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maloja/scrobblers/chromium-youtubemusic/background.js

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chrome.tabs.onUpdated.addListener(onTabUpdated);
chrome.tabs.onRemoved.addListener(onTabRemoved);
chrome.runtime.onMessage.addListener(onPlaybackUpdate);
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var patterns = [
"https://music.youtube.com",
"http://music.youtube.com"
];
function onTabUpdated(tabId, changeInfo, tab) {
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if (changeInfo.status !== "complete") {
return;
}
console.log("Update")
chrome.tabs.get(tabId,party)
}
function onTabRemoved() {
}
function party(tab) {
importantPage = false
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for (var i=0;i<patterns.length;i++) {
if (tab.url.startsWith(patterns[i])) {
importantPage = true
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}
}
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if (importantPage) {
window.setTimeout(function(){chrome.tabs.executeScript(tab.id,{"file":"contentScript.js"})},1000); // youtube for some reason decides to not update the artist immediately
}
}
function onPlaybackUpdate(request,sender) {
//console.log("Got update from Plex Web!")
if (request.type == "stopPlayback" && currentlyPlaying) {
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stopPlayback(request.artist,request.title);
}
else if (request.type == "startPlayback") {
startPlayback(request.artist,request.title,request.duration);
}
}
var currentTitle;
var currentArtist;
var currentLength;
var alreadyPlayed;
var currentlyPlaying = false;
var lastUpdate = 0;
var alreadyScrobbled = false;
function startPlayback(artist,title,seconds) {
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// CASE 1: Resuming playback of previously played title
if (artist == currentArtist && title == currentTitle && !currentlyPlaying) {
console.log("Resuming playback")
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// Already played full song
while (alreadyPlayed > currentLength) {
alreadyPlayed = alreadyPlayed - currentLength
scrobble(currentArtist,currentTitle,currentLength)
}
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setUpdate()
currentlyPlaying = true
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}
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// CASE 2: New track is being played
else if (artist != currentArtist || title != currentTitle) {
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//first inform ourselves that the previous track has now been stopped for good
stopPlayback(artist,title)
//then initialize new playback
console.log("New track")
setUpdate()
alreadyPlayed = 0
currentTitle = title
currentArtist = artist
currentLength = seconds
console.log(artist + " - " + title + " is playing!")
currentlyPlaying = true
}
}
// the artist and title arguments are not attributes of the track being stopped, but of the track active now
// they are here to recognize whether the playback has been paused or completely ended / replaced
function stopPlayback(artist,title) {
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//CASE 1: Playback just paused OR CASE 2: Playback ended
if (currentlyPlaying) {
d = setUpdate()
alreadyPlayed = alreadyPlayed + d
console.log(d + " seconds played since last update, " + alreadyPlayed + " seconds played overall")
}
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// Already played full song
while (alreadyPlayed > currentLength) {
alreadyPlayed = alreadyPlayed - currentLength
scrobble(currentArtist,currentTitle,currentLength)
}
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currentlyPlaying = false
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//ONLY CASE 2: Playback ended
if (artist != currentArtist || title != currentTitle) {
if (alreadyPlayed > currentLength / 2) {
scrobble(currentArtist,currentTitle,alreadyPlayed)
alreadyPlayed = 0
}
}
}
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// One problem here: Closing the player while it's paused does not cause an event, so the track will only be scrobbled the next time we play something.
// Also potentially problematic: Pausing a track and just leaving it should probably trigger a scrobble after some time because we can assume the user just stopped listening but didn't bother to press the X
// We could simply check for scrobblability when the track is paused, but this would remove the ability to send listening time with the scrobble
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function ostopPlayback(artist,title) {
currentlyPlaying = false
console.log("Playback stopped!")
d = new Date()
t = Math.floor(d.getTime()/1000)
delta = t - lastUpdate
console.log("Since the last update, " + delta + " seconds of music have been played")
alreadyPlayed = alreadyPlayed + delta
console.log(alreadyPlayed + " seconds of this track have been played overall")
if ((alreadyPlayed > currentLength/2) && !alreadyScrobbled) {
console.log("Enough to scrobble: " + currentArtist + " - " + currentTitle)
scrobble(currentArtist,currentTitle)
alreadyScrobbled = true
}
}
function ostartPlayback(artist,title,seconds) {
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console.log("Playback started!")
if (artist == currentArtist && title == currentTitle && !currentlyPlaying) {
console.log("Still previous track!")
while (alreadyPlayed > currentLength) {
console.log("This song is being played several times in a row!")
if (!alreadyScrobbled) {
scrobble(currentArtist,currentTitle)
//alreadyScrobbled = true
}
alreadyPlayed = alreadyPlayed - currentLength
alreadyScrobbled = false
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}
d = new Date()
t = Math.floor(d.getTime()/1000)
lastUpdate = t
currentlyPlaying = true
}
else if (artist != currentArtist || title != currentTitle) {
console.log("New track!")
if (currentlyPlaying) {
console.log("We were playing another track before, so let's check if we should scrobble that.")
d = new Date()
t = Math.floor(d.getTime()/1000)
delta = t - lastUpdate
console.log("Since the last update, " + delta + " seconds of music have been played")
alreadyPlayed = alreadyPlayed + delta
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}
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console.log("The previous track was played for " + alreadyPlayed + " seconds, that's " + Math.floor(alreadyPlayed/currentLength * 100) + "% of its length.")
if (alreadyPlayed > currentLength/2 && !alreadyScrobbled) {
console.log("Enough to scrobble: " + currentArtist + " - " + currentTitle)
scrobble(currentArtist,currentTitle)
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}
else if (alreadyScrobbled) {
console.log("We already scrobbled this track tho.")
alreadyScrobbled = false
}
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console.log("But now, new track!")
d = new Date()
t = Math.floor(d.getTime()/1000)
lastUpdate = t
alreadyPlayed = 0
currentTitle = title
currentArtist = artist
currentLength = seconds
console.log(artist + " - " + title + " is playing!")
currentlyPlaying = true
}
}
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function scrobble(artist,title,seconds) {
console.log("Scrobbling " + artist + " - " + title + "; " + seconds + " seconds playtime")
artiststring = encodeURIComponent(artist)
titlestring = encodeURIComponent(title)
chrome.storage.local.get("apikey",function(result) {
APIKEY = result["apikey"]
chrome.storage.local.get("serverurl",function(result) {
URL = result["serverurl"]
var xhttp = new XMLHttpRequest();
xhttp.open("POST",URL + "/db/newscrobble",true);
xhttp.send("artist=" + artiststring + "&title=" + titlestring + "&duration=" + seconds + "&key=" + APIKEY)
});
});
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}
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function setUpdate() {
d = new Date()
t = Math.floor(d.getTime()/1000)
delta = t - lastUpdate
lastUpdate = t
return delta
}