Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

Chapter 21 ■ Responding to the Combat Log and Threat Information 405Updating Pet MappingsThe strategy you’re going to take with pets is to map the pet GUID to theowner GUID, so multiple pets get collapsed into a single amount of damage.Add the following function that will take a unitID and update the GUID mapfor that unit’s pets:function CombatStatus:UpdatePets(unit)local petUnitif unit == “player“ thenpetUnit = “pet“elsepetUnit = unit:gsub(“(party)(%d)“, “%1pet%2“)endif petUnit and UnitExists(petUnit) thenlocal guid = UnitGUID(unit)local petGUID = UnitGUID(petUnit)self.pet_guids[petGUID] = guid .. “pet“endendTo look up information about pets you need to use the unitID for the pet,but you’re only given the unitID for the owner. For party members these IDsare partypet1, partypet2, partypet3, andpartypet4. Youcanuseasimplesubstitution using patterns to transform party1 into partypet1, asshowninthe preceding code.You need to cover the special case of the player’s pet, which is just theunitID ‘‘pet.’’ Once you have the correct unitID, you check to see if the unitexists and if so you get the GUID. Rather than doing a direct mapping fromthe pet GUID to the owner GUID, you do a mapping from the pet GUID to theowner GUID with the string ‘‘pet’’ added to the end.If you didn’t add this string you would need to store the pet’s damage inanother table (because the damage table is indexed by GUID). Otherwise, youwouldnolongerbeabletodistinguishbetweenthepetsandtheoriginalunititself.Storing Damage and Healing InformationYou’re using the COMBAT_LOG_EVENT_UNFILTERED to get information about yourparty’s damage and healing, so you need a function that extracts the rightinformation from the various possible events. Create the following function inCombatStatus.lua:local damageEvents = {SWING_DAMAGE = true,