more WIP savemanager

5 files changed, 159 insertions, 13 deletions

diff --git a/src/crepe/api/CMakeLists.txt b/src/crepe/api/CMakeLists.txt
index 97bc6b1..abc96ab 100644
--- a/src/crepe/api/CMakeLists.txt
+++ b/src/crepe/api/CMakeLists.txt
@@ -30,5 +30,4 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	AssetManager.h 
 	AssetManager.hpp
 	SaveManager.h
-	SaveManager.hpp
 )
diff --git a/src/crepe/api/Config.h b/src/crepe/api/Config.h
index 8a7f268..aef4d54 100644
--- a/src/crepe/api/Config.h
+++ b/src/crepe/api/Config.h
@@ -35,6 +35,11 @@ public:
 		 */
 		bool color = true;
 	} log;
+
+	//! Save manager
+	struct {
+		std::string location = "save.crepe.db";
+	} savemgr;
 };
 
 } // namespace crepe::api
diff --git a/src/crepe/api/SaveManager.cpp b/src/crepe/api/SaveManager.cpp
index 83ff0fa..87e634b 100644
--- a/src/crepe/api/SaveManager.cpp
+++ b/src/crepe/api/SaveManager.cpp
@@ -1,15 +1,80 @@
 #include "../DB.h"
-#include "util/log.h"
+#include "../util/log.h"
 
+#include "Config.h"
+#include "ValueBroker.h"
 #include "SaveManager.h"
 
 using namespace std;
 using namespace crepe;
 using namespace crepe::api;
 
+template <>
+string SaveManager::serialize(const string & value) {
+	return value;
+}
+template <typename T>
+string SaveManager::serialize(const T & value) {
+	return to_string(value);
+}
+template string SaveManager::serialize(const uint8_t &);
+template string SaveManager::serialize(const int8_t &);
+template string SaveManager::serialize(const uint16_t &);
+template string SaveManager::serialize(const int16_t &);
+template string SaveManager::serialize(const uint32_t &);
+template string SaveManager::serialize(const int32_t &);
+template string SaveManager::serialize(const uint64_t &);
+template string SaveManager::serialize(const int64_t &);
+template string SaveManager::serialize(const float &);
+template string SaveManager::serialize(const double &);
+
+template <>
+uint64_t SaveManager::deserialize(const string & value) {
+	try {
+		return stoul(value);
+	} catch (std::invalid_argument &) {
+		return 0;
+	}
+}
+template <>
+int64_t SaveManager::deserialize(const string & value) {
+	try {
+		return stol(value);
+	} catch (std::invalid_argument &) {
+		return 0;
+	}
+}
+template <>
+float SaveManager::deserialize(const string & value) {
+	try {
+		return stof(value);
+	} catch (std::invalid_argument &) {
+		return 0;
+	}
+	return stof(value);
+}
+template <>
+double SaveManager::deserialize(const string & value) {
+	try {
+		return stod(value);
+	} catch (std::invalid_argument &) {
+		return 0;
+	}
+}
+template <>
+string SaveManager::deserialize(const string & value) {
+	return value;
+}
+
+template <> uint8_t SaveManager::deserialize(const string & value) { return deserialize<uint64_t>(value); }
+template <> int8_t SaveManager::deserialize(const string & value) { return deserialize<int64_t>(value); }
+template <> uint16_t SaveManager::deserialize(const string & value) { return deserialize<uint64_t>(value); }
+template <> int16_t SaveManager::deserialize(const string & value) { return deserialize<int64_t>(value); }
+template <> uint32_t SaveManager::deserialize(const string & value) { return deserialize<uint64_t>(value); }
+template <> int32_t SaveManager::deserialize(const string & value) { return deserialize<int64_t>(value); }
+
 SaveManager::SaveManager() {
 	dbg_trace();
-	this->db = make_unique<DB>("./save.crepe.db");
 }
 
 SaveManager & SaveManager::get_instance() {
@@ -18,3 +83,78 @@ SaveManager & SaveManager::get_instance() {
 	return instance;
 }
 
