Bugfixes / Rework of save discovery system

server/src/io/anuke/mindustry/server/ServerControl.java

@@ -670,28 +670,25 @@ public class ServerControl implements ApplicationListener{
             if(state.is(State.playing)){
                 err("Already hosting. Type 'stop' to stop hosting first.");
                 return;
-            }else if(!Strings.canParseInt(arg[0])){
-                err("Invalid save slot '{0}'.", arg[0]);
-                return;
             }
 
-            int slot = Strings.parseInt(arg[0]);
+            FileHandle file = saveDirectory.child(arg[0] + "." + saveExtension);
 
-            if(!SaveIO.isSaveValid(slot)){
+            if(!SaveIO.isSaveValid(file)){
                 err("No (valid) save data found for slot.");
                 return;
             }
 
             Core.app.post(() -> {
                 try{
-                    SaveIO.loadFromSlot(slot);
+                    SaveIO.load(file);
                     state.rules.zone = null;
+                    info("Save loaded.");
+                    host();
+                    state.set(State.playing);
                 }catch(Throwable t){
                     err("Failed to load save. Outdated or corrupt file.");
                 }
-                info("Save loaded.");
-                host();
-                state.set(State.playing);
             });
         });
 
@@ -699,18 +696,25 @@ public class ServerControl implements ApplicationListener{
             if(!state.is(State.playing)){
                 err("Not hosting. Host a game first.");
                 return;
-            }else if(!Strings.canParseInt(arg[0])){
-                err("Invalid save slot '{0}'.", arg[0]);
-                return;
             }
 
+            FileHandle file = saveDirectory.child(arg[0] + "." + saveExtension);
+
             Core.app.post(() -> {
-                int slot = Strings.parseInt(arg[0]);
-                SaveIO.saveToSlot(slot);
-                info("Saved to slot {0}.", slot);
+                SaveIO.save(file);
+                info("Saved to {0}.", file);
             });
         });
 
+        handler.register("saves", "List all saves in the save directory.", arg -> {
+            info("Save files: ");
+            for(FileHandle file : saveDirectory.list()){
+                if(file.extension().equals(saveExtension)){
+                    info("| &ly{0}", file.nameWithoutExtension());
+                }
+            }
+        });
+
         handler.register("gameover", "Force a game over.", arg -> {
             if(state.is(State.menu)){
                 info("Not playing a map.");