Merge branch 'master' of gitlab.com:elixire/elstat

priv/frontend/.prettierrc

@@ -0,0 +1,7 @@
+{
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "arrowParens": "always",
+  "proseWrap": "always"
+}

priv/frontend/src/components/App.js

@@ -5,11 +5,11 @@ import { Router } from '@reach/router'
 import Dashboard from './Dashboard'
 import Incidents from './Incidents'
 
-export default function App () {
+export default function App() {
   return (
     <Router>
-      <Dashboard path="/"/>
-      <Incidents path="/incidents/"/>
+      <Dashboard path="/" />
+      <Incidents path="/incidents/" />
     </Router>
   )
 }

priv/frontend/src/components/Dashboard.js

@@ -19,7 +19,7 @@ export default class Dashboard extends Component {
     incident: null,
   }
 
-  async componentDidMount () {
+  async componentDidMount() {
     try {
       await this.loadMetrics()
       await this.loadIncident()
@@ -53,7 +53,7 @@ export default class Dashboard extends Component {
     })
   }
 
-  handleStatus (name, [, status]) {
+  handleStatus(name, [, status]) {
     const { status: statuses } = this.state.metrics
     log('updating status on:', name)
 
@@ -75,7 +75,7 @@ export default class Dashboard extends Component {
     })
   }
 
-  handleLatency (name, data) {
+  handleLatency(name, data) {
     const { metrics } = this.state
 
     log('adding latency entry:', data)
@@ -97,50 +97,56 @@ export default class Dashboard extends Component {
     })
   }
 
-  async loadMetrics () {
+  async loadMetrics() {
     log('loading metrics')
 
     const resp = await strictFetch(`${DOMAIN}/api/status`)
     this.setState({ metrics: await resp.json() })
   }
 
-  async loadIncident () {
+  async loadIncident() {
     log('loading current incident')
 
     const resp = await strictFetch(`${DOMAIN}/api/incidents/current`)
     this.setState({ incident: await resp.json() })
   }
 
-  renderNotice (services) {
+  renderNotice(services) {
     const down = services.filter(([, { status }]) => !status)
 
     // DegradedNotice should only be shown when there is no ongoing incident,
     // and any services are reported as down.
     if (!this.state.incident && down.length > 0) {
-      return <DegradedNotice services={objectFromEntries(down)}/>
+      return <DegradedNotice services={objectFromEntries(down)} />
     }
 
-    return <Status incident={this.state.incident}/>
+    return <Status incident={this.state.incident} />
   }
 
-  renderServices (services) {
-    const { graph: graphs } = this.state.metrics
+  renderServices(services) {
+    const { graph: graphs, uptime: uptimes } = this.state.metrics
     return services.map(([name, info]) => (
-      <Service name={name} key={name} graph={graphs[name]} {...info}/>
+      <Service
+        name={name}
+        key={name}
+        graph={graphs[name]}
+        uptime={parseFloat(uptimes[name])}
+        {...info}
+      />
     ))
   }
 
-  renderPlaceholders () {
+  renderPlaceholders() {
     return (
       <React.Fragment>
-        <ServicePlaceholder/>
-        <ServicePlaceholder/>
-        <ServicePlaceholder/>
+        <ServicePlaceholder />
+        <ServicePlaceholder />
+        <ServicePlaceholder />
       </React.Fragment>
     )
   }
 
-  renderDashboardContent () {
+  renderDashboardContent() {
     if (this.state.error) {
       return <div className="error">{this.state.error}</div>
     }
@@ -162,7 +168,7 @@ export default class Dashboard extends Component {
     )
   }
 
-  render () {
+  render() {
     return (
       <Page>
         <h1>elstatus</h1>

priv/frontend/src/components/DegradedNotice.js

@@ -3,7 +3,7 @@ import PropTypes from 'prop-types'
 
 import './DegradedNotice.css'
 
-export default function DegradedNotice ({ services }) {
+export default function DegradedNotice({ services }) {
   const keys = Object.keys(services)
   const serviceNames = keys.join(', ')
 
@@ -12,7 +12,10 @@ export default function DegradedNotice ({ services }) {
 
   return (
     <div className="degraded-notice">
-      <header>{keys.length} service{plural} {indicative} unreachable</header>
+      <header>
+        {keys.length} service
+        {plural} {indicative} unreachable
+      </header>
       <p>
         elstat is having trouble contacting <strong>{serviceNames}</strong>.
       </p>

priv/frontend/src/components/Graph.js

@@ -24,11 +24,11 @@ export default class Graph extends Component {
     screenWidth: window.innerWidth,
   }
 
