From 973aec43ea54bbf95b64fbcb636403401d1ca60e Mon Sep 17 00:00:00 2001
From: Rutger Broekhoff
Date: Fri, 28 Aug 2026 18:03:05 +0200
Subject: Import from e4b104792206ee7ea64bf39c6b7d2c0c230f9d14

---
 server/src/problem.cppm | 60 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 server/src/problem.cppm

(limited to 'server/src/problem.cppm')

diff --git a/server/src/problem.cppm b/server/src/problem.cppm
new file mode 100644
index 0000000..8764962
--- /dev/null
+++ b/server/src/problem.cppm
@@ -0,0 +1,60 @@
+module;
+
+#include <boost/beast/http/message.hpp>
+#include <boost/json.hpp>
+#include <boost/locale/message.hpp>
+
+export module routemon:problem;
+
+import std;
+import :locale;
+
+namespace http = boost::beast::http;
+namespace json = boost::json;
+
+namespace routemon::problem {
+
+  export struct details {
+    http::status status;
+    blocale::message title;
+    std::string_view type_uri;
+    std::optional<blocale::message> detail = std::nullopt;
+    std::optional<std::string> instance = std::nullopt;
+
+    auto set_detail(blocale::message detail) -> details& {
+      this->detail = detail;
+      return *this;
+    }
+
+    auto set_instance(std::string&& instance) -> details& {
+      this->instance = instance;
+      return *this;
+    }
+    auto set_instance(std::string_view instance) -> details& {
+      this->instance = std::string{instance};
+      return *this;
+    }
+  };
+
+  export auto tag_invoke(json::value_from_tag, json::value& jv, details const& details, std::locale locale) -> void {
+    auto obj = json::object{
+      {"type",   details.type_uri},
+      {"title",  details.title.str(locale)},
+      {"status", static_cast<unsigned>(details.status)},
+    };
+    if (details.detail)   obj["detail"]   = details.detail->str(locale);
+    if (details.instance) obj["instance"] = *details.instance;
+    jv = obj;
+  }
+
+  export struct tpl {
+    http::status status;
+    blocale::message title;
+    std::string_view type_uri;
+
+    auto instantiate() const -> details {
+      return details{status, title, type_uri};
+    }
+  };
+
+}
-- 
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