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Add "areas" mod.

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README.md
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@ -79,10 +79,12 @@ The following mods are also included:
* [lightning][] ([LGPL/CC-BY-SA](mods/weather/lightning/README.md))
* [weather][] ([LGPL/WTFPL/CC-BY-SA](mods/weather/weather/README))
* world/
* [areas][] ([LGPL](mods/world/areas/LICENSE.txt))
* [worldedge][] ([DWYWPL](mods/world/worldedge/licence.txt))
[areas]: https://forum.minetest.net/viewtopic.php?t=7239
[3d_armor]: https://forum.minetest.net/viewtopic.php?t=4654
[adv_spawning]: https://github.com/sapier/adv_spawning
[animalmaterials]: https://github.com/sapier/animalmaterials

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mods/world/areas/LICENSE.txt Normal file
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GNU LESSER GENERAL PUBLIC LICENSE
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That's all there is to it!

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Areas mod for Minetest 0.4.8+
=============================
Configuration
-------------
If you wish to specify configuration options, such as whether players are
allowed to protect their own areas with the `protect` command (disabled by
default), you should check config.lua and set the appropriate settings in your
server's configuration file (probably `minetest.conf`).
Tutorial
--------
To protect an area you must first set the corner positions of the area.
In order to set the corner positions you can run:
* `/area_pos set` and punch the two corner nodes to set them.
* `/area_pos set1/set2` and punch only the first or second corner node to
set them one at a time.
* `/area_pos1/2` to set one of the positions to your current position.
* `/area_pos1/2 X Y Z` to set one of the positions to the specified
coordinates.
Once you have set the border positions you can protect the area by running one
of the following commands:
* `/set_owner <OwnerName> <AreaName>` -- If you have the `areas` privilege.
* `/protect <AreaName>` -- If you have the `areas` privilege or the server
administrator has enabled area self-protection.
The area name is used only for informational purposes (so that you know what
an area is for). It is not used for any other purpose.
For example: `/set_owner SomePlayer Mese city`
Now that you own an area you may want to add sub-owners to it. You can do this
with the `add_owner` command. Anyone with an area can use the `add_owner`
command on their areas. Before using the `add_owner` command you have to
select the corners of the sub-area as you did for `set_owner`. If your markers
are still around your original area and you want to grant access to your
entire area you will not have to re-set them. You can also use `select_area` to
place the markers at the corners of an existing area if you've reset your
markers and want to grant access to a full area.
The `add_owner` command expects three arguments:
1. The ID number of the parent area (the area that you want to add a
sub-area to).
2. The name of the player that will own the sub-area.
3. The name of the sub-area. (can contain spaces)
For example: `/add_owner 123 BobTheBuilder Diamond lighthouse`
Commands
--------
* `/protect <AreaName>` -- Protects an area for yourself. (if
self-protection is enabled)
* `/set_owner <OwnerName> <AreaName>` -- Protects an area for a specified
player. (requires the `areas` privilege)
* `/add_owner <ParentID> <OwnerName> <ChildName>` -- Grants another player
control over part (or all) of an area.
* `/rename_area <ID> <NewName>` -- Renames an existing area.
* `/list_areas` -- Lists all of the areas that you own, or all areas if you
have the `areas` privilege.
* `/find_areas <Regex>` -- Finds areas using a Lua regular expresion.
For example, to find castles:
/find_areas [Cc]astle
* `/remove_area <ID>` -- Removes an area that you own. Any sub-areas of that
area are made sub-areas of the removed area's parent, if it exists.
If the removed area has no parent it's sub-areas will have no parent.
* `/recursive_remove_areas <ID>` -- Removes an area and all sub-areas of it.
* `/change_owner <ID> <NewOwner>` -- Change the owner of an area.
* `/area_info` -- Returns information about area configuration and usage.
* `/select_area <ID>` -- Sets the area positions to those of an existing
area.
* `/area_pos {set,set1,set2,get}` -- Sets the area positions by punching
nodes or shows the current area positions.
* `/area_pos1 [X,Y,Z|X Y Z]` -- Sets area position one to your position or
the one supplied.
* `/area_pos2 [X,Y,Z|X Y Z]` -- Sets area position two to your position or
the one supplied.
License
-------
Copyright (C) 2013 ShadowNinja
Licensed under the GNU LGPL version 2.1 or later.
See LICENSE.txt and http://www.gnu.org/licenses/lgpl-2.1.txt

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--- Returns a list of areas that include the provided position.
function areas:getAreasAtPos(pos)
local res = {}
if self.store then
local a = self.store:get_areas_for_pos(pos, false, true)
for store_id, store_area in pairs(a) do
local id = tonumber(store_area.data)
res[id] = self.areas[id]
end
else
local px, py, pz = pos.x, pos.y, pos.z
for id, area in pairs(self.areas) do
local ap1, ap2 = area.pos1, area.pos2
if
(px >= ap1.x and px <= ap2.x) and
(py >= ap1.y and py <= ap2.y) and
(pz >= ap1.z and pz <= ap2.z) then
res[id] = area
end
end
end
return res
end
--- Returns areas that intersect with the passed area.
