-- Created by Jef Roosens
--
-- Utilities to ease movement using a turtle


local dig = require("jlib.mine").dig
local module = {}
module.logger = require("jlib.log").Logger:new{level = -1}


-- Safely move n blocks. This means accounting for gravel, trees growing...
--
-- @param dir direction to move (u, d, f)
-- @param n number of blocks to move. If nil (or not supplied), 1 is taken as
-- @param side_effect a function/table of functions which gets called after the
-- turtle has moved 1 block. This can be used to extend the functionality of
-- the function without having to re-write it.
function module.move(dir, n, side_effect)
    -- Default value
    n = n or 1

    local funcs = {
        u = turtle.up,
        d = turtle.down,
        f = turtle.forward
    }

    for _ = 1, n do
        dig(dir)
        funcs[dir]()

        -- Run the side-effect if given
        if side_effect then
            if type(side_effect) == "table" then
                for _, f in pairs(side_effect) do
                    f()
                end

            else
                side_effect()

            end
        end
    end

    module.logger:info("Moved " .. n .. " blocks")
end


return module