feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/infra/contract/document/searchstore/dsl.go

@@ -0,0 +1,54 @@
+/*
+ * 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 searchstore
+
+import "fmt"
+
+type DSL struct {
+	Op    Op
+	Field string
+	Value interface{} // builtin types / []*DSL
+}
+
+type Op string
+
+const (
+	OpEq   Op = "eq"
+	OpNe   Op = "ne"
+	OpLike Op = "like"
+	OpIn   Op = "in"
+
+	OpAnd Op = "and"
+	OpOr  Op = "or"
+)
+
+func (d *DSL) DSL() map[string]any {
+	return map[string]any{"dsl": d}
+}
+
+func LoadDSL(src map[string]any) (*DSL, error) {
+	if src == nil {
+		return nil, nil
+	}
+
+	dsl, ok := src["dsl"].(*DSL)
+	if !ok {
+		return nil, fmt.Errorf("load dsl failed")
+	}
+
+	return dsl, nil
+}