function areas:getAreasIntersectingArea(pos1, pos2)
local res = {}
if self.store then
local a = self.store:get_areas_in_area(pos1, pos2,
true, false, true)
for store_id, store_area in pairs(a) do
local id = tonumber(store_area.data)
res[id] = self.areas[id]
end
else
self:sortPos(pos1, pos2)
local p1x, p1y, p1z = pos1.x, pos1.y, pos1.z
local p2x, p2y, p2z = pos2.x, pos2.y, pos2.z
for id, area in pairs(self.areas) do
local ap1, ap2 = area.pos1, area.pos2
if
(ap1.x <= p2x and ap2.x >= p1x) and
(ap1.y <= p2y and ap2.y >= p1y) and
(ap1.z <= p2z and ap2.z >= p1z) then
-- Found an intersecting area.
res[id] = area
end
end
end
return res
end
-- Checks if the area is unprotected or owned by you
function areas:canInteract(pos, name)
if minetest.check_player_privs(name, self.adminPrivs) then
return true
end
local owned = false
for _, area in pairs(self:getAreasAtPos(pos)) do
if area.owner == name or area.open then
return true
else
owned = true
end
end
return not owned
end
-- Returns a table (list) of all players that own an area
function areas:getNodeOwners(pos)
local owners = {}
for _, area in pairs(self:getAreasAtPos(pos)) do
table.insert(owners, area.owner)
end
return owners
end
--- Checks if the area intersects with an area that the player can't interact in.
-- Note that this fails and returns false when the specified area is fully
-- owned by the player, but with multiple protection zones, none of which
-- cover the entire checked area.
-- @param name (optional) Player name. If not specified checks for any intersecting areas.
-- @param allow_open Whether open areas should be counted as if they didn't exist.
-- @return Boolean indicating whether the player can interact in that area.
-- @return Un-owned intersecting area ID, if found.
function areas:canInteractInArea(pos1, pos2, name, allow_open)
if name and minetest.check_player_privs(name, self.adminPrivs) then
return true
end
self:sortPos(pos1, pos2)
-- Intersecting non-owned area ID, if found.
local blocking_area = nil
local areas = self:getAreasIntersectingArea(pos1, pos2)
for id, area in pairs(areas) do
-- First check for a fully enclosing owned area.
-- A little optimization: isAreaOwner isn't necessary
-- here since we're iterating over all relevant areas.
if area.owner == name and
self:isSubarea(pos1, pos2, id) then
return true
end
-- Then check for intersecting non-owned (blocking) areas.
-- We don't bother with this check if we've already found a
-- blocking area, as the check is somewhat expensive.
-- The area blocks if the area is closed or open areas aren't
-- acceptable to the caller, and the area isn't owned.
-- Note: We can't return directly here, because there might be
-- an exclosing owned area that we haven't gotten to yet.
if not blocking_area and
(not allow_open or not area.open) and
(not name or not self:isAreaOwner(id, name)) then
blocking_area = id
end
end
if blocking_area then
return false, blocking_area
end
-- There are no intersecting areas or they are only partially
-- intersecting areas and they are all owned by the player.
return true
end

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minetest.register_chatcommand("protect", {
params = "<AreaName>",
description = "Protect your own area",
privs = {[areas.config.self_protection_privilege]=true},
func = function(name, param)
if param == "" then
return false, "Invalid usage, see /help protect."
end
local pos1, pos2 = areas:getPos(name)
if not (pos1 and pos2) then
return false, "You need to select an area first."
end
minetest.log("action", "/protect invoked, owner="..name..
" AreaName="..param..
" StartPos="..minetest.pos_to_string(pos1)..
" EndPos=" ..minetest.pos_to_string(pos2))
local canAdd, errMsg = areas:canPlayerAddArea(pos1, pos2, name)
if not canAdd then
return false, "You can't protect that area: "..errMsg
end
local id = areas:add(name, param, pos1, pos2, nil)
areas:save()
return true, "Area protected. ID: "..id
end
})
minetest.register_chatcommand("set_owner", {
params = "<PlayerName> <AreaName>",
description = "Protect an area beetween two positions and give"
.." a player access to it without setting the parent of the"
.." area to any existing area",
privs = areas.adminPrivs,
func = function(name, param)
local ownerName, areaName = param:match('^(%S+)%s(.+)$')
if not ownerName then
return false, "Incorrect usage, see /help set_owner."
end
local pos1, pos2 = areas:getPos(name)
if not (pos1 and pos2) then
return false, "You need to select an area first."
end
if not areas:player_exists(ownerName) then
return false, "The player \""
..ownerName.."\" does not exist."
end
minetest.log("action", name.." runs /set_owner. Owner = "..ownerName..
" AreaName = "..areaName..
" StartPos = "..minetest.pos_to_string(pos1)..
" EndPos = " ..minetest.pos_to_string(pos2))
local id = areas:add(ownerName, areaName, pos1, pos2, nil)
areas:save()
minetest.chat_send_player(ownerName,
"You have been granted control over area #"..
id..". Type /list_areas to show your areas.")
return true, "Area protected. ID: "..id
end
})
minetest.register_chatcommand("add_owner", {
params = "<ParentID> <Player> <AreaName>",
description = "Give a player access to a sub-area beetween two"
.." positions that have already been protected,"
.." Use set_owner if you don't want the parent to be set.",
func = function(name, param)
local pid, ownerName, areaName
= param:match('^(%d+) ([^ ]+) (.+)$')
if not pid then
minetest.chat_send_player(name, "Incorrect usage, see /help add_owner")
return
end
local pos1, pos2 = areas:getPos(name)
if not (pos1 and pos2) then
return false, "You need to select an area first."
end
if not areas:player_exists(ownerName) then
return false, "The player \""..ownerName.."\" does not exist."
end
minetest.log("action", name.." runs /add_owner. Owner = "..ownerName..
