angular-aap-auth
Version:
## This library is deprecated. Please, use [ng-ebi-authorization](https://www.npmjs.com/package/ng-ebi-authorization).
547 lines (546 loc) • 46.1 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes} checked by tsc
*/
import { Injectable, Inject, RendererFactory2 } from '@angular/core';
import { BehaviorSubject, } from 'rxjs';
import { map } from 'rxjs/operators';
import { AAP_CONFIG } from './auth.config';
import { TokenService } from './token.service';
/**
* @record
*/
export function LoginOptions() { }
function LoginOptions_tsickle_Closure_declarations() {
/* TODO: handle strange member:
[key: string]: string;
*/
}
/**
* @record
*/
export function Credentials() { }
function Credentials_tsickle_Closure_declarations() {
/** @type {?} */
Credentials.prototype.realname;
/** @type {?} */
Credentials.prototype.username;
/** @type {?} */
Credentials.prototype.token;
}
var AuthService = /** @class */ (function () {
function AuthService(_rendererFactory, _tokenService, config) {
var _this = this;
this._rendererFactory = _rendererFactory;
this._tokenService = _tokenService;
this.config = config;
this._credentials = new BehaviorSubject(null);
this._loginCallbacks = [];
this._logoutCallbacks = [];
this._timeoutID = null;
this._commKeyName = 'AngularAapAuthUpdated';
this._commKeyUpdater = function () { return localStorage.setItem(_this._commKeyName, '' + new Date().getTime()); };
this._domain = encodeURIComponent(window.location.origin);
this._appURL = config.aapURL.replace(/\/$/, '');
this._storageUpdater = config.tokenUpdater;
if (config.tokenRemover) {
this._storageRemover = config.tokenRemover;
}
else {
this._storageRemover = function () { return config.tokenUpdater(null); };
}
var /** @type {?} */ renderer = this._rendererFactory.createRenderer(null, null);
this._listenLoginMessage(renderer);
this._listenChangesFromOtherWindows(renderer);
this._updateCredentials(); // TODO: experiment with setTimeOut
}
/**
* @return {?}
*/
AuthService.prototype.isAuthenticated = /**
* @return {?}
*/
function () {
return this._credentials.asObservable().pipe(map(function (credentials) { return credentials ? true : false; }));
};
/**
* @return {?}
*/
AuthService.prototype.credentials = /**
* @return {?}
*/
function () {
return this._credentials.asObservable();
};
/**
* @return {?}
*/
AuthService.prototype.realname = /**
* @return {?}
*/
function () {
return this._credentials.asObservable().pipe(map(function (credentials) { return credentials ? credentials.realname : null; }));
};
/**
* @return {?}
*/
AuthService.prototype.username = /**
* @return {?}
*/
function () {
return this._credentials.asObservable().pipe(map(function (credentials) { return credentials ? credentials.username : null; }));
};
/**
* @return {?}
*/
AuthService.prototype.token = /**
* @return {?}
*/
function () {
return this._credentials.asObservable().pipe(map(function (credentials) { return credentials ? credentials.token : null; }));
};
/**
* Functions that opens a window instead of a tab.
*
* See method _filterLoginOptions regarding security risks of certain
* LoginOptions.
*
* @param {?=} loginOptions Options passed as URL parameters to the SSO.
* @param {?=} width Pixel width of the login window.
* @param {?=} height Pixel height of the login window.
* @param {?=} top Position of the top corners. If it is a negative
* number it centres the login window on the screen.
* @param {?=} left Position of the left corners. If it is a negative
* number it centres the login window on the screen.
* @return {?}
*/
AuthService.prototype.windowOpen = /**
* Functions that opens a window instead of a tab.
*
* See method _filterLoginOptions regarding security risks of certain
* LoginOptions.
*
* @param {?=} loginOptions Options passed as URL parameters to the SSO.
* @param {?=} width Pixel width of the login window.
* @param {?=} height Pixel height of the login window.
* @param {?=} top Position of the top corners. If it is a negative
* number it centres the login window on the screen.
