update

Author: namchuai

engine/utils/huggingface_utils.h

@@ -30,6 +30,9 @@ struct HuggingFaceGgufInfo {
 
   static cpp::result<HuggingFaceGgufInfo, std::string> FromJson(
       const Json::Value& json) {
+    if (json.isNull() || json.type() == Json::ValueType::nullValue) {
+      return cpp::fail("gguf info is null");
+    }
     try {
       return HuggingFaceGgufInfo{
           .total = json["total"].asUInt64(),
@@ -39,6 +42,13 @@ struct HuggingFaceGgufInfo {
       return cpp::fail("Failed to parse gguf info: " + std::string(e.what()));
     }
   }
+
+  Json::Value ToJson() {
+    Json::Value root;
+    root["total"] = total;
+    root["architecture"] = architecture;
+    return root;
+  }
 };
 
 struct HuggingFaceModelRepoInfo {
@@ -98,6 +108,12 @@ struct HuggingFaceModelRepoInfo {
         .createdAt = body["createdAt"].asString(),
     };
   }
+
+  Json::Value ToJson() {
+    Json::Value root;
+    root["gguf"] = gguf->ToJson();
+    return root;
+  }
 };
 
 inline std::optional<std::string> GetHuggingFaceToken() {