" AreaName = "..areaName.." ParentID = "..pid..
" StartPos = "..pos1.x..","..pos1.y..","..pos1.z..
" EndPos = " ..pos2.x..","..pos2.y..","..pos2.z)
-- Check if this new area is inside an area owned by the player
pid = tonumber(pid)
if (not areas:isAreaOwner(pid, name)) or
(not areas:isSubarea(pos1, pos2, pid)) then
return false, "You can't protect that area."
end
local id = areas:add(ownerName, areaName, pos1, pos2, pid)
areas:save()
minetest.chat_send_player(ownerName,
"You have been granted control over area #"..
id..". Type /list_areas to show your areas.")
return true, "Area protected. ID: "..id
end
})
minetest.register_chatcommand("rename_area", {
params = "<ID> <newName>",
description = "Rename a area that you own",
func = function(name, param)
local id, newName = param:match("^(%d+)%s(.+)$")
if not id then
return false, "Invalid usage, see /help rename_area."
end
id = tonumber(id)
if not id then
return false, "That area doesn't exist."
end
if not areas:isAreaOwner(id, name) then
return true, "You don't own that area."
end
areas.areas[id].name = newName
areas:save()
return true, "Area renamed."
end
})
minetest.register_chatcommand("find_areas", {
params = "<regexp>",
description = "Find areas using a Lua regular expression",
privs = areas.adminPrivs,
func = function(name, param)
if param == "" then
return false, "A regular expression is required."
end
-- Check expression for validity
local function testRegExp()
("Test [1]: Player (0,0,0) (0,0,0)"):find(param)
end
if not pcall(testRegExp) then
return false, "Invalid regular expression."
end
local matches = {}
for id, area in pairs(areas.areas) do
local str = areas:toString(id)
if str:find(param) then
table.insert(matches, str)
end
end
if #matches > 0 then
return true, table.concat(matches, "\n")
else
return true, "No matches found."
end
end
})
minetest.register_chatcommand("list_areas", {
description = "List your areas, or all areas if you are an admin.",
func = function(name, param)
local admin = minetest.check_player_privs(name, areas.adminPrivs)
local areaStrings = {}
for id, area in pairs(areas.areas) do
if admin or areas:isAreaOwner(id, name) then
table.insert(areaStrings, areas:toString(id))
end
end
if #areaStrings == 0 then
return true, "No visible areas."
end
return true, table.concat(areaStrings, "\n")
end
})
minetest.register_chatcommand("recursive_remove_areas", {
params = "<id>",
description = "Recursively remove areas using an id",
func = function(name, param)
local id = tonumber(param)
if not id then
return false, "Invalid usage, see"
.." /help recursive_remove_areas"
end
if not areas:isAreaOwner(id, name) then
return false, "Area "..id.." does not exist or is"
.." not owned by you."
end
areas:remove(id, true)
areas:save()
return true, "Removed area "..id.." and it's sub areas."
end
})
minetest.register_chatcommand("remove_area", {
params = "<id>",
description = "Remove an area using an id",
func = function(name, param)
local id = tonumber(param)
if not id then
return false, "Invalid usage, see /help remove_area"
end
if not areas:isAreaOwner(id, name) then
return false, "Area "..id.." does not exist or"
.." is not owned by you."
end
areas:remove(id)
areas:save()
return true, "Removed area "..id
end
})
minetest.register_chatcommand("change_owner", {
params = "<ID> <NewOwner>",
description = "Change the owner of an area using it's ID",
func = function(name, param)
local id, newOwner = param:match("^(%d+)%s(%S+)$")
if not id then
return false, "Invalid usage, see"
.." /help change_owner."
end
if not areas:player_exists(newOwner) then
return false, "The player \""..newOwner
.."\" does not exist."
end
id = tonumber(id)
if not areas:isAreaOwner(id, name) then
return false, "Area "..id.." does not exist"
.." or is not owned by you."
end
areas.areas[id].owner = newOwner
areas:save()
minetest.chat_send_player(newOwner,
("%s has given you control over the area %q (ID %d).")
