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<!--
@license
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<link rel="import" href="firebase.html">
<link rel="import" href="../polymer/polymer.html">
<!--
**Note: This element is for the older Firebase 2 API**
For the latest official Firebase 3.0-compatible component from the Firebase team,
see the [polymerfire](https://github.com/firebase/polymerfire) component.
Element wrapper for the Firebase authentication API (https://www.firebase.com/docs/web/guide/user-auth.html).
@demo demo/index.html
-->
<script>
Polymer({
is: 'firebase-auth',
properties: {
/**
* Firebase location URL (must have simple login enabled via Forge interface).
*/
location: {
type: String,
reflectToAttribute: true,
observer: '_locationChanged'
},
/**
* Default login provider type. May be one of: `anonymous`, `custom`, `password`,
* `facebook`, `github`, `twitter`, `google`.
*/
provider: {
type: String,
reflectToAttribute: true,
value: 'anonymous'
},
/**
* When logged in, this property reflects the firebase user auth object.
*/
user: {
type: Object,
readOnly: true,
notify: true
},
/**
* When true, login will be attempted if login status check determines no user is
* logged in. Should generally only be used with provider types that do not present
* a login UI, such as 'anonymous'.
*/
autoLogin: {
type: Boolean,
value: false,
reflectToAttribute: true
},
/**
* When true, login status can be determined by checking `user` property.
*/
statusKnown: {
type: Boolean,
value: false,
notify: true,
readOnly: true,
reflectToAttribute: true
},
/**
* When true, authentication will try to redirect instead of using a
* popup if possible.
*/
redirect: {
type: Boolean,
value: false,
reflectToAttribute: true
},
/**
* Provider-specific parameters to pass to login. May be overridden at `login()`-time.
*/
params: {
type: Object
},
/**
* Provider-specific options to pass to login, for provider types that take a second
* object to pass firebase-specific options. May be overridden at `login()`-time.
*/
options: {
type: Object
},
/**
* A pointer to the Firebase instance being used by the firebase-auth element.
*/
ref: {
type: Object,
readOnly: true,
notify: true
},
_boundAuthHandler: {
value: function() {
return this._authHandler.bind(this);
}
},
_boundOnlineHandler: {
value: function() {
return this._onlineHandler.bind(this);
}
},
_queuedLogin: {
type: Object
}
},
attached: function() {
window.addEventListener('online', this._boundOnlineHandler);
},
detached: function() {
window.removeEventListener('online', this._boundOnlineHandler);
this.ref.offAuth(this._boundAuthHandler);
},
_locationChanged: function(location) {
// Note: we debounce here in case location changed as part of property
// initialization, so that we don't try to login before other properties
// are initialized.
this.debounce('locationChanged', function() {
if (this.ref) {
this.ref.offAuth(this._boundAuthHandler);
}
if (location) {
this._setRef(new Firebase(location));
this.ref.onAuth(this._boundAuthHandler);
} else {
this._setRef(null);
}
}, 1);
},
_loginHandler: function(error, user) {
if (error) {
// an error occurred while attempting login
this.fire('error', error);
}
},
_authHandler: function(user) {
if (user) {
// user authenticated with Firebase
this._setUser(user);
this._setStatusKnown(true);
this.fire('login', {user: user});
} else {
this._setUser(null);
if (this.statusKnown) {
this._setStatusKnown(false);
this.fire('logout');
}
if (this._queuedLogin) {
this.login(this._queuedLogin.params, this._queuedLogin.options);
this._queuedLogin = null;
} else if (!this.statusKnown && this.autoLogin) {
this.login();
}
this._setStatusKnown(true);
}
},
/**
* Performs a login attempt, using the `provider` specified via attribute/property,
* or optionally via `provider` argument to the `login` function. Optionally,
* provider-specific login parameters can be specified via attribute (JSON)/property,
* or via the `params` argument to the `login` function.
*
* If your `provider` is `custom` you must pass a Firebase Auth token as
* `params.token`. You can also optionally pass an auth token as `params.token` for
* providers `facebook`, `google`, `github` and `twitter` to login headlessly.
*
* If the login is successful, the `login` event is fired, with `e.detail.user`
* containing the authenticated user object from Firebase.
*
* If login fails, the `error` event is fired, with `e.detail` containing error
* information supplied from Firebase.
*
* If the browser supports `navigator.onLine` network status reporting and the
* network is currently offline, the login attempt will be queued until the network
* is restored.
