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import {
type SubscribePayload,
createClient as createWSClient,
} from "graphql-ws"
import {
Client,
cacheExchange,
fetchExchange,
ssrExchange,
subscriptionExchange,
} from "urql"
const isClientSide = typeof window !== "undefined"
const ssr = ssrExchange({ isClient: isClientSide })
let wsClient: ReturnType<typeof createWSClient>
if (isClientSide) {
const protocol = window.location.protocol === "https:" ? "wss" : "ws"
const port = window.location.port ? `:${window.location.port}` : ""
wsClient = createWSClient({
url: `${protocol}://${window.location.hostname}${port}/ws/graphql`,
})
}
export const client = new Client({
url: "/graphql",
exchanges: [
cacheExchange,
ssr,
fetchExchange,
...(isClientSide
? [
subscriptionExchange({
forwardSubscription(operation) {
return {
subscribe: (sink) => {
const dispose = wsClient.subscribe(
operation as SubscribePayload,
sink,
)
return {
unsubscribe: dispose,
}
},
}
},
}),
]
: []),
],
})
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