:format(name, areas.areas[id].name, id))
return true, "Owner changed."
end
})
minetest.register_chatcommand("area_open", {
params = "<ID>",
description = "Toggle an area open (anyone can interact) or closed",
func = function(name, param)
local id = tonumber(param)
if not id then
return false, "Invalid usage, see /help area_open."
end
if not areas:isAreaOwner(id, name) then
return false, "Area "..id.." does not exist"
.." or is not owned by you."
end
local open = not areas.areas[id].open
-- Save false as nil to avoid inflating the DB.
areas.areas[id].open = open or nil
areas:save()
return true, ("Area %s."):format(open and "opened" or "closed")
end
})
minetest.register_chatcommand("move_area", {
params = "<ID>",
description = "Move (or resize) an area to the current positions.",
privs = areas.adminPrivs,
func = function(name, param)
local id = tonumber(param)
if not id then
return false, "Invalid usage, see /help move_area."
end
local area = areas.areas[id]
if not area then
return false, "Area does not exist."
end
local pos1, pos2 = areas:getPos(name)
if not pos1 then
return false, "You need to select an area first."
end
areas:move(id, area, pos1, pos2)
areas:save()
return true, "Area successfully moved."
end,
})
minetest.register_chatcommand("area_info", {
description = "Get information about area configuration and usage.",
func = function(name, param)
local lines = {}
local privs = minetest.get_player_privs(name)
-- Short (and fast to access) names
local cfg = areas.config
local self_prot = cfg.self_protection
local prot_priv = cfg.self_protection_privilege
local limit = cfg.self_protection_max_areas
local limit_high = cfg.self_protection_max_areas_high
local size_limit = cfg.self_protection_max_size
local size_limit_high = cfg.self_protection_max_size_high
local has_high_limit = privs.areas_high_limit
local has_prot_priv = not prot_priv or privs[prot_priv]
local can_prot = privs.areas or (self_prot and has_prot_priv)
local max_count = can_prot and
(has_high_limit and limit_high or limit) or 0
local max_size = has_high_limit and
size_limit_high or size_limit
-- Privilege information
local self_prot_line = ("Self protection is %sabled"):format(
self_prot and "en" or "dis")
if self_prot and prot_priv then
self_prot_line = self_prot_line..
(" %s have the neccessary privilege (%q).")
:format(
has_prot_priv and "and you" or
"but you don't",
prot_priv)
else
self_prot_line = self_prot_line.."."
end
table.insert(lines, self_prot_line)
if privs.areas then
table.insert(lines, "You are an area"..
" administrator (\"areas\" privilege).")
elseif has_high_limit then
table.insert(lines,
"You have extended area protection"..
" limits (\"areas_high_limit\" privilege).")
end
-- Area count
local area_num = 0
for id, area in pairs(areas.areas) do
if area.owner == name then
area_num = area_num + 1
end
end
local count_line = ("You have %d area%s"):format(
area_num, area_num == 1 and "" or "s")
if privs.areas then
count_line = count_line..
" and have no area protection limits."
elseif can_prot then
count_line = count_line..(", out of a maximum of %d.")
:format(max_count)
end
table.insert(lines, count_line)
-- Area size limits
local function size_info(str, size)
table.insert(lines, ("%s spanning up to %dx%dx%d.")
:format(str, size.x, size.y, size.z))
end
local function priv_limit_info(priv, max_count, max_size)
size_info(("Players with the %q privilege"..
" can protect up to %d areas"):format(
priv, max_count), max_size)
end
if self_prot then
if privs.areas then
priv_limit_info(prot_priv,
limit, size_limit)
priv_limit_info("areas_high_limit",
limit_high, size_limit_high)
elseif has_prot_priv then
size_info("You can protect areas", max_size)
end
end
return true, table.concat(lines, "\n")
end,
})

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-- This is inspired by the landrush mod by Bremaweb
areas.hud = {}
minetest.register_globalstep(function(dtime)
for _, player in pairs(minetest.get_connected_players()) do
local name = player:get_player_name()
local pos = vector.round(player:getpos())
local areaStrings = {}
for id, area in pairs(areas:getAreasAtPos(pos)) do
table.insert(areaStrings, ("%s [%u] (%s%s)")
:format(area.name, id, area.owner,
area.open and ":open" or ""))
end
local areaString = "Areas:"
if #areaStrings > 0 then
areaString = areaString.."\n"..
table.concat(areaStrings, "\n")
end
local hud = areas.hud[name]
if not hud then
hud = {}
areas.hud[name] = hud
hud.areasId = player:hud_add({
hud_elem_type = "text",
name = "Areas",
number = 0xFFFFFF,
position = {x=0, y=1},
offset = {x=8, y=-8},
text = areaString,
scale = {x=200, y=60},
alignment = {x=1, y=-1},
})
hud.oldAreas = areaString
return
elseif hud.oldAreas ~= areaString then
player:hud_change(hud.areasId, "text", areaString)
hud.oldAreas = areaString
end
end
end)
minetest.register_on_leaveplayer(function(player)
areas.hud[player:get_player_name()] = nil
end)

39
mods/world/areas/init.lua Normal file
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-- Areas mod by ShadowNinja
-- Based on node_ownership
-- License: LGPLv2+
areas = {}
areas.adminPrivs = {areas=true}
areas.startTime = os.clock()
areas.modpath = minetest.get_modpath("areas")
dofile(areas.modpath.."/settings.lua")
dofile(areas.modpath.."/api.lua")
dofile(areas.modpath.."/internal.lua")
dofile(areas.modpath.."/chatcommands.lua")
dofile(areas.modpath.."/pos.lua")
dofile(areas.modpath.."/interact.lua")
dofile(areas.modpath.."/legacy.lua")
dofile(areas.modpath.."/hud.lua")
areas:load()
minetest.register_privilege("areas", {
description = "Can administer areas."
