convex
Version:
Client for the Convex Cloud
41 lines (40 loc) • 1.42 kB
JavaScript
;
import { useEffect, useMemo, useState } from "react";
import { useConvex } from "./client.js";
import { QueriesObserver } from "./queries_observer.js";
import { useSubscription } from "./use_subscription.js";
export function useQueries(queries) {
const convex = useConvex();
if (convex === void 0) {
throw new Error(
"Could not find Convex client! `useQuery` must be used in the React component tree under `ConvexProvider`. Did you forget it? See https://docs.convex.dev/quick-start#set-up-convex-in-your-react-app"
);
}
const createWatch = useMemo(() => {
return (query, args, journal) => {
return convex.watchQuery(query, args, { journal });
};
}, [convex]);
return useQueriesHelper(queries, createWatch);
}
export function useQueriesHelper(queries, createWatch) {
const [observer] = useState(() => new QueriesObserver(createWatch));
if (observer.createWatch !== createWatch) {
observer.setCreateWatch(createWatch);
}
useEffect(() => () => observer.destroy(), [observer]);
const subscription = useMemo(
() => ({
getCurrentValue: () => {
return observer.getLocalResults(queries);
},
subscribe: (callback) => {
observer.setQueries(queries);
return observer.subscribe(callback);
}
}),
[observer, queries]
);
return useSubscription(subscription);
}
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