Add host status plugin

- Create WebSocket and get host state changes from server
- Changed webpack devServer to https to allow for
  secure WebSocket creation (wss)
- Updates to AppHeader to visually indicate changes
  in host state
- Cleaned up api.js file
- Check if user is logged in when creating WebSocket
- Adds check if user is already authenticated so WebSocket
  is created when browser refreshed.
- Add appliation header styles
- Add sass loader config changes to allow sass variables to
  be used in single file components

URL must use https protocol when running locally or the page
will not load.

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Signed-off-by: Derick Montague <derick.montague@ibm.com>
Change-Id: I35e89bdc09e1aa35a6215ef952409a8ed16dd9e1

4 files changed, 85 insertions, 8 deletions

diff --git a/src/store/api.js b/src/store/api.js
index da6f3982..463e0d86 100644
--- a/src/store/api.js
+++ b/src/store/api.js
@@ -4,10 +4,6 @@ const api = Axios.create({
   withCredentials: true
 });
 
-// TODO: Permanent authentication solution
-// Using defaults to set auth for sending
-// auth object in header
-
 export default {
   get(path) {
     return api.get(path);
@@ -26,6 +22,5 @@ export default {
   },
   all(promises) {
     return Axios.all(promises);
-  },
-  defaults: api.defaults
+  }
 };
diff --git a/src/store/index.js b/src/store/index.js
index 4ef1c9d0..889e52b4 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -5,6 +5,8 @@ import GlobalStore from './modules/GlobalStore';
 import AuthenticationStore from './modules/Authentication/AuthenticanStore';
 import LocalUserManagementStore from './modules/AccessControl/LocalUserMangementStore';
 
+import WebSocketPlugin from './plugins/WebSocketPlugin';
+
 Vue.use(Vuex);
 
 export default new Vuex.Store({
@@ -15,5 +17,6 @@ export default new Vuex.Store({
     global: GlobalStore,
     authentication: AuthenticationStore,
     localUsers: LocalUserManagementStore
-  }
+  },
+  plugins: [WebSocketPlugin]
 });
diff --git a/src/store/modules/GlobalStore.js b/src/store/modules/GlobalStore.js
index 8cf2e8eb..80d9c1a3 100644
--- a/src/store/modules/GlobalStore.js
+++ b/src/store/modules/GlobalStore.js
@@ -1,10 +1,31 @@
 import api from '../api';
 
+const HOST_STATE = {
+  on: 'xyz.openbmc_project.State.Host.HostState.Running',
+  off: 'xyz.openbmc_project.State.Host.HostState.Off',
+  error: 'xyz.openbmc_project.State.Host.HostState.Quiesced',
+  diagnosticMode: 'xyz.openbmc_project.State.Host.HostState.DiagnosticMode'
+};
+
+const hostStateMapper = hostState => {
+  switch (hostState) {
+    case HOST_STATE.on:
+      return 'on';
+    case HOST_STATE.off:
+      return 'off';
+    case HOST_STATE.error:
+      return 'error';
+    // TODO: Add mapping for DiagnosticMode
+    default:
+      return 'unreachable';
+  }
+};
+
 const GlobalStore = {
   namespaced: true,
   state: {
     hostName: '--',
-    hostStatus: null
+    hostStatus: 'unreachable'
   },
   getters: {
     hostName(state) {
@@ -17,6 +38,9 @@ const GlobalStore = {
   mutations: {
     setHostName(state, hostName) {
       state.hostName = hostName;
+    },
+    setHostStatus(state, hostState) {
+      state.hostStatus = hostStateMapper(hostState);
     }
   },
   actions: {
@@ -28,6 +52,15 @@ const GlobalStore = {
           commit('setHostName', hostName);
         })
         .catch(error => console.log(error));
+    },
+    getHostStatus({ commit }) {
+      api
+        .get('/xyz/openbmc_project/state/host0/attr/CurrentHostState')
+        .then(response => {
+          const hostState = response.data.data;
+          commit('setHostStatus', hostState);
+        })
+        .catch(error => console.log(error));
     }
   }
 };
diff --git a/src/store/plugins/WebSocketPlugin.js b/src/store/plugins/WebSocketPlugin.js
new file mode 100644
index 00000000..3e2139dd
--- /dev/null
+++ b/src/store/plugins/WebSocketPlugin.js
@@ -0,0 +1,46 @@
+/**
+ * WebSocketPlugin will allow us to get new data from the server
+ * without having to poll for changes on the frontend.
+ *
+ * This plugin is subscribed to host state property changes, which
+ * is indicated in the app header Power status.
+ *
+ * https://github.com/openbmc/docs/blob/b41aff0fabe137cdb0cfff584b5fe4a41c0c8e77/rest-api.md#event-subscription-protocol
+ */
+const WebSocketPlugin = store => {
+  let ws;
+  const data = {
+    paths: ['/xyz/openbmc_project/state/host0'],
+    interfaces: ['xyz.openbmc_project.State.Host']
+  };
+
+  const initWebSocket = () => {
+    ws = new WebSocket(`wss://${window.location.host}/subscribe`);
+    ws.onopen = () => {
+      ws.send(JSON.stringify(data));
+    };
+    ws.onerror = event => {
+      console.error(event);
+    };
+    ws.onmessage = event => {
+      const {
+        properties: { CurrentHostState, RequestedHostTransition } = {}
+      } = JSON.parse(event.data);
+      const hostState = CurrentHostState || RequestedHostTransition;
+      store.commit('global/setHostStatus', hostState);
+    };
+  };
+
+  store.subscribe(({ type }) => {
+    if (type === 'authentication/authSuccess') {
+      initWebSocket();
+    }
+    if (type === 'authentication/logout') {
+      if (ws) ws.close();
+    }
+  });
+
+  if (store.getters['authentication/isLoggedIn']) initWebSocket();
+};
+
+export default WebSocketPlugin;