PhotoShop ExtendScript file to Photomerge selected files in pairs using reposition

Xpan.jsx

// Create a file in the path "Adobe Photoshop 2022/Presets/Scripts/Xpan.jsx" and paste the contents there to use
// Xpan Stitcher, author Mika Kuitunen

var runphotomergeFromScript = true; // must be before Photomerge include
//@include "Photomerge.jsx"
//@show include

// DEBUGGING STUFF

function ConsoleLog() {
  // Seeing logs: macOS: nc -lvk 8000, Win: install Ncat, then ncat -lk 8000
  this.socket = new Socket();
  this.hostPort = "127.0.0.1:8000";
}

ConsoleLog.prototype.log = function(logMessage){
  if (!debug) return;
  
  if (this.socket.open(this.hostPort)){
    this.socket.write (logMessage + "\n");
    this.socket.close();
  }
};

var debug = false;
var console = new ConsoleLog();

// ----------------------------------------------------------------------------
// MAIN SCRIPT

// override Photomerge.jsx settings
// "Auto", "Prsp", "cylindrical", "spherical", "sceneCollage", "translation"
photomerge.alignmentKey       = "translation";
photomerge.advancedBlending   = true;
photomerge.lensCorrection     = false;
photomerge.removeVignette     = false;
photomerge.autoFillTrans      = false;

// TIFF options
// https://theiviaxx.github.io/photoshop-docs/Photoshop/TiffSaveOptions.html
var tiffOpts = new TiffSaveOptions();
tiffOpts.imageCompression = TIFFEncoding.TIFFZIP;
tiffOpts.layers = false;

// Progress bar UI
function progress(steps) {
  var progressBar;
  
  var progressWindow = new Window("palette", "Progress", undefined, {closeButton: false});
  var progressText = progressWindow.add("statictext");
  progressText.preferredSize = [450, -1]; // 450 pixels wide, default height.
  
  if (steps) {
    progressBar = progressWindow.add("progressbar", undefined, 0, steps);
    progressBar.preferredSize = [450, -1]; // 450 pixels wide, default height.
  }
  
  progress.close = function () {
    progressWindow.close();
  };
  
  progress.increment = function () {
    progressBar.value++;
  };
  
  progress.message = function (message) {
    progressText.text = message;
  };
  
  progressWindow.show();
}

function main() {
  var fList = File.openDialog("Select file pairs for stitching", undefined, true);
  
  if (!fList) {
    console.log("User aborted");
    return;
  }
  
  if (fList.length % 2 !== 0) {
    alert("Uneven number of files selected, aborting");
    console.log("Abort mission");
    return;
  }
  
  // Each file pair takes two steps, merging and saving
  var progressSteps = fList.length;
  var filePairTotal = fList.length / 2;
  progress(progressSteps);
  
  for (var i = 0; i < fList.length - 1; i += 2) {
    var files = [fList[i], fList[i+1]];
    
    console.log("Loop " + i + ", files " + files[0].name + ", " + files[1].name);
    var currentFilePair = i / 2 + 1;
    progress.message("Processing files " + files[0].name + ", " + files[1].name + " (" + currentFilePair + " of " + filePairTotal + ")");
    
    photomerge.createPanorama(files, false);
    
    progress.increment();
    
    // The naming algorithm assumes names like "0032-01.CR3"
    // The name is split at the dash into prefix and suffix
    // The final name is constructed as "[prefix]-[file 1 suffix]-[file 2 suffix].tif"
    var name = "";
    for (var j = 0; j < files.length; j++) {
      if (name === "") {
        name = files[j].displayName.split(".").shift();
      } else {
        name += "-" + files[j].displayName.split(".").shift().split("-").pop();
      }
    }
    
    // Save result one level above the source files if possible
    var path = fList[0].parent.path || fList[0].path;
    
    console.log("Saving " + path + "/" + name + ".tif");
    progress.message("Saving ..." + path.slice(-30) + "/" + name + ".tif");
    
    activeDocument.saveAs( new File( path + "/" + name ) , tiffOpts, true, Extension.LOWERCASE );
    activeDocument.close( SaveOptions.DONOTSAVECHANGES );
    
    progress.increment();
  }
  
  progress.close();
  console.log("Done");
}

main();