Trade: Add function to store trade offers on NPC data based on the trading status.
Add support to avoid flipping sold items out of stock to buy immediately.
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zorman2000
parent
b3b9bf393f
commit
d8b90d95c3
48
npc.lua
48
npc.lua
@ -381,16 +381,16 @@ local function choose_spawn_items(self)
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minetest.log("Initial inventory: "..dump(self.inventory))
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end
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-- Creates new single buy and sell offers for NPCs that
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-- trade casually.
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local function select_casual_trade_offers(self)
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self.trader_data.buy_offers = {
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[1] = npc.trade.get_casual_trade_offer(self, npc.trade.OFFER_BUY)
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}
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self.trader_data.sell_offers = {
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[1] = npc.trade.get_casual_trade_offer(self, npc.trade.OFFER_SELL)
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}
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end
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-- -- Creates new single buy and sell offers for NPCs that
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-- -- trade casually.
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-- local function select_casual_trade_offers(self)
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-- self.trader_data.buy_offers = {
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-- [1] = npc.trade.get_casual_trade_offer(self, npc.trade.OFFER_BUY)
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-- }
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-- self.trader_data.sell_offers = {
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-- [1] = npc.trade.get_casual_trade_offer(self, npc.trade.OFFER_SELL)
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-- }
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-- end
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-- Spawn function. Initializes all variables that the
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-- NPC will have and choose random, starting values
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@ -464,13 +464,18 @@ local function npc_spawn(self, pos)
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-- It is mostly related to its occupation.
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-- If empty, the NPC will revert to casual trading
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-- If not, it will try to sell those that it have, and buy the ones it not.
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trade_list = {}
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trade_list = {
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sell = {},
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buy = {},
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both = {}
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}
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}
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-- Initialize trading offers if NPC is casual trader
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if ent.trader_data.trader_status == npc.trade.CASUAL then
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select_casual_trade_offers(ent)
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end
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-- Initialize trading offers for NPC
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--npc.trade.generate_trade_offers_by_status(ent)
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-- if ent.trader_data.trader_status == npc.trade.CASUAL then
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-- select_casual_trade_offers(ent)
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-- end
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-- Actions data
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ent.actions = {
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@ -526,14 +531,13 @@ local function npc_spawn(self, pos)
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end
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-- Dedicated trade test
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ent.trader_data.trade_list = {
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"default:tree",
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"default:cobble",
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"default:wood"
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ent.trader_data.trade_list.both = {
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["default:tree"] = {},
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["default:cobble"] = {},
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["default:wood"] = {}
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}
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local trade_offers = npc.trade.get_trade_offers_for_dedicated_trader(ent)
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minetest.log("Trade offers: "..dump(trade_offers))
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npc.trade.generate_trade_offers_by_status(ent)
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-- npc.add_action(ent, npc.action.stand, {self = ent})
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-- npc.add_action(ent, npc.action.stand, {self = ent})
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104
trade/trade.lua
104
trade/trade.lua
@ -22,7 +22,7 @@ npc.trade.CASUAL_TRADE_BUY_DIALOGUE = {
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casual_trade_type = npc.trade.OFFER_BUY,
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responses = {
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[1] = {
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text = "Yes, let's see what you are looking for",
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text = "Sell",
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action_type = "function",
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response_id = 1,
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action = function(self, player)
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@ -38,7 +38,7 @@ npc.trade.CASUAL_TRADE_SELL_DIALOGUE = {
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casual_trade_type = npc.trade.OFFER_SELL,
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responses = {
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[1] = {
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text = "Yes, let's see what you have",
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text = "Buy",
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action_type = "function",
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response_id = 1,
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action = function(self, player)
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@ -122,6 +122,38 @@ function npc.trade.get_random_trade_status()
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end
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end
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-- This function generates and stores on the NPC data trade
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-- offers depending on the trader status.
