feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/infra/impl/document/searchstore/milvus/convert.go

@@ -0,0 +1,119 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package milvus
+
+import (
+	"fmt"
+
+	"github.com/milvus-io/milvus/client/v2/entity"
+
+	"github.com/coze-dev/coze-studio/backend/infra/contract/document/searchstore"
+	"github.com/coze-dev/coze-studio/backend/pkg/lang/slices"
+)
+
+func denseFieldName(name string) string {
+	return fmt.Sprintf("dense_%s", name)
+}
+
+func denseIndexName(name string) string {
+	return fmt.Sprintf("index_dense_%s", name)
+}
+
+func sparseFieldName(name string) string {
+	return fmt.Sprintf("sparse_%s", name)
+}
+
+func sparseIndexName(name string) string {
+	return fmt.Sprintf("index_sparse_%s", name)
+}
+
+func convertFieldType(typ searchstore.FieldType) (entity.FieldType, error) {
+	switch typ {
+	case searchstore.FieldTypeInt64:
+		return entity.FieldTypeInt64, nil
+	case searchstore.FieldTypeText:
+		return entity.FieldTypeVarChar, nil
+	case searchstore.FieldTypeDenseVector:
+		return entity.FieldTypeFloatVector, nil
+	case searchstore.FieldTypeSparseVector:
+		return entity.FieldTypeSparseVector, nil
+	default:
+		return entity.FieldTypeNone, fmt.Errorf("[convertFieldType] unknown field type: %v", typ)
+	}
+}
+
+func convertDense(dense [][]float64) [][]float32 {
+	return slices.Transform(dense, func(a []float64) []float32 {
+		r := make([]float32, len(a))
+		for i := 0; i < len(a); i++ {
+			r[i] = float32(a[i])
+		}
+		return r
+	})
+}
+
+func convertMilvusDenseVector(dense [][]float64) []entity.Vector {
+	return slices.Transform(dense, func(a []float64) entity.Vector {
+		r := make([]float32, len(a))
+		for i := 0; i < len(a); i++ {
+			r[i] = float32(a[i])
+		}
+		return entity.FloatVector(r)
+	})
+}
+
+func convertSparse(sparse []map[int]float64) ([]entity.SparseEmbedding, error) {
+	r := make([]entity.SparseEmbedding, 0, len(sparse))
+	for _, s := range sparse {
+		ks := make([]uint32, 0, len(s))
+		vs := make([]float32, 0, len(s))
+		for k, v := range s {
+			ks = append(ks, uint32(k))
+			vs = append(vs, float32(v))
+		}
+
+		se, err := entity.NewSliceSparseEmbedding(ks, vs)
+		if err != nil {
+			return nil, err
+		}
+
+		r = append(r, se)
+	}
+
+	return r, nil
+}
+
+func convertMilvusSparseVector(sparse []map[int]float64) ([]entity.Vector, error) {
+	r := make([]entity.Vector, 0, len(sparse))
+	for _, s := range sparse {
+		ks := make([]uint32, 0, len(s))
+		vs := make([]float32, 0, len(s))
+		for k, v := range s {
+			ks = append(ks, uint32(k))
+			vs = append(vs, float32(v))
+		}
+
+		se, err := entity.NewSliceSparseEmbedding(ks, vs)
+		if err != nil {
+			return nil, err
+		}
+
+		r = append(r, se)
+	}
+
+	return r, nil
+}