mcl_protector/init.lua

minetest.register_privilege("delprotect","Ignore player protection")

-- get static spawn position
local statspawn = (minetest.setting_get_pos("static_spawnpoint") or {x = 0, y = 2, z = 0})

protector = {}
protector.mod = "redo"
protector.radius = (tonumber(minetest.setting_get("protector_radius")) or 5)
protector.pvp = minetest.setting_get("protector_pvp") or false
protector.spawn = (tonumber(minetest.setting_get("protector_pvp_spawn")) or 0)

protector.get_member_list = function(meta)
	return meta:get_string("members"):split(" ")
end

protector.set_member_list = function(meta, list)
	meta:set_string("members", table.concat(list, " "))
end

protector.is_member = function (meta, name)
	for _, n in ipairs(protector.get_member_list(meta)) do
		if n == name then
			return true
		end
	end
	return false
end

protector.add_member = function(meta, name)
	if protector.is_member(meta, name) then return end
	local list = protector.get_member_list(meta)
	table.insert(list, name)
	protector.set_member_list(meta,list)
end

protector.del_member = function(meta, name)
	local list = protector.get_member_list(meta)
	for i, n in ipairs(list) do
		if n == name then
			table.remove(list, i)
			break
		end
	end
	protector.set_member_list(meta, list)
end

-- Protector Interface

protector.generate_formspec = function(meta)

	local formspec = "size[8,7]"
		..default.gui_bg..default.gui_bg_img..default.gui_slots
		.."label[2.5,0;-- Protector interface --]"
		.."label[0,1;PUNCH node to show protected area or USE for area check]"
		.."label[0,2;Members: (type player name then press Enter to add)]"

	local members = protector.get_member_list(meta)
	local npp = 12
	local i = 0
	for _, member in ipairs(members) do
			if i < npp then
				formspec = formspec .. "button[" .. (i % 4 * 2)
				.. "," .. math.floor(i / 4 + 3)
				.. ";1.5,.5;protector_member;" .. member .. "]"
				.. "button[" .. (i % 4 * 2 + 1.25) .. ","
				.. math.floor(i / 4 + 3)
				.. ";.75,.5;protector_del_member_" .. member .. ";X]"
			end
			i = i + 1
	end
	
	if i < npp then
		formspec = formspec .. "field[" .. (i % 4 * 2 + 1 / 3) .. ","
		.. (math.floor(i / 4 + 3) + 1 / 3) .. ";1.433,.5;protector_add_member;;]"
	end

	formspec = formspec .. "button_exit[2.5,6.2;3,0.5;close_me;Close]"

	return formspec
end

-- ACTUAL PROTECTION SECTION

-- Infolevel:
-- 0 for no info
-- 1 for "This area is owned by <owner> !" if you can't dig
-- 2 for "This area is owned by <owner>.
-- 3 for checking protector overlaps

protector.can_dig = function(r, pos, digger, onlyowner, infolevel)

	if not digger then
		return false
	end

	-- Delprotect privileged users can override protections

	if minetest.check_player_privs(digger, {delprotect = true})
	and infolevel == 1 then
		return true
	end

	if infolevel == 3 then infolevel = 1 end

	-- Find the protector nodes

	local positions = minetest.find_nodes_in_area(
		{x = pos.x - r, y = pos.y - r, z = pos.z - r},
		{x = pos.x + r, y = pos.y + r, z = pos.z + r},
		{"protector:protect", "protector:protect2"})

	local meta, owner, members
	for _, pos in ipairs(positions) do
		meta = minetest.get_meta(pos)
		owner = meta:get_string("owner")
		members = meta:get_string("members")

		if owner ~= digger then 
			if onlyowner or not protector.is_member(meta, digger) then
				if infolevel == 1 then
					minetest.chat_send_player(digger,
					"This area is owned by " .. owner .. " !")
				elseif infolevel == 2 then
					minetest.chat_send_player(digger,
					"This area is owned by " .. owner .. ".")
					minetest.chat_send_player(digger,
					"Protection located at: " .. minetest.pos_to_string(pos))
					if members ~= "" then
						minetest.chat_send_player(digger,
						"Members: " .. members .. ".")
					end
				end
				return false
			end
		end

		if infolevel == 2 then
			minetest.chat_send_player(digger,
			"This area is owned by " .. owner .. ".")
			minetest.chat_send_player(digger,
			"Protection located at: " .. minetest.pos_to_string(positions[1]))
			if members ~= "" then
				minetest.chat_send_player(digger,
				"Members: " .. members .. ".")
			end
			break
		end