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function npc.trade.generate_trade_offers_by_status(self)
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-- Get trader status
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local status = self.trader_data.trader_status
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-- Check what is the trader status
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if status == npc.trade.NONE then
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-- For none, clear all offers
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self.trader_data.buy_offers = {}
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self.trader_data.sell_offers = {}
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elseif status == npc.trade.CASUAL then
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-- For casual, generate one buy and one sell offer
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self.trader_data.buy_offers = {
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[1] = npc.trade.get_casual_trade_offer(self, npc.trade.OFFER_BUY)
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}
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self.trader_data.sell_offers = {
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[1] = npc.trade.get_casual_trade_offer(self, npc.trade.OFFER_SELL)
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}
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elseif status == npc.trade.TRADER then
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-- Get trade offers for a dedicated trader
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local offers = npc.trade.get_dedicated_trade_offers(self)
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-- Store buy offers
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for i = 1, #offers.buy do
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table.insert(self.trader_data.buy_offers, offers.buy[i])
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end
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-- Store sell offers
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for i = 1, #offers.sell do
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table.insert(self.trader_data.sell_offers, offers.sell[i])
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end
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end
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end
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-- Convenience method that retrieves all the currency
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-- items that a NPC has on his/her inventory
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function npc.trade.get_currencies_in_inventory(self)
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@ -198,43 +230,59 @@ end
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-- based on the trader list and the source of items. Initially, it will only
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-- be NPC inventories. In the future, it should support both NPC and chest
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-- inventories,
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function npc.trade.get_trade_offers_for_dedicated_trader(self)
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function npc.trade.get_dedicated_trade_offers(self)
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local offers = {
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for_sell = {},
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to_buy = {}
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sell = {},
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buy = {}
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}
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for i = 1, #self.trader_data.trade_list do
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local trade_list = self.trader_data.trade_list.both
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for item_name, trade_info in pairs(trade_list) do
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-- For each item on the trader list, check if it is in the NPC inventory.
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-- If it is, create a sell offer, else create a buy offer if possible.
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local item = npc.inventory_contains(self, self.trader_data.trade_list[i])
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local item = npc.inventory_contains(self, item_name)
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if item ~= nil then
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-- Create sell offer for this item. Currently, traders will offer to sell only
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-- of their items to allow the fine control for players to buy what they want.
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-- This requires, however, that the trade offers are re-generated everytime a
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-- sell is made.
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table.insert(offers.for_sell, npc.trade.create_offer(npc.trade.OFFER_SELL, self.trader_data.trade_list[i], nil, nil, 1))
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table.insert(offers.sell, npc.trade.create_offer(
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npc.trade.OFFER_SELL,
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item_name,
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nil,
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nil,
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1)
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)
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-- Set last offer type
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trade_info.last_offer_type = npc.trade.OFFER_SELL
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else
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-- Create buy offer for this item
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-- Only do if the NPC can actually afford the items.
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local currencies = npc.trade.get_currencies_in_inventory(self)
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-- Choose a random currency
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local chosen_tier = currencies[math.random(#currencies)]
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-- Get items for this currency
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local buyable_items =
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npc.trade.prices.get_items_for_currency_count(chosen_tier.name, chosen_tier.count, 0.5)
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-- Check if the item from trader list is present in the buyable items list
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for buyable_item, price_info in pairs(buyable_items) do
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if buyable_item == self.trader_data.trade_list[i] then
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-- If item found, create a buy offer for this item
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-- Again, offers are created for one item only. Buy offers should be removed
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-- after the NPC has bought a certain quantity, say, 5 items.
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table.insert(offers.to_buy, npc.trade.create_offer(
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npc.trade.OFFER_BUY,
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self.trader_data.trade_list[i],
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price_info.price,
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price_info.min_buyable_item_price,
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1))
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-- Avoid flipping an item to the buy side if the stock was just depleted
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if trade_info.last_offer_type ~= npc.trade.OFFER_SELL then
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-- Create buy offer for this item
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-- Only do if the NPC can actually afford the items.
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local currencies = npc.trade.get_currencies_in_inventory(self)
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-- Choose a random currency
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local chosen_tier = currencies[math.random(#currencies)]
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-- Get items for this currency
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local buyable_items =
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npc.trade.prices.get_items_for_currency_count(chosen_tier.name, chosen_tier.count, 0.5)
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-- Check if the item from trader list is present in the buyable items list
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for buyable_item, price_info in pairs(buyable_items) do
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if buyable_item == item_name then
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-- If item found, create a buy offer for this item
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-- Again, offers are created for one item only. Buy offers should be removed
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-- after the NPC has bought a certain quantity, say, 5 items.
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table.insert(offers.buy, npc.trade.create_offer(
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npc.trade.OFFER_BUY,
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item_name,
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price_info.price,
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price_info.min_buyable_item_price,
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price_info.min_buyable_item_count)
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)
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-- Set last offer type
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trade_info.last_offer_type = npc.trade.OFFER_BUY
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end
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end
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end
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end
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