* @param {?=} left Position of the left corners. If it is a negative
* number it centres the login window on the screen.
* @return {?}
*/
function (loginOptions, width, height, top, left) {
if (width === void 0) { width = 650; }
if (height === void 0) { height = 1000; }
if (top === void 0) { top = -1; }
if (left === void 0) { left = -1; }
if (left < 0) {
var /** @type {?} */ screenWidth = screen.width;
if (screenWidth > width) {
left = Math.round(screenWidth / 2 - width / 2);
}
}
if (top < 0) {
var /** @type {?} */ screenHeight = screen.height;
if (screenHeight > height) {
top = Math.round(screenHeight / 2 - height / 2);
}
}
var /** @type {?} */ windowOptions = [
"width=" + width,
"height=" + height,
"left=" + left,
"top=" + top,
'personalbar=no',
'toolbar=no',
'scrollbars=yes',
'resizable=yes',
'directories=no',
'location=no',
'menubar=no',
'titlebar=no',
'toolbar=no'
];
var /** @type {?} */ loginWindow = window.open(this.getSSOURL(loginOptions), 'Sign in to Elixir', windowOptions.join(','));
if (loginWindow) {
loginWindow.focus();
}
};
/**
* Functions that opens a tab (in modern browser).
*
* See method _filterLoginOptions regarding security risks of certain
* LoginOptions.
*
* @param {?=} loginOptions Options passed as URL parameters to the SSO.
* @return {?}
*/
AuthService.prototype.tabOpen = /**
* Functions that opens a tab (in modern browser).
*
* See method _filterLoginOptions regarding security risks of certain
* LoginOptions.
*
* @param {?=} loginOptions Options passed as URL parameters to the SSO.
* @return {?}
*/
function (loginOptions) {
var /** @type {?} */ loginWindow = window.open(this.getSSOURL(loginOptions), 'Sign in to Elixir');
if (loginWindow) {
loginWindow.focus();
}
};
/**
* Produces a URL that allows logging into the single sign on (SSO) page.
* The URL cans be opened in a new tab using target="_blank",
* or in a new window using window.open().
*
* See method _filterLoginOptions regarding security risks of certain
* LoginOptions.
*
* @param {?=} options
* @return {?} The SSO URL.
*
*/
AuthService.prototype.getSSOURL = /**
* Produces a URL that allows logging into the single sign on (SSO) page.
* The URL cans be opened in a new tab using target="_blank",
* or in a new window using window.open().
*
* See method _filterLoginOptions regarding security risks of certain
* LoginOptions.
*
* @param {?=} options
* @return {?} The SSO URL.
*
*/
function (options) {
var /** @type {?} */ extra = '';
if (options) {
this._filterLoginOptions(options);
extra = Object.keys(options)
.map(function (key) { return [key, options[key]]; })
.reduce(function (accumulator, keyvalue) { return accumulator + "&" + keyvalue[0] + "=" + keyvalue[1]; }, '');
}
return this._appURL + "/sso?from=" + this._domain + extra;
};
/**
* Filters options that are unsecure.
*
* See the advance options that can be requested through the options parameter:
* https://api.aai.ebi.ac.uk/docs/authentication/authentication.index.html#_common_attributes
*
* The time to live paramenter (ttl) default value is 60 minutes. It is a
* big security risk to request longer ttl. If a third party gets hold of
* such token, means that they could use it for a day, week, year
* (essentially, like having the username/password).
*
* @param {?} options
* @return {?}
*/
AuthService.prototype._filterLoginOptions = /**
* Filters options that are unsecure.
*
* See the advance options that can be requested through the options parameter:
* https://api.aai.ebi.ac.uk/docs/authentication/authentication.index.html#_common_attributes
*
* The time to live paramenter (ttl) default value is 60 minutes. It is a
* big security risk to request longer ttl. If a third party gets hold of
* such token, means that they could use it for a day, week, year
* (essentially, like having the username/password).
