Created
March 20, 2020 15:45
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| const People = () => { | |
| const peopleContext = useContext(PeopleContext) | |
| const [people, sort, setSortField] = useSort({ | |
| items: peopleContext.people ?? [], | |
| fields: { | |
| name: { | |
| method: 'compare', | |
| getValue: ({ firstName, lastName }) => `${lastName} ${firstName}`, | |
| order: 'asc' | |
| }, | |
| registered: { | |
| method: 'simple', | |
| getValue: ({ registeredAt }) => parseISO(registeredAt).getTime(), | |
| order: 'desc' | |
| } | |
| }, | |
| defaultField: 'name', | |
| storageKey: 'list:people:sort', | |
| makeSalt: items => items.map(({ id }) => id).join() | |
| }) | |
| return ( | |
| <> | |
| {people.map(person => ( | |
| ... | |
| ))} | |
| </> | |
| ) | |
| } |
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| import { useState, useEffect } from 'react' | |
| import { useIntl } from 'react-intl' | |
| import { useStorage } from 'hooks/storage' | |
| export const useSort = ({ items, fields, defaultField, storageKey, makeSalt }) => { | |
| items = [...items] | |
| const salt = makeSalt(items) | |
| const { locale } = useIntl() | |
| const [sortedItems, setSortedItems] = useState([]) | |
| const defaultSort = { | |
| by: defaultField, | |
| order: fields[defaultField].order | |
| } | |
| const [sort, setSort] = useStorage(storageKey, defaultSort) | |
| if(!(sort.by in fields)) { | |
| setSort(defaultSort) | |
| } | |
| const setSortField = field => setSort({ | |
| by: field, | |
| order: (sort.by === field) ? | |
| (sort.order === 'asc' ? 'desc' : 'asc') : | |
| fields[field].order | |
| }) | |
| useEffect(() => { | |
| const { getValue, method } = fields[sort.by] | |
| setSortedItems(items.sort((one, two) => { | |
| const orderModifier = sort.order === 'desc' ? -1 : 1 | |
| one = getValue(one) | |
| if(!one) { | |
| return 1 * orderModifier | |
| } | |
| two = getValue(two) | |
| if(!two) { | |
| return -1 * orderModifier | |
| } | |
| if(one === two) { | |
| return 0 | |
| } | |
| let comparison = 0 | |
| if(method === 'simple') { | |
| comparison = one - two | |
| } | |
| if(method === 'compare') { | |
| comparison = one.localeCompare(two, locale, { sensitivity: 'base' }) | |
| } | |
| return comparison * orderModifier | |
| })) | |
| }, [sort.by, sort.order, locale, salt]) | |
| return [sortedItems, sort, setSortField] | |
| } |
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