NPCs: Now spawn with 1 or 2 items from the favorite items list.

Trade: Added dialogues for buys and sells for casual trading.
Dialogues: Added a 30% chance for NPC to make a trade offer.
Trade: Trade offers WIP.

trade/trade.lua

@@ -6,6 +6,42 @@ npc.trade.CASUAL = "casual"
 npc.trade.TRADER = "trader"
 npc.trade.NONE = "none"
 
+npc.trade.OFFER_BUY = "buy"
+npc.trade.OFFER_SELL = "sell"
+
+-- Casual trader NPC dialogues definition
+-- Casual buyer
+npc.trade.CASUAL_TRADE_BUY_DIALOGUE = {
+  text = "I'm looking to buy some items, are you interested?",
+  casual_trade_type = npc.trade.OFFER_BUY,
+  responses = {
+    [1] = {
+      text = "Yes, let's see what are you looking for",
+      action_type = "function",
+      response_id = 1,
+      action = function(self, player)
+        
+      end
+    }
+  }
+}
+
+-- Casual seller
+npc.trade.CASUAL_TRADE_SELL_DIALOGUE = {
+  text = "I have some items to sell, are you interested?",
+  casual_trade_type = npc.trade.OFFER_SELL,
+  responses = {
+    [1] = {
+      text = "Yes, let's see what you have",
+      action_type = "function",
+      response_id = 1,
+      action = function(self, player)
+        
+      end
+    }
+  }
+}
+
 function npc.trade.get_random_trade_status()
 	local chance = math.random(1,10)
 
@@ -19,4 +55,20 @@ function npc.trade.get_random_trade_status()
     -- Trader by profession
     return npc.trade.TRADER
 	end
+end
+
+-- This function will return an offer object, based
+-- on the items the NPC has.
+-- Criteria: If having a near empty inventory, (< 6) NPC
+-- will offer to buy with a 70% chance.
+-- If NPC has a near full inventory  (> 10 items), NPC
+-- will offer to sell. The prices will be selected using:
+-- item_price * (+/- price_item * 0.2) so item will be
+-- more or less 20% of the item price.
+function npc.trade.get_casual_trade_offer(self)
+  return {
+            offer_type = npc.trade.OFFER_BUY, 
+            item = "default:wooden_planks 10", 
+            price = "default:iron_lump 20"
+         }
 end