--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gpp/legacy/management/commands/import_old_links.py	Wed Jan 05 04:09:35 2011 +0000
@@ -0,0 +1,83 @@
+"""
+import_old_links.py - For importing links from SG101 1.0 as csv files.
+"""
+import csv
+import datetime
+
+from django.core.management.base import LabelCommand, CommandError
+from django.contrib.auth.models import User
+
+from weblinks.models import Link, Category
+
+
+class Command(LabelCommand):
+    args = '<filename filename ...>'
+    help = 'Imports weblinks from the old database in CSV format'
+
+    def handle_label(self, filename, **options):
+        """
+        Process each line in the CSV file given by filename by
+        creating a new weblink object and saving it to the database.
+
+        """
+        self.cats = {}
+        try:
+            self.default_user = User.objects.get(pk=2)
+        except User.DoesNotExist:
+            raise CommandError("Need a default user with pk=1")
+
+        try:
+            with open(filename, "rb") as f:
+                self.reader = csv.DictReader(f)
+                try:
+                    for row in self.reader:
+                        self.process_row(row)
+                except csv.Error, e:
+                    raise CommandError("CSV error: %s %s %s" % (
+                        filename, self.reader.line_num, e))
+
+        except IOError:
+            raise CommandError("Could not open file: %s" % filename)
+
+    def get_category(self, row):
+        """
+        Return the Category object for the row.
+
+        """
+        cat_id = row['cid']
+        if cat_id not in self.cats:
+            try:
+                cat = Category.objects.get(pk=cat_id)
+            except Category.DoesNotExist:
+                raise CommandError("Category does not exist: %s on line %s" % (
+                    cat_id, self.reader.line_num))
+            else:
+                self.cats[cat_id] = cat
+        return self.cats[cat_id]
+
+    def get_user(self, username):
+        """
+        Return the user object for the given username.
+        If the user cannot be found, self.default_user is returned.
+
+        """
+        try:
+            return User.objects.get(username=username)
+        except User.DoesNotExist:
+            return self.default_user
+
+    def process_row(self, row):
+        """
+        Process one row from the CSV file: create an object for the row
+        and save it in the database.
+
+        """
+        link = Link(category=self.get_category(row),
+            title=row['title'].decode('latin-1'),
+            url=row['url'].decode('latin-1'),
+            description=row['description'].decode('latin-1'),
+            user=self.get_user(row['submitter']),
+            date_added=datetime.datetime.strptime(row['date'], "%Y-%m-%d %H:%M:%S"),
+            hits=int(row['hits']),
+            is_public=True)
+        link.save()