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--[[
Exchange Shop [bitchange]
This code is based on the idea of Dan Duncombe's exchange shop
https://web.archive.org/web/20160403113102/https://forum.minetest.net/viewtopic.php?id=7002
You do not need the entire bitchange mod to use this code.
Make sure you've got all textures to use it in a separate mod.
License: WTFPL
]]
if not bitchange then
-- Default values, if bitchange wasn't found.
bitchange = {}
bitchange.exchangeshop_pipeworks = true
function bitchange.has_access(owner, player_name)
if player_name == owner or owner == "" then
return true
end
local privs = minetest.get_player_privs(player_name)
return privs.server or privs.protection_bypass
end
end
local exchange_shop = {}
-- Tool wear aware replacement for contains_item.
local function list_contains_item(inv, listname, stack)
local count = stack:get_count()
if count == 0 then
return true
end
local list = inv:get_list(listname)
local name = stack:get_name()
local wear = stack:get_wear()
for _, list_stack in pairs(list) do
if list_stack:get_name() == name and
list_stack:get_wear() <= wear then
if list_stack:get_count() >= count then
return true
else
count = count - list_stack:get_count()
end
end
end
end
-- Tool wear aware replacement for remove_item.
local function list_remove_item(inv, listname, stack)
local wanted = stack:get_count()
if wanted == 0 then
return stack
end
local list = inv:get_list(listname)
local name = stack:get_name()
local wear = stack:get_wear()
local remaining = wanted
local removed_wear = 0
for index, list_stack in pairs(list) do
if list_stack:get_name() == name and
list_stack:get_wear() <= wear then
local taken_stack = list_stack:take_item(remaining)
inv:set_stack(listname, index, list_stack)
removed_wear = math.max(removed_wear, taken_stack:get_wear())
remaining = remaining - taken_stack:get_count()
if remaining == 0 then
break
end
end
end
-- Todo: Also remove kebab
local removed_stack = ItemStack(name)
removed_stack:set_count(wanted - remaining)
removed_stack:set_wear(removed_wear)
return removed_stack
end
local function get_exchange_shop_formspec(mode, pos, title)
local name = "nodemeta:"..pos.x..","..pos.y..","..pos.z
if mode == "customer" then
-- customer
return (
"size[8,9;]"..
"label[0,0;Exchange shop]"..
"label[1,0.5;Owner needs:]"..
"list["..name..";cust_ow;1,1;2,2;]"..
"button[3,2.4;2,1;exchange;Exchange]"..
"label[5,0.5;Owner gives:]"..
"list["..name..";cust_og;5,1;2,2;]"..
"label[0.7,3.5;Ejected items:]"..
"label[0.7,3.8;(Remove me!)]"..
"list["..name..";cust_ej;3,3.5;4,1;]"..
"list[current_player;main;0,5;8,4;]"..
"listring["..name..";custm_ej]"..
"listring[current_player;main]"
)
end
if mode == "owner_custm"
or mode == "owner_stock" then
-- owner
local formspec = (
"size[11,10;]"..
"label[0.3,0.1;Title:]"..
"field[1.5,0.5;3,0.5;title;;"..title.."]"..
"field_close_on_enter[title;false]"..
"button[4.1,0.2;1,0.5;set_title;Set]"..
"label[0,0.7;You need:]"..
"list["..name..";cust_ow;0,1.2;2,2;]"..
"label[3,0.7;You give:]"..
"list["..name..";cust_og;3,1.2;2,2;]"..
"label[0,3.5;Ejected items: (Remove me!)]"..
"list["..name..";custm_ej;0,4;4,1;]"..
"label[6,0;You are viewing:]"..
"label[6,0.3;(Click to switch)]"..
"listring["..name..";custm_ej]"..
"listring[current_player;main]"
)
if mode == "owner_custm" then
formspec = (formspec..
"button[8.5,0.2;2.5,0.5;vstock;Customers stock]"..
"list["..name..";custm;6,1;5,4;]"..
"listring["..name..";custm]"..
"listring[current_player;main]")
else
formspec = (formspec..
"button[8.5,0.2;2.5,0.5;vcustm;Your stock]"..
"list["..name..";stock;6,1;5,4;]"..
"listring["..name..";stock]"..
"listring[current_player;main]")
end
return (formspec..
"label[1,5;Use (E) + (Right click) for customer interface]"..
