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Trade: Working buy/sell trade mechanism.

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Various cleanups and modularizations for supporting dedicated traders.
Data: Added more favorite items for phase 1.
This commit is contained in:
zorman2000
2016-12-15 20:51:06 -05:00
parent 376c6e1df0
commit f717c3f1e5
5 changed files with 128 additions and 32 deletions
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89
trade/trade.lua
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@ -11,8 +11,8 @@ npc.trade.OFFER_SELL = "sell"
-- This table holds all responses for trades
npc.trade.results = {
casual = {},
formal = {}
single_trade_offer = {},
trade_offers = {}
}
-- Casual trader NPC dialogues definition
@ -26,7 +26,7 @@ npc.trade.CASUAL_TRADE_BUY_DIALOGUE = {
action_type = "function",
response_id = 1,
action = function(self, player)
npc.trade.show_casual_trade_formspec(self, player, npc.trade.OFFER_BUY)
npc.trade.show_trade_offer_formspec(self, player, npc.trade.OFFER_BUY)
end
}
}
@ -42,13 +42,13 @@ npc.trade.CASUAL_TRADE_SELL_DIALOGUE = {
action_type = "function",
response_id = 1,
action = function(self, player)
npc.trade.show_casual_trade_formspec(self, player, npc.trade.OFFER_SELL)
npc.trade.show_trade_offer_formspec(self, player, npc.trade.OFFER_SELL)
end
}
}
}
function npc.trade.show_casual_trade_formspec(self, player, offer_type)
function npc.trade.show_trade_offer_formspec(self, player, offer_type)
-- Strings for formspec, to include international support later
local prompt_string = " offers to buy from you"
@ -76,11 +76,12 @@ function npc.trade.show_casual_trade_formspec(self, player, offer_type)
"button_exit[4.1,3.3;2.9,0.5;no_option;"..npc.dialogue.NEGATIVE_ANSWER_LABEL.."]"
-- Create entry into results table
npc.trade.results.casual[player:get_player_name()] = {
trade_offer = trade_offer
npc.trade.results.single_trade_offer[player:get_player_name()] = {
trade_offer = trade_offer,
npc = self
}
-- Show formspec to player
minetest.show_formspec(player:get_player_name(), "advanced_npc:casual_trade", formspec)
minetest.show_formspec(player:get_player_name(), "advanced_npc:trade_offer", formspec)
end
function npc.trade.get_random_trade_status()
@ -114,32 +115,70 @@ function npc.trade.get_casual_trade_offer(self, offer_type)
}
end
function npc.trade.perform_trade(self, player_name, offer)
local item_stack = ItemStack(offer.item)
local price_stack = ItemStack(offer.price)
local inv = minetest.get_inventory({type = "player", name = player_name})
-- Check if offer is a buy or sell
if offer.offer_type == npc.trade.OFFER_BUY then
-- If NPC is buying from player, then player loses item, gets price
-- Check player has the item being buyed
if inv:contains_item("main", item_stack) then
-- Check if there is enough room to add the price item to player
if inv:room_for_item("main", price_stack) then
-- Remove item from player
inv:remove_item("main", item_stack)
-- Add item to NPC's inventory
npc.add_item_to_inventory_itemstring(self, offer.item)
-- Add price items to player
inv:add_item("main", price_stack)
-- Send message to player
minetest.chat_send_player(player_name, "Thank you!")
else
minetest.chat_send_player(player_name,
"Looks like you can't what I'm giving you for payment!")
end
else
minetest.chat_send_player(player_name, "Looks like you don't have what I want to buy...")
end
else
-- If NPC is selling to the player, then player gives price and gets
-- item, NPC loses item and gets price
-- Check NPC has the required item to pay
if inv:contains_item("main", price_stack) then
-- Check if there is enough room to add the item to player
if inv:room_for_item("main", item_stack) then
-- Remove item from player
inv:remove_item("main", price_stack)
-- Add item to NPC's inventory
npc.add_item_to_inventory_itemstring(self, offer.price)
-- Add price items to player
inv:add_item("main", item_stack)
-- Send message to player
minetest.chat_send_player(player_name, "Thank you!")
else
minetest.chat_send_player(player_name, "Looks like you can't carry anything else...")
end
else
minetest.chat_send_player(player_name, "Looks like you don't have what I'm asking for!")
end
end
end
-- Handler for chat formspec
minetest.register_on_player_receive_fields(function (player, formname, fields)
-- Additional checks for other forms should be handled here
-- Handle yes/no dialogue
if formname == "advanced_npc:casual_trade" then
if formname == "advanced_npc:trade_offer" then
local player_name = player:get_player_name()
if fields then
local player_response = npc.trade.results.casual[player_name]
local player_response = npc.trade.results.single_trade_offer[player_name]
if fields.yes_option then
-- Check if offer is a buy or sell
if player_response.trade_offer.offer_type == npc.trade.OFFER_BUY then
-- If NPC is buying from player, then player loses item, gets price
local inv = minetest.get_inventory({type = "player", name = player_name})
-- Check NPC has the item being buyed
if inv:contains_item("main", ItemStack(player_response.trade_offer.item)) then
-- Remove item from player
inv:remove_item("main", ItemStack(player_response.trade_offer.item))
-- TODO: Add to NPC
-- Add price items to player
inv:add_item("main", ItemStack(player_response.trade_offer.price))
end
else
end
npc.trade.perform_trade(player_response.npc, player_name, player_response.trade_offer)
elseif fields.no_option then
minetest.chat_send_player(player_name, "Talk to me if you change your mind!")
end