GimpPython Plugin: Add all open Images as layer into one

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#!/usr/bin/env python
# -*- coding: utf-8 -*-

# GIMP plugin to set all visible layers to the same mode
# (c) steffakasid 2012
#
#   History:
#
#   v1.0: 2015-30-04: First published version
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

from gimpfu import *

def openImagesAsLayers(selected_image,debug):
    try:
        if(debug == True):
            gimp.message("Starting to add all images...")
    
        selected_image_name = pdb.gimp_image_get_name(selected_image)
        
        if(debug == True):
            gimp.message("Base image selected: "+selected_image_name)
        
        image_file_list = gimp.image_list()
        if(debug == True):
            gimp.message("Received file list: "+str(image_file_list))
        
        for image_to_load in image_file_list:
            image_path = pdb.gimp_image_get_filename(image_to_load)
            image_name = pdb.gimp_image_get_name(image_to_load)
            if(debug == True):
                gimp.message(image_path)
            
            if(selected_image_name == image_name):
                if(debug == True):
                    gimp.message("Skipping selected image to not add it again: "+selected_image_name)
            else:
                # load image as new layer of the selected_image
                layer = pdb.gimp_file_load_layer(selected_image,image_path)
            
                if(layer is None):
                    if(debug == True):
                        gimp.message("The image "+image_path+" could not be transferred into a new layer!")
                if(debug == True):
                    gimp.message("Adding layer")
                    
                # Add new layer to the selected_image
                pdb.gimp_image_insert_layer(selected_image, layer, None, 0)
                
                # Close image when it was added
                gimp.delete(image_to_load)
                gimp.displays_flush()
    except Exception as err:
        gimp.message("Unexpected error: " + str(err))
        
    gimp.message("Processing finished!")

### Registrations
    
register(
    "open-images-as-layers",
    "Adds all images into the selected one as new layers!",
    "Adds all images into the selected one as new layers!",
    "steffakasid",
    "steffakasid",
    "2015",
    "Add open images into one as new layers",
    "*",
    [
        (PF_IMAGE, "image", "Input image", None),
        (PF_BOOL, "debugging", "Enable debugging. Error Console should be open!", False)
    ],
    [],
    openImagesAsLayers,
    menu="<Image>/Image")

main()