*
* @method login
* @param {Object} params (optional)
* @param {Object} options (optional)
*/
login: function(params, options) {
if (!this.ref || navigator.onLine === false) {
this._queuedLogin = {params: params, options: options};
} else {
params = params || this.params || undefined;
options = options || this.options || undefined;
switch(this.provider) {
case 'password':
this.ref.authWithPassword(params, this._loginHandler.bind(this), options);
break;
case 'anonymous':
this.ref.authAnonymously(this._loginHandler.bind(this), params);
break;
case 'custom':
this.ref.authWithCustomToken(params.token, this._loginHandler.bind(this));
break;
case 'facebook':
case 'google':
case 'github':
case 'twitter':
if (params && params.token) {
this.ref.authWithOAuthToken(this.provider, params.token, this._loginHandler.bind(this), params);
} else if (this.redirect) {
this.ref.authWithOAuthRedirect(this.provider, this._loginHandler.bind(this), params);
} else {
this.ref.authWithOAuthPopup(this.provider, this._loginHandler.bind(this), params);
}
break;
default:
throw 'Unknown provider: ' + this.provider;
}
}
},
/**
* Performs a logout attempt.
*
* If the logout is successful, the `logout` event is fired.
*
* If logout fails, the `error` event is fired, with `e.detail` containing error
* information supplied from Firebase.
*
* If the browswer supports `navigator.onLine` network status reporting and the
* network is currently offline, the logout attempt will be queued until the network
* is restored.
*
* @method logout
*/
logout: function() {
if (navigator.onLine === false) {
this.queuedLogout = true;
} else {
this.ref.unauth();
}
},
_onlineHandler: function() {
if (this.queuedLogout) {
this.queuedLogout = false;
this.logout();
} else if (this.queuedLogin) {
this.login(this.queuedLogin.params, this.queuedLogin.options);
this.queuedLogin = null;
}
},
/**
* Creates a "password provider"-based user account.
*
* If the operation is successful, the `user-created` event is fired.
*
* If the operation fails, the `error` event is fired, with `e.detail`
* containing error information supplied from Firebase.
*
* @method createUser
* @param {string} email
* @param {string} password
*/
createUser: function(email, password) {
this.ref.createUser({email: email, password: password}, function(error, user) {
if (!error) {
this.fire('user-created', {user: user});
} else {
this.fire('error', error);
}
}.bind(this));
},
/**
* Changes the password of a "password provider"-based user account.
*
* If the operation is successful, the `password-changed` event is fired.
*
* If the operation fails, the `error` event is fired, with `e.detail`
* containing error information supplied from Firebase.
*
* @method changePassword
* @param {string} email
* @param {string} oldPassword
* @param {string} newPassword
*/
changePassword: function(email, oldPassword, newPassword) {
this.ref.changePassword({
email: email,
oldPassword: oldPassword,
newPassword: newPassword
}, function(error) {
if (!error) {
this.fire('password-changed');
} else {
this.fire('error', error);
}
}.bind(this));
},
/**
* Sends a password reset email for a "password provider"-based user account.
*
* If the operation is successful, the `password-reset` event is fired.
*
* If the operation fails, the `error` event is fired, with `e.detail`
* containing error information supplied from Firebase.
*
* @method sendPasswordResetEmail
* @param {string} email
*/
sendPasswordResetEmail: function(email) {
this.ref.resetPassword({email: email}, function(error) {
if (!error) {
this.fire('password-reset');
} else {
this.fire('error', error);
}
}.bind(this));
},
/**
* Changes the email of a "password provider"-based user account.
*
* If the operation is successful, the `email-changed` event is fired.
*
* If the operation fails, the `error` event is fired, with `e.detail`
* containing error information supplied from Firebase.
*
* @method changeEmail
* @param {string} oldEmail
* @param {string} newEmail
* @param {string} Password
*/
changeEmail: function(oldEmail, newEmail, password) {
this.ref.changeEmail({
oldEmail: oldEmail,
newEmail: newEmail,
password: password
}, function(error) {
if (!error) {
this.fire('email-changed');
} else {
this.fire('error', error);
}
}.bind(this));
},
/**
* Removes a "password provider"-based user account.
*
* If the operation is successful, the `user-removed` event is fired.
*
* If the operation fails, the `error` event is fired, with `e.detail`
* containing error information supplied from Firebase.
*
* @method removeUser
* @param {string} email
* @param {string} password
*/
removeUser: function(email, password) {
this.ref.removeUser({email: email, password: password}, function(error, success) {
if (!error) {
this.fire('user-removed');
} else {
this.fire('error', error);
}
}.bind(this));
}
});
</script>