nalc/global_exchange
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global_exchange/exchange_machine.lua

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local exchange, formlib = ...
local search_cooldown = 2
local summary_interval = 600
local global_inv = nil
local S = minetest.get_translator("global_exchange")
-- NALC split() function
local function split(str, sep)
if not str then return "Item doesn't exist" end
local result = {}
local regex = ("([^%s]+)"):format(sep)
for each in str:gmatch(regex) do
local sub = nil
if #each > 34 then
sub = string.sub(each, 1, 34).."..."
end
table.insert(result, sub or each)
end
return result
end
local function is_integer(x)
return math.floor(x) == x
end
local function wear_string(wear)
if wear > 0 then
return "-" .. math.ceil(100 * wear / 65535) .. "%"
else
return "----"
end
end
local summary_fs = ""
local function mk_summary_fs()
local fs = formlib.Builder()
fs:tablecolumns("text", "text", "text", "text", "text", "text", "text")
fs:table(0,0, 11.75,9, "summary_table", function(add_row)
add_row("Item",
"Description",
S("Wear"),
S("Buy Vol"),
S("Buy Max"),
S("Sell Vol"),
S("Sell Min"))
local all_items = minetest.registered_items
for i, row in ipairs(exchange:market_summary()) do
local def = all_items[row.Item] or {}
add_row(#row.Item > 24 and string.sub(row.Item, 1, 24).."..." or row.Item,
split(def.description, "\n")[1] or S("No description"),
wear_string(row.Wear),
row.Buy_Volume or 0,
row.Buy_Max or "N/A",
row.Sell_Volume or 0,
row.Sell_Min or "N/A")
end
end)
summary_fs = tostring(fs)
end
minetest.after(0, mk_summary_fs)
local elapsed = 0
minetest.register_globalstep(function(dtime)
elapsed = elapsed + dtime
if elapsed >= summary_interval then
mk_summary_fs()
elapsed = 0
end
end)
local wear_levels = {
[1] = { index = 1, text = S("New (-0%)"), wear = math.floor(0.00*65535) },
[2] = { index = 2, text = S("Good (-10%)"), wear = math.floor(0.10*65535) },
[3] = { index = 3, text = S("Worn (-50%)"), wear = math.floor(0.50*65535) },
[4] = { index = 4, text = S("Junk (-100%)"), wear = math.floor(1.00*65535) },
}
-- Allow lookup by text label as well as index
for _,v in ipairs(wear_levels) do
wear_levels[tostring(v.text)] = v
end
local main_state = {}
-- ^ A per-player state for the main form.
minetest.register_on_joinplayer(function(player)
exchange:new_account(player:get_player_name()) --just to make sure
main_state[player:get_player_name()] = {
tab = 1,
buy_item = "",
buy_wear = wear_levels[1].text,
buy_price = "",
buy_amount = "1",
buy_filter = "",
sell_price = "",
buy_page = 1,
buy_pagemax = 0,
selected_index = 0,
filtered_list = nil,
}
end)
minetest.register_on_leaveplayer(function(player)
main_state[player:get_player_name()] = nil
end)
-- Something similar to creative inventory
local pagemax = 1
local pagewidth = 12
local pageheight = 4
local pageitems = pagewidth * pageheight
local selectable_list = {}
-- Create inventory list after loading all mods
minetest.after(0, function()
for name, def in pairs(minetest.registered_items) do
if (def.groups.not_in_creative_inventory or 0) == 0 and
(split(def.description, "\n")[1] or "") ~= "" then
selectable_list[#selectable_list + 1] = name
end
end
table.sort(selectable_list)
pagemax = math.max(math.ceil(#selectable_list / pageitems), 1)
end)
local function filter_list(filter)
local filtered_list = {}
if not filter or filter == "" then return nil, pagemax end
for index, name in ipairs(selectable_list) do
local match = string.match(name, filter) or nil
if match then
filtered_list[#filtered_list+1] = name
end
end
return filtered_list, math.max(math.ceil(#filtered_list / pageitems), 1)
end
local main_form = "global_exchange:exchange_main"
local function table_from_results(fs, results, name, x, y, w, h, selected)
fs:tablecolumns("text", "text", "text", "text", "text", "text", "text")
