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75 lines
2.0 KiB
75 lines
2.0 KiB
10 years ago
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"use strict";
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/* jshint -W058 */
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var Cancellation = require("./Cancellation");
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var Redirect = require("./Redirect");
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/**
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* Encapsulates a transition to a given path.
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*
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* The willTransitionTo and willTransitionFrom handlers receive
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* an instance of this class as their first argument.
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*/
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function Transition(path, retry) {
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this.path = path;
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this.abortReason = null;
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// TODO: Change this to router.retryTransition(transition)
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this.retry = retry.bind(this);
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}
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Transition.prototype.abort = function (reason) {
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if (this.abortReason == null) this.abortReason = reason || "ABORT";
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};
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Transition.prototype.redirect = function (to, params, query) {
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this.abort(new Redirect(to, params, query));
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};
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Transition.prototype.cancel = function () {
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this.abort(new Cancellation());
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};
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Transition.from = function (transition, routes, components, callback) {
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routes.reduce(function (callback, route, index) {
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return function (error) {
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if (error || transition.abortReason) {
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callback(error);
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} else if (route.onLeave) {
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try {
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route.onLeave(transition, components[index], callback);
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// If there is no callback in the argument list, call it automatically.
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if (route.onLeave.length < 3) callback();
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} catch (e) {
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callback(e);
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}
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} else {
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callback();
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}
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};
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}, callback)();
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};
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Transition.to = function (transition, routes, params, query, callback) {
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routes.reduceRight(function (callback, route) {
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return function (error) {
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if (error || transition.abortReason) {
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callback(error);
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} else if (route.onEnter) {
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try {
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route.onEnter(transition, params, query, callback);
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// If there is no callback in the argument list, call it automatically.
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if (route.onEnter.length < 4) callback();
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} catch (e) {
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callback(e);
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}
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} else {
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callback();
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}
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};
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}, callback)();
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};
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module.exports = Transition;
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