/*!
 * Vuex v1.0.1
 * (c) 2017 Evan You
 * Released under the MIT License.
 */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.Vuex = factory());
}(this, (function () { 'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
  return typeof obj;
} : function (obj) {
  return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};











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 toConsumableArray = function (arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];

    return arr2;
  } else {
    return Array.from(arr);
  }
};

/**
 * Merge an array of objects into one.
 *
 * @param {Array<Object>} arr
 * @return {Object}
 */

function mergeObjects(arr) {
  return arr.reduce(function (prev, obj) {
    Object.keys(obj).forEach(function (key) {
      var existing = prev[key];
      if (existing) {
        // allow multiple mutation objects to contain duplicate
        // handlers for the same mutation type
        if (Array.isArray(existing)) {
          prev[key] = existing.concat(obj[key]);
        } else {
          prev[key] = [existing].concat(obj[key]);
        }
      } else {
        prev[key] = obj[key];
      }
    });
    return prev;
  }, {});
}

/**
 * Deep copy the given object considering circular structure.
 * This function caches all nested objects and its copies.
 * If it detects circular structure, use cached copy to avoid infinite loop.
 *
 * @param {*} obj
 * @param {Array<Object>} cache
 * @return {*}
 */


/**
 * Check whether the given value is Object or not
 *
 * @param {*} obj
 * @return {Boolean}
 */

function isObject(obj) {
  return obj !== null && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object';
}

/**
 * Get state sub tree by given keys.
 *
 * @param {Object} state
 * @param {Array<String>} nestedKeys
 * @return {Object}
 */
function getNestedState(state, nestedKeys) {
  return nestedKeys.reduce(function (state, key) {
    return state[key];
  }, state);
}

/**
 * Hacks to get access to Vue internals.
 * Maybe we should expose these...
 */

var Watcher = void 0;
function getWatcher(vm) {
  if (!Watcher) {
    var noop = function noop() {};
    var unwatch = vm.$watch(noop, noop);
    Watcher = vm._watchers[0].constructor;
    unwatch();
  }
  return Watcher;
}

var Dep = void 0;
function getDep(vm) {
  if (!Dep) {
    Dep = vm._data.__ob__.dep.constructor;
  }
  return Dep;
}

var hook = typeof window !== 'undefined' && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;

function devtoolPlugin(store) {
  if (!hook) return;

  hook.emit('vuex:init', store);

  hook.on('vuex:travel-to-state', function (targetState) {
    store.replaceState(targetState);
  });

  store.subscribe(function (mutation, state) {
    hook.emit('vuex:mutation', mutation, state);
  });
}

var override = function (Vue) {
  var version = Number(Vue.version.split('.')[0]);

  if (version >= 2) {
    var usesInit = Vue.config._lifecycleHooks.indexOf('init') > -1;
    Vue.mixin(usesInit ? { init: vuexInit } : { beforeCreate: vuexInit });
  } else {
    (function () {
      // override init and inject vuex init procedure
      // for 1.x backwards compatibility.
      var _init = Vue.prototype._init;
      Vue.prototype._init = function () {
        var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

        options.init = options.init ? [vuexInit].concat(options.init) : vuexInit;
        _init.call(this, options);
      };
    })();
  }

  /**
   * Vuex init hook, injected into each instances init hooks list.
   */

  function vuexInit() {
    var options = this.$options;
    var store = options.store,
        vuex = options.vuex;
    // store injection

    if (store) {
      this.$store = store;
    } else if (options.parent && options.parent.$store) {
      this.$store = options.parent.$store;
    }
    // vuex option handling
    if (vuex) {
      if (!this.$store) {
        console.warn('[vuex] store not injected. make sure to ' + 'provide the store option in your root component.');
      }
      var state = vuex.state,
          actions = vuex.actions;
      var getters = vuex.getters;
      // handle deprecated state option

      if (state && !getters) {
        console.warn('[vuex] vuex.state option will been deprecated in 1.0. ' + 'Use vuex.getters instead.');
        getters = state;
      }
      // getters
      if (getters) {
        options.computed = options.computed || {};
        for (var key in getters) {
          defineVuexGetter(this, key, getters[key]);
        }
      }
      // actions
      if (actions) {
        options.methods = options.methods || {};
        for (var _key in actions) {
          options.methods[_key] = makeBoundAction(this.$store, actions[_key], _key);
        }
      }
    }
  }

