@civ-clone/core-yield/NegativeYield.js

A `Yield` is a key element in Civilization and can refer to anything from the `Attack` value of a `Unit` to, the `Food` returned for a `Tile` or the `Unhappiness` produced by a `City`.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.makeNegative = exports.NegativeYield = void 0;
const Yield_1 = require("./Yield");
const negate = (value) => {
    if (value instanceof Yield_1.default) {
        return -value.value();
    }
    return -value;
};
class NegativeYield extends Yield_1.default {
    add(value, provider = '') {
        super.add(negate(value), provider);
    }
    set(value, provider = '') {
        super.set(negate(value), provider);
    }
    subtract(value, provider = '') {
        super.subtract(negate(value), provider);
    }
}
exports.NegativeYield = NegativeYield;
exports.default = NegativeYield;
const makeNegative = (Target) => {
    ['add', 'set', 'subtract'].forEach((property) => Object.defineProperty(Target.prototype, property, Object.getOwnPropertyDescriptor(NegativeYield.prototype, property) ||
        Object.create(null)));
};
exports.makeNegative = makeNegative;
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