fs:table(x,y, w,h, name, function(add_row)
add_row(S("Poster"), "Type", "Item",
"Description",
S("Wear"), S("Qty"), S("Rate"))
local all_items = minetest.registered_items
for i, row in ipairs(results) do
local def = all_items[row.Item] or {}
add_row(row.Poster, row.Type, row.Item,
split(def.description, "\n")[1] or S("Unknown Item"),
wear_string(row.Wear), row.Amount, row.Rate)
end
end, math.max(0, tonumber(selected) or 0) + 1)
end
local function mk_main_market_fs(fs, p_name, state)
fs(summary_fs)
end
local function mk_main_order_book_fs(fs, p_name, x, y, w, h, item_name)
local order_book = exchange:order_book("", item_name)
fs:tablecolumns("text", "text", "text", "text")
fs:table(x,y, w,h, "order_book", function(add_row)
add_row("Type", S("Rate"), S("Wear"), S("Qty"))
for _,row in ipairs(order_book) do
add_row(row.Type, row.Rate, wear_string(row.Wear), row.Amount)
end
end, 1)
end
local function mk_main_buy_fs(fs, p_name, state)
mk_main_order_book_fs(fs, p_name, 0, 0, 8.75, 3.75, state.buy_item)
fs:item_image_button(9,0, 1,1, "buy_item", state.buy_item)
fs:field(10.25,0.40, 2,1, "buy_amount", S("Quantity"), state.buy_amount, false)
local wear = wear_levels[state.buy_wear] or wear_levels[1]
fs:dropdown(9,1, 3, "buy_wear", function(add_item)
for _,v in ipairs(wear_levels) do
add_item(v.text)
end
end, wear.index)
fs:field(9.35,2.40, 2.9,1, "buy_price", S("Bid (ea.)"), state.buy_price, false)
fs:button(9,3, 3,1, "buy", S("Place Bid"))
fs:container(0,4, function()
fs:button( 0,0.25, 1,1, "buy_left", "<<")
fs:button( 1,0.25, 2,1, "position", state.buy_page .. "/" .. state.buy_pagemax)
fs:button(3,0.25, 1,1, "buy_right", ">>")
fs:field(5.28,0.55, 3,1, "buy_filter", S("Filter"), state.buy_filter, false)
fs:button(8, 0.25, 2,1, "filter", S("Search"))
fs:button(10, 0.25, 2,1, "reset_filter", S("Reset"))
local firstitem = ((state.buy_page - 1) * pageitems)
local item_list = state.filtered_list or selectable_list
for y=0,(pageheight-1) do
for x=0,(pagewidth-1) do
local index = firstitem + (pagewidth * y) + x + 1
if item_list[index] then
fs:item_image_button(x,1.25+y, 1,1, "select_" .. index, item_list[index])
end
end
end
end)
end
local function mk_main_sell_fs(fs, p_name, state)
local sell_stack = global_inv:get_stack("p_" .. p_name, 1)
local sell_item = (not sell_stack:is_empty()
and sell_stack:get_name()) or ""
mk_main_order_book_fs(fs, p_name, 0, 0, 8.75, 3.75, sell_item)
fs:list(9,0, 1,1, "detached:global_exchange", "p_" .. p_name)
fs:field(9.35,2.40, 2.9,1, "sell_price", S("Ask (ea.)"), state.sell_price, false)
fs:button(9,3, 3,1, "sell", S("Sell"))
fs:box(1.9375,5.1875, 7.96875,4.03, "#00000020")
fs:list(2,5.25, 8,4, "current_player", "main")
end
local function mk_main_own_orders_fs(fs, p_name, state)
if not state.own_results then
state.own_results = exchange:search_player_orders(p_name) or {}
end
state.selected_index = math.min(state.selected_index or 0, #state.own_results)
table_from_results(fs, state.own_results, "result_table", 0, 0, 11.75, 8.5, state.selected_index)
fs:button(4.5,8.5, 3,1, "cancel", S("Cancel Order"))
end
local main_tabs = {
[1] = { text = S("Market"), mk_fs = mk_main_market_fs },
[2] = { text = S("Buy"), mk_fs = mk_main_buy_fs },
[3] = { text = S("Sell"), mk_fs = mk_main_sell_fs },
[4] = { text = S("My Orders"), mk_fs = mk_main_own_orders_fs },
}
local function mk_main_fs(fs, p_name, err_str, success)
local state = main_state[p_name]
if not state then return end -- Should have been initialized on player join
fs:size(12,10)
fs:bgcolor("#606060", false)
fs:tabheader(0,0.65, "tab", function(add_tab)
for _,tab in ipairs(main_tabs) do
add_tab(tab.text)
end
end, state.tab or 1, false, true)
local bal = exchange:get_balance(p_name)
fs:label(0,0.37, "Balance: " .. bal)
if err_str then
fs:label(4,0.37, err_str)
elseif success then
fs:label(4,0.37, "Success!")
