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gargoyle.js
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gargoyle.js
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//
// JavaScript code file for Gargoyle
//
var WELCOME = 'Welcome';
var GRANTED = ['Granted1', 'Granted2', 'Granted3', 'Granted4', 'Granted5'];
var DENIED = ['Denied1', 'Denied2', 'Denied3', 'Denied4', 'Denied5', 'Denied6'];
var AUDIO_TYPES = {'audio/mpeg': 'mp3', 'audio/ogg': 'ogg'};
var BACKSPACE = 8;
var ENTER = 13;
var ESCAPE = 27;
var CONTROL_KEYS = [BACKSPACE, ENTER, ESCAPE];
var DT = 100;
var QUESTION_TIMEOUT = 60 * 1000; // 1 minute
function debug(message) {
var date = new Date().toTimeString().split(' ')[0];
logger.innerHTML += date + ' ' + message + '<br>';
logger.scrollTop = logger.scrollHeight;
if (console) {
console.log(date + ' ' + message);
}
}
function createL2CMap() {
var lat = 'qwertyuiopasdfghjklzxcvbnm';
var cyr = 'йцукенгшщзфывапролдячсмить';
var s1 = '[];\',.`ё';
var s2 = '{}:"<>~Ё';
var sc = 'хъжэбюее';
var map = {};
for (var i in lat) {
map[lat[i].charCodeAt(0)] = cyr[i];
map[lat[i].toUpperCase().charCodeAt(0)] = cyr[i];
}
for (var i in sc) {
map[s1[i].charCodeAt(0)] = sc[i];
map[s2[i].charCodeAt(0)] = sc[i];
}
return map;
}
function createProperKeyCodes() {
ret = CONTROL_KEYS.concat([59 /*ж*/, 186 /*ж*/, 188 /*б*/, 190 /*ю*/, 192 /*ё*/, 219 /*х*/, 221 /*ъ*/, 222 /*э*/]);
for (var i = 65; i <= 90; i++) {
ret.push(i);
}
return ret;
}
function show(block) {
block.className = 'visible';
}
function hide(block) {
block.className = 'invisible';
}
function prevent(e) {
e = e || window.event;
if (e) {
if (e.preventDefault !== undefined) {
e.preventDefault();
}
if (e.stopPropagation !== undefined) {
e.stopPropagation();
}
if (e.returnValue !== undefined) {
e.returnValue = false;
}
}
return false;
}
function focus(e) {
question.focus();
resetQuestionTimeout(true);
return prevent(e);
}
function delay(what) {
return setTimeout(what, DT);
}
function resetQuestionTimeout(reset) {
clearTimeout(questionTimeout);
questionTimeout = reset ? setTimeout(idle, QUESTION_TIMEOUT) : null;
}
function createAudio(name) {
var audio = document.createElement('audio');
audio.src = 'audio/' + name + '.' + audioType;
if (isDesktopBrowser) {
audio.volume = 0;
audio.play();
} else { // can't control volume on mobiles
audio.load();
}
return audio;
}
function playAudio(audio, what, volume) {
if (audio) {
audio.pause();
audio.currentTime = 0;
audio.volume = volume ? volume : 1;
audio.play();
audio.addEventListener('ended', what, false);
} else {
what();
}
}
function main() {
// HTML references
body = document.getElementsByTagName('body')[0];
body.removeAttribute('onload'); // don't even try to work after saving modified page
startupBlock = document.getElementById('startupBlockID');
loadingProgress = document.getElementById('loadingProgressID');
logger = document.getElementById('loggerID');
workingBlock = document.getElementById('workingBlockID');
questionBlock = document.getElementById('questionBlockID');
question = document.getElementById('questionID');
// Setting up audio
isDesktopBrowser = navigator.userAgent.search(/(ipad)|(iphone)|(ipod)|(android)|(webos)|(mobi)|(mini)/i) < 0;
properlyLoaded = HTMLMediaElement.HAVE_CURRENT_DATA; // (!isDesktopBrowser && window.opera) ? HTMLMediaElement.HAVE_CURRENT_DATA : HTMLMediaElement.HAVE_ENOUGH_DATA;
audioType = null;
var audio = document.createElement('audio');
for (var type in AUDIO_TYPES) {
if (audio.canPlayType(type)) {
audioType = AUDIO_TYPES[type];
break;
}
}
if (audioType) {
debug('Supported audio: ' + audioType.toUpperCase());
} else {
debug('Audio not supported, aborting');
return;
}
// Loading riddles
welcome = createAudio(WELCOME);
medias = [[welcome]];
granted = [];
for (var i = 0, g; g = GRANTED[i++];) {
var a = createAudio(g);
granted.push(a);
medias.push([a]);
}
denied = [];
for (var i = 0, g; g = DENIED[i++];) {
var a = createAudio(g);
denied.push(a);
medias.push([a]);
}
for (var i = 0, riddle; riddle = RIDDLES[i++];) {
