SpawnerBuildFloor

-- Usage: place at Stone brick level, turtle facing against the wall (it will turn itself anyway)
-- Supply with stone Blocks,
-- Supply with dirt Blocks (cursed earth)

-- it will build a whole floor row for a level (inside pre-built walls! https://pastebin.com/vBszs7pe )


-- ItemSupply:
-- rows, starting with 1
stoneBlock = 1
dirtBlock = 2

spawnerHeight = 2

-- moves row to the first slow of the row
-- at least keep Target supply in slot
function moveSupplyRow(row, target)
    if not target then target = 16 end

    local start = (row-1)*4+2
    for i = start, (row)*4 do
        -- exit if enough items
        if turtle.getItemCount(start-1) >= target then break end

        turtle.select(i)
        turtle.transferTo(start-1)
    end
end

function row2slot(row)
    return (row-1)*4+1
end

function buildLevel()
    -- build complete row

    -- check if turtle is on the correct level
    turtle.select(row2slot(stoneBlock))

    local ok, blockFront = turtle.inspect()
    local blockSlot = turtle.getItemDetail(row2slot(stoneBlock))

    if ok and blockSlot then
        if blockFront["name"] == blockSlot["name"] then
            turtle.up() -- at dirt level

        elseif turtle.inspect() and select(2, turtle.inspect())["name"] == turtle.getItemDetail(row2slot(dirtBlock))["name"] then
            -- dont move up, we are already on the correct level
        else
            error("The block in front of me is not DIRT! That doesn't seem right!")
        end
    else
        error("I must be placed against Brick or Dirt Blocks! Also make sure to add building supplies")
    end
    -- END OF CHECK

    -- place stone
    if stoneEnabled then
        moveSupplyRow(stoneBlock)
        turtle.select(row2slot(stoneBlock))
        turtle.placeDown()
    end

    if dirtEnabled then
        moveSupplyRow(dirtBlock)
    end

    while turtle.back() do
        turtle.select(row2slot(dirtBlock))
        turtle.place()

        turtle.select(row2slot(stoneBlock))
        turtle.placeDown()
    end

    turtle.up()
    turtle.select(row2slot(dirtBlock))
    turtle.placeDown()

    -- face against wall
    turtle.turnRight(); turtle.turnRight()

    for i = 1, spawnerHeight do
        if not turtle.up() then
            error("Cannot move upwards!")
        end
    end
end

buildLevels = 17
stoneEnabled = true
dirtEnabled = true

print("How many levels to build? Default: ".. tostring(buildLevels))
buildLevels = tonumber(io.read()) or buildLevels
print("--> ".. tostring(buildLevels) .. " levels")


-- turn Around, it must be placed against a wall
if not turtle.detect() then
    turtle.turnRight(); turtle.turnRight()
end

for n = 1, buildLevels do
    buildLevel()
end