technic/wrench/init.lua

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--[[
Wrench mod
Adds a wrench that allows the player to pickup nodes that contain an inventory
with items or metadata that needs perserving.
The wrench has the same tool capability as the normal hand.
To pickup a node simply right click on it. If the node contains a formspec,
you will need to shift+right click instead.
Because it enables arbitrary nesting of chests, and so allows the player
to carry an unlimited amount of material at once, this wrench is not
available to survival-mode players.
--]]
local LATEST_SERIALIZATION_VERSION = 1
wrench = {}
local modpath = minetest.get_modpath(minetest.get_current_modname())
dofile(modpath.."/support.lua")
dofile(modpath.."/technic.lua")
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-- Boilerplate to support localized strings if intllib mod is installed.
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local S = rawget(_G, "intllib") and intllib.Getter() or function(s) return s end
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local function get_meta_type(name, metaname)
local def = wrench.registered_nodes[name]
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return def and def.metas and def.metas[metaname] or nil
end
local function get_pickup_name(name)
return "wrench:picked_up_"..(name:gsub(":", "_"))
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end
local function restore(pos, placer, itemstack)
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local data = itemstack:get_meta():get_string("data")
data = (data ~= "" and data) or itemstack:get_metadata()
data = minetest.deserialize(data)
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if not data then
minetest.remove_node(pos)
minetest.log("error", placer:get_player_name().." wanted to place "..
itemstack:get_name().." at "..minetest.pos_to_string(pos)..
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", but it had no data.")
minetest.log("verbose", "itemstack: "..itemstack:to_string())
return true
end
local node = minetest.get_node(pos)
minetest.set_node(pos, {name = data.name, param2 = node.param2})
-- Apply stored metadata to the current node
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
for key, value in pairs(data.metas) do
local meta_type = get_meta_type(data.name, key)
if meta_type == wrench.META_TYPE_INT then
meta:set_int(key, value)
elseif meta_type == wrench.META_TYPE_FLOAT then
meta:set_float(key, value)
elseif meta_type == wrench.META_TYPE_STRING then
meta:set_string(key, value)
end
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end
for listname, list in pairs(data.lists) do
inv:set_list(listname, list)
end
itemstack:take_item()
return itemstack
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end
minetest.register_on_mods_loaded(function()
-- Delayed registration for foreign mod support
for name, info in pairs(wrench.registered_nodes) do
local olddef = minetest.registered_nodes[name]
if olddef then
local newdef = {}
for key, value in pairs(olddef) do
newdef[key] = value
end
newdef.stack_max = 1
newdef.description = S("%s with items"):format(newdef.description)
newdef.groups = {}
newdef.groups.not_in_creative_inventory = 1
newdef.on_construct = nil
newdef.on_destruct = nil
newdef.after_place_node = restore
minetest.register_node(":"..get_pickup_name(name), newdef)
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end
end
end)
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minetest.register_tool("wrench:wrench", {
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description = S("Wrench"),
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inventory_image = "technic_wrench.png",
tool_capabilities = {
full_punch_interval = 0.9,
max_drop_level = 0,
groupcaps = {
crumbly = {times={[2]=3.00, [3]=0.70}, uses=0, maxlevel=1},
snappy = {times={[3]=0.40}, uses=0, maxlevel=1},
oddly_breakable_by_hand = {times={[1]=7.00,[2]=4.00,[3]=1.40},
uses=0, maxlevel=3}
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},
damage_groups = {fleshy=1},
},
on_place = function(itemstack, placer, pointed_thing)
local pos = pointed_thing.under
if not placer or not pos then
return
end
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local player_name = placer:get_player_name()
if minetest.is_protected(pos, player_name) then
minetest.record_protection_violation(pos, player_name)
return
end
local node_name = minetest.get_node(pos).name
local def = wrench.registered_nodes[node_name]
if not def then
return
end
local stack_pickup = ItemStack(get_pickup_name(node_name))
local player_inv = placer:get_inventory()
if not player_inv:room_for_item("main", stack_pickup) then
return
end
local meta = minetest.get_meta(pos)
if def.owned and not minetest.check_player_privs(placer, "protection_bypass") then
local owner = meta:get_string("owner")
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if owner and owner ~= player_name then
minetest.log("action", player_name..
" tried to pick up an owned node belonging to "..
owner.." at "..
minetest.pos_to_string(pos))
return
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end
end
-- Do the actual pickup:
local metadata = {}
metadata.name = node_name
metadata.version = LATEST_SERIALIZATION_VERSION
-- Serialize inventory lists + items
local inv = meta:get_inventory()
local lists = {}
for _, listname in pairs(def.lists or {}) do
local list = inv:get_list(listname)
for i, stack in pairs(list) do
list[i] = stack:to_string()
end
lists[listname] = list
end
metadata.lists = lists
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-- Serialize node metadata fields
local item_meta = stack_pickup:get_meta()
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metadata.metas = {}
for key, meta_type in pairs(def.metas or {}) do
if meta_type == wrench.META_TYPE_INT then
metadata.metas[key] = meta:get_int(key)
elseif meta_type == wrench.META_TYPE_FLOAT then
metadata.metas[key] = meta:get_float(key)
elseif meta_type == wrench.META_TYPE_STRING then
metadata.metas[key] = meta:get_string(key)
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end
end
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item_meta:set_string("data", minetest.serialize(metadata))
minetest.remove_node(pos)
itemstack:add_wear(65535 / 20)
player_inv:add_item("main", stack_pickup)
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return itemstack
end,
})