  /**
   * Setter for all getter properties.
   */

  function setter() {
    throw new Error('vuex getter properties are read-only.');
  }

  /**
   * Define a Vuex getter on an instance.
   *
   * @param {Vue} vm
   * @param {String} key
   * @param {Function} getter
   */

  function defineVuexGetter(vm, key, getter) {
    if (typeof getter !== 'function') {
      console.warn('[vuex] Getter bound to key \'vuex.getters.' + key + '\' is not a function.');
    } else {
      Object.defineProperty(vm, key, {
        enumerable: true,
        configurable: true,
        get: makeComputedGetter(vm.$store, getter),
        set: setter
      });
    }
  }

  /**
   * Make a computed getter, using the same caching mechanism of computed
   * properties. In addition, it is cached on the raw getter function using
   * the store's unique cache id. This makes the same getter shared
   * across all components use the same underlying watcher, and makes
   * the getter evaluated only once during every flush.
   *
   * @param {Store} store
   * @param {Function} getter
   */

  function makeComputedGetter(store, getter) {
    var id = store._getterCacheId;

    // cached
    if (getter[id]) {
      return getter[id];
    }
    var vm = store._vm;
    var Watcher = getWatcher(vm);
    var Dep = getDep(vm);
    var watcher = new Watcher(vm, function (vm) {
      return getter(vm.state);
    }, null, { lazy: true });
    var computedGetter = function computedGetter() {
      if (watcher.dirty) {
        watcher.evaluate();
      }
      if (Dep.target) {
        watcher.depend();
      }
      return watcher.value;
    };
    getter[id] = computedGetter;
    return computedGetter;
  }

  /**
   * Make a bound-to-store version of a raw action function.
   *
   * @param {Store} store
   * @param {Function} action
   * @param {String} key
   */

  function makeBoundAction(store, action, key) {
    if (typeof action !== 'function') {
      console.warn('[vuex] Action bound to key \'vuex.actions.' + key + '\' is not a function.');
    }
    return function vuexBoundAction() {
      for (var _len = arguments.length, args = Array(_len), _key2 = 0; _key2 < _len; _key2++) {
        args[_key2] = arguments[_key2];
      }

      return action.call.apply(action, [this, store].concat(args));
    };
  }

  // option merging
  var merge = Vue.config.optionMergeStrategies.computed;
  Vue.config.optionMergeStrategies.vuex = function (toVal, fromVal) {
    if (!toVal) return fromVal;
    if (!fromVal) return toVal;
    return {
      getters: merge(toVal.getters, fromVal.getters),
      state: merge(toVal.state, fromVal.state),
      actions: merge(toVal.actions, fromVal.actions)
    };
  };
};

var Vue = void 0;
var uid = 0;

var Store = function () {

  /**
   * @param {Object} options
   *        - {Object} state
   *        - {Object} actions
   *        - {Object} mutations
   *        - {Array} plugins
   *        - {Boolean} strict
   */

  function Store() {
    var _this = this;

    var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
        _ref$state = _ref.state,
        state = _ref$state === undefined ? {} : _ref$state,
        _ref$mutations = _ref.mutations,
        mutations = _ref$mutations === undefined ? {} : _ref$mutations,
        _ref$modules = _ref.modules,
        modules = _ref$modules === undefined ? {} : _ref$modules,
        _ref$plugins = _ref.plugins,
        plugins = _ref$plugins === undefined ? [] : _ref$plugins,
        _ref$strict = _ref.strict,
        strict = _ref$strict === undefined ? false : _ref$strict;

    classCallCheck(this, Store);

