Using color sampler values with curves adjustment layer

I think that I was somewhat miss-leading. The scriptlistener plug-in outputs Action Manger code but that is not the same as it being equal. Yes, scirptlistener only records the settings used for that recorded acton. Sometimes you can use the code straight from the scriptlistener log but most of the time you will want to edit it so it uses variables instead of the hard coded settings.

I have been thinking about how this script would work. For one thing it would be limited to 4 points on the curve because of the ColorSampler limit of four samples. The ActionDescriptor for a curve expects the points to be in order so you would either need to place the colorSamplers in order i.e. the first sampler is for the black point of the curve or come up with a way to determine what sample is to be used for each curve point. Creating the curve descriptor will be the hardest part of writing a script to do this task.

As for the rest, yes, it is easy. I would do something like this...

// create a function fo hold most of the code
function createCurveAdjustmetFromColorSamplers(){
    // first add some condition checks
    // needs an open document in a color mode that supports layers
    if(app.documents.length == 0 || ( app.activeDocument.mode == DocumentMode.BITMAP || app.activeDocument.mode == DocumentMode.INDEXEDCOLOR ) ){    
        alert('This script requires a document in Greyscale, RGB, CMYK, or Lab mode.');
        return;
    }
    // check for at least two colorSamplers
    if(app.activeDocument.colorSamplers.length < 2 ){
        alert('This script requires at least two colorSamplers.');
        return;
    }
    // last check for at least two layers - assume they will be on same level( not in layerSet )
    if(app.activeDocument.layers.length < 2 ){
        alert('This script requires at least two layers.');
        return;
    }
    // create varaibles to hold the colorSampler's color property for each layer
    // for the bottom layer
    var outputArray = new Array();
    // for top layer - array could also be created this way
    var inputArray = [];
    // store the number of samples because it will be needed in more than one place
    var numberOfSamples = app.activeDocument.colorSamplers.length;
    
    // hide the top layer
    app.activeDocument.layers[0].visible = false;
    // collect the samples from the bottom layer
    for(var sampleIndex = 0; sampleIndex < numberOfSamples; sampleIndex++ ){
        outputArray.push(app.activeDocument.colorSamplers[sampleIndex].color);
    }
    // turn the top layer back on
    app.activeDocument.layers[0].visible = true;
    // collect those samples
    for(var sampleIndex = 0; sampleIndex < numberOfSamples; sampleIndex++ ){
        inputArray.push(app.activeDocument.colorSamplers[sampleIndex].color);
    }
    // make sure the top layer is the activeLayer
    app.activeDocument.activeLayer = app.activeDocument.layers[0];
    // use Action Manager code to create new curve adjustment layer
    makeCurveAdjustmentLayer();
}
function makeCurveAdjustmentLayer(){//works with any mode
   var desc = new ActionDescriptor();
   var ref = new ActionReference();
     ref.putClass( charIDToTypeID( "AdjL" ) );
   desc.putReference( charIDToTypeID( "null" ), ref );
   var desc1 = new ActionDescriptor();
     desc1.putClass( charIDToTypeID( "Type" ), charIDToTypeID("Crvs" ) );
   desc.putObject( charIDToTypeID( "Usng" ), charIDToTypeID( "AdjL" ), desc1 );
   executeAction( charIDToTypeID( "Mk  " ), desc, DialogModes.NO );
}
// call the function to run the script
createCurveAdjustmetFromColorSamplers();