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useStars.js
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useStars.js
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import { useState, useEffect } from 'react';
import { useLazyQuery } from '@apollo/react-hooks';
import { GetStars } from './query.graphql';
export default function useStars() {
const [loading, setLoading] = useState(false);
const [finished, setFinished] = useState(false);
const [repo, setRepo] = useState(null);
const [data, setData] = useState(undefined);
const [loadStars, { called, data: pageData, variables, error }] = useLazyQuery(GetStars);
useEffect(() => {
if (pageData) {
setLoading(true);
const { stargazers } = pageData.repository;
const { edges, totalCount } = stargazers;
const { hasNextPage, endCursor } = stargazers.pageInfo;
setData((oldData = {}) => {
const tmpObj = {};
edges.forEach(({ node, starredAt }) => {
let dateObj = new Date(starredAt);
let keyVal = `${dateObj.toLocaleDateString(navigator.language, {
month: '2-digit',
day: '2-digit',
year: 'numeric'
})}`;
// 考虑老数据可能有相同key
tmpObj[keyVal] = tmpObj[keyVal]
? tmpObj[keyVal]
: oldData[keyVal]
? oldData[keyVal]
: null;
if (tmpObj[keyVal]) {
tmpObj[keyVal].count = tmpObj[keyVal].count + 1;
tmpObj[keyVal].users = [...tmpObj[keyVal].users, { ...node, starredAt }];
} else {
tmpObj[keyVal] = { count: 1, users: [{ ...node, starredAt }] };
}
});
return { ...oldData, ...tmpObj, total: totalCount };
});
if (hasNextPage) {
loadStars({
variables: {
...variables,
after: endCursor
}
});
} else {
setLoading(false);
setFinished(true);
}
} else if (called) {
setLoading(true);
setFinished(false);
}
}, [pageData, loadStars, called, variables]);
const startLoadStars = ({ owner, name }) => {
setData(undefined);
setFinished(false);
setRepo({ owner, name });
loadStars({
variables: {
owner,
name
}
});
};
return {
startLoadStars,
repo,
data,
loading: loading && !error,
finished,
error
};
}