Merge branch 'develop'

server/character_data.hpp

@@ -30,6 +30,7 @@
 
 struct CharacterData {
 	//metadata
+	int owner;
 	std::string handle;
 	std::string avatar;
 

server/server_account_management.cpp

@@ -162,6 +162,7 @@ void ServerApplication::UnloadUserAccount(int uid) {
 	//save this user account, and then unload it
 	SaveUserAccount(uid);
 	accountMap.erase(uid);
+	//TODO: unload this account's characters?
 }
 
 void ServerApplication::DeleteUserAccount(int uid) {

server/server_application.hpp

@@ -49,6 +49,7 @@
 
 //STL
 #include <map>
+#include <string>
 
 //The main application class
 class ServerApplication {
@@ -84,6 +85,11 @@ private:
 	void DeleteUserAccount(int uid);
 
 	//TODO: character management
+	int CreateCharacter(int owner, std::string handle, std::string avatar);
+	int LoadCharacter(int owner, std::string handle, std::string avatar);
+	int SaveCharacter(int uid);
+	void UnloadCharacter(int uid);
+	void DeleteCharacter(int uid);
 
 	//TODO: combat systems
 

server/server_character_management.cpp

@@ -0,0 +1,228 @@
+/* Copyright: (c) Kayne Ruse 2014
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "server_application.hpp"
+
+#include "sqlite3/sqlite3.h"
+
+#include <stdexcept>
+
+//-------------------------
+//Define the queries
+//-------------------------
+
+static const char* CREATE_CHARACTER = "INSERT INTO PlayerCharacters (owner, handle, avatar) VALUES (?, ?, ?);";
+static const char* LOAD_CHARACTER = "SELECT * FROM PlayerCharacters WHERE handle = ?;";
+static const char* SAVE_CHARACTER = "INSERT OR REPLACE INTO PlayerCharacters (uid, owner, mapIndex, positionX, positionY) VALUES (?, ?, ?, ?, ?);";
+static const char* DELETE_CHARACTER = "DELETE FROM PlayerCharacters WHERE uid = ?;";
+
+//-------------------------
+//Define the methods
+//-------------------------
+
+int ServerApplication::CreateCharacter(int owner, std::string handle, std::string avatar) {
+	//Create the character, failing if it exists
+	sqlite3_stmt* statement = nullptr;
+
+	//prep
+	if (sqlite3_prepare_v2(database, CREATE_CHARACTER, -1, &statement, nullptr) != SQLITE_OK) {
+		throw( std::runtime_error(std::string() + "Failed to prepare an SQL statement: " + sqlite3_errmsg(database)) );
+	}
+
+	//parameters
+	bool ret = false;
+	ret |= sqlite3_bind_int(statement, 1, owner);
+	ret |= sqlite3_bind_text(statement, 2, handle.c_str(), handle.size() + 1, SQLITE_STATIC);
+	ret |= sqlite3_bind_text(statement, 3, avatar.c_str(), avatar.size() + 1, SQLITE_STATIC);
+
+	//check for binding errors
+	if (ret) {
+		throw( std::runtime_error(std::string() + "Failed to replace a prepared statement's parameter: " + sqlite3_errmsg(database)) );
+	}
+
+	//execute
+	if (sqlite3_step(statement) != SQLITE_DONE) {
+		//if this fails, than this character exists
+		sqlite3_finalize(statement);
+		return -1;
+	}
+
+	sqlite3_finalize(statement);
+
+	//load this character into memory
+	return LoadCharacter(owner, handle, avatar);
+}
+
+int ServerApplication::LoadCharacter(int owner, std::string handle, std::string avatar) {
+	//load the specified character, creating it if it doesn't exist
+	//fail if it is already loaded, or does not belong to this account
+	sqlite3_stmt* statement = nullptr;
+
+	//prep
+	if (sqlite3_prepare_v2(database, LOAD_CHARACTER, -1, &statement, nullptr) != SQLITE_OK) {
+		throw( std::runtime_error(std::string() + "Failed to prepare an SQL statement: " + sqlite3_errmsg(database)) );
+	}
+
+	//parameter
+	if (sqlite3_bind_text(statement, 1, handle.c_str(), handle.size() + 1, SQLITE_STATIC) != SQLITE_OK) {
+		throw( std::runtime_error(std::string() + "Failed to replace a prepared statement's parameter: " + sqlite3_errmsg(database)) );
+	}
+
+	//execute
+	int ret = sqlite3_step(statement);
+
+	//process the result
+	if (ret == SQLITE_ROW) {
+		//get the index
+		int uid = sqlite3_column_int(statement, 0);
+
+		//check to see if this character is already loaded
+		if (characterMap.find(uid) != characterMap.end()) {
+			sqlite3_finalize(statement);
+			return -1;
+		}
+
+		//check the owner
+		if (owner != sqlite3_column_int(statement, 1)) {
+			sqlite3_finalize(statement);
+			return -2;
+		}
+
+		//extract the data into memory
+		CharacterData& newChar = characterMap[uid];
+
+		//metadata
