#!/usr/bin/python

"""
xmltv-join by Hadley Rich <hads@nice.net.nz>

Licensed under the BSD License.

Joins two or more XMLTV files. A lot faster and less dependancies than
tv_cat but doesn't validate etc. during joining.

Call like so;

cat freeview.xml sky.xml | xmltv-join > joined-file.xml

or;

xmltv-join freeview.xml sky.xml > joined-file.xml

"""

import sys
from xml.etree import cElementTree as ElementTree
from optparse import OptionParser

VERSION = '0.1.0'

def indent(elem, level=0):
    i = "\n" + level * "\t"
    if len(elem):
        if not elem.text or not elem.text.strip():
            elem.text = i + "\t"
        if not elem.tail or not elem.tail.strip():
            elem.tail = i
        for elem in elem:
            indent(elem, level+1)
        if not elem.tail or not elem.tail.strip():
            elem.tail = i
    else:
        if level and (not elem.tail or not elem.tail.strip()):
            elem.tail = i

if __name__ == '__main__':
    parser = OptionParser(version='%prog ' + str(VERSION))
    (options, args) = parser.parse_args()

    if sys.stdin.isatty():
        data = ''
        for arg in args:
            data += open(arg).read()
    else:
        data = sys.stdin.read()

    files = ['%s</tv>' % x.strip() for x in data.split('</tv>') if x.strip()]
    trees = []
    out = ElementTree.Element('tv')

    for f in files:
        trees.append(ElementTree.XML(f))

    for tree in trees:
        for channel in tree.findall('.//channel'):
            out.append(channel)
    for tree in trees:
        for programme in tree.findall('.//programme'):
            out.append(programme)

    indent(out)
    ElementTree.dump(out)