File size: 2,711 Bytes
1e92f2d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | import React, { useState, useEffect, useMemo, useContext } from 'react';
import { instantSearchContext } from 'react-instantsearch-core';
import { createConcurrentSafePromise } from '../lib/createConcurrentSafePromise';
import { debounce } from '../lib/debounce';
function hasReactHooks() {
// >= 16.8.0
const [major, minor] = React.version.split('.').map(Number);
return major >= 17 || (major === 16 && minor >= 8);
}
export default function useAnswers({
searchClient,
queryLanguages,
attributesForPrediction,
nbHits,
renderDebounceTime = 100,
searchDebounceTime = 100,
...extraParameters
}) {
if (!hasReactHooks()) {
throw new Error(
`\`Answers\` component and \`useAnswers\` hook require all React packages to be 16.8.0 or higher.`
);
}
const context = useContext(instantSearchContext);
const [query, setQuery] = useState(context.store.getState().widgets.query);
const [index, setIndex] = useState(context.mainTargetedIndex);
const [isLoading, setIsLoading] = useState(false);
const [hits, setHits] = useState([]);
const runConcurrentSafePromise = useMemo(
() => createConcurrentSafePromise(),
[]
);
const searchIndex = useMemo(
() => searchClient.initIndex(index),
[searchClient, index]
);
if (!searchIndex.findAnswers) {
throw new Error(
'`Answers` component and `useAnswers` hook require `algoliasearch` to be 4.8.0 or higher.'
);
}
const debouncedSearch = useMemo(() => {
return debounce(searchIndex.findAnswers, searchDebounceTime);
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [searchIndex]);
useEffect(() => {
setIndex(context.mainTargetedIndex);
return context.store.subscribe(() => {
const { widgets } = context.store.getState();
setQuery(widgets.query);
});
}, [context]);
const setDebouncedResult = useMemo(
() =>
debounce((result) => {
setIsLoading(false);
setHits(result.hits);
}, renderDebounceTime),
// eslint-disable-next-line react-hooks/exhaustive-deps
[setIsLoading, setHits]
);
const fetchAnswers = () => {
if (!query) {
setIsLoading(false);
setHits([]);
return;
}
setIsLoading(true);
runConcurrentSafePromise(
debouncedSearch(query, queryLanguages, {
...extraParameters,
nbHits,
attributesForPrediction,
})
).then((result) => {
if (!result) {
// It's undefined when it's debounced.
return;
}
setDebouncedResult(result);
});
};
useEffect(() => {
fetchAnswers();
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [query]);
return { hits, isLoading };
}
|