	end

	if infolevel == 2 then
		if #positions < 1 then
			minetest.chat_send_player(digger,
			"This area is not protected.")
		end
		minetest.chat_send_player(digger, "You can build here.")
	end

	return true
end

-- Can node be added or removed, if so return node else true (for protected)

protector.old_is_protected = minetest.is_protected

function minetest.is_protected(pos, digger)

	if not protector.can_dig(protector.radius, pos, digger, false, 1) then
-- hurt here
--player = minetest.get_player_by_name(digger)
--player:set_hp(player:get_hp()-2)
		return true
	end
	return protector.old_is_protected(pos, digger)

end

-- Make sure protection block doesn't overlap another protector's area

protector.old_node_place = minetest.item_place

function minetest.item_place(itemstack, placer, pointed_thing)

	if itemstack:get_name() == "protector:protect"
	or itemstack:get_name() == "protector:protect2" then
		local user = placer:get_player_name()
		if not protector.can_dig(protector.radius * 2, pointed_thing.above, user, true, 3) then
			minetest.chat_send_player(user,
			"Overlaps into another protected area")
			return protector.old_node_place(itemstack, placer, pointed_thing.above)
		end
	end

	return protector.old_node_place(itemstack, placer, pointed_thing)
end

-- END

--= Protection Block

minetest.register_node("protector:protect", {
	description = "Protection Block",
	tiles = {
		"moreblocks_circle_stone_bricks.png",
		"moreblocks_circle_stone_bricks.png",
		"moreblocks_circle_stone_bricks.png^protector_logo.png"
	},
	sounds = default.node_sound_stone_defaults(),
	groups = {dig_immediate = 2, unbreakable = 1},
	paramtype = "light",
	light_source = 2,

	after_place_node = function(pos, placer)
		local meta = minetest.get_meta(pos)
		meta:set_string("owner", placer:get_player_name() or "")
		meta:set_string("infotext", "Protection (owned by " .. meta:get_string("owner") .. ")")
		meta:set_string("members", "")
	end,

	on_use = function(itemstack, user, pointed_thing)
		if pointed_thing.type ~= "node" then return end
		protector.can_dig(protector.radius, pointed_thing.under, user:get_player_name(), false, 2)
	end,

	on_rightclick = function(pos, node, clicker, itemstack)
		local meta = minetest.get_meta(pos)
		if protector.can_dig(1, pos,clicker:get_player_name(), true, 1) then
			minetest.show_formspec(clicker:get_player_name(), 
			"protector:node_" .. minetest.pos_to_string(pos), protector.generate_formspec(meta))
		end
	end,

	on_punch = function(pos, node, puncher)
		if not protector.can_dig(1, pos, puncher:get_player_name(), true, 1) then
			return
		end
		minetest.add_entity(pos, "protector:display")
	end,

	can_dig = function(pos, player)
		return protector.can_dig(1, pos, player:get_player_name(), true, 1)
	end,
})

minetest.register_craft({
	output = "protector:protect 4",
	recipe = {
		{"default:stone", "default:stone", "default:stone"},
		{"default:stone", "default:steel_ingot", "default:stone"},
		{"default:stone", "default:stone", "default:stone"},
	}
})

--= Protection Logo

minetest.register_node("protector:protect2", {
	description = "Protection Logo",
	tiles = {"protector_logo.png"},
	wield_image = "protector_logo.png",
	inventory_image = "protector_logo.png",
	sounds = default.node_sound_stone_defaults(),
	groups = {dig_immediate = 2, unbreakable = 1},
	paramtype = 'light',
	paramtype2 = "wallmounted",
	light_source = 2,
	drawtype = "nodebox",
	sunlight_propagates = true,
	walkable = true,
	node_box = {
		type = "wallmounted",
		wall_top    = {-0.375, 0.4375, -0.5, 0.375, 0.5, 0.5},
		wall_bottom = {-0.375, -0.5, -0.5, 0.375, -0.4375, 0.5},
		wall_side   = {-0.5, -0.5, -0.375, -0.4375, 0.5, 0.375},
	},
	selection_box = {type = "wallmounted"},

	after_place_node = function(pos, placer)
		local meta = minetest.get_meta(pos)
		meta:set_string("owner", placer:get_player_name() or "")
		meta:set_string("infotext", "Protection (owned by " .. meta:get_string("owner") .. ")")
		meta:set_string("members", "")
	end,

	on_use = function(itemstack, user, pointed_thing)
		if pointed_thing.type ~= "node" then return end
		protector.can_dig(protector.radius, pointed_thing.under, user:get_player_name(), false, 2)
	end,