*
* @param {?} options
* @return {?}
*/
function (options) {
if (Object.keys(options).indexOf('ttl') > -1) {
var /** @type {?} */ ttl = +options['ttl'];
var /** @type {?} */ softLimit = 60;
var /** @type {?} */ hardLimit = 60 * 24;
if (ttl > hardLimit) {
window.console.error("Login requested with an expiration longer than " + hardLimit + " minutes! This is not allowed.");
window.console.error("Expiration request reset to " + hardLimit + " minutes.");
options['ttl'] = '' + hardLimit;
}
else if (ttl > softLimit) {
window.console.warn("Login requested with an expiration longer than " + softLimit + " minutes!");
}
}
};
/**
* Functions that logs out the user.
* It triggers the logout callbacks.
* It is an arrow function (lambda) because in that way it has a reference
* to 'this' when used in setTimeout call.
* @return {?}
*/
AuthService.prototype.logOut = /**
* Functions that logs out the user.
* It triggers the logout callbacks.
* It is an arrow function (lambda) because in that way it has a reference
* to 'this' when used in setTimeout call.
* @return {?}
*/
function () {
this._storageRemover();
this._updateCredentials();
// Triggers updating other windows
this._commKeyUpdater();
};
/**
* Add a callback to the LogIn event.
*
* @param {?} callback The Function called when the login event is triggered and the
* JWT token is received and accepted.
*
* @return {?} The event registration id (necessary to unregister the event).
*/
AuthService.prototype.addLogInEventListener = /**
* Add a callback to the LogIn event.
*
* @param {?} callback The Function called when the login event is triggered and the
* JWT token is received and accepted.
*
* @return {?} The event registration id (necessary to unregister the event).
*/
function (callback) {
return this._loginCallbacks.push(callback);
};
/**
* Remove a callback from the LogIn event.
*
* @param {?} id The id given when event listener was added.
*
* @return {?} true when remove successfully, false otherwise.
*/
AuthService.prototype.removeLogInEventListener = /**
* Remove a callback from the LogIn event.
*
* @param {?} id The id given when event listener was added.
*
* @return {?} true when remove successfully, false otherwise.
*/
function (id) {
return delete this._loginCallbacks[id - 1];
};
/**
* Add a callback to the LogOut event.
*
* @param {?} callback The Function called when the logout event is triggered and the
* JWT token is received and accepted.
*
* @return {?} The registration id (necessary to unregister the event).
*/
AuthService.prototype.addLogOutEventListener = /**
* Add a callback to the LogOut event.
*
* @param {?} callback The Function called when the logout event is triggered and the
* JWT token is received and accepted.
*
* @return {?} The registration id (necessary to unregister the event).
*/
function (callback) {
return this._logoutCallbacks.push(callback);
};
/**
* Remove a callback from the LogOut event.
*
* @param {?} id The id given when event listener was added.
*
* @return {?} true when remove successfully, false otherwise.
*/
AuthService.prototype.removeLogOutEventListener = /**
* Remove a callback from the LogOut event.
*
* @param {?} id The id given when event listener was added.
*
* @return {?} true when remove successfully, false otherwise.
*/
function (id) {
return delete this._logoutCallbacks[id - 1];
};
/**
* Listen for login messages from other windows.
* These messages contain the tokens from the AAP.
* If a token is received then the callbacks are triggered.
* @param {?} renderer
* @return {?}
*/
AuthService.prototype._listenLoginMessage = /**
* Listen for login messages from other windows.
* These messages contain the tokens from the AAP.
* If a token is received then the callbacks are triggered.
* @param {?} renderer
* @return {?}
*/
function (renderer) {
var _this = this;
renderer.listen('window', 'message', function (event) {
if (!_this.messageIsAcceptable(event)) {
return;
}
_this._storageUpdater(event.data);
event.source.close();
_this._updateCredentials();
// Triggers updating other windows
// Triggers updating other windows
_this._commKeyUpdater();
});
};
/**
* Listen to changes in the token from *other* windows.
*
* For inter-window communication messages are transmitted trough changes
* on a dummy storage key property: '_commKeyName'.
*
* Notice that changes in the '_commKeyName' produced by this class doesn't
* trigger this event.
