// defines:
// variable ws (the websocket)
// variable wsReady (boolean)
// wsSend(msg) (send a message when websocket is ready)
sclass HInitWebSocket {
  S wsVar = "ws";
  S onOpen;
  S onMessage;
  S readyMsg = "WebSocket ready!";
  
  S headStuff aka get() {
    ret hreconnectingWebSockets() + hscript([[
      var wsReady = false;
      var wsInitialMsgs = [];
      var wsVerbose = false;
      var ]] + wsVar + [[ = new ReconnectingWebSocket(((window.location.protocol === "https:") ? "wss://" : "ws://") + window.location.host + "/");
      
      ]] + wsVar + [[.onopen = function(event) {
        wsReady = true;
        console.log(]] + jsQuote(readyMsg) + [[);
        wsInitialMsgs.forEach(function(msg) {
          if (wsVerbose) console.log("Sending initial msg: " + msg);
          ws.send(msg);
        });
        wsInitialMsgs = [];
        ]] + jsDropTrailingComments(onOpen) + [[ };
        
      ]] + wsVar + [[.onmessage = function(event) {
        ]] + unnull(onMessage) + [[
      };
      
      // send it now if ws is open already or when ws was opened
      function wsSend(msg) {
        if (wsReady) {
        wsInitialMsgs.push(msg);
          if (wsVerbose) console.log("Sending initial msg: " + msg);
          ws.send(msg);
        }
      }
    ]]);
  }
}