aboutsummaryrefslogtreecommitdiff
path: root/src/crepe/manager/SaveManager.h
diff options
context:
space:
mode:
authorWBoerenkamps <wrj.boerenkamps@student.avans.nl>2024-12-04 21:50:45 +0100
committerWBoerenkamps <wrj.boerenkamps@student.avans.nl>2024-12-04 21:50:45 +0100
commitd941f497c10bb9146bb83c5c4e59e844d0641a04 (patch)
tree7dfdf691175caf8e43a9c7a7e07a1cdd6bfed0ff /src/crepe/manager/SaveManager.h
parentd10f220ff6c5d62bb51793a0ef4ee37090161d89 (diff)
parentcfb67ffddb9f4bb0357c2b9df4239bfee7364c5a (diff)
merge master
Diffstat (limited to 'src/crepe/manager/SaveManager.h')
-rw-r--r--src/crepe/manager/SaveManager.h114
1 files changed, 114 insertions, 0 deletions
diff --git a/src/crepe/manager/SaveManager.h b/src/crepe/manager/SaveManager.h
new file mode 100644
index 0000000..3d8c852
--- /dev/null
+++ b/src/crepe/manager/SaveManager.h
@@ -0,0 +1,114 @@
+#pragma once
+
+#include <memory>
+
+#include "../ValueBroker.h"
+
+namespace crepe {
+
+class DB;
+
+/**
+ * \brief Save data manager
+ *
+ * This class provides access to a simple key-value store that stores
+ * - integers (8-64 bit, signed or unsigned)
+ * - real numbers (float or double)
+ * - string (std::string)
+ *
+ * The underlying database is a key-value store.
+ */
+class SaveManager {
+public:
+ /**
+ * \brief Get a read/write reference to a value and initialize it if it does not yet exist
+ *
+ * \param key The value key
+ * \param default_value Value to initialize \c key with if it does not already exist in the
+ * database
+ *
+ * \return Read/write reference to the value
+ */
+ template <typename T>
+ ValueBroker<T> get(const std::string & key, const T & default_value);
+
+ /**
+ * \brief Get a read/write reference to a value
+ *
+ * \param key The value key
+ *
+ * \return Read/write reference to the value
+ *
+ * \note Attempting to read this value before it is initialized (i.e. set) will result in an
+ * exception
+ */
+ template <typename T>
+ ValueBroker<T> get(const std::string & key);
+
+ /**
+ * \brief Set a value directly
+ *
+ * \param key The value key
+ * \param value The value to store
+ */
+ template <typename T>
+ void set(const std::string & key, const T & value);
+
+ /**
+ * \brief Check if the save file has a value for this \c key
+ *
+ * \param key The value key
+ *
+ * \returns True if the key exists, or false if it does not
+ */
+ bool has(const std::string & key);
+
+private:
+ SaveManager();
+ virtual ~SaveManager() = default;
+
+private:
+ /**
+ * \brief Serialize an arbitrary value to STL string
+ *
+ * \tparam T Type of arbitrary value
+ *
+ * \returns String representation of value
+ */
+ template <typename T>
+ std::string serialize(const T &) const noexcept;
+
+ /**
+ * \brief Deserialize an STL string back to type \c T
+ *
+ * \tparam T Type of value
+ * \param value Serialized value
+ *
+ * \returns Deserialized value
+ */
+ template <typename T>
+ T deserialize(const std::string & value) const noexcept;
+
+public:
+ // singleton
+ static SaveManager & get_instance();
+ SaveManager(const SaveManager &) = delete;
+ SaveManager(SaveManager &&) = delete;
+ SaveManager & operator=(const SaveManager &) = delete;
+ SaveManager & operator=(SaveManager &&) = delete;
+
+private:
+ /**
+ * \brief Create an instance of DB and return its reference
+ *
+ * \returns DB instance
+ *
+ * This function exists because DB is a facade class, which can't directly be used in the API
+ * without workarounds
+ *
+ * TODO: better solution
+ */
+ static DB & get_db();
+};
+
+} // namespace crepe