ProtectionAreas: Implemented reloading areas when a player moves

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1575 0a769ca7-a7f5-676a-18bf-c427514a06d6

MCServer/Plugins/ProtectionAreas/HookHandlers.lua

@@ -6,10 +6,12 @@
 
 
 
+--- Registers all the hooks that the plugin needs to know about
 function InitializeHooks(a_Plugin)
 	local PlgMgr = cRoot:Get():GetPluginManager();
 	PlgMgr:AddHook(a_Plugin, cPluginManager.HOOK_DISCONNECT);
 	PlgMgr:AddHook(a_Plugin, cPluginManager.HOOK_PLAYER_LEFT_CLICK);
+	PlgMgr:AddHook(a_Plugin, cPluginManager.HOOK_PLAYER_MOVING);
 	PlgMgr:AddHook(a_Plugin, cPluginManager.HOOK_PLAYER_RIGHT_CLICK);
 	PlgMgr:AddHook(a_Plugin, cPluginManager.HOOK_PLAYER_SPAWNED);
 end
@@ -18,6 +20,7 @@ end
 
 
 
+--- Called by MCS when a player's connectino is lost - either they disconnected or timed out
 function OnDisconnect(a_Player, a_Reason)
 	-- Remove the player's cProtectionArea object
 	-- TODO: What if there are two players with the same name? need to check
@@ -33,6 +36,7 @@ end;
 
 
 
+--- Called by MCS whenever a player enters a world (is spawned)
 function OnPlayerSpawned(a_Player)
 	-- Create a new cPlayerAreas object for this player
 	if (g_PlayerAreas[a_Player:GetUniqueID()] == nil) then
@@ -46,6 +50,29 @@ end
 
 
 
+--- Called by MCS whenever a player is moving (at most once every tick)
+function OnPlayerMoving(a_Player)
+	local PlayerID = a_Player:GetUniqueID();
+	
+	-- If for some reason we don't have a cPlayerAreas object for this player, load it up
+	local PlayerAreas = g_PlayerAreas[PlayerID];
+	if (PlayerAreas == nil) then
+		LoadPlayerAreas(a_Player);
+		return false;
+	end;
+	
+	-- If the player is outside their areas' safe space, reload
+	if (not(PlayerAreas:IsInSafe(a_Player:GetPosX(), a_Player:GetPosZ()))) then
+		LoadPlayerAreas(a_Player);
+	end
+	return false;
+end
+
+
+
+
+
+--- Called by MCS when a player left-clicks
 function OnPlayerLeftClick(a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_Status)
 	-- If the player has lclked with the wand; regardless of their permissions, let's set the coords:
 	if (cConfig:IsWand(a_Player:GetEquippedItem())) then
@@ -65,7 +92,8 @@ function OnPlayerLeftClick(a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace,
 	
 	-- Check the player areas to see whether to disable this action
 	local Areas = g_PlayerAreas[a_Player:GetUniqueID()];
-	if not(Areas:CanInteractWithBlock(a_BlockX, a_BlockY, a_BlockZ)) then
+	if not(Areas:CanInteractWithBlock(a_BlockX, a_BlockZ)) then
+		a_Player:SendMessage("You are not allowed to dig here!");
 		return true;
 	end
 	
@@ -77,17 +105,19 @@ end
 
 
 
+--- Called by MCS when a player right-clicks
 function OnPlayerRightClick(a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, a_CursorX, a_CursorY, a_CursorZ, a_Status)
+
+	-- BlockFace < 0 means "use item", for which the coords are not given by the client
+	if (a_BlockFace < 0) then
+		return true;
+	end
+
+	-- Convert the clicked coords into the block space
+	a_BlockX, a_BlockY, a_BlockZ = AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
+	
 	-- If the player has rclked with the wand; regardless of their permissions, let's set the coords
 	if (cConfig:IsWand(a_Player:GetEquippedItem())) then
-		-- BlockFace < 0 means "use item", for which the coords are not given by the client
-		if (a_BlockFace < 0) then
-			return true;
-		end
-
-		-- Convert the clicked coords into the block space
-		a_BlockX, a_BlockY, a_BlockZ = AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace);
-		
 		-- Set the coords in the CommandState
 		GetCommandStateForPlayer(a_Player):SetCoords2(a_BlockX, a_BlockZ);
 		a_Player:SendMessage("Coords2 set as {" .. a_BlockX .. ", " .. a_BlockZ .."}.");
@@ -97,6 +127,7 @@ function OnPlayerRightClick(a_Player, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace,
 	-- Check the player areas to see whether to disable this action
 	local Areas = g_PlayerAreas[a_Player:GetUniqueID()];
 	if not(Areas:CanInteractWithBlock(a_BlockX, a_BlockZ)) then
+		a_Player:SendMessage("You are not allowed to build here!");
 		return true;
 	end
 

