Files
cinny/src/app/state/list.ts
T
Lotus Bot 61a1f008d0 chore: upgrade i18next 26, prettier 3, fontsource-variable, domhandler 6, lint-staged 17
- i18next 23->26 + react-i18next 15->17
- prettier 2->3, reformat all files
- replace @fontsource/inter with @fontsource-variable/inter 5, update import path
- domhandler 5->6 (aligns with transitive deps)
- lint-staged 16->17
2026-05-21 23:30:50 -04:00

46 lines
1.1 KiB
TypeScript

import { atom } from 'jotai';
export type ListAction<T> =
| {
type: 'PUT';
item: T | T[];
}
| {
type: 'REPLACE';
item: T;
replacement: T;
}
| {
type: 'DELETE';
item: T | T[];
};
export const createListAtom = <T>() => {
const baseListAtom = atom<T[]>([]);
return atom<T[], [ListAction<T>], undefined>(
(get) => get(baseListAtom),
(get, set, action) => {
const items = get(baseListAtom);
const newItems = Array.isArray(action.item) ? action.item : [action.item];
if (action.type === 'DELETE') {
set(
baseListAtom,
items.filter((item) => !newItems.includes(item)),
);
return;
}
if (action.type === 'PUT') {
set(baseListAtom, [...items, ...newItems]);
return;
}
if (action.type === 'REPLACE') {
set(
baseListAtom,
items.map((item) => (item === action.item ? action.replacement : item)),
);
}
},
);
};
export type TListAtom<T> = ReturnType<typeof createListAtom<T>>;