})
minetest.register_privilege("areas_high_limit", {
description = "Can can more, bigger areas."
})
if not minetest.registered_privileges[areas.config.self_protection_privilege] then
minetest.register_privilege(areas.config.self_protection_privilege, {
description = "Can protect areas.",
})
end
if minetest.setting_getbool("log_mod") then
local diffTime = os.clock() - areas.startTime
minetest.log("action", "areas loaded in "..diffTime.."s.")
end

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local old_is_protected = minetest.is_protected
function minetest.is_protected(pos, name)
if not areas:canInteract(pos, name) then
return true
end
return old_is_protected(pos, name)
end
minetest.register_on_protection_violation(function(pos, name)
if not areas:canInteract(pos, name) then
local owners = areas:getNodeOwners(pos)
minetest.chat_send_player(name,
("%s is protected by %s."):format(
minetest.pos_to_string(pos),
table.concat(owners, ", ")))
end
end)

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function areas:player_exists(name)
return minetest.auth_table[name] ~= nil
end
-- Save the areas table to a file
function areas:save()
local datastr = minetest.serialize(self.areas)
if not datastr then
minetest.log("error", "[areas] Failed to serialize area data!")
return
end
local file, err = io.open(self.config.filename, "w")
if err then
return err
end
file:write(datastr)
file:close()
end
-- Load the areas table from the save file
function areas:load()
local file, err = io.open(self.config.filename, "r")
if err then
self.areas = self.areas or {}
return err
end
self.areas = minetest.deserialize(file:read("*a"))
if type(self.areas) ~= "table" then
self.areas = {}
end
file:close()
self:populateStore()
end
--- Checks an AreaStore ID.
-- Deletes the AreaStore (falling back to the iterative method)
-- and prints an error message if the ID is invalid.
-- @return Whether the ID was valid.
function areas:checkAreaStoreId(sid)
if not sid then
minetest.log("error", "AreaStore failed to find an ID for an "
.."area! Falling back to iterative area checking.")
self.store = nil
self.store_ids = nil
end
return sid and true or false
end
-- Populates the AreaStore after loading, if needed.
function areas:populateStore()
if not rawget(_G, "AreaStore") then
return
end
local store = AreaStore()
local store_ids = {}
for id, area in pairs(areas.areas) do
local sid = store:insert_area(area.pos1,
area.pos2, tostring(id))
if not self:checkAreaStoreId(sid) then
return
end
store_ids[id] = sid
end
self.store = store
self.store_ids = store_ids
end
-- Finds the first usable index in a table
-- Eg: {[1]=false,[4]=true} -> 2
local function findFirstUnusedIndex(t)
local i = 0
repeat i = i + 1
until t[i] == nil
return i
end
--- Add a area.
-- @return The new area's ID.
function areas:add(owner, name, pos1, pos2, parent)
local id = findFirstUnusedIndex(self.areas)
self.areas[id] = {
name = name,
pos1 = pos1,
pos2 = pos2,
owner = owner,
parent = parent
}
-- Add to AreaStore
if self.store then
local sid = self.store:insert_area(pos1, pos2, tostring(id))
if self:checkAreaStoreId(sid) then
self.store_ids[id] = sid
end
end
return id
end
--- Remove a area, and optionally it's children recursively.
-- If a area is deleted non-recursively the children will
-- have the removed area's parent as their new parent.
function areas:remove(id, recurse)
if recurse then
-- Recursively find child entries and remove them
local cids = self:getChildren(id)
for _, cid in pairs(cids) do
self:remove(cid, true)
end
else
-- Update parents
local parent = self.areas[id].parent
local children = self:getChildren(id)
for _, cid in pairs(children) do
-- The subarea parent will be niled out if the
-- removed area does not have a parent
self.areas[cid].parent = parent
end
end
-- Remove main entry
self.areas[id] = nil
-- Remove from AreaStore
if self.store then
self.store:remove_area(self.store_ids[id])
self.store_ids[id] = nil
end
end
--- Move an area.
function areas:move(id, area, pos1, pos2)
area.pos1 = pos1
area.pos2 = pos2
if self.store then
self.store:remove_area(areas.store_ids[id])
local sid = self.store:insert_area(pos1, pos2, tostring(id))
if self:checkAreaStoreId(sid) then
self.store_ids[id] = sid
end
end
end
-- Checks if a area between two points is entirely contained by another area.
-- Positions must be sorted.
function areas:isSubarea(pos1, pos2, id)
local area = self.areas[id]
if not area then
return false
end
local ap1, ap2 = area.pos1, area.pos2
local ap1x, ap1y, ap1z = ap1.x, ap1.y, ap1.z
local ap2x, ap2y, ap2z = ap2.x, ap2.y, ap2.z
local p1x, p1y, p1z = pos1.x, pos1.y, pos1.z
local p2x, p2y, p2z = pos2.x, pos2.y, pos2.z
if
(p1x >= ap1x and p1x <= ap2x) and
(p2x >= ap1x and p2x <= ap2x) and
(p1y >= ap1y and p1y <= ap2y) and
(p2y >= ap1y and p2y <= ap2y) and
(p1z >= ap1z and p1z <= ap2z) and
(p2z >= ap1z and p2z <= ap2z) then
return true
end
end
-- Returns a table (list) of children of an area given it's identifier
function areas:getChildren(id)
local children = {}
for cid, area in pairs(self.areas) do
if area.parent and area.parent == id then
table.insert(children, cid)
end
end
return children
end
-- Checks if the user has sufficient privileges.
