ability to query client brand and server scarpet version.

docs/scarpet/api/Auxiliary.md

@@ -500,7 +500,6 @@ Available options in the scarpet app space:
   * `game_version` - base version of the game
   
  Server related properties
-
  * `server_motd` - the motd of the server visible when joining
  * `server_ip` - IP adress of the game hosted
  * `server_whitelisted` - boolean indicating whether the access to the server is only for whitelisted players
@@ -517,3 +516,6 @@ Available options in the scarpet app space:
  * `java_bits` - number indicating how many bits the Java has, 32 or 64
  * `java_system_cpu_load` - current percentage of CPU used by the system
  * `java_process_cpu_load` - current percentage of CPU used by JVM
+ 
+ Scarpet related properties
+ * `scarpet_version` - returns the version of the carpet your scarpet comes with.

docs/scarpet/api/Entities.md

@@ -366,6 +366,11 @@ Player's ping in milliseconds, or `null` if its not a player.
 
 Player's permission level, or `null` if not applicable for this entity.
 
+### `query(e, 'client_brand')`
+
+Returns recognized type of client of the client connected. Possible results include `'vanilla'`, or `'carpet <version>'` where 
+version indicates the version of the connected carpet client. 
+
 ### `query(e, 'effect', name?)`
 
 Without extra arguments, it returns list of effect active on a living entity. Each entry is a triple of short 

src/main/java/carpet/network/ServerNetworkHandler.java

@@ -217,6 +217,13 @@ public class ServerNetworkHandler
 
     }
 
+    public static String getPlayerStatus(ServerPlayerEntity player)
+    {
+        if (remoteCarpetPlayers.containsKey(player)) return "carpet "+remoteCarpetPlayers.get(player);
+        if (validCarpetPlayers.contains(player)) return "carpet "+CarpetSettings.carpetVersion;
+        return "vanilla";
+    }
+
     private static class DataBuilder
     {
         private CompoundTag tag;

src/main/java/carpet/script/utils/SystemInfo.java

@@ -1,6 +1,7 @@
 package carpet.script.utils;
 
 import carpet.CarpetServer;
+import carpet.CarpetSettings;
 import carpet.script.CarpetContext;
 import carpet.script.CarpetScriptHost;
 import carpet.script.value.ListValue;
@@ -123,14 +124,7 @@ public class SystemInfo {
             });
             return carpetRules;
         });
-
-
-
-
-
-
-
-
+        put("scarpet_version", c -> StringValue.of(CarpetSettings.carpetVersion));
 
     }};
     public static Value get(String what, CarpetContext cc)

src/main/java/carpet/script/value/EntityValue.java

@@ -9,6 +9,7 @@ import carpet.fakes.MobEntityInterface;
 import carpet.fakes.HungerManagerInterface;
 import carpet.fakes.ServerPlayerInteractionManagerInterface;
 import carpet.helpers.Tracer;
+import carpet.network.ServerNetworkHandler;
 import carpet.patches.EntityPlayerMPFake;
 import carpet.script.CarpetContext;
 import carpet.script.EntityEventsGroup;
@@ -579,6 +580,14 @@ public class EntityValue extends Value
             return Value.NULL;
         });
 
+        put("client_brand", (e, a) -> {
+            if (e instanceof ServerPlayerEntity)
+            {
+                return StringValue.of(ServerNetworkHandler.getPlayerStatus((ServerPlayerEntity) e));
+            }
+            return Value.NULL;
+        });
+
         put("team", (e, a) -> e.getScoreboardTeam()==null?Value.NULL:new StringValue(e.getScoreboardTeam().getName()));
 
         put("ping", (e, a) -> {