/**
 * State-based routing for AngularJS 1.x
 * @version v1.0.22
 * @link https://ui-router.github.io
 * @license MIT License, http://www.opensource.org/licenses/MIT
 */
(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('angular')) :
    typeof define === 'function' && define.amd ? define(['exports', 'angular'], factory) :
    (global = global || self, factory(global['@uirouter/angularjs-state-events'] = {}, global.angular));
}(this, function (exports, ng_from_import) { 'use strict';

    /** @publicapi @module ng1 */ /** */
    /** @hidden */ var ng_from_global = angular;
    /** @hidden */ var ng = ng_from_import && ng_from_import.module ? ng_from_import : ng_from_global;

    /**
     * # Legacy state events
     *
     * Polyfill implementation of the UI-Router 0.2.x state events.
     *
     * The 0.2.x state events are deprecated.  We recommend moving to Transition Hooks instead, as they
     * provide much more flexibility, support async, and provide the context (the Transition, etc) necessary
     * to implement meaningful application behaviors.
     *
     * To enable these state events, include the `stateEvents.js` file in your project, e.g.,
     * ```
     * <script src="stateEvents.js"></script>
     * ```
     * and also make sure you depend on the `ui.router.state.events` angular module, e.g.,
     * ```
     * angular.module("myApplication", ['ui.router', 'ui.router.state.events']
     * ```
     *
     * @publicapi @module ng1_state_events
     */ /** */
    /**
     * An event broadcast on `$rootScope` when the state transition **begins**.
     *
     * ### Deprecation warning: use [[TransitionService.onStart]] instead
     *
     * You can use `event.preventDefault()`
     * to prevent the transition from happening and then the transition promise will be
     * rejected with a `'transition prevented'` value.
     *
     * Additional arguments to the event handler are provided:
     * - `toState`: the Transition Target state
     * - `toParams`: the Transition Target Params
     * - `fromState`: the state the transition is coming from
     * - `fromParams`: the parameters from the state the transition is coming from
     * - `options`: any Transition Options
     * - `$transition$`: the [[Transition]]
     *
     * #### Example:
     * ```js
     * $rootScope.$on('$stateChangeStart', function(event, transition) {
     *   event.preventDefault();
     *   // transitionTo() promise will be rejected with
     *   // a 'transition prevented' error
     * })
     * ```
     *
     * @event $stateChangeStart
     * @deprecated
     */
    var $stateChangeStart;
    /**
     * An event broadcast on `$rootScope` if a transition is **cancelled**.
     *
     * ### Deprecation warning: use [[TransitionService.onStart]] instead
     *
     * Additional arguments to the event handler are provided:
     * - `toState`: the Transition Target state
     * - `toParams`: the Transition Target Params
     * - `fromState`: the state the transition is coming from
     * - `fromParams`: the parameters from the state the transition is coming from
     * - `options`: any Transition Options
     * - `$transition$`: the [[Transition]] that was cancelled
     *
     * @event $stateChangeCancel
     * @deprecated
     */
    var $stateChangeCancel;
    /**
     * An event broadcast on `$rootScope` once the state transition is **complete**.
     *
     * ### Deprecation warning: use [[TransitionService.onStart]] and [[Transition.promise]], or [[Transition.onSuccess]]
     *
     * Additional arguments to the event handler are provided:
     * - `toState`: the Transition Target state
     * - `toParams`: the Transition Target Params
     * - `fromState`: the state the transition is coming from
     * - `fromParams`: the parameters from the state the transition is coming from
     * - `options`: any Transition Options
     * - `$transition$`: the [[Transition]] that just succeeded
     *
     * @event $stateChangeSuccess
     * @deprecated
     */
    var $stateChangeSuccess;
    /**
     * An event broadcast on `$rootScope` when an **error occurs** during transition.
     *
     * ### Deprecation warning: use [[TransitionService.onStart]] and [[Transition.promise]], or [[Transition.onError]]
     *
     * It's important to note that if you
     * have any errors in your resolve functions (javascript errors, non-existent services, etc)
     * they will not throw traditionally. You must listen for this $stateChangeError event to
     * catch **ALL** errors.
     *
     * Additional arguments to the event handler are provided:
