Add option to share bookmarks publicly (#503)

* Make shared view public, add user profile fallback

* Allow unauthenticated access to shared bookmarks API

* Link shared bookmarks in unauthenticated layout

* Add public sharing setting

* Only show shared bookmarks link if there are publicly shared bookmarks

* Disable public sharing if sharing is disabled

* Show specific helper text when public sharing is enabled

* Fix tests

* Add more tests

* Improve setting description

bookmarks/e2e/e2e_test_settings_general.py

@@ -0,0 +1,39 @@
+from django.urls import reverse
+from playwright.sync_api import sync_playwright, expect
+
+from bookmarks.e2e.helpers import LinkdingE2ETestCase
+
+
+class SettingsGeneralE2ETestCase(LinkdingE2ETestCase):
+    def test_should_only_enable_public_sharing_if_sharing_is_enabled(self):
+        with sync_playwright() as p:
+            browser = self.setup_browser(p)
+            page = browser.new_page()
+            page.goto(self.live_server_url + reverse('bookmarks:settings.general'))
+
+            enable_sharing = page.get_by_label('Enable bookmark sharing')
+            enable_sharing_label = page.get_by_text('Enable bookmark sharing')
+            enable_public_sharing = page.get_by_label('Enable public bookmark sharing')
+            enable_public_sharing_label = page.get_by_text('Enable public bookmark sharing')
+
+            # Public sharing is disabled by default
+            expect(enable_sharing).not_to_be_checked()
+            expect(enable_public_sharing).not_to_be_checked()
+            expect(enable_public_sharing).to_be_disabled()
+
+            # Enable sharing
+            enable_sharing_label.click()
+            expect(enable_sharing).to_be_checked()
+            expect(enable_public_sharing).not_to_be_checked()
+            expect(enable_public_sharing).to_be_enabled()
+
+            # Enable public sharing
+            enable_public_sharing_label.click()
+            expect(enable_public_sharing).to_be_checked()
+            expect(enable_public_sharing).to_be_enabled()
+
+            # Disable sharing
+            enable_sharing_label.click()
+            expect(enable_sharing).not_to_be_checked()
+            expect(enable_public_sharing).not_to_be_checked()
+            expect(enable_public_sharing).to_be_disabled()