-  componentDidMount () {
+  componentDidMount() {
     window.addEventListener('resize', this.handleScreenChange)
   }
 
-  componentWillUnmount () {
+  componentWillUnmount() {
     window.removeEventListener('resize', this.handleScreenChange)
   }
 
@@ -38,7 +38,7 @@ export default class Graph extends Component {
     })
   }
 
-  processData () {
+  processData() {
     const { data } = this.props
 
     const objects = data.map(([timestamp, latency]) => ({
@@ -50,27 +50,23 @@ export default class Graph extends Component {
     return objects.sort(({ timestamp: a }, { timestamp: b }) => a - b)
   }
 
-  isSmallScreen () {
+  isSmallScreen() {
     return this.state.screenWidth < 500
   }
 
-  render () {
-    const yAxis = this.isSmallScreen()
-      ? null
-      : (
-        <YAxis
-          dataKey="latency"
-          tickLine={false}
-          tickFormatter={(tick) => `${tick}ms`}
-        />
-      )
+  render() {
+    const yAxis = this.isSmallScreen() ? null : (
+      <YAxis
+        dataKey="latency"
+        tickLine={false}
+        tickFormatter={(tick) => `${tick}ms`}
+      />
+    )
 
     return (
       <div className="graph-container">
         <ResponsiveContainer width="100%" height={175}>
-          <AreaChart
-            data={this.processData()}
-          >
+          <AreaChart data={this.processData()}>
             <XAxis
               dataKey="timestamp"
               tickFormatter={(tick) => ms(Date.now() - tick)}
@@ -78,7 +74,7 @@ export default class Graph extends Component {
             />
             {yAxis}
 
-            <CartesianGrid strokeDasharray="1 1"/>
+            <CartesianGrid strokeDasharray="1 1" />
             <Tooltip
               isAnimationActive={false}
               formatter={(value) => `${value}ms`}
@@ -86,11 +82,7 @@ export default class Graph extends Component {
               separator=": "
               labelFormatter={() => null}
             />
-            <ReferenceLine
-              y={1000}
-              label="1s"
-              stroke="pink"
-            />
+            <ReferenceLine y={1000} label="1s" stroke="pink" />
             <Area
               type="monotone"
               dataKey="latency"

priv/frontend/src/components/Incident.js

@@ -12,36 +12,39 @@ const OUTAGE_TYPES = {
   degraded_service: 'Degraded Service',
 }
 
-export default function Incident ({ incident }) {
-  const { content, end_date: end, start_date: start, title, type, stages } = incident
+export default function Incident({ incident }) {
+  const {
+    content,
+    end_date: end,
+    start_date: start,
+    title,
+    type,
+    stages,
+  } = incident
 
   const startDate = new Date(start * 1000)
   const endDate = end ? new Date(end * 1000) : null
-  const tooltip = `Started ${startDate.toLocaleString()}` +
+  const tooltip =
+    `Started ${startDate.toLocaleString()}` +
     (endDate ? `, ended ${endDate.toLocaleString()}` : '')
   const ago = ms(Date.now() - start * 1000)
   const agoEnd = end ? ms(Date.now() - end * 1000) : null
 
-  const stageNodes = stages.map(
-    (stage) => <Stage key={stage.title} stage={stage}/>
-  ).reverse() // show newest first
+  const stageNodes = stages
+    .map((stage) => <Stage key={stage.title} stage={stage} />)
+    .reverse() // show newest first
 
   return (
     <div className="incident">
-      <h2>{OUTAGE_TYPES[type] || type}: {title}</h2>
+      <h2>
+        {OUTAGE_TYPES[type] || type}: {title}
+      </h2>
       <p>{content}</p>
       <footer title={tooltip}>
         Started {ago} ago
         {end ? `, ended ${agoEnd} ago` : null}
       </footer>
-      {stageNodes.length
-        ? (
-          <div className="stages">
-            {stageNodes}
-          </div>
-        )
-        : null
-      }
+      {stageNodes.length ? <div className="stages">{stageNodes}</div> : null}
     </div>
   )
 }

priv/frontend/src/components/Incidents.js

@@ -11,26 +11,26 @@ export default class Incidents extends React.Component {
     page: 0,
   }
 
