Packet: WeaponDryFireMessage (#59)

* Add WeaponDryFireMessage packet

* Add WeaponDryFireMessage test

common/src/main/scala/net/psforever/packet/GamePacketOpcode.scala

@@ -417,7 +417,7 @@ object GamePacketOpcode extends Enumeration {
       // OPCODE 80
       case TargetingInfoMessage => noDecoder(opcode)
       case TriggerEffectMessage => noDecoder(opcode)
-      case WeaponDryFireMessage => noDecoder(opcode)
+      case WeaponDryFireMessage => game.WeaponDryFireMessage.decode
       case DroppodLaunchRequestMessage => noDecoder(opcode)
       case HackMessage => noDecoder(opcode)
       case DroppodLaunchResponseMessage => noDecoder(opcode)

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

@@ -0,0 +1,27 @@
+// Copyright (c) 2016 PSForever.net to present
+package net.psforever.packet.game
+
+import net.psforever.packet.{GamePacketOpcode, Marshallable, PacketHelpers, PlanetSideGamePacket}
+import scodec.Codec
+import scodec.codecs._
+
+/**
+  * Instructs client to play a weapon's dryfire sound when sent server to client.
+  *
+  * The particular sound played depends on the type of weapon that the guid is (likely from adb gamedata).
+  * See also [[WeaponJammedMessage]]
+  *
+  * @param weapon_guid the weapon that is dry firing
+  */
+final case class WeaponDryFireMessage(weapon_guid : PlanetSideGUID)
+  extends PlanetSideGamePacket {
+  type Packet = WeaponDryFireMessage
+  def opcode = GamePacketOpcode.WeaponDryFireMessage
+  def encode = WeaponDryFireMessage.encode(this)
+}
+
+object WeaponDryFireMessage extends Marshallable[WeaponDryFireMessage] {
+  implicit val codec : Codec[WeaponDryFireMessage] = (
+      ("weapon_guid" | PlanetSideGUID.codec)
+    ).as[WeaponDryFireMessage]
+}

common/src/test/scala/GamePacketTest.scala

@@ -776,6 +776,26 @@ class GamePacketTest extends Specification {
       }
     }
 
+    "WeaponDryFireMessage" should {
+      val string = hex"52 4C00"
+
+      "decode" in {
+        PacketCoding.DecodePacket(string).require match {
+          case WeaponDryFireMessage(weapon_guid) =>
+            weapon_guid mustEqual PlanetSideGUID(76)
+          case default =>
+            ko
+        }
+      }
+
+      "encode" in {
+        val msg = WeaponDryFireMessage(PlanetSideGUID(76))
+        val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
+
+        pkt mustEqual string
+      }
+    }
+
     "PingMsg" should  {
       val packet = hex"1a 00000000 b0360000"