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shop_controller_example.lua
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shop_controller_example.lua
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--
--License: GNU AGPL
--Copyright Ghaydn ([email protected]), 2021
--
--https://github.com/Ghaydn/minetest-lua-shop
--
--Shop controller
--allows you to sell things using different currencies
--------------------------------------
-- ~ digiline
-- b button
-- C luacontroller (this)
-- w vacuum tube
-- t digiline detecting tube
-- = pneumatic tube
-- H chest
-- > digiline fulter-injector (channel: "flt")
-- l LCD (channel: "lcd")
--------------------------------------
-- l~
-- bCb~
-- wt=H>=
--------------------------------------
--digilines must connect luacontroller with detecting tube, LCD and digiline filter-injector.
--------------------------------------
--what we sell - you can place here any items
--"name" is what player will see on the lcd
--"item" is itemstack string
--"stock" is how much you have it in the chest
--"price" is price
--don't forget to place your goods into the chest
local gds = {
{name = "Mining laser mk3", item = "technic:laser_mk3", stock = 3, price = 60},
{name = "Mining drill mk2", item = "technic:mining_drill_mk2", stock = 9, price = 30},
{name = "Prospector", item = "technic:prospector", stock = 4, price = 30},
{name = "Vacuum Cleaner", item = "technic:vacuum", stock = 4, price = 30},
{name = "Chainsaw", item = "technic:chainsaw", stock = 4, price = 30},
}
--what we buy for
--describe your money instead of thesea
local money = {
["default:diamond"] = 1,
["default:diamondblock"] = 9,
["technic:uranium_lump"] = 2,
["crimeaion:coin5"] = 5,
["crimeaion:coin10"] = 10,
["crimeaion:coin25"] = 25,
["crimeaion:bag"] = 100,
["crimeaion:bag5"] = 500,
["crimeaion:bag10"] = 1000,
["crimeaion:box50"] = 5000,
["crimeaion:bag100"] = 10000
}
pin_left = "D" --button
pin_right = "B" --button
return_time = 5 --depends on the tube length
local update_lcd = function()
if #mem.var.gds == 0 then
digiline_send("lcd", "Everything sold. Shop is CLOSED")
else
if mem.var.current > #mem.var.gds then
mem.var.current = 1
end
local product = mem.var.gds[mem.var.current]
digiline_send("lcd", product.name .. ", price: " .. product.price .. ", paid: " .. mem.var.payment)
end
end
--initializing
if event.type == "program" then
mem.var = {
gds = gds,
inserted = {},
current = 1,
payment = 0,
was = 0,
returns = {},
}
digiline_send("lcd", "Shop ready, " .. tostring(event))
interrupt(1, "ready")
end
--presssing buttons
if event.type == "on" then
if #mem.var.gds == 0 then return end
--reset and return any payment
for i, v in pairs(mem.var.inserted) do
table.insert(mem.var.returns, v)
end
mem.var.inserted = {}
mem.var.payment = mem.var.was
interrupt(return_time, "return")
--select next product
if event.pin.name == pin_left then
mem.var.current = mem.var.current - 1
if mem.var.current <= 0 then
mem.var.current = #mem.var.gds
end
elseif event.pin.name == pin_right then
mem.var.current = mem.var.current + 1
if mem.var.current > #mem.var.gds then
mem.var.current = 1
end
end
update_lcd()
end
--something is in the tube
if event.type == "digiline" and event.channel == "item" then
if #mem.var.gds == 0 then
table.insert(mem.var.returns, event.msg)
interrupt(return_time, "return")
return
end
local item = event.msg
local count = tonumber(event.msg:sub(-2))
if count == nil then count = 1 end
if count > 9 then
item = event.msg:sub(1, -3)
elseif count > 1 then
item = event.msg:sub(1, -2)
end
if item:sub(-1) == " " then
item = item:sub(1, -2)
else
item = event.msg
count = 1
end
local payment = money[item]
--incorrect money
if payment == nil then
table.insert(mem.var.returns, event.msg)
interrupt(return_time, "return")
interrupt(1, "incorrect")
local itemname = event.msg
local length = itemname:len()
local position = 12--itemname:find(":")
local output = itemname:sub(1, position) .. "\n"
while position < length do
output = output .. itemname:sub(position + 1, position + 12) .. "\n"
position = position + 12
end
digiline_send("lcd", "incorrect item: " .. output)
--correct money
else
table.insert(mem.var.inserted, event.msg)
payment = payment * count
mem.var.payment = mem.var.payment + payment
local product = mem.var.gds[mem.var.current]
local quantity = math.floor(mem.var.payment / product.price)
if product.stock < quantity then quantity = product.stock end
--enough, let's buy
if quantity >= 1 then
--buy 1 right now
mem.var.payment = mem.var.payment - product.price * quantity
digiline_send("flt", product.item)
product.stock = product.stock - quantity
--buy more later
if quantity > 1 then
for i = 1, quantity - 1 do
table.insert(mem.var.returns, product.item)
end
interrupt(1, "return")
end
--change internal storage data
if product.stock <= 0 then
table.remove(mem.var.gds, mem.var.current)
end
mem.var.inserted = {}
mem.var.was = mem.var.payment
digiline_send("lcd", "SOLD!")
interrupt(2, "sold")
--not enough
else
update_lcd()
end
end
end
if event.type == "interrupt" then
--turning on
if event.iid == "ready" then
mem.var.current = 1
update_lcd()
--reset after the incorrect item was inserted
elseif event.iid == "incorrect" then
update_lcd()
--return anything
elseif event.iid == "return" then
if #mem.var.returns > 0 then
digiline_send("flt", mem.var.returns[1])
table.remove(mem.var.returns, 1)
if #mem.var.returns > 0 then
interrupt(return_time/2, "return")
end
end
--reset after sale
elseif event.iid == "sold" then
if mem.var.current > #mem.var.gds then
mem.var.current = 1
end
update_lcd()
end
end