1 files changed, 132 insertions, 0 deletions
diff --git a/app/backend/import_cals.py b/app/backend/import_cals.py
new file mode 100644
index 0000000..f0b5262
--- /dev/null
+++ b/app/backend/import_cals.py
@@ -0,0 +1,132 @@
+import json
+import os
+import re
+import time
+import urllib2
+import urlparse
+
+from sqlalchemy import inspect
+
+from rcal.db import Session
+from rcal.model import Calendar, Category
+
+BASEPATH = os.path.join(
+    os.environ['PYTHONPATH'],
+    '..',
+    '..')
+
+CONFIG = json.load(open(
+    os.path.join(
+        os.environ['PYTHONPATH'],
+        'config',
+        'reddit-import.json'),
+    'r'))
+
+
+def get_cal_list():
+    cache_path = os.path.join(
+        BASEPATH,
+        CONFIG['cache'])
+    if not os.path.exists(cache_path) or \
+       int(time.time()) - int(os.path.getmtime(cache_path)) > \
+       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['data']['content_md']
+        with open(cache_path, 'w') as cache_file:
+            cache_file.write(cal_list)
+            cache_file.close()
+    else:
+        cal_list = open(cache_path, 'r').read()
+    return cal_list
+
+
+def update_calendar(cal, session):
+    db_cal = Calendar.fetch(cal['uid'], session)
+
+    if inspect(db_cal).pending:
+        print 'Adding calendar %s (%s)' % (cal['name'], cal['uid'])
+        db_cal.name = cal['name']
+        db_cal.url = cal['url']
+        db_cal.website = cal['website']
+        db_cal.category = Category.fetch(cal['category'], session)
+
+    if db_cal.name != cal['name']:
+        print 'Updating calendar name: %s -> %s (%s)' % (
+            db_cal.name, cal['name'], db_cal.uid)
+        db_cal.name = cal['name']
+    if db_cal.url != cal['url']:
+        print 'Updating calendar url: %s -> %s (%s)' % (
+            db_cal.url, cal['url'], db_cal.uid)
+        db_cal.url = cal['url']
+    if db_cal.website != cal['website']:
+        print 'Updating calendar website: %s -> %s (%s)' % (
+            db_cal.website, cal['website'], db_cal.uid)
+        db_cal.website = cal['website']
+
+    if 'category_mapping' in CONFIG and \
+       cal['category'] in CONFIG['category_mapping']:
+        cal['category'] = CONFIG['category_mapping'][cal['category']]
+
+    # informational only
+    if db_cal.category.name != cal['category']:
+        print 'Calendar category changed: %s -> %s (%s, %s)' % (
+            db_cal.category.name, cal['category'], db_cal.name, db_cal.uid)
+
+
+def get_imported_calendars(cells, ical_markdown):
+    imported_calendars = []
+    for row in cells:
+        row = [r for r in row if r.strip()]
+        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:
+                        imported_calendars.append({
+                            'uid': ical_path[0],
+                            'url': ical_url.geturl(),
+                            'name': row[0],
+                            'website': row[4].split()[0],
+                            'category': row[1]
+                        })
+                    else:
+                        print 'Unknown iCal URL format: %s' % (
+                            ical_url.geturl())
+                else:
+                    print 'Unknown iCal URL format: %s' % (
+                        ical_url.geturl())
+    return imported_calendars
+
+
+def main():
+    session = Session.create()
+
+    cal_list = get_cal_list()
+
+    ical_markdown = re.compile(r'^\[iCal\]\((.*)\)$')
+    cells = [row.split('|') for row in cal_list.split('\n')]
+
+    imported_calendars = get_imported_calendars(cells, ical_markdown)
+    imported_calendar_uids = [c['uid'] for c in imported_calendars]
+
+    db_only_calendars = session.query(Calendar).filter(
+        ~Calendar.uid.in_(imported_calendar_uids)).all()
+
+    if len(db_only_calendars):
+        print 'Local calendars not in remote source:'
+        for cal in db_only_calendars:
+            print '%s (%s)' % (cal.name, cal.uid)
+        print
+
+    for cal in imported_calendars:
+        update_calendar(cal, session)
+
+    session.commit()
+
+if __name__ == '__main__':
+    main()