
     */

  }, {
    key: 'removeRecord',
    value: function removeRecord(type, id) {
      return this._storeUpdate('removeRecord', [{ type: type, id: id }]);
    }

    /**
     * Replaces a key
     *
     * @param {String} type
     * @param {String} id
     * @param {String} keyName
     * @param {String} keyValue
     */

  }, {
    key: 'replaceKey',
    value: function replaceKey(type, id, keyName, keyValue) {
      return this._storeUpdate('replaceKey', [{ type: type, id: id }, keyName, keyValue]);
    }

    /**
     * Replaces an attribute
     *
     * @param {String} type
     * @param {String} id
     * @param {String} attributeName
     * @param {String} attributeValue
     */

  }, {
    key: 'replaceAttribute',
    value: function replaceAttribute(type, id, attributeName, attributeValue) {
      return this._storeUpdate('replaceAttribute', [{ type: type, id: id }, attributeName, attributeValue]);
    }

    /**
     * Adds a member to a to-many relationship
     *
     * @param {String} type
     * @param {String} id
     * @param {String} relationshipName
     * @param {String} relationshipId
     */

  }, {
    key: 'addToRelatedRecords',
    value: function addToRelatedRecords(type, id, relationshipName, relationshipId) {
      this._validateRelationship(type, relationshipName, 'hasMany');
      var relationshipType = this._schema.models[type].relationships[relationshipName].model;
      return this._storeUpdate('addToRelatedRecords', [{ type: type, id: id }, relationshipName, { type: relationshipType, id: relationshipId }]);
    }

    /**
     * Removes a member from a to-many relationship
     *
     * @param {String} type
     * @param {String} id
     * @param {String} relationshipName
     * @param {String} relationshipId
     */

  }, {
    key: 'removeFromRelatedRecords',
    value: function removeFromRelatedRecords(type, id, relationshipName, relationshipId) {
      this._validateRelationship(type, relationshipName, 'hasMany');
      var relationshipType = this._schema.models[type].relationships[relationshipName].model;
      return this._storeUpdate('removeFromRelatedRecords', [{ type: type, id: id }, relationshipName, { type: relationshipType, id: relationshipId }]);
    }

    /**
     * Replaces every member of a to-many relationship
     *
     * @param {String} type
     * @param {String} id
     * @param {String} relationshipName
     * @param {String[]} relationshipIds
     */

  }, {
    key: 'replaceRelatedRecords',
    value: function replaceRelatedRecords(type, id, relationshipName, relationshipIds) {
      this._validateRelationship(type, relationshipName, 'hasMany');
      var relationshipType = this._schema.models[type].relationships[relationshipName].model;
      var data = relationshipIds.map(function (id) {
        return { type: relationshipType, id: id };
      });
      return this._storeUpdate('replaceRelatedRecords', [{ type: type, id: id }, relationshipName, data]);
    }

    /**
     * Replaces a to-one relationship
     *
     * @param {String} type
     * @param {String} id
     * @param {String} relationshipName
     * @param {String} relationshipId
     */

  }, {
    key: 'replaceRelatedRecord',
    value: function replaceRelatedRecord(type, id, relationshipName, relationshipId) {
      this._validateRelationship(type, relationshipName, 'hasOne');
      var relationshipType = this._schema.models[type].relationships[relationshipName].model;
      return this._storeUpdate('replaceRelatedRecord', [{ type: type, id: id }, relationshipName, { type: relationshipType, id: relationshipId }]);
    }

    /**
     * Find a record by its identity.
     *
     * @param {String} type
     * @param {String} id
     */

  }, {
    key: 'findRecord',
    value: function findRecord(type, id) {
      return this._storeQuery('findRecord', [{ type: type, id: id }]);
    }

    /**
     * Find all records of a specific type.
     *
     * @param {String} type
     * @param {Object} query
     */

  }, {
    key: 'findRecords',
    value: function findRecords(type, query) {
      var hook = function hook(builder) {
        if (query.filter) {
          var _iteratorNormalCompletion = true;
          var _didIteratorError = false;
          var _iteratorError = undefined;

          try {
            for (var _iterator = query.filter[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
              var filter = _step.value;

              builder.filter(filter);
            }
          } catch (err) {
            _didIteratorError = true;
            _iteratorError = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion && _iterator.return) {
                _iterator.return();
              }
            } finally {
              if (_didIteratorError) {
                throw _iteratorError;
              }
            }
          }
        }
        if (query.sort) {
          var _iteratorNormalCompletion2 = true;
          var _didIteratorError2 = false;
          var _iteratorError2 = undefined;

          try {
            for (var _iterator2 = query.sort[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
              var sort = _step2.value;

              builder.sort(sort);
            }
          } catch (err) {
            _didIteratorError2 = true;
            _iteratorError2 = err;
          } finally {
            try {
              if (!_iteratorNormalCompletion2 && _iterator2.return) {
                _iterator2.return();
              }
            } finally {
              if (_didIteratorError2) {
                throw _iteratorError2;
              }
            }
          }
        }
        if (query.page) {
          builder.page(query.page);
        }
        return builder;
      };
      return this._storeQuery('findRecords', [type], hook);
    }

    /**
     * Find a related record in a to-one relationship
     *
     * @param {String} type
     * @param {String} id
     * @param {String} relationship
     */

