Merge pull request 'Added 0x83 (LobbyList), LobbyEntry, 0x84 (LobbySelect)' (#23) from changing_lobbies into master

Reviewed-by: jake <jake@sharnoth.com>

src/packet/ship.rs

@@ -10,6 +10,7 @@ use std::io::Read;
 
 const BLOCK_MENU_ID: u32 = 1;
 pub const ROOM_MENU_ID: u32 = 2;
+pub const LOBBY_MENU_ID: u32 = 3;
 
 #[pso_packet(0x03)]
 pub struct ShipWelcome {
@@ -89,6 +90,12 @@ pub struct MenuSelect {
     pub item: u32,
 }
 
+#[pso_packet(0x84)]
+pub struct LobbySelect {
+    pub menu: u32,
+    pub lobby: u32,
+}
+
 #[pso_packet(0xE7)]
 pub struct FullCharacter {
     #[no_debug]
@@ -365,3 +372,41 @@ pub struct RoomListResponse {
     pub baseroom: RoomList,
     pub rooms: Vec<RoomList>,
 }
+
+#[derive(PSOPacketData, Clone, Copy, Default)]
+pub struct LobbyEntry {
+    menu_id: u32,
+    item_id: u32,
+    padding: u32,
+}
+
+impl LobbyEntry {
+    pub fn new(menu_id: u32, lobby_id: u32) -> LobbyEntry {
+        LobbyEntry {
+            menu_id: menu_id,
+            item_id: lobby_id,
+            padding: 0,
+        }
+    }
+}
+
+#[pso_packet(0x83, manual_flag)]
+pub struct LobbyList {
+    flag: u32,
+    entries: [LobbyEntry; 16],
+}
+
+impl LobbyList {
+    pub fn new() -> LobbyList {
+        let lobbies = (0..16).fold([LobbyEntry::default(); 16],
+            |mut acc, index| {
+                acc[index].menu_id = LOBBY_MENU_ID;
+                acc[index].item_id = index as u32;
+                acc
+            });
+        LobbyList {
+            flag: 0x0F,
+            entries: lobbies,
+        }
+    }
+}