Add [equipset]/[noequipset] conditionals for equipment sets

Checks whether a saved ClassicAPI equipment set is currently equipped, via
C_EquipmentSet.GetEquipmentSetInfo's isEquipped flag (wrapped as
ClassicAPI.IsEquipmentSetEquipped). Named [equipset] rather than [set] to avoid
colliding with the existing tier/item-set piece-count conditional. Supports
OR-lists ([equipset:Raid/Farm]) and negation ([noequipset:PvP]). Pairs with the
conditional /equipset command: swap with one, branch on the other.

ClassicAPI.lua

@@ -155,6 +155,25 @@ function API.GetItemSetInfo(setID)
     return C_Item.GetItemSetInfo(setID)
 end
 
+--------------------------------------------------------------------------------
+-- Equipment Set
+--------------------------------------------------------------------------------
+
+-- True if the saved equipment set named `name` is currently equipped -- every
+-- resolvable item in its target slot (a missing bank-stored piece doesn't
+-- disqualify, matching C_EquipmentSet.GetEquipmentSetInfo's isEquipped). Name is
+-- an exact, case-sensitive match per GetEquipmentSetID. Returns false for an
+-- unknown name or a client without the EquipmentSet API. Powers [equipset]/
+-- [noequipset]; the swap side is the reclaimed /equipset command.
+function API.IsEquipmentSetEquipped(name)
+    if not name or name == "" then return false end
+    if type(C_EquipmentSet) ~= "table" then return false end
+    local setID = C_EquipmentSet.GetEquipmentSetID(name)
+    if not setID then return false end
+    local _, _, _, isEquipped = C_EquipmentSet.GetEquipmentSetInfo(setID)
+    return isEquipped and true or false
+end
+
 --------------------------------------------------------------------------------
 -- Spell
 --------------------------------------------------------------------------------

Conditionals.lua

@@ -5836,6 +5836,26 @@ CleveRoids.Keywords = {
         end, conditionals, "noset")
     end,
 
+    -- [equipset:Name] — true if the saved equipment set "Name" is currently
+    -- equipped (ClassicAPI equipment manager, distinct from [set] tier pieces).
+    -- [equipset:Raid/PvP] = either set equipped. Names are case-sensitive; use _
+    -- for spaces, e.g. [equipset:My_Raid_Set].
+    equipset = function(conditionals)
+        return Multi(conditionals.equipset, function(v)
+            local name = (type(v) == "table") and v.name or v
+            return CleveRoids.ClassicAPI.IsEquipmentSetEquipped(name)
+        end, conditionals, "equipset")
+    end,
+
+    -- [noequipset:Name] — true if that equipment set is NOT currently equipped.
+    -- [noequipset:Raid/PvP] = neither equipped (De Morgan's).
+    noequipset = function(conditionals)
+        return NegatedMulti(conditionals.noequipset, function(v)
+            local name = (type(v) == "table") and v.name or v
+            return not CleveRoids.ClassicAPI.IsEquipmentSetEquipped(name)
+        end, conditionals, "noequipset")
+    end,
+
     -- [inbag:Item] — true if item exists in bags or equipped
     -- [inbag:Item<12] — true if bag count of Item is less than 12
     -- Supports multi-value: [inbag:Item1/Item2 inbag:Item3] = (Item1 OR Item2) AND Item3