Add support for context path (#313)

* Add support for context path

add an optional environment variable: LD_CONTEXT_PATH

* Fix for pull request code review comments

Co-authored-by: s2marine <s2marine@gmail.com>

bookmarks/tests/test_context_path.py

@@ -0,0 +1,53 @@
+import importlib
+
+from django.test import TestCase, override_settings
+from django.urls import reverse
+
+
+class MockUrlConf:
+    def __init__(self, module):
+        self.urlpatterns = module.urlpatterns
+
+
+class ContextPathTestCase(TestCase):
+
+    def setUp(self):
+        self.siteroot_urls = importlib.import_module('siteroot.urls')
+
+    @override_settings(LD_CONTEXT_PATH=None)
+    def tearDown(self):
+        importlib.reload(self.siteroot_urls)
+
+    @override_settings(LD_CONTEXT_PATH='linkding/')
+    def test_route_with_context_path(self):
+        module = importlib.reload(self.siteroot_urls)
+        # pass mock config instead of actual module to prevent caching the
+        # url config in django.urls.reverse
+        urlconf = MockUrlConf(module)
+        test_cases = [
+            ('bookmarks:index', '/linkding/bookmarks'),
+            ('bookmarks:bookmark-list', '/linkding/api/bookmarks/'),
+            ('login', '/linkding/login/'),
+            ('admin:bookmarks_bookmark_changelist', '/linkding/admin/bookmarks/bookmark/'),
+        ]
+
+        for url_name, expected_url in test_cases:
+            url = reverse(url_name, urlconf=urlconf)
+            self.assertEqual(expected_url, url)
+
+    @override_settings(LD_CONTEXT_PATH='')
+    def test_route_without_context_path(self):
+        module = importlib.reload(self.siteroot_urls)
+        # pass mock config instead of actual module to prevent caching the
+        # url config in django.urls.reverse
+        urlconf = MockUrlConf(module)
+        test_cases = [
+            ('bookmarks:index', '/bookmarks'),
+            ('bookmarks:bookmark-list', '/api/bookmarks/'),
+            ('login', '/login/'),
+            ('admin:bookmarks_bookmark_changelist', '/admin/bookmarks/bookmark/'),
+        ]
+
+        for url_name, expected_url in test_cases:
+            url = reverse(url_name, urlconf=urlconf)
+            self.assertEqual(expected_url, url)