From 9ca1e8784f947ff12eaefb7192c39e9be1a6b514 Mon Sep 17 00:00:00 2001
From: Mars Ultor <krishna@ayyalasomayajula.net>
Date: Thu, 18 Dec 2025 15:45:43 -0600
Subject: [PATCH] finished database layer

---
 src/main.cpp  |  5 +++++
 src/types.cpp | 18 ++++++++++++++++++
 src/types.hpp |  6 ++++++
 3 files changed, 29 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index c351489..76c0e23 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,6 +2,7 @@
 #include "nlohmann/json_fwd.hpp"
 #include "skwyward-api-utils.hpp"
 #include "spdlog/spdlog.h"
+#include "types.hpp"
 #include <exception>
 #include <memory>
 #include <sodium.h>
@@ -38,6 +39,10 @@ int main (int argc, char *argv[]) {
 
   std::shared_ptr<clickhouse::Client> client_shared_ptr = std::make_shared<clickhouse::Client>(clickhouse::ClientOptions().SetHost(clickhouse_host_name).SetPassword(clickhouse_password).SetUser(clickhouse_username).SetDefaultDatabase(clickhouse_schema));
 
+  database_utils::register_user(client_shared_ptr, test_username, test_password);
+  
+  spdlog::info("USER UUID: {}", database_utils::uuid_to_string( database_utils::get_user_uuid(client_shared_ptr, test_username).value() ));
+
   spdlog::info("Connected to the database");
 
   return 0;
diff --git a/src/types.cpp b/src/types.cpp
index 780e095..719224c 100644
--- a/src/types.cpp
+++ b/src/types.cpp
@@ -185,5 +185,23 @@ void insert_grade_updates(
 }
 
 
+std::optional<clickhouse::UUID> get_user_uuid(const CHClient& client, const std::string& username) {
+    std::optional<clickhouse::UUID> result;
+
+    client->Select(
+        "SELECT user_id FROM users WHERE username = '" + username + "' LIMIT 1",
+        [&](const clickhouse::Block& b) {
+            if (b.GetRowCount() == 0)
+                return;
+
+            auto col_uuid = b[0]->As<clickhouse::ColumnUUID>();
+            auto uuid_val = col_uuid->At(0);
+            result = uuid_val;  // your helper that converts UUID pair → string
+        }
+    );
+
+    return result;
+}
+
 } // namespace database_utils
 
diff --git a/src/types.hpp b/src/types.hpp
index 3a1d093..0e7d9c2 100644
--- a/src/types.hpp
+++ b/src/types.hpp
@@ -6,10 +6,14 @@
 #include <vector>
 
 #include <clickhouse/client.h>
+#include "clickhouse/base/uuid.h"
 #include "skwyward-api-utils.hpp"
 
 namespace database_utils {
 
+clickhouse::UUID parse_uuid(const std::string& str);
+std::string uuid_to_string(const clickhouse::UUID& u);
+
 // ---------- DB Handle ----------
 
 using CHClient = std::shared_ptr<clickhouse::Client>;
@@ -93,5 +97,7 @@ insert_grade_updates(
     const std::vector<AssignmentDiff>& diffs
 );
 
+std::optional<clickhouse::UUID> get_user_uuid(const CHClient& client, const std::string& username);
+
 } // namespace database_utils