// ==UserScript==
// @name CueBrainz v1.3
// @namespace naja.nitewinds.org
// @description Generate a cue sheet directly from musicbrainz.org
// @include http://*musicbrainz.org/release/*
// @include http://*musicbrainz.org/show/release/*
// @include http://*musicbrainz.org/album/*
// ==/UserScript==
// Add our link to the page
//=========================
//Select the right td field to add our link
var node = document.evaluate( '//table [@class = "releaselinks"] // td [@class = "links"] // td [@class = "info"]',
document,
null,
XPathResult.FIRST_ORDERED_NODE_TYPE,
null ).singleNodeValue;
node.removeChild( node.lastChild ); //get rid of the ']'
sepText = document.createTextNode( " | " );
endText = document.createTextNode( " ] " );
ourLinkText = document.createTextNode( "Generate Cue-Sheet" );
link = document.createElement( "a" );
link.href = "javascript: var dfd1fFCF;"; //we just need some href attribute to keep it a link. This shouldn't do nothing,
link.appendChild( ourLinkText ); //however, we still prevent it later with event.preventdefault();
//If you wonder why it needs to be a link; just so we dont have to care about the style.
node.appendChild( sepText );
node.appendChild( link );
node.appendChild( endText );
//Create our function to generate the cue sheet
//This function is big, because it has to hold everything after the greasemonkey
//script stops running, this way, we don't have to use unsafeWindow
//==============================================================================
link.addEventListener( "click", function( event )
{
//Retrieve the MBID from the link in the Release section.
//don't use the document.location because this exists also:
//http://musicbrainz.org/show/release/?releaseid=532461
var linkText = document.evaluate( '//table [ @class = "releasebegin" ] // a [ contains( @id,"link::" ) ]',
document,
null,
XPathResult.FIRST_ORDERED_NODE_TYPE,
null ).singleNodeValue.href;
var expr = /\/release\/([^\.]+)/; //Get everything between "/release/" and "."
expr.test( linkText );
var MBID = RegExp.$1;
//Request the album info from musicbrainz webservice
var req = new XMLHttpRequest();
try
{
req.open("GET", "http://" + document.domain + "/ws/1/release/" + MBID + "?type=xml&inc=tracks+artist", true);
}
catch( oException )
{
alert( "We encountered a javascript exception while trying to request data from musicbrainz.org.\n" +
"If this error persists, please write to: najamelan->gmail.com with information on how\n" +
"to reproduce it.\n\n" +
"Now follows the exception thrown by the mozilla javascript engine:\n\"" +
oException + "\"" );
}
req.setRequestHeader( "User-agent", "Mozilla/4.0 (compatible) Greasemonkey/ Cue-Sheet Generator v1.0 / najamelan->gmail.com" );
req.setRequestHeader( "Accept", "application/xml, text/xml" );
req.onreadystatechange = function (aEvt)
{
if( req.readyState == 4 ) //If it's fully loaded
{
if( req.status == 200 ) //And it was succesfull
{
var dom = req.responseXML;
//Add the disc info to the cuesheet
//=================================
//make sure it has no double quotes, cause that fucks up bad style
var cueSheet = "REM Cue-Sheet generated from musicbrainz.org\r\n"
if( performer = dom.getElementsByTagName("artist")[0].getElementsByTagName("name")[0].firstChild.nodeValue.replace( /"/g, "''") )
{
cueSheet += "PERFORMER \"" + performer;
}
if( cdTitle = dom.getElementsByTagName("title")[0].firstChild.nodeValue.replace( /"/g, "''") )
{
cueSheet += "\"\r\nTITLE \"" + cdTitle;
}
cueSheet += "\"\r\nFILE \"PUT YOUR FILENAME HERE\" WAVE\r\n";
//Add our tracks
//==============
function convDuration( x )
//Convert duration in milliseconds from musicbrains to mm:ss:ff (frames) for cuesheets
//thanx to Sven Hoffmeister for the convertion code
{
var frames = Math.round( x*0.075 ) % 75; // calculate inaccurate frames (0.075 is the ratio frames/ms)
var msec = frames / 0.075; // calculate accurate equivalent of frames
var sec = Math.round( ( x - msec ) / 1000 ) % 60;
var min = Math.round( ( x - msec - ( sec*1000 ) ) / (60 * 1000) );
return ( min <10 ? "0" + min : min ) + ":" + ( sec <10 ? "0" + sec : sec ) + ":" + ( frames <10 ? "0" + frames : frames );
}
var trackList = dom.getElementsByTagName( "track" ); //get a list of all the tracks
var trackCount = trackList.length;
var timeOffset = 0;
var duration = 0;
var timeProblemFlag = 0; //For when time for certain tracks is unknown, we should stop writing indexes
for( var i = 1; i <= trackCount; ++i )
//Iterate trough the tracks, to build the entries
{
cueSheet += " TRACK " + ( i <10 ? "0" + i : i ) + " AUDIO\r\n";
//For various artist discs, include the performer with the track.
if( trackList[i-1].getElementsByTagName("artist")[0] )
{
var trPerformer = trackList[i-1].getElementsByTagName("name")[0].firstChild.nodeValue.replace( /"/g, "''")
cueSheet += " PERFORMER \"" + trPerformer + "\"\r\n"
}
if( trackList[i-1].getElementsByTagName("title")[0] )
{
var trTitle = trackList[i-1].getElementsByTagName("title")[0].firstChild.nodeValue.replace( /"/g, "''");
cueSheet += " TITLE \"" + trTitle + "\" \r\n";
}
if( timeProblemFlag ) //if there have been tracks without duration
{
cueSheet += " INDEX 01 ??:??:??\r\n";
continue;
}
cueSheet += " INDEX 01 " + convDuration( duration + timeOffset ) + "\r\n";//so far so good, so write it.
if ( !trackList[i-1].getElementsByTagName("duration")[0] && !timeProblemFlag ) //if this is the first one without duration
{
timeProblemFlag = 1;
}
if( !timeProblemFlag ) //calculate values for the next track
{
timeOffset += duration;
duration = parseInt( trackList[i-1].getElementsByTagName("duration")[0].firstChild.nodeValue );
}
}
//Give a save as box to download the CueSheet
document.location = "data:text/CueSheet;charset=utf-8," + encodeURI( cueSheet ); //dataURL
}
else alert( "We encountered an error trying to retrieve data from musicbrainz.org\n" +
"If this error persists, and musicbrainz is not down, please write to:\n" +
"najamelan->gmail.com with information on how to reproduce it.\n\n" +
"Now follows the error message retrieved from musicbrainz.org:\n\n" +
req.responseText ); // if the status code was not 200
}
}; //end of our XMLHttpRequest onreadystatechange
try
{
req.send(null);
}
catch( exception )
{
alert( "We encountered a javascript exception while trying to request data from musicbrainz.org.\n" +
"If this error persists, please write to: najamelan@gmail.com with information on how\n" +
"to reproduce it.\n\n" +
"Now follows the exception thrown by the mozilla javascript engine:\n" +
"=======================================================\n" +
exception + "\"" );
}
event.preventDefault();
}, true ); //end of our addEventListener()