"list[current_player;main;1,6;8,4;]")
end
return ""
end
local function get_exchange_shop_tube_config(mode)
if mode == "groups" then
if bitchange.exchangeshop_pipeworks then
return {choppy=2, oddly_breakable_by_hand=2,
tubedevice=1, tubedevice_receiver=1}
end
return {choppy=2, oddly_breakable_by_hand=2}
end
if mode == "tube" then
if bitchange.exchangeshop_pipeworks then
return {
insert_object = function(pos, node, stack, direction)
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
return inv:add_item("stock", stack)
end,
can_insert = function(pos, node, stack, direction)
local meta = minetest.get_meta(pos)
local inv = meta:get_inventory()
return inv:room_for_item("stock", stack)
end,
input_inventory = "custm",
connect_sides = {left=1, right=1, back=1, top=1, bottom=1}
}
end
return {
insert_object = function()
return false
end,
can_insert = function()
return false
end,
connect_sides = {}
}
end
end
minetest.register_on_player_receive_fields(function(sender, formname, fields)
if formname ~= "bitchange:shop_formspec" then
return
end
local player_name = sender:get_player_name()
local pos = exchange_shop[player_name]
if not pos then
return
end
if fields.quit then
exchange_shop[player_name] = nil
return
end
local meta = minetest.get_meta(pos)
local title = meta:get_string("title")
local shop_owner = meta:get_string("owner")
if fields.title and bitchange.has_access(shop_owner, player_name) then
-- Limit title length
fields.title = fields.title:sub(1, 80)
if title ~= fields.title then
if fields.title ~= "" then
meta:set_string("infotext", "'" .. fields.title
.. "' (owned by " .. shop_owner .. ")")
else
meta:set_string("infotext", "Exchange shop (owned by "
.. shop_owner ..")")
end
meta:set_string("title", minetest.formspec_escape(fields.title))
end
end
if fields.exchange then
local shop_inv = meta:get_inventory()
if shop_inv:is_empty("cust_ow")
and shop_inv:is_empty("cust_og") then
return
end
if not shop_inv:is_empty("cust_ej")
or not shop_inv:is_empty("custm_ej") then
minetest.chat_send_player(player_name,
"One or multiple ejection fields are filled. "..
"Please empty them or contact the shop owner.")
return
end
local player_inv = sender:get_inventory()
local err_msg = ""
local cust_ow = shop_inv:get_list("cust_ow")
local cust_og = shop_inv:get_list("cust_og")
-- Check validness of stack "owner wants"
local cust_ow_ok = true
for i1, item1 in pairs(cust_ow) do
local name1 = item1:get_name()
for i2, item2 in pairs(cust_ow) do
if name1 == "" then
break
end
if i1 ~= i2 and name1 == item2:get_name() then
cust_ow_ok = false
break
end
end
if not cust_ow_ok then
err_msg = "The field 'Owner needs' can not contain multiple "..
"times the same items. Please contact the shop owner."
break
end
end
-- Check validness of stack "owner gives"
if err_msg == "" then
local cust_og_ok = true
for i1, item1 in pairs(cust_og) do
local name1 = item1:get_name()
for i2, item2 in pairs(cust_og) do
if name1 == "" then
break
end
if i1 ~= i2 and name1 == item2:get_name() then
cust_og_ok = false
break
end
end
if not cust_og_ok then
err_msg = "The field 'Owner gives' can not contain multiple "..
"times the same items. Please contact the shop owner."
break
end
end
end
-- Check for space in the shop
if err_msg == "" then
for i, item in pairs(cust_ow) do
if not shop_inv:room_for_item("custm", item) then
err_msg = "The stock in this shop is full. "..
"Please contact the shop owner."
break
end
end
end
-- Check availability of the shop's items
if err_msg == "" then
for i, item in pairs(cust_og) do
if not list_contains_item(shop_inv, "stock", item) then
err_msg = "This shop is sold out."
break
end
end
end
-- Check for space in the player's inventory
if err_msg == "" then
for i, item in pairs(cust_og) do
if not player_inv:room_for_item("main", item) then
err_msg = "You do not have enough space in your inventory."
break
end
end
end
-- Check availability of the player's items
if err_msg == "" then
for i, item in pairs(cust_ow) do
if not list_contains_item(player_inv, "main", item) then
err_msg = "You do not have the required items."
break
end
end
end
-- Do the exchange!
if err_msg == "" then
local fully_exchanged = true
for i, item in pairs(cust_ow) do
local stack = list_remove_item(player_inv, "main", item)
if shop_inv:room_for_item("custm", stack) then
shop_inv:add_item("custm", stack)
else
-- Move to ejection field
shop_inv:add_item("custm_ej", stack)
fully_exchanged = false
end
end
for i, item in pairs(cust_og) do
local stack = list_remove_item(shop_inv, "stock", item)
if player_inv:room_for_item("main", stack) then
player_inv:add_item("main", stack)
else
-- Move to ejection field
shop_inv:add_item("cust_ej", stack)
fully_exchanged = false
end
end
if not fully_exchanged then
err_msg = "Warning! Stacks are overflowing somewhere!"
end
end
-- Throw error message
if err_msg ~= "" then
minetest.chat_send_player(player_name, "Exchange shop: "..err_msg)
end
elseif bitchange.has_access(shop_owner, player_name) then
local mode
if fields.vcustm then
mode = "owner_custm"
elseif fields.vstock then
mode = "owner_stock"
else
return
end
minetest.show_formspec(player_name, "bitchange:shop_formspec",
get_exchange_shop_formspec(mode, pos, title))
end
end)
minetest.register_node(":bitchange:shop", {
description = "Shop",
tiles = {"bitchange_shop_top.png", "bitchange_shop_top.png",
"bitchange_shop_side.png", "bitchange_shop_side.png",
"bitchange_shop_side.png", "bitchange_shop_front.png"},
paramtype2 = "facedir",
groups = get_exchange_shop_tube_config("groups"),
tube = get_exchange_shop_tube_config("tube"),
sounds = default.node_sound_wood_defaults(),
after_place_node = function(pos, placer)
local meta = minetest.get_meta(pos)
meta:set_string("owner", placer:get_player_name())
meta:set_string("infotext", "Exchange shop (owned by "..
meta:get_string("owner")..")")
end,
on_construct = function(pos)
local meta = minetest.get_meta(pos)
meta:set_string("infotext", "Exchange shop (constructing)")
meta:set_string("formspec", "")
meta:set_string("owner", "")
local inv = meta:get_inventory()
inv:set_size("stock", 5*4) -- needed stock for exchanges
inv:set_size("custm", 5*4) -- stock of the customers exchanges
inv:set_size("custm_ej", 4) -- ejected items if shop has no inventory room
inv:set_size("cust_ow", 2*2) -- owner wants
inv:set_size("cust_og", 2*2) -- owner gives
inv:set_size("cust_ej", 4) -- ejected items if player has no inventory room
end,
can_dig = function(pos,player)
local meta = minetest.get_meta(pos);
local inv = meta:get_inventory()
if inv:is_empty("stock") and inv:is_empty("custm")
and inv:is_empty("cust_ow") and inv:is_empty("custm_ej")
and inv:is_empty("cust_og") and inv:is_empty("cust_ej") then
return true
end
minetest.chat_send_player(player:get_player_name(),
"Cannot dig exchange shop: one or multiple stocks are in use.")
return false
end,
on_rightclick = function(pos, node, clicker, itemstack)
local meta = minetest.get_meta(pos)
local player_name = clicker:get_player_name()
local mode = "customer"
if bitchange.has_access(meta:get_string("owner"), player_name) and
not clicker:get_player_control().aux1 then
mode = "owner_custm"
end
exchange_shop[player_name] = pos
minetest.show_formspec(player_name, "bitchange:shop_formspec",
get_exchange_shop_formspec(mode, pos, meta:get_string("title")))
end,
allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
local meta = minetest.get_meta(pos)
if bitchange.has_access(meta:get_string("owner"), player:get_player_name()) then
return count
end
return 0
end,
allow_metadata_inventory_put = function(pos, listname, index, stack, player)
if player:get_player_name() == ":pipeworks" then
return stack:get_count()
end
if listname == "custm" then
minetest.chat_send_player(player:get_player_name(),
"Exchange shop: Please press 'Customers stock' and insert your items there.")
return 0
end
local meta = minetest.get_meta(pos)
if bitchange.has_access(meta:get_string("owner"), player:get_player_name())
and listname ~= "cust_ej"
and listname ~= "custm_ej" then
return stack:get_count()
end
return 0
end,
allow_metadata_inventory_take = function(pos, listname, index, stack, player)
if player:get_player_name() == ":pipeworks" then
return stack:get_count()
end
local meta = minetest.get_meta(pos)
if bitchange.has_access(meta:get_string("owner"), player:get_player_name())
or listname == "cust_ej" then
return stack:get_count()
end
return 0
end,
})
minetest.register_craft({
output = "bitchange:shop",
recipe = {
{"default:sign_wall"},
{"default:chest_locked"},
}
})
minetest.register_on_leaveplayer(function(player)
local player_name = player:get_player_name()
exchange_shop[player_name] = nil
end)
if minetest.get_modpath("wrench") and wrench then
local STRING = wrench.META_TYPE_STRING
wrench:register_node("bitchange:shop", {
lists = {"stock", "custm", "custm_ej", "cust_ow", "cust_og", "cust_ej"},
metas = {
owner = STRING,
infotext = STRING,
title = STRING,
},
owned = true
})
end
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