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var magic = 'xyzzy';
function historyUp()
{
if (this.cursor >= 0)
{
this.cursor--;
}
}
function historyDown()
{
if (this.cursor < this.items.length)
{
this.cursor++;
}
}
function historyCurr()
{
if (this.cursor < 0 || this.cursor >= this.items.length)
{
return "";
}
return this.items[this.cursor];
}
function historyAdd(text)
{
this.items[this.items.length] = text;
this.cursor = this.items.length;
}
function historyShow()
{
var res = "";
if (this.cursor == -1)
{
res += "[]";
}
for (var i = 0; i < this.items.length; i++)
{
if (i == this.cursor)
{
res += "["
}
res += this.items[i].toString();
if (i == this.cursor)
{
res += "]"
}
res += " "
}
if (this.cursor == this.items.length)
{
res += "[]";
}
return res;
}
function History()
{
this.items = new Array();
this.cursor = -1;
this.up = historyUp;
this.down = historyDown;
this.curr = historyCurr;
this.add = historyAdd;
this.show = historyShow;
}
var hist = new History();
function make_post_body(args)
{
var qs = '';
for (key in args)
{
vals = args[key];
// vals can be an array, to make multiple args with the same name
// To handle this, make non-array objects into an array, then loop
if (!(vals instanceof Array))
vals = [vals];
var i;
for (i=0; i<vals.length; i++)
{
if (i > 0)
{
qs += "&";
}
qs += encodeURIComponent(key) + "=" + encodeURIComponent(vals[i]);
}
}
return qs;
}
function enter_line()
{
var inp = document.getElementById('inputText');
var digest = hex_md5(inp.value + magic);
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST", "chat", false);
xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlhttp.send(make_post_body({"digest":digest, "text":inp.value}))
var res = JSON.parse(xmlhttp.responseText);
var output = document.getElementById("output");
{
var pre = document.createElement("pre");
pre.setAttribute("class", "inputMsg");
pre.appendChild(document.createTextNode(inp.value + "\n"));
output.appendChild(pre);
}
if (res.hasOwnProperty('okay'))
{
// Success!
// print out the output (res.okay[0])
var pre = document.createElement("pre");
pre.setAttribute("class", "outputMsg");
pre.appendChild(document.createTextNode(res.okay[0]));
output.appendChild(pre);
// print out the return value (res.okay[1])
if (res.okay[1])
{
var pre = document.createElement("pre");
pre.setAttribute("class", "outputMsg");
pre.appendChild(document.createTextNode(res.okay[1] + "\n"));
output.appendChild(pre);
}
// set the prompt to >>>
var prompt = document.getElementById("prompt");
prompt.replaceChild(document.createTextNode(">>> "), prompt.firstChild);
}
else if (res.hasOwnProperty('exc'))
{
// Failure!
// print out the error message (res.exc)
var pre = document.createElement("pre");
pre.setAttribute("class", "errorMsg");
pre.appendChild(document.createTextNode(res.exc));
output.appendChild(pre);
}
else if (res.hasOwnProperty('more'))
{
// Need more input, so set the prompt to ...
var prompt = document.getElementById("prompt");
prompt.replaceChild(document.createTextNode("... "), prompt.firstChild);
}
else {
// assert res.hasOwnProperty('input')
var prompt = document.getElementById("prompt");
prompt.replaceChild(document.createTextNode("+++ "), prompt.firstChild);
}
}
function catch_input(key)
{
var inp = document.getElementById('inputText');
if (key == 13)
{
enter_line();
hist.add(inp.value);
inp.value = hist.curr();
}
if (key == 38)
{
hist.up();
inp.value = hist.curr();
}
if (key == 40)
{
hist.down();
inp.value = hist.curr();
}
}
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