jotai/optics.js

👻 Next gen state management that will spook you

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var jotai = require('jotai');
var O = require('optics-ts');

function focusAtom(baseAtom, callback) {
  var focus = callback(O.optic());
  var derivedAtom = jotai.atom(function (get) {
    var newValue = getValueUsingOptic(focus, get(baseAtom));
    return newValue;
  }, function (_, set, update) {
    var newValueProducer = update instanceof Function ? O.modify(focus)(update) : O.set(focus)(update);
    set(baseAtom, newValueProducer);
  });
  derivedAtom.scope = baseAtom.scope;
  return derivedAtom;
}

var getValueUsingOptic = function getValueUsingOptic(focus, bigValue) {
  if (focus._tag === 'Traversal') {
    var values = O.collect(focus)(bigValue);
    return values;
  }

  if (focus._tag === 'Prism') {
    var _value = O.preview(focus)(bigValue);

    return _value;
  }

  var value = O.get(focus)(bigValue);
  return value;
};

exports.focusAtom = focusAtom;