bgneal@237: """
bgneal@237: import_old_links.py - For importing links from SG101 1.0 as csv files.
bgneal@237: """
bgneal@237: import csv
bgneal@237: import datetime
bgneal@237: 
bgneal@237: from django.core.management.base import LabelCommand, CommandError
bgneal@237: from django.contrib.auth.models import User
bgneal@237: 
bgneal@237: from weblinks.models import Link, Category
bgneal@237: 
bgneal@237: 
bgneal@237: class Command(LabelCommand):
bgneal@237:     args = '<filename filename ...>'
bgneal@237:     help = 'Imports weblinks from the old database in CSV format'
bgneal@237: 
bgneal@237:     def handle_label(self, filename, **options):
bgneal@237:         """
bgneal@237:         Process each line in the CSV file given by filename by
bgneal@237:         creating a new weblink object and saving it to the database.
bgneal@237: 
bgneal@237:         """
bgneal@237:         self.cats = {}
bgneal@237:         try:
bgneal@237:             self.user = User.objects.get(pk=1)
bgneal@237:         except User.DoesNotExist:
bgneal@237:             raise CommandError("Need a default user with pk=1")
bgneal@237: 
bgneal@237:         try:
bgneal@237:             with open(filename, "rb") as f:
bgneal@237:                 self.reader = csv.DictReader(f)
bgneal@237:                 try:
bgneal@237:                     for row in self.reader:
bgneal@237:                         self.process_row(row)
bgneal@237:                 except csv.Error, e:
bgneal@237:                     raise CommandError("CSV error: %s %s %s" % (
bgneal@237:                         filename, self.reader.line_num, e))
bgneal@237: 
bgneal@237:         except IOError:
bgneal@237:             raise CommandError("Could not open file: %s" % filename)
bgneal@237: 
bgneal@237:     def get_category(self, row):
bgneal@237:         """
bgneal@237:         Return the Category object for the row.
bgneal@237: 
bgneal@237:         """
bgneal@237:         cat_id = row['cid']
bgneal@237:         if cat_id not in self.cats:
bgneal@237:             try:
bgneal@237:                 cat = Category.objects.get(pk=cat_id)
bgneal@237:             except Category.DoesNotExist:
bgneal@237:                 raise CommandError("Category does not exist: %s on line %s" % (
bgneal@237:                     cat_id, self.reader.line_num))
bgneal@237:             else:
bgneal@237:                 self.cats[cat_id] = cat
bgneal@237:         return self.cats[cat_id]
bgneal@237: 
bgneal@237:     def process_row(self, row):
bgneal@237:         """
bgneal@237:         Process one row from the CSV file: create an object for the row
bgneal@237:         and save it in the database.
bgneal@237: 
bgneal@237:         """
bgneal@237:         link = Link(category=self.get_category(row),
bgneal@237:             title=row['title'],
bgneal@237:             url=row['url'],
bgneal@237:             description=row['description'],
bgneal@237:             user=self.user,
bgneal@237:             date_added=datetime.datetime.strptime(row['date'], "%Y-%m-%d %H:%M:%S"),
bgneal@237:             hits=int(row['hits']),
bgneal@237:             is_public=True)
bgneal@237:         link.save()