add error messages to missing fields

include/data.hpp

@@ -8,7 +8,7 @@ class data : public json {
   fs::path &get_data_path();
   void create_data_directory();
   fs::path get_store_path();
-  bool validate(const json &);
+  json validate(const json &);
 
 public:
   data();

include/http.hpp

@@ -1,4 +1,5 @@
 #pragma once
+#include <json.hpp>
 #include <web_server.hpp>
 
 const auto header_application_data =
@@ -10,6 +11,10 @@ class response {
 public:
   static void bad_request(std::shared_ptr<HttpServer::Response> response);
   static void bad_request(std::shared_ptr<HttpsServer::Response> response);
+  static void bad_request(std::shared_ptr<HttpServer::Response> response,
+                          const json &);
+  static void bad_request(std::shared_ptr<HttpsServer::Response> response,
+                          const json &);
   static void not_found(std::shared_ptr<HttpServer::Response> response);
   static void not_found(std::shared_ptr<HttpsServer::Response> response);
 };

src/data.cpp

@@ -43,14 +43,15 @@ void data::create_data_directory() {
 fs::path data::get_store_path() { return get_data_path() / "store.json"; }
 
 json data::process(const json &input) {
-  if (!validate(input)) {
+  const auto errors = validate(input);
-    return nullptr;
+  if (errors.size() != 0) {
+    return errors;
   }
 
   return input;
 }
 
-bool data::validate(const json &input) {
+json data::validate(const json &input) {
   const std::string name = input.value("name", "");
   const std::string address = input.value("address", "");
   const std::string phone = input.value("phone", "");
@@ -59,14 +60,16 @@ bool data::validate(const json &input) {
   const std::unordered_map<std::string, std::string> strings{
       {"name", name}, {"address", address}, {"phone", phone}, {"email", email}};
 
+  json errors = json::array();
+
   for (const auto &f : strings) {
     if (f.second.size() == 0) {
-      return false;
+      errors.push_back({{f.first, "Missing name."}});
     }
     if (f.second.size() >= 255) {
-      return false;
+      errors.push_back({{f.first, "Name is to long."}});
     }
   }
 
-  return true;
+  return errors;
 }

src/http.cpp

@@ -1,5 +1,4 @@
 #include <http.hpp>
-#include <json.hpp>
 
 void response::bad_request(std::shared_ptr<HttpServer::Response> response) {
   return response->write(Status::client_error_bad_request);
@@ -9,6 +8,12 @@ void response::bad_request(std::shared_ptr<HttpsServer::Response> response) {
   return response->write(Status::client_error_bad_request);
 }
 
+void response::bad_request(std::shared_ptr<HttpServer::Response> response,
+                           const json &json) {
+  return response->write(Status::client_error_bad_request, json.dump(),
+                         {header_access_control, header_application_data});
+}
+
 void response::not_found(std::shared_ptr<HttpsServer::Response> response) {
   return response->write(Status::client_error_not_found);
 }

src/store.cpp

@@ -80,8 +80,8 @@ int Application::run() {
 
         const auto json_response = dat.process(data);
 
-        if (json_response.is_null()) {
+        if (json_response.is_array()) {
-          return response::bad_request(response);
+          return response::bad_request(response, json_response);
         }
 
         response->write(Status::success_created, json_response.dump(),