From f7c7dda76587d3c97b81bec132cfcda8f5399f92 Mon Sep 17 00:00:00 2001
From: Martin Michelsen <fuzziqersoftware+g@gmail.com>
Date: Sat, 23 Apr 2022 21:35:12 -0700
Subject: [PATCH] send item drop requests for final bosses

---
 src/CommandFormats.hh     |  2 +-
 src/Lobby.hh              |  7 +++---
 src/ReceiveSubcommands.cc | 45 ++++++++++++++++++++++++++++++++++++++-
 3 files changed, 49 insertions(+), 5 deletions(-)

diff --git a/src/CommandFormats.hh b/src/CommandFormats.hh
index 9832261b..80673251 100644
--- a/src/CommandFormats.hh
+++ b/src/CommandFormats.hh
@@ -1682,7 +1682,7 @@ struct G_EnemyDropItemRequest_6x60 {
   le_uint16_t request_id;
   le_float x;
   le_float y;
-  le_uint32_t unknown[2];
+  le_uint64_t unknown;
 };
 
 // 61: Feed MAG
diff --git a/src/Lobby.hh b/src/Lobby.hh
index 290b7a1a..3ffa8c63 100644
--- a/src/Lobby.hh
+++ b/src/Lobby.hh
@@ -2,6 +2,7 @@
 
 #include <inttypes.h>
 
+#include <array>
 #include <vector>
 #include <string>
 #include <memory>
@@ -34,7 +35,7 @@ struct Lobby {
   // item info
   std::vector<PSOEnemy> enemies;
   std::shared_ptr<const RareItemSet> rare_item_set;
-  uint32_t next_item_id[12];
+  std::array<uint32_t, 12> next_item_id;
   uint32_t next_game_item_id;
   PlayerInventoryItem next_drop_item;
   std::unordered_map<uint32_t, PlayerInventoryItem> item_id_to_floor_item;
@@ -43,7 +44,7 @@ struct Lobby {
   // game config
   GameVersion version;
   uint8_t section_id;
-  uint8_t episode;
+  uint8_t episode; // 1 = Ep1, 2 = Ep2, 3 = Ep4, 0xFF = Ep3
   uint8_t difficulty;
   uint8_t mode;
   std::u16string password;
@@ -60,7 +61,7 @@ struct Lobby {
   uint8_t max_clients;
   uint32_t flags;
   uint32_t loading_quest_id; // for use with joinable quests
-  std::shared_ptr<Client> clients[12];
+  std::array<std::shared_ptr<Client>, 12> clients;
 
   Lobby();
 
diff --git a/src/ReceiveSubcommands.cc b/src/ReceiveSubcommands.cc
index 72984935..7c15f717 100644
--- a/src/ReceiveSubcommands.cc
+++ b/src/ReceiveSubcommands.cc
@@ -574,6 +574,49 @@ static void process_subcommand_box_drop_item(shared_ptr<ServerState> s,
   }
 }
 
+static void process_subcommand_phase_setup(shared_ptr<ServerState>,
+    shared_ptr<Lobby> l, shared_ptr<Client> c, uint8_t command, uint8_t flag,
+    const string& data) {
+  const auto* p = check_size_sc(data, sizeof(PSOSubcommand), 0xFFFF);
+  if (!l->is_game()) {
+    return;
+  }
+  forward_subcommand(l, c, command, flag, data);
+
+  bool should_send_boss_drop_req = false;
+  if (p[2].dword == l->difficulty) {
+    if ((l->episode == 1) && (c->area == 0x0E)) {
+      // On Normal, Dark Falz does not have a third phase, so send the drop
+      // request after the end of the second phase. On all other difficulty
+      // levels, send it after the third phase.
+      if (((l->difficulty == 0) && (p[1].dword == 0x00000035)) ||
+          ((l->difficulty != 0) && (p[1].dword == 0x00000037))) {
+        should_send_boss_drop_req = true;
+      }
+    } else if ((l->episode == 2) && (p[1].dword == 0x00000057) && (c->area == 0x0D)) {
+      should_send_boss_drop_req = true;
+    }
+  }
+
+  if (should_send_boss_drop_req) {
+    auto c = l->clients.at(l->leader_id);
+    if (c) {
+      G_EnemyDropItemRequest_6x60 req = {
+        0x60,
+        0x06,
+        0x1090,
+        static_cast<uint8_t>(c->area),
+        static_cast<uint8_t>((l->episode == 2) ? 0x4E : 0x2F),
+        0x0B4F,
+        (l->episode == 2) ? -9999.0f : 10160.58984375f,
+        0.0f,
+        0xE0AEDC0100000002,
+      };
+      send_command(c, 0x62, l->leader_id, req);
+    }
+  }
+}
+
 // enemy hit by player
 static void process_subcommand_enemy_hit(shared_ptr<ServerState>,
     shared_ptr<Lobby> l, shared_ptr<Client> c, uint8_t command, uint8_t flag,
@@ -938,7 +981,7 @@ subcommand_handler_t subcommand_handlers[0x100] = {
   /* 72 */ process_subcommand_forward_check_game_loading,
   /* 73 */ process_subcommand_invalid,
   /* 74 */ process_subcommand_word_select,
-  /* 75 */ process_subcommand_forward_check_size_game,
+  /* 75 */ process_subcommand_phase_setup,
   /* 76 */ process_subcommand_forward_check_size_game, // Enemy killed
   /* 77 */ process_subcommand_forward_check_size_game, // Sync quest data
   /* 78 */ process_subcommand_unimplemented,