jotai/umd/optics.development.js

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('optics-ts'), require('jotai')) :
  typeof define === 'function' && define.amd ? define(['exports', 'optics-ts', 'jotai'], factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.jotaiOptics = {}, global.O, global.jotai));
})(this, (function (exports, O, jotai) { 'use strict';

  function _interopNamespace(e) {
    if (e && e.__esModule) return e;
    var n = Object.create(null);
    if (e) {
      Object.keys(e).forEach(function (k) {
        if (k !== 'default') {
          var d = Object.getOwnPropertyDescriptor(e, k);
          Object.defineProperty(n, k, d.get ? d : {
            enumerable: true,
            get: function () { return e[k]; }
          });
        }
      });
    }
    n["default"] = e;
    return Object.freeze(n);
  }

  var O__namespace = /*#__PURE__*/_interopNamespace(O);

  var getWeakCacheItem = function getWeakCacheItem(cache, deps) {
    do {
      var _deps = deps,
          dep = _deps[0],
          rest = _deps.slice(1);

      var entry = cache.get(dep);

      if (!entry) {
        return;
      }

      if (!rest.length) {
        return entry[1];
      }

      cache = entry[0];
      deps = rest;
    } while (deps.length);
  };

  var setWeakCacheItem = function setWeakCacheItem(cache, deps, item) {
    do {
      var _deps2 = deps,
          dep = _deps2[0],
          rest = _deps2.slice(1);

      var entry = cache.get(dep);

      if (!entry) {
        entry = [new WeakMap()];
        cache.set(dep, entry);
      }

      if (!rest.length) {
        entry[1] = item;
        return;
      }

      cache = entry[0];
      deps = rest;
    } while (deps.length);
  };

  var createMemoizeAtom = function createMemoizeAtom() {
    var cache = new WeakMap();

    var memoizeAtom = function memoizeAtom(createAtom, deps) {
      var cachedAtom = getWeakCacheItem(cache, deps);

      if (cachedAtom) {
        return cachedAtom;
      }

      var createdAtom = createAtom();
      setWeakCacheItem(cache, deps, createdAtom);
      return createdAtom;
    };

    return memoizeAtom;
  };

  var memoizeAtom = createMemoizeAtom();

  var isFunction = function isFunction(x) {
    return typeof x === 'function';
  };

  function focusAtom(baseAtom, callback) {
    return memoizeAtom(function () {
      var focus = callback(O__namespace.optic());
      var derivedAtom = jotai.atom(function (get) {
        return getValueUsingOptic(focus, get(baseAtom));
      }, function (get, set, update) {
        var newValueProducer = isFunction(update) ? O__namespace.modify(focus)(update) : O__namespace.set(focus)(update);
        return set(baseAtom, newValueProducer(get(baseAtom)));
      });
      return derivedAtom;
    }, [baseAtom, callback]);
  }

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

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

      return _value;
    }

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

  exports.focusAtom = focusAtom;

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

}));