end
if main_tabs[state.tab] then
fs:container(0,1, main_tabs[state.tab].mk_fs, p_name, state)
end
end
local function show_main(p_name, err_str, success)
local fs = formlib.Builder()
mk_main_fs(fs, p_name, err_str, success)
minetest.show_formspec(p_name, main_form, tostring(fs))
end
minetest.register_on_joinplayer(function(player)
-- the inventory list name (for selling) is "p_"..player_name
global_inv:set_size("p_" .. player:get_player_name(), 1)
end)
-- Returns success, and also returns an error message if failed.
local function post_buy(player, ex_name, item_name, wear_str, amount_str, rate_str)
local p_name = player:get_player_name()
if (item_name or "") == "" then
return false, S("You must input an item")
elseif not minetest.registered_items[item_name] then
return false, S("That item does not exist.")
end
local wear_level = wear_levels[wear_str]
if not wear_level then
return false, S("Invalid wear.")
end
local amount = tonumber(amount_str)
local rate = tonumber(rate_str)
if not amount or not is_integer(amount) or amount < 1 then
return false, S("Invalid amount.")
elseif not rate or not is_integer(rate) or rate < 1 then
return false, S("Invalid rate.")
end
local p_inv = player:get_inventory()
local stack = ItemStack(item_name)
local succ, res = exchange:buy(p_name, ex_name, item_name, wear_level.wear, amount, rate)
if not succ then
return false, res
end
for _,row in ipairs(res) do
stack:set_count(row.amount)
stack:set_wear(row.wear)
local leftover = p_inv:add_item("main", stack)
-- Put anything that won't fit in the inventory in the player's inbox
if not leftover:is_empty() then
exchange:put_in_inbox(p_name, item_name, row.wear, leftover:get_count())
end
end
-- Refresh market summary "soonish"
elapsed = math.max(elapsed, summary_interval - 5)
return true
end
-- Returns success, and also returns an error message if failed.
-- The item to sell is determined by the player's list in global_inv.
local function post_sell(player, ex_name, rate_str)
local p_name = player:get_player_name()
local stack = global_inv:get_stack("p_" .. p_name, 1)
if not stack or stack:is_empty() then
return false, S("You must input an item")
elseif not minetest.registered_items[stack:get_name()] then
return false, S("That item does not exist.")
end
if stack.get_meta then
local meta = stack:get_meta()
local def_meta = ItemStack(stack:get_name()):get_meta()
if not stack:get_meta():equals(def_meta) then
return false, S("Cannot sell an item with metadata.")
end
elseif (stack:get_metadata() or "") ~= "" then
return false, S("Cannot sell an item with metadata.")
end
local rate = tonumber(rate_str)
if not rate or not is_integer(rate) or rate < 1 then
return false, S("Invalid rate.")
end
local item_name = stack:get_name()
local wear = stack:get_wear()
local amount = stack:get_count()
local succ, res = exchange:sell(p_name, ex_name, item_name, wear, amount, rate)
if not succ then
return false, res
end
stack:clear()
global_inv:set_stack("p_" .. p_name, 1, stack)
-- Refresh market summary "soonish"
elapsed = math.max(elapsed, summary_interval - 5)
return true
end
local function handle_main(player, fields)
local p_name = player:get_player_name()
local state = main_state[p_name]
local copy_fields = {
"buy_wear",
"buy_amount",
"buy_price",
"buy_filter",
"sell_price"
}
for _,k in ipairs(copy_fields) do
if fields[k] then
state[k] = fields[k]
end
end
if state.buy_pagemax == 0 then
state.buy_pagemax = pagemax
end
if fields.tab then
state.tab = tonumber(fields.tab) or 1
show_main(p_name)
end
if fields.buy_left then
state.buy_page = (((state.buy_page or 1) + ((2*state.buy_pagemax-1) - 1)) % state.buy_pagemax) + 1
show_main(p_name)
end
if fields.buy_right then
state.buy_page = (((state.buy_page or 1) + ((2*state.buy_pagemax-1) + 1)) % state.buy_pagemax) + 1
show_main(p_name)
end
local item_list = state.filtered_list or selectable_list
for name in pairs(fields) do
local index = tonumber(string.match(name, "select_([0-9]+)"))
if index and index >= 1 and index <= #item_list then
state.buy_item = item_list[index]
show_main(p_name)
end
end
if fields.buy then
local succ, err =
post_buy(player, "", state.buy_item, fields.buy_wear,
fields.buy_amount, fields.buy_price)
if succ then
state.buy_amount = "1"
