scryfall-sdk/out/util/EventEmitter.js

A Node.js SDK for https://scryfall.com/docs/api written in Typescript.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const EMPTY = [];
class EventEmitter {
    constructor() {
        this._maxListeners = 10;
        this._listeners = {};
    }
    addListener(eventName, listener) {
        var _a;
        var _b;
        const listeners = (_a = (_b = this._listeners)[eventName]) !== null && _a !== void 0 ? _a : (_b[eventName] = []);
        listeners.push(listener);
        if (listeners.length > this._maxListeners)
            console.warn(`MaxListenersExceededWarning: Possible EventEmitter memory leak detected. ${listeners.length} ${eventName.toString()} listeners added. Use emitter.setMaxListeners() to increase limit`);
        return this;
    }
    prependListener(eventName, listener) {
        var _a;
        var _b;
        const listeners = (_a = (_b = this._listeners)[eventName]) !== null && _a !== void 0 ? _a : (_b[eventName] = []);
        listeners.unshift(listener);
        if (listeners.length > this._maxListeners)
            console.warn(`MaxListenersExceededWarning: Possible EventEmitter memory leak detected. ${listeners.length} ${eventName.toString()} listeners added. Use emitter.setMaxListeners() to increase limit`);
        return this;
    }
    removeListener(eventName, listener) {
        const listeners = this._listeners[eventName];
        if (listeners) {
            const index = listeners.indexOf(listener);
            if (index >= 0) {
                if (listeners.length === 1)
                    delete this._listeners[eventName];
                else
                    listeners.splice(index, 1);
            }
        }
        return this;
    }
    on(eventName, listener) {
        this.addListener(eventName, listener);
        return this;
    }
    once(eventName, listener) {
        const realListener = (...args) => {
            this.removeListener(eventName, realListener);
            listener(...args);
        };
        this.addListener(eventName, realListener);
        return this;
    }
    prependOnceListener(eventName, listener) {
        const realListener = (...args) => {
            this.removeListener(eventName, realListener);
            listener(...args);
        };
        this.prependListener(eventName, realListener);
        return this;
    }
    off(eventName, listener) {
        this.removeListener(eventName, listener);
        return this;
    }
    removeAllListeners(event) {
        if (event !== undefined)
            delete this._listeners[event];
        return this;
    }
    emit(eventName, ...args) {
        if (this._listeners[eventName])
            for (const listener of this._listeners[eventName])
                listener(...args);
        return true;
    }
    setMaxListeners(n) {
        this._maxListeners = n;
        return this;
    }
    getMaxListeners() {
        return this._maxListeners;
    }
    listeners(eventName) {
        const listeners = this._listeners[eventName];
        return listeners ? [...listeners] : EMPTY;
    }
    rawListeners(eventName) {
        throw new Error("The rawListeners method is not available using this polyfill");
    }
    listenerCount(eventName) {
        var _a, _b;
        return (_b = (_a = this._listeners[eventName]) === null || _a === void 0 ? void 0 : _a.length) !== null && _b !== void 0 ? _b : 0;
    }
    eventNames() {
        return Object.keys(this._listeners);
    }
}
exports.default = EventEmitter;