@drift-labs/common/lib/utils/StrictEventEmitter.js

Common functions for Drift

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.StrictEventEmitter = void 0;
class StrictEventEmitter {
    constructor() {
        this.listeners = {};
    }
    on(event, listener) {
        if (!this.listeners[event]) {
            this.listeners[event] = [];
        }
        this.listeners[event].push(listener);
    }
    off(event, listener) {
        const eventListeners = this.listeners[event];
        if (!eventListeners)
            return;
        const index = eventListeners.indexOf(listener);
        if (index > -1) {
            eventListeners.splice(index, 1);
        }
        if (eventListeners.length === 0) {
            delete this.listeners[event];
        }
    }
    once(event, listener) {
        const onceWrapper = (params) => {
            listener(params);
            this.off(event, onceWrapper);
        };
        this.on(event, onceWrapper);
    }
    emit(event, params) {
        const eventListeners = this.listeners[event];
        if (!eventListeners)
            return;
        eventListeners.forEach((listener) => {
            listener(params);
        });
    }
    removeAllListeners(event) {
        if (event) {
            delete this.listeners[event];
        }
        else {
            this.listeners = {};
        }
    }
    listenerCount(event) {
        const eventListeners = this.listeners[event];
        return eventListeners ? eventListeners.length : 0;
    }
}
exports.StrictEventEmitter = StrictEventEmitter;
//# sourceMappingURL=StrictEventEmitter.js.map