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Prevent control page echoing back CRDT updates

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This commit is contained in:
Max Goodhart
2020-07-05 22:56:00 -07:00
parent 904049646d
commit 2cbfc49a2b
1 changed files with 5 additions and 2 deletions
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7
src/web/control.js
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@@ -144,14 +144,17 @@ function useStreamwallConnection(wsEndpoint) {
}, [])
useEffect(() => {
function sendUpdate(update) {
function sendUpdate(update, origin) {
if (origin === 'server') {
return
}
wsRef.current.send(update)
}
function receiveUpdate(ev) {
if (!(ev.data instanceof ArrayBuffer)) {
return
}
Y.applyUpdate(stateDoc, new Uint8Array(ev.data))
Y.applyUpdate(stateDoc, new Uint8Array(ev.data), 'server')
}
stateDoc.on('update', sendUpdate)
wsRef.current.addEventListener('message', receiveUpdate)