-  componentDidMount () {
+  componentDidMount() {
     this.fetchIncidents()
   }
 
-  async fetchIncidents () {
+  async fetchIncidents() {
     const resp = await strictFetch(`${DOMAIN}/api/incidents/${this.state.page}`)
     this.setState({ incidents: await resp.json() })
   }
 
-  renderIncidents () {
+  renderIncidents() {
     if (!this.state.incidents) {
       return null
     }
 
-    return this.state.incidents.map(
-      (incident) => <Incident key={incident.id} incident={incident}/>
-    )
+    return this.state.incidents.map((incident) => (
+      <Incident key={incident.id} incident={incident} />
+    ))
   }
 
-  render () {
+  render() {
     return (
       <Page>
         <h1>Incidents</h1>

priv/frontend/src/components/Page.js

@@ -3,12 +3,8 @@ import PropTypes from 'prop-types'
 
 import './Page.css'
 
-export default function Page ({ children }) {
-  return (
-    <div className="page">
-      {children}
-    </div>
-  )
+export default function Page({ children }) {
+  return <div className="page">{children}</div>
 }
 
 Page.propTypes = {

priv/frontend/src/components/Service.css

@@ -11,13 +11,13 @@
   margin: 0;
 }
 
-.service .latency {
+.service .information {
   margin-left: 0.5em;
   color: hsl(0, 0%, 45%);
 }
 
 @media (max-width: 500px) {
-  .service .latency {
+  .service .information {
     font-size: 1rem;
   }
 }
@@ -32,13 +32,13 @@
 }
 
 .service.service-alive .emoji {
-  color: #2ECC40;
+  color: #2ecc40;
 }
 
 .service.service-slow .emoji {
-  color: #FF851B;
+  color: #ff851b;
 }
 
 .service.service-dead .emoji {
-  color: #FF4136;
+  color: #ff4136;
 }

priv/frontend/src/components/Service.js

@@ -7,10 +7,9 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 import './Service.css'
 import Graph from './Graph.js'
 import config from '../config.json'
+import { truncateToTwoPlaces } from '../util'
 
-const {
-  slow_threshold: SLOW_THRESHOLD = 1500,
-} = config
+const { slow_threshold: SLOW_THRESHOLD = 1500 } = config
 
 const icons = {
   alive: 'check-circle',
@@ -24,7 +23,7 @@ const titles = {
   dead: 'This service is unresponsive.',
 }
 
-export function getServiceState (status, latency, threshold = SLOW_THRESHOLD) {
+export function getServiceState(status, latency, threshold = SLOW_THRESHOLD) {
   if (status && latency > threshold) {
     return 'slow'
   }
@@ -32,35 +31,41 @@ export function getServiceState (status, latency, threshold = SLOW_THRESHOLD) {
   return status ? 'alive' : 'dead'
 }
 
-export default function Service ({ graph, name, status, latency, description }) {
+export default function Service({
+  graph,
+  name,
+  status,
+  latency,
+  description,
+  uptime,
+}) {
   const state = getServiceState(status, latency)
 
   const title = titles[state]
   const icon = icons[state]
 
-  const className = classnames(
-    'service',
-    `service-${state}`
-  )
+  const className = classnames('service', `service-${state}`)
+  const uptimePercentage = truncateToTwoPlaces(uptime)
 
   return (
     <div className={className}>
       <header>
         <div className="emoji" title={title}>
-          <FontAwesomeIcon title={title} icon={icon}/>
+          <FontAwesomeIcon title={title} icon={icon} />
         </div>
         <h2 className="title">
-          {name} {latency ? (
-            <span className="latency">
-              {Math.round(latency)}ms
+          {name}{' '}
+          {latency ? (
+            <span className="information">
+              {Math.round(latency)}
+              ms ({uptimePercentage}
+              %)
             </span>
           ) : null}
         </h2>
       </header>
-      <p className="description">
-        {description}
-      </p>
-      {graph ? <Graph data={graph}/> : null}
+      <p className="description">{description}</p>
+      {graph ? <Graph data={graph} /> : null}
     </div>
   )
 }
@@ -71,9 +76,7 @@ Service.defaultProps = {
 }
 
