Added file scanning module.

src/components/atoms/last-scanned/last-scanned.atom.jsx

@@ -0,0 +1,23 @@
+import { Typography } from "antd";
+import React from "react";
+import { connect } from "react-redux";
+import { createStructuredSelector } from "reselect";
+import { selectScanLastScanned } from "../../../redux/scan/scan.selectors";
+import TimeAgoFormatter from "../../atoms/time-ago-formatter/time-ago-formatter.atom";
+
+const mapStateToProps = createStructuredSelector({
+  lastScanned: selectScanLastScanned,
+});
+const mapDispatchToProps = (dispatch) => ({});
+
+export function LastScannedAtom({ lastScanned }) {
+  return (
+    lastScanned && (
+      <Typography.Title level={5}>
+        <span>Last scanned </span>
+        <TimeAgoFormatter>{lastScanned}</TimeAgoFormatter>
+      </Typography.Title>
+    )
+  );
+}
+export default connect(mapStateToProps, mapDispatchToProps)(LastScannedAtom);

src/components/atoms/scan-refresh/scan-refresh.atom.jsx

@@ -0,0 +1,22 @@
+import { Button } from "antd";
+import React from "react";
+import { connect } from "react-redux";
+import { createStructuredSelector } from "reselect";
+import { scanStart } from "../../../redux/scan/scan.actions";
+import { selectScanLoading } from "../../../redux/scan/scan.selectors";
+
+const mapStateToProps = createStructuredSelector({
+  scanLoading: selectScanLoading,
+});
+const mapDispatchToProps = (dispatch) => ({
+  scanStart: () => dispatch(scanStart()),
+});
+
+export function ScanRefreshAtom({ scanLoading, scanStart }) {
+  return (
+    <Button onClick={() => scanStart()} loading={scanLoading}>
+      Refresh
+    </Button>
+  );
+}
+export default connect(mapStateToProps, mapDispatchToProps)(ScanRefreshAtom);

src/components/atoms/time-ago-formatter/time-ago-formatter.atom.jsx

@@ -1,12 +1,19 @@
 import { Tooltip } from "antd";
 import moment from "moment";
-import React from "react";
+import React, { useEffect, useState } from "react";
 
 export default function TimeAgoFormatter(props) {
+  const [timestampString, setTimestampString] = useState("");
   const m = moment(props.children);
+  useEffect(() => {
+    const timer = setInterval(() => setTimestampString(m.fromNow()), 15000);
+    setTimestampString(m.fromNow());
+    return () => clearInterval(timer);
+  }, [m]);
+
   return props.children ? (
     <Tooltip placement="top" title={m.format("MM/DD/YYY hh:mm A")}>
-      {m.fromNow()}
+      {timestampString}
     </Tooltip>
   ) : null;
 }