-- If the player is not a administrator it also checks
-- if the area intersects other areas that they do not own.
-- Also checks the size of the area and if the user already
-- has more than max_areas.
function areas:canPlayerAddArea(pos1, pos2, name)
local privs = minetest.get_player_privs(name)
if privs.areas then
return true
end
-- Check self protection privilege, if it is enabled,
-- and if the area is too big.
if not self.config.self_protection or
not privs[areas.config.self_protection_privilege] then
return false, "Self protection is disabled or you do not have"
.." the necessary privilege."
end
local max_size = privs.areas_high_limit and
self.config.self_protection_max_size_high or
self.config.self_protection_max_size
if
(pos2.x - pos1.x) > max_size.x or
(pos2.y - pos1.y) > max_size.y or
(pos2.z - pos1.z) > max_size.z then
return false, "Area is too big."
end
-- Check number of areas the user has and make sure it not above the max
local count = 0
for _, area in pairs(self.areas) do
if area.owner == name then
count = count + 1
end
end
local max_areas = privs.areas_high_limit and
self.config.self_protection_max_areas_high or
self.config.self_protection_max_areas
if count >= max_areas then
return false, "You have reached the maximum amount of"
.." areas that you are allowed to protect."
end
-- Check intersecting areas
local can, id = self:canInteractInArea(pos1, pos2, name)
if not can then
local area = self.areas[id]
return false, ("The area intersects with %s [%u] (%s).")
:format(area.name, id, area.owner)
end
return true
end
-- Given a id returns a string in the format:
-- "name [id]: owner (x1, y1, z1) (x2, y2, z2) -> children"
function areas:toString(id)
local area = self.areas[id]
local message = ("%s [%d]: %s %s %s"):format(
area.name, id, area.owner,
minetest.pos_to_string(area.pos1),
minetest.pos_to_string(area.pos2))
local children = areas:getChildren(id)
if #children > 0 then
message = message.." -> "..table.concat(children, ", ")
end
return message
end
-- Re-order areas in table by their identifiers
function areas:sort()
local sa = {}
for k, area in pairs(self.areas) do
if not area.parent then
table.insert(sa, area)
local newid = #sa
for _, subarea in pairs(self.areas) do
if subarea.parent == k then
subarea.parent = newid
table.insert(sa, subarea)
end
end
end
end
self.areas = sa
end
-- Checks if a player owns an area or a parent of it
function areas:isAreaOwner(id, name)
local cur = self.areas[id]
if cur and minetest.check_player_privs(name, self.adminPrivs) then
return true
end
while cur do
if cur.owner == name then
return true
elseif cur.parent then
cur = self.areas[cur.parent]
else
return false
end
end
return false
end

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-- This file contains functions to convert from
-- the old areas format and other compatability code.
minetest.register_chatcommand("legacy_load_areas", {
params = "<version>",
description = "Loads, converts, and saves the areas from"
.." a legacy save file.",
privs = {areas=true, server=true},
func = function(name, param)
minetest.chat_send_player(name, "Converting areas...")
local version = tonumber(param)
if version == 0 then
err = areas:node_ownership_load()
if err then
minetest.chat_send_player(name, "Error loading legacy file: "..err)
return
end
else
minetest.chat_send_player(name, "Invalid version number. (0 allowed)")
return
end
minetest.chat_send_player(name, "Legacy file loaded.")
for k, area in pairs(areas.areas) do
-- New position format
area.pos1 = {x=area.x1, y=area.y1, z=area.z1}
area.pos2 = {x=area.x2, y=area.y2, z=area.z2}
area.x1, area.y1, area.z1,
area.x2, area.y2, area.z2 =
nil, nil, nil, nil, nil, nil
-- Area positions sorting
areas:sortPos(area.pos1, area.pos2)
-- Add name
area.name = "unnamed"
-- Remove ID
area.id = nil
end
minetest.chat_send_player(name, "Table format updated.")
areas:save()
minetest.chat_send_player(name, "Converted areas saved. Done.")
end
})
function areas:node_ownership_load()
local filename = minetest.get_worldpath().."/owners.tbl"
tables, err = loadfile(filename)
if err then
return err
end
tables = tables()
for idx = 1, #tables do
local tolinkv, tolinki = {}, {}
for i, v in pairs(tables[idx]) do
if type(v) == "table" and tables[v[1]] then
table.insert(tolinkv, {i, tables[v[1]]})
end
if type(i) == "table" and tables[i[1]] then
table.insert(tolinki, {i, tables[i[1]]})
end
end
-- link values, first due to possible changes of indices
for _, v in ipairs(tolinkv) do
tables[idx][v[1]] = v[2]
end
-- link indices
for _, v in ipairs(tolinki) do
tables[idx][v[2]], tables[idx][v[1]] = tables[idx][v[1]], nil
end
end
self.areas = tables[1]
end
-- Returns the name of the first player that owns an area
function areas.getNodeOwnerName(pos)
for id, area in pairs(areas:getAreasAtPos(pos)) do
return area.owner
end
return false
end
-- Checks if a node is owned by you
function areas.isNodeOwner(pos, name)
if minetest.check_player_privs(name, areas.adminPrivs) then
return true
end
for id, area in pairs(areas:getAreasAtPos(pos)) do
if name == area.owner then
return true
end
end
return false
end
-- Checks if an area has an owner
function areas.hasOwner(pos)
for id, area in pairs(areas:getAreasAtPos(pos)) do
return true
end
return false
end
IsPlayerNodeOwner = areas.isNodeOwner
GetNodeOwnerName = areas.getNodeOwnerName
HasOwner = areas.hasOwner
-- This is entirely untested and may break in strange and new ways.
