Resize Screen Shots

script.cocoascript

var onRun = function(context) {
    var selectedLayers = context.selection
    var selectedCount = selectedLayers.count()
    
    for (var i = 0; i < selectedCount; i++) {
        var layer = selectedLayers[i]
        
        if (typeof(layer.NSImage) == 'undefined') {
            continue
        }
        
        var frame = layer.frame()
        var originalSize = layer.NSImage().size()
        
        layer.constrainProportions = false

        if (originalSize.width == 1242 && originalSize.height == 2208) {
            frame.width = originalSize.width / 3
            frame.height = originalSize.height / 3
        } else if (originalSize.width > 320) {
            frame.width = originalSize.width / 2
            frame.height = originalSize.height / 2
        } else {
            frame.width = originalSize.width
            frame.height = originalSize.height
        }
        
        layer.constrainProportions = true

        frame.x = i * 100
        frame.y = 0
    }
};