general code cleanup/refactoring

priv/frontend/src/components/Dashboard.js

@@ -35,6 +35,7 @@ export default class Dashboard extends Component {
     const endpoint = `${DOMAIN}/api/streaming`
       .replace('https', 'wss')
       .replace('http', 'ws')
+
     this.client = new StreamingClient(endpoint, this.state.metrics)
     this.client.connect()
 
@@ -110,50 +111,62 @@ export default class Dashboard extends Component {
     this.setState({ incident: await resp.json() })
   }
 
-  render () {
-    let metrics = null
+  renderNotice (services) {
+    const down = services.filter(([, { status }]) => !status)
 
-    if (this.state.metrics) {
-      const allServices = Object.entries(this.state.metrics.status)
-      const graphs = this.state.metrics.graph
-
-      const services = allServices.map(([name, info]) => (
-        <Service name={name} key={name} graph={graphs[name]} {...info}/>
-      ))
-
-      const down = allServices.filter(([, { status }]) => !status)
-      let notice = <Status incident={this.state.incident}/>
-      if (!this.state.incident && down.length > 0) {
-        notice = down.length > 0
-          ? <DegradedNotice services={objectFromEntries(down)}/>
-          : null
-      }
-
-      metrics = (
-        <div className="services">
-          {notice}
-          {services}
-        </div>
-      )
+    // 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 <Status incident={this.state.incident}/>
+  }
+
+  renderServices (services) {
+    const { graph: graphs } = this.state.metrics
+    return services.map(([name, info]) => (
+      <Service name={name} key={name} graph={graphs[name]} {...info}/>
+    ))
+  }
+
+  renderPlaceholders () {
+    return (
+      <React.Fragment>
+        <ServicePlaceholder/>
+        <ServicePlaceholder/>
+        <ServicePlaceholder/>
+      </React.Fragment>
+    )
+  }
+
+  renderDashboardContent () {
+    if (this.state.error) {
+      return <div className="error">{this.state.error}</div>
+    }
+
+    if (this.state.loading) {
+      return this.renderPlaceholders()
+    }
+
+    const allServices = Object.entries(this.state.metrics.status)
+
+    const services = this.renderServices(allServices)
+    const notice = this.renderNotice(allServices)
+
+    return (
+      <React.Fragment>
+        {notice}
+        {services}
+      </React.Fragment>
+    )
+  }
+
+  render () {
     return (
       <div className="dashboard">
         <h1>elstatus</h1>
-
-        {this.state.error ? (
-          <div className="error">
-            {this.state.error}
-          </div>
-        ) : null}
-
-        {this.state.loading && !this.state.error ? (
-          <React.Fragment>
-            <ServicePlaceholder/>
-            <ServicePlaceholder/>
-            <ServicePlaceholder/>
-          </React.Fragment>
-        ) : metrics}
+        {this.renderDashboardContent()}
       </div>
     )
   }

priv/frontend/src/components/DegradedNotice.js

@@ -3,7 +3,7 @@ import PropTypes from 'prop-types'
 
 import './DegradedNotice.css'
 
-const DegradedNotice = ({ services }) => {
+export default function DegradedNotice ({ services }) {
   const keys = Object.keys(services)
   const serviceNames = keys.join(', ')
 
@@ -23,5 +23,3 @@ const DegradedNotice = ({ services }) => {
 DegradedNotice.propTypes = {
   services: PropTypes.object.isRequired,
 }
-
-export default DegradedNotice

priv/frontend/src/components/Incident.js

@@ -12,7 +12,7 @@ const OUTAGE_TYPES = {
   degraded_service: 'Degraded Service',
 }
 
-const Incident = ({ incident }) => {
+export default function Incident ({ incident }) {
   const { content, end_date: end, start_date: start, title, type, stages } = incident
   const ago = ms(Date.now() - start * 1000)
   const agoEnd = end ? ms(Date.now - end * 1000) : null
@@ -51,5 +51,3 @@ Incident.propTypes = {
     stages: PropTypes.array,
   }),
 }
-
-export default Incident

priv/frontend/src/components/Service.js

@@ -38,7 +38,7 @@ function getServiceState (status, latency) {
   return status ? 'alive' : 'dead'
 }
 