if areas.config.legacy_table then
owner_defs = setmetatable({}, {
__index = function(table, key)
local a = rawget(areas.areas, key)
if not a then return a end
local b = {}
for k, v in pairs(a) do b[k] = v end
b.x1, b.y1, b.z1 = b.pos1.x, b.pos1.y, b.pos1.z
b.x2, b.y1, b.z2 = b.pos2.x, b.pos2.y, b.pos2.z
b.pos1, b.pos2 = nil, nil
b.id = key
return b
end,
__newindex = function(table, key, value)
local a = value
a.pos1, a.pos2 = {x=a.x1, y=a.y1, z=a.z1},
{x=a.x2, y=a.y2, z=a.z2}
a.x1, a.y1, a.z1, a.x2, a.y2, a.z2 =
nil, nil, nil, nil, nil, nil
a.name = a.name or "unnamed"
a.id = nil
return rawset(areas.areas, key, a)
end
})
end

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-- I could depend on WorldEdit for this, but you need to have the 'worldedit'
-- permission to use those commands and you don't have
-- /area_pos{1,2} [X Y Z|X,Y,Z].
-- Since this is mostly copied from WorldEdit it is mostly
-- licensed under the AGPL. (select_area is a exception)
areas.marker1 = {}
areas.marker2 = {}
areas.set_pos = {}
areas.pos1 = {}
areas.pos2 = {}
minetest.register_chatcommand("select_area", {
params = "<ID>",
description = "Select a area by id.",
func = function(name, param)
local id = tonumber(param)
if not id then
return false, "Invalid usage, see /help select_area."
end
if not areas.areas[id] then
return false, "The area "..id.." does not exist."
end
areas:setPos1(name, areas.areas[id].pos1)
areas:setPos2(name, areas.areas[id].pos2)
return true, "Area "..id.." selected."
end,
})
minetest.register_chatcommand("area_pos1", {
params = "[X Y Z|X,Y,Z]",
description = "Set area protection region position 1 to your"
.." location or the one specified",
privs = {},
func = function(name, param)
local pos = nil
local found, _, x, y, z = param:find(
"^(-?%d+)[, ](-?%d+)[, ](-?%d+)$")
if found then
pos = {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
elseif param == "" then
local player = minetest.get_player_by_name(name)
if player then
pos = player:getpos()
else
return false, "Unable to get position."
end
else
return false, "Invalid usage, see /help area_pos1."
end
pos = vector.round(pos)
areas:setPos1(name, pos)
return true, "Area position 1 set to "
..minetest.pos_to_string(pos)
end,
})
minetest.register_chatcommand("area_pos2", {
params = "[X Y Z|X,Y,Z]",
description = "Set area protection region position 2 to your"
.." location or the one specified",
func = function(name, param)
local pos = nil
local found, _, x, y, z = param:find(
"^(-?%d+)[, ](-?%d+)[, ](-?%d+)$")
if found then
pos = {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
elseif param == "" then
local player = minetest.get_player_by_name(name)
if player then
pos = player:getpos()
else
return false, "Unable to get position."
end
else
return false, "Invalid usage, see /help area_pos2."
end
pos = vector.round(pos)
areas:setPos2(name, pos)
return true, "Area position 2 set to "
..minetest.pos_to_string(pos)
end,
})
minetest.register_chatcommand("area_pos", {
params = "set/set1/set2/get",
description = "Set area protection region, position 1, or position 2"
.." by punching nodes, or display the region",
func = function(name, param)
if param == "set" then -- Set both area positions
areas.set_pos[name] = "pos1"
return true, "Select positions by punching two nodes."
elseif param == "set1" then -- Set area position 1
areas.set_pos[name] = "pos1only"
return true, "Select position 1 by punching a node."
elseif param == "set2" then -- Set area position 2
areas.set_pos[name] = "pos2"
return true, "Select position 2 by punching a node."
elseif param == "get" then -- Display current area positions
local pos1str, pos2str = "Position 1: ", "Position 2: "
if areas.pos1[name] then
pos1str = pos1str..minetest.pos_to_string(areas.pos1[name])
else
pos1str = pos1str.."<not set>"
end
if areas.pos2[name] then
pos2str = pos2str..minetest.pos_to_string(areas.pos2[name])
else
pos2str = pos2str.."<not set>"
end
return true, pos1str.."\n"..pos2str
else
return false, "Unknown subcommand: "..param
end
end,
})
function areas:getPos(playerName)
local pos1, pos2 = areas.pos1[playerName], areas.pos2[playerName]
if not (pos1 and pos2) then
return nil
end
-- Copy positions so that the area table doesn't contain multiple
-- references to the same position.
