From 4fa34b94ecb002cadaec66ca1fdaa6c5b879a171 Mon Sep 17 00:00:00 2001
From: "Dr. Patrick Urbanke" <patrick@getml.com>
Date: Sat, 22 Mar 2025 15:48:30 +0100
Subject: [PATCH] Began writing to_create_table(...)

---
 include/sqlgen/parsing/is_primary_key.hpp  | 24 +++++++++
 include/sqlgen/parsing/to_create_table.hpp | 59 ++++++++++++++++++++++
 2 files changed, 83 insertions(+)
 create mode 100644 include/sqlgen/parsing/is_primary_key.hpp
 create mode 100644 include/sqlgen/parsing/to_create_table.hpp

diff --git a/include/sqlgen/parsing/is_primary_key.hpp b/include/sqlgen/parsing/is_primary_key.hpp
new file mode 100644
index 0000000..a80cf0a
--- /dev/null
+++ b/include/sqlgen/parsing/is_primary_key.hpp
@@ -0,0 +1,24 @@
+#ifndef SQLGEN_PARSING_IS_PRIMARY_KEY_HPP_
+#define SQLGEN_PARSING_IS_PRIMARY_KEY_HPP_
+
+#include <type_traits>
+
+#include "../PrimaryKey.hpp"
+
+namespace sqlgen::parsing {
+
+template <class T>
+class is_primary_key;
+
+template <class T>
+class is_primary_key : public std::false_type {};
+
+template <class T>
+class is_primary_key<PrimaryKey<T>> : public std::true_type {};
+
+template <class T>
+constexpr bool is_primary_key_v = is_primary_key<std::remove_cvref_t<T>>::value;
+
+}  // namespace sqlgen::parsing
+
+#endif
diff --git a/include/sqlgen/parsing/to_create_table.hpp b/include/sqlgen/parsing/to_create_table.hpp
new file mode 100644
index 0000000..cd4a2b3
--- /dev/null
+++ b/include/sqlgen/parsing/to_create_table.hpp
@@ -0,0 +1,59 @@
+#ifndef SQLGEN_PARSING_TO_CREATE_TABLE_HPP_
+#define SQLGEN_PARSING_TO_CREATE_TABLE_HPP_
+
+#include <rfl.hpp>
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include "../dynamic/Column.hpp"
+#include "../dynamic/CreateTable.hpp"
+#include "../dynamic/Table.hpp"
+#include "../dynamic/Type.hpp"
+
+namespace sqlgen::parsing {
+
+namespace internal {
+
+template <class FieldType>
+std::string to_name() {
+  using Name = typename FieldType::Name;
+  return Name().str();
+}
+
+template <class FieldType>
+dynamic::Type to_type() {
+  // TODO
+}
+
+template <class FieldType>
+dynamic::Column to_column() {
+  return dynamic::Column{.name = to_name<FieldType>(),
+                         .type = to_type<FieldType>()};
+}
+
+template <class Fields, int... _is>
+std::vector<dynamic::Column> make_columns(std::integer_sequence<int, _is...>) {
+  return std::vector<dynamic::Column>(
+      {to_column<rfl::tuple_element_t<_is, Fields>>()...});
+}
+
+}  // namespace internal
+
+template <class T>
+  requires std::is_class_v<std::remove_cvref_t<T>> &&
+           std::is_aggregate_v<std::remove_cvref_t<T>>
+dynamic::CreateTable to_create_table() {
+  using NamedTupleType = rfl::name_tuple_t<std::remove_cvref_t<T>>;
+  using Fields = typename NamedTupleType::Fields;
+  return dynamic::CreateTable{
+      .table = dynamic::Table{.name = /*TODO*/},
+      .columns = internal::make_columns<Fields>(
+          std::make_integer_sequence<int, rfl::tuple_size_v<Fields>>),
+      .if_not_exists = true};
+}
+
+}  // namespace sqlgen::parsing
+
+#endif