Add Visible modes function from Organisation to Users too (#16069)

You can limit or hide organisations. This pull make it also posible for users

- new strings to translte
- add checkbox to user profile form
- add checkbox to admin user.edit form
- filter explore page user search
- filter api admin and public user searches
- allow admins view "hidden" users
- add app option DEFAULT_USER_VISIBILITY
- rewrite many files to use Visibility field
- check for teams intersection
- fix context output
- right fake 404 if not visible

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Andrew Thornton <art27@cantab.net>

integrations/api_user_search_test.go

@@ -59,3 +59,34 @@ func TestAPIUserSearchNotLoggedIn(t *testing.T) {
 		}
 	}
 }
+
+func TestAPIUserSearchAdminLoggedInUserHidden(t *testing.T) {
+	defer prepareTestEnv(t)()
+	adminUsername := "user1"
+	session := loginUser(t, adminUsername)
+	token := getTokenForLoggedInUser(t, session)
+	query := "user31"
+	req := NewRequestf(t, "GET", "/api/v1/users/search?token=%s&q=%s", token, query)
+	req.SetBasicAuth(token, "x-oauth-basic")
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	var results SearchResults
+	DecodeJSON(t, resp, &results)
+	assert.NotEmpty(t, results.Data)
+	for _, user := range results.Data {
+		assert.Contains(t, user.UserName, query)
+		assert.NotEmpty(t, user.Email)
+		assert.EqualValues(t, "private", user.Visibility)
+	}
+}
+
+func TestAPIUserSearchNotLoggedInUserHidden(t *testing.T) {
+	defer prepareTestEnv(t)()
+	query := "user31"
+	req := NewRequestf(t, "GET", "/api/v1/users/search?q=%s", query)
+	resp := MakeRequest(t, req, http.StatusOK)
+
+	var results SearchResults
+	DecodeJSON(t, resp, &results)
+	assert.Empty(t, results.Data)
+}