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"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; };

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

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

var React = require("react");
var PropTypes = require("prop-types");

var ALL_INITIALIZERS = [];
var READY_INITIALIZERS = [];

function isWebpackReady(getModuleIds) {
  if ((typeof __webpack_modules__ === "undefined" ? "undefined" : _typeof(__webpack_modules__)) !== "object") {
    return false;
  }

return getModuleIds().every(function (moduleId) {
    return typeof moduleId !== "undefined" && typeof __webpack_modules__[moduleId] !== "undefined";
  });
}

function load(loader) {
  var promise = loader();

var state = {
    loading: true,
    loaded: null,
    error: null
  };

state.promise = promise.then(function (loaded) {
    state.loading = false;
    state.loaded = loaded;
    return loaded;
  }).catch(function (err) {
    state.loading = false;
    state.error = err;
    throw err;
  });

return state;
}

function loadMap(obj) {
  var state = {
    loading: false,
    loaded: {},
    error: null
  };

var promises = [];

try {
    Object.keys(obj).forEach(function (key) {
      var result = load(obj[key]);

if (!result.loading) {
        state.loaded[key] = result.loaded;
        state.error = result.error;
      } else {
        state.loading = true;
      }

promises.push(result.promise);

result.promise.then(function (res) {
        state.loaded[key] = res;
      }).catch(function (err) {
        state.error = err;
      });
    });
  } catch (err) {
    state.error = err;
  }

state.promise = Promise.all(promises).then(function (res) {
    state.loading = false;
    return res;
  }).catch(function (err) {
    state.loading = false;
    throw err;
  });

return state;
}

function resolve(obj) {
  return obj && obj.__esModule ? obj.default : obj;
}

function render(loaded, props) {
  return React.createElement(resolve(loaded), props);
}

function createLoadableComponent(loadFn, options) {
  var _class, _temp;

if (!options.loading) {
    throw new Error("react-loadable requires a `loading` component");
  }

var opts = Object.assign({
    loader: null,
    loading: null,
    delay: 200,
    timeout: null,
    render: render,
    webpack: null,
    modules: null
  }, options);

var res = null;

function init() {
    if (!res) {
      res = loadFn(opts.loader);
    }
    return res.promise;
  }

ALL_INITIALIZERS.push(init);

if (typeof opts.webpack === "function") {
    READY_INITIALIZERS.push(function () {
      if (isWebpackReady(opts.webpack)) {
        return init();
      }
    });
  }

return _temp = _class = function (_React$Component) {
    _inherits(LoadableComponent, _React$Component);

function LoadableComponent(props) {
      _classCallCheck(this, LoadableComponent);

var _this = _possibleConstructorReturn(this, _React$Component.call(this, props));

_this.retry = function () {
        _this.setState({ error: null, loading: true, timedOut: false });
        res = loadFn(opts.loader);
        _this._loadModule();
      };

init();

_this.state = {
        error: res.error,
        pastDelay: false,
        timedOut: false,
        loading: res.loading,
        loaded: res.loaded
      };
      return _this;
    }

LoadableComponent.preload = function preload() {
      return init();
    };

LoadableComponent.prototype.componentWillMount = function componentWillMount() {
      this._mounted = true;
      this._loadModule();
    };

LoadableComponent.prototype._loadModule = function _loadModule() {
      var _this2 = this;

if (this.context.loadable && Array.isArray(opts.modules)) {
        opts.modules.forEach(function (moduleName) {
          _this2.context.loadable.report(moduleName);
        });
      }

if (!res.loading) {
        return;
      }

if (typeof opts.delay === "number") {
        if (opts.delay === 0) {
          this.setState({ pastDelay: true });
        } else {
          this._delay = setTimeout(function () {
            _this2.setState({ pastDelay: true });
          }, opts.delay);
        }
      }

if (typeof opts.timeout === "number") {
        this._timeout = setTimeout(function () {
          _this2.setState({ timedOut: true });
        }, opts.timeout);
      }

var update = function update() {
        if (!_this2._mounted) {
          return;
        }

_this2.setState({
          error: res.error,
          loaded: res.loaded,
          loading: res.loading
        });

_this2._clearTimeouts();
      };

res.promise.then(function () {
        update();
      }).catch(function (err) {
        update();
      });
    };

LoadableComponent.prototype.componentWillUnmount = function componentWillUnmount() {
      this._mounted = false;
      this._clearTimeouts();
    };

LoadableComponent.prototype._clearTimeouts = function _clearTimeouts() {
      clearTimeout(this._delay);
      clearTimeout(this._timeout);
    };

LoadableComponent.prototype.render = function render() {
      if (this.state.loading || this.state.error) {
        return React.createElement(opts.loading, {
          isLoading: this.state.loading,
          pastDelay: this.state.pastDelay,
          timedOut: this.state.timedOut,
          error: this.state.error,
          retry: this.retry
        });
      } else if (this.state.loaded) {
        return opts.render(this.state.loaded, this.props);
      } else {
        return null;
      }
    };

return LoadableComponent;
  }(React.Component), _class.contextTypes = {
    loadable: PropTypes.shape({
      report: PropTypes.func.isRequired
    })
  }, _temp;
}

function Loadable(opts) {
  return createLoadableComponent(load, opts);
}

function LoadableMap(opts) {
  if (typeof opts.render !== "function") {
    throw new Error("LoadableMap requires a `render(loaded, props)` function");
  }

return createLoadableComponent(loadMap, opts);
}

Loadable.Map = LoadableMap;

var Capture = function (_React$Component2) {
  _inherits(Capture, _React$Component2);

function Capture() {
    _classCallCheck(this, Capture);

return _possibleConstructorReturn(this, _React$Component2.apply(this, arguments));
  }

Capture.prototype.getChildContext = function getChildContext() {
    return {
      loadable: {
        report: this.props.report
      }
    };
  };

Capture.prototype.render = function render() {
    return React.Children.only(this.props.children);
  };

return Capture;
}(React.Component);

Capture.propTypes = {
  report: PropTypes.func.isRequired
};
Capture.childContextTypes = {
  loadable: PropTypes.shape({
    report: PropTypes.func.isRequired
  }).isRequired
};

Loadable.Capture = Capture;

function flushInitializers(initializers) {
  var promises = [];

while (initializers.length) {
    var init = initializers.pop();
    promises.push(init());
  }

return Promise.all(promises).then(function () {
    if (initializers.length) {
      return flushInitializers(initializers);
    }
  });
}

Loadable.preloadAll = function () {
  return new Promise(function (resolve, reject) {
    flushInitializers(ALL_INITIALIZERS).then(resolve, reject);
  });
};

Loadable.preloadReady = function () {
  return new Promise(function (resolve, reject) {
    // We always will resolve, errors should be handled within loading UIs.
    flushInitializers(READY_INITIALIZERS).then(resolve, resolve);
  });
};

module.exports = Loadable;