+DB & SaveManager::get_db() {
+	Config & cfg = Config::get_instance();
+	// TODO: make this path relative to XDG_DATA_HOME on Linux and whatever the
+	// default equivalent is on Windows using some third party library
+	static DB db(cfg.savemgr.location);
+	return db;
+}
+
+bool SaveManager::has(const string & key) {
+	DB & db = this->get_db();
+	return db.has(key);
+}
+
+template <>
+void SaveManager::set(const string & key, const string & value) {
+	DB & db = this->get_db();
+	db.set(key, value);
+}
+template <typename T>
+void SaveManager::set(const string & key, const T & value) {
+	DB & db = this->get_db();
+	db.set(key, std::to_string(value));
+}
+template void SaveManager::set(const string &, const uint8_t &);
+template void SaveManager::set(const string &, const int8_t &);
+template void SaveManager::set(const string &, const uint16_t &);
+template void SaveManager::set(const string &, const int16_t &);
+template void SaveManager::set(const string &, const uint32_t &);
+template void SaveManager::set(const string &, const int32_t &);
+template void SaveManager::set(const string &, const uint64_t &);
+template void SaveManager::set(const string &, const int64_t &);
+template void SaveManager::set(const string &, const float &);
+template void SaveManager::set(const string &, const double &);
+
+template <typename T>
+ValueBroker<T> SaveManager::get(const string & key, const T & default_value) {
+	if (!this->has(key))
+		this->set<T>(key, default_value);
+	return this->get<T>(key);
+}
+template ValueBroker<uint8_t> SaveManager::get(const string &, const uint8_t &);
+template ValueBroker<int8_t> SaveManager::get(const string &, const int8_t &);
+template ValueBroker<uint16_t> SaveManager::get(const string &, const uint16_t &);
+template ValueBroker<int16_t> SaveManager::get(const string &, const int16_t &);
+template ValueBroker<uint32_t> SaveManager::get(const string &, const uint32_t &);
+template ValueBroker<int32_t> SaveManager::get(const string &, const int32_t &);
+template ValueBroker<uint64_t> SaveManager::get(const string &, const uint64_t &);
+template ValueBroker<int64_t> SaveManager::get(const string &, const int64_t &);
+template ValueBroker<float> SaveManager::get(const string &, const float &);
+template ValueBroker<double> SaveManager::get(const string &, const double &);
+template ValueBroker<string> SaveManager::get(const string &, const string &);
+
+template <typename T>
+ValueBroker<T> SaveManager::get(const string & key) {
+	T value;
+	return {
+		[this, key] (const T & target) { this->set<T>(key, target); },
+		[this, key, value] () mutable -> const T & {
+			value = this->deserialize<T>(this->get_db().get(key));
+			return value;
+		},
+	};
+}
+template ValueBroker<uint8_t> SaveManager::get(const string &);
+template ValueBroker<int8_t> SaveManager::get(const string &);
+template ValueBroker<uint16_t> SaveManager::get(const string &);
+template ValueBroker<int16_t> SaveManager::get(const string &);
+template ValueBroker<uint32_t> SaveManager::get(const string &);
+template ValueBroker<int32_t> SaveManager::get(const string &);
+template ValueBroker<uint64_t> SaveManager::get(const string &);
+template ValueBroker<int64_t> SaveManager::get(const string &);
+template ValueBroker<float> SaveManager::get(const string &);
+template ValueBroker<double> SaveManager::get(const string &);
+template ValueBroker<string> SaveManager::get(const string &);
+
diff --git a/src/crepe/api/SaveManager.h b/src/crepe/api/SaveManager.h
index 110735d..a1f239d 100644
--- a/src/crepe/api/SaveManager.h
+++ b/src/crepe/api/SaveManager.h
@@ -14,23 +14,30 @@ class SaveManager {
 public:
 	//! Get a reference to a value and initialize it with a value if it does not yet exist
 	template <typename T>
-	ValueBroker<T> & get(const char * key, const T & default_value);
+	ValueBroker<T> get(const std::string & key, const T & default_value);
 
 	//! Get a reference to a value
 	template <typename T>
-	ValueBroker<T> & get(const char * key);
+	ValueBroker<T> get(const std::string & key);
 
 	//! Set a value directly
 	template <typename T>
-	void set(const char * key, const T & value);
+	void set(const std::string & key, const T & value);
 
 	//! Check if the save file has a value for this \c key
-	bool has(const char * key);
+	bool has(const std::string & key);
 
 private:
 	SaveManager();
 	virtual ~SaveManager() = default;
 
+private:
+	template <typename T>
+	std::string serialize(const T &);
+
+	template <typename T>
+	T deserialize(const std::string &);
+
 public:
 	// singleton
 	static SaveManager & get_instance();
@@ -40,9 +47,8 @@ public:
 	SaveManager & operator = (SaveManager &&) = delete;
 
 private:
-	std::unique_ptr<DB> db = nullptr;
+	static DB & get_db();
 };
 
 }
 
-#include "SaveManager.hpp"
diff --git a/src/crepe/api/SaveManager.hpp b/src/crepe/api/SaveManager.hpp
deleted file mode 100644
index 44f58ed..0000000
--- a/src/crepe/api/SaveManager.hpp
+++ /dev/null
@@ -1,4 +0,0 @@
-#pragma once
-
-#include "SaveManager.h"
-