@dhmk/atom/esm/atoms/effect.js

Lightweight mobx-like observable values, computed values and side-effects

var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
import { AtomState, defaultEffectOptions, } from "../types";
import { runtime } from "../runtime";
import { reportError } from "../shared";
import { ComputedAtom } from "./computed";
var EffectAtom = /** @class */ (function (_super) {
    __extends(EffectAtom, _super);
    function EffectAtom(fn, effectOptions) {
        var _this = _super.call(this, fn, {
            equals: function () { return false; },
            onBecomeObserved: effectOptions === null || effectOptions === void 0 ? void 0 : effectOptions.onBecomeObserved,
            onBecomeUnobserved: effectOptions === null || effectOptions === void 0 ? void 0 : effectOptions.onBecomeUnobserved,
        }) || this;
        _this.isObserved = true;
        _this.isCalculating = false;
        _this.isDisposed = false;
        _this.shouldRecalc = false;
        _this.effectOptions = __assign(__assign({}, defaultEffectOptions), effectOptions);
        var actualize = _super.prototype.actualize.bind(_this);
        _this.run = function () {
            if (!_this.isObserved)
                return;
            runtime.addEffect({ actualize: actualize });
            runtime.runEffects();
        };
        return _this;
    }
    EffectAtom.prototype.invalidate = function (state, isValueAtom) {
        _super.prototype.invalidate.call(this, state, isValueAtom);
        runtime.addEffect(this);
        if (isValueAtom)
            this.shouldRecalc = true;
    };
    EffectAtom.prototype.calculate = function () {
        if (this.isDisposed)
            return;
        this.shouldRecalc = false;
        this.isCalculating = true;
        _super.prototype.calculate.call(this);
        this.isCalculating = false;
        if (this.isError) {
            runtime.addEffect({ actualize: reportError(this.value) });
        }
        if (this.shouldRecalc) {
            this.state = AtomState.Stale;
        }
        if (this.isDisposed) {
            this.dispose();
        }
    };
    EffectAtom.prototype.actualize = function () {
        this.effectOptions.scheduler(this.run);
    };
    EffectAtom.prototype.dispose = function () {
        this.isDisposed = true;
        if (this.isCalculating)
            return;
        _super.prototype.dispose.call(this);
        runtime.runEffects();
    };
    EffectAtom.prototype.start = function () {
        this.invalidate(AtomState.Stale, false);
        runtime.runEffects();
    };
    return EffectAtom;
}(ComputedAtom));
export { EffectAtom };