feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/domain/workflow/internal/nodes/knowledge/knowledge_retrieve.go

@@ -0,0 +1,87 @@
+/*
+ * 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 knowledge
+
+import (
+	"context"
+	"errors"
+
+	"github.com/coze-dev/coze-studio/backend/domain/workflow/crossdomain/knowledge"
+	"github.com/coze-dev/coze-studio/backend/pkg/lang/slices"
+)
+
+const outputList = "outputList"
+
+type RetrieveConfig struct {
+	KnowledgeIDs      []int64
+	RetrievalStrategy *knowledge.RetrievalStrategy
+	Retriever         knowledge.KnowledgeOperator
+}
+
+type KnowledgeRetrieve struct {
+	config *RetrieveConfig
+}
+
+func NewKnowledgeRetrieve(_ context.Context, cfg *RetrieveConfig) (*KnowledgeRetrieve, error) {
+	if cfg == nil {
+		return nil, errors.New("cfg is required")
+	}
+
+	if cfg.Retriever == nil {
+		return nil, errors.New("retriever is required")
+	}
+
+	if len(cfg.KnowledgeIDs) == 0 {
+		return nil, errors.New("knowledgeI ids is required")
+	}
+
+	if cfg.RetrievalStrategy == nil {
+		return nil, errors.New("retrieval strategy is required")
+	}
+
+	return &KnowledgeRetrieve{
+		config: cfg,
+	}, nil
+}
+
+func (kr *KnowledgeRetrieve) Retrieve(ctx context.Context, input map[string]any) (map[string]any, error) {
+
+	query, ok := input["Query"].(string)
+	if !ok {
+		return nil, errors.New("capital query key is required")
+	}
+
+	req := &knowledge.RetrieveRequest{
+		Query:             query,
+		KnowledgeIDs:      kr.config.KnowledgeIDs,
+		RetrievalStrategy: kr.config.RetrievalStrategy,
+	}
+
+	response, err := kr.config.Retriever.Retrieve(ctx, req)
+	if err != nil {
+		return nil, err
+	}
+	result := make(map[string]any)
+	result[outputList] = slices.Transform(response.Slices, func(m *knowledge.Slice) any {
+		return map[string]any{
+			"documentId": m.DocumentID,
+			"output":     m.Output,
+		}
+	})
+
+	return result, nil
+}