[Dehardcode] Allow miners do area guard

CREDITS.md

@@ -498,6 +498,7 @@ This page lists all the individual contributions to the project by their author.
   - Fix an issue where AI would select unreachable buildings and get stuck when looking for buildings like tank bunkers, bio reactors, etc
   - Prone speed customization
   - RadarInvisible for non-enemy house
+  - Allow miners do area guard
 - **tyuah8**:
   - Drive/Jumpjet/Ship/Teleport locomotor did not power on when it is un-piggybacked bugfix
   - Destroyed unit leaves sensors bugfix

docs/Fixed-or-Improved-Logics.md

@@ -1334,6 +1334,17 @@ MinimapColor=  ; integer - Red,Green,Blue
 
 ## Vehicles
 
+### Allow miners do area guard
+
+- In vanilla, when miners enter area guard mission, they immediately switch to harvest mission. Now you can make them perform area guard mission normally like other technos.
+  - We made it work only for miners controlled by the player, because this will prevent AI's miners from going work.
+
+In `rulesmd.ini`:
+```ini
+[SOMEVEHICLE]                      ; VehicleType
+Harvester.CanGuardArea=no          ; boolean
+```
+
 ### Bunker entering check dehardcode
 
 - In vanilla, vehicles entering tank bunkers are subject to a series of hardcoding restrictions, including having to have turrets, having to have weapons, and not having Hover speed types. Now you can skip these restrictions.
@@ -1350,7 +1361,6 @@ BunkerableAnyway=false     ; boolean
 Skipping checks with this feature doesn't mean that vehicles and tank bunkers will interact correctly. Following the simple checks performed by the provider of this feature, bunkerability is mainly determined by Locomotor. The details about locomotors' bunkerability can be found on [ModEnc](https://modenc.renegadeprojects.com/Bunkerable).
 ```
 
-
 ### Customizing crushing tilt and slowdown
 
 - Vehicles with `Crusher=true` and `OmniCrusher=true` / `MovementZone=CrusherAll` were hardcoded to tilt when crushing vehicles / walls respectively. This now obeys `TiltsWhenCrushes` but can be customized individually for these two scenarios using `TiltsWhenCrusher.Vehicles` and `TiltsWhenCrusher.Overlays`, which both default to `TiltsWhenCrushes`.

docs/Whats-New.md

@@ -370,6 +370,7 @@ New:
 - Customize airstrike targets (by NetsuNegi)
 - Aggressive attack move mission (by CrimRecya)
 - Amphibious access vehicle (by CrimRecya)
+- Allow miners do area guard (by TaranDahl)
 
 Vanilla fixes:
 - Fixed sidebar not updating queued unit numbers when adding or removing units when the production is on hold (by CrimRecya)

src/Ext/TechnoType/Body.cpp

@@ -549,6 +549,8 @@ void TechnoTypeExt::ExtData::LoadFromINIFile(CCINIClass* const pINI)
 	this->Overload_ParticleSys.Read(exINI, pSection, "Overload.ParticleSys");
 	this->Overload_ParticleSysCount.Read(exINI, pSection, "Overload.ParticleSysCount");
 
+	this->Harvester_CanGuardArea.Read(exINI, pSection, "Harvester.CanGuardArea");
+
 	// Ares 0.2
 	this->RadarJamRadius.Read(exINI, pSection, "RadarJamRadius");
 
@@ -1016,6 +1018,8 @@ void TechnoTypeExt::ExtData::Serialize(T& Stm)
 		.Process(this->Overload_DeathSound)
 		.Process(this->Overload_ParticleSys)
 		.Process(this->Overload_ParticleSysCount)
+
+		.Process(this->Harvester_CanGuardArea)
 		;
 }
 void TechnoTypeExt::ExtData::LoadFromStream(PhobosStreamReader& Stm)

src/Ext/TechnoType/Body.h

@@ -343,6 +343,8 @@ class TechnoTypeExt
 		NullableIdx<VocClass> Overload_DeathSound;
 		Nullable<ParticleSystemTypeClass*> Overload_ParticleSys;
 		Valueable<int> Overload_ParticleSysCount;
+
+		Valueable<bool> Harvester_CanGuardArea;
 
 		ExtData(TechnoTypeClass* OwnerObject) : Extension<TechnoTypeClass>(OwnerObject)
 			, HealthBar_Hide { false }
@@ -641,6 +643,8 @@ class TechnoTypeExt
 			, Overload_DeathSound {}
 			, Overload_ParticleSys {}
 			, Overload_ParticleSysCount { 5 }
+
+			, Harvester_CanGuardArea { false }
 		{ }
 
 		virtual ~ExtData() = default;

src/Ext/Unit/Hooks.Harvester.cpp

@@ -1,4 +1,5 @@
 #include <UnitClass.h>
+#include <HouseClass.h>
 
 #include <Ext/TechnoType/Body.h>
 
@@ -19,3 +20,14 @@ DEFINE_HOOK(0x73E411, UnitClass_Mission_Unload_DumpAmount, 0x7)
 
 	return SkipGameCode;
 }
+
+DEFINE_HOOK(0x4D6D34, FootClass_MissionAreaGuard_Miner, 0x5)
+{
+	enum { GoGuardArea = 0x4D6D69 };
+
+	GET(FootClass*, pThis, ESI);
+
+	auto const pTypeExt = TechnoTypeExt::ExtMap.Find(pThis->GetTechnoType());
+
+	return pTypeExt->Harvester_CanGuardArea && pThis->Owner->IsControlledByHuman() ? GoGuardArea : 0;
+}