Prevent world creation if the world already exists

[dragonfireclient.git] / src / subgame.cpp

diff --git a/src/subgame.cpp b/src/subgame.cpp
index 9a8ebe69f2de1c1389bd0bab65b79b6e7feb2d5e..c36189933237acd8bd8c983206bce5f6607d1d5a 100644 (file)
--- a/src/subgame.cpp
+++ b/src/subgame.cpp
@@ -3,16 +3,16 @@ Minetest-c55
 Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
 
 This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+GNU Lesser General Public License for more details.
 
-You should have received a copy of the GNU General Public License along
+You should have received a copy of the GNU Lesser General Public License along
 with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
@@ -22,6 +22,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "filesys.h"
 #include "settings.h"
 #include "log.h"
+#include "util/string.h"
 
 std::string getGameName(const std::string &game_path)
 {
@@ -35,20 +36,43 @@ std::string getGameName(const std::string &game_path)
        return conf.get("name");
 }
 
+struct GameFindPath
+{
+       std::string path;
+       bool user_specific;
+       GameFindPath(const std::string &path, bool user_specific):
+               path(path),
+               user_specific(user_specific)
+       {}
+};
+
 SubgameSpec findSubgame(const std::string &id)
 {
        if(id == "")
                return SubgameSpec();
        std::string share = porting::path_share;
        std::string user = porting::path_user;
+       std::vector<GameFindPath> find_paths;
+       find_paths.push_back(GameFindPath(
+                       user + DIR_DELIM + "games" + DIR_DELIM + id + "_game", true));
+       find_paths.push_back(GameFindPath(
+                       user + DIR_DELIM + "games" + DIR_DELIM + id, true));
+       find_paths.push_back(GameFindPath(
+                       share + DIR_DELIM + "games" + DIR_DELIM + id + "_game", false));
+       find_paths.push_back(GameFindPath(
+                       share + DIR_DELIM + "games" + DIR_DELIM + id, false));
        // Find game directory
-       std::string game_path = user + DIR_DELIM + "games" + DIR_DELIM + id;
+       std::string game_path;
        bool user_game = true; // Game is in user's directory
-       if(!fs::PathExists(game_path)){
-               game_path = share + DIR_DELIM + "games" + DIR_DELIM + id;
-               user_game = false;
+       for(u32 i=0; i<find_paths.size(); i++){
+               const std::string &try_path = find_paths[i].path;
+               if(fs::PathExists(try_path)){
+                       game_path = try_path;
+                       user_game = find_paths[i].user_specific;
+                       break;
+               }
        }
-       if(!fs::PathExists(game_path))
+       if(game_path == "")
                return SubgameSpec();
        // Find mod directories
        std::set<std::string> mods_paths;
@@ -57,13 +81,30 @@ SubgameSpec findSubgame(const std::string &id)
                mods_paths.insert(share + DIR_DELIM + "mods" + DIR_DELIM + id);
        if(user != share || user_game)
                mods_paths.insert(user + DIR_DELIM + "mods" + DIR_DELIM + id);
-       // TODO: Read proper name from game_path/game.conf
        std::string game_name = getGameName(game_path);
        if(game_name == "")
                game_name = id;
        return SubgameSpec(id, game_path, mods_paths, game_name);
 }
 
+SubgameSpec findWorldSubgame(const std::string &world_path)
+{
+       std::string world_gameid = getWorldGameId(world_path, true);
+       // See if world contains an embedded game; if so, use it.
+       std::string world_gamepath = world_path + DIR_DELIM + "game";
+       if(fs::PathExists(world_gamepath)){
+               SubgameSpec gamespec;
+               gamespec.id = world_gameid;
+               gamespec.path = world_gamepath;
+               gamespec.mods_paths.insert(world_gamepath + DIR_DELIM + "mods");
+               gamespec.name = getGameName(world_gamepath);
+               if(gamespec.name == "")
+                       gamespec.name = "unknown";
+               return gamespec;
+       }
+       return findSubgame(world_gameid);
+}
+
 std::set<std::string> getAvailableGameIds()
 {
        std::set<std::string> gameids;
@@ -76,7 +117,12 @@ std::set<std::string> getAvailableGameIds()
                for(u32 j=0; j<dirlist.size(); j++){
                        if(!dirlist[j].dir)
                                continue;
-                       gameids.insert(dirlist[j].name);
+                       const char *ends[] = {"_game", NULL};
+                       std::string shorter = removeStringEnd(dirlist[j].name, ends);
+                       if(shorter != "")
+                               gameids.insert(shorter);
+                       else
+                               gameids.insert(dirlist[j].name);
                }
        }
        return gameids;