Switches the spot colors in the specified swatch group to the spot color values of the selected group. Adobe Illustrator script

replaceSwatchGroup.jsx

/*
  Switches the spot colors in the specified swatch group to the spot color values of the selected group or by index matching
  Discussion: https://community.adobe.com/t5/illustrator-discussions/a-script-to-look-at-one-group-og-swatches-and-replace-with-another-group-of-swatches/td-p/14070309
  Author: Sergey Osokin, email: [email protected]
  Check my other scripts: https://github.com/creold
  Donate (optional):
  If you find this script helpful, you can buy me a coffee
  - via Buymeacoffee: https://www.buymeacoffee.com/aiscripts
  - via Donatty https://donatty.com/sergosokin
  - via DonatePay https://new.donatepay.ru/en/@osokin
  - via YooMoney https://yoomoney.ru/to/410011149615582
*/

//@target illustrator
app.preferences.setBooleanPreference('ShowExternalJSXWarning', false); // Fix drag and drop a .jsx file

// Main function
function main() {
  var destName = 'Working Pallete'; // Edit destination group name

  if (!documents.length) return;

  var doc = app.activeDocument;
  try {
    var destGroup = doc.swatchGroups.getByName(destName);
  } catch (e) {
    alert('Group ' + destName + ' not found');
    return;
  }

  var swGroups = [];
  for (var i = 0; i < doc.swatchGroups.length; i++) {
    if (doc.swatchGroups[i].name !== '') {
      swGroups.push(doc.swatchGroups[i].name);
    }
  }

  if (swGroups.length == 0) {
    alert('No swatch groups found');
    return;
  }

  var win = new Window('dialog', 'Swatches Replacement');
  win.alignChildren = 'fill';
  win.add('statictext', undefined, 'Destination: ' + destName);
  var swList = win.add('dropdownlist', undefined, swGroups);
  swList.selection = 0;
  var isByOrder = win.add('checkbox', undefined, 'Replace by swatches order');

  var btns = win.add('group');
  var cancelBtn = btns.add('button', undefined, 'Cancel', {name: 'cancel'});
  var rplcBtn = btns.add('button', undefined, 'Replace Colors', {name: 'ok'});

  cancelBtn.onClick = win.close;

  rplcBtn.onClick = function() {
    var selGroup = swList.selection.text;
    if (selGroup === destName) {
      alert('Select a group other than destination');
      return;
    }
    replaceSwatches(destGroup, selGroup, isByOrder.value);
    win.close();
  };

  win.show();
}

function replaceSwatches(dest, src, isByOrder) {
  var doc = app.activeDocument;
  var isRgb = /rgb/i.test(doc.documentColorSpace);

  try {
    var selGroup = doc.swatchGroups.getByName(src);
  } catch (e) {
    alert('Group ' + src + ' not found');
    return;
  }
  
  var destColors = dest.getAllSwatches();
  var selColors = selGroup.getAllSwatches();

  for (var j = 0; j < destColors.length; j++) {
    var sw = destColors[j];
    var name = sw.name.toLowerCase();
    if (isNotSpot(sw)) continue;

    if (isByOrder) {
      if (selColors[j] && !isNotSpot(selColors[j])) replaceColor(sw, selColors[j], isRgb);
    } else {
      for (var k = 0; k < selColors.length; k++) {
        var selSw = selColors[k];
        if (isNotSpot(selSw)) continue;
        if (selSw.name.toLowerCase().indexOf(name) != -1) {
          replaceColor(sw, selSw, isRgb);
        }
      }
    }
  }
}

function isNotSpot(sw) {
  return sw.color.typename !== 'SpotColor';
}

function replaceColor(sw1, sw2, isRgb) {
  var c1 = sw1.color.spot.color;
  var c2 = sw2.color.spot.color;
  if (isRgb) {
    c1.red = c2.red;
    c1.green = c2.green;
    c1.blue = c2.blue;
  } else {
    c1.cyan = c2.cyan;
    c1.magenta = c2.magenta;
    c1.yellow = c2.yellow;
    c1.black = c2.black;
  }
}

// Run script
try {
  main();
} catch (e) {}

New version — ColorGroupReplacer.
More about script in Telegram channel.