Add announcement banner to explorer (#11210)

* Add announcement banner to explorer

* Remove ^M and trailing spaces

* Update Banner.tsx

explorer/src/App.tsx

@@ -13,6 +13,7 @@ import TabbedPage from "components/TabbedPage";
 import TopAccountsCard from "components/TopAccountsCard";
 import SupplyCard from "components/SupplyCard";
 import { pickCluster } from "utils/url";
+import Banner from "components/Banner";
 
 function App() {
   return (
@@ -36,6 +37,8 @@ function App() {
           </div>
         </nav>
 
+        <Banner />
+
         <Switch>
           <Route exact path="/supply">
             <TabbedPage tab="Supply">

explorer/src/components/Banner.tsx

@@ -0,0 +1,65 @@
+import React from "react";
+import { useCluster, Cluster } from "providers/cluster";
+import { displayTimestamp } from "utils/date";
+
+type Announcement = {
+  message: string;
+  estimate?: string;
+  start?: Date;
+  end?: Date;
+};
+
+const announcements = new Map<Cluster, Announcement>();
+// announcements.set(Cluster.Devnet, {
+//   message: "Devnet API node is restarting",
+//   start: new Date("July 25, 2020 18:00:00 GMT+8:00"),
+//   estimate: "2 hours",
+// });
+// announcements.set(Cluster.MainnetBeta, {
+//   message: "Mainnet Beta upgrade in progress. Transactions are disabled",
+//   start: new Date("August 1, 2020 00:00:00 GMT+0:00"),
+//   end: new Date("August 3, 2020 00:00:00 GMT+0:00"),
+// });
+
+export default function Banner() {
+  const cluster = useCluster().cluster;
+  const announcement = announcements.get(cluster);
+  if (!announcement) return null;
+  const { message, start, end, estimate } = announcement;
+
+  const now = new Date();
+  if (end && now > end) return null;
+  if (start && now < start) return null;
+
+  return (
+    <div className="bg-danger text-white">
+      <div className="container">
+        <div className="d-flex flex-column align-items-center justify-content-center text-center py-3">
+          <h3 className="mb-3">
+            <span className="fe fe-alert-circle mr-2"></span>
+            {message}
+          </h3>
+          <hr className="text-gray-500 w-100 mt-0 mb-3 opacity-50" />
+          {estimate && (
+            <h5 className="font-sm text-gray-200">
+              <span className="text-uppercase">Estimated Duration: </span>
+              {estimate}
+            </h5>
+          )}
+          {start && (
+            <h5 className="font-sm text-gray-200">
+              <span className="text-uppercase">Started at: </span>
+              {displayTimestamp(start.getTime())}
+            </h5>
+          )}
+          {end && (
+            <h5 className="font-sm text-gray-200">
+              <span className="text-uppercase">End: </span>
+              {displayTimestamp(end.getTime())}
+            </h5>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}

explorer/src/components/ClusterStatusButton.tsx

@@ -27,10 +27,7 @@ function Button({ expand }: { expand?: boolean }) {
     }
   };
 
-  let spinnerClasses = "spinner-grow spinner-grow-sm mr-2";
-  if (!expand) {
-    spinnerClasses += " text-warning";
-  }
+  const spinnerClasses = "spinner-grow spinner-grow-sm mr-2";
 
   switch (status) {
     case ClusterStatus.Connected:

explorer/src/components/TransactionDetails.tsx

@@ -168,7 +168,7 @@ function StatusCard({ signature }: Props) {
           <td>Timestamp</td>
           <td className="text-right">
             {info.timestamp !== "unavailable" ? (
-              displayTimestamp(info.timestamp)
+              displayTimestamp(info.timestamp * 1000)
             ) : (
               <InfoTooltip
                 bottom

explorer/src/components/account/StakeAccountCards.tsx

@@ -27,7 +27,7 @@ export function StakeAccountCards({
 function LockupCard({ stakeAccount }: { stakeAccount: StakeAccount }) {
   const unixTimestamp = stakeAccount.meta?.lockup.unixTimestamp;
   if (unixTimestamp && unixTimestamp > 0) {
-    const prettyTimestamp = displayTimestamp(unixTimestamp);
+    const prettyTimestamp = displayTimestamp(unixTimestamp * 1000);
     return (
       <div className="alert alert-warning text-center">
         <strong>Account is locked!</strong> Lockup expires on {prettyTimestamp}

explorer/src/scss/_solana.scss

@@ -57,10 +57,6 @@ code {
   cursor: pointer;
 }
 
-.b-white {
-  background: $white;
-}
-
 .dropdown-exit {
   position: absolute;
   z-index: 100;
@@ -70,10 +66,8 @@ code {
   bottom: 0;
 }
 
-.btn-outline-warning:hover {
-  .spinner-grow {
-    color: $dark !important;
-  }
+.opacity-50 {
+  opacity: 0.5;
 }
 
 .btn.input-group {

explorer/src/utils/date.ts

@@ -1,5 +1,5 @@
 export function displayTimestamp(unixTimestamp: number): string {
-  const expireDate = new Date(unixTimestamp * 1000);
+  const expireDate = new Date(unixTimestamp);
   const dateString = new Intl.DateTimeFormat("en-US", {
     year: "numeric",
     month: "long",