From c4cea74d30829d45f7424508c36b5f05b237be23 Mon Sep 17 00:00:00 2001
From: Leonid Pospelov <leonidpospelov.dev@gmail.com>
Date: Sat, 11 Nov 2023 03:14:49 +0600
Subject: [PATCH] feat(skymp5-server): add onCraft gamemode event (#1733)

---
 .../cpp/server_guest_lib/ActionListener.cpp   | 22 ++++++++++++----
 .../cpp/server_guest_lib/MpActor.cpp          | 26 +++++++++++++++++--
 skymp5-server/cpp/server_guest_lib/MpActor.h  |  3 +++
 3 files changed, 44 insertions(+), 7 deletions(-)

diff --git a/skymp5-server/cpp/server_guest_lib/ActionListener.cpp b/skymp5-server/cpp/server_guest_lib/ActionListener.cpp
index 1ded5f774c..c0be3b84fa 100644
--- a/skymp5-server/cpp/server_guest_lib/ActionListener.cpp
+++ b/skymp5-server/cpp/server_guest_lib/ActionListener.cpp
@@ -363,17 +363,22 @@ void ActionListener::OnConsoleCommand(
     ConsoleCommands::Execute(*me, consoleCommandName, args);
 }
 
-void UseCraftRecipe(MpActor* me, espm::COBJ::Data recipeData,
+void UseCraftRecipe(MpActor* me, const espm::COBJ* recipeUsed,
+                    espm::CompressedFieldsCache& cache,
                     const espm::CombineBrowser& br, int espmIdx)
 {
+  auto recipeData = recipeUsed->GetData(cache);
   auto mapping = br.GetCombMapping(espmIdx);
+
   std::vector<Inventory::Entry> entries;
   for (auto& entry : recipeData.inputObjects) {
     auto formId = espm::utils::GetMappedId(entry.formId, *mapping);
     entries.push_back({ formId, entry.count });
   }
+
   auto outputFormId =
     espm::utils::GetMappedId(recipeData.outputObjectFormId, *mapping);
+
   if (spdlog::should_log(spdlog::level::debug)) {
     std::string s = fmt::format("User formId={:#x} crafted", me->GetFormId());
     for (const auto& entry : entries) {
@@ -382,8 +387,16 @@ void UseCraftRecipe(MpActor* me, espm::COBJ::Data recipeData,
     s += fmt::format(" +{:#x} x{}", outputFormId, recipeData.outputCount);
     spdlog::debug("{}", s);
   }
-  me->RemoveItems(entries);
-  me->AddItem(outputFormId, recipeData.outputCount);
+
+  auto recipeId = espm::utils::GetMappedId(recipeUsed->GetId(), *mapping);
+
+  if (me->MpApiCraft(outputFormId, recipeData.outputCount, recipeId)) {
+    spdlog::trace("onCraft - not blocked by gamemode");
+    me->RemoveItems(entries);
+    me->AddItem(outputFormId, recipeData.outputCount);
+  } else {
+    spdlog::trace("onCraft - blocked by gamemode");
+  }
 }
 
 void ActionListener::OnCraftItem(const RawMessageData& rawMsgData,
@@ -422,8 +435,7 @@ void ActionListener::OnCraftItem(const RawMessageData& rawMsgData,
     throw std::runtime_error("Unable to craft without Actor attached");
   }
 
-  auto recipeData = recipeUsed->GetData(cache);
-  UseCraftRecipe(me, recipeData, br, espmIdx);
+  UseCraftRecipe(me, recipeUsed, cache, br, espmIdx);
 }
 
 void ActionListener::OnHostAttempt(const RawMessageData& rawMsgData,
diff --git a/skymp5-server/cpp/server_guest_lib/MpActor.cpp b/skymp5-server/cpp/server_guest_lib/MpActor.cpp
index e25ab602a5..63e7d1a8da 100644
--- a/skymp5-server/cpp/server_guest_lib/MpActor.cpp
+++ b/skymp5-server/cpp/server_guest_lib/MpActor.cpp
@@ -602,8 +602,7 @@ void MpActor::MpApiDeath(MpActor* killer)
   simdjson::dom::parser parser;
   bool isRespawnBlocked = false;
 
-  std::string s =
-    "[" + std::to_string(killer ? killer->GetFormId() : 0) + " ]";
+  std::string s = "[" + std::to_string(killer ? killer->GetFormId() : 0) + "]";
   auto args = parser.parse(s).value();
 
   if (auto wst = GetParent()) {
@@ -614,11 +613,34 @@ void MpActor::MpApiDeath(MpActor* killer)
       };
     }
   }
+
   if (!isRespawnBlocked) {
     RespawnWithDelay();
   }
 }
 
+bool MpActor::MpApiCraft(uint32_t craftedItemBaseId, uint32_t count,
+                         uint32_t recipeId)
+{
+  simdjson::dom::parser parser;
+  bool isCraftBlocked = false;
+
+  std::string s = "[" + std::to_string(craftedItemBaseId) + "," +
+    std::to_string(count) + "," + std::to_string(recipeId) + "]";
+  auto args = parser.parse(s).value();
+
+  if (auto wst = GetParent()) {
+    const auto id = GetFormId();
+    for (auto& listener : wst->listeners) {
+      if (listener->OnMpApiEvent("onCraft", args, id) == false) {
+        isCraftBlocked = true;
+      };
+    }
+  }
+
+  return !isCraftBlocked;
+}
+
 void MpActor::EatItem(uint32_t baseId, espm::Type t)
 {
   auto espmProvider = GetParent();
diff --git a/skymp5-server/cpp/server_guest_lib/MpActor.h b/skymp5-server/cpp/server_guest_lib/MpActor.h
index c3ec7d06cf..b327f85de2 100644
--- a/skymp5-server/cpp/server_guest_lib/MpActor.h
+++ b/skymp5-server/cpp/server_guest_lib/MpActor.h
@@ -130,6 +130,9 @@ class MpActor : public MpObjectReference
 
   void EquipBestWeapon();
 
+  bool MpApiCraft(uint32_t craftedItemBaseId, uint32_t count,
+                  uint32_t recipeId);
+
 private:
   struct Impl;
   std::shared_ptr<Impl> pImpl;