    this._getterCacheId = 'vuex_store_' + uid++;
    this._dispatching = false;
    this._rootMutations = this._mutations = mutations;
    this._modules = modules;
    this._subscribers = [];
    // bind dispatch to self
    var dispatch = this.dispatch;
    this.dispatch = function () {
      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
        args[_key] = arguments[_key];
      }

      dispatch.apply(_this, args);
    };
    // use a Vue instance to store the state tree
    // suppress warnings just in case the user has added
    // some funky global mixins
    if (!Vue) {
      throw new Error('[vuex] must call Vue.use(Vuex) before creating a store instance.');
    }
    var silent = Vue.config.silent;
    Vue.config.silent = true;
    this._vm = new Vue({
      data: {
        state: state
      }
    });
    Vue.config.silent = silent;
    this._setupModuleState(state, modules);
    this._setupModuleMutations(modules);
    // add extra warnings in strict mode
    if (strict) {
      this._setupMutationCheck();
    }
    // apply plugins
    devtoolPlugin(this);
    plugins.forEach(function (plugin) {
      return plugin(_this);
    });
  }

  /**
   * Getter for the entire state tree.
   * Read only.
   *
   * @return {Object}
   */

  createClass(Store, [{
    key: 'replaceState',


    /**
     * Replace root state.
     *
     * @param {Object} state
     */

    value: function replaceState(state) {
      this._dispatching = true;
      this._vm.state = state;
      this._dispatching = false;
    }

    /**
     * Dispatch an action.
     *
     * @param {String} type
     */

  }, {
    key: 'dispatch',
    value: function dispatch(type) {
      var _this2 = this;

      for (var _len2 = arguments.length, payload = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
        payload[_key2 - 1] = arguments[_key2];
      }

      var silent = false;
      var isObjectStyleDispatch = false;
      // compatibility for object actions, e.g. FSA
      if ((typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object' && type.type && arguments.length === 1) {
        isObjectStyleDispatch = true;
        payload = type;
        if (type.silent) silent = true;
        type = type.type;
      }
      var handler = this._mutations[type];
      var state = this.state;
      if (handler) {
        this._dispatching = true;
        // apply the mutation
        if (Array.isArray(handler)) {
          handler.forEach(function (h) {
            isObjectStyleDispatch ? h(state, payload) : h.apply(undefined, [state].concat(toConsumableArray(payload)));
          });
        } else {
          isObjectStyleDispatch ? handler(state, payload) : handler.apply(undefined, [state].concat(toConsumableArray(payload)));
        }
        this._dispatching = false;
        if (!silent) {
          (function () {
            var mutation = isObjectStyleDispatch ? payload : { type: type, payload: payload };
            _this2._subscribers.forEach(function (sub) {
              return sub(mutation, state);
            });
          })();
        }
      } else {
        console.warn('[vuex] Unknown mutation: ' + type);
      }
    }

    /**
     * Watch state changes on the store.
     * Same API as Vue's $watch, except when watching a function,
     * the function gets the state as the first argument.
     *
     * @param {Function} fn
     * @param {Function} cb
     * @param {Object} [options]
     */

  }, {
    key: 'watch',
    value: function watch(fn, cb, options) {
      var _this3 = this;

      if (typeof fn !== 'function') {
        console.error('Vuex store.watch only accepts function.');
        return;
      }
      return this._vm.$watch(function () {
        return fn(_this3.state);
      }, cb, options);
    }

    /**
     * Subscribe to state changes. Fires after every mutation.
     */

  }, {
    key: 'subscribe',
    value: function subscribe(fn) {
      var subs = this._subscribers;
      if (subs.indexOf(fn) < 0) {
        subs.push(fn);
      }
      return function () {
        var i = subs.indexOf(fn);
        if (i > -1) {
          subs.splice(i, 1);
        }
      };
    }

    /**
     * Hot update mutations & modules.
     *
     * @param {Object} options
     *        - {Object} [mutations]
     *        - {Object} [modules]
     */

