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| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | 21x 21x 94x 94x 94x 94x 94x 94x 94x 12x 12x 12x 12x 12x 12x 9x 9x 9x 9x 9x 1x 1x 8x 8x 8x 8x 8x 5x 5x 3x 3x 3x 2x 2x 2x 2x 8x 8x 94x 71x 71x 71x 94x 71x 71x 94x | import { useEffect, useRef, useState, createContext } from 'react';
import axios from 'axios';
import { events } from 'app';
import { Entities, Entity, Events } from 'types';
type Cache<T = any> = {
[key: string]: T;
};
type MakeSearch = {
entity: Entities;
search: string;
};
type FetchDataArgs = CustomEvent<MakeSearch>;
type SearchContextData = {
data: Entity[];
isFetching: boolean;
};
type SearchProviderProps = {
children: React.ReactNode;
};
const SearchContext = createContext<SearchContextData>({} as SearchContextData);
const SearchProvider = ({ children }: SearchProviderProps) => {
const cacheRef = useRef<Cache>({});
const abortRef = useRef<AbortController>();
const entityRef = useRef<Entities>(Entities.CHARACTERS);
const searchRef = useRef('');
const [data, setData] = useState<Entity[]>([]);
const [isFetching, setIsFetching] = useState(false);
const fetchData = async (event: FetchDataArgs) => {
const saveEntity = entityRef.current;
const saveSearch = searchRef.current;
const { entity = saveEntity, search = saveSearch } = event.detail;
entityRef.current = entity;
searchRef.current = search;
if (!search) return;
abortRef.current?.abort();
const cache = cacheRef.current;
const key = `${entity}-${search}`;
const result = cache[key];
if (result) {
setData(result);
return;
}
try {
setIsFetching(true);
const abortController = new AbortController();
abortRef.current = abortController;
const { data } = await axios.get<Entity[]>('/api/data', {
params: { entity, search },
signal: abortController.signal,
});
cacheRef.current[key] = data;
setData(data);
} catch (err) {
console.error(err);
const wasCanceled =
err instanceof Object && err.constructor.name === 'Cancel';
if (wasCanceled) return;
const defaultErrorMessage =
'An error has occurred, try again or come back soon';
const error = axios.isAxiosError(err)
? err.response?.data.error
: defaultErrorMessage;
setData([]);
events.search.error(error);
} finally {
setIsFetching(false);
abortRef.current = undefined;
}
};
useEffect(() => {
events.on(Events.MAKE_SEARCH, fetchData);
return () => {
events.off(Events.MAKE_SEARCH, fetchData);
};
}, []);
useEffect(() => {
return () => {
abortRef.current?.abort();
};
}, []);
return (
<SearchContext.Provider value={{ data, isFetching }}>
{children}
</SearchContext.Provider>
);
};
export { SearchProvider, SearchContext };
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