Implement basic importer

bookmarks/services/importer.py

@@ -0,0 +1,42 @@
+from datetime import datetime
+
+from bs4 import BeautifulSoup, Tag
+from django.contrib.auth.models import User
+
+from bookmarks.models import Bookmark
+
+
+def import_netscape_html(html: str, user: User):
+    soup = BeautifulSoup(html, 'html.parser')
+
+    bookmark_tags = soup.find_all('dt')
+
+    for bookmark_tag in bookmark_tags:
+        _import_bookmark_tag(bookmark_tag, user)
+
+
+def _import_bookmark_tag(bookmark_tag: Tag, user: User):
+    link_tag = bookmark_tag.a
+
+    if link_tag is None:
+        return
+
+    # Either modify existing bookmark for the URL or create new one
+    url = link_tag['href']
+    bookmark = _get_or_create_bookmark(url, user)
+
+    bookmark.url = url
+    bookmark.date_added = datetime.utcfromtimestamp(int(link_tag['add_date']))
+    bookmark.date_modified = bookmark.date_added
+    bookmark.unread = link_tag['toread'] == '1'
+    bookmark.title = link_tag.string
+    bookmark.owner = user
+
+    bookmark.save()
+
+
+def _get_or_create_bookmark(url: str, user: User):
+    try:
+        return Bookmark.objects.get(url=url, owner=user)
+    except Bookmark.DoesNotExist:
+        return Bookmark()