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background.js
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background.js
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var csrf = "";
var oauth = "";
var port = 4370;
var currentTrack = "";
var currentPosition;
var accessCode = "";
var playlistId = "";
var spotifyId = "";
var errorMessage = "";
var refreshed = false;
var refreshThreshold = 75;
var openedOnce = false;
var off = true;
var updateIntervalSeconds = 3;
var updateStatusInitialDelaySeconds = 10;
var volume = 0;
var shuffle = false;
var playing = false;
var repeat = false;
var installed = false;
var skipThresholdMultiplier = 1.05;
var maxPartTimeHours = 4;
var maxPartyTimeSeconds = maxPartTimeHours * 60 * 60;
var timeRunningSeconds = 0;
var playingPositionGlobal = 0;
var lengthGlobal = 0;
chrome.webRequest.onBeforeSendHeaders.addListener(
function(details) {
details.requestHeaders.push({name:"Origin",value:"https://embed.spotify.com"});
return {requestHeaders: details.requestHeaders};
},
{urls: ["*://*.spotilocal.com:*/*"]},
["blocking", "requestHeaders"]);
chrome.extension.onMessage.addListener(function(request, sender, sendResponse) {
switch(request.type) {
case "id":
var id = request.value;
spotifyId = id;
getAccessCode(id, true);
break;
case "login":
login();
break;
case "get-status":
var res = '<span style="opacity:.5;">connect</span>';
if (accessCode) {
res = accessCode;
}
var onoff = (off == false) ? "Turn Off Partify" : "Turn On Partify";
sendResponse({
message: res,
onoff: onoff,
boolv: off,
error: errorMessage
});
if (!accessCode) {
if (spotifyId)
getAccessCode(spotifyId, false);
}
break;
case "new-access-code":
var code = request.value;
removeTab("http://www.partify.club/party/" + accessCode);
accessCode = code;
chrome.tabs.create({url:"http://www.partify.club/party/" + accessCode,"active":false});
break;
case "toggle":
if (off == false) {
off = true;
postTrackToPlaylist(playingPositionGlobal, lengthGlobal, true);
} else {
off = false;
login();
timeRunningSeconds = 0;
errorMessage = "";
if (!installed) {
installed = true;
setTimeout(function() { updateStatus(); }, 1000 * updateStatusInitialDelaySeconds);
}
}
var onoff = (off == false) ? "Turn Off Partify" : "Turn On Partify";
sendResponse({
onoff: onoff,
boolv: off
})
break;
break;
}
return true;
});
function updateStatus() {
var timedOut = false;
if (!off) {
timeRunningSeconds = timeRunningSeconds + updateIntervalSeconds;
if (timeRunningSeconds > maxPartyTimeSeconds) {
off = true;
postTrackToPlaylist(playingPositionGlobal, lengthGlobal, true);
alert("Your party timed out. Turn on Partify to start it again.");
errorMessage = "party timed out";
timedOut = true;
}
if (navigator.onLine) {
if (!timedOut) {
if (spotifyId == undefined) {
login();
}
errorMessage = "" ;
if (csrf && oauth && accessCode && playlistId) {
getStatus();
} else if (!csrf || !oauth) {
initializeTokens();
} else if (!accessCode) {
getAccessCode(spotifyId, false);
}
}
} else {
errorMessage = "internet connection lost"
off = true;
}
}
setTimeout(function() { updateStatus() }, 1000 * updateIntervalSeconds);
}
function logTokens() {
console.log("csrf: " + csrf);
console.log("oauth: " + oauth);
}
function initializeTokens() {
getOauth();
getCsrf();
}
function updateTrackId(jsonResponse) {
var trackId = jsonResponse["track"]["track_resource"]["uri"];
if (currentTrack != trackId) {
refreshed = false;
currentTrack = trackId;
var playingPosition = jsonResponse["playing_position"];
var length = jsonResponse["track"]["length"];
postTrackToPlaylist(playingPosition, length, false);
return true;
}
return false;
}
function updateProperties(propertiesList, jsonResponse) {
var propertyChanged = false;
for (var i = 0; i < propertiesList.length; i++) {
var propertyString = propertiesList[i];
var iProperty = jsonResponse[propertyString];
propertyChanged = updateProperty(propertyString, iProperty) || propertyChanged;
}
return propertyChanged;
}
function updateProperty(propertyString, iProperty) {
var changed = false;
if (propertyString == "volume") {
if (volume != iProperty) {
volume = iProperty;
changed = true;
}
} else if (propertyString == "shuffle") {
if (shuffle != iProperty) {
shuffle = iProperty;
changed = true;
}
} else if (propertyString == "playing") {
if (playing != iProperty) {
playing = iProperty;
changed = true;
}
} else if (propertyString == "repeat") {
if (repeat != iProperty) {
repeat = iProperty;
changed = true;
}
}
return changed;
}
function postProperty(propertyString, property) {
var xmlhttp = new XMLHttpRequest();
var url = "http://partify.club/api/status"
var params = propertyString + "=" + property.toString() + "&accessCode=" + accessCode;
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
} else {
//console.log(xmlhttp.responseText);
}
}
xmlhttp.open("POST", url, true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send(params);
