nzb_sorter.py

#!/usr/bin/env python2

import xml.etree.ElementTree as ET
import sys

def get_tag_uri(element):
    if element.tag[0] == "{":
        uri = element.tag[1:].partition("}")[0]
    else:
        uri = None
    return uri

def main():

    # Take in nzb file as first argument
    tree = ET.parse(sys.argv[1])
    # Get root of XML ElementTree
    root = tree.getroot()
    # Try to find the URI associated with the namespace
    try:
        uri = get_tag_uri(root[0])
    except:
        print "Whoops, it looks like there are no files in this nzb."
        sys.exit(-1)
    # Set namespace to null so we get a properly formatted xml file on output
    ET.register_namespace('', uri)

    # Sort root by subject into new list
    sorted_list = sorted(root, key=lambda child: child.attrib['subject'])

    # Move things around so that *rar comes before *r00
    rar_index = -1
    r00_index = -1

    # Find the indices of rar and r00
    for index, child in enumerate(sorted_list):
        if ".rar" in child.attrib['subject']:
            rar_index = index
        if ".r00" in child.attrib['subject']:
            r00_index = index

    # If we found both, move rar infront of r00
    if rar_index >= 0 and r00_index >= 0:
        rar_element = sorted_list[rar_index]
        sorted_list.remove(rar_element)
        sorted_list.insert(r00_index, rar_element)

    # Remove all child elements from the root and add them back in order
    for child in sorted_list:
        root.remove(child)
        root.append(child)

    # Rebuild element tree
    tree = ET.ElementTree(root)
    # Output the new sorted nzb
    tree.write(sys.argv[1])

if __name__ == "__main__":
    main()