From e82cd6e4eb78a163b6a72fc1729804e69f1b7601 Mon Sep 17 00:00:00 2001
From: HaoTNN <haotnn@gmail.com>
Date: Tue, 2 Jun 2015 17:26:21 -0700
Subject: Fixes multiple furnace issues, including from loading world storage

---
 CONTRIBUTORS                        |  1 +
 src/BlockEntities/FurnaceEntity.cpp | 43 +++++++++++++++++++++++++------------
 src/BlockEntities/FurnaceEntity.h   |  8 +++++++
 src/WorldStorage/WSSAnvil.cpp       |  5 +++--
 4 files changed, 41 insertions(+), 16 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 4dc357ab3..cd84a8dd5 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -8,6 +8,7 @@ derouinw
 Diusrex
 Duralex
 FakeTruth (founder)
+HaoTNN
 Howaner
 jasperarmstrong
 keyboard
diff --git a/src/BlockEntities/FurnaceEntity.cpp b/src/BlockEntities/FurnaceEntity.cpp
index 828eff284..d1588160d 100644
--- a/src/BlockEntities/FurnaceEntity.cpp
+++ b/src/BlockEntities/FurnaceEntity.cpp
@@ -32,7 +32,8 @@ cFurnaceEntity::cFurnaceEntity(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTY
 	m_NeedCookTime(0),
 	m_TimeCooked(0),
 	m_FuelBurnTime(0),
-	m_TimeBurned(0)
+	m_TimeBurned(0),
+	m_IsLoading(false)
 {
 	m_Contents.AddListener(*this);
 }
@@ -178,21 +179,15 @@ void cFurnaceEntity::BurnNewFuel(void)
 {
 	cFurnaceRecipe * FR = cRoot::Get()->GetFurnaceRecipe();
 	int NewTime = FR->GetBurnTime(m_Contents.GetSlot(fsFuel));
-	if (NewTime == 0)
+	if ((NewTime == 0) || !CanCookInputToOutput())
 	{
 		// The item in the fuel slot is not suitable
+		// or the input and output isn't available for cooking
 		SetBurnTimes(0, 0);
 		SetIsCooking(false);
 		return;
 	}
 
-	// Is the input and output ready for cooking?
-	if (!CanCookInputToOutput())
-	{
-		SetBurnTimes(0, 0);
-		return;
-	}
-
 	// Burn one new fuel:
 	SetBurnTimes(NewTime, 0);
 	SetIsCooking(true);
@@ -219,6 +214,11 @@ void cFurnaceEntity::OnSlotChanged(cItemGrid * a_ItemGrid, int a_SlotNum)
 		return;
 	}
 
+	if (m_IsLoading)
+	{
+		return;
+	}
+
 	ASSERT(a_ItemGrid == &m_Contents);
 	switch (a_SlotNum)
 	{
@@ -239,7 +239,10 @@ void cFurnaceEntity::UpdateInput(void)
 	if (!m_Contents.GetSlot(fsInput).IsEqual(m_LastInput))
 	{
 		// The input is different from what we had before, reset the cooking time
-		m_TimeCooked = 0;
+		if (!m_IsLoading)
+		{
+			m_TimeCooked = 0;
+		}
 	}
 	m_LastInput = m_Contents.GetSlot(fsInput);
 
@@ -254,13 +257,17 @@ void cFurnaceEntity::UpdateInput(void)
 	else
 	{
 		m_NeedCookTime = m_CurrentRecipe->CookTime;
-		SetIsCooking(true);
 
 		// Start burning new fuel if there's no flame now:
 		if (GetFuelBurnTimeLeft() <= 0)
 		{
 			BurnNewFuel();
 		}
+		// Already burning, set cooking to ensure that cooking is occuring
+		else
+		{
+			SetIsCooking(true);
+		}
 	}
 }
 
@@ -294,11 +301,19 @@ void cFurnaceEntity::UpdateOutput(void)
 		return;
 	}
 
-	// No need to burn new fuel, the Tick() function will take care of that
-
 	// Can cook, start cooking if not already underway:
 	m_NeedCookTime = m_CurrentRecipe->CookTime;
-	SetIsCooking(m_FuelBurnTime > 0);
+
+	// Check if fuel needs to start a burn
+	if (GetFuelBurnTimeLeft() <= 0)
+	{
+		BurnNewFuel();
+	}
+	// Already burning, set cooking to ensure that cooking is occuring
+	else
+	{
+		SetIsCooking(true);
+	}
 }
 
 
diff --git a/src/BlockEntities/FurnaceEntity.h b/src/BlockEntities/FurnaceEntity.h
index 8b3ba3e36..8734d763c 100644
--- a/src/BlockEntities/FurnaceEntity.h
+++ b/src/BlockEntities/FurnaceEntity.h
@@ -101,6 +101,11 @@ public:
 		m_TimeCooked = a_TimeCooked;
 	}
 	
+	void SetLoading(bool a_IsLoading)
+	{
+		m_IsLoading = a_IsLoading;
+	}
+
 protected:
 	
 	/** Block meta of the block currently represented by this entity */
@@ -129,6 +134,9 @@ protected:
 
 	/** Amount of ticks that the current fuel has been burning */
 	int m_TimeBurned;
+
+	/** Is the block currently being loaded into the world? */
+	bool m_IsLoading;
 	
 	/** Sends the specified progressbar value to all clients of the window */
 	void BroadcastProgress(short a_ProgressbarID, short a_Value);
diff --git a/src/WorldStorage/WSSAnvil.cpp b/src/WorldStorage/WSSAnvil.cpp
index 392b9bf83..8ca49c2c0 100755
--- a/src/WorldStorage/WSSAnvil.cpp
+++ b/src/WorldStorage/WSSAnvil.cpp
@@ -1052,7 +1052,8 @@ cBlockEntity * cWSSAnvil::LoadFurnaceFromNBT(const cParsedNBT & a_NBT, int a_Tag
 	}
 	
 	std::unique_ptr<cFurnaceEntity> Furnace(new cFurnaceEntity(a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, m_World));
-	
+	Furnace->SetLoading(true);
+
 	// Load slots:
 	for (int Child = a_NBT.GetFirstChild(Items); Child != -1; Child = a_NBT.GetNextSibling(Child))
 	{
@@ -1085,9 +1086,9 @@ cBlockEntity * cWSSAnvil::LoadFurnaceFromNBT(const cParsedNBT & a_NBT, int a_Tag
 		// Anvil doesn't store the time that an item takes to cook. We simply use the default - 10 seconds (200 ticks)
 		Furnace->SetCookTimes(200, ct);
 	}
-	
 	// Restart cooking:
 	Furnace->ContinueCooking();
+	Furnace->SetLoading(false);
 	return Furnace.release();
 }
 
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