	on_rightclick = function(pos, node, clicker, itemstack)
		local meta = minetest.get_meta(pos)
		if protector.can_dig(1, pos, clicker:get_player_name(), true, 1) then
			minetest.show_formspec(clicker:get_player_name(), 
			"protector:node_" .. minetest.pos_to_string(pos), protector.generate_formspec(meta))
		end
	end,

	on_punch = function(pos, node, puncher)
		if not protector.can_dig(1, pos, puncher:get_player_name(), true, 1) then
			return
		end
		minetest.add_entity(pos, "protector:display")
	end,

	can_dig = function(pos, player)
		return protector.can_dig(1, pos, player:get_player_name(), true, 1)
	end,
})

minetest.register_craft({
	output = "protector:protect2 4",
	recipe = {
		{"default:stone", "default:stone", "default:stone"},
		{"default:stone", "default:copper_ingot", "default:stone"},
		{"default:stone", "default:stone", "default:stone"},
	}
})

-- If name entered or button press
minetest.register_on_player_receive_fields(function(player,formname,fields)

	if string.sub(formname, 0, string.len("protector:node_")) == "protector:node_" then

		local pos_s = string.sub(formname, string.len("protector:node_") + 1)
		local pos = minetest.string_to_pos(pos_s)
		local meta = minetest.get_meta(pos)

		if not protector.can_dig(1, pos, player:get_player_name(), true, 1) then
			return
		end

		if fields.protector_add_member then
			for _, i in ipairs(fields.protector_add_member:split(" ")) do
				protector.add_member(meta, i)
			end
		end

		for field, value in pairs(fields) do
			if string.sub(field, 0, string.len("protector_del_member_")) == "protector_del_member_" then
				protector.del_member(meta, string.sub(field,string.len("protector_del_member_") + 1))
			end
		end
		
		if not fields.close_me then
			minetest.show_formspec(player:get_player_name(), formname, protector.generate_formspec(meta))
		end

	end

end)

minetest.register_entity("protector:display", {
	physical = false,
	collisionbox = {0, 0, 0, 0, 0, 0},
	visual = "wielditem",
	-- wielditem seems to be scaled to 1.5 times original node size
	visual_size = {x = 1.0 / 1.5, y = 1.0 / 1.5},
	textures = {"protector:display_node"},
	on_activate = function(self, staticdata)
		if mobs and mobs.entity == false then self.object:remove() end
	end,
	on_step = function(self, dtime)
		self.timer = (self.timer or 0) + dtime
		if self.timer > 10 then
			self.object:remove()
		end
	end,
})

-- Display-zone node, Do NOT place the display as a node,
-- it is made to be used as an entity (see above)
local x = protector.radius
minetest.register_node("protector:display_node", {
	tiles = {"protector_display.png"},
	use_texture_alpha = true,
	walkable = false,
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {
			-- sides
			{-(x+.55), -(x+.55), -(x+.55), -(x+.45), (x+.55), (x+.55)},
			{-(x+.55), -(x+.55), (x+.45), (x+.55), (x+.55), (x+.55)},
			{(x+.45), -(x+.55), -(x+.55), (x+.55), (x+.55), (x+.55)},
			{-(x+.55), -(x+.55), -(x+.55), (x+.55), (x+.55), -(x+.45)},
			-- top
			{-(x+.55), (x+.45), -(x+.55), (x+.55), (x+.55), (x+.55)},
			-- bottom
			{-(x+.55), -(x+.55), -(x+.55), (x+.55), -(x+.45), (x+.55)},
			-- middle (surround protector)
			{-.55,-.55,-.55, .55,.55,.55},
		},
	},
	selection_box = {
		type = "regular",
	},
	paramtype = "light",
	groups = {dig_immediate = 3, not_in_creative_inventory = 1},
	drop = "",
})

-- Register Protected Doors

local function on_rightclick(pos, dir, check_name, replace, replace_dir, params)
	pos.y = pos.y+dir
	if not minetest.get_node(pos).name == check_name then
		return
	end
	local p2 = minetest.get_node(pos).param2
	p2 = params[p2 + 1]
		
	minetest.swap_node(pos, {name = replace_dir, param2 = p2})
		
	pos.y = pos.y-dir
	minetest.swap_node(pos, {name = replace, param2 = p2})

	local snd_1 = "doors_door_close"
	local snd_2 = "doors_door_open" 
	if params[1] == 3 then
		snd_1 = "doors_door_open"
		snd_2 = "doors_door_close"
	end

	if minetest.get_meta(pos):get_int("right") ~= 0 then
		minetest.sound_play(snd_1, {
			pos = pos, gain = 0.3, max_hear_distance = 10})
	else
		minetest.sound_play(snd_2, {
			pos = pos, gain = 0.3, max_hear_distance = 10})
	end
end

