Add maphack privilege for advanced blocks like command blocks

README.md

@@ -60,9 +60,7 @@ The following items are interesting for Creative Mode and for adventure
 map builders. They can not be obtained in-game or in the creative inventory.
 
 * Barrier: `mcl_core:barrier`
-* Command Block: `mesecons_commandblock:commandblock_off`
-* Monster Spawner: `mcl_mobspawners:spawner`
-* Minecart with Command Block: `mcl_minecarts:command_block_minecart`
+* Minecart with Command Block (does not work yet): `mcl_minecarts:command_block_minecart`
 
 Use the `/giveme` chat command to obtain them. See the in-game help for
 an explanation.

mods/ITEMS/REDSTONE/mesecons_commandblock/init.lua

@@ -106,6 +106,11 @@ local on_rightclick = function(pos, node, player, itemstack, pointed_thing)
 	if not minetest.settings:get_bool("creative_mode") then
 		return
 	end
+	local privs = minetest.get_player_privs(player:get_player_name())
+	if not privs.maphack then
+		minetest.chat_send_player(player:get_player_name(), "Access denied. You need the “maphack” privilege to edit command blocks.")
+		return
+	end
 
 	local meta = minetest.get_meta(pos)
 	local commands = meta:get_string("commands")
@@ -118,6 +123,28 @@ local on_rightclick = function(pos, node, player, itemstack, pointed_thing)
 	minetest.show_formspec(player:get_player_name(), "commandblock_"..pos.x.."_"..pos.y.."_"..pos.z, formspec)
 end
 
+local on_place = function(itemstack, placer, pointed_thing)
+	if pointed_thing.type ~= "node" then
+		return itemstack
+	end
+
+	-- Use pointed node's on_rightclick function first, if present
+	local node = minetest.get_node(pointed_thing.under)
+	if placer and not placer:get_player_control().sneak then
+		if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
+			return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
+		end
+	end
+
+	local privs = minetest.get_player_privs(placer:get_player_name())
+	if not privs.maphack then
+		minetest.chat_send_player(placer:get_player_name(), "Placement denied. You need the “maphack” privilege to place command blocks.")
+		return itemstack
+	end
+
+	return minetest.item_place_node(itemstack, placer, pointed_thing)
+end
+
 minetest.register_node("mesecons_commandblock:commandblock_off", {
 	description = "Command Block",
 
@@ -134,11 +161,12 @@ You can optionally use the following placeholders in your commands:
 • “@random” is replaced by the name of a random player currently connected]],
 
 	tiles = {{name="jeija_commandblock_off.png", animation={type="vertical_frames", aspect_w=32, aspect_h=32, length=2}}},
-	groups = {creative_breakable=1, mesecon_effector_off=1, not_in_creative_inventory=1},
+	groups = {creative_breakable=1, mesecon_effector_off=1},
 	drop = "",
 	on_blast = function() end,
 	on_construct = construct,
 	is_ground_content = false,
+	on_place = on_place,
 	after_place_node = after_place,
 	on_rightclick = on_rightclick,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
@@ -157,6 +185,7 @@ minetest.register_node("mesecons_commandblock:commandblock_on", {
 	on_blast = function() end,
 	on_construct = construct,
 	is_ground_content = false,
+	on_place = on_place,
 	after_place_node = after_place,
 	on_rightclick = on_rightclick,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
@@ -173,6 +202,12 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		if not fields.submit and not fields.doc then
 			return
 		end
+		local privs = minetest.get_player_privs(player:get_player_name())
+		if not privs.maphack then
+			minetest.chat_send_player(player:get_player_name(), "Access denied. You need the “maphack” privilege to edit command blocks.")
+			return
+		end
+
 		if fields.doc and minetest.get_modpath("doc") then
 			doc.show_entry(player:get_player_name(), "nodes", "mesecons_commandblock:commandblock_off", true)
 			return

mods/ITEMS/mcl_core/nodes_misc.lua

@@ -142,6 +142,28 @@ minetest.register_node("mcl_core:barrier", {
 			playername = placer:get_player_name()
 		})
 	end,
+	on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+
+		-- Use pointed node's on_rightclick function first, if present
+		local node = minetest.get_node(pointed_thing.under)
+		if placer and not placer:get_player_control().sneak then
+			if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
+				return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
+			end
+		end
+
+		local name = placer:get_player_name()
+		local privs = minetest.get_player_privs(name)
+		if not privs.maphack then
+			minetest.chat_send_player(name, "Placement denied. You need the “maphack” privilege to place barriers.")
+			return itemstack
+		end
+		local new_itemstack = minetest.item_place(itemstack, placer, pointed_thing)
+		return new_itemstack
+	end,
 })
 
 -- Same as barrier, but non-pointable. This node is only to be used internally to separate realms.

mods/ITEMS/mcl_mobspawners/init.lua

@@ -216,12 +216,30 @@ minetest.register_node("mcl_mobspawners:spawner", {
 	walkable = true,
 	description = S("Monster Spawner"),
 	_doc_items_longdesc = S("A monster spawner is a block which regularily causes monsters and animals to appear around it."),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, material_stone=1},
+	groups = {pickaxey=1, material_stone=1, deco_block=1},
 	is_ground_content = false,
 	drop = "",
 
 	-- If placed by player, setup spawner with default settings
 	on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+
+		-- Use pointed node's on_rightclick function first, if present
+		local node = minetest.get_node(pointed_thing.under)
+		if placer and not placer:get_player_control().sneak then
+			if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
+				return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
+			end
+		end
+
+		local name = placer:get_player_name()
+		local privs = minetest.get_player_privs(name)
+		if not privs.maphack then
+			minetest.chat_send_player(name, "Placement denied. You need the “maphack” privilege to place monster spawners.")
+			return itemstack
+		end
 		local node_under = minetest.get_node(pointed_thing.under)
 		local new_itemstack, success = minetest.item_place(itemstack, placer, pointed_thing)
 		if success then

mods/MISC/mcl_privs/description.txt

@@ -0,0 +1 @@
+Shared privileges in MineClone 2

mods/MISC/mcl_privs/init.lua

@@ -0,0 +1,3 @@
+minetest.register_privilege("maphack", {
+	description = "Can place and use advanced blocks like monster spawners, command blocks and barriers.",
+})