forked from minetest-mods/MoreMesecons
118 lines
3.6 KiB
Lua
118 lines
3.6 KiB
Lua
local function make_formspec(meta, pos)
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local code = meta:get_string("code")
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local errmsg = minetest.formspec_escape(meta:get_string("errmsg"))
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meta:set_string("formspec",
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"size[10,8;]" ..
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"textarea[0.5,0.5;10,7;code;Code;"..code.."]" ..
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"label[0.1,7;"..errmsg.."]" ..
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"button_exit[4,7.5;2,1;submit;Submit]")
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end
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minetest.register_node("moremesecons_luablock:luablock", {
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description = "Lua Block",
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tiles = {"moremesecons_luablock.png"},
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groups = {cracky = 2},
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on_place = function(itemstack, placer, pointed_thing)
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local under = pointed_thing.under
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local node = minetest.get_node(under)
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local udef = minetest.registered_nodes[node.name]
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if udef and udef.on_rightclick and
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not (placer and placer:get_player_control().sneak) then
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return udef.on_rightclick(under, node, placer, itemstack,
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pointed_thing) or itemstack
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end
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local pos
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if minetest.registered_items[minetest.get_node(under).name].buildable_to then
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pos = under
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else
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pos = pointed_thing.above
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end
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local name = placer:get_player_name()
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if minetest.is_protected(pos, name) and
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not minetest.check_player_privs(name, {protection_bypass = true}) then
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minetest.record_protection_violation(pos, name)
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return itemstack
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end
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if not minetest.check_player_privs(name, {server = true}) then
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minetest.chat_send_player(name, "You can't use a LuaBlock without the server privilege.")
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return itemstack
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end
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local node_def = minetest.registered_nodes[minetest.get_node(pos).name]
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if not node_def or not node_def.buildable_to then
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return itemstack
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end
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minetest.set_node(pos, {name = "moremesecons_luablock:luablock"})
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local meta = minetest.get_meta(pos)
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meta:set_string("owner", name)
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meta:set_string("infotext", "LuaBlock owned by " .. name)
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make_formspec(meta, pos)
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if not (creative and creative.is_enabled_for
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and creative.is_enabled_for(placer:get_player_name())) then
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itemstack:take_item()
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end
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return itemstack
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end,
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on_receive_fields = function(pos, form_name, fields, sender)
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if not fields.submit then
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return
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end
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local name = sender:get_player_name()
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local meta = minetest.get_meta(pos)
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if name ~= meta:get_string("owner") then
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minetest.chat_send_player(name, "You don't own this LuaBlock.")
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return
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end
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if not minetest.check_player_privs(name, {server = true}) then
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minetest.chat_send_player(name, "You can't use a LuaBlock without the server privilege.")
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return
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end
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meta:set_string("code", fields.code)
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make_formspec(meta, pos)
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end,
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can_dig = function(pos, player)
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local meta = minetest.get_meta(pos)
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return meta:get_string("owner") == player:get_player_name()
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end,
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mesecons = {effector = {
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action_on = function(npos, node)
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local meta = minetest.get_meta(npos)
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local code = meta:get_string("code")
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if code == "" then
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return
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end
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-- We do absolutely no check there.
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-- There is no limitation in the number of instruction the LuaBlock can execute
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-- or the usage it can make of loops.
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-- It is executed in the global namespace.
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-- Remember: *The LuaBlock is highly dangerous and should be manipulated cautiously!*
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local func, err = loadstring(code)
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if not func then
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meta:set_string("errmsg", err)
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make_formspec(meta, pos)
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return
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end
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-- Set the "pos" global
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local old_pos = pos -- In case there's already an existing "pos" global
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pos = table.copy(npos)
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local good, err = pcall(func)
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pos = old_pos
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if not good then -- Runtime error
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meta:set_string("errmsg", err)
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make_formspec(meta, pos)
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return
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end
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meta:set_string("errmsg", "")
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make_formspec(meta, pos)
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end
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}}
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})
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