* @param {?} renderer
* @return {?}
*/
AuthService.prototype._listenChangesFromOtherWindows = /**
* Listen to changes in the token from *other* windows.
*
* For inter-window communication messages are transmitted trough changes
* on a dummy storage key property: '_commKeyName'.
*
* Notice that changes in the '_commKeyName' produced by this class doesn't
* trigger this event.
* @param {?} renderer
* @return {?}
*/
function (renderer) {
var _this = this;
renderer.listen('window', 'storage', function (event) {
if (event.key === _this._commKeyName) {
_this._updateCredentials();
}
});
};
/**
* Check if the message is coming from the same domain we use to generate
* the SSO URL, otherwise it's iffy and shouldn't trust it.
* @param {?} event
* @return {?}
*/
AuthService.prototype.messageIsAcceptable = /**
* Check if the message is coming from the same domain we use to generate
* the SSO URL, otherwise it's iffy and shouldn't trust it.
* @param {?} event
* @return {?}
*/
function (event) {
return event.origin === this._appURL;
};
/**
* @return {?}
*/
AuthService.prototype._updateCredentials = /**
* @return {?}
*/
function () {
var _this = this;
var /** @type {?} */ isAuthenticated = this._loggedIn();
if (this._timeoutID) {
window.clearTimeout(this._timeoutID);
}
if (isAuthenticated) {
this._credentials.next({
realname: /** @type {?} */ (this._getRealName()),
username: /** @type {?} */ (this._getUserName()),
token: /** @type {?} */ (this._getToken())
});
this._loginCallbacks.map(function (callback) { return callback && callback(); });
// Schedule future logout event base on token expiration
var /** @type {?} */ expireDate = /** @type {?} */ (this._tokenService.getTokenExpirationDate());
// Coercing dates to numbers with the unary operator '+'
var /** @type {?} */ delay = +expireDate - +new Date();
this._timeoutID = window.setTimeout(function () { return _this.logOut(); }, delay);
}
else {
this._storageRemover(); // Cleanup possible left behind token
this._credentials.next(null);
this._logoutCallbacks.map(function (callback) { return callback && callback(); });
}
};
/**
* Check if there's a user logging on and whether the token is still valid.
*
* @return {?} Whether the user user is authenticated or not.
*/
AuthService.prototype._loggedIn = /**
* Check if there's a user logging on and whether the token is still valid.
*
* @return {?} Whether the user user is authenticated or not.
*/
function () {
return this._tokenService.isTokenValid();
};
/**
* @return {?}
*/
AuthService.prototype._getToken = /**
* @return {?}
*/
function () {
return this._tokenService.getToken();
};
/**
* @return {?}
*/
AuthService.prototype._getUserName = /**
* @return {?}
*/
function () {
return this._tokenService.getClaim('email', null);
};
/**
* @return {?}
*/
AuthService.prototype._getRealName = /**
* @return {?}
*/
function () {
return this._tokenService.getClaim('name', null);
};
AuthService.decorators = [
{ type: Injectable },
];
/** @nocollapse */
AuthService.ctorParameters = function () { return [
{ type: RendererFactory2 },
{ type: TokenService },
{ type: undefined, decorators: [{ type: Inject, args: [AAP_CONFIG,] }] }
]; };
return AuthService;
}());
export { AuthService };
function AuthService_tsickle_Closure_declarations() {
/** @type {?} */
AuthService.prototype._credentials;
/** @type {?} */
AuthService.prototype._loginCallbacks;
/** @type {?} */
AuthService.prototype._logoutCallbacks;
/** @type {?} */
AuthService.prototype._timeoutID;
/** @type {?} */
AuthService.prototype._domain;
/** @type {?} */
AuthService.prototype._appURL;
/** @type {?} */
AuthService.prototype._storageUpdater;
/** @type {?} */
AuthService.prototype._storageRemover;
/** @type {?} */
AuthService.prototype._commKeyName;
/** @type {?} */
AuthService.prototype._commKeyUpdater;
/** @type {?} */
AuthService.prototype._rendererFactory;
/** @type {?} */
AuthService.prototype._tokenService;
/** @type {?} */
AuthService.prototype.config;
}
