Constant file ID

[Casey Kolb]

Think about it like this:

1. The user uploads two files called "MyAudio1.wav" and ""MyAudio2.wav".
2. You save the file names in the external JSON with an object like the one below. You'll need a different ID for each.

{
  {
    "name": "MyAudio1.wav",
    "id": 1
  },
  {
    "name": "MyAudio2.wav",
    "id": 2
  },
}

3. In HISE, you set the value of a hidden slider (saved in preset) to 1, indicating the current file is "MyAudio1.wav"
4. Update the visible combobox items to include the new audio files
5. When the user changes the combobox selection, retrieve the actual text of the selection using ScriptComboBox.getItemText() and find the matching ID based in the external JSON on that text.
6. Save the new ID in the slider.

In this case, the combobox is purely a visual component, unrelated to the preset restoring. When the preset is restored, it will look at the hidden slider value and find the right audio file to load based on the external JSON.

[Casey Kolb]

This post is deleted!

[arminh]

@Lunacy-Audio i thought about creating json but this requires additional actions from the user. Not all of us are so technical :D

[Casey Kolb]

The user never has to do anything. You make the JSON file in the HISEScript either using the new File API or Engine.dumpAsJSON(var object, String fileName)

[Casey Kolb]

The important thing is that you never change the IDs after you've registered them. This is how you avoid breaking any previous presets.

[arminh]

@Lunacy-Audio you know how to push data to current file? because when i trying do this by writeObject i getting brand new file.

[Casey Kolb]

Yup, Engine.dumpAsJSON(myNewFile, "../myNewFile.xml"); works great but will overwrite the file if it's already there.

You just need to import the file first with Engine.loadFromJSON("../myNewFile.xml"); and then append any changes before resaving it.

[arminh]

@Lunacy-Audio ok thanks, i made a little progress

I can finally create xml with data but in file it has only last file from FileSystem array

for (f in files)
{
    var id = parseInt(Math.random()*10000);
    var p = f.toString(OnlyExtension);
    var obj = {
        path: p,
        id: id,
    };
    Engine.dumpAsJSON(obj, "../files.xml");
};

This overwrites the files instead of adding a new entry.

[Casey Kolb]

Right, take another look at that code. You only want to dump the JSON after the for loop is finished. At the moment, it's writing a new file with the object every single iteration. You need something more like this. Also be wary, the random ID is a bit deadly because there's always a change you'll get duplicate IDs.

var obj = {};
for (f in files)
{
    var id = parseInt(Math.random()*10000);
    var p = f.toString(OnlyExtension);
    obj[id] = p;
};
Engine.dumpAsJSON(obj, "../files.xml");

[arminh]

@Lunacy-Audio i wan't just test it with this random id, in normal project i'll use letters and numbers to be sure that repeat chance will be really low

[arminh]

@Lunacy-Audio unfortunately i still have one object in xml :(

[Casey Kolb]

This post is deleted!

[arminh]

@Lunacy-Audio obj outside for should be array :) and then in for loop we push obj to this arr, now i'm curios what's happen when i add new file and what's happen with id

ID chaning everytime.

The worst thing is that the order of the objects is also disturbed.

[arminh]

This post is deleted!

[Casey Kolb]

Oops yeah there was a typo in my code. Was accidentally redeclaring the obj.

Yeah, the ID will change every time if you're randomizing it. You need to check whether or not the file already exists in the external JSON and if it does, ignore it and make sure you don't use that ID again. That snippet above is just a really basic example, but you'll need to do some more checks in order to find out which ID to use next and which files have already been stored, etc.

[Christoph Hart]

Why don‘t you just sort the array of filenames alphabetically? I think the API call has even a parameter for that.

[Christoph Hart]

Ah nevermind, it hasn‘t. I‘ll add this.

[arminh]

I think this method still dosnt make sense because id and file path will be different for every user. :v

[arminh]

@Christoph-Hart maybe you have an idea how to do this or its even possible in hise?