@ayanaware/bento/build/entities/EntityEvents.js

Modular runtime framework designed to solve complex tasks

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.EntityEvents = void 0;
const errors_1 = require("@ayanaware/errors");
class EntityEvents {
    constructor(name, options) {
        this.subject = new Map();
        this.subCount = 0;
        this.subscriptions = new Map();
        this.name = name;
        this.options = options;
        // create new emitter
        this.emitter = this.options.eventEmitter();
        // prevent throwing of 'error' events
        this.emitter.addListener('error', () => { });
    }
    /**
     * Emit Event
     * @param name Event name
     * @param args Event args
     */
    emit(name, ...args) {
        this.emitter.emit(name, ...args);
    }
    /**
     * Emit Event and store as subject
     * @param name Event name
     * @param args Event args
     */
    emitSubject(name, ...args) {
        this.subject.set(name, args);
        this.emit(name, ...args);
    }
    /**
     * Purges subject data for event
     * @param name Event name
     */
    purgeSubject(name) {
        this.subject.delete(name);
    }
    subscribe(name, handler, context) {
        const id = this.subCount++;
        // rewrap handler, if context provided
        if (context)
            handler = handler.bind(context);
        // if there is subject data for this event, call now
        if (this.subject.has(name)) {
            try {
                handler.call(context, this.subject.get(name));
            }
            catch (e) {
                throw new errors_1.ProcessingError(`Failed to call subject handler for "${name}"`).setCause(e);
            }
        }
        // add handler to emitter
        this.emitter.addListener(name, handler);
        this.subscriptions.set(id, { name, handler });
        return id;
    }
    unsubscribe(id) {
        if (typeof id !== 'undefined') {
            if (typeof id !== 'number')
                throw new errors_1.IllegalArgumentError('If given an argument, it must be number');
            const subscription = this.subscriptions.get(id);
            if (!subscription)
                return;
            this.emitter.removeListener(subscription.name, subscription.handler);
            this.subscriptions.delete(id);
        }
        else {
            // called with no id, remove all subscriptions
            for (const [subId, subscription] of this.subscriptions.entries()) {
                this.emitter.removeListener(subscription.name, subscription.handler);
                this.subscriptions.delete(subId);
            }
        }
    }
}
exports.EntityEvents = EntityEvents;
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