Combining Mulitple Photoshop files into 1 Photoshop file with Artboards

@Enzo5EB8 

Where are you at?

I originally created this script for this topic thread... The following script merges layers to a single layer. If require multi-layered artboards, then the script below is not for you.

/*
Stack Merged Files to Artboards.jsx
v1.1, 31 July 2021 - Artboards are stacked on top of each other for manual arrangement
v1.2, 8th May 2024 - Added code from r-bin to auto arrange the artboards into a grid
v1.3, 9th May 2024 - Added code to set the artboard background colour
By Stephen Marsh
https://community.adobe.com/t5/photoshop-ecosystem/combining-mulitple-photoshop-files-into-1-photoshop-file-with-artboards/td-p/12218200
NOTE: Does not retain multiple layers!
*/

#target photoshop

try {

    if (app.documents.length === 0) {

        (function () {

            // Capture the original ruler units and set the ruler units to pixels
            var origUnits = app.preferences.rulerUnits;
            app.preferences.rulerUnits = Units.PIXELS;

            // Select the input folder
            var inputFolder = Folder.selectDialog('Please select the input folder:');
            // Test if Cancel button returns null, then do nothing
            if (inputFolder === null) {
                app.beep();
                return;
            }

            // Supported file formats
            var inputFiles = inputFolder.getFiles(/\.(jpg|jpeg|tif|tiff|png|psd|psb)$/i);
            // Alpha numeric sort
            inputFiles.sort().reverse();

            // Process the first "base" file
            var firstFile = app.open(File(inputFiles[0]));
            var firstFileName = app.activeDocument.name;
            app.activeDocument.duplicate("Artboard Stack from Files", true);
            firstFile.close(SaveOptions.DONOTSAVECHANGES);
            var artboardStack = app.activeDocument;
            app.activeDocument = artboardStack;
            artboardStack.activeLayer.name = firstFileName;
            // Call the 1st artboard function
            artBoardFromLayers();
            artBoardBackground(3);
            artboardStack.activeLayer.name = firstFileName.replace(/\.[^\.]+$/, '');

            // Process the remaining files to the "base" file
            for (var i = 1; i < inputFiles.length; i++) {
                var remainingFiles = app.open(File(inputFiles[i]));
                if (app.activeDocument.layers.length > 1) {
                    app.activeDocument.mergeVisibleLayers();
                }
                var fileName = remainingFiles.name;
                remainingFiles.activeLayer.name = fileName;
                remainingFiles.layers[0].duplicate(artboardStack, ElementPlacement.PLACEATBEGINNING);
                remainingFiles.close(SaveOptions.DONOTSAVECHANGES);
                // Call the 2nd artboard function
                artBoardFromLayers2();
                artBoardBackground(3);
            }

            // Arrange the artboards to a grid
            arrangeArtboards();

            // Return the original ruler units
            app.preferences.rulerUnits = origUnits;

            // End of script
            app.beep();


            ///// Functions /////

            function artBoardFromLayers() {
                app.runMenuItem(stringIDToTypeID("artboardFromLayersEvent"));
            }

            function artBoardFromLayers2() {
                var artboardFromLayers = stringIDToTypeID("make");
                var desc1156 = new ActionDescriptor();
                var idnull = stringIDToTypeID("null");
                var ref558 = new ActionReference();
                var idartboardSection = stringIDToTypeID("artboardSection");
                ref558.putClass(idartboardSection);
                desc1156.putReference(idnull, ref558);
                var idfrom = stringIDToTypeID("from");
                var ref559 = new ActionReference();
                var idlayer = stringIDToTypeID("layer");
                var idordinal = stringIDToTypeID("ordinal");
                var idtargetEnum = stringIDToTypeID("targetEnum");
                ref559.putEnumerated(idlayer, idordinal, idtargetEnum);
                desc1156.putReference(idfrom, ref559);
                var idusing = stringIDToTypeID("using");
                var desc1157 = new ActionDescriptor();
                var idname = stringIDToTypeID("name");
                var abName = fileName.replace(/\.[^\.]+$/, '');
                desc1157.putString(idname, abName);
                var idartboardSection = stringIDToTypeID("artboardSection");
                desc1156.putObject(idusing, idartboardSection, desc1157);
                var idlayerSectionStart = stringIDToTypeID("layerSectionStart");
                desc1156.putInteger(idlayerSectionStart, 3);
                var idlayerSectionEnd = stringIDToTypeID("layerSectionEnd");
                desc1156.putInteger(idlayerSectionEnd, 4);
                var idname = stringIDToTypeID("name");
                desc1156.putString(idname, abName);
                executeAction(artboardFromLayers, desc1156, DialogModes.NO);
            }

            function arrangeArtboards() {
                /*
                https://community.adobe.com/t5/photoshop-ecosystem-discussions/script-to-arrange-artboard-in-grid/td-p/9417657
                by r-bin
                */

                var abLength = app.activeDocument.layerSets.length;

                var clms = 2;
                var space_x = 50;
                var space_y = 50;

                clms = prompt("Arrange " + abLength + " artboards into a grid. \r Enter the number of columns:", clms);
                if (clms) {
                    clms = Number(clms);
                    var arts = new Array();
                    var w = 0;
                    var h = 0;
                    for (var i = 0; i < activeDocument.layerSets.length; i++) {
                        var r = new ActionReference();
                        r.putProperty(stringIDToTypeID("property"), stringIDToTypeID("artboardEnabled"));
                        r.putIdentifier(stringIDToTypeID("layer"), activeDocument.layerSets[i].id);

