1 files changed, 26 insertions, 0 deletions
diff --git a/include/book_store/purchase_error.hh b/include/book_store/purchase_error.hh
new file mode 100644
index 0000000..718ca46
--- /dev/null
+++ b/include/book_store/purchase_error.hh
@@ -0,0 +1,26 @@
+#ifndef PURCHASE_ERROR_HH
+#define PURCHASE_ERROR_HH
+
+#include <string_view>
+
+namespace book_store {
+class purchase_error {
+public:
+  enum purchase_error_type {
+    person_not_found,
+    book_not_found,
+    not_enough_stock,
+  };
+
+private:
+  purchase_error_type _error;
+
+public:
+  purchase_error(purchase_error_type error) : _error(error) {}
+
+  [[nodiscard]] auto error() const noexcept -> purchase_error_type;
+  [[nodiscard]] auto what() const noexcept -> std::string_view;
+};
+} // namespace book_store
+
+#endif // PURCHASE_ERROR_HH