  }, {
    key: 'hotUpdate',
    value: function hotUpdate() {
      var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
          mutations = _ref2.mutations,
          modules = _ref2.modules;

      this._rootMutations = this._mutations = mutations || this._rootMutations;
      this._setupModuleMutations(modules || this._modules);
    }

    /**
     * Attach sub state tree of each module to the root tree.
     *
     * @param {Object} state
     * @param {Object} modules
     */

  }, {
    key: '_setupModuleState',
    value: function _setupModuleState(state, modules) {
      var _this4 = this;

      if (!isObject(modules)) return;

      Object.keys(modules).forEach(function (key) {
        var module = modules[key];

        // set this module's state
        Vue.set(state, key, module.state || {});

        // retrieve nested modules
        _this4._setupModuleState(state[key], module.modules);
      });
    }

    /**
     * Bind mutations for each module to its sub tree and
     * merge them all into one final mutations map.
     *
     * @param {Object} updatedModules
     */

  }, {
    key: '_setupModuleMutations',
    value: function _setupModuleMutations(updatedModules) {
      var modules = this._modules;
      Object.keys(updatedModules).forEach(function (key) {
        modules[key] = updatedModules[key];
      });
      var updatedMutations = this._createModuleMutations(modules, []);
      this._mutations = mergeObjects([this._rootMutations].concat(toConsumableArray(updatedMutations)));
    }

    /**
     * Helper method for _setupModuleMutations.
     * The method retrieve nested sub modules and
     * bind each mutations to its sub tree recursively.
     *
     * @param {Object} modules
     * @param {Array<String>} nestedKeys
     * @return {Array<Object>}
     */

  }, {
    key: '_createModuleMutations',
    value: function _createModuleMutations(modules, nestedKeys) {
      var _this5 = this;

      if (!isObject(modules)) return [];

      return Object.keys(modules).map(function (key) {
        var module = modules[key];
        var newNestedKeys = nestedKeys.concat(key);

        // retrieve nested modules
        var nestedMutations = _this5._createModuleMutations(module.modules, newNestedKeys);

        if (!module || !module.mutations) {
          return mergeObjects(nestedMutations);
        }

        // bind mutations to sub state tree
        var mutations = {};
        Object.keys(module.mutations).forEach(function (name) {
          var original = module.mutations[name];
          mutations[name] = function (state) {
            for (var _len3 = arguments.length, args = Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
              args[_key3 - 1] = arguments[_key3];
            }

            original.apply(undefined, [getNestedState(state, newNestedKeys)].concat(args));
          };
        });

        // merge mutations of this module and nested modules
        return mergeObjects([mutations].concat(toConsumableArray(nestedMutations)));
      });
    }

    /**
     * Setup mutation check: if the Vuex instance's state is mutated
     * outside of a mutation handler, we throw en error. This effectively
     * enforces all mutations to the state to be trackable and hot-reloadable.
     * However, this comes at a run time cost since we are doing a deep
     * watch on the entire state tree, so it is only enabled if the
     * strict option is set to true.
     */

  }, {
    key: '_setupMutationCheck',
    value: function _setupMutationCheck() {
      var _this6 = this;

      var Watcher = getWatcher(this._vm);
      /* eslint-disable no-new */
      new Watcher(this._vm, 'state', function () {
        if (!_this6._dispatching) {
          throw new Error('[vuex] Do not mutate vuex store state outside mutation handlers.');
        }
      }, { deep: true, sync: true });
      /* eslint-enable no-new */
    }
  }, {
    key: 'state',
    get: function get$$1() {
      return this._vm.state;
    },
    set: function set$$1(v) {
      throw new Error('[vuex] Use store.replaceState() to explicit replace store state.');
    }
  }]);
  return Store;
}();

function install(_Vue) {
  if (Vue) {
    console.warn('[vuex] already installed. Vue.use(Vuex) should be called only once.');
    return;
  }
  Vue = _Vue;
  override(Vue);
}

// auto install in dist mode
if (typeof window !== 'undefined' && window.Vue) {
  install(window.Vue);
}

var index = {
  Store: Store,
  install: install
};

return index;

})));