//# 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{\n    Injectable,\n    Inject,\n    RendererFactory2,\n    Renderer2\n} from '@angular/core';\nimport {\n    Observable\n} from 'rxjs';\nimport {\n    BehaviorSubject,\n} from 'rxjs';\nimport {\n    map\n} from 'rxjs/operators';\n\nimport {\n    AAP_CONFIG,\n    AuthConfig\n} from './auth.config';\nimport {\n    TokenService\n} from './token.service';\n\nexport interface LoginOptions {\n    [key: string]: string;\n}\n\nexport interface Credentials {\n    realname: string;\n    username: string;\n    token: string;\n}\n\n@Injectable()\nexport class AuthService {\n\n    private _credentials = new BehaviorSubject < Credentials | null > (null);\n\n    private _loginCallbacks: Function[] = [];\n    private _logoutCallbacks: Function[] = [];\n\n    private _timeoutID: number | null = null;\n\n    // Configuration\n    private readonly _domain: string;\n    private readonly _appURL: string;\n    private readonly _storageUpdater: (newToken: any) => void;\n    private readonly _storageRemover: () => void;\n\n    // This two properties are used for inter-window communcation.\n    // It is achieve through the update of the dummy key storage '_commKeyName'\n    private readonly _commKeyName = 'AngularAapAuthUpdated';\n    private readonly _commKeyUpdater = () => localStorage.setItem(this._commKeyName, '' + new Date().getTime());\n\n    constructor(\n        private _rendererFactory: RendererFactory2,\n        private _tokenService: TokenService,\n        @Inject(AAP_CONFIG) private config: AuthConfig\n    ) {\n        this._domain = encodeURIComponent(window.location.origin);\n        this._appURL = config.aapURL.replace(/\\/$/, '');\n        this._storageUpdater = config.tokenUpdater;\n        if (config.tokenRemover) {\n            this._storageRemover = config.tokenRemover;\n        } else {\n            this._storageRemover = () => config.tokenUpdater(null);\n        }\n\n        const renderer = this._rendererFactory.createRenderer(null, null);\n        this._listenLoginMessage(renderer);\n        this._listenChangesFromOtherWindows(renderer);\n\n        this._updateCredentials(); // TODO: experiment with setTimeOut\n    }\n\n    public isAuthenticated(): Observable < boolean > {\n        return this._credentials.asObservable().pipe(\n            map(credentials => credentials ? true : false)\n        );\n    }\n\n    public credentials(): Observable < Credentials | null > {\n        return this._credentials.asObservable();\n    }\n\n    public realname(): Observable < string | null > {\n        return this._credentials.asObservable().pipe(\n            map(credentials => credentials ?  credentials.realname : null)\n        );\n    }\n\n    public username(): Observable < string | null > {\n        return this._credentials.asObservable().pipe(\n            map(credentials => credentials ?  credentials.username : null)\n        );\n    }\n\n    public token(): Observable < string | null > {\n        return this._credentials.asObservable().pipe(\n            map(credentials => credentials ?  credentials.token : null)\n        );\n    }\n\n    /**\n     * Functions that opens a window instead of a tab.\n     *\n     * See method _filterLoginOptions regarding security risks of certain\n     * LoginOptions.\n     *\n     * @param loginOptions Options passed as URL parameters to the SSO.\n     * @param width Pixel width of the login window.\n     * @param height Pixel height of the login window.\n     * @param top Position of the top corners. If it is a negative\n     *             number it centres the login window on the screen.\n     * @param left Position of the left corners. If it is a negative\n     *             number it centres the login window on the screen.\n     */\n    public windowOpen(loginOptions?: LoginOptions, width = 650, height = 1000, top = -1, left = -1) {\n        if (left < 0) {\n            const screenWidth = screen.width;\n            if (screenWidth > width) {\n                left = Math.round(screenWidth / 2 - width / 2);\n            }\n        }\n        if (top < 0) {\n            const screenHeight = screen.height;\n            if (screenHeight > height) {\n                top = Math.round(screenHeight / 2 - height / 2);\n            }\n        }\n\n        const windowOptions = [\n            `width=${width}`,\n            `height=${height}`,\n            `left=${left}`,\n            `top=${top}`,\n            'personalbar=no',\n            'toolbar=no',\n            'scrollbars=yes',\n            'resizable=yes',\n            'directories=no',\n            'location=no',\n            'menubar=no',\n            'titlebar=no',\n            'toolbar=no'\n        ];\n\n        const loginWindow = window.open(this.getSSOURL(loginOptions), 'Sign in to Elixir', windowOptions.join(','));\n        if (loginWindow) {\n            loginWindow.focus();\n        }\n    }\n\n    /**\n     * Functions that opens a tab (in modern browser).