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client.js
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client.js
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(function($) {
var title = document.title,
colors = ["green", "orange", "yellow", "red", "fuschia", "blue"],
channel = nodeChat.connect("/chat"),
scroll = true,
log,
message;
// TODO: Turn off auto scrolling if user has scrolled up from the bottom
// TODO: handle connectionerror
$(function() {
log = $("#chat-log");
message = $("#message");
// Add a button that can be easily styled
$("<a></a>", {
id: "submit",
text: "Send",
href: "#",
click: function(event) {
event.preventDefault();
$(this).closest("form").submit();
}
})
.appendTo("#entry fieldset");
// Add a message indicator when a nickname is clicked
$("#users").delegate("li", "click", function() {
message
.val($(this).text() + ": " + message.val())
.focus();
});
});
// new message posted to channel
// - add to the chat log
$(channel).bind("msg", function(event, message) {
var time = formatTime(message.timestamp),
row = $("<div></div>")
.addClass("chat-msg");
$("<span></span>")
.addClass("chat-time")
.text(time)
.appendTo(row);
$("<span></span>")
.addClass("chat-nick")
.text(message.nick)
.appendTo(row);
$("<span></span>")
.addClass("chat-text")
.text(message.text)
.appendTo(row);
row.appendTo(log);
})
// another user joined the channel
// - add to the chat log
.bind("join", function(event, message) {
var time = formatTime(message.timestamp),
row = $("<div></div>")
.addClass("chat-msg chat-system-msg");
$("<span></span>")
.addClass("chat-time")
.text(time)
.appendTo(row);
$("<span></span>")
.addClass("chat-nick")
.text(message.nick)
.appendTo(row);
$("<span></span>")
.addClass("chat-text")
.text("joined the room")
.appendTo(row);
row.appendTo(log);
})
// another user joined the channel
// - add to the user list
.bind("join", function(event, message) {
var added = false,
nick = $("<li></li>", {
"class": colors[0],
text: message.nick
});
colors.push(colors.shift());
$("#users > li").each(function() {
if (message.nick == this.innerHTML) {
added = true;
return false;
}
if (message.nick < this.innerHTML) {
added = true;
nick.insertBefore(this);
return false;
}
});
if (!added) {
$("#users").append(nick);
}
})
// another user left the channel
// - add to the chat log
.bind("part", function(event, message) {
var time = formatTime(message.timestamp),
row = $("<div></div>")
.addClass("chat-msg chat-system-msg");
$("<span></span>")
.addClass("chat-time")
.text(time)
.appendTo(row);
$("<span></span>")
.addClass("chat-nick")
.text(message.nick)
.appendTo(row);
$("<span></span>")
.addClass("chat-text")
.text("left the room")
.appendTo(row);
row.appendTo(log);
})
// another user left the channel
// - remove from the user list
.bind("part", function(event, message) {
$("#users > li").each(function() {
if (this.innerHTML == message.nick) {
$(this).remove();
return false;
}
});
})
// Auto scroll list to bottom
.bind("join part msg", function(){
window.setTimeout(function() {
log.scrollTop(log[0].scrollHeight);
}, 10);
});
// handle login (choosing a nick)
$(function() {
function loginError(error) {
login
.unbind("ajaxSuccess.login")
.addClass("error")
.find("label")
.text(error + " Please choose another:")
.end()
.find("input")
.focus();
}
var login = $("#login");
login.submit(function() {
var nick = $.trim($("#nick").val());
if (!nick.length || /[^\w_\-^!]/.exec(nick)) {
loginError("Invalid Nickname.");
return false;
}
channel.join(nick, {
success: function() {
$("body")
.removeClass("login")
.addClass("channel");
message.focus();
},
error: function() {
loginError("Nickname in use.");
}
});
return false;
});
login.find("input").focus();
});
// handle sending a message
$(function() {
$("#channel form").submit(function() {
channel.send(message.val());
message.val("").focus();
return false;
});
});
// update the page title to show if there are unread messages
$(function() {
var focused = true,
unread = 0;
$(window)
.blur(function() {
focused = false;
})
.focus(function() {
focused = true;
document.title = title;
});
$(channel).bind("msg", function(event, message) {
if (!focused) {
unread++;
document.title = "(" + unread + ") " + title;
}
});
});
// notify the chat server that we're leaving if we close the window
$(window).unload(function() {
channel.part();
});
function formatTime(timestamp) {
var date = new Date(timestamp),
hours = date.getHours(),
minutes = date.getMinutes(),
ampm = "AM";
if (hours > 12) {
hours -= 12;
ampm = "PM";
}
if (minutes < 10) {
minutes = "0" + minutes;
}
return hours + ":" + minutes + " " + ampm;
}
})(jQuery);