ngx-decorate/LazySubject.js

Useful decorators for Angular 2 and above

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const ensureSymbol_1 = require("./lib/ensureSymbol");
const HookManager_1 = require("./lib/HookManager");
const symbols_1 = require("./lib/symbols");
const lazy_subject_1 = require("./processors/lazy-subject");
/**
 * Decorate a getter that returns a subject. The subject will automatically get completed
 * when the component/service/pipe is destroyed.
 */
function LazySubject() {
    return (_target, key, desc) => {
        const orig = desc.get;
        if (!orig) {
            throw new Error('LazySubject can only decorate getters');
        }
        desc.get = function () {
            const value = orig.apply(this, arguments);
            Object.defineProperty(this, key, {
                configurable: true,
                enumerable: desc.enumerable,
                value
            });
            ensureSymbol_1.ensureSymbol(this, symbols_1._lazySubj, []).push(value);
            return value;
        };
        HookManager_1.HookManager.for(_target).add(3 /* POST_DESTROY */, lazy_subject_1.lazySubj);
    };
}
exports.LazySubject = LazySubject;
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