\n     *\n     * See method _filterLoginOptions regarding security risks of certain\n     * LoginOptions.\n     *\n     * @param loginOptions Options passed as URL parameters to the SSO.\n     */\n    public tabOpen(loginOptions?: LoginOptions) {\n        const loginWindow = window.open(this.getSSOURL(loginOptions), 'Sign in to Elixir');\n        if (loginWindow) {\n            loginWindow.focus();\n        }\n    }\n\n    /**\n     * Produces a URL that allows logging into the single sign on (SSO) page.\n     * The URL cans be opened in a new tab using target=\"_blank\",\n     * or in a new window using window.open().\n     *\n     * See method _filterLoginOptions regarding security risks of certain\n     * LoginOptions.\n     *\n     * @param  loginOptions Options passed as URL parameters to the SSO.\n     *\n     * @returns The SSO URL.\n     *\n     */\n        public getSSOURL(options?: LoginOptions): string {\n        let extra = '';\n        if (options) {\n            this._filterLoginOptions(options);\n            extra = Object.keys(options)\n                .map(key => [key, options[key]])\n                .reduce((accumulator, keyvalue) => `${accumulator}&${keyvalue[0]}=${keyvalue[1]}`, '');\n        }\n        return `${this._appURL}/sso?from=${this._domain}${extra}`;\n    }\n\n    /**\n     * Filters options that are unsecure.\n     *\n     * See the advance options that can be requested through the options parameter:\n     * https://api.aai.ebi.ac.uk/docs/authentication/authentication.index.html#_common_attributes\n     *\n     * The time to live paramenter (ttl) default value is 60 minutes. It is a\n     * big security risk to request longer ttl. If a third party gets hold of\n     * such token, means that they could use it for a day, week, year\n     * (essentially, like having the username/password).\n     *\n     * @param  loginOptions Options passed as URL parameters to the SSO.\n     *\n     *\n     */\n    public _filterLoginOptions(options: LoginOptions) {\n        if (Object.keys(options).indexOf('ttl') > -1) {\n            const ttl: number = +options['ttl'];\n            const softLimit = 60;\n            const hardLimit = 60 * 24;\n            if (ttl > hardLimit) {\n                window.console.error(`Login requested with an expiration longer than ${hardLimit} minutes! This is not allowed.`);\n                window.console.error(`Expiration request reset to ${hardLimit} minutes.`);\n                options['ttl'] = '' + hardLimit;\n            } else if (ttl > softLimit) {\n                window.console.warn(`Login requested with an expiration longer than ${softLimit} minutes!`);\n            }\n        }\n    }\n\n    /**\n     * Functions that logs out the user.\n     * It triggers the logout callbacks.\n     * It is an arrow function (lambda) because in that way it has a reference\n     * to 'this' when used in setTimeout call.\n     */\n    public logOut() {\n        this._storageRemover();\n        this._updateCredentials();\n\n        // Triggers updating other windows\n        this._commKeyUpdater();\n    }\n\n    /**\n     * Add a callback to the LogIn event.\n     *\n     * @param callback The Function called when the login event is triggered and the\n     *    JWT token is received and accepted.\n     *\n     * @returns The event registration id (necessary to unregister the event).\n     */\n    public addLogInEventListener(callback: Function): number {\n        return this._loginCallbacks.push(callback);\n    }\n\n    /**\n     * Remove a callback from the LogIn event.\n     *\n     * @param id The id given when event listener was added.