Merge layers with the same name into one layer. Adobe Illustrator script

MergeLayersByName.jsx

/*
  Merge layers with the same name into one layer
  Discussion: https://community.adobe.com/t5/illustrator-discussions/script-to-merge-layers-that-have-the-same-name-into-sublayers/td-p/14968548
  Author: Sergey Osokin, email: [email protected]
  Check my other scripts: https://github.com/creold

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*/

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

function main() {
  var isSublayer = false;

  if (!/illustrator/i.test(app.name)) {
    alert('Wrong application\nRun script from Adobe Illustrator', 'Script error');
    return;
  }

  if (!documents.length) {
    alert('No documents\nOpen a document and try again', 'Script error');
    return;
  }

  isSublayer = confirm('How to merge layers?\nAs sublayers of a new layer (Yes) or their objects (No)');
  // alert(isSublayer);
  // return;

  var doc = app.activeDocument;
  var layerGroups = collectSameLayers(doc.layers);

  for (var i = layerGroups.length - 1; i >= 0; i--) {
    mergeLayersToNew(doc, layerGroups[i], isSublayer);
  }
}

// Group layers by matching names into an array of objects
function collectSameLayers(layers) {
  var layerGroups = [];

  for (var i = 0; i < layers.length; i++) {
    var currLayer = layers[i];
    var currName = currLayer.name;
    var isFound = false;

    for (var j = 0; j < layerGroups.length; j++) {
      if (layerGroups[j].name === currName) {
        layerGroups[j].layers.push(currLayer);
        isFound = true;
        break;
      }
    }

    if (!isFound) {
      layerGroups.push({
        name: currName,
        layers: [currLayer]
      });
    }
  }

  return layerGroups;
}

// Merges multiple layers into a single layer
function mergeLayersToNew(doc, group, isSublayer) {
  // Exit if there are fewer than two layers to merge
  if (group.layers.length < 2) return;

  var tgtLayer = isSublayer ? doc.layers.add() : group.layers[0];
  tgtLayer.name = group.name;
  tgtLayer.color = group.layers[0].color;

  var startIdx = isSublayer ? 0 : 1;

  for (var i = startIdx; i < group.layers.length; i++) {
    var currLayer = group.layers[i];
    var isVisible = currLayer.visible;
    var isLocked = currLayer.locked;

    currLayer.visible = true;
    currLayer.locked = false;

    // Move the entire layer or all pageItems
    if (isSublayer) {
      currLayer.move(tgtLayer, ElementPlacement.PLACEATEND);
      currLayer.visible = isVisible;
      currLayer.locked = isLocked;
    } else {
      movePageItems(currLayer, tgtLayer);
      currLayer.remove();
    }
  }
}

// Moves all items from a source layer to a target layer
function movePageItems(srcLayer, tgtLayer) {
  var pItems = [];
  for (var i = 0; i < srcLayer.pageItems.length; i++) {
    pItems.push(srcLayer.pageItems[i]);
  }

  for (var j = 0; j < pItems.length; j++) {
    pItems[j].move(tgtLayer, ElementPlacement.PLACEATEND);
  }
}

try {
  main();
} catch (err) {}

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