adjusted fields for slot numbering of either 8u or 16u index

common/src/main/scala/net/psforever/packet/game/ObjectAttachMessage.scala

@@ -1,7 +1,7 @@
 // Copyright (c) 2016 PSForever.net to present
 package net.psforever.packet.game
 
-import net.psforever.packet.{GamePacketOpcode, Marshallable, PlanetSideGamePacket}
+import net.psforever.packet.{GamePacketOpcode, Marshallable, PacketHelpers, PlanetSideGamePacket}
 import scodec.Codec
 import scodec.codecs._
 
@@ -16,29 +16,31 @@ import scodec.codecs._
   * This packet is a complementary packet that simulates a lazy TCP-like approach to coordinating item manipulation.
   * In some cases, the client will (appear to) proceed with what it intended to do without waiting for the server to confirm.
   * For example, grabbing an item from an inventory position will generate a `MoveItemMessage` that defines "the player's cursor" as a destination.
-  * The client will "attach to the player's cursor" without waiting for the `ObjectAttachMessage` from the server which echoes the destination.
+  * The client will "attach to the player's cursor" without waiting for an `ObjectAttachMessage` from the server which echoes the destination.
   * The change is observable.
   * Inversely, the client is blocked from detaching the item from "the player's cursor" and putting it back into the inventory on its own.
   * It waits until it receives an `ObjectAttachMessage` in confirmation.<br>
   * <br>
   *  Destination codes:<br>
-  * `80` is the first pistol slot<br>
+  * `0x80` is the first pistol slot<br>
-  * `81` is the second pistol slot<br>
+  * `0x81` is the second pistol slot<br>
-  * `82` is the first rifle slot<br>
+  * `0x82` is the first rifle slot<br>
-  * `83` is the second rifle slot<br>
+  * `0x83` is the second rifle slot<br>
-  * `86` is the first entry in the player's inventory<br>
+  * `0x84` is the melee/knife slot<br>
-  * `00 FA` is a special dest/extra code that "attaches the object to the player's cursor"
+  * `0x86` is the first entry in the player's grid inventory<br>
+  * `0x00FA` is a special dest/extra code that "attaches the object to the player's cursor"<br>
+  * <br>
+  * Exploration:<br>
+  * What is slot `0x85`?
   * @param player_guid the player GUID
   * @param item_guid the item GUID
-  * @param dest a codified location within the player's inventory see above
+  * @param slot a codified location within the player's inventory;
-  * @param extra optional; a special kind of item manipulation; the common one is `FA`
+  *             may be 8u (0 is 0x80, to 127) or 16u (128 is 0x0080)
   * @see MoveItemMessage
-  * @see ObjectAttachMessage
   */
 final case class ObjectAttachMessage(player_guid : PlanetSideGUID,
                                      item_guid : PlanetSideGUID,
-                                     dest : Int,
+                                     slot : Int)
-                                     extra : Option[Int])
   extends PlanetSideGamePacket {
   type Packet = ObjectAttachMessage
   def opcode = GamePacketOpcode.ObjectAttachMessage
@@ -49,8 +51,6 @@ object ObjectAttachMessage extends Marshallable[ObjectAttachMessage] {
   implicit val codec : Codec[ObjectAttachMessage] = (
     ("player_guid" | PlanetSideGUID.codec) ::
       ("item_guid" | PlanetSideGUID.codec) ::
-      (("dest" | uint8L) >>:~ { loc =>
+      ("slot" | PacketHelpers.encodedStringSize)
-        conditional(loc == 0, "extra" | uint8L).hlist
-      })
     ).as[ObjectAttachMessage]
 }

common/src/test/scala/GamePacketTest.scala

@@ -303,23 +303,41 @@ class GamePacketTest extends Specification {
       val stringToInventory = hex"2A 9F05 D405 86"
       val stringToCursor = hex"2A 9F05 D405 00FA"
 
-      "encode" in {
+      "encode (inventory 1,1)" in {
         PacketCoding.DecodePacket(stringToInventory).require match {
           case ObjectAttachMessage(player_guid, item_guid, index) =>
             player_guid mustEqual PlanetSideGUID(1439)
             item_guid mustEqual PlanetSideGUID(1492)
-            index mustEqual 134
+            index mustEqual 6
           case default =>
             ko
         }
       }
 
-      "decode" in {
+      "encode (cursor)" in {
-        val msg = ObjectAttachMessage(PlanetSideGUID(1439), PlanetSideGUID(1492), 134)
+        PacketCoding.DecodePacket(stringToCursor).require match {
+          case ObjectAttachMessage(player_guid, item_guid, index) =>
+            player_guid mustEqual PlanetSideGUID(1439)
+            item_guid mustEqual PlanetSideGUID(1492)
+            index mustEqual 250
+          case default =>
+            ko
+        }
+      }
+
+      "decode (inventory 1,1)" in {
+        val msg = ObjectAttachMessage(PlanetSideGUID(1439), PlanetSideGUID(1492), 6)
         val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
 
         pkt mustEqual stringToInventory
       }
+
+      "decode (cursor)" in {
+        val msg = ObjectAttachMessage(PlanetSideGUID(1439), PlanetSideGUID(1492), 250)
+        val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
+
+        pkt mustEqual stringToCursor
+      }
     }
 
     "DropItemMessage" should {