Need a script that resizes layer to a specific size using the largest dimension [SOLVED]

Using Actions doesn't help and I'm not familiar with scripts.

So basically I have to resize 300 layers to 3000px using the largest size (width or height, whatever is bigger).

I saw scripts to resize images (not layers), so that won't do the job. I saw other solutions for very particular scenarios, but not what I'm looking for either, and since I'm familiar with scripting, I won't be able to adjust it to my needs.

Any chance that someone can help me with this?

I would really appreciate it, as this would save me so much time for this very tedious task and I need to deliver this asap

EDIT: I found the script that does this, but it needs a subtle change as described by the script's author @Stephen Marsh (thank you for your contribution, Stephen).

Use the following script (the original script used "Math.max" and I changed it to "Math.min" to fit the largest dimension to the canvas):

// https://forums.adobe.com/thread/1968642
// https://forums.adobe.com/message/8022190#8022190
#target photoshop    
var oldPref = app.preferences.rulerUnits    
app.preferences.rulerUnits = Units.PIXELS;    
var doc = activeDocument;   
var iLayer = doc.activeLayer;    
doc.activeLayer = iLayer;    
var scale = Math.min(doc.width/(iLayer.bounds[2]-iLayer.bounds[0]),doc.height/(iLayer.bounds[3]-iLayer.bounds[1])); // Optionally change Math.max to Math.min to fit canvas short side
iLayer.resize (scale*100,scale*100);    
iLayer.translate(doc.width/2-(iLayer.bounds[0]+iLayer.bounds[2])/2,doc.height/2-(iLayer.bounds[1]+iLayer.bounds[3])/2);
app.preferences.rulerUnits = oldPref;

To make it clear what the Math.max and Math.min do: