Implemented ManagerInterface in AccountManager and CharacterManager

ManagerInterface was already designed for those two anyway. The only thing
left to do is to rewrite the room API, and the whole thing should work
fine again.

I still think map data should be saved and loaded by lua code, so the
rooms will still implement lua hooks. There may be other things that can
be loaded from SQL, but I don't know what.

server/characters/character_manager.cpp

@@ -98,7 +98,7 @@ int CharacterManager::Load(int owner, std::string handle, std::string avatar) {
 		int uid = sqlite3_column_int(statement, 0);
 
 		//check to see if this character is already loaded
-		if (characterMap.find(uid) != characterMap.end()) {
+		if (elementMap.find(uid) != elementMap.end()) {
 			sqlite3_finalize(statement);
 			return -1;
 		}
@@ -110,7 +110,7 @@ int CharacterManager::Load(int owner, std::string handle, std::string avatar) {
 		}
 
 		//extract the data into memory
-		CharacterData& newChar = characterMap[uid];
+		CharacterData& newChar = elementMap[uid];
 
 		//metadata
 		newChar.owner = owner;
@@ -145,11 +145,11 @@ int CharacterManager::Save(int uid) {
 	//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()) {
+	if (elementMap.find(uid) == elementMap.end()) {
 		return -1;
 	}
 
-	CharacterData& character = characterMap[uid];
+	CharacterData& character = elementMap[uid];
 	sqlite3_stmt* statement = nullptr;
 
 	//prep
@@ -187,7 +187,7 @@ int CharacterManager::Save(int uid) {
 void CharacterManager::Unload(int uid) {
 	//save this character, then unload it
 	Save(uid);
-	characterMap.erase(uid);
+	elementMap.erase(uid);
 }
 
 void CharacterManager::Delete(int uid) {
@@ -213,25 +213,26 @@ void CharacterManager::Delete(int uid) {
 
 	//finish the routine
 	sqlite3_finalize(statement);
-	characterMap.erase(uid);
+	elementMap.erase(uid);
 }
 
 void CharacterManager::UnloadAll() {
-	for (auto& it : characterMap) {
+	for (auto& it : elementMap) {
 		Save(it.first);
 	}
-	characterMap.clear();
+	elementMap.clear();
 }
 
-void CharacterManager::UnloadIf(std::function<bool(std::pair<int, CharacterData>)> fn) {
-	//replicate std::remove_if, using custom code
-	for (std::map<int, CharacterData>::iterator it = characterMap.begin(); it != characterMap.end(); /* empty */) {
+void CharacterManager::UnloadIf(std::function<bool(std::pair<const int, CharacterData>)> fn) {
+	std::map<int, CharacterData>::iterator it = elementMap.begin();
+	while (it != elementMap.end()) {
 		if (fn(*it)) {
 			Save(it->first);
-			it = characterMap.erase(it);
-			continue;
+			it = elementMap.erase(it);
+		}
+		else {
+			++it;
 		}
-		++it;
 	}
 }
 
@@ -240,9 +241,9 @@ void CharacterManager::UnloadIf(std::function<bool(std::pair<int, CharacterData>
 //-------------------------
 
 CharacterData* CharacterManager::Get(int uid) {
-	std::map<int, CharacterData>::iterator it = characterMap.find(uid);
+	std::map<int, CharacterData>::iterator it = elementMap.find(uid);
 
-	if (it == characterMap.end()) {
+	if (it == elementMap.end()) {
 		return nullptr;
 	}
 
@@ -250,7 +251,7 @@ CharacterData* CharacterManager::Get(int uid) {
 }
 
 int CharacterManager::GetLoadedCount() {
-	return characterMap.size();
+	return elementMap.size();
 }
 
 int CharacterManager::GetTotalCount() {
@@ -272,7 +273,7 @@ int CharacterManager::GetTotalCount() {
 }
 
 std::map<int, CharacterData>* CharacterManager::GetContainer() {
-	return &characterMap;
+	return &elementMap;
 }
 
 sqlite3* CharacterManager::SetDatabase(sqlite3* db) {