K8s: Search fallback: Support tag search (#100767)

pkg/registry/apis/dashboard/legacysearcher/search_client.go

@@ -89,6 +89,36 @@ func (c *DashboardSearchClient) Search(ctx context.Context, req *resource.Resour
 			}
 		}
 	}
+
+	// if searching for tags, get those instead of the dashboards or folders
+	for facet, _ := range req.Facet {
+		if facet == resource.SEARCH_FIELD_TAGS {
+			tags, err := c.dashboardStore.GetDashboardTags(ctx, &dashboards.GetDashboardTagsQuery{
+				OrgID: user.GetOrgID(),
+			})
+			if err != nil {
+				return nil, err
+			}
+			list := &resource.ResourceSearchResponse{
+				Results: &resource.ResourceTable{},
+				Facet: map[string]*resource.ResourceSearchResponse_Facet{
+					"tags": &resource.ResourceSearchResponse_Facet{
+						Terms: []*resource.ResourceSearchResponse_TermFacet{},
+					},
+				},
+			}
+
+			for _, tag := range tags {
+				list.Facet["tags"].Terms = append(list.Facet["tags"].Terms, &resource.ResourceSearchResponse_TermFacet{
+					Term:  tag.Term,
+					Count: int64(tag.Count),
+				})
+			}
+
+			return list, nil
+		}
+	}
+
 	// handle deprecated dashboardIds query param
 	for _, field := range req.Options.Labels {
 		if field.Key == utils.LabelKeyDeprecatedInternalID {

pkg/registry/apis/dashboard/legacysearcher/search_client_test.go

@@ -92,6 +92,46 @@ func TestDashboardSearchClient_Search(t *testing.T) {
 		mockStore.AssertExpectations(t)
 	})
 
+	t.Run("Query for tags should return facet properly", func(t *testing.T) {
+		mockStore.On("GetDashboardTags", mock.Anything, &dashboards.GetDashboardTagsQuery{OrgID: 2}).Return([]*dashboards.DashboardTagCloudItem{
+			{Term: "tag1", Count: 1},
+			{Term: "tag2", Count: 5},
+		}, nil).Once()
+
+		req := &resource.ResourceSearchRequest{
+			Facet: map[string]*resource.ResourceSearchRequest_Facet{
+				"tags": {
+					Field: "tags",
+				},
+			},
+			Options: &resource.ListOptions{
+				Key: dashboardKey,
+			},
+		}
+		resp, err := client.Search(ctx, req)
+
+		require.NoError(t, err)
+		require.NotNil(t, resp)
+		require.Equal(t, &resource.ResourceSearchResponse{
+			Results: &resource.ResourceTable{},
+			Facet: map[string]*resource.ResourceSearchResponse_Facet{
+				"tags": &resource.ResourceSearchResponse_Facet{
+					Terms: []*resource.ResourceSearchResponse_TermFacet{
+						{
+							Term:  "tag1",
+							Count: 1,
+						},
+						{
+							Term:  "tag2",
+							Count: 5,
+						},
+					},
+				},
+			},
+		}, resp)
+		mockStore.AssertExpectations(t)
+	})
+
 	t.Run("Query should be set as the title, and * should be removed", func(t *testing.T) {
 		mockStore.On("FindDashboards", mock.Anything, &dashboards.FindPersistedDashboardsQuery{
 			Title:        "test",