-- Protected Wooden Door

local name = "protector:door_wood"

doors.register_door(name, {
	description = "Protected Wooden Door",
	inventory_image = "doors_wood.png^protector_logo.png",
	groups = {
		snappy = 1, choppy = 2, oddly_breakable_by_hand = 2,
		door = 1, unbreakable = 1
	},
	tiles_bottom = {"doors_wood_b.png^protector_logo.png", "doors_brown.png"},
	tiles_top = {"doors_wood_a.png", "doors_brown.png"},
	sounds = default.node_sound_wood_defaults(),
	sunlight = false,
})

minetest.override_item(name .. "_b_1", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, 1,
			name .. "_t_1", name .. "_b_2", name .. "_t_2", {1, 2, 3, 0})
		end
	end,
})

minetest.override_item(name.."_t_1", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, -1,
			name .. "_b_1", name .. "_t_2", name .. "_b_2", {1, 2, 3, 0})
		end
	end,
})

minetest.override_item(name.."_b_2", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, 1,
			name .. "_t_2", name .. "_b_1", name .. "_t_1", {3, 0, 1, 2})
		end
	end,
})

minetest.override_item(name.."_t_2", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, -1,
			name .. "_b_2", name .. "_t_1", name .. "_b_1", {3, 0, 1, 2})
		end
	end,
})

minetest.register_craft({
	output = name,
	recipe = {
		{"group:wood", "group:wood"},
		{"group:wood", "default:copper_ingot"},
		{"group:wood", "group:wood"}
	}
})

minetest.register_craft({
	output = name,
	recipe = {
		{"doors:door_wood", "default:copper_ingot"}
	}
})

-- Protected Steel Door

local name = "protector:door_steel"

doors.register_door(name, {
	description = "Protected Steel Door",
	inventory_image = "doors_steel.png^protector_logo.png",
	groups = {
		snappy = 1, bendy = 2, cracky = 1,
		level = 2, door = 1, unbreakable = 1
	},
	tiles_bottom = {"doors_steel_b.png^protector_logo.png", "doors_grey.png"},
	tiles_top = {"doors_steel_a.png", "doors_grey.png"},
	sounds = default.node_sound_wood_defaults(),
	sunlight = false,
})

minetest.override_item(name.."_b_1", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, 1,
			name .. "_t_1", name .. "_b_2", name .. "_t_2", {1, 2, 3, 0})
		end
	end,
})

minetest.override_item(name.."_t_1", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, -1,
			name .. "_b_1", name .. "_t_2", name .. "_b_2", {1, 2, 3, 0})
		end
	end,
})

minetest.override_item(name.."_b_2", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, 1,
			name .. "_t_2", name .. "_b_1", name .. "_t_1", {3, 0, 1, 2})
		end
	end,
})

minetest.override_item(name.."_t_2", {
	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
			on_rightclick(pos, -1,
			name .. "_b_2", name .. "_t_1", name .. "_b_1", {3, 0, 1, 2})
		end
	end,
})

minetest.register_craft({
	output = name,
	recipe = {
		{"default:steel_ingot", "default:steel_ingot"},
		{"default:steel_ingot", "default:copper_ingot"},
		{"default:steel_ingot", "default:steel_ingot"}
	}
})

minetest.register_craft({
	output = name,
	recipe = {
		{"doors:door_steel", "default:copper_ingot"}
	}
})

-- Protected Chest

minetest.register_node("protector:chest", {
	description = "Protected Chest",
	tiles = {
		"default_chest_top.png", "default_chest_top.png",
		"default_chest_side.png", "default_chest_side.png",
		"default_chest_side.png", "default_chest_front.png^protector_logo.png"
	},
	paramtype2 = "facedir",
	groups = {choppy = 2, oddly_breakable_by_hand = 2, unbreakable = 1},
	legacy_facedir_simple = true,
	is_ground_content = false,
	sounds = default.node_sound_wood_defaults(),

	on_construct = function(pos)
		local meta = minetest.get_meta(pos)
		meta:set_string("infotext", "Protected Chest")
		meta:set_string("name", "")
		local inv = meta:get_inventory()
		inv:set_size("main", 8 * 4)
	end,

	can_dig = function(pos,player)
		local meta = minetest.get_meta(pos)
		local inv = meta:get_inventory()
		if inv:is_empty("main") then
			if not minetest.is_protected(pos, player:get_player_name()) then
				return true
			end
		end
	end,

