Image operations with Photoshop and ExtendScript

#target photoshop

app.bringToFront();

var Constants = {
    Author: "Antelle",
    OutputImageQuality: 11,
    FileMask: "*.*g",
    InputDir: "d:\\Photos4Habr",
    OutputDir: "d:\\Photos4Habr\\Output",
    AddLogo: {
        LogoPath: "d:\\Logo.psd"
    },
    Resize: {
        MaxWidth: 400,
        MaxHeight: 600
    }
};

ProcessDir(Constants.InputDir, Constants.OutputDir);

function ProcessDir(dir, outDir) {
    var folder = Folder(dir);
    var files = folder.getFiles(Constants.FileMask);
    var outFolder = Folder(outDir);
    if (!outFolder.exists) {
        if (!outFolder.create()) {
            alert("Cannot create output folder");
            return;
        }
    }
    var totalFiles = 0;
    for (var fileNum in files) {
         var outFile = GetOutputFileName(files[fileNum], outFolder.fullName);
         AddFrameToFile(files[fileNum], outFile);
         totalFiles++;
    }
    alert(totalFiles + " files processed");
}

function GetOutputFileName(file, outDir) {
    return outDir + /(\/[^\/]+$)/.exec(file)[1];
}

function SaveFile(outputFile) {
    var isPng = /png$/i.test(outputFile);
    var saveOptions;
    if (isPng) {
        saveOptions = new PNGSaveOptions();
        saveOptions.interlaced = false;
    } else {
        saveOptions = new JPEGSaveOptions();
        saveOptions.embedColorProfile = true;
        saveOptions.formatOptions = FormatOptions.STANDARDBASELINE;
        saveOptions.matte = MatteType.NONE
        saveOptions.quality = Constants.OutputImageQuality;
    }
    app.activeDocument.saveAs(File(outputFile), saveOptions, true, Extension.LOWERCASE)

    app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
}

function AddLogoToFile(file, outputFile) {
    var photoFile = File(file);
    var logoFile = File(Constants.AddLogo.LogoPath);

    app.open(logoFile);
    app.activeDocument.artLayers["Text"].copy();

    var logoWidth = app.activeDocument.width.as("px");
    var logoHeight = app.activeDocument.height.as("px");
    app.activeDocument.close();

    app.open(photoFile);

    var width = app.activeDocument.width.as("px");
    var height = app.activeDocument.height.as("px");

    var logoLayer = app.activeDocument.artLayers.add();
    logoLayer.name = "Logo";

    app.activeDocumetn

    app.activeDocument.paste();

    var shape = [
        [(width - logoWidth) / 2, (height - logoHeight) / 2],
        [(width - logoWidth) / 2, (height + logoHeight) / 2],
        [(width + logoWidth) / 2, (height + logoHeight) / 2],
        [(width + logoWidth) / 2, (height - logoHeight) / 2]
    ];
    app.activeDocument.selection.select(shape);

    app.activeDocument.selection.translate(
        new UnitValue((width - logoWidth)/ 2, "px"),
        new UnitValue((height - logoHeight) / 2, "px"));

    var minImageDimension = Math.min(width, height);
    var logoScaleMultiplier = minImageDimension / 5 / logoWidth * 100;
    app.activeDocument.selection.resize(logoScaleMultiplier, logoScaleMultiplier, AnchorPosition.BOTTOMRIGHT);

    app.activeDocument.selection.deselect();

    app.activeDocument.artLayers["Logo"].opacity = 75;
    app.activeDocument.artLayers["Logo"].blendMode = BlendMode.LUMINOSITY;

    SaveFile(outputFile);
}

function AddFrameToFile(file, outputFile) {
    var photoFile = File(file);

    app.open(photoFile);

    var width = app.activeDocument.width.as("px");
    var height = app.activeDocument.height.as("px");

    var backgroungLayer = app.activeDocument.artLayers[0];
    backgroungLayer.isBackgroundLayer = false;

    var frameLayer = app.activeDocument.artLayers.add();
    frameLayer.name = "Frame";

    frameLayer.move(backgroungLayer, ElementPlacement.PLACEAFTER);

    app.activeDocument.resizeCanvas(new UnitValue(width + 10, "px"), new UnitValue(height + 10, "px"), AnchorPosition.MIDDLECENTER);

    var color = new SolidColor();
    color.rgb.red = 0xff;
    color.rgb.green = 0xff;
    color.rgb.blue = 0xff;
    app.activeDocument.selection.fill(color);
    var shape = [
        [3, 3],
        [3, height + 7],
        [width + 7, height + 7],
        [width + 7, 3]
    ];
    app.activeDocument.selection.select(shape, SelectionType.REPLACE, 1, false);
    color = new SolidColor();
    color.rgb.red = 0xa9;
    color.rgb.green = 0xcc;
    color.rgb.blue = 0xf5;
    app.activeDocument.selection.fill(color);

    SaveFile(outputFile);
}

function ResizeFile(file, outputFile) {
    var photoFile = File(file);

    app.open(photoFile);

    var width = app.activeDocument.width.as("px");
    var height = app.activeDocument.height.as("px");

    var widthScaleFactor = width / Constants.Resize.MaxWidth;
    var heightScaleFactor = height / Constants.Resize.MaxHeight;
    var maxScaleFactor = Math.max(widthScaleFactor, heightScaleFactor);

    if (maxScaleFactor > 1) {
        app.activeDocument.resizeImage(
            new UnitValue(width / maxScaleFactor, "px"),
            new UnitValue(height / maxScaleFactor, "px"));
    }

    SaveFile(outputFile);
}