                        if (executeActionGet(r).getBoolean(stringIDToTypeID("artboardEnabled"))) {
                            var r = new ActionReference();
                            r.putProperty(stringIDToTypeID("property"), stringIDToTypeID("artboard"));
                            r.putIdentifier(stringIDToTypeID("layer"), activeDocument.layerSets[i].id);

                            var rect = executeActionGet(r).getObjectValue(stringIDToTypeID("artboard")).getObjectValue(stringIDToTypeID("artboardRect"));

                            var l = rect.getDouble(stringIDToTypeID("left"));
                            var t = rect.getDouble(stringIDToTypeID("top"));
                            var r = rect.getDouble(stringIDToTypeID("right"));
                            var b = rect.getDouble(stringIDToTypeID("bottom"));

                            arts.push([activeDocument.layerSets, [l, t, r, b]]);

                            var w1 = r - l;
                            var h1 = b - t;

                            if (w1 > w) w = w1;
                            if (h1 > h) h = h1;
                        }
                    }
                    var rows = Math.floor(arts.length / clms);
                    if (rows * clms < arts.length) ++rows;
                    var i = 0;
                    for (var y = 0; y < rows; y++) {
                        var pos_y = y * (h + space_y);
                        for (var x = 0; x < clms; x++) {
                            if (i >= arts.length) break;
                            activeDocument.activeLayer = arts[x][0][i];
                            var pos_x = x * (w + space_x);
                            move(pos_x - arts[x][1][0], pos_y - arts[x][1][1])
                            i += 1;
                        }
                    }
                }

                function move(x, y) {
                    try {
                        var d = new ActionDescriptor();
                        var r = new ActionReference();
                        r.putEnumerated(stringIDToTypeID("layer"), stringIDToTypeID("ordinal"), stringIDToTypeID("targetEnum"));
                        d.putReference(stringIDToTypeID("null"), r);
                        var d1 = new ActionDescriptor();
                        d1.putUnitDouble(stringIDToTypeID("horizontal"), stringIDToTypeID("pixelsUnit"), x);
                        d1.putUnitDouble(stringIDToTypeID("vertical"), stringIDToTypeID("pixelsUnit"), y);
                        d.putObject(stringIDToTypeID("to"), stringIDToTypeID("offset"), d1);
                        executeAction(stringIDToTypeID("move"), d, DialogModes.NO);
                    } catch (e) {
                        throw (e);
                    }
                }
            }

        })();

        function artBoardBackground(artBoardColor) {
            /* https://community.adobe.com/t5/photoshop-ecosystem-discussions/setting-artboard-background-to-transparent/m-p/12438157 */
            var ideditArtboardEvent = stringIDToTypeID("editArtboardEvent");
            var desc520 = new ActionDescriptor();
            var idnull = stringIDToTypeID("null");
            var ref129 = new ActionReference();
            var idlayer = stringIDToTypeID("layer");
            var idordinal = stringIDToTypeID("ordinal");
            var idtargetEnum = stringIDToTypeID("targetEnum");
            var desc521 = new ActionDescriptor();
            var idartboard = stringIDToTypeID("artboard");
            var idchangeBackground = stringIDToTypeID("changeBackground");
            ref129.putEnumerated(idlayer, idordinal, idtargetEnum);
            desc520.putReference(idnull, ref129);
            // Static options for "Other" idartboardBackgroundType = 4
            var idcolor = stringIDToTypeID("color");
            var desc523 = new ActionDescriptor();
            var idred = stringIDToTypeID("red");
            desc523.putDouble(idred, 128.000000);
            var idgrain = stringIDToTypeID("grain");
            desc523.putDouble(idgrain, 128.000000);
            var idblue = stringIDToTypeID("blue");
            desc523.putDouble(idblue, 128.000000);
            var idRGBColor = stringIDToTypeID("RGBColor");
            desc521.putObject(idcolor, idRGBColor, desc523);
            var idartboardBackgroundType = stringIDToTypeID("artboardBackgroundType");
            // putInteger 1 = White, 2 = Black, 3 = Transparent, 4 = Other
            desc521.putInteger(idartboardBackgroundType, artBoardColor);
            desc520.putObject(idartboard, idartboard, desc521);
            desc520.putInteger(idchangeBackground, 1);
            executeAction(ideditArtboardEvent, desc520, DialogModes.NO);
        }

    } else {
        alert('Please close all open files before running this script...');
    }

} catch (e) {
    alert("Error!" + "\r" + e + ' ' + e.line);
}

https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html

If you try File > Scripts > Load Files into Stack... with artboards, it'll merge the artboards but place the content of the files on separate layers in a new document. So what you could do instead is first use File > Export > Artboards to Files... and then use File > Scripts > Load Files into Stack.