updux/src/selectors.js

38 lines
971 B
JavaScript

import R from 'remeda';
export function buildSelectors(
localSelectors,
splatSelector = {},
subduxes = {}
) {
const subSelectors = Object.entries(subduxes).map(([slice,{ selectors }]) => {
if (!selectors) return {};
if (slice === '*') return {};
return R.mapValues(
selectors,
(func) => (state) => func(state[slice])
);
});
let splat = {};
for (const name in splatSelector) {
splat[name] =
(state) =>
(...args) => {
const value = splatSelector[name](state)(...args);
const res = () => value;
return merge(
res,
mapValues(
subduxes['*'].selectors,
(selector) => () => selector(value)
)
);
};
}
return R.mergeAll([ ...subSelectors, localSelectors, splat ]);
}