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/accounts/account_manager.cpp

@@ -87,13 +87,13 @@ int AccountManager::Load(std::string username, int clientIndex) {
 		int uid = sqlite3_column_int(statement, 0);
 
 		//check to see if this account is already loaded
-		if (accountMap.find(uid) != accountMap.end()) {
+		if (elementMap.find(uid) != elementMap.end()) {
 			sqlite3_finalize(statement);
 			return -1;
 		}
 
 		//extract the data into memory
-		AccountData& newAccount = accountMap[uid];
+		AccountData& newAccount = elementMap[uid];
 		newAccount.username = reinterpret_cast<const char*>(sqlite3_column_text(statement, 1));
 		newAccount.blackListed = sqlite3_column_int(statement, 2);
 		newAccount.whiteListed = sqlite3_column_int(statement, 3);
@@ -121,11 +121,11 @@ int AccountManager::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 account is not loaded
-	if (accountMap.find(uid) == accountMap.end()) {
+	if (elementMap.find(uid) == elementMap.end()) {
 		return -1;
 	}
 
-	AccountData& account = accountMap[uid];
+	AccountData& account = elementMap[uid];
 	sqlite3_stmt* statement = nullptr;
 
 	//prep
@@ -163,7 +163,7 @@ void AccountManager::Unload(int uid) {
 	//save this user account, and then unload it
 	//NOTE: the associated characters are unloaded externally
 	Save(uid);
-	accountMap.erase(uid);
+	elementMap.erase(uid);
 }
 
 void AccountManager::Delete(int uid) {
@@ -190,25 +190,27 @@ void AccountManager::Delete(int uid) {
 
 	//finish the routine
 	sqlite3_finalize(statement);
-	accountMap.erase(uid);
+	elementMap.erase(uid);
 }
 
 void AccountManager::UnloadAll() {
-	for (auto& it : accountMap) {
+	for (auto& it : elementMap) {
 		Save(it.first);
 	}
-	accountMap.clear();
+	elementMap.clear();
 }
 
-void AccountManager::UnloadIf(std::function<bool(std::pair<int, AccountData>)> fn) {
+void AccountManager::UnloadIf(std::function<bool(std::pair<const int, AccountData>)> fn) {
 	//replicate std::remove_if, using custom code
-	for (std::map<int, AccountData>::iterator it = accountMap.begin(); it != accountMap.end(); /* empty */) {
+	std::map<int, AccountData>::iterator it = elementMap.begin();
+	while (it != elementMap.end()) {
 		if (fn(*it)) {
 			Save(it->first);
-			it = accountMap.erase(it);
-			continue;
+			it = elementMap.erase(it);
+		}
+		else {
+			++it;
 		}
-		++it;
 	}
 }
 
@@ -218,9 +220,9 @@ void AccountManager::UnloadIf(std::function<bool(std::pair<int, AccountData>)> f
 
 AccountData* AccountManager::Get(int uid) {
 	//TODO: could this load an account first?
-	std::map<int, AccountData>::iterator it = accountMap.find(uid);
+	std::map<int, AccountData>::iterator it = elementMap.find(uid);
 
-	if (it == accountMap.end()) {
+	if (it == elementMap.end()) {
 		return nullptr;
 	}
 
@@ -228,7 +230,7 @@ AccountData* AccountManager::Get(int uid) {
 }
 
 int AccountManager::GetLoadedCount() {
-	return accountMap.size();
+	return elementMap.size();
 }
 
 int AccountManager::GetTotalCount() {
@@ -250,7 +252,7 @@ int AccountManager::GetTotalCount() {
 }
 
 std::map<int, AccountData>* AccountManager::GetContainer() {
-	return &accountMap;
+	return &elementMap;
 }
 
 sqlite3* AccountManager::SetDatabase(sqlite3* db) {