MC Dynmap Chat Log

var frozenIceWrapper = function(){

    this.run = function() {
        console.log("ok");
        if (!this.supports_html5_storage()) {
            alert('Der Browser unterschtützt diese Technologie nicht!');
        } else {
            console.log("ok2");
            this.insertButtons();
            this.bindToChat();
        }

    };


    this.supports_html5_storage = function() { //http://stackoverflow.com/questions/17956343/can-you-save-load-a-file-via-javascript
     try
      {
        return 'localStorage' in window && window['localStorage'] !== null;
      }
      catch (e)
      {
        return false;
      }
    }

    this.bindToChat = function() {
        var saveToLog = this.saveToLog;
        $('.messagelist').bind('DOMNodeInserted', function(event) {
        var targetNode = event.target;
        var messagerow = targetNode.getElementsByClassName('messagerow');
        var textNodes = targetNode.getElementsByClassName('messagetext');

        var playerName = null;
        var message = "";

        for (node in textNodes) {
            //console.log(node + ": " + textNodes[node].innerHTML);

            if (node.substring(0,4) == "ms__") {
                console.log(node + ": " + textNodes[node].innerHTML);
                if (playerName == null) {
                    playerName = textNodes[node].innerHTML;
                } else {
                    message += textNodes[node].innerHTML + " ";
                }

            }

        }

        if (playerName != null) {
            var today = new Date();
            console.log("(" + today.getHours() + ":" + today.getMinutes() + ") " + playerName + "  " + message);
            saveToLog("(" + today.getHours() + ":" + today.getMinutes() + ") " + playerName + "  " + message + "<br>");
        }
        });
    };


    this.saveToLog = function(text) {
        var myDataString = localStorage.getItem("chatLogFrozen");
        if (myDataString == null) {myDataString = "";}
        myDataString += "\n" + text;
        localStorage.setItem("chatLogFrozen", myDataString);
    };

    this.clearLog = function() {
        if (confirm("Wollen sie den ChatLog löschen?")) {
            localStorage.removeItem("chatLogFrozen");
        }
    };

    this.downloadLog = function() {
        var temp = window.open('about:blank', 'example', '');
        var div = temp.document.createElement("div");
        div.innerHTML = "Logs<br>" + localStorage.getItem("chatLogFrozen");
        temp.document.body.appendChild( div );
    };

    this.insertButtons = function() {
        var divs = document.getElementsByClassName('dynmap-link leaflet-control');
        var div = divs[0];
        var divDownload = document.createElement("a");
        var divDelete = document.createElement("a");
        //divDownload.className = "dynmap-link-button";
        divDownload.title="Download Chat Log";
        divDownload.innerHTML = "Download";

        divDelete.title = "Delete Chat Log";
        divDelete.innerHTML = "Delete";

        div.appendChild(divDownload);
        div.appendChild(divDelete);


        divDownload.addEventListener("click", this.downloadLog);
        divDelete.addEventListener("click", this.clearLog);

    };

}


var chatLog = new frozenIceWrapper();
chatLog.run();