unsubscribe-decorator/dist/unsubscribe-decorator.js

A decorator to unsubscribe from RxJs observables

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Unsubscribe = void 0;
const takeUntil_1 = require("rxjs/internal/operators/takeUntil");
const Subject_1 = require("rxjs/internal/Subject");
function Unsubscribe(params) {
    return function (target, propertyKey) {
        params = {
            destroyFunc: 'ngOnDestroy',
            ...params
        };
        const destroy$ = new Subject_1.Subject();
        let observable;
        Object.defineProperty(target, propertyKey, {
            get() {
                return observable;
            },
            set(val) {
                observable = val.pipe(takeUntil_1.takeUntil(destroy$));
            }
        });
        if (typeof target[params.destroyFunc] !== 'function') {
            throw new Error(`${target.constructor.name} must implement ${params.destroyFunc}() lifecycle hook`);
        }
        target[params.destroyFunc] = ngOnDestroyDecorator(target[params.destroyFunc]);
        function ngOnDestroyDecorator(f) {
            return function () {
                destroy$.next();
                destroy$.complete();
                return f.apply(target, arguments);
            };
        }
        return target;
    };
}
exports.Unsubscribe = Unsubscribe;
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