resizeFileForWeb.jsx

// Created by Nathaniel Young (nyoungstudios)
// this script resizes a photo with the optimal settings for web use including services like Squarespace or Wix
// saves resized files in folder that the user selects

//wrapper function
function main() {

  // opens file dialog for user to select the file to process
  var filePathName = File.openDialog("Pick a file");
  
  // checks if the user does not select a file
  if (filePathName == null) {
    return;
  } else {
    filePathName = filePathName.toString();
  }

  // opens folder dialog for user to select the folder to process
  var saveLocation = Folder.selectDialog("Pick a destination folder");
  
  // checks if the user does not select a folder
  if (saveLocation == null) {
    return;
  } else {
    saveLocation = saveLocation.toString() + '/';
  }

  // parameters
  var longEdgeOfDocument = 2048;
  var quality = 10;


  // removes the file extension
  var baseDocName = filePathName.substring(filePathName.lastIndexOf('/') + 1, filePathName.lastIndexOf('.'));

  
  // appends underscore (_) if the original document name ends in a number
  var lastChar = baseDocName[baseDocName.length - 1];

  if (lastChar >= '0' && lastChar <= '9') {
    baseDocName += '_';
  }


  // =======================================================
  // opens photo
  var idOpn = charIDToTypeID( "Opn " );
      var desc01 = new ActionDescriptor();
      var iddontRecord = stringIDToTypeID( "dontRecord" );
      desc01.putBoolean( iddontRecord, false );
      var idforceNotify = stringIDToTypeID( "forceNotify" );
      desc01.putBoolean( idforceNotify, true );
      var idnull = charIDToTypeID( "null" );
      desc01.putPath( idnull, new File( filePathName ) );
      var idDocI = charIDToTypeID( "DocI" );
      desc01.putInteger( idDocI, 286 );
  executeAction( idOpn, desc01, DialogModes.NO );

  // =======================================================
  // gets the current active document open
  currentDocument = app.activeDocument;
  var originalWidthOfDocument = parseInt(currentDocument.width.toString().replace(' px', ''));
  var originalHeightOfDocument = parseInt(currentDocument.height.toString().replace(' px', ''));


  if (originalWidthOfDocument >= originalHeightOfDocument) {
    // =======================================================
    // resizes photo if it is in landsacpe orientation
    var idImgS = charIDToTypeID( "ImgS" );
        var desc02 = new ActionDescriptor();
        var idWdth = charIDToTypeID( "Wdth" );
        var idPxl = charIDToTypeID( "#Pxl" );
        desc02.putUnitDouble( idWdth, idPxl, longEdgeOfDocument );
        var idscaleStyles = stringIDToTypeID( "scaleStyles" );
        desc02.putBoolean( idscaleStyles, true );
        var idCnsP = charIDToTypeID( "CnsP" );
        desc02.putBoolean( idCnsP, true );
        var idIntr = charIDToTypeID( "Intr" );
        var idIntp = charIDToTypeID( "Intp" );
        var idautomaticInterpolation = stringIDToTypeID( "automaticInterpolation" );
        desc02.putEnumerated( idIntr, idIntp, idautomaticInterpolation );
    executeAction( idImgS, desc02, DialogModes.NO );

  } else {
    // =======================================================
      // resizes photo if it is in portrait orientation
    var idImgS = charIDToTypeID( "ImgS" );
        var desc05 = new ActionDescriptor();
        var idHght = charIDToTypeID( "Hght" );
        var idPxl = charIDToTypeID( "#Pxl" );
        desc05.putUnitDouble( idHght, idPxl, longEdgeOfDocument );
        var idscaleStyles = stringIDToTypeID( "scaleStyles" );
        desc05.putBoolean( idscaleStyles, true );
        var idCnsP = charIDToTypeID( "CnsP" );
        desc05.putBoolean( idCnsP, true );
        var idIntr = charIDToTypeID( "Intr" );
        var idIntp = charIDToTypeID( "Intp" );
        var idautomaticInterpolation = stringIDToTypeID( "automaticInterpolation" );
        desc05.putEnumerated( idIntr, idIntp, idautomaticInterpolation );
    executeAction( idImgS, desc05, DialogModes.NO );
  }

  // appends the width of the document
  baseDocName += currentDocument.width.toString().replace(' px', '');

  // =======================================================
  // saves jpg photo
  var idsave = charIDToTypeID( "save" );
      var desc03 = new ActionDescriptor();
      var idAs = charIDToTypeID( "As  " );
          var desc04 = new ActionDescriptor();
          var idEQlt = charIDToTypeID( "EQlt" );
          desc04.putInteger( idEQlt, quality );
          var idMttC = charIDToTypeID( "MttC" );
          var idMttC = charIDToTypeID( "MttC" );
          var idNone = charIDToTypeID( "None" );
          desc04.putEnumerated( idMttC, idMttC, idNone );
      var idJPEG = charIDToTypeID( "JPEG" );
      desc03.putObject( idAs, idJPEG, desc04 );
      var idIn = charIDToTypeID( "In  " );
      desc03.putPath( idIn, new File( saveLocation + baseDocName + ".jpg" ) );
      var idDocI = charIDToTypeID( "DocI" );
      desc03.putInteger( idDocI, 1363 );
      var idCpy = charIDToTypeID( "Cpy " );
      desc03.putBoolean( idCpy, true );
      var idsaveStage = stringIDToTypeID( "saveStage" );
      var idsaveStageType = stringIDToTypeID( "saveStageType" );
      var idsaveBegin = stringIDToTypeID( "saveBegin" );
      desc03.putEnumerated( idsaveStage, idsaveStageType, idsaveBegin );
  executeAction( idsave, desc03, DialogModes.NO );

  // =======================================================
  // closes photoshop file
  currentDocument.close(SaveOptions.DONOTSAVECHANGES);


};

main();