add more API options, add ability to dig actionblock by sneak-punching

README.md

@@ -7,8 +7,9 @@ You punch a gold block that's next to Mese to teleport 100 meters in the
 direction that the Mese is located relative to the gold block. Each
 additional Mese added in a straight line adds an additional 100 meters.
 You can also add Mese to multiple sides in such a way to go in diagonal
-directions! However, Mese on opposing sides cancel each other. Thanks to
-oscar14 for the Gold-Mese-Transport idea!
+directions! However, Mese on opposing sides cancel each other.
+
+Sneak-punching the gold block will allow it to be dug normally.
 
 If Mineclone2 is installed, this mod will instead use gold blocks and Redstone blocks for teleportation.
 
@@ -18,10 +19,18 @@ If neither of these mods are is not installed, another mod will need to use mese
 
 ``meseport.register_actionblock(node_name)`` - A method that sets a particular node type to trigger a meseport teleport when punched. When the default mod is installed it will automatically be called with ``meseport.register_actionblock("default:goldblock")``.
 
-``meseport.nodepowers`` - A table that determines how far an adjacent node of a particular type will send the puncher. For example, when the default mod is installed this table will be:
+``meseport.unregister_actionblock(node_name)`` - The opposite of the above, unregisters a particular node type and restores its old behaviour.
+
+``meseport.register_nodepower(node_name, power_level)`` - Determines how far an adjacent node of a particular type will send the puncher. Setting a power_level of ``nil`` or ``false`` will disable this node's use with this mod. Setting it to 0 means it can still be part of the chain of nodes that determine the actionblock's teleport range but won't contribute to it.
+
+``meseport.nodepowers`` - The table storing registered nodepowers. For example, when the default mod is installed this table will be:
 
 	{
 		["default:mese"] = 100
 	}
 
+Use ``meseport.register_nodepower`` to modify the values here.
+
 ### License: CC0
+
+Thanks to oscar14 for the Gold-Mese-Transport idea!

init.lua

@@ -7,6 +7,17 @@ local Polarities = {-1, 1}
 meseport.nodepowers = {}
 local NodePowers = meseport.nodepowers
 
+meseport.register_nodepower = function(node_name, power_level)
+	assert(minetest.registered_nodes[node_name] ~= nil)
+	
+	if power_level == nil or power_level == false then
+		meseport.nodepowers[node_name] = nil
+		return
+	end
+	assert(type(power_level) == "number")
+	meseport.nodepowers[node_name] = power_level
+end
+
 meseport.register_actionblock = function(ActionBlockType)
 	local action_block_def = minetest.registered_nodes[ActionBlockType]
 	assert(action_block_def ~= nil)
@@ -14,7 +25,7 @@ meseport.register_actionblock = function(ActionBlockType)
 	
 	minetest.override_item(ActionBlockType, {
 		on_punch = function(pos, node, puncher, pointed_thing)
-			if not PunchDebounces[puncher] then
+			if not PunchDebounces[puncher] and not puncher:get_player_control()["sneak"] then
 				local power = {x = 0, y = 0, z = 0}
 				local readPos = {x = pos.x, y = pos.y, z = pos.z}
 				
@@ -44,11 +55,28 @@ meseport.register_actionblock = function(ActionBlockType)
 	
 			return on_punch_old(pos, node, puncher, pointed_thing) -- Added to avoid conflicts with other mods.
 		end,
+		
+		_meseport_on_punch_old = on_punch_old,
 	})
 end
 
+meseport.unregister_actionblock = function(ActionBlockType)
+	local action_block_def = minetest.registered_nodes[ActionBlockType]
+	assert(action_block_def ~= nil)
+	local on_punch_old = action_block_def._meseport_on_punch_old
+	if on_punch_old == nil then
+		return -- was never registered
+	end
+	
+	minetest.override_item(ActionBlockType, {
+		on_punch = on_punch_old,
+	})	
+end
+	
+	
+
 if minetest.get_modpath("default") then
-	meseport.nodepowers["default:mese"] = 100
+	meseport.register_nodepower("default:mese", 100)
 	meseport.register_actionblock("default:goldblock")
 end
 
@@ -56,6 +84,6 @@ if minetest.get_modpath("mcl_core")
 	and minetest.get_modpath("mesecons_torch")
 	and minetest.registered_nodes["mesecons_torch:redstoneblock"] then
 
+	meseport.register_nodepower("mesecons_torch:redstoneblock", 100)
 	meseport.register_actionblock("mcl_core:goldblock")
-	meseport.nodepowers["mesecons_torch:redstoneblock"] = 100
 end