@ortoo/angular-resource/lib/emitter.js

Magical CRUD resource management for angular

import { Subject } from 'rxjs/Subject';
export { Subscription } from 'rxjs/Subscription';
export class EventEmitter {
    constructor() {
        this.subjects = new Map();
        this.subscriptions = new Map();
    }
    dispose() {
        this.subjects.forEach((subject) => {
            subject.unsubscribe();
        });
        this.subjects.clear();
    }
    addListener(name, handler) {
        return this.on(name, handler);
    }
    emit(fnName, ...data) {
        let subject = this.getSubject(fnName);
        subject.next(data);
    }
    listen(name, handler) {
        let subscription = this.getSubject(name).subscribe(handler);
        this.registerSubscription(name, handler, subscription);
        return subscription;
    }
    off(name, handler) {
        let subs = this.getSubscriptions(name, handler);
        subs.forEach(sub => sub.unsubscribe());
    }
    on(name, handler) {
        let subscription = this.getSubject(name).subscribe(val => {
            if (Array.isArray(val)) {
                handler(...val);
            }
            else {
                handler(val);
            }
        });
        this.registerSubscription(name, handler, subscription);
    }
    once(name, handler) {
        let onceHandler = (value) => {
            this.off(name, onceHandler);
            handler(value);
        };
        return this.on(name, onceHandler);
    }
    removeListener(name, handler) {
        return this.off(name, handler);
    }
    registerSubscription(name, handler, sub) {
        let handlerMap = this.subscriptions.get(name);
        if (!handlerMap) {
            handlerMap = new Map();
            this.subscriptions.set(name, handlerMap);
        }
        let subArr = handlerMap.get(handler);
        if (!subArr) {
            subArr = [];
            handlerMap.set(handler, subArr);
        }
        subArr.push(sub);
    }
    getSubscriptions(name, handler) {
        let handlerMap = this.subscriptions.get(name);
        if (!handlerMap) {
            return [];
        }
        return handlerMap.get(handler) || [];
    }
    getSubject(fnName) {
        let subject = this.subjects.get(fnName);
        if (!subject) {
            subject = new Subject();
            this.subjects.set(fnName, subject);
        }
        return subject;
    }
}
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