 Service.propTypes = {
-  graph: PropTypes.arrayOf(
-    PropTypes.arrayOf(PropTypes.number),
-  ),
+  graph: PropTypes.arrayOf(PropTypes.arrayOf(PropTypes.number)),
   name: PropTypes.string.isRequired,
   status: PropTypes.bool.isRequired,
   latency: PropTypes.number,

priv/frontend/src/components/ServicePlaceholder.js

@@ -5,7 +5,7 @@ import 'react-placeholder/lib/reactPlaceholder.css'
 
 import './ServicePlaceholder.css'
 
-export default function ServicePlaceholder () {
+export default function ServicePlaceholder() {
   return (
     <div className="service-placeholder">
       <div className="title">

priv/frontend/src/components/Stage.js

@@ -3,7 +3,7 @@ import PropTypes from 'prop-types'
 
 import ms from 'ms'
 
-export default function Stage ({ stage }) {
+export default function Stage({ stage }) {
   const { created_at: createdAt, title, content } = stage
   const ago = ms(Date.now() - createdAt * 1000)
 

priv/frontend/src/components/Status.js

@@ -5,21 +5,19 @@ import classnames from 'classnames'
 import './Status.css'
 import Incident from './Incident'
 
-export default function Status ({ incident }) {
+export default function Status({ incident }) {
   const incidentOngoing = incident && incident.ongoing === 1
-  const view = incidentOngoing
-    ? <Incident incident={incident}/>
-    : 'All systems operational'
+  const view = incidentOngoing ? (
+    <Incident incident={incident} />
+  ) : (
+    'All systems operational'
+  )
 
   const className = classnames(
     'status',
-    incidentOngoing ? 'status-bad' : 'status-good',
-  )
-  return (
-    <div className={className}>
-      {view}
-    </div>
+    incidentOngoing ? 'status-bad' : 'status-good'
   )
+  return <div className={className}>{view}</div>
 }
 
 Status.propTypes = {

priv/frontend/src/components/__tests__/DegradedNotice.js

@@ -4,23 +4,34 @@ import { shallow } from 'enzyme'
 import DegradedNotice from '../DegradedNotice'
 
 it('renders without crashing', () => {
-  shallow(<DegradedNotice services={{ first: null, second: null }}/>)
+  shallow(<DegradedNotice services={{ first: null, second: null }} />)
 })
 
 it('shows one service', () => {
-  const comp = shallow(<DegradedNotice services={{ first: null }}/>)
+  const comp = shallow(<DegradedNotice services={{ first: null }} />)
   expect(comp.contains(<header>1 service is unreachable</header>)).toEqual(true)
-  expect(comp.contains(
-    <p>elstat is having trouble contacting <strong>first</strong>.</p>
-  )).toEqual(true)
+  expect(
+    comp.contains(
+      <p>
+        elstat is having trouble contacting <strong>first</strong>.
+      </p>
+    )
+  ).toEqual(true)
 })
 
 it('shows multiple services', () => {
-  const comp = shallow(<DegradedNotice services={{ first: null, second: null, third: null }}/>)
-  expect(comp.contains(
-    <header>3 services are unreachable</header>
-  )).toEqual(true)
-  expect(comp.contains(
-    <p>elstat is having trouble contacting <strong>first, second, third</strong>.</p>
-  )).toEqual(true)
+  const comp = shallow(
+    <DegradedNotice services={{ first: null, second: null, third: null }} />
+  )
+  expect(comp.contains(<header>3 services are unreachable</header>)).toEqual(
+    true
+  )
+  expect(
+    comp.contains(
+      <p>
+        elstat is having trouble contacting{' '}
+        <strong>first, second, third</strong>.
+      </p>
+    )
+  ).toEqual(true)
 })

priv/frontend/src/components/__tests__/Service.js

@@ -3,34 +3,39 @@ import { shallow } from 'enzyme'
 
 import Service, { getServiceState } from '../Service'
 