	on_metadata_inventory_put = function(pos, listname, index, stack, player)
		minetest.log("action", player:get_player_name() ..
		" moves stuff to protected chest at " .. minetest.pos_to_string(pos))
	end,

	on_metadata_inventory_take = function(pos, listname, index, stack, player)
		minetest.log("action", player:get_player_name() ..
		" takes stuff from protected chest at " .. minetest.pos_to_string(pos))
	end,

	on_rightclick = function(pos, node, clicker)
		if not minetest.is_protected(pos, clicker:get_player_name()) then
		local meta = minetest.get_meta(pos)
		local spos = pos.x .. "," .. pos.y .. "," ..pos.z
		local formspec = "size[8,9]"..
			default.gui_bg..default.gui_bg_img..default.gui_slots
			.. "list[nodemeta:".. spos .. ";main;0,0.3;8,4;]"
			.. "button[0,4.5;2,0.25;toup;To Chest]"
			.. "field[2.3,4.8;4,0.25;chestname;;"
			.. meta:get_string("name") .. "]"
			.. "button[6,4.5;2,0.25;todn;To Inventory]"
			.. "list[current_player;main;0,5;8,1;]"
			.. "list[current_player;main;0,6.08;8,3;8]"
			.. "listring[nodemeta:" .. spos .. ";main]"
			.. "listring[current_player;main]"
			.. default.get_hotbar_bg(0,5)

			minetest.show_formspec(
				clicker:get_player_name(),
				"protector:chest_" .. minetest.pos_to_string(pos),
				formspec)
		end
	end,
})

-- Protected Chest formspec buttons

minetest.register_on_player_receive_fields(function(player, formname, fields)

	if string.sub(formname, 0, string.len("protector:chest_")) == "protector:chest_" then

		local pos_s = string.sub(formname,string.len("protector:chest_") + 1)
		local pos = minetest.string_to_pos(pos_s)
		local meta = minetest.get_meta(pos)
		local chest_inv = meta:get_inventory()
		local player_inv = player:get_inventory()

		if fields.toup then

			-- copy contents of players inventory to chest
			for i, v in ipairs (player_inv:get_list("main") or {}) do
				if (chest_inv and chest_inv:room_for_item('main', v)) then
					local leftover = chest_inv:add_item('main', v)
					player_inv:remove_item("main", v)
					if (leftover and not(leftover:is_empty())) then
						player_inv:add_item("main", v)
					end
				end
			end
	
		elseif fields.todn then

			-- copy contents of chest to players inventory
			for i, v in ipairs (chest_inv:get_list('main') or {}) do
				if (player_inv:room_for_item("main", v)) then
					local leftover = player_inv:add_item("main", v)
					chest_inv:remove_item('main', v)
					if( leftover and not(leftover:is_empty())) then
						chest_inv:add_item('main', v)
					end
				end
			end

		elseif fields.chestname then

			-- change chest infotext to display name
			if fields.chestname ~= "" then
				meta:set_string("name", fields.chestname)
				meta:set_string("infotext",
				"Protected Chest (" .. fields.chestname .. ")")
			else
				meta:set_string("infotext", "Protected Chest")
			end

		end
	end

end)

-- Protected Chest recipe

minetest.register_craft({
	output = 'protector:chest',
	recipe = {
		{'group:wood', 'group:wood', 'group:wood'},
		{'group:wood', 'default:copper_ingot', 'group:wood'},
		{'group:wood', 'group:wood', 'group:wood'},
	}
})

minetest.register_craft({
	output = 'protector:chest',
	recipe = {
		{'default:chest', 'default:copper_ingot', ''},
	}
})

-- Disable PVP in your own protected areas
if minetest.setting_getbool("enable_pvp") and protector.pvp == "true" then

	if minetest.register_on_punchplayer then

		minetest.register_on_punchplayer(
		function(player, hitter, time_from_last_punch, tool_capabilities, dir, damage)

			if not player or not hitter then
				print("on_punchplayer called with nil objects")
			end

			if not hitter:is_player() then
				return false
			end

			-- no pvp at spawn area
			local pos = player:getpos()
			if pos.x < statspawn.x + protector.spawn
			and pos.x > statspawn.x - protector.spawn
			and pos.y < statspawn.y + protector.spawn
			and pos.y > statspawn.y - protector.spawn
			and pos.z < statspawn.z + protector.spawn
			and pos.z > statspawn.z - protector.spawn then
				return true
			end

			if minetest.is_protected(pos, hitter:get_player_name()) then
				return true
			else
				return false
			end

		end)
	else
		print("PVP protection not active, update your version of Minetest")

	end
else
	print("PVP is disabled in world")
end