feat: add im group mention flows

server/im_http_test.go

@@ -821,6 +821,53 @@ func TestServeIMMessageReceipts(t *testing.T) {
 	}
 }
 
+func TestServeIMGroupMembers(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	expectIMBearer(t, ctrl, "token-1", 7, 42)
+	oldSubs := store.Subs
+	oldTopics := store.Topics
+	subs := mock_store.NewMockSubsPersistenceInterface(ctrl)
+	topics := mock_store.NewMockTopicsPersistenceInterface(ctrl)
+	store.Subs = subs
+	store.Topics = topics
+	defer func() {
+		store.Subs = oldSubs
+		store.Topics = oldTopics
+	}()
+
+	subs.EXPECT().Get(types.TenantID(7), "grpMention", types.Uid(42), false).Return(&types.Subscription{
+		TenantID:  7,
+		User:      types.Uid(42).String(),
+		Topic:     "grpMention",
+		ModeWant:  types.ModeCFull,
+		ModeGiven: types.ModeCFull,
+	}, nil)
+	alice := types.Subscription{User: types.Uid(101).UserId(), ModeWant: types.ModeCPublic, ModeGiven: types.ModeCPublic}
+	alice.SetPublic(map[string]any{"display_name": "Alice"})
+	bob := types.Subscription{User: types.Uid(102).UserId(), ModeWant: types.ModeJoin, ModeGiven: types.ModeJoin}
+	bob.SetPublic(map[string]any{"display_name": "Bob"})
+	topics.EXPECT().GetUsers(types.TenantID(7), "grpMention", gomock.Any()).Return([]types.Subscription{alice, bob}, nil)
+
+	req := httptest.NewRequest(http.MethodGet, "/v1/im/groups/grpMention/members?query=ali&mentionable=true", nil)
+	req.Header.Set("Authorization", "Bearer token-1")
+	rec := httptest.NewRecorder()
+
+	serveIMGroupResource(rec, req)
+
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status: got %d, want %d; body=%s", rec.Code, http.StatusOK, rec.Body.String())
+	}
+	data := decodeIMHTTPResponse(t, rec).Data.(map[string]any)
+	items := data["items"].([]any)
+	if len(items) != 1 || items[0].(map[string]any)["display_name"] != "Alice" || items[0].(map[string]any)["mentionable"] != true {
+		t.Fatalf("unexpected members response: %#v", data)
+	}
+	if data["permissions"].(map[string]any)["can_mention_all"] != true {
+		t.Fatalf("expected can_mention_all permission: %#v", data)
+	}
+}
+
 func TestServeIMMessageRecall(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()