const socket = new class {
    constructor() {
        this.socketURI = '';
        this.connect();
    }

    connect() {
        this.ws = new WebSocket(this.socketURI);

        this.ws.onopen = event => this.onopen(event);
        this.ws.onclose = event => this.onclose(event);
        this.ws.onerror = event => this.onerror(event);
        this.ws.onmessage = event => this.onmessage(event);
    }

    onmessage(ev) {
        const data = JSON.parse(ev.data);

        switch(data.event) {
            // handle
        }
    }

    onopen() {
        console.log('Socket connected');
    }

    onclose() {
        console.log('Socket closed');
        setTimeout(() => this.connect(), 2000);
    }

    onerror(error) {
        console.log('Socket error: ', error);
    }
};