[Scar Script] Pre-built tech buildings / unlocks

function InstantTech_Init()
	InstantTech_SystemInit()
end

Scar_AddInit(InstantTech_Init)

function InstantTech_SystemInit()
	local instantTechConfig = {
		factions = {
			[0] = { -- Wehrmacht
				tiers = {
					[1] = {ebp = EBP.GERMAN.BEREICH_FESTUNG_MP},
					[2] = {ebp = EBP.GERMAN.DOLCH_AKTIONEN_MP, ubp = UPG.GERMAN.BATTLE_PHASE_2_MP},
					[3] = {ebp = EBP.GERMAN.HINTERE_PANZERWERK_MP, ubp = UPG.GERMAN.BATTLE_PHASE_3_MP},
					[4] = {ebp = EBP.GERMAN.SCHWERES_KRIEGSWERK_MP, ubp = UPG.GERMAN.BATTLE_PHASE_4_MP},
				},
			},
			[1] = { -- Soviet
				tiers = {
					[1] = {ebp = EBP.SOVIET.BARRACKS_MP},
					[2] = {ebp = EBP.SOVIET.WEAPON_SUPPORT_CENTER_MP},
					[3] = {ebp = EBP.SOVIET.MOTORPOOL_MP},
					[4] = {ebp = EBP.SOVIET.TANK_DEPOT_MP},
				},
			},
			[2] = { -- Oberkommando West
				tiers = {
					-- T1 for OKW is a bit different than for others because of T1 and T2 are pretty much the same. 
					-- If you set globalTechLevel to 1, OKW will get T1 OR T2 truck setup for free. If T1 is setup, T2 setup cost modifier will be removed.
					[1] = {ebp = EBP.WEST_GERMAN.HEAVY_ARMOR_SUPPORT_MP, additional_ebp = EBP.WEST_GERMAN.LIGHT_ARMOR_SUPPORT_MP},
					[2] = {ebp = EBP.WEST_GERMAN.LIGHT_ARMOR_SUPPORT_MP},
					[3] = {ebp = EBP.WEST_GERMAN.INFANTRY_SUPPORT_MP},
				},
			},
			[3] = { -- US Forces
				tiers = {
					[1] = {ubp = UPG.AEF.LIEUTENANT_DISPATCHED_UPGRADE_MP, sbp = SBP.AEF.LIEUTENANT_SQUAD_MP},
					[2] = {ubp = UPG.AEF.CAPTAIN_DISPATCHED_UPGRADE_MP, sbp = SBP.AEF.CAPTAIN_SQUAD_MP},
					[3] = {ubp = UPG.AEF.MAJOR_DISPATCHED_UPGRADE_MP, sbp = SBP.AEF.MAJOR_SQUAD_MP},
				},
			},
		},
	}


	--[[
		- For US Forces and Oberkommando West, 1 will be substracted from this value. 
			- For example globalTechLevel of 4 is 3 for US Forces and Oberkommando West.
			- You can adjust this in the config as well.
		- If setupTrucks is set to false, OKW will get the number of trucks matching the globalTechLevel, with the possible WFASubtract.
			- 
	--]]

	local instantTechConfigMap = {
		globalTechLevel = 3,
		WFASubtract = 1,
		setupTrucks = false,
		spawnOfficers = false,
		applyToHumans = true,
		applyToAis = true,
	}

	g_okw_truck_setup_modifier = {}

	g_resource_type_okw_truck_setup = {
		RT_Manpower, RT_Fuel,
	}

	eg_all_instant_tech = EGroup_CreateIfNotFound("eg_all_instant_tech")
	sg_all_instant_tech = SGroup_CreateIfNotFound("sg_all_instant_tech")

	Players_ForEeach(function(idx, pid, player)
		if (Player_IsHuman(player) and instantTechConfigMap.applyToHumans) or (not Player_IsHuman(player) and instantTechConfigMap.applyToAis) then
			local pos = Player_GetStartingPosition(player)
			local building_positions = InstantTech_GenerateBuildingPositions(pos)
			local race = Player_GetRaceIndex(player)
			if instantTechConfig.factions[race] then
				local config = instantTechConfig.factions[race]
				local _globalTechLevel = instantTechConfigMap.globalTechLevel
				if race == 2 then 
					_globalTechLevel = _globalTechLevel - instantTechConfigMap.WFASubtract 
					if _globalTechLevel < 1 then _globalTechLevel = 1 end
				end

				for key, tier in pairs(config.tiers) do
					if _globalTechLevel >= key then
						if tier.ebp then
							if race ~= 2 or instantTechConfigMap.setupTrucks then
								local spawn_pos = InstantTech_GetAvailableBuildingSpawnPosition(building_positions)
								local heading = Util_GetRandomPosition(pos, 30)
								local entity = Entity_CreateAndSpawnToward(tier.ebp, player, spawn_pos.pos, heading)
							elseif race == 2 and not instantTechConfigMap.setupTrucks then
								local spawn_pos = InstantTech_GetAvailableBuildingSpawnPosition(building_positions)
								local heading = Util_GetRandomPosition(pos, 30)
								local squad = Squad_CreateAndSpawnToward(SBP.WEST_GERMAN.SWS_HALFTRACK_SQUAD_MP, player, 1, spawn_pos.pos, heading)

