From bce88e1d9bac79e5ca97fe6cb98cfb8fae0657b5 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Sat, 31 Oct 2026 16:28:18 +0000
Subject: [PATCH] Decompile fn_23737 (CSession::ToggleTrackedAchievement)

Batch #8247 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_23737 CSession::ToggleTrackedAchievement: logic confirmed by peer review

Peer-reviewed-by: System4z, Toshiro, dori
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Client/Session.h               | 15 ++++--
 Source/Client/SessionAchievements.cpp | 76 +++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 5 deletions(-)

diff --git a/Source/Client/Session.h b/Source/Client/Session.h
index 84efb5f5..8b0f2a1e 100644
--- a/Source/Client/Session.h
+++ b/Source/Client/Session.h
@@ -67,14 +67,18 @@ struct MapPosEntry {
 };
 
 struct SessionRecord6178Entry {
-  /* 0000 */ std::string unknown_0000;
-  /* 0018 */ int unknown_0018;
+  // INLINED
+  SessionRecord6178Entry(const std::string& text, bool completed) : text(text), completed(completed) {
+  }
+
+  /* 0000 */ std::string text;
+  /* 0018 */ bool completed;
 };
 
 struct SessionRecord6178 {
-  /* 0000 */ unsigned char unknown_0000;
-  /* 0001 */ unsigned char unknown_0001;
-  /* 0004 */ int id;
+  /* 0000 */ unsigned char unknown_0000 = 0;
+  /* 0001 */ unsigned char unknown_0001 = 0;
+  /* 0004 */ int id = -1;
   /* 0008 */ std::string unknown_0008;
   /* 0020 */ std::vector<SessionRecord6178Entry> unknown_0020;
 };
@@ -655,6 +659,7 @@ public:
   int GetPetJobByEggItem(int eggItemId);
   const char* GetPetString(int id);
   int AddUnknown6160(int id);
+  bool ToggleTrackedAchievement(int id);
   const char* GetPetTalkName(int job);
   const char* GetPetTalkActionName(int action);
   void GetPetTalkText(int job, int hungerState, int action, char* text);
diff --git a/Source/Client/SessionAchievements.cpp b/Source/Client/SessionAchievements.cpp
index 2e8fd959..706d4b04 100644
--- a/Source/Client/SessionAchievements.cpp
+++ b/Source/Client/SessionAchievements.cpp
@@ -3,6 +3,8 @@
 #include "Contents/Jobs/JobInheritance.h"
 #include "UI/Window/UIWindow.h"
 #include "UI/Window/UIWindowMgr.h"
+#include "Contents/MessageTable.h"
+#include "Utility/Text/FormatString.h"
 
 #include <algorithm>
 #include <string>
@@ -43,3 +45,77 @@ int CSession::AddUnknown6160(int id) {
 
   return value;
 }
+
+// OFFSET: 0x00E06580
+// FUNCTION: fn_23737
+bool CSession::ToggleTrackedAchievement(int id) {
+  std::vector<SessionRecord6178>& tracked = this->unknown_6178;
+  auto found = std::find_if(tracked.begin(), tracked.end(), [id](SessionRecord6178 record) { return id == record.id; });
+
+  SessionRecord6144* progress;
+  auto record = this->unknown_6144.find(id);
+  if (record != this->unknown_6144.end()) {
+    progress = &record->second;
+  } else {
+    this->unknown_6144.insert(std::make_pair(id, SessionRecord6144()));
+    reinterpret_cast<unsigned char*>(&this->unknown_6144[id].unknown_0000)[0] = 1;
+    progress = &this->unknown_6144[id];
+  }
+
+  if (!progress) {
+    return false;
+  }
+
+  if (found != tracked.end()) {
+    tracked.erase(found);
+  } else {
+    if (tracked.size() >= 3) {
+      g_windowMgr.SendNotice(1, reinterpret_cast<std::intptr_t>(LookupMessage(0xA78)), 0x64FFFF, 0, 0, 0);
+      return false;
+    }
+
+    AchievementInfo info;
+    g_achievementMgr->GetAchievement(info, id);
+
+    SessionRecord6178 entry;
+    entry.id = id;
+    entry.unknown_0001 = reinterpret_cast<const unsigned char*>(&progress->unknown_0000)[1];
+    entry.unknown_0008 = info.title;
+
+    for (unsigned int i = 0; i < info.rewards.size(); ++i) {
+      const AchievementReward& reward = info.rewards[i];
+      std::string text;
+      bool completed = false;
+
+      if (info.unknown_0064 == 0) {
+        if (reward.text.size() > 40) {
+          text = FormatOwnedString("- %s...", reward.text.substr(0, 40).c_str());
+        } else {
+          text = FormatOwnedString("- %s", reward.text.c_str());
+        }
+
+        completed = static_cast<int>(progress->unknown_0004[i]) > 0;
+      } else if (info.unknown_0064 == 1) {
+        std::string count = FormatOwnedString("(%d/%d)", progress->unknown_0004[i], reward.unknown_0018);
+        if (reward.text.size() + count.size() > 40) {
+          text = FormatOwnedString("- %s...%s", reward.text.substr(0, 40 - count.size()).c_str(), count.c_str());
+        } else {
+          text = FormatOwnedString("- %s %s", reward.text.c_str(), count.c_str());
+        }
+
+        completed = static_cast<int>(progress->unknown_0004[i]) == reward.unknown_0018;
+      }
+
+      entry.unknown_0020.emplace_back(text, completed);
+    }
+
+    tracked.push_back(entry);
+  }
+
+  if (tracked.size() == 0) {
+    g_windowMgr.CloseWindow(0x10F);
+    return false;
+  }
+
+  return true;
+}