var actions = require("./actions.js");
var AppDispatcher = require("./dispatcher.js").AppDispatcher;

function Connection(url) {
    if (url[0] === "/") {
        url = location.origin.replace("http", "ws") + url;
    }

    var ws = new WebSocket(url);
    ws.onopen = function () {
        actions.ConnectionActions.open();
    };
    ws.onmessage = function (message) {
        var m = JSON.parse(message.data);
        AppDispatcher.dispatchServerAction(m);
    };
    ws.onerror = function () {
        actions.ConnectionActions.error();
        actions.EventLogActions.add_event("WebSocket connection error.");
    };
    ws.onclose = function () {
        actions.ConnectionActions.close();
        actions.EventLogActions.add_event("WebSocket connection closed.");
    };
    return ws;
}

module.exports = Connection;