Fix cooldown display for overridden spells

When a spell is overridden by another, our cooldown bar stops being able to track it. Normally this is fine if the spell completely changes as you probably don't expect a cd bar for Backstab to track Gloomblade.

But when the overridden spell shares the same name as the base spell, such as Fire Breath for Evokers with the Font of Magic talent, you very much would expect the bar to track both.

With this fix, tracking the base spell will show the cd for the overridden version as well.

changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+v1.15.7:
+
+- Fix cooldown display for overridden spells (such as Evoker spells where Font of Magic replaces the base spell with an override with the same name).
+
 v1.15.6:
 
 - Package new version of LibDogTag-Unit to fix an error with some units on 11.0.2

modules/CustomCDBar.lua

@@ -36,7 +36,7 @@ if not GetSpellInfo and C_Spell and C_Spell.GetSpellInfo then
 
 		local info = C_Spell.GetSpellInfo(id)
 		if info then
-			return info.name, nil, info.iconID
+			return info.name, nil, info.iconID, info.spellID
 		end
 	end
 end
@@ -636,8 +636,18 @@ end
 
 -- 'Protected' methods --------------------------------------------------------
 
+function IceCustomCDBar.prototype:GetCooldownDurationOverride(spellID)
+	if spellID and FindSpellOverrideByID then
+		local override = FindSpellOverrideByID(spellID)
+		if override and override ~= spellID then
+			return self:GetCooldownDuration(override)
+		end
+	end
+end
+
 function IceCustomCDBar.prototype:GetCooldownDuration(buffName)
-	buffName = self:GetSpellNameOrId(buffName)
+	local spellID
+	buffName, spellID = self:GetSpellNameOrId(buffName)
 
 	local now = GetTime()
 	local localRemaining = nil
@@ -646,7 +656,7 @@ function IceCustomCDBar.prototype:GetCooldownDuration(buffName)
 	if hasCooldown then
 		-- the item has a potential cooldown
 		if localDuration <= 1.5 then
-			return nil, nil
+			return self:GetCooldownDurationOverride(spellID)
 		end
 
 		localRemaining = localDuration + (localStart - now)
@@ -657,7 +667,7 @@ function IceCustomCDBar.prototype:GetCooldownDuration(buffName)
 
 		return localDuration, localRemaining
 	else
-		return nil, nil
+		return self:GetCooldownDurationOverride(spellID)
 	end
 end
 
@@ -868,7 +878,8 @@ function IceCustomCDBar.prototype:IsReady()
 end
 
 function IceCustomCDBar.prototype:GetSpellNameOrId(spellName)
-	return spellName
+	local id = select(4, GetSpellInfo(spellName))
+	return spellName, id
 end
 
 function IceCustomCDBar.prototype:Show(bShouldShow, bForceHide)

this_version.md

@@ -1,5 +1,9 @@
 # Changelog
 
+v1.15.7:
+
+- Fix cooldown display for overridden spells (such as Evoker spells where Font of Magic replaces the base spell with an override with the same name).
+
 v1.15.6:
 
 - Package new version of LibDogTag-Unit to fix an error with some units on 11.0.2