feat(coperator): 添加逻辑运算符支持

- 在 operatorMap 中添加 $and、$or 和 $nor 运算符
- 新增 logic.go 文件实现逻辑运算符的功能
- operatorAnd: 所有子过滤器都必须匹配
- operatorOr: 任意一个子过滤器匹配即可
- operatorNor: 所有子过滤器都不匹配

coperator.go

@@ -159,4 +159,7 @@ func init() {
 	operatorMap["$ne"] = operatorNe
 	operatorMap["$in"] = operatorIn
 	operatorMap["$nin"] = operatorNotIn
+	operatorMap["$and"] = operatorAnd
+	operatorMap["$or"] = operatorOr
+	operatorMap["$nor"] = operatorNor
 }

logic.go

@@ -0,0 +1,51 @@
+package coperator
+
+import "errors"
+
+func operatorAnd(doc *Document, filter Filter, key string, value interface{}) (bool, error) {
+	vfilter, ok := filter.([]interface{})
+	if !ok {
+		return false, errors.New("filter must be a slice")
+	}
+	for _, v := range vfilter {
+		ret, err := DocumentOperator(doc, v.(Filter), "", nil)
+		if !ret {
+			return ret, err
+		}
+	}
+	return true, nil
+}
+
+func operatorOr(doc *Document, filter Filter, key string, value interface{}) (bool, error) {
+	vfilter, ok := filter.([]interface{})
+	if !ok {
+		return false, errors.New("filter must be a slice")
+	}
+	for _, v := range vfilter {
+		ret, err := DocumentOperator(doc, v.(Filter), "", nil)
+		if err != nil {
+			return false, err
+		}
+		if ret {
+			return ret, err
+		}
+	}
+	return false, nil
+}
+
+func operatorNor(doc *Document, filter Filter, key string, value interface{}) (bool, error) {
+	vfilter, ok := filter.([]interface{})
+	if !ok {
+		return false, errors.New("filter must be a slice")
+	}
+	for _, v := range vfilter {
+		ret, err := DocumentOperator(doc, v.(Filter), "", nil)
+		if err != nil {
+			return false, err
+		}
+		if ret {
+			return false, nil
+		}
+	}
+	return true, nil
+}