handling Infantry packets, which have an extra field; added tests and comments

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

@@ -6,20 +6,58 @@ import scodec.Codec
 import scodec.codecs._
 
 /**
-  * na
-  * @param list na
+  * Load the designator for an entry in the player's favorites list.<br>
+  * <br>
+  * This entry defines a loadout but does not directly associate itself with the configurations and contents of the loadout.
+  * It is just the user-defined name that appears on a "Favorites" tab list and can be selected.
+  * A subsequent server request - `ItemTransactionMessage` - must be made to retrieve the said configuration and content for loading.
+  * Multiple separated favorites lists are present in the game.
+  * All entries are prepended with their destination list, which determines what kind of terminal or menu allows them to be viewable.<br>
+  * <br>
+  * Infantry equipment favorites are appended with a code for the type of exo-suit that they will load on a player.
+  * This does not match the same two field numbering system as in `ArmorChangedMessage` packets.
+  * Subtypes are not considered separately.<br>
+  * <br>
+  * Lists:<br>
+  * `
+  * 0 - Equipment Terminal (infantry)<br>
+  * 1 - Repair/Rearm (standard vehicles)<br>
+  * `
+  * <br>
+  * Armors:<br>
+  * `
+  * 1 - Agile<br>
+  * 2 - Reinforced<br>
+  * 4 - AA MAX<br>
+  * 5 - AI MAX<br>
+  * 6 - AV MAX<br>
+  * `
+  * <br>
+  * Exploration 1:<br>
+  * The identifier for the list is two bits so four separated lists of Favorites are supportable.
+  * Two of the lists are common enough and we can assume one of the others is related to Battleframe Robotics.
+  * What, if anything, is the fourth indexed list?<br>
+  * <br>
+  * Exploration 2:<br>
+  * There are three unaccounted exo-suit indices - '0', '3', and '7' - and two specific kinds of exo-suit that are not defined - Infiltration and Standard.
+  * It is possible that one of the indices also defines the generic MAX (see `ArmorChangedMessage`).
+  * Which exo-suit is associated with which index?<br>
+  * <br>
+  * Exploration 3:<br>
+  * The `armor` parameter coincides with the type of exo-suit maintained by the loadout.
+  * Does this value help the client judge when a favorite can be selected by checking against certifications for exo-suit permission?
+  * (If so, why isn't it working?)
+  * @param list the destination list
   * @param player_guid the player
-  * @param line na
-  * @param subject na
-  * @param armor the type of exo-suit
-  * @param subtype the exo-suit subtype, if any
+  * @param line the zero-indexed line number of this entry in its list
+  * @param label the identifier for this entry
+  * @param armor the type of exo-suit, if an Infantry loadout
   */
 final case class FavoritesMessage(list : Int,
                                   player_guid : PlanetSideGUID,
                                   line : Int,
-                                  subject : String,
-                                  armor : Option[Int] = None,
-                                  subtype : Option[Int] = None)
+                                  label : String,
+                                  armor : Option[Int] = None)
   extends PlanetSideGamePacket {
   type Packet = FavoritesMessage
   def opcode = GamePacketOpcode.FavoritesMessage
@@ -31,8 +69,7 @@ object FavoritesMessage extends Marshallable[FavoritesMessage] {
     ("list" | uintL(2)) >>:~ { value =>
       ("player_guid" | PlanetSideGUID.codec) ::
         ("line" | uintL(4)) ::
-        ("subject" | PacketHelpers.encodedWideStringAligned(2)) ::
-        conditional(value == 0, "armor" | uintL(3)) ::
-        conditional(value == 0, "subtype" | uintL(3))
+        ("label" | PacketHelpers.encodedWideStringAligned(2)) ::
+        conditional(value == 0, "armor" | uintL(3))
     }).as[FavoritesMessage]
 }