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add comments about qr code scanner #418

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add comments about qr code scanner #418

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8 changes: 7 additions & 1 deletion src/pages/admin/Event/EventStats/EventStatsTable.js
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Original file line number Diff line number Diff line change
Expand Up @@ -797,6 +797,7 @@ const QrCheckIn = (props) => {
// when wanting to re-scan (requires a manual reset)
// if (data.data !== qrCode.data) setQrCode(data);

// sets the Qrcode to the data prop from the QRReader component
setQrCode(data);
};

Expand All @@ -813,8 +814,9 @@ const QrCheckIn = (props) => {
return /(.+)@(.+){2,}\.(.+){2,}/.test(email);
}

// checks if the QR code is valid whenever the QR code is changed
// checks if the QR code is valid whenever the QR code is changed (qr code is a dependancy of this useEffect)
useEffect(() => {
// function that sets the user's registration status to checked in and resets ths QRcode reader after 10s
const checkInUser = (id, fname) => {
const body = {
eventID: props.event.id,
Expand Down Expand Up @@ -857,8 +859,10 @@ const QrCheckIn = (props) => {
return;
}

// retrieves user that matches the userID from the QrCode
const user = props.rows?.filter((row) => row.id === userID)[0];

// if user doesn't exist then fail QR scan
if (!user) {
cycleQrScanStage(QR_SCAN_STAGE.FAILED, 6000);
setError("Person is not registered for this event.");
Expand Down Expand Up @@ -896,6 +900,7 @@ const QrCheckIn = (props) => {
return;
}

// if non of the previous checks failed, checkin user and reset qr scanner
checkInUser(userID, userFName);

// eslint-disable-next-line react-hooks/exhaustive-deps
Expand Down Expand Up @@ -942,6 +947,7 @@ const QrCheckIn = (props) => {
alignItems: "center"
}}
>
{/* Uses public react package qr-reader */}
<QrReader
style={styles.qrCodeVideo}
onScan={handleScanQR}
Expand Down