fix(daemon): handle invalid notice types in filter

internals/daemon/api_notices.go

@@ -53,6 +53,11 @@ func v1GetNotices(c *Command, r *http.Request, _ *UserState) Response {
 		}
 		types = append(types, noticeType)
 	}
+	if len(types) == 0 && len(typeStrs) > 0 {
+		// Caller did provide a types filter, but they're all invalid notice types.
+		// Return no notices, rather than the default of all notices.
+		return SyncResponse([]*state.Notice{})
+	}
 
 	keys := strutil.MultiCommaSeparatedList(query["keys"])
 

internals/daemon/api_notices_test.go

@@ -165,6 +165,46 @@ func (s *apiSuite) TestNoticesFilterMultipleKeys(c *C) {
 	c.Assert(n["key"], Equals, "danger")
 }
 
+func (s *apiSuite) TestNoticesFilterInvalidTypes(c *C) {
+	s.daemon(c)
+
+	st := s.d.Overlord().State()
+	st.Lock()
+	addNotice(c, st, state.ChangeUpdateNotice, "123", nil)
+	addNotice(c, st, state.WarningNotice, "danger", nil)
+	st.Unlock()
+
+	// Check that invalid types are discarded, and notices with remaining
+	// types are requested as expected, without error.
+	req, err := http.NewRequest("GET", "/v1/notices?types=foo&types=warning&types=bar,baz", nil)
+	c.Assert(err, IsNil)
+	noticesCmd := apiCmd("/v1/notices")
+	rsp, ok := noticesCmd.GET(noticesCmd, req, nil).(*resp)
+	c.Assert(ok, Equals, true)
+
+	c.Check(rsp.Type, Equals, ResponseTypeSync)
+	c.Check(rsp.Status, Equals, http.StatusOK)
+	notices, ok := rsp.Result.([]*state.Notice)
+	c.Assert(ok, Equals, true)
+	c.Assert(notices, HasLen, 1)
+	n := noticeToMap(c, notices[0])
+	c.Assert(n["type"], Equals, "warning")
+
+	// Check that if all types are invalid, no notices are returned, and there
+	// is no error.
+	req, err = http.NewRequest("GET", "/v1/notices?types=foo&types=bar,baz", nil)
+	c.Assert(err, IsNil)
+	noticesCmd = apiCmd("/v1/notices")
+	rsp, ok = noticesCmd.GET(noticesCmd, req, nil).(*resp)
+	c.Assert(ok, Equals, true)
+
+	c.Check(rsp.Type, Equals, ResponseTypeSync)
+	c.Check(rsp.Status, Equals, http.StatusOK)
+	notices, ok = rsp.Result.([]*state.Notice)
+	c.Assert(ok, Equals, true)
+	c.Assert(notices, HasLen, 0)
+}
+
 func (s *apiSuite) TestNoticesWait(c *C) {
 	s.daemon(c)