Implement bookmark export

bookmarks/services/exporter.py

@@ -0,0 +1,44 @@
+from typing import List
+
+from bookmarks.models import Bookmark
+
+BookmarkDocument = List[str]
+
+
+def export_netscape_html(bookmarks: List[Bookmark]):
+    doc = []
+    append_header(doc)
+    append_list_start(doc)
+    [append_bookmark(doc, bookmark) for bookmark in bookmarks]
+    append_list_end(doc)
+
+    return '\n\r'.join(doc)
+
+
+def append_header(doc: BookmarkDocument):
+    doc.append('<!DOCTYPE NETSCAPE-Bookmark-file-1>')
+    doc.append('<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">')
+    doc.append('<TITLE>Bookmarks</TITLE>')
+    doc.append('<H1>Bookmarks</H1>')
+
+
+def append_list_start(doc: BookmarkDocument):
+    doc.append('<DL><p>')
+
+
+def append_bookmark(doc: BookmarkDocument, bookmark: Bookmark):
+    url = bookmark.url
+    title = bookmark.resolved_title
+    desc = bookmark.resolved_description
+    tags = ','.join(bookmark.tag_names)
+    toread = '1' if bookmark.unread else '0'
+    added = int(bookmark.date_added.timestamp())
+
+    doc.append(f'<DT><A HREF="{url}" ADD_DATE="{added}" PRIVATE="0" TOREAD="{toread}" TAGS="{tags}">{title}</A>')
+
+    if desc:
+        doc.append(f'<DD>{desc}')
+
+
+def append_list_end(doc: BookmarkDocument):
+    doc.append('</DL><p>')