--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/legacy/management/commands/import_old_potd_comments.py	Sat May 05 17:10:48 2012 -0500
@@ -0,0 +1,141 @@
+"""
+import_old_potd_comments.py - For importing comments on POTD's from SG101 1.0
+as csv files.
+
+"""
+from __future__ import with_statement
+import csv
+import optparse
+import sys
+from datetime import datetime
+
+from django.core.management.base import LabelCommand, CommandError
+from django.contrib.auth.models import User
+from django.contrib.contenttypes.models import ContentType
+
+from comments.models import Comment
+from potd.models import Photo
+import legacy.data
+from legacy.html2md import MarkdownWriter
+
+
+PHOTO_ID_OFFSET = 100
+ID_OFFSET = 3000
+
+
+class Command(LabelCommand):
+    args = '<filename filename ...>'
+    help = 'Imports POTD comments from the old database in CSV format'
+    option_list = LabelCommand.option_list + (
+        optparse.make_option("-p", "--progress", action="store_true",
+            help="Output a . after every 20 items to show progress"),
+        optparse.make_option("--fix-mode", action="store_true",
+            help="Only create comments if they don't exist already"),
+    )
+    md_writer = MarkdownWriter()
+
+    def handle_label(self, filename, **options):
+        """
+        Process each line in the CSV file given by filename by
+        creating a new POTD comment.
+
+        """
+        self.show_progress = options.get('progress')
+        self.fix_mode = options.get('fix_mode')
+        self.users = {}
+
+        try:
+            with open(filename, "rb") as f:
+                self.reader = csv.DictReader(f)
+                num_rows = 0
+                try:
+                    for row in self.reader:
+                        self.process_row(row)
+                        num_rows += 1
+                        if self.show_progress and num_rows % 20 == 0:
+                            sys.stdout.write('.')
+                            sys.stdout.flush()
+                except csv.Error, e:
+                    raise CommandError("CSV error: %s %s %s" % (
+                        filename, self.reader.line_num, e))
+
+                print
+
+        except IOError:
+            raise CommandError("Could not open file: %s" % filename)
+
+    def process_row(self, row):
+        """
+        Process one row from the CSV file: create a Comment object for
+        the row and save it in the database.
+
+        """
+        comment_id = int(row['cid']) + ID_OFFSET
+
+        if self.fix_mode:
+            try:
+                c = Comment.objects.get(pk=comment_id)
+            except Comment.DoesNotExist:
+                pass
+            else:
+                return
+
+        try:
+            user = self._get_user(row['username'].decode('latin-1'))
+        except User.DoesNotExist:
+            print "Could not find user %s for comment %s; skipping." % (
+                    row['username'], row['cid'])
+            return
+
+        pid = int(row['pid']) + PHOTO_ID_OFFSET
+        try:
+            photo = Photo.objects.get(id=pid)
+        except Photo.DoesNotExist:
+            print "Could not find photo %s for comment %s; skipping." % (
+                    pid, row['cid'])
+            return
+
+        comment = Comment(
+            id=comment_id,
+            content_type=ContentType.objects.get_for_model(photo),
+            object_id=photo.id,
+            user=user,
+            comment=self.to_markdown(row['comment'].decode('latin-1')),
+            creation_date=datetime.strptime(row['date'], "%Y-%m-%d %H:%M:%S"),
+            ip_address='192.0.2.0',     # TEST-NET
+            is_public=True,
+            is_removed=False,
+        )
+
+        comment.save()
+
+    def _get_user(self, username):
+        """
+        Returns the user object with the given username.
+        Throws User.DoesNotExist if not found.
+
+        """
+        try:
+            return self.users[username]
+        except KeyError:
+            pass
+
+        try:
+            user = User.objects.get(username=username)
+        except User.DoesNotExist:
+            old_name = username.lower()
+            try:
+                user = User.objects.get(
+                        username=legacy.data.KNOWN_USERNAME_CHANGES[old_name])
+            except KeyError:
+                raise User.DoesNotExist
+
+        self.users[username] = user
+        return user
+
+    def to_markdown(self, s):
+
+        s = s.replace('\n', '\n<br />')
+        self.md_writer.reset()
+        self.md_writer.feed(s)
+        return self.md_writer.markdown()