     * - `toState`: the Transition Target state
     * - `toParams`: the Transition Target Params
     * - `fromState`: the state the transition is coming from
     * - `fromParams`: the parameters from the state the transition is coming from
     * - `error`: The reason the transition errored.
     * - `options`: any Transition Options
     * - `$transition$`: the [[Transition]] that errored
     *
     * @event $stateChangeError
     * @deprecated
     */
    var $stateChangeError;
    /**
     * An event broadcast on `$rootScope` when a requested state **cannot be found** using the provided state name.
     *
     * ### Deprecation warning: use [[StateService.onInvalid]] instead
     *
     * The event is broadcast allowing any handlers a single chance to deal with the error (usually by
     * lazy-loading the unfound state). A `TargetState` object is passed to the listener handler,
     * you can see its properties in the example. You can use `event.preventDefault()` to abort the
     * transition and the promise returned from `transitionTo()` will be rejected with a
     * `'transition aborted'` error.
     *
     * Additional arguments to the event handler are provided:
     * - `unfoundState` Unfound State information. Contains: `to, toParams, options` properties.
     * - `fromState`: the state the transition is coming from
     * - `fromParams`: the parameters from the state the transition is coming from
     * - `options`: any Transition Options
     *
     * #### Example:
     * ```js
     * // somewhere, assume lazy.state has not been defined
     * $state.go("lazy.state", { a: 1, b: 2 }, { inherit: false });
     *
     * // somewhere else
     * $scope.$on('$stateNotFound', function(event, transition) {
     * function(event, unfoundState, fromState, fromParams){
     *     console.log(unfoundState.to); // "lazy.state"
     *     console.log(unfoundState.toParams); // {a:1, b:2}
     *     console.log(unfoundState.options); // {inherit:false} + default options
     * });
     * ```
     *
     * @event $stateNotFound
     * @deprecated
     */
    var $stateNotFound;
    (function () {
        var isFunction = ng.isFunction, isString = ng.isString;
        function applyPairs(memo, keyValTuple) {
            var key, value;
            if (Array.isArray(keyValTuple))
                key = keyValTuple[0], value = keyValTuple[1];
            if (!isString(key))
                throw new Error('invalid parameters to applyPairs');
            memo[key] = value;
            return memo;
        }
        function stateChangeStartHandler($transition$) {
            if (!$transition$.options().notify || !$transition$.valid() || $transition$.ignored())
                return;
            var $injector = $transition$.injector();
            var $stateEvents = $injector.get('$stateEvents');
            var $rootScope = $injector.get('$rootScope');
            var $state = $injector.get('$state');
            var $urlRouter = $injector.get('$urlRouter');
            var enabledEvents = $stateEvents.provider.enabled();
            var toParams = $transition$.params('to');
            var fromParams = $transition$.params('from');
            if (enabledEvents.$stateChangeSuccess) {
                var startEvent = $rootScope.$broadcast('$stateChangeStart', $transition$.to(), toParams, $transition$.from(), fromParams, $transition$.options(), $transition$);
                if (startEvent.defaultPrevented) {
                    if (enabledEvents.$stateChangeCancel) {
                        $rootScope.$broadcast('$stateChangeCancel', $transition$.to(), toParams, $transition$.from(), fromParams, $transition$.options(), $transition$);
                    }
                    // Don't update and resync url if there's been a new transition started. see issue #2238, #600
                    if ($state.transition == null)
                        $urlRouter.update();
                    return false;
                }
                // right after global state is updated
                var successOpts = { priority: 9999 };
                $transition$.onSuccess({}, function () {
                    $rootScope.$broadcast('$stateChangeSuccess', $transition$.to(), toParams, $transition$.from(), fromParams, $transition$.options(), $transition$);
                }, successOpts);
            }
            if (enabledEvents.$stateChangeError) {
                $transition$.promise['catch'](function (error) {
                    if (error && (error.type === 2 /* RejectType.SUPERSEDED */ || error.type === 3) /* RejectType.ABORTED */)
