opendash/dist/classes/Store.js

open.DASH data visualization framework

import produce from "immer";
var Store = /** @class */ (function () {
    function Store(initialState) {
        this.watcher = new Set();
        this.selectorCache = new Map();
        this._state = initialState;
    }
    Store.prototype.state = function () {
        return this._state;
    };
    Store.prototype.select = function (selector) {
        return selector(this._state);
    };
    Store.prototype.update = function (callbackOrState) {
        if (typeof callbackOrState === "function") {
            this._state = produce(this._state, callbackOrState);
        }
        else {
            this._state = callbackOrState;
        }
        this.watcher.forEach(function (callback) {
            try {
                callback();
            }
            catch (error) {
                console.error("Error in Store subscription callback:", error);
            }
        });
    };
    Store.prototype.subscribe = function (callback) {
        var _this = this;
        this.watcher.add(callback);
        return function () {
            _this.watcher.delete(callback);
        };
    };
    Store.prototype.subscribeSelection = function (selector, callback) {
        var _this = this;
        var selectorCallback = function () {
            var cache = _this.selectorCache.get(selector);
            var selection = selector(_this._state);
            if (!cache || cache !== selection) {
                _this.selectorCache.set(selector, selection);
                callback();
            }
        };
        this.watcher.add(selectorCallback);
        return function () {
            _this.watcher.delete(selectorCallback);
            _this.selectorCache.delete(selector);
        };
    };
    return Store;
}());
export { Store };
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