@plteam/chat-ui/dist/utils/observers/ObservableReactValue.js

CUI Kit is a free and open-source library for creating AI assistant chat interfaces, built with React, Material UI, and TypeScript

import { randomId } from '../numberUtils/randomInt';
export class ObservableReactValue {
    _value;
    debug;
    _listeners = [];
    constructor(_value, debug = false) {
        this._value = _value;
        this.debug = debug;
    }
    get value() {
        return this._value;
    }
    set value(newValue) {
        this.setValue(newValue);
    }
    setValue(newValue) {
        if (this._value !== newValue) {
            this._value = newValue;
            if (this.debug)
                console.trace('set new messages', newValue);
            this._listeners.map(v => v.fn());
        }
    }
    getSnapshot = () => this.value;
    subscribe = (callback) => {
        const key = `key${randomId()}`;
        this._listeners.push({ key, fn: callback });
        return () => {
            const index = this._listeners.findIndex(v => v.key === key);
            if (index >= 0) {
                this._listeners.splice(index, 1);
            }
        };
    };
}