work on rule reqmod resmod codegen for serialization

proxychain/ruleset/rule.go

@@ -0,0 +1,49 @@
+package ruleset_v2
+
+import (
+	"encoding/json"
+	"fmt"
+	"ladder/proxychain"
+)
+
+type Rule struct {
+	Domains               []string
+	RequestModifications  []proxychain.RequestModification
+	ResponseModifications []proxychain.ResponseModification
+}
+
+// implement type encoding/json/Marshaler
+func (rule *Rule) UnmarshalJSON(data []byte) error {
+	type Aux struct {
+		Domains               []string `json:"domains"`
+		RequestModifications  []string `json:"request_modifications"`
+		ResponseModifications []string `json:"response_modifications"`
+	}
+
+	aux := &Aux{}
+	if err := json.Unmarshal(data, aux); err != nil {
+		return err
+	}
+
+	//fmt.Println(aux.Domains)
+	rule.Domains = aux.Domains
+
+	// convert requestModification function call string into actual functional option
+	for _, resModStr := range aux.RequestModifications {
+		name, params, err := parseFuncCall(resModStr)
+		if err != nil {
+			return fmt.Errorf("Rule::UnmarshalJSON invalid function call syntax => '%s'", err)
+		}
+		f, exists := resModMap[name]
+		if !exists {
+			return fmt.Errorf("Rule::UnmarshalJSON => requestModifier '%s' does not exist, please check spelling", err)
+		}
+		rule.ResponseModifications = append(rule.ResponseModifications, f(params...))
+	}
+
+	return nil
+}
+
+func (r *Rule) MarshalJSON() ([]byte, error) {
+	return []byte{}, nil
+}