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import json
import os
import re
import time
import urllib2
import urlparse

from rcal.db import Session
from rcal.model import Calendar, Category

CONFIG = json.load(open(
    os.path.join(
        os.path.dirname(os.path.realpath(__file__)),
        'conf',
        'reddit-import.json'),
    'r'))


def main():
    cal_list = None

    if not os.path.exists(CONFIG['cache']) or \
       int(time.time()) - int(os.path.getmtime(CONFIG['cache'])) > \
       CONFIG['cache_time']:
        opener = urllib2.build_opener()
        opener.addheaders = [('User-Agent', CONFIG['user_agent'])]
        cal_list = json.loads(opener.open(CONFIG['reddit_url']).read())
        cal_list = cal_list[0]['data']['children'][0]['data']['selftext']
        with open(CONFIG['cache'], 'w') as cache_file:
            cache_file.write(cal_list)
            cache_file.close()
    else:
        cal_list = open(CONFIG['cache'], 'r').read()

    session = Session.create()

    ical_markdown = re.compile(r'^\[iCal\]\((.*)\)$')

    cells = [row.split('|') for row in cal_list.split('\n')]
    for row in cells:
        if len(row) == 7:
            row = [r for r in row if r]
            if len(row) == 5:
                markdown_match = re.match(ical_markdown, row[2])
                if markdown_match:
                    ical_url = urlparse.urlparse(markdown_match.group(1))
                    if ical_url.netloc == 'calendar.google.com':
                        ical_path = re.sub(
                            '^/?calendar/ical/', '', ical_url.path).split('/')
                        if len(ical_path) == 3:
                            calendar_uid = ical_path[0]
                            calendar = Calendar.fetch(
                                calendar_uid,
                                session,
                                row[0],
                                ical_url.geturl())
                            calendar.website = row[4]
                            calendar.category = Category.fetch(row[1], session)
                        else:
                            print ical_url.geturl()
                    else:
                        print ical_url.geturl()

    session.commit()

if __name__ == '__main__':
    main()