riddle[0] = createAudio(riddle[0]);
var answers = riddle[1] = riddle[1].split(' ');
var maxLength = 0;
for (var j in answers) {
answers[j] = answers[j].toLowerCase().trim();
maxLength = Math.max(maxLength, answers[j].length);
}
riddle.push(maxLength);
medias.push(riddle);
}
// Wait for audio to load
errors = 0;
delay(waitForMedia);
}
function waitForMedia(media) {
var ready = true;
var loadedMedia = 0;
var totalMedia = 0;
for (var i = 0, riddle; riddle = medias[i++];) {
totalMedia++;
var audio = riddle[0];
if (audio && audio.readyState < properlyLoaded) {
ready = false;
if (audio.error) {
debug('ERROR loading audio from ' + audio.src);
errors++;
riddle[0] = null;
}
} else {
loadedMedia++;
}
}
if (totalMedia) {
loadingProgress.innerHTML = 'Gargoyle loading audio... ' + loadedMedia + ' of ' + totalMedia + ' (' + Math.round(loadedMedia * 100 / totalMedia) + '%' + ')';
}
if (ready) {
// Complete the application startup
if (errors === totalMedia) {
debug('No audio loaded successfully, aborting');
return;
}
if (errors) {
startupBlock.onmousedown = start;
debug(errors + ' errors found, click to continue');
} else {
setTimeout(start, 200); // needs to be investigated
}
} else {
delay(waitForMedia);
}
}
function start(e) {
busy = null;
answers = null;
questionTimeout = null;
riddles = [];
welcome = medias[0][0];
granted = [];
for (var i = 0; i < GRANTED.length; i++) {
var m = medias[i + 1][0];
if (m) {
granted.push(m);
}
}
denied = [];
for (var i = 0; i < DENIED.length; i++) {
var m = medias[i + 1 + GRANTED.length][0];
if (m) {
denied.push(m);
}
}
question.onmousedown = focus;
question.onmouseup = focus;
question.onkeydown = keyDownHandler;
question.onkeypress = keyPressHandler;
workingBlock.tabIndex = 0; // to enable keypress
latinToCyrillic = createL2CMap();
properKeyCodes = createProperKeyCodes();
hide(startupBlock);
show(workingBlock);
playAudio(welcome, idle);
workingBlock.onkeydown = tap;
body.oncontextmenu = prevent;
return prevent(e);
}
function idle(e) {
resetQuestionTimeout();
hide(questionBlock);
busy = false;
workingBlock.onmousedown = tap;
workingBlock.focus();
return prevent(e);
}
function tap(e) {
e = e || window.event;
if (e && (e.altKey || e.ctrlKey || e.metaKey)) {
return prevent(e);
}
if (busy) {
return true;
}
busy = true;
if (!answers) { // change riddle if it was answered
if (!riddles.length) {
for (var i = 0, riddle; riddle = RIDDLES[i++];) {
if (riddle[0]) {
riddles.push(riddle);
}
}
}
var riddle = riddles.splice(Math.floor(Math.random() * riddles.length), 1)[0];
audio = riddle[0];
answers = riddle[1];
maxAnswerLength = riddle[2];
}
playAudio(audio, ask);
return true;
}
function ask() {
question.maxLength = maxAnswerLength;
question.value = '';
show(questionBlock);
focus();
workingBlock.onmousedown = focus;
}
function keyDownHandler(e) {
resetQuestionTimeout(true);
e = e || window.event;
var keyCode = e.keyCode;
if (properKeyCodes.indexOf(keyCode) < 0 || e.ctrlKey || e.altKey || e.metaKey) {
return prevent(e);
}
if (CONTROL_KEYS.indexOf(keyCode) >= 0) {
if (!e.shiftKey) {
switch(e.keyCode) {
case BACKSPACE:
question.value = question.value.substring(0, question.value.length - 1);
break;
case ENTER: // submit
resetQuestionTimeout();
workingBlock.focus();
hide(questionBlock);
if (answers.indexOf(question.value.toLowerCase()) >= 0) {
answers = null;
playAudio(granted[Math.floor(Math.random() * granted.length)], idle);
} else if (question.value) {
playAudio(denied[Math.floor(Math.random() * denied.length)], idle);
} else {
delay(idle); // avoid repeated keypress
}
break;
case ESCAPE:
delay(idle); // avoid repeated keypress
break;
}
}
return prevent(e);
}
return true;
}
function keyPressHandler(e) {
e = e || window.event;
if (!e.altKey && !e.ctrlKey && !e.metaKey) {
if (question.value.length < question.maxLength) {
if (e.charCode >= 'А'.charCodeAt(0) && e.charCode <= 'я'.charCodeAt(0)) {
question.value += String.fromCharCode(e.charCode);
} else if (c = latinToCyrillic[e.charCode]) {
question.value += c; // map latins to cyrillic
}
}
}
return prevent(e);
}