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firebase-login.html
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firebase-login.html
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<!--
@license
Copyright (c) 2014 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-import.html">
<link rel="import" href="../polymer/polymer.html">
<polymer-element name="firebase-login" attributes="location provider user autoLogin statusKnown params">
<!--
Element wrapper for the Firebase authentication API (https://www.firebase.com/docs/web/guide/user-auth.html).
@class firebase-login
@blurb Element wrapper for the Firebase Simple Login API (https://www.firebase.com/docs/web/guide/user-auth.html).
@status alpha
@snap snap.png
-->
<script>
Polymer('firebase-login', {
/**
* Fired when user is logged in
*
* @event login
*/
/**
* Fired when user is logged out
*
* @event logout
*/
/**
* Fired when an error occurred logging in
*
* @event error
*/
/**
* Fired when user is created (password provider type)
*
* @event user-created
*/
/**
* Fired when user changes their password (password provider type)
*
* @event password-changed
*/
/**
* Fired when password reset email is sent (password provider type)
*
* @event password-reset
*/
/**
* Fired when user is removed (password provider type)
*
* @event user-removed
*/
/**
* Firebase location URL (must have simple login enabled via Forge interface).
* @attribute location
* @type String
* @default null
*/
location: null,
/**
* Default login provider type. May be one of: `anonymous`, `custom`, `password`
* `facebook`, `github`, `twitter`, `google`.
* @attribute provider
* @type String
* @default 'anonymous'
*/
provider: 'anonymous',
/**
* When logged in, this property reflects the firebase user auth object.
* @attribute user
* @type Object
* @default null
*/
user: null,
/**
* 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'.
* @attribute autoLogin
* @type Boolean
* @default false
*/
autoLogin: false,
/**
* When true, login status can be determined by checking `user` property.
* @attribute statusKnown
* @type Boolean
* @default false
*/
statusKnown: false,
/**
* Provider-specific parameters to pass to login. May be overridden at `login()`-time.
* @attribute params
* @type Object
* @default null
*/
params: null,
/**
* 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.
* @attribute options
* @type Object
* @default null
*/
options: null,
/**
* For OAuth provider types (`facebook`, `twitter`, `github`, `google`), determines
* whether the login UI is presented via redirect, as opposed to popup (default).
* @attribute redirect
* @type Boolean
* @default false
*/
redirect: false,
ready: function() {
this._boundAuthHandler = this._authHandler.bind(this);
this._boundOnlineHandler = this._onlineHandler.bind(this);
},
attached: function() {
window.addEventListener('online', this._boundOnlineHandler);
if (this.ref) {
this.locationChanged();
}
},
detached: function() {
window.removeEventListener(this._boundOnlineHandler);
this.ref.offAuth(this._boundAuthHandler);
},
locationChanged: function() {
if (this.location != this._location) {
if (this._location) {
this.ref.offAuth(this._boundAuthHandler);
}
}
this._location = this.location;
if (this._location) {
this.ref = new Firebase(this.location);
this.ref.onAuth(this._boundAuthHandler);
} else {
this.ref = null;
}
},
_loginHandler: function(error, user) {
if (error) {
// an error occurred while attempting login
this.fire('error', error);
} else {
this._authHandler(user);
}
},
_authHandler: function(user) {
if (user) {
// user authenticated with Firebase
this.user = user;
this.statusKnown = true;
this.fire('login', {user: user});
} else {
this.user = null;
if (this.statusKnown) {
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.statusKnown = 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 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 browswer 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 {string} params (optional)
* @param {string} options (optional)
*/
login: function(params, options) {
if (navigator.onLine === false) {
this.queuedLogin = {params: params, options: options};
} else {
params = params || (this.params && JSON.parse(this.params)) || undefined;
options = options || (this.options && JSON.parse(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 (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 login is successful, the `logout` event is fired.
*
* If login 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) {
if (!error) {
this.fire('user-created');
} else {
this.fire('error', error);
}
}.bind(this));
},
/**
* Changes the password of 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 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 `user-created` 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));
},
/**
* Removes 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 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>
</polymer-element>