\n     *\n     * @returns true when remove successfully, false otherwise.\n     */\n    public removeLogInEventListener(id: number): boolean {\n        return delete this._loginCallbacks[id - 1];\n    }\n\n    /**\n     * Add a callback to the LogOut event.\n     *\n     * @param callback The Function called when the logout event is triggered and the\n     *    JWT token is received and accepted.\n     *\n     * @returns The registration id (necessary to unregister the event).\n     */\n    public addLogOutEventListener(callback: Function): number {\n        return this._logoutCallbacks.push(callback);\n    }\n\n    /**\n     * Remove a callback from the LogOut event.\n     *\n     * @param id The id given when event listener was added.\n     *\n     * @returns true when remove successfully, false otherwise.\n     */\n    public removeLogOutEventListener(id: number): boolean {\n        return delete this._logoutCallbacks[id - 1];\n    }\n\n    /**\n     * Listen for login messages from other windows.\n     * These messages contain the tokens from the AAP.\n     * If a token is received then the callbacks are triggered.\n     */\n    private _listenLoginMessage(renderer: Renderer2) {\n        renderer.listen('window', 'message', (event: MessageEvent) => {\n            if (!this.messageIsAcceptable(event)) {\n                return;\n            }\n            this._storageUpdater(event.data);\n            event.source.close();\n            this._updateCredentials();\n\n            // Triggers updating other windows\n            this._commKeyUpdater();\n        });\n    }\n\n    /** Listen to changes in the token from *other* windows.\n     *\n     * For inter-window communication messages are transmitted trough changes\n     * on a dummy storage key property: '_commKeyName'.\n     *\n     * Notice that changes in the '_commKeyName' produced by this class doesn't\n     * trigger this event.\n     */\n    private _listenChangesFromOtherWindows(renderer: Renderer2) {\n        renderer.listen('window', 'storage', (event: StorageEvent) => {\n            if (event.key === this._commKeyName) {\n                this._updateCredentials();\n            }\n        });\n    }\n\n    /**\n     * Check if the message is coming from the same domain we use to generate\n     * the SSO URL, otherwise it's iffy and shouldn't trust it.\n     */\n    private messageIsAcceptable(event: MessageEvent): boolean {\n        return event.origin === this._appURL;\n    }\n\n    private _updateCredentials() {\n        const isAuthenticated = this._loggedIn();\n\n        if (this._timeoutID) {\n            window.clearTimeout(this._timeoutID);\n        }\n\n        if (isAuthenticated) {\n            this._credentials.next({\n                realname: < string > this._getRealName(),\n                username: < string > this._getUserName(),\n                token: < string > this._getToken()\n            });\n\n            this._loginCallbacks.map(callback => callback && callback());\n\n            // Schedule future logout event base on token expiration\n            const expireDate = < Date > this._tokenService.getTokenExpirationDate();\n            // Coercing dates to numbers with the unary operator '+'\n            const delay = +expireDate - +new Date();\n            this._timeoutID = window.setTimeout(() => this.logOut(), delay);\n        } else {\n            this._storageRemover(); // Cleanup possible left behind token\n            this._credentials.next(null);\n            this._logoutCallbacks.map(callback => callback && callback());\n        }\n    }\n\n    /**\n     * Check if there's a user logging on and whether the token is still valid.\n     *\n     * @returns  Whether the user user is authenticated or not.\n     */\n    private _loggedIn(): boolean {\n        return this._tokenService.isTokenValid();\n    }\n\n    private _getToken(): string | null {\n        return this._tokenService.getToken();\n    }\n\n    private _getUserName(): string | null {\n        return this._tokenService.getClaim < string, null > ('email', null);\n    }\n\n    private _getRealName(): string | null {\n        return this._tokenService.getClaim < string, null > ('name', null);\n    }\n\n}\n"]}