firebase-app.html

<!--
@license
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file or at
https://github.com/firebase/polymerfire/blob/master/LICENSE
-->

<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="firebase-app-script.html">
<dom-module id="firebase-app">
  <script>
    (function() {
      'use strict';

      /**
       * The firebase-app element is used for initializing and configuring your
       * connection to firebase. It is permanently initialized once attached and
       * should not be dynamically bound.
       */
      Polymer({
        is: 'firebase-app',

        properties: {
          /**
           * The name of your app. Optional.
           *
           * You can use this with the `appName` property of other Polymerfire elements
           * in order to use multiple firebase configurations on a page at once.
           * In that case the name is used as a key to lookup the configuration.
           */
          name: {
            type: String,
            value: ''
          },

          /**
           * Your API key.
           *
           * Get this from the Auth > Web Setup panel of the new
           * Firebase Console at https://console.firebase.google.com
           *
           * It looks like this: 'AIzaSyDTP-eiQezleFsV2WddFBAhF_WEzx_8v_g'
           */
          apiKey: {
            type: String
          },

          /**
           * The domain name to authenticate with.
           *
           * The same as your Firebase Hosting subdomain or custom domain.
           * Available on the Firebase Console.
           *
           * For example: 'polymerfire-test.firebaseapp.com'
           */
          authDomain: {
            type: String
          },

          /**
           * The URL of your Firebase Realtime Database. You can find this
           * URL in the Database panel of the Firebase Console.
           * Available on the Firebase Console.
           *
           * For example: 'https://polymerfire-test.firebaseio.com/'
           */
          databaseUrl: {
            type: String
          },

          /**
           * The Firebase Storage bucket for your project. You can find this
           * in the Firebase Console under "Web Setup".
           *
           * For example: `polymerfire-test.appspot.com`
           */
          storageBucket: {
            type: String,
            value: null
          },

          /**
           * The Firebase Cloud Messaging Sender ID for your project. You can find
           * this in the Firebase Console under "Web Setup".
           */
          messagingSenderId: {
            type: String,
            value: null
          },

          /**
           * The Firebase app object constructed from the other fields of
           * this element.
           * @type {firebase.app.App}
           */
          app: {
            type: Object,
            notify: true,
            computed: '__computeApp(name, apiKey, authDomain, databaseUrl, storageBucket, messagingSenderId)'
          }
        },

        __computeApp: function(name, apiKey, authDomain, databaseUrl, storageBucket, messagingSenderId) {
          if (apiKey && authDomain && databaseUrl) {
            var init = [{
              apiKey: apiKey,
              authDomain: authDomain,
              databaseURL: databaseUrl,
              storageBucket: storageBucket,
              messagingSenderId: messagingSenderId
            }];

            if (name) {
              init.push(name);
            }

            firebase.initializeApp.apply(firebase, init);
          } else {
            return null;
          }

          return firebase.app(name);
        }
      });
    })();
  </script>
</dom-module>