Custom script for oUF_NeavRaid that automatically positions and scales the raid frames based on spec and size of the raid

custom.lua

--[[
Slash command usage:
	/raidscale 1.2
	/raidscale reset
	/rs 1.2
	/rs reset
]]--

--[ CONFIG ]--

local healerPosition = {'LEFT', UIParent, 'CENTER', 200, 0}
local dpsPosition = {'RIGHT', UIParent, 'RIGHT', -350, 0}

local scaleThreshold = 28 -- Number of players needed to change the raid scale
local largeRaidScale = 0.95 -- Scale

--[ ENDCONFIG ]--

if IsAddOnLoaded('Aptechka') then return end

local _, ns = ...
local config = ns.Config

local userSetScale = false  -- Don't do automatic scaling if the user set a custom value by slash command

local function MoveRaidFrames(point, parent, parentPoint, xOffset, yOffset)
	for i = 1, config.units.raid.layout.numGroups do
		_G['oUF_Neav_Raid'..i]:ClearAllPoints()
		if (i == 1) then
			_G['oUF_Neav_Raid'..i]:SetPoint(point, parent, parentPoint, xOffset, yOffset)
		else
			_G['oUF_Neav_Raid'..i]:SetPoint('TOPLEFT', 'oUF_Neav_Raid'..i-1, 'TOPRIGHT', 7, 0)
		end
	end
end

local function ScaleRaidFrames(scale)
	scale = tonumber(scale)
	scale = math.abs(scale)

	-- Scaling the raid frames causes taint/errors during combat
	if InCombatLockdown() or UnitAffectingCombat('player') or UnitAffectingCombat('pet') then
		return
	end

	if scale then
		for i = 1, config.units.raid.layout.numGroups do
			_G['oUF_Neav_Raid'..i]:SetScale(scale)
		end
	end
end

local function IsHealer()
	return GetSpecialization() and GetSpecializationRole(GetSpecialization()) == 'HEALER'
end

local f = CreateFrame('Frame')
f:RegisterEvent('PLAYER_ENTERING_WORLD')

local function OnEvent(self, event, ...)
	if event == 'PLAYER_ENTERING_WORLD' then
		self:UnregisterEvent('PLAYER_ENTERING_WORLD')
		
		self:RegisterEvent('ACTIVE_TALENT_GROUP_CHANGED')
		self:RegisterEvent('GROUP_ROSTER_UPDATE')
	end

	if event == 'ACTIVE_TALENT_GROUP_CHANGED' or event == 'PLAYER_ENTERING_WORLD' then
		if IsHealer() then
			MoveRaidFrames(unpack(healerPosition))
		else
			MoveRaidFrames(unpack(dpsPosition))
		end
	end

	if event == 'GROUP_ROSTER_UPDATE' and not userSetScale then
		if GetNumGroupMembers() >= scaleThreshold then
			ScaleRaidFrames(largeRaidScale)
		else
			ScaleRaidFrames(config.units.raid.scale)
		end
	end
end
f:SetScript('OnEvent', OnEvent)

	-- SLASH COMMANDS

SlashCmdList['RAIDSCALE'] = function(scale)
	if InCombatLockdown() or UnitAffectingCombat('player') or UnitAffectingCombat('pet') then
		return
	end

	if scale == 'reset' then
		ScaleRaidFrames(config.units.raid.scale)
		userSetScale = false
		return
	end

	if tonumber(scale) then
		ScaleRaidFrames(scale)
		userSetScale = true
	else
		DEFAULT_CHAT_FRAME:AddMessage('Usage: "/raidscale 1.2" or "/raidscale reset"', 255, 0, 0)
	end
end

SLASH_RAIDSCALE1 = '/raidscale'
SLASH_RAIDSCALE2 = '/rs'