								for key2, resource_type in ipairs(g_resource_type_okw_truck_setup) do
									local modifier = Modify_EntityCostExpanded(player, tier.ebp, resource_type,  0)
									table.insert(g_okw_truck_setup_modifier, {modifier = modifier, ebp = tier.ebp, player = player })

									if tier.additional_ebp then
										local modifier = Modify_EntityCostExpanded(player, tier.additional_ebp, resource_type,  0)
										table.insert(g_okw_truck_setup_modifier, {modifier = modifier, ebp = tier.ebp, player = player })
									end
								end

								local modifier = Modify_EntityBuildTime(player, tier.ebp, 0.15)
								table.insert(g_okw_truck_setup_modifier, {modifier = modifier, ebp = tier.ebp, player = player })
							end
						end
						if tier.ubp then
							Player_CompleteUpgrade(player, tier.ubp)
						end
						if tier.sbp and not instantTechConfigMap.spawnOfficers then
							SGroup_Clear(sg_all_instant_tech)
							Player_GetAll(player, sg_all_instant_tech)
							SGroup_Filter(sg_all_instant_tech, tier.sbp, FILTER_KEEP)
							SGroup_DestroyAllSquads(sg_all_instant_tech)
						end
					end
				end
			end
		end
	end)

	Rule_Add(InstantTech_MonitorOKWTrucks)
end

function InstantTech_MonitorOKWTrucks()
	for key, truck_modifier in ipairs(g_okw_truck_setup_modifier) do
		local player = truck_modifier.player
		EGroup_Clear(eg_all_instant_tech)
		Player_GetAll(player, eg_all_instant_tech)
		EGroup_Filter(eg_all_instant_tech, truck_modifier.ebp, FILTER_KEEP)

		EGroup_ForEach(eg_all_instant_tech, function(egid, idx, entity)
			Modifier_Remove(truck_modifier.modifier)
			table.remove(truck_modifier, key)
		end)
	end

	if table.getn(g_okw_truck_setup_modifier) == 0 then
		Rule_RemoveMe()
	end
end

function InstantTech_GenerateBuildingPositions(pos)
	local t_offsets = {OFFSET_FRONT, OFFSET_RIGHT, OFFSET_BACK, OFFSET_LEFT}
	local result = {}
	for key, offset in ipairs(t_offsets) do
		table.insert(result, {pos = Util_GetOffsetPosition(pos, offset, 15), used = false})
	end

	return result
end

function InstantTech_GetAvailableBuildingSpawnPosition(pos_list)
	for key, pos in ipairs(pos_list) do
		if not pos.used then
			pos.used = true
			return pos
		end
	end
	return World_Pos(0, 0, 0)
end

function Entity_CreateAndSpawnToward(ebp, player, pos, toward)
	local entity

	if player then
		entity = Entity_Create(ebp, player, pos, toward)
	else
		entity = Entity_CreateENV(ebp, pos, toward)
	end
	Entity_Spawn(entity)
	Entity_ForceConstruct(entity)
	return entity
end

function Players_ForEeach(f)
	for i = 1, World_GetPlayerCount() do
		local player = World_GetPlayerAt(i)
		f(Player_GetID(player), i, player)
	end
end

function Modify_EntityCostExpanded(playerid, blueprint, resource, addition, mathtype)
	local modifiertype = ""
	mathtype = mathtype or MUT_Multiplication

	if (resource == RT_Manpower) then
		modifiertype = "modifiers\\cost_manpower_modifier.lua"
	elseif (resource == RT_Munition) then
		modifiertype =  "modifiers\\cost_munition_modifier.lua"
	elseif (resource == RT_Fuel) then
		modifiertype =  "modifiers\\cost_fuel_modifier.lua"
	elseif (resource == RT_Action) then
		modifiertype =  "modifiers\\cost_action_modifier.lua"
	end

	local modifier = Modifier_Create(MAT_EntityType, modifiertype, mathtype, false, addition, blueprint)

	return {Modifier_ApplyToPlayer(modifier, playerid)}
end	

function Player_GetRaceIndex(player)
	local racename = Player_GetRaceName(player)

	if racename == "german" then
		return 0
	elseif racename == "soviet" then
		return 1
	elseif racename == "west_german" then
		return 2
	elseif racename == "aef" then
		return 3
	else
		return -1
	end
end

Configuration

local instantTechConfigMap = {
	globalTechLevel = 3,
	WFASubtract = 1,
	setupTrucks = false,
	spawnOfficers = false,
	applyToHumans = true,
	applyToAis = true,
}

Example screenshots: