add simple metrics ui

packages/unleash-frontend-next/.eslintrc

@@ -2,5 +2,8 @@
     "extends": [
         "finn",
         "finn/node"
-    ]
+    ],
+    "rules": {
+        "no-shadow": 0
+    }
 }

packages/unleash-frontend-next/src/component/metrics/metrics-component.js

@@ -0,0 +1,31 @@
+import React, { Component } from 'react';
+import { List, ListItem, ListSubHeader, ListDivider } from 'react-toolbox/lib/list';
+import Chip from 'react-toolbox/lib/chip';
+
+class Metrics extends Component {
+
+    componentDidMount () {
+        this.props.fetchMetrics();
+    }
+
+    render () {
+        const { globalCount, apps, clientList } = this.props;
+
+        return (
+            <List>
+                <ListSubHeader caption={<span>Total of {globalCount} toggles checked from {apps.length} apps ({apps.join(', ')})</span>} />
+                <ListDivider />
+                {clientList.map(({ name, count, ping, appName }, i) =>
+                    <ListItem
+                        leftActions={[<Chip>{count}</Chip>]}
+                        key={name + i}
+                        caption={appName}
+                        legend={`${name} pinged ${ping}`} />
+                )}
+            </List>
+        );
+    }
+}
+
+
+export default Metrics;

packages/unleash-frontend-next/src/component/metrics/metrics-container.js

@@ -0,0 +1,39 @@
+import { connect } from 'react-redux';
+import Metrics from './metrics-component';
+import { fetchMetrics } from '../../store/metrics-actions';
+
+const mapStateToProps = (state) => {
+    const globalCount = state.metrics.get('globalCount');
+    const apps = state.metrics.get('apps').toArray();
+    const clients = state.metrics.get('clients').toJS();
+
+    const clientList = Object
+        .keys(clients)
+        .map((k) => {
+            const client = clients[k];
+            return {
+                name: k,
+                appName: client.appName,
+                count: client.count,
+                ping: new Date(client.ping),
+            };
+        })
+        .sort((a, b) => (a.ping > b.ping ? -1 : 1));
+
+
+    /*
+        Possible stuff to ask/answer:
+        * toggles in use but not in unleash-server
+            * nr of toggles using fallbackValue
+        * strategies implemented but not used
+    */
+    return {
+        globalCount,
+        apps,
+        clientList,
+    };
+};
+
+const MetricsContainer = connect(mapStateToProps, { fetchMetrics })(Metrics);
+
+export default MetricsContainer;

packages/unleash-frontend-next/src/component/nav.jsx

@@ -14,10 +14,11 @@ export default class UnleashNav extends Component {
 
         return (
                 <List selectable ripple className={style.navigation}>
-                    {createListItem('/features', 'Feature Toggles')}
+                    {createListItem('/features', 'Feature toggles')}
                     {createListItem('/strategies', 'Strategies')}
-                    {createListItem('/history', 'Event History')}
+                    {createListItem('/history', 'Event history')}
-                    {createListItem('/archive', 'Archived Toggles')}
+                    {createListItem('/archive', 'Archived toggles')}
+                    {createListItem('/metrics', 'Client metrics')}
 
                     <ListDivider />
 

packages/unleash-frontend-next/src/data/metrics-api.js

@@ -0,0 +1,20 @@
+const URI = '/metrics';
+
+function throwIfNotSuccess (response) {
+    if (!response.ok) {
+        let error = new Error('API call failed');
+        error.status = response.status;
+        throw error;
+    }
+    return response;
+}
+
+function fetchAll () {
+    return fetch(URI)
+        .then(throwIfNotSuccess)
+        .then(response => response.json());
+}
+
+module.exports = {
+    fetchAll,
+};

packages/unleash-frontend-next/src/index.jsx

@@ -15,6 +15,7 @@ import Strategies from './page/strategies';
 import CreateStrategies from './page/strategies/create';
 import HistoryPage from './page/history';
 import Archive from './page/archive';
+import Metrics from './page/metrics';
 
 const unleashStore = createStore(
     store,
@@ -35,6 +36,7 @@ ReactDOM.render(
                 <Route path="/strategies/create" component={CreateStrategies} />
                 <Route path="/history" component={HistoryPage} />
                 <Route path="/archive" component={Archive} />
+                <Route path="/metrics" component={Metrics} />
             </Route>
         </Router>
     </Provider>, document.getElementById('app'));

packages/unleash-frontend-next/src/page/metrics/index.js

@@ -0,0 +1,6 @@
+import React from 'react';
+import Metrics from '../../component/metrics/metrics-container';
+
+const render = () => <Metrics />;
+
+export default render;

packages/unleash-frontend-next/src/store/index.js

@@ -5,6 +5,7 @@ import input from './input-store';
 import history from './history-store'; // eslint-disable-line
 import archive from './archive-store';
 import error from './error-store';
+import metrics from './metrics-store';
 
 const unleashStore = combineReducers({
     features,
@@ -13,6 +14,7 @@ const unleashStore = combineReducers({
     history,
     archive,
     error,
+    metrics,
 });
 
 export default unleashStore;

packages/unleash-frontend-next/src/store/metrics-actions.js

@@ -0,0 +1,20 @@
+import api from '../data/metrics-api';
+
+export const RECEIVE_METRICS        = 'RECEIVE_METRICS';
+export const ERROR_RECEIVE_METRICS  = 'ERROR_RECEIVE_METRICS';
+
+const receiveMetrics = (json) => ({
+    type: RECEIVE_METRICS,
+    value: json,
+});
+
+const errorReceiveMetrics = (statusCode) => ({
+    type: ERROR_RECEIVE_METRICS,
+    statusCode,
+});
+
+export function fetchMetrics () {
+    return dispatch => api.fetchAll()
+        .then(json => dispatch(receiveMetrics(json)))
+        .catch(error => dispatch(errorReceiveMetrics(error)));
+}

packages/unleash-frontend-next/src/store/metrics-store.js

@@ -0,0 +1,21 @@
+import { fromJS } from 'immutable';
+import { RECEIVE_METRICS } from './metrics-actions';
+
+function getInitState () {
+    return fromJS({
+        totalCount: 0,
+        apps: [],
+        clients: {},
+    });
+}
+
+const historyStore = (state = getInitState(), action) => {
+    switch (action.type) {
+        case RECEIVE_METRICS:
+            return fromJS(action.value);
+        default:
+            return state;
+    }
+};
+
+export default historyStore;

packages/unleash-frontend-next/webpack.config.js

@@ -73,6 +73,10 @@ module.exports = {
                 target: 'http://localhost:4242',
                 secure: false,
             },
+            '/metrics': {
+                target: 'http://localhost:4242',
+                secure: false,
+            },
         },
     },
 };