fix legend conditional

src/DeckLayers/StationTooltip.js

@@ -9,7 +9,6 @@ import { moment } from "../util/time.js"
 const SensorTooltip = props => {
   const { d, label, unit } = props
 
-  //const dataAgeText = d.dataAge < 1 ? texts.lastHour : `${roundBy(d.dataAge, 0)} ${texts.hoursAgo}`
   const dataAgeText = `${ moment(d.timestamp).format("HH") }-${ moment(d.timestamp).add(1, 'hours').format("HH") }${texts.hourShort}`
 
   return (

src/Modal/StationInfo.js

@@ -286,7 +286,7 @@ class StationInfo extends React.Component {
             <footer id="chart-footer">
               <span className="hint-time-selection">{ texts.timeSelectionHint }</span>
 
-              { Object.keys(dataStreams).length > 1 &&
+              { Object.keys(dataStreams[Object.keys(dataStreams)[0]]).length > 1 &&
                 <ul id="chart-data-selection">
                   { Object.keys(dataStreams).map(i => 
                     <li key={i} className="data-stream">

src/util/time.js

@@ -84,3 +84,27 @@ export const subtractOneHourISO = (datestring) => {
 //     + 'T' + pad(now.getUTCHours())
 //     + ':00:00.000Z'
 // }
+
+
+export const getDataAge = (timestamp, granularity, timestamp_end = false) => {
+  const diff = new Date() - new Date(timestamp)
+
+  let unit
+  switch (granularity) {
+    case "minutely":
+      unit = 216000000
+      break;
+    case "daily":
+      unit = 150000
+      break;
+    // default is hourly
+    default:
+      unit = 3600000
+    break;
+  }
+
+  let inUnit = diff / unit
+  if(timestamp_end) inUnit -= unit
+
+  return inUnit
+}
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