state.buy_price = ""
state.own_results = nil
show_main(p_name, nil, true)
else
show_main(p_name, err)
end
end
if fields.filter then
state.filtered_list, state.buy_pagemax = filter_list(state.buy_filter)
state.buy_page = 1
show_main(p_name)
end
if fields.reset_filter then
state.buy_filter = ""
state.filtered_list, state.buy_pagemax = filter_list(nil)
state.buy_page = 1
show_main(p_name)
end
if fields.sell then
local succ, err = post_sell(player, "", fields.sell_price)
if succ then
state.sell_price = ""
state.own_results = nil
show_main(p_name, nil, true)
else
show_main(p_name, err)
end
end
local idx = state.selected_index
local own_results = state.own_results or {}
if fields.cancel and own_results[idx] then
local succ, res = exchange:cancel_order(p_name, own_results[idx].Id)
if succ then
if res.Type == "sell" then
local p_inv = player:get_inventory()
local stack = ItemStack(res.Item)
stack:set_count(res.Amount)
stack:set_wear(res.Wear)
local leftover = p_inv:add_item("main", stack)
-- Put anything that won't fit in the inventory in the player's inbox
if not leftover:is_empty() then
exchange:put_in_inbox(p_name, res.Item, res.Wear, leftover:get_count())
end
end
-- Refresh market summary "soonish"
elapsed = math.max(elapsed, summary_interval - 5)
end
state.own_results = nil
show_main(p_name)
end
if fields.result_table then
local event = minetest.explode_table_event(fields.result_table)
if event.type == "CHG" then
state.selected_index = event.row - 1
show_main(p_name)
end
end
if fields.quit then
-- Return the player's unsold inventory, if any
local stack = global_inv:get_stack("p_" .. p_name, 1)
local p_inv = player:get_inventory()
local leftover = p_inv:add_item("main", stack)
-- Whatever doesn't fit in the player's inventory stays in the form.
-- Note that any items in the form when the server exits are lost.
global_inv:set_stack("p_" .. p_name, 1, leftover)
state.own_results = nil
end
end
minetest.register_on_player_receive_fields(function(player, formname, fields)
if formname == main_form then
handle_main(player, fields)
else
return
end
return true
end)
global_inv = minetest.create_detached_inventory("global_exchange", {
allow_move = function(inv,from_list,from_index,to_list,to_index,count,player)
return 0
end,
allow_put = function(inv,to_list,to_index,stack,player)
local p_name = player:get_player_name()
if to_list == "p_" .. p_name then
return stack:get_count()
else
return 0
end
end,
allow_take = function(inv,from_list,from_index,stack,player)
local p_name = player:get_player_name()
if from_list == "p_" .. p_name then
return stack:get_count()
else
return 0
end
end,
on_put = function(inv,to_list,to_index,stack,player)
show_main(player:get_player_name())
end,
on_take = function(inv,from_list,from_index,stack,player)
show_main(player:get_player_name())
end,
})
minetest.register_node("global_exchange:exchange", {
description = "Exchange Terminal",
drawtype = "nodebox",
tiles = {
"global_exchange_terminal_top.png",
"global_exchange_terminal_bottom.png",
"global_exchange_terminal_right.png",
"global_exchange_terminal_right.png^[transform4",
"global_exchange_terminal_back.png",
"global_exchange_terminal_front.png",
},
paramtype = "light",
paramtype2 = "facedir",
groups = {cracky=2},
is_ground_content = false,
stack_max = 1,
light_source = 3,
node_box = {
type = "fixed",
fixed = {
{-8/16, -4/16, 3/16, 8/16, 8/16, 5/16},--screens
{-1/16, -7/16, 5/16, 1/16, 5/16, 7/16},--screen leg
{-3/16, -8/16, 4/16, 3/16, -7/16, 8/16},--leg platform
{-7/16, -8/16, -8/16, 2/16, -6/16, -3/16},--keyboard
{ 3/16, -8/16, -3/16, 7/16, -7/16, 3/16},--phone low
{ 4/16, -7/16, -1/16, 6/16, -6/16, 3/16},--phone hi
{ 2/16, -7/16, 0/16, 8/16, -5/16, 2/16},--phone speaker
}
},
on_rightclick = function(_, _, clicker)
local p_name = clicker:get_player_name()
local state = main_state[p_name]
if state then
state.search_results = {}
end
show_main(p_name)
end,
})
minetest.register_craft( {
output = "global_exchange:exchange",
recipe = {
{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
{ "default:mese_crystal", "default:steel_ingot", "default:diamond" },
{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
}
})
-- vim:set ts=4 sw=4 noet:
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