@coorpacademy/progression-engine/es/rule-engine/apply-instructions.js

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

import reduce from 'lodash/fp/reduce';
import set from 'lodash/fp/set';
import update from 'lodash/fp/update';


const apply = (variables, instruction) => {
  const { type, value, field } = instruction;

  switch (type) {
    case 'set':
      return set(field, value, variables);
    case 'add':
      return update(field, v => {
        if (typeof v === typeof value && (typeof v === 'number' || typeof v === 'string') && (typeof value === 'number' || typeof value === 'string')) return v + value;
        return v;
      }, variables);
    default:
      return variables;
  }
};

const updateVariables = instructions => fromState => {
  const _reduce = reduce(apply, _extends({
    lives: fromState.lives,
    stars: fromState.stars
  }, fromState.variables), instructions),
        { lives, stars } = _reduce,
        variables = _objectWithoutProperties(_reduce, ['lives', 'stars']);

  return _extends({}, fromState, {
    lives,
    stars,
    variables
  });
};

export default updateVariables;
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