StendhalScripting/Lua: Difference between revisions

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==== Adding Merchant Behavior ====

Merchant behavior ''(buying/selling)'' can be set with one of the following helper functions:

* ''npcHelper:addMerchant(merchantType, npc, prices, addOffer)''

* ''npcHelper:addBuyer(npc, prices, addOffer)''

* ''npcHelper:addSeller(npc, prices, addOffer)''

** Arguments:

*** ''merchantType:'' (string) If set to "buyer", will add buyer behavior, otherwise will be "seller" (may change type to boolean in future).

*** ''npc:'' (SpeakerNPC) The NPC to add the behavior to.

*** ''prices:'' (Map<String, Integer> or LuaTable) List of items & their prices.

*** ''addOffer:'' (boolean) If <code>true</code>, will add default replies for "offer".

Example of adding seller behavior to an NPC:

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if game:setZone("0_semos_city") then

local frank = npcHelper.createSpeakerNPC("Frank")

npcHelper:addSeller(frank, shops:get("shopname"), true)

game:add(frank)

end

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To create a custom shop list, you can use a Lua table (there are multiple ways to add elements to a Lua table):

Method 1:

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local priceList = {

meat = 50,

["ham"] = 70,

}

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Method 2:

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local priceList = {}

priceList.meat = 50

priceList["ham"] = 70

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The helper methods have special handling for underscore characters as well (the following are all the same):

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local priceList = {

smoked_ham = 100,

["smoked ham"] = 100,

}

priceList.smoked_ham = 100

priceList["smoked ham"] = 100

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Then add the seller behavior using the custom list:

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npcHelper:addSeller(frank, priceList, true)