#! /usr/bin/env python

from BeautifulSoup import BeautifulStoneSoup
from codecs import open
import os
import argparse
import time

def wp2html(xml):
    xmlfile = open(xml, encoding='utf-8').read()
    soup = BeautifulStoneSoup(xmlfile)
    items = soup.rss.channel.findAll('item')

    for item in items:
        if item.fetch('wp:status')[0].contents[0] == "publish":
            title = item.title.contents[0]
            content = item.fetch('content:encoded')[0].contents[0]
            filename = item.fetch('wp:post_name')[0].contents[0]
            
            raw_date = item.fetch('wp:post_date')[0].contents[0]
            date_object = time.strptime(raw_date, "%Y-%m-%d %H:%M:%S")
            date = time.strftime("%Y-%m-%d %H:%M", date_object)
            
            author = item.fetch('dc:creator')[0].contents[0].title()
            categories = [(cat['nicename'],cat.contents[0]) for cat in item.fetch(domain='category')]
            
            tags = [tag.contents[0].title() for tag in item.fetch(domain='tag', nicename=None)]
            
            yield (title, content, filename, date, author, categories, tags)

def buildHeader(title, date, author, categories, tags):
    header = '%s\n%s\n' % (title, '#' * len(title))
    if (date != None):
        header += ':date: %s\n' % (date)
    if (categories != []):
        header += ':category: %s\n' % (', '.join(categories))
    if (tags != []):
        header += ':tags: %s\n' % (', '.join(tags))
    header += '\n'
    return header

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description="""Transform a wordpress xml export into rst files """)

    parser.add_argument(dest='xml', help='The xml filepath')
    parser.add_argument('-o', '--output', dest='output', default='output', help='Output path')
    args = parser.parse_args() 

    for title, content, filename, date, author, categories in wp2html(args.xml): 
        html_filename = os.path.join(args.output, filename+'.html')
        
        if(len(categories) == 1):
            rst_filename = os.path.join(args.output, categories[0][0], filename+'.rst.dr')
            if not os.path.isdir(os.path.join(args.output, categories[0][0])):
                os.mkdir(os.path.join(args.output, categories[0][0]))
        else:
            rst_filename = os.path.join(args.output, filename+'.rst.dr')

        with open(html_filename, 'w', encoding='utf-8') as fp:
            fp.write(content)
            
        os.system('pandoc --from=html --to=rst -o %s %s' % (rst_filename,
            html_filename))
        
        os.remove(html_filename)
            
        with open(rst_filename, 'r', encoding='utf-8') as fs:
            content = fs.read()
        with open(rst_filename, 'w', encoding='utf-8') as fs:
            categories = [x[1] for x in categories]
            header = buildHeader(title, date, author, categories, tags)
            fs.write(header+content)