Add a way to set subscribed groups.

Readme_release.txt

@@ -48,6 +48,10 @@ Depots:
 This is pretty rare but some games might use depot ids to see if dlcs are installed. You can provide a list of installed depots to the game with a steam_settings\depots.txt file.
 See the steam_settings.EXAMPLE folder for an example.
 
+Subscribed Groups:
+Some games like payday 2 check which groups you are subscribed in and unlock things based on that. You can provide a list of subscribed groups to the game with a steam_settings\subscribed_groups.txt file.
+See steam_settings.EXAMPLE\subscribed_groups.EXAMPLE.txt for an example for payday 2.
+
 App paths:
 Some rare games might need to be provided one or more paths to app ids. For example the path to where a dlc is installed. This sets the paths returned by the Steam_Apps::GetAppInstallDir function.
 See steam_settings.EXAMPLE\app_paths.EXAMPLE.txt for an example.

dll/settings.h

@@ -132,6 +132,9 @@ public:
     std::map<std::string, Stat_config> getStats() { return stats; }
     void setStatDefiniton(std::string name, struct Stat_config stat_config) {stats[name] = stat_config; }
 
+    //subscribed lobby/group ids
+    std::set<uint64> subscribed_groups;
+
     //images
     std::map<int, struct Image_Data> images;
     int add_image(std::string data, uint32 width, uint32 height);

dll/settings_parser.cpp

@@ -511,6 +511,28 @@ uint32 create_localstorage_settings(Settings **settings_client_out, Settings **s
         }
     }
 
+    {
+        std::string depots_config_path = Local_Storage::get_game_settings_path() + "subscribed_groups.txt";
+        std::ifstream input( depots_config_path );
+        if (input.is_open()) {
+            consume_bom(input);
+            for( std::string line; getline( input, line ); ) {
+                if (!line.empty() && line[line.length()-1] == '\n') {
+                    line.pop_back();
+                }
+
+                if (!line.empty() && line[line.length()-1] == '\r') {
+                    line.pop_back();
+                }
+
+                uint64 source_id = stoull(line);
+                settings_client->subscribed_groups.insert(source_id);
+                settings_server->subscribed_groups.insert(source_id);
+                PRINT_DEBUG("Added source %llu\n", source_id);
+            }
+        }
+    }
+
     {
         std::string mod_path = Local_Storage::get_game_settings_path() + "mods";
         std::vector<std::string> paths = Local_Storage::get_filenames_path(mod_path);

dll/steam_friends.h

@@ -502,6 +502,10 @@ bool IsUserInSource( CSteamID steamIDUser, CSteamID steamIDSource )
         if (settings->get_lobby() == steamIDSource) {
             return true;
         }
+
+        if (settings->subscribed_groups.find(steamIDSource.ConvertToUint64()) != settings->subscribed_groups.end()) {
+            return true;
+        }
     } else {
         Friend *f = find_friend(steamIDUser);
         if (!f) return false;

files_example/steam_settings.EXAMPLE/subscribed_groups.EXAMPLE.txt

@@ -0,0 +1,4 @@
+103582791433980119
+103582791438562929
+103582791441335905
+103582791460014708