                        return;
                    var evt = $rootScope.$broadcast('$stateChangeError', $transition$.to(), toParams, $transition$.from(), fromParams, error, $transition$.options(), $transition$);
                    if (!evt.defaultPrevented) {
                        $urlRouter.update();
                    }
                });
            }
        }
        stateNotFoundHandler.$inject = ['$to$', '$from$', '$state', '$rootScope', '$urlRouter'];
        function stateNotFoundHandler($to$, $from$, injector) {
            var $state = injector.get('$state');
            var $rootScope = injector.get('$rootScope');
            var $urlRouter = injector.get('$urlRouter');
            var redirect = { to: $to$.identifier(), toParams: $to$.params(), options: $to$.options() };
            var e = $rootScope.$broadcast('$stateNotFound', redirect, $from$.state(), $from$.params());
            if (e.defaultPrevented || e.retry)
                $urlRouter.update();
            function redirectFn() {
                return $state.target(redirect.to, redirect.toParams, redirect.options);
            }
            if (e.defaultPrevented) {
                return false;
            }
            else if (e.retry || !!$state.get(redirect.to)) {
                return e.retry && isFunction(e.retry.then) ? e.retry.then(redirectFn) : redirectFn();
            }
        }
        $StateEventsProvider.$inject = ['$stateProvider'];
        function $StateEventsProvider($stateProvider) {
            $StateEventsProvider.prototype.instance = this;
            var runtime = false;
            var allEvents = ['$stateChangeStart', '$stateNotFound', '$stateChangeSuccess', '$stateChangeError'];
            var enabledStateEvents = allEvents.map(function (e) { return [e, true]; }).reduce(applyPairs, {});
            function assertNotRuntime() {
                if (runtime)
                    throw new Error('Cannot enable events at runtime (use $stateEventsProvider');
            }
            /**
             * Enables the deprecated UI-Router 0.2.x State Events
             * [ '$stateChangeStart', '$stateNotFound', '$stateChangeSuccess', '$stateChangeError' ]
             */
            this.enable = function () {
                var events = [];
                for (var _i = 0; _i < arguments.length; _i++) {
                    events[_i] = arguments[_i];
                }
                assertNotRuntime();
                if (!events || !events.length)
                    events = allEvents;
                events.forEach(function (event) { return (enabledStateEvents[event] = true); });
            };
            /**
             * Disables the deprecated UI-Router 0.2.x State Events
             * [ '$stateChangeStart', '$stateNotFound', '$stateChangeSuccess', '$stateChangeError' ]
             */
            this.disable = function () {
                var events = [];
                for (var _i = 0; _i < arguments.length; _i++) {
                    events[_i] = arguments[_i];
                }
                assertNotRuntime();
                if (!events || !events.length)
                    events = allEvents;
                events.forEach(function (event) { return delete enabledStateEvents[event]; });
            };
            this.enabled = function () { return enabledStateEvents; };
            this.$get = $get;
            $get.$inject = ['$transitions'];
            function $get($transitions) {
                runtime = true;
                if (enabledStateEvents['$stateNotFound'])
                    $stateProvider.onInvalid(stateNotFoundHandler);
                if (enabledStateEvents.$stateChangeStart)
                    $transitions.onBefore({}, stateChangeStartHandler, { priority: 1000 });
                return {
                    provider: $StateEventsProvider.prototype.instance,
                };
            }
        }
        ng
            .module('ui.router.state.events', ['ui.router.state'])
            .provider('$stateEvents', $StateEventsProvider)
            .run([
            '$stateEvents',
            function ($stateEvents) {
                /* Invokes $get() */
            },
        ]);
    })();

    exports.$stateChangeStart = $stateChangeStart;
    exports.$stateChangeCancel = $stateChangeCancel;
    exports.$stateChangeSuccess = $stateChangeSuccess;
    exports.$stateChangeError = $stateChangeError;
    exports.$stateNotFound = $stateNotFound;

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

}));
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