pos1, pos2 = vector.new(pos1), vector.new(pos2)
return areas:sortPos(pos1, pos2)
end
function areas:setPos1(playerName, pos)
areas.pos1[playerName] = pos
areas.markPos1(playerName)
end
function areas:setPos2(playerName, pos)
areas.pos2[playerName] = pos
areas.markPos2(playerName)
end
minetest.register_on_punchnode(function(pos, node, puncher)
local name = puncher:get_player_name()
-- Currently setting position
if name ~= "" and areas.set_pos[name] then
if areas.set_pos[name] == "pos1" then
areas.pos1[name] = pos
areas.markPos1(name)
areas.set_pos[name] = "pos2"
minetest.chat_send_player(name,
"Position 1 set to "
..minetest.pos_to_string(pos))
elseif areas.set_pos[name] == "pos1only" then
areas.pos1[name] = pos
areas.markPos1(name)
areas.set_pos[name] = nil
minetest.chat_send_player(name,
"Position 1 set to "
..minetest.pos_to_string(pos))
elseif areas.set_pos[name] == "pos2" then
areas.pos2[name] = pos
areas.markPos2(name)
areas.set_pos[name] = nil
minetest.chat_send_player(name,
"Position 2 set to "
..minetest.pos_to_string(pos))
end
end
end)
-- Modifies positions `pos1` and `pos2` so that each component of `pos1`
-- is less than or equal to its corresponding component of `pos2`,
-- returning the two positions.
function areas:sortPos(pos1, pos2)
if pos1.x > pos2.x then
pos2.x, pos1.x = pos1.x, pos2.x
end
if pos1.y > pos2.y then
pos2.y, pos1.y = pos1.y, pos2.y
end
if pos1.z > pos2.z then
pos2.z, pos1.z = pos1.z, pos2.z
end
return pos1, pos2
end
-- Marks area position 1
areas.markPos1 = function(name)
local pos = areas.pos1[name]
if areas.marker1[name] ~= nil then -- Marker already exists
areas.marker1[name]:remove() -- Remove marker
areas.marker1[name] = nil
end
if pos ~= nil then -- Add marker
areas.marker1[name] = minetest.add_entity(pos, "areas:pos1")
areas.marker1[name]:get_luaentity().active = true
end
end
-- Marks area position 2
areas.markPos2 = function(name)
local pos = areas.pos2[name]
if areas.marker2[name] ~= nil then -- Marker already exists
areas.marker2[name]:remove() -- Remove marker
areas.marker2[name] = nil
end
if pos ~= nil then -- Add marker
areas.marker2[name] = minetest.add_entity(pos, "areas:pos2")
areas.marker2[name]:get_luaentity().active = true
end
end
minetest.register_entity("areas:pos1", {
initial_properties = {
visual = "cube",
visual_size = {x=1.1, y=1.1},
textures = {"areas_pos1.png", "areas_pos1.png",
"areas_pos1.png", "areas_pos1.png",
"areas_pos1.png", "areas_pos1.png"},
collisionbox = {-0.55, -0.55, -0.55, 0.55, 0.55, 0.55},
},
on_step = function(self, dtime)
if self.active == nil then
self.object:remove()
end
end,
on_punch = function(self, hitter)
self.object:remove()
local name = hitter:get_player_name()
areas.marker1[name] = nil
end,
})
minetest.register_entity("areas:pos2", {
initial_properties = {
visual = "cube",
visual_size = {x=1.1, y=1.1},
textures = {"areas_pos2.png", "areas_pos2.png",
"areas_pos2.png", "areas_pos2.png",
"areas_pos2.png", "areas_pos2.png"},
collisionbox = {-0.55, -0.55, -0.55, 0.55, 0.55, 0.55},
},
on_step = function(self, dtime)
if self.active == nil then
self.object:remove()
end
end,
on_punch = function(self, hitter)
self.object:remove()
local name = hitter:get_player_name()
areas.marker2[name] = nil
end,
})

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local world_path = minetest.get_worldpath()
areas.config = {}
local function setting(tp, name, default)
local full_name = "areas."..name
local value
if tp == "boolean" then
value = minetest.setting_getbool(full_name)
elseif tp == "string" then
value = minetest.setting_get(full_name)
elseif tp == "position" then
value = minetest.setting_get_pos(full_name)
elseif tp == "number" then
value = tonumber(minetest.setting_get(full_name))
else
error("Invalid setting type!")
end
if value == nil then
value = default
end
areas.config[name] = value
end
--------------
-- Settings --
--------------
setting("string", "filename", world_path.."/areas.dat")
-- Allow players with a privilege create their own areas
-- within the maximum size and number.
setting("boolean", "self_protection", false)
setting("string", "self_protection_privilege", "interact")
setting("position", "self_protection_max_size", {x=64, y=128, z=64})
setting("number", "self_protection_max_areas", 4)
-- For players with the areas_high_limit privilege.
setting("position", "self_protection_max_size_high", {x=512, y=512, z=512})
setting("number", "self_protection_max_areas_high", 32)
-- legacy_table (owner_defs) compatibility. Untested and has known issues.
setting("boolean", "legacy_table", false)

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