Fix login form with translations (#612)

* Revert "Fix not showing login form (#564)"

This reverts commit d2faeaffe7.

* Don't lose translation resources on logout

* Fix lint

src/home-assistant.html

@@ -72,10 +72,6 @@ class HomeAssistant extends Polymer.Element {
         type: Object,
         value: null,
       },
-      language: {
-        type: Object,
-        value: null,
-      },
       showMain: {
         type: Boolean,
         computed: 'computeShowMain(hass)',
@@ -96,12 +92,13 @@ class HomeAssistant extends Polymer.Element {
 
   computeShowLoading(connectionPromise, hass) {
     // Show loading when connecting or when connected but not all pieces loaded yet
-    return (connectionPromise != null || (hass && (!hass.states || !hass.config)));
+    return (connectionPromise != null
+      || (hass && hass.connection && (!hass.states || !hass.config)));
   }
 
   loadResources() {
     window.getTranslation().then((result) => {
-      this._updateLanguage({
+      this._updateHass({
         language: result.language,
         resources: result.resources,
       });
@@ -114,7 +111,17 @@ class HomeAssistant extends Polymer.Element {
       this.unsubConnection = null;
     }
     if (!conn) {
-      this.hass = null;
+      this._updateHass({
+        connection: null,
+        connected: false,
+        states: null,
+        config: null,
+        themes: null,
+        dockedSidebar: false,
+        moreInfoEntityId: null,
+        callService: null,
+        callApi: null,
+      });
       return;
     }
     var notifications = this.$.notifications;
@@ -158,7 +165,7 @@ class HomeAssistant extends Polymer.Element {
         var auth = conn.options.authToken ? conn.options : {};
         return window.hassCallApi(host, auth, method, path, parameters);
       },
-    }, this.language, this.$.storage.getStoredState());
+    }, this.$.storage.getStoredState());
 
     var reconnected = () => {
       this._updateHass({ connected: true });
@@ -256,7 +263,7 @@ class HomeAssistant extends Polymer.Element {
   }
 
   selectLanguage(event) {
-    this._updateLanguage({ selectedLanguage: event.detail.language });
+    this._updateHass({ selectedLanguage: event.detail.language });
     this.$.storage.storeState();
     this.loadResources();
   }
@@ -264,11 +271,6 @@ class HomeAssistant extends Polymer.Element {
   _updateHass(obj) {
     this.hass = Object.assign({}, this.hass, obj);
   }
-
-  _updateLanguage(obj) {
-    this.language = Object.assign({}, this.language, obj);
-    if (this.hass) this._updateHass(obj);
-  }
 }
 
 customElements.define(HomeAssistant.is, HomeAssistant);

src/layouts/partial-cards.html

@@ -221,7 +221,7 @@
 
     disconnectedCallback() {
       super.disconnectedCallback();
-      this.mqls.forEach(function (mql) {
+      this.mqls.forEach((mql) => {
         mql.removeListener(this.handleWindowChange);
       });
     }

src/managers/notification-manager.html

@@ -19,7 +19,7 @@
       id='connToast'
       duration='0'
       text='Connection lost. Reconnecting…'
-      opened='[[!isStreaming]]'
+      opened='[[connectionLost]]'
     ></paper-toast>
   </template>
 </dom-module>
@@ -32,11 +32,17 @@ class NotificationManager extends Polymer.Element {
     return {
       hass: {
         type: Object,
+        observer: 'hassChanged',
       },
 
-      isStreaming: {
+      wasConnected: {
         type: Boolean,
-        computed: 'computeIsStreaming(hass)',
+        value: false,
+      },
+
+      connectionLost: {
+        type: Boolean,
+        computed: 'computeConnectionLost(wasConnected, hass)',
       },
 
       _cancelOnOutsideClick: {
@@ -56,8 +62,19 @@ class NotificationManager extends Polymer.Element {
     };
   }
 
-  computeIsStreaming(hass) {
-    return !hass || hass.connected;
+  hassChanged(hass) {
+    if (hass && hass.connected) {
+      // Once the connetion is established, set wasConnected to true
+      this.wasConnected = true;
+    }
+    if (!hass || !hass.connection) {
+      // If the users logs out, reset wasConnected
+      this.wasConnected = false;
+    }
+  }
+
+  computeConnectionLost(wasConnected, hass) {
+    return wasConnected && hass && !hass.connected;
   }
 
   constructor() {