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function initGui(roomname) {
$("#nojs").remove();
var dialogoverlay = $("<div/>").prop("id", "dialogoverlay")
.append($("<div/>").prop("id", "dialoginner")
.append($("<h2/>"))
.append($("<div/>")
.append($("<p/>"))
.append($("<input/>"))
.append($("<div/>").addClass("buttons")))).hide();
var h1 = $("<h1/>").text("Chatroom ").append($("<span/>").css("font-style", "italic").text(roomname));
var chatlog = $("<div/>").prop("id", "chatlogwrap").append($("<ul/>").prop("id", "chatlog"));
var buddiescontainer = $("<section/>").prop("id", "buddiescontainer")
.append($("<h2/>").text("Buddies online"))
.append($("<ul/>").prop("id", "buddies"));
var chatinput = $("<section/>").prop("id", "chatinput")
.append($("<input/>").prop("name", "chattext").prop("id", "chattext").prop("type", "text").prop("placeholder", "Type to chat..."))
.append($("<button/>").prop("id", "sendbtn").text("Send"));
$("body").append(dialogoverlay);
$("#mainwrap")
.append(h1)
.append(chatlog)
.append(buddiescontainer)
.append(chatinput);
}
function mydialog(title, text, input, buttons) {
$("#dialoginner h2").text(title);
$("#dialoginner p").text(text);
var callcallback;
if(input === null) {
$("#dialoginner input").hide();
callcallback = function(cb) {cb();};
} else {
$("#dialoginner input").prop("placeholder", input).show();
callcallback = function(cb) {cb($("#dialoginner input").val());};
}
$("#dialoginner .buttons > *").remove();
var btncontainer = $("#dialoginner .buttons");
for(var i in buttons) {
var button = buttons[i];
btncontainer.append($("<button/>").text(button.text).click(function() {
$("#dialogoverlay").hide();
callcallback(button.callback);
}));
}
$("#dialogoverlay").show();
}
function randomColor() {
var h = Math.floor(Math.random() * 360);
var s = Math.floor((Math.random() * 0.5 + 0.5)*100);
var l = Math.floor((Math.random() * 0.4 + 0.3)*100);
return "hsl("+h+", "+s+"%, "+l+"%)";
}
function askTryAgain(reason, ws_url) {
mydialog(
"Could not join",
"Could not Join chat (Reason: "+reason+")",
null,
[{
"text": "Try again",
"callback": (function() {
pickUsername(ws_url);
})
}]
);
}
var buddyColors = {};
function addBuddy(nick) {
var found = false;
$("#buddies li").each(function(index) {
if($(this).text() == nick) {
found = true;
}
});
if(!found) {
var col = randomColor();
buddyColors[nick] = col;
$("#buddies").append($("<li/>").css("color", col).text(nick));
}
}
function removeBuddy(nick) {
$("#buddies li").each(function(index) {
var self = $(this);
if(self.text() == nick) {
self.remove();
}
});
}
function chatlogWriter(event) {
var data = JSON.parse(event.data);
var msgtext = "";
switch(data.type) {
case "chat":
msgtext = data.text;
break;
case "join":
msgtext = "joined the room";
addBuddy(data.user);
break;
case "leave":
msgtext = "left the room";
removeBuddy(data.user);
break;
}
var elemNick = $("<span/>").addClass("nick").css("color", buddyColors[data.user]).text(data.user);
var elemText = $("<span/>").addClass("msg").text(msgtext);
var logentry = $("<li/>").addClass(data.type).append(elemNick).append(elemText);
$("#chatlog").append(logentry);
logentry.get()[0].scrollIntoView();
}
function initChatSender(ws) {
var send = function() {
var ct = $("#chattext")
ws.send(ct.val());
ct.val("");
ct.focus();
};
$("#sendbtn").click(send);
$("#chattext").keyup(function(event) {
if(event.keyCode==13) {
send();
}
});
}
function Join(ws_url, nick) {
var ws = new WebSocket(ws_url, "chat");
ws.onopen = function(_) {
ws.send(nick);
ws.onmessage = function(event) {
var data = JSON.parse(event.data);
if(data.ok) {
$("#chatinput").show();
ws.onmessage = chatlogWriter;
for(var i in data.buddies) {
addBuddy(data.buddies[i]);
}
initChatSender(ws);
ws.onclose = function(_) {
mydialog("Connection lost", "Connection to server lost. Try refreshing the page", null, []);
};
} else {
ws.close();
askTryAgain(data.error, ws_url);
}
};
};
}
function RunChat(ws_url, roomname) {
initGui(roomname);
pickUsername(ws_url);
}
function pickUsername(ws_url) {
mydialog(
"Pick a username",
"Pick a username to join the chat",
"username",
[{
"text": "OK",
"callback": (function(nick) {Join(ws_url, nick);})
}]
);
}
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