Fix exchange summary

frontend/src/components/Dialogs/Exchange.tsx

@@ -1,4 +1,4 @@
-import React, { useContext } from 'react';
+import React, { useContext, useEffect, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 
 import {
@@ -35,16 +35,25 @@ interface Props {
 const ExchangeDialog = ({ open = false, onClose }: Props): JSX.Element => {
   const { t } = useTranslation();
   const { federation } = useContext(FederationContext);
+  const [loadingInfo, setLoadingInfo] = useState<boolean>(true);
+
+  useEffect(() => {
+    if (open) federation.loadInfo();
+  }, [open]);
+
+  useEffect(() => {
+    setLoadingInfo(federation.loading);
+  }, [federation.loading]);
 
   return (
     <Dialog open={open} onClose={onClose}>
-      <div style={federation.loading ? {} : { display: 'none' }}>
-        <LinearProgress variant='indeterminate' />
-      </div>
       <DialogContent>
         <Typography component='h5' variant='h5'>
           {t('Exchange Summary')}
         </Typography>
+        <div style={loadingInfo ? {} : { display: 'none' }}>
+          <LinearProgress variant='indeterminate' />
+        </div>
 
         <List dense>
           <ListItem>

frontend/src/models/Federation.model.ts

@@ -176,6 +176,9 @@ export class Federation {
       lifetime_volume: 0,
       version: { major: 0, minor: 0, patch: 0 },
     };
+    this.loading = true;
+    this.exchange.onlineCoordinators = 0;
+    this.exchange.loadingCoordinators = Object.keys(this.coordinators).length;
     this.updateEnabledCoordinators();
 
     for (const coor of Object.values(this.coordinators)) {