react-obsidian/dist/src/observable/cold/ColdMediatorObservable.js

Dependency injection framework for React and React Native applications

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ColdMediatorObservable = void 0;
const MediatorObservable_1 = require("../mediator/MediatorObservable");
const reflect_1 = require("../../utils/reflect");
class ColdMediatorObservable extends MediatorObservable_1.MediatorObservable {
    constructor(obj, handler = new PropertyAccessTrackingProxy()) {
        super(new Proxy(obj, handler));
        this.handler = handler;
    }
    set value(_) {
        throw new Error('Cannot set value of ColdMediatorObservable, use setValue(value, key) instead');
    }
    get value() {
        return super.value;
    }
    setValue(key, value) {
        if (this.handler.hasAccessedProperty(key)) {
            this.handler.suspendTracking();
            super.value = { ...this.value, [key]: value };
            this.handler.resumeTracking();
        }
    }
    addSource(source, onNext) {
        source.subscribe(onNext);
        return this;
    }
}
exports.ColdMediatorObservable = ColdMediatorObservable;
class PropertyAccessTrackingProxy {
    constructor() {
        this.accessedProperties = new Set();
        this.trackingSuspended = false;
    }
    get(target, p, receiver) {
        if (!this.trackingSuspended) {
            this.accessedProperties.add(p);
        }
        return reflect_1.Reflect.get(target, p, receiver);
    }
    hasAccessedProperty(key) {
        return this.accessedProperties.has(key);
    }
    suspendTracking() {
        this.trackingSuspended = true;
    }
    resumeTracking() {
        this.trackingSuspended = false;
    }
}
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