2 files changed, 152 insertions, 3 deletions

diff --git a/source/Entities/Player.cpp b/source/Entities/Player.cpp
index 2e4199629..098417dc5 100644
--- a/source/Entities/Player.cpp
+++ b/source/Entities/Player.cpp
@@ -1,4 +1,4 @@
-
+
 #include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
 
 #include "Player.h"
@@ -33,6 +33,7 @@
 
 
 
+
 cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName)
 	: super(etPlayer, 0.6, 1.8)
 	, m_GameMode(eGameMode_NotSet)
@@ -65,6 +66,7 @@ cPlayer::cPlayer(cClientHandle* a_Client, const AString & a_PlayerName)
 	, m_EatingFinishTick(-1)
 	, m_IsChargingBow(false)
 	, m_BowCharge(0)
+	, m_XpTotal(0)
 {
 	LOGD("Created a player object for \"%s\" @ \"%s\" at %p, ID %d", 
 		a_PlayerName.c_str(), a_Client->GetIPString().c_str(),
@@ -260,6 +262,108 @@ void cPlayer::Tick(float a_Dt, cChunk & a_Chunk)
 
 
 
+int cPlayer::CalcLevelFromXp(int a_XpTotal)
+{
+	//level 0 to 15
+	if(a_XpTotal <= XP_TO_LEVEL15)
+	{
+		return a_XpTotal / XP_PER_LEVEL_TO15;
+	}
+
+	//level 30+
+	if(a_XpTotal > XP_TO_LEVEL30)
+	{
+		return (int) (151.5 + sqrt( 22952.25 - (14 * (2220 - a_XpTotal)))) / 7;
+	}
+
+	//level 16 to 30
+	return (int) ( 29.5 + sqrt( 870.25 - (6 * ( 360 - a_XpTotal )))) / 3;
+}
+
+
+
+
+
+int cPlayer::XpForLevel(int a_Level)
+{
+	//level 0 to 15
+	if(a_Level <= 15)
+	{
+		return a_Level * XP_PER_LEVEL_TO15;
+	}
+
+	//level 30+
+	if(a_Level >= 31)
+	{
+		return (int) ( (3.5 * a_Level * a_Level) - (151.5 * a_Level) + 2220 );
+	}
+
+	//level 16 to 30
+	return (int) ( (1.5 * a_Level * a_Level) - (29.5 * a_Level) + 360 );
+}
+
+
+
+
+
+int cPlayer::XpGetLevel()
+{
+	return CalcLevelFromXp(m_XpTotal);
+}
+
+
+
+
+
+float cPlayer::XpGetPercentage()
+{
+	int currentLevel = CalcLevelFromXp(m_XpTotal);
+
+	return (float)m_XpTotal / (float)XpForLevel(1+currentLevel);
+}
+
+
+
+
+
+bool cPlayer::SetExperience(int a_XpTotal)
+{
+	if(!(a_XpTotal >= 0) || (a_XpTotal > (INT_MAX - m_XpTotal)))
+	{
+		LOGWARNING("Tried to update experiece with an invalid Xp value: %d", a_XpTotal);
+		return false; //oops, they gave us a dodgey number
+	}
+
+	m_XpTotal = a_XpTotal;
+
+	return true;
+}
+
+
+
+
+
+int cPlayer::AddExperience(int a_Xp_delta)
+{
+	if(a_Xp_delta < 0)
+	{
+		//value was negative, abort and report
+		LOGWARNING("Attempt was made to increment Xp by %d, must be positive",
+			a_Xp_delta);
+		return -1; //should we instead just return the current Xp?
+	}
+	
+	LOGD("Player \"%s\" earnt %d experience", m_PlayerName.c_str(), a_Xp_delta);
+
+	m_XpTotal += a_Xp_delta;
+
+	return m_XpTotal;
+}
+
+
+
+
+
 void cPlayer::StartChargingBow(void)
 {
 	LOGD("Player \"%s\" started charging their bow", m_PlayerName.c_str());
@@ -1278,7 +1382,7 @@ bool cPlayer::LoadFromDisk()
 		LOGWARNING("Cannot read player data from file \"%s\"", SourceFile.c_str()); 
 		return false;
 	}
-	f.Close();
+	f.Close(); //cool kids play nice
 
