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document.addEventListener('DOMContentLoaded', () => {
/**
* Handling for sending commands to server.
*/
window.qip = false; // query in prograss flag.
function query(q) {
if (window.qip) {
return window.setTimeout(query, 10, q)
}
window.qip = true;
var qipoff = function() {
window.qip = false;
}
var spit = function(response) {
var gdg = 'Oops! getting gobbledygook from server';
var r;
try {
r = JSON.parse(response)
} catch (e) {
return barfslow(gdg, 'error', qipoff);
}
if (!(typeof r === 'object')) {
return barf(gdg);
}
if (!('ans' in r)) {
return barfslow(
'No answer from server!',
'error',
qipoff
)
}
return barfslow(r.ans, 'concierge', qipoff)
}
var xhr = new XMLHttpRequest()
xhr.open('POST', '/io/query', true)
xhr.onreadystatechange = function() {
if (this.readyState != 4) {
return;
}
if (this.status == 200) {
return spit(this.responseText)
} else {
return barfslow(
'Unable send command to server!', 'error', qipoff
)
}
}
xhr.send(q)
}
/**
* Handling for console.
*/
function barf(txt, type, p) {
if (txt.length < 1) {
return ''
}
barfblank()
p = document.createElement('p')
p.className = type
p.append(txt)
ioconsole.appendChild(p)
return ''
}
function barfblank() {
p = document.createElement('p')
p.className = 'blank'
p.innerHTML = '<br />'
ioconsole.appendChild(p)
}
function barfslow(txt, type, cb, p) {
if (txt.length < 1) {
if (cb)
cb()
return ''
}
nl = false
if (txt.charAt(0) == '\n')
nl = true
if (!p)
barfblank()
if (!p || nl) {
p = document.createElement('p')
p.className = type
ioconsole.appendChild(p)
}
p.append(txt.substring(0, 1))
p.scrollIntoView();
window.setTimeout(
barfslow, 0,
txt.substring(1, txt.length),
type,
cb,
p
)
return ''
}
var ioconsole = document.getElementsByClassName('console')[0]
/**
* Handling for the prompt.
*/
function submit(e) {
e.preventDefault()
var input = e.target.querySelector('input')
var cmd = input.value
if (cmd.length < 1)
return
/**
* Reset prompt.
*/
input.value = ''
/**
* Send command to server.
*/
query(cmd)
}
var form = document.querySelector('form')
form.onsubmit = submit
});
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