Add 3pT2BS.

3pT2BS/3pT2BS.lua

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+ThreepT2BS = {}
+ThreepT2BS.title = GetAddOnMetadata("3pT2BS", "Title")
+ThreepT2BS.version = GetAddOnMetadata("3pT2BS", "Version")
+ThreepT2BS.author = GetAddOnMetadata("3pT2BS", "Author")
+print(("Loaded %s v%s by %s."):format(ThreepT2BS.title, ThreepT2BS.version, ThreepT2BS.author))
+
+local lastT2BattleShout = 0
+local actionMacros = {}
+
+
+local function hasRecentlyBattleShouted()
+    return lastT2BattleShout + ThreepT2BSDB.battleShoutPausePeriod > GetTime()
+end
+
+
+local function has3pT2()
+    return GetNumSetItemsEquipped(ThreepT2BSDB.wrathSetId) >= 3
+end
+
+
+local function hasEnoughRageForBattleShout()
+    return UnitPower("player") >= GetSpellPowerCost("Battle Shout")[1].cost
+end
+
+
+local function isBloodRageReady()
+    local start, duration, enabled, modRate = GetSpellCooldown("Bloodrage")
+    return start == 0 and duration == 0
+end
+
+
+
+local button = CreateFrame("Button", "3pT2BS", UIParent, "SecureActionButtonTemplate")
+button:SetAttribute("type", "macro")
+button:SetAttribute("macrotext", wrathOff)
+button:SetScript("PreClick", function (self, button, down)
+    if InCombatLockdown() then
+        return
+    end
+    if hasRecentlyBattleShouted() then
+        return self:SetAttribute("macrotext", actionMacros.takeWrathOff)
+    end
+    if not hasEnoughRageForBattleShout() then
+        if isBloodRageReady() then
+            return self:SetAttribute("macrotext", actionMacros.putWrathOn .. actionMacros.castBloodRage)
+        end
+        return self:SetAttribute("macrotext", actionMacros.takeWrathOff)
+    end
+    if not has3pT2() then
+        return self:SetAttribute("macrotext", actionMacros.putWrathOn)
+    end
+    return self:SetAttribute("macrotext", actionMacros.castBattleShout)
+end)
+
+
+
+local frame, events = CreateFrame("FRAME"), {};
+
+function events:COMBAT_LOG_EVENT_UNFILTERED()
+    local _, event, _, _, name, _, _, _, _, _, _, _, spellName = CombatLogGetCurrentEventInfo()
+    if spellName == "Battle Shout" and event == "SPELL_CAST_SUCCESS" and name == UnitName("player") and has3pT2() then
+        lastT2BattleShout = GetTime()
+    end
+end
+
+
+function events:ADDON_LOADED()
+    ThreepT2BSDB = ThreepT2BSDB or {
+        ["battleShoutPausePeriod"] = 10,
+        ["wrathSetId"] = 218,
+        ["actions"] = {
+            -- we always stop if in combat, since that means we might not have had a chance to set the correct macrotext
+            ["castBloodRage"] = {
+                "/stopmacro [combat]",
+                "/cast Bloodrage",
+            },
+            ["putWrathOn"] = {
+                "/cancelaura Bloodrage",
+                "/stopmacro [combat]",
+                "/eq Helm of Wrath",
+                "#/eq Pauldrons of Wrath",
+                "#/eq Breastplate of Wrath",
+                "#/eq Bracelets of Wrath",
+                "#/eq Gauntlets of Wrath",
+                "/eq Waistband of Wrath",
+                "#/eq Legplates of Wrath",
+                "/eq Sabatons of Wrath",
+            },
+            ["castBattleShout"] = {
+                "/cancelaura Bloodrage",
+                "/stopmacro [combat]",
+                "/cast Battle Shout",
+            },
+            ["takeWrathOff"] = {
+                "/cancelaura Bloodrage",
+                "/stopmacro [combat]",
+                "/eq Lionheart Helm",
+                "/eq Onslaught Girdle",
+                "/eq Chromatic Boots",
+            },
+        },
+    }
+    for action, lines in pairs(ThreepT2BSDB.actions) do
+        actionMacros[action] = table.concat(lines, "\n")
+    end
+end
+
+
+frame:SetScript("OnEvent", function(self, event, ...)
+    events[event](...)
+end)
+for k, v in pairs(events) do
+    frame:RegisterEvent(k) -- register all events for which handlers have been defined
+end

3pT2BS/3pT2BS.toc

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+## Interface: 11305
+
+## Title: 3pT2BS
+## Notes: Automatically switch to 3/8 Wrath Tier 2, cast Battle Shout, and then switch back to normal gear.
+## Author: Caspervk
+## Version: 0.0.1
+
+## X-License: GNU General Public License v3 or later (GPLv3+)
+
+##SavedVariablesPerCharacter: ThreepT2BSDB
+
+util.lua
+3pT2BS.lua

3pT2BS/README.md

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+# 3pT2BS
+World of Warcraft Classic AddOn for Fury Warriors to automatically switch to 3/8 Wrath Tier 2, cast Battle Shout, and
+then switch back to normal gear with the press of one button.
+Use `/click 3pT2BS` in a macro to keybind.
+
+Gear-sets needs to be modified in `WTF/Account/x/y/z/SavedVariables/3pT2BS.lua` after first run.

3pT2BS/util.lua

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+
+function GetNumSetItemsEquipped(setID)
+    -- From WeakAuras.GetNumSetItemsEquipped
+    -- https://github.com/WeakAuras/WeakAuras2/blob/master/WeakAuras/Prototypes.lua#L969
+    if not setID or not type(setID) == "number" then return end
+    local equipped = 0
+    local setName = GetItemSetInfo(setID)
+    for i = 1, 18 do
+        local item = GetInventoryItemID("player", i)
+        if item and select(16, GetItemInfo(item)) == setID then
+            equipped = equipped + 1
+        end
+    end
+    return equipped, 18, setName
+end