@dillonkearns/elm-graphql/examples/src/subscription/node_modules/flow-static-land/lib/PPrism.js

<img src="https://cdn.jsdelivr.net/gh/martimatix/logo-graphqelm/logo.svg" alt="dillonearns/elm-graphql logo" width="40%" align="right">

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.modify = modify;
exports.createSSAB = createSSAB;
exports.asOptional = asOptional;
exports.composePrism = composePrism;

var _Either = require('./Either');

var either = _interopRequireWildcard(_Either);

var _Maybe = require('./Maybe');

var maybe = _interopRequireWildcard(_Maybe);

var _Identity = require('./Identity');

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function modify(stab, f, s) {
  return either.either(_Identity.id, function (a) {
    return stab.reverseGet(f(a));
  }, stab.getOrModify(s));
}

function createSSAB(getOption, reverseGet) {
  return {
    getOrModify: function getOrModify(s) {
      return maybe.maybe(either.left(s), either.right, getOption(s));
    },

    reverseGet: reverseGet
  };
}

function asOptional(prism) {
  return {
    getOrModify: prism.getOrModify,
    set: function set(b) {
      return prism.reverseGet(b);
    }
  };
}

function composePrism(abcd, stab) {
  return {
    getOrModify: function getOrModify(s) {
      return either.chain(function (a) {
        return either.bimap(stab.reverseGet, _Identity.id, abcd.getOrModify(a));
      }, stab.getOrModify(s));
    },
    reverseGet: function reverseGet(d) {
      return stab.reverseGet(abcd.reverseGet(d));
    }
  };
}