  }, {
    key: 'findRelatedRecord',
    value: function findRelatedRecord(type, id, relationship) {
      this._validateRelationship(type, relationship, 'hasOne');
      return this._storeQuery('findRelatedRecord', [{ type: type, id: id }, relationship]);
    }

    /**
     * Find a related record in a to-one relationship
     *
     * @param {String} type
     * @param {String} id
     * @param {String} relationship
     */

  }, {
    key: 'findRelatedRecords',
    value: function findRelatedRecords(type, id, relationship) {
      this._validateRelationship(type, relationship, 'hasMany');
      return this._storeQuery('findRelatedRecords', [{ type: type, id: id }, relationship]);
    }
  }, {
    key: '_validateRelationship',
    value: function _validateRelationship(type, name, relationshipType) {
      var isValid = this._schema.models[type] && this._schema.models[type].relationships[name] && (!relationshipType || this._schema.models[type].relationships[name].type === relationshipType);
      if (!isValid) {
        throw new Error('Invalid relationship ' + name + ' on model ' + type + ' with type ' + relationshipType);
      }
    }
  }, {
    key: '_serialize',
    value: function _serialize(type, object) {
      return this._serializer.serialize(type, object).data;
    }
  }, {
    key: '_storeUpdate',
    value: function _storeUpdate(method, args) {
      var _this = this;

      var requestId = this._createRequest();
      var promise = this._store.update(function (t) {
        return t[method].apply(t, args);
      }).then(function (jsonApiObject) {
        return _this._handeRequestSuccess(requestId, jsonApiObject);
      }).catch(function (error) {
        return _this._handleRequestError(requestId, error);
      });
      return { requestId: requestId, promise: promise };
    }
  }, {
    key: '_storeQuery',
    value: function _storeQuery(method, args, hook) {
      var _this2 = this;

      var requestId = this._createRequest();
      var promise = this._store.query(function (queryBuilder) {
        var query = queryBuilder[method].apply(queryBuilder, args);
        if (hook) {
          query = hook(query);
        }
        return query;
      }).then(function (jsonApiObject) {
        return _this2._handeRequestSuccess(requestId, jsonApiObject);
      }).catch(function (error) {
        return _this2._handleRequestError(requestId, error);
      });
      return { requestId: requestId, promise: promise };
    }
  }, {
    key: '_createRequest',
    value: function _createRequest() {
      var requestId = ++this._lastRequestId;
      this._mergeState({
        requests: defineProperty({}, requestId, {
          id: requestId,
          completed: false,
          timestamp: new Date().getTime()
        })
      });
      return requestId;
    }
  }, {
    key: '_handeRequestSuccess',
    value: function _handeRequestSuccess(requestId, response) {
      var idsByType = {};
      if (Array.isArray(response)) {
        var _iteratorNormalCompletion3 = true;
        var _didIteratorError3 = false;
        var _iteratorError3 = undefined;

        try {
          for (var _iterator3 = response[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
            var item = _step3.value;

            if (!idsByType[item.type]) {
              idsByType[item.type] = [];
            }
            idsByType[item.type].push(item.id);
          }
        } catch (err) {
          _didIteratorError3 = true;
          _iteratorError3 = err;
        } finally {
          try {
            if (!_iteratorNormalCompletion3 && _iterator3.return) {
              _iterator3.return();
            }
          } finally {
            if (_didIteratorError3) {
              throw _iteratorError3;
            }
          }
        }
      } else if (response && response.type) {
        idsByType[response.type] = [response.id];
      }
      this._insertEntities(requestId, normalize({ data: response }), idsByType);
    }
  }, {
    key: '_handleRequestError',
    value: function _handleRequestError(requestId, error) {
      if (!(error instanceof core.Exception)) {
        this._events.emit('unhandledError', error, requestId);
        return error;
      }
      var request = {
        id: requestId,
        completed: true,
        result: {},
        error: {
          message: error.message,
          description: error.description,
          type: error.type,
          id: error.id,
          relationship: error.relationship
        }
      };
      this._mergeState({
        entities: {},
        requests: defineProperty({}, requestId, request)
      });
    }
  }, {
    key: '_insertEntities',
    value: function _insertEntities(requestId, entities, idsByType) {
      var request = {
        id: requestId,
        completed: true,
        result: idsByType,
        error: null
      };
      this._mergeState({
        entities: entities,
        requests: defineProperty({}, requestId, request)
      });
    }
  }, {
    key: '_mergeState',
    value: function _mergeState(mergedState) {
      var newState = Object.assign({}, this._state);
      for (var key in mergedState.entities) {
        newState.entities[key] = Object.assign({}, this._state.entities[key], mergedState.entities[key]);
      }
      for (var _key in mergedState.requests) {
        newState.requests[_key] = Object.assign({}, this._state.requests[_key], mergedState.requests[_key]);
      }
      this._state = newState;
      this._events.emit('change', this._state);
    }
  }]);
  return StateTree;
}();

/**
 * Returns an request object from current state tree
 */
function requestSelector(state, requestId) {
  return state.requests[requestId];
}

/**
 * Return a record from current state tree
 */
function recordSelector(state, type, id) {
  return build(state.entities, type, id);
}

exports.StateTree = StateTree;
exports.requestSelector = requestSelector;
exports.recordSelector = recordSelector;
//# sourceMappingURL=orbit-state-tree.js.map