 	Json::Value root;
 	Json::Reader reader;
@@ -1314,6 +1418,8 @@ bool cPlayer::LoadFromDisk()
 	m_FoodTickTimer       = root.get("foodTickTimer",  0).asInt();
 	m_FoodExhaustionLevel = root.get("foodExhaustion", 0).asDouble();
 
+	SetExperience(root.get("experience", 0).asInt());
+
 	m_GameMode = (eGameMode) root.get("gamemode", eGameMode_NotSet).asInt();
 	
 	m_Inventory.LoadFromJson(root["inventory"]);
@@ -1354,6 +1460,7 @@ bool cPlayer::SaveToDisk()
 	root["rotation"]       = JSON_PlayerRotation;
 	root["inventory"]      = JSON_Inventory;
 	root["health"]         = m_Health;
+	root["experience"]     = m_XpTotal;
 	root["air"]            = m_AirLevel;
 	root["food"]           = m_FoodLevel;
 	root["foodSaturation"] = m_FoodSaturationLevel;
diff --git a/source/Entities/Player.h b/source/Entities/Player.h
index 01efa3681..ab2f94d4c 100644
--- a/source/Entities/Player.h
+++ b/source/Entities/Player.h
@@ -63,6 +63,31 @@ public:
 	
 	/// Returns the currently equipped boots; empty item if none
 	virtual cItem GetEquippedBoots(void) const override { return m_Inventory.GetEquippedBoots(); }
+
+
+	// tolua_begin
+
+	/** Sets the experience total
+	Returns true on success
+	"should" really only be called at init or player death, plugins excepted
+	*/
+	bool SetExperience(int a_XpTotal);
+
+	/* Adds Xp, "should" not inc more than MAX_EXPERIENCE_ORB_SIZE unless you're a plugin being funny, *cough* cheating
+	Returns the new total experience, -1 on error
+	*/
+	int AddExperience(int a_Xp_delta);
+
+	/// Gets the experience total - XpTotal
+	inline int XpGetTotal(void) { return m_XpTotal; }
+
+	/// Gets the current level - XpLevel
+	int XpGetLevel(void);
+
+	/// Gets the experience bar percentage - XpP
+	float XpGetPercentage(void);
+
+	// tolua_end
 	
 	/// Starts charging the equipped bow
 	void StartChargingBow(void);
@@ -289,7 +314,7 @@ public:
 	virtual bool IsSubmerged(void) const{ return m_IsSubmerged; }
 
 	// tolua_end
-	
+
 	// cEntity overrides:
 	virtual bool IsCrouched (void) const { return m_IsCrouched; }
 	virtual bool IsSprinting(void) const { return m_IsSprinting; }
@@ -308,6 +333,14 @@ protected:
 	std::string m_PlayerName;
 	std::string m_LoadedWorldName;
 
+	/// Xp Level stuff
+	enum 
+	{
+		XP_TO_LEVEL15 = 255,
+		XP_PER_LEVEL_TO15 = 17,
+		XP_TO_LEVEL30 = 825
+	} ;
+
 	/// Player's air level (for swimming)
 	int m_AirLevel;
 
@@ -378,6 +411,15 @@ protected:
 
 	/// The world tick in which eating will be finished. -1 if not eating
 	Int64 m_EatingFinishTick;
+
+	/// Player Xp level
+	int m_XpTotal;
+
+	/// Caculates the Xp needed for a given level, ref: http://minecraft.gamepedia.com/XP
+	static int XpForLevel(int a_Level);
+
+	/// inverse of XpAtLevel, ref: http://minecraft.gamepedia.com/XP values are as per this with pre-calculations
+	static int CalcLevelFromXp(int a_XpTotal);
 	
 	bool m_IsChargingBow;
 	int  m_BowCharge;