+		newChar.handle = reinterpret_cast<const char*>(sqlite3_column_text(statement, 2));
+		newChar.avatar = reinterpret_cast<const char*>(sqlite3_column_text(statement, 3));
+		//Don't cache the birth
+
+		//world position
+		newChar.mapIndex = sqlite3_column_int(statement, 5);
+		newChar.position.x = (double)sqlite3_column_int(statement, 6);
+		newChar.position.y = (double)sqlite3_column_int(statement, 7);
+
+		//statistics
+		newChar.level = sqlite3_column_int(statement, 8);
+		newChar.exp = sqlite3_column_int(statement, 9);
+		newChar.maxHP = sqlite3_column_int(statement, 10);
+		newChar.health = sqlite3_column_int(statement, 11);
+		newChar.maxMP = sqlite3_column_int(statement, 12);
+		newChar.mana = sqlite3_column_int(statement, 13);
+		newChar.attack = sqlite3_column_int(statement, 14);
+		newChar.defence = sqlite3_column_int(statement, 15);
+		newChar.intelligence = sqlite3_column_int(statement, 16);
+		newChar.resistance = sqlite3_column_int(statement, 17);
+		newChar.accuracy = sqlite3_column_double(statement, 18);
+		newChar.evasion = sqlite3_column_double(statement, 19);
+		newChar.luck = sqlite3_column_double(statement, 20);
+
+		//TODO: equipment
+
+		//finish the routine
+		sqlite3_finalize(statement);
+		return uid;
+	}
+
+	sqlite3_finalize(statement);
+
+	if (ret == SQLITE_DONE) {
+		//create the non-existant character instead
+		return CreateCharacter(owner, handle, avatar);
+	}
+
+	throw(std::runtime_error(std::string() + "Unknown SQL error in LoadCharacter: " + sqlite3_errmsg(database) ));
+}
+
+int ServerApplication::SaveCharacter(int uid) {
+	//save this character from memory, replacing it if it exists in the database
+	//DOCS: To use this method, change the in-memory copy, and then call this function using that object's UID.
+
+	//this method fails if this character is not loaded
+	if (characterMap.find(uid) == characterMap.end()) {
+		return -1;
+	}
+
+	CharacterData& character = characterMap[uid];
+	sqlite3_stmt* statement = nullptr;
+
+	//prep
+	if (sqlite3_prepare_v2(database, SAVE_CHARACTER, -1, &statement, nullptr) != SQLITE_OK) {
+		throw( std::runtime_error(std::string() + "Failed to prepare an SQL statement: " + sqlite3_errmsg(database)) );
+	}
+
+	//parameters
+	bool ret = false;
+	ret |= sqlite3_bind_int(statement, 1, uid) != SQLITE_OK;
+	ret |= sqlite3_bind_int(statement, 2, character.owner) != SQLITE_OK;
+	ret |= sqlite3_bind_int(statement, 3, character.mapIndex) != SQLITE_OK;
+	ret |= sqlite3_bind_int(statement, 4, (int)character.position.x) != SQLITE_OK;
+	ret |= sqlite3_bind_int(statement, 5, (int)character.position.y) != SQLITE_OK;
+	//TODO: stats, etc.
+
+	//check for binding errors
+	if (ret) {
+		throw( std::runtime_error(std::string() + "Failed to replace a prepared statement's parameter: " + sqlite3_errmsg(database)) );
+	}
+
+	//execute
+	if (sqlite3_step(statement) != SQLITE_DONE) {
+		//if this fails, than something went horribly wrong
+		sqlite3_finalize(statement);
+		throw( std::runtime_error(std::string() + "Unknown SQL error when saving an account: " + sqlite3_errmsg(database)) );
+	}
+
+	sqlite3_finalize(statement);
+
+	//successful execution
+	return 0;
+}
+
+void ServerApplication::UnloadCharacter(int uid) {
+	//save this character, then unload it
+	SaveCharacter(uid);
+	characterMap.erase(uid);
+}
+
+void ServerApplication::DeleteCharacter(int uid) {
+	//delete this character from the database, then remove it from memory
+	sqlite3_stmt* statement = nullptr;
+
+	//prep
+	if (sqlite3_prepare_v2(database, DELETE_CHARACTER, -1, &statement, nullptr) != SQLITE_OK) {
+		throw( std::runtime_error(std::string() + "Failed to prepare an SQL statement: " + sqlite3_errmsg(database)) );
+	}
+
+	//parameter
+	if (sqlite3_bind_int(statement, 1, uid) != SQLITE_OK) {
+		throw( std::runtime_error(std::string() + "Failed to replace a prepared statement's parameter: " + sqlite3_errmsg(database)) );
+	}
+
+	//execute
+	if (sqlite3_step(statement) != SQLITE_DONE) {
+		//if this fails, than something went horribly wrong
+		sqlite3_finalize(statement);
+		throw( std::runtime_error(std::string() + "Unknown SQL error when deleting an account: " + sqlite3_errmsg(database)) );
+	}
+
+	//finish the routine
+	sqlite3_finalize(statement);
+	characterMap.erase(uid);
+}