I'm trying to write a script for 2.2.2 and I've never done this before, so please, bear with me.
1)In order to write to a file in Javascript the local environment has to support some kind of I/O object. What does KDE (or Amarok) have to offer me that I can use to write files?

Did you have a look at the Scripting Guide?

http://amarok.kde.org/wiki/Development/ ... _HowTo_2.0

Yes, that's where I started from, unless I'm missing something I don't see a way to write files there.

Well, you can access most of Qt too (not all of its modules are accessible, but many). Have a look here:

http://doc.trolltech.com/4.5/qfile.html

something like:

file = new QFile( "path" );
if( file.open( QIODevice.ReadWrite ) )
{
Do stuff!
}

should work

Thanks, but it's not working.
When I tried doing this in the Script Console it didn't work.
My code:

Code: Select all

file=new QFile("test1.txt");
if (file.open(QIODevice::WriteOnly | QIODevice::Text)){
QTextStream out (&file);
out << Amarok.Playlist.totalTrackCount()<<"\n";
}
file.close();

The error:

Code: Select all

SyntaxError: Expected `;'`)'

What am I doing wrong?

One problem at least would be that you are using c++ syntax and not js syntax.

QTextStream out (&file);

should likely be

out = new QTextStream( file );

Also, I am not sure if the << operators work at all in js

Yeah, I thought it was looking a little funky.
I fixed the syntax (I hope) so that it's JS, but now I'm getting an "undefined" error.

Code: Select all

var file=new QFile("test1.txt");
file.open(new QIODevice.OpenMode(QIODevice.WriteOnly));
if (file.isOpen()){
var out = new QTextStream(file);
out.writeString(Amarok.Playlist.totalTrackCount()+"\n");
}
file.close();

Boy do I feel foolish.
"undefined" was the output from the console, but it did create file!
I was just looking for it in the wrong place. For some reason it wrote the file to my Documents folder, not the parent folder of my music collection which is Music.
Is there any way to specify that I want the file to be written to the folder that holds the music collection without giving it a specific path?

Running it step by step in the script console works if I get rid of the "var" prefixes to the variables.

have you remembered to import qt.core ( Importer.loadQtBinding("qt.core"); ) in the script?

use Amarok.Collection.collectionLocation();

Note however that this might return several paths if the collection is spread out between several top level directories.

That worked, thanks!
I didn't import the qtcore when I was testing my code in the console and it worked fine, but when I write the actual main.js I'll need to, right?

Yup!

As well as any other special modules that you might need (qt.network, qt.gui, ...)