MoreMesecons/moremesecons_commandblock/init.lua

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local accepted_commands = {"tell"} -- Authorized commands. Any to accept all.
local NEAREST_MAX_DISTANCE = 8
local function initialize_data(meta)
local commands = meta:get_string("commands")
meta:set_string("formspec",
"invsize[9,5;]" ..
"textarea[0.5,0.5;8.5,4;commands;Commands;"..commands.."]" ..
"label[1,3.8;@nearest is replaced by the nearest player name ("..tostring(NEAREST_MAX_DISTANCE).." nodes max for the nearest distance)".."]" ..
"button_exit[3.3,4.5;2,1;submit;Submit]")
local owner = meta:get_string("owner")
if owner == "" then
owner = "not owned"
else
owner = "owned by " .. owner
end
meta:set_string("infotext", "Command Block\n" ..
"(" .. owner .. ")\n" ..
"Commands: "..commands)
end
local function construct(pos)
local meta = minetest.get_meta(pos)
meta:set_string("commands", "tell @nearest Commandblock unconfigured")
meta:set_string("owner", "")
initialize_data(meta)
end
local function after_place(pos, placer)
if placer then
local meta = minetest.get_meta(pos)
meta:set_string("owner", placer:get_player_name())
initialize_data(meta)
end
end
local function receive_fields(pos, formname, fields, sender)
if not fields.submit then
return
end
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
if owner ~= "" and sender:get_player_name() ~= owner then
return
end
meta:set_string("commands", fields.commands)
initialize_data(meta)
end
local function resolve_commands(commands, pos)
local nearest = nil
local min_distance = math.huge
local players = minetest.get_connected_players()
for index, player in pairs(players) do
local distance = vector.distance(pos, player:getpos())
if distance < min_distance then
min_distance = distance
nearest = player:get_player_name()
end
end
new_commands = commands:gsub("@nearest", nearest)
return new_commands, min_distance, new_commands ~= commands
end
local function commandblock_action_on(pos, node)
if node.name ~= "moremesecons_commandblock:commandblock_off" then
return
end
minetest.swap_node(pos, {name = "moremesecons_commandblock:commandblock_on"})
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
if owner == "" then
return
end
local commands, distance, nearest_in_commands = resolve_commands(meta:get_string("commands"), pos)
if distance > NEAREST_MAX_DISTANCE and nearest_in_commands then
minetest.chat_send_player(owner, "The nearest player is too far to use his name in the commands of a craftable command block.")
return
end
for _, command in pairs(commands:split("\n")) do
local pos = command:find(" ")
local cmd, param = command, ""
if pos then
cmd = command:sub(1, pos - 1)
param = command:sub(pos + 1)
end
local cmddef = minetest.chatcommands[cmd]
local is_an_authorized_command = false
for i = 1, #accepted_commands do
if cmd == accepted_commands[i] then
is_an_authorized_command = true
break
end
end
if not is_an_authorized_command and #accepted_commands ~= 0 then
minetest.chat_send_player(owner, "You can not execute the command "..cmd.." with a craftable command block ! This event will be reported.")
minetest.log("action", "Player "..owner.." tryed to execute an unauthorized command with a craftable command block.")
return
end
if not cmddef then
minetest.chat_send_player(owner, "The command "..cmd.." does not exist")
return
end
local has_privs, missing_privs = minetest.check_player_privs(owner, cmddef.privs)
if not has_privs then
minetest.chat_send_player(owner, "You don't have permission "
.."to run "..cmd
.." (missing privileges: "
..table.concat(missing_privs, ", ")..")")
return
end
cmddef.func(owner, param)
end
end
local function commandblock_action_off(pos, node)
if node.name == "moremesecons_commandblock:commandblock_on" then
minetest.swap_node(pos, {name = "moremesecons_commandblock:commandblock_off"})
end
end
local function can_dig(pos, player)
local meta = minetest.get_meta(pos)
local owner = meta:get_string("owner")
return owner == "" or owner == player:get_player_name()
end
minetest.register_node("moremesecons_commandblock:commandblock_off", {
description = "Craftable Command Block",
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tiles = {"moremesecons_commandblock_off.png"},
groups = {cracky=2, mesecon_effector_off=1},
on_construct = construct,
after_place_node = after_place,
on_receive_fields = receive_fields,
can_dig = can_dig,
sounds = default.node_sound_stone_defaults(),
mesecons = {effector = {
action_on = commandblock_action_on
}}
})
minetest.register_node("moremesecons_commandblock:commandblock_on", {
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tiles = {"moremesecons_commandblock_on.png"},
groups = {cracky=2, mesecon_effector_on=1, not_in_creative_inventory=1},
light_source = 10,
drop = "moremesecons_commandblock:commandblock_off",
on_construct = construct,
after_place_node = after_place,
on_receive_fields = receive_fields,
can_dig = can_dig,
sounds = default.node_sound_stone_defaults(),
mesecons = {effector = {
action_off = commandblock_action_off
}}
})
minetest.register_craft({
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output = "moremesecons_commandblock:commandblock_off",
recipe = {
{"group:mesecon_conductor_craftable","default:mese_crystal","group:mesecon_conductor_craftable"},
{"default:mese_crystal","group:mesecon_conductor_craftable","default:mese_crystal"},
{"group:mesecon_conductor_craftable","default:mese_crystal","group:mesecon_conductor_craftable"}
}
})