MCServer/Plugins/ProtectionAreas/PlayerAreas.lua

@@ -9,7 +9,8 @@ The code can then ask each object, whether the player can interact with a certai
 A player can interact with a block if either one of these is true:
 1, There are no areas covering the block
 2, There is at least one area covering the block with IsAllowed set to true
-The OOP class implementation follows the PiL 16.1
+The object also has a m_SafeCuboid object that specified the area within which the player may move
+without the PlayerAreas needing a re-query.
 
 Also, a global table g_PlayerAreas is the actual map of PlayerID -> cPlayerAreas
 --]]
@@ -25,10 +26,16 @@ g_PlayerAreas = {};
 
 
 
-function cPlayerAreas:new(obj)
+function cPlayerAreas:new(a_SafeMinX, a_SafeMinZ, a_SafeMaxX, a_SafeMaxZ)
-	obj = obj or {};
+	assert(a_SafeMinX);
+	assert(a_SafeMinZ);
+	assert(a_SafeMaxX);
+	assert(a_SafeMaxZ);
+	
+	local obj = {};
 	setmetatable(obj, self);
 	self.__index = self;
+	self.m_SafeCuboid = cCuboid(a_SafeMinX, 0, a_SafeMinZ, a_SafeMaxX, 255, a_SafeMaxZ);
 	return obj;
 end
 
@@ -46,6 +53,8 @@ end
 
 --- returns true if the player owning this object can interact with the specified block
 function cPlayerAreas:CanInteractWithBlock(a_BlockX, a_BlockZ)
+	assert(self);
+	
 	-- iterate through all the stored areas:
 	local IsInsideAnyArea = false;
 	for idx, Area in ipairs(self) do
@@ -76,6 +85,8 @@ end
 -- a_Callback has a signature: function(a_Cuboid, a_IsAllowed)
 -- Returns true if all areas have been enumerated, false if the callback has aborted by returning true
 function cPlayerAreas:ForEachArea(a_Callback)
+	assert(self);
+	
 	for idx, Area in ipairs(self) do
 		if (a_Callback(Area.m_Cuboid, Area.m_IsAllowed)) then
 			return false;
@@ -87,3 +98,13 @@ end
 
 
 
+
+--- Returns true if the player is withing the safe cuboid (no need to re-query the areas)
+function cPlayerAreas:IsInSafe(a_BlockX, a_BlockZ)
+	assert(self);
+	return self.m_SafeCuboid:IsInside(a_BlockX, 0, a_BlockZ);
+end
+
+
+
+

MCServer/Plugins/ProtectionAreas/ProtectionAreas.lua

@@ -12,6 +12,9 @@ PluginPrefix = "ProtectionAreas: ";
 --- Bounds for the area loading. Areas less this far in any direction from the player will be loaded into cPlayerAreas
 g_AreaBounds = 48;
 
+--- If a player moves this close to the PlayerAreas bounds, the PlayerAreas will be re-queried
+g_AreaSafeEdge = 12;
+
 
 
 

MCServer/Plugins/ProtectionAreas/Storage.lua

@@ -192,7 +192,17 @@ function cStorage:LoadPlayerAreas(a_PlayerName, a_PlayerX, a_PlayerZ, a_WorldNam
 	local BoundsMinZ = a_PlayerZ - g_AreaBounds;
 	local BoundsMaxZ = a_PlayerZ + g_AreaBounds;
 
-	local res = cPlayerAreas:new();
+	local res = cPlayerAreas:new(
+		BoundsMinX + g_AreaSafeEdge, BoundsMinZ + g_AreaSafeEdge,
+		BoundsMaxX - g_AreaSafeEdge, BoundsMaxZ - g_AreaSafeEdge
+	);
+	
+	--[[
+	LOG("Loading protection areas for player " .. a_PlayerName .. " centered around {" .. a_PlayerX .. ", " .. a_PlayerZ ..
+		"}, bounds are {" .. BoundsMinX .. ", " .. BoundsMinZ .. "} - {" ..
+		BoundsMaxX .. ", " .. BoundsMaxZ .. "}"
+	);
+	--]]
 
 	-- Load the areas from the DB, based on the player's location
 	local sql =