-const Service = ({ graph, name, status, latency, description }) => {
+export default function Service ({ graph, name, status, latency, description }) {
   const state = getServiceState(status, latency)
 
   const title = titles[state]
@@ -81,5 +81,3 @@ Service.propTypes = {
   latency: PropTypes.number,
   description: PropTypes.string.isRequired,
 }
-
-export default Service

priv/frontend/src/components/ServicePlaceholder.css

@@ -7,3 +7,23 @@
   grid-template-columns: 3rem 1fr;
   grid-gap: 1rem;
 }
+
+.service-placeholder .emoji {
+  width: 3rem !important;
+  height: 3rem !important;
+}
+
+.service-placeholder .name {
+  width: 100% !important;
+  height: 3rem !important;
+}
+
+.service-placeholder .text {
+  margin-top: 1rem !important;
+}
+
+.service-placeholder .graph {
+  width: 100% !important;
+  height: 175px !important;
+  margin-top: 1rem !important;
+}

priv/frontend/src/components/ServicePlaceholder.js

@@ -5,45 +5,44 @@ import 'react-placeholder/lib/reactPlaceholder.css'
 
 import './ServicePlaceholder.css'
 
-const ServicePlaceholder = () => (
-  <div className="service-placeholder">
-    <div className="title">
+export default function ServicePlaceholder () {
+  return (
+    <div className="service-placeholder">
+      <div className="title">
+        <ReactPlaceholder
+          type="round"
+          ready={false}
+          showLoadingAnimation
+          className="emoji"
+        >
+          {' '}
+        </ReactPlaceholder>
+        <ReactPlaceholder
+          type="rect"
+          ready={false}
+          showLoadingAnimation
+          className="name"
+        >
+          {' '}
+        </ReactPlaceholder>
+      </div>
       <ReactPlaceholder
-        type="round"
+        type="text"
         ready={false}
-        style={{ width: '3rem', height: '3rem' }}
-        className="emoji"
+        rows={1}
         showLoadingAnimation
+        className="text"
       >
         {' '}
       </ReactPlaceholder>
       <ReactPlaceholder
         type="rect"
         ready={false}
-        style={{ width: '100%', height: '3rem' }}
         showLoadingAnimation
+        className="graph"
       >
         {' '}
       </ReactPlaceholder>
     </div>
-    <ReactPlaceholder
-      type="text"
-      ready={false}
-      rows={1}
-      style={{ marginTop: '1rem' }}
-      showLoadingAnimation
-    >
-      {' '}
-    </ReactPlaceholder>
-    <ReactPlaceholder
-      type="rect"
-      ready={false}
-      style={{ width: '100%', height: '175px', marginTop: '1rem' }}
-      showLoadingAnimation
-    >
-      {' '}
-    </ReactPlaceholder>
-  </div>
-)
-
-export default ServicePlaceholder
+  )
+}

priv/frontend/src/components/Stage.js

@@ -3,7 +3,7 @@ import PropTypes from 'prop-types'
 
 import ms from 'ms'
 
-const Stage = ({ stage }) => {
+export default function Stage ({ stage }) {
   const { created_at: createdAt, title, content } = stage
   const ago = ms(Date.now() - createdAt * 1000)
 
@@ -21,7 +21,5 @@ Stage.propTypes = {
     created_at: PropTypes.number,
     title: PropTypes.string,
     content: PropTypes.string,
-  })
+  }),
 }
-
-export default Stage

priv/frontend/src/components/Status.js

@@ -5,7 +5,7 @@ import classnames from 'classnames'
 import './Status.css'
 import Incident from './Incident'
 
-const Status = ({ incident }) => {
+export default function Status ({ incident }) {
   let view = null
   if (incident) {
     view = <Incident incident={incident}/>
@@ -27,5 +27,3 @@ const Status = ({ incident }) => {
 Status.propTypes = {
   incident: PropTypes.object,
 }
-
-export default Status