-const graph = [
-  [1000, 50],
-  [2000, 30],
-  [3000, 60],
-]
+const graph = [[1000, 50], [2000, 30], [3000, 60]]
 
 const props = {
   name: 'sample service',
   description: 'a cool service',
   latency: 50.5,
+  uptime: 99.9994,
 }
 
 describe('<Service/>', () => {
   it('renders without crashing', () => {
-    shallow(<Service graph={null} status {...props}/>)
+    shallow(<Service graph={null} status {...props} />)
   })
 
   it('omits information', () => {
-    const comp = shallow(<Service graph={null} status {...props} latency={null}/>)
+    const comp = shallow(
+      <Service graph={null} status {...props} latency={null} />
+    )
     expect(comp.find('h2.title').text()).toEqual('sample service ')
   })
 
   it('renders proper information', () => {
-    const comp = shallow(<Service graph={graph} status {...props}/>)
+    const comp = shallow(<Service graph={graph} status {...props} />)
     expect(comp.prop('className')).toEqual('service service-alive')
-    expect(comp.find('h2.title').text()).toEqual('sample service 51ms')
-    expect(comp.contains(<p className="description">a cool service</p>)).toEqual(true)
-    expect(comp.contains(<span className="latency">51ms</span>)).toEqual(true)
+    expect(comp.find('h2.title').text()).toEqual(
+      'sample service 51ms (99.9994%)'
+    )
+    expect(
+      comp.contains(<p className="description">a cool service</p>)
+    ).toEqual(true)
+    expect(
+      comp.contains(<span className="information">51ms (99.9994%)</span>)
+    ).toEqual(true)
   })
 })
 

priv/frontend/src/icons.js

@@ -5,10 +5,6 @@ import {
   faExclamationCircle,
 } from '@fortawesome/free-solid-svg-icons'
 
-export default function register () {
-  library.add(
-    faCheckCircle,
-    faTimesCircle,
-    faExclamationCircle,
-  )
+export default function register() {
+  library.add(faCheckCircle, faTimesCircle, faExclamationCircle)
 }

priv/frontend/src/index.js

@@ -7,7 +7,4 @@ import register from './icons.js'
 
 register()
 
-ReactDOM.render(
-  <App/>,
-  document.getElementById('root')
-)
+ReactDOM.render(<App />, document.getElementById('root'))

priv/frontend/src/util.js

@@ -8,14 +8,19 @@ export const logger = ({ name, color }) => (...args) =>
 
 export const log = logger({ name: 'elstat', color: 'purple' })
 
-export function objectFromEntries (entries) {
+export function objectFromEntries(entries) {
   return entries.reduce(
     (object, [key, value]) => ({ ...object, [key]: value }),
     {}
   )
 }
 
-export async function strictFetch (...args) {
+export function truncateToTwoPlaces(number) {
+  // https://stackoverflow.com/a/4187164/2491753
+  return number.toString().match(/^-?\d+(?:\.\d{0,4})?/)[0]
+}
+
+export async function strictFetch(...args) {
   const resp = await fetch(...args)
 
   if (!resp.ok) {

priv/frontend/src/ws/client.js

@@ -5,7 +5,7 @@ import { logger } from '../util'
 const log = logger({ name: 'ws', color: 'green' })
 
 export default class StreamingClient extends NanoEvents {
-  constructor (url, metrics) {
+  constructor(url, metrics) {
     super()
 
     this.url = url
@@ -14,11 +14,11 @@ export default class StreamingClient extends NanoEvents {
     this.delay = 1000
   }
 
-  send (packet) {
+  send(packet) {
     this.ws.send(JSON.stringify(packet))
   }
 
-  subscribe () {
+  subscribe() {
     if (!this.metrics) {
       log('not subscribing to channels -- no initial metrics')
       return
@@ -36,7 +36,7 @@ export default class StreamingClient extends NanoEvents {
     this.send({ op: OP.SUBSCRIBE, channels })
   }
 
-  handle (packet) {
+  handle(packet) {
     const { op, c: channel, d: data } = packet
 
     if ([OP.SUBSCRIBED, OP.UNSUBSCRIBED].includes(op)) {
@@ -52,11 +52,11 @@ export default class StreamingClient extends NanoEvents {
     }
   }
 
-  connect () {
+  connect() {
     const begin = Date.now()
     log('connecting')
 
-    const ws = this.ws = new WebSocket(this.url)
+    const ws = (this.ws = new WebSocket(this.url))
     window.ws = ws
 
     ws.onopen = () => {
@@ -68,7 +68,7 @@ export default class StreamingClient extends NanoEvents {
     ws.onclose = ({ code, reason }) => {
       log(
         `ws closed with code ${code} (reason: ${reason || '<none>'}); ` +
-        `attempting to reconnect in ${this.delay}ms`
+          `attempting to reconnect in ${this.delay}ms`
       )
 
       setTimeout(() => this.connect(), this.delay)