Add bookmark sharing (#311)

* Allow marking bookmarks as shared

* Add basic share view

* Ensure tag names in tag cloud are unique

* Filter shared bookmarks by user

* Add link for filtering by user

* Prevent n+1 queries when rendering bookmark list

* Prevent empty query params in return URL

* Fix user select template tag name

* Create shared bookmarks through API

* List shared bookmarks through API

* Show bookmark suggestions for shared view

* Show unique tags in search suggestions

* Sort user options

* Add bookmark sharing feature flag

* Add test for share setting default

* Simplify settings view

bookmarks/tests/test_nav_menu.py

@@ -0,0 +1,30 @@
+from django.test import TestCase
+from django.urls import reverse
+
+from bookmarks.tests.helpers import BookmarkFactoryMixin
+
+
+class NavMenuTestCase(TestCase, BookmarkFactoryMixin):
+
+    def setUp(self) -> None:
+        user = self.get_or_create_test_user()
+        self.client.force_login(user)
+
+    def test_should_respect_share_profile_setting(self):
+        self.user.profile.enable_sharing = False
+        self.user.profile.save()
+        response = self.client.get(reverse('bookmarks:index'))
+        html = response.content.decode()
+
+        self.assertInHTML(f'''
+            <a href="{reverse('bookmarks:shared')}" class="btn btn-link">Shared</a>
+        ''', html, count=0)
+
+        self.user.profile.enable_sharing = True
+        self.user.profile.save()
+        response = self.client.get(reverse('bookmarks:index'))
+        html = response.content.decode()
+
+        self.assertInHTML(f'''
+            <a href="{reverse('bookmarks:shared')}" class="btn btn-link">Shared</a>
+        ''', html, count=2)