From a2cd701203198bfb79d3f8a532f1c8d8be82ca64 Mon Sep 17 00:00:00 2001
From: TakaRikka <takarikka@outlook.com>
Date: Thu, 13 Aug 2026 23:32:21 -0700
Subject: [PATCH] ykm/ykw/fairy hooks

---
 include/d/actor/d_a_npc_fairy.h |  2 +-
 include/d/actor/d_a_npc_ykm.h   |  2 +-
 mods/randomizer/src/hooks.cpp   | 45 +++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/include/d/actor/d_a_npc_fairy.h b/include/d/actor/d_a_npc_fairy.h
index efa9d760c1..da9977ed37 100644
--- a/include/d/actor/d_a_npc_fairy.h
+++ b/include/d/actor/d_a_npc_fairy.h
@@ -296,7 +296,7 @@ public:
 
     static DUSK_GAME_DATA char DUSK_CONST* DUSK_CONST mCutNameList[18];
     static DUSK_GAME_DATA cutFunc DUSK_CONST mCutList[18];
-private:
+// private:
     /* 0x0E40 */ NPC_FAIRY_HIO_CLASS* mHIO;
     /* 0x0E44 */ dCcD_Cyl mCyl;
     /* 0x0F80 */ u8 mType;
diff --git a/include/d/actor/d_a_npc_ykm.h b/include/d/actor/d_a_npc_ykm.h
index d486d6fe6a..5ad9e7210b 100644
--- a/include/d/actor/d_a_npc_ykm.h
+++ b/include/d/actor/d_a_npc_ykm.h
@@ -287,7 +287,7 @@ public:
 
     static DUSK_GAME_DATA char DUSK_CONST* DUSK_CONST mCutNameList[10];
     static DUSK_GAME_DATA cutFunc DUSK_CONST mCutList[10];
-private:
+// private:
     /* 0x0E40 */ mDoExt_McaMorfSO* mFishModelMorf;
     /* 0x0E44 */ mDoExt_McaMorfSO* mLeafModelMorf;
     /* 0x0E48 */ NPC_YKM_HIO_CLASS* mpHIO;
diff --git a/mods/randomizer/src/hooks.cpp b/mods/randomizer/src/hooks.cpp
index f6a27bf363..5437aaa9ef 100644
--- a/mods/randomizer/src/hooks.cpp
+++ b/mods/randomizer/src/hooks.cpp
@@ -19,6 +19,9 @@
 #include "d/actor/d_a_npc4.h"
 #include "d/actor/d_a_npc_bans.h"
 #include "d/actor/d_a_tag_kmsg.h"
+#include "d/actor/d_a_npc_fairy.h"
+#include "d/actor/d_a_npc_ykm.h"
+#include "d/actor/d_a_npc_ykw.h"
 #include "d/d_door_param2.h"
 #include "d/d_file_sel_info.h"
 #include "d/d_file_select.h"
@@ -91,6 +94,11 @@ DEFINE_HOOK(&daNpcF_c::orderEvent, daNpcF_c__orderEvent);
 
 DEFINE_HOOK(&daNpc_Bans_c::isDelete, daNpc_Bans_c__isDelete);
 
+DEFINE_HOOK(&daNpc_Fairy_c::AppearDemoCall, daNpc_Fairy_c__AppearDemoCall);
+
+DEFINE_HOOK(&daNpc_ykM_c::isDelete, daNpc_ykM_c__isDelete);
+DEFINE_HOOK(&daNpc_ykW_c::isDelete, daNpc_ykW_c__isDelete);
+
 namespace randomizer::ui {
 dialogSelectModeState g_dialogSelectModeState = SelectReady;
 }
@@ -1486,6 +1494,33 @@ HookAction hookPreNpcFOrderEvent(ModContext*, void* args, void* retval, void*) {
     return HOOK_CONTINUE;
 }
 
+void hookPostFairyAppearDemoCall(ModContext*, void* args, void* retval, void*) {
+    daNpc_Fairy_c* i_this = mods::arg<daNpc_Fairy_c*>(args, 0);
+
+    // randomizer overrides EVT_APPEAR_50F_04 set to always be EVT_APPEAR_50F_01
+    if (i_this->field_0xff4 == 12) {
+        i_this->field_0xff4 = 9;
+    }
+}
+
+void hookPostYkMIsDelete(ModContext*, void* args, void* retval, void*) {
+    daNpc_ykM_c* i_this = mods::arg<daNpc_ykM_c*>(args, 0);
+
+    if (i_this->mType == daNpc_ykM_c::TYPE_COOK) {
+        // We don't want cooking Yeto to leave the dungeon, even if the BK is obtained.
+        *static_cast<BOOL*>(retval) = FALSE;
+    }
+}
+
+void hookPostYkWIsDelete(ModContext*, void* args, void* retval, void*) {
+    daNpc_ykW_c* i_this = mods::arg<daNpc_ykW_c*>(args, 0);
+
+    if (i_this->field_0xf80 == 1) {
+        // We don't want Yeta to leave the dungeon, even if the BK is obtained.
+        *static_cast<BOOL*>(retval) = FALSE;
+    }
+}
+
 }
 
 ModResult initialize() {
@@ -1562,6 +1597,11 @@ ModResult initialize() {
 
     ADD_HOOK_PRE(daNpc_Bans_c__isDelete, hookPreNpcBansIsDelete);
 
+    ADD_HOOK_POST(daNpc_Fairy_c__AppearDemoCall, hookPostFairyAppearDemoCall);
+
+    ADD_HOOK_POST(daNpc_ykM_c__isDelete, hookPostYkMIsDelete);
+    ADD_HOOK_POST(daNpc_ykW_c__isDelete, hookPostYkWIsDelete);
+
     return MOD_OK;
 }
 
@@ -1627,6 +1667,11 @@ ModResult uninstall() {
 
     mods::hook::uninstall<daNpc_Bans_c__isDelete>(svc_hook);
 
+    mods::hook::uninstall<daNpc_Fairy_c__AppearDemoCall>(svc_hook);
+
+    mods::hook::uninstall<daNpc_ykM_c__isDelete>(svc_hook);
+    mods::hook::uninstall<daNpc_ykW_c__isDelete>(svc_hook);
+
     return MOD_OK;
 }
 }
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