}
function postTrackToPlaylist(playingPosition, length, turningOff) {
var xmlhttp = new XMLHttpRequest();
url = "http://partify.club/api/currentSong";
if (turningOff) {
playing = false;
}
var params = "accessCode=" + accessCode + "&songId=" + currentTrack + "&playingPosition=" + playingPosition + "&length=" + length + "×tamp=" + Date.now() + "&playing=" + playing + "&repeat=" + repeat + "&shuffle=" + shuffle + "&volume=" + volume;
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
//console.log(xmlhttp.responseText);
//console.log("new song posted to partify");
} else if (xmlhttp.readyState == 4 && xmlhttp.status == 404) {
getAccessCode(spotifyId, false);
}
}
xmlhttp.open("POST", url, true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send(params);
}
function makeid(length) {
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
for( var i=0; i < length; i++ )
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
}
function removeTab(url) {
chrome.tabs.query({"url":url}, function(tabs) {
for (var i = 0; i < tabs.length; i++) {
chrome.tabs.remove(tabs[i].id);
}
})
}
function openTabsInitially() {
var partifyPlaylistUrl = "spotify:user:" + spotifyId + ":playlist:" + playlistId;
chrome.tabs.create({url:partifyPlaylistUrl,"active":false});
setTimeout(function() { removeTab(partifyPlaylistUrl) }, 1000);
chrome.tabs.create({url:"http://partify.club/party/" + accessCode,"active":false});
}
var getAccessCode = function(id, openTabs) {
var url = "http://www.partify.club/api/auth?spotifyId=" + id;
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var jsonResponse = JSON.parse(xmlhttp.responseText);
var localAccessCode = jsonResponse["accessCode"];
var localPlaylistId = jsonResponse["playlistId"];
playlistId = localPlaylistId;
accessCode = localAccessCode;
if (openTabs) {
openTabsInitially();
}
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
var login = function() {
var url = "http://www.partify.club/login"
chrome.tabs.create({url: url, active: true}, function callback(tab) {});
}
var refreshPlaylist = function() {
refreshed = true;
var starredPlaylistUrl = "spotify:user:" + spotifyId + ":starred";
var partifyPlaylistUrl = "spotify:user:" + spotifyId + ":playlist:" + playlistId;
chrome.tabs.create({"url":starredPlaylistUrl, "active":false}, function(tab){});
setTimeout(function() {
chrome.tabs.create({"url":partifyPlaylistUrl,"active":false}, function(tab){});
}, 500);
setTimeout(function() { removeTab(starredPlaylistUrl) }, 1000);
setTimeout(function() { removeTab(partifyPlaylistUrl) }, 1000);
}
var getStatus = function() {
var xmlhttp = new XMLHttpRequest();
url = "https://" + makeid(10) + ".spotilocal.com:" + port.toString() + "/remote/status.json?csrf=" + csrf + "&oauth=" + oauth;
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var jsonResponse = JSON.parse(xmlhttp.responseText);
if (jsonResponse["error"]) {
initializeTokens();
} else if (jsonResponse["track"]["track_resource"]["uri"]) {
var trackUri = jsonResponse["track"]["track_resource"]["uri"];
var localCurrentTrack = trackUri;
var updated = updateTrackId(jsonResponse);
var properties = ["volume", "playing", "shuffle", "repeat"];
var length = jsonResponse["track"]["length"];
var position = jsonResponse["playing_position"];
playingPositionGlobal = position;
lengthGlobal = length;
var percent = (position / length) * 100;
var skipDetected = false;
var changed = updateProperties(properties, jsonResponse);
var skipThreshold = (updateIntervalSeconds / length) * 100.00;
if (currentPosition) {
var delta = Math.abs(percent - currentPosition)
if (delta > (skipThreshold * skipThresholdMultiplier)) {
skipDetected = true;
}
}
if (!updated && (changed || skipDetected)) {
postTrackToPlaylist(position, length, false);
}
currentPosition = percent;
if (percent >= refreshThreshold && refreshed == false) {
//refreshPlaylist();
}
}
}
else if ((xmlhttp.readyState == 4 && xmlhttp.status == 0) || (xmlhttp.readyState == 0 && xmlhttp.status == 0)) {
xmlhttp.abort();
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
var getOauth = function() {
var xmlhttp = new XMLHttpRequest();
url = "http://open.spotify.com/token";
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var jsonResponse = JSON.parse(xmlhttp.responseText);
oauth = jsonResponse["t"];
}
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
var getCsrf = function() {
var xmlhttp = new XMLHttpRequest();
url = "https://" + makeid(10) + ".spotilocal.com:" + port.toString() + "/simplecsrf/token.json?service=remote";
xmlhttp.onreadystatechange = function(){
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var jsonResponse = JSON.parse(xmlhttp.responseText);
csrf = jsonResponse["token"];
return;
}
}
xmlhttp.onerror = function() {
port += 1;
if (port == 4390) {
port = 4370;
}
setTimeout(function() { getCsrf(); }, 500);
}
xmlhttp.open("GET", url, true);
xmlhttp.send();
}