control

local controlChest = peripheral.wrap("front")

-- variable for mining lenght
local time = 0
local number = true


-- The following function rounds a number to the given number of decimal places.
function round(num, idp)
  local mult = 10^(idp or 0)
  return math.floor(num * mult + 0.5) / mult
end

-- how long to mine
print("How long time would you like to mine in minutes:")
time = assert(tonumber(read()),"input is not a number")
print("To abort the operation")
print("hold ENTER")


--if number == false then
--  return
--else
-- calculate the time to seconds
  time = time * 60
--end

-- put an item in the chest
-- and sleep for selected time
turtle.select(1)
turtle.drop()


local on = true
local interval = 0.5
local timer = os.startTimer(0)

while time > 0 do
    --sleep(1)




    -- if we want the miner to quit early then press enter
    -- this part of the code is from billysback
    local event, p1, p2, p3 = os.pullEvent()
    if event == "timer" then
        --Update program

        sleep(0.5)
        -- print the time left, but only the whole minutes
        -- and only once a minute
        -- if time is evenly divided by 60 (that is woth no riminder)
        if (time % 60) == 0 then
            print("Time left: " ..math.floor(time/60).. " minutes")
        end
        --print("Time left: " ..time.. " ticks")
        time = time  - 1

        timer = os.startTimer(interval)
    else
        local key = p1
        if key == 28 then --enter
            on = false
            break
        end
    end




--[[
    sleep(1)
    -- print the time left, but only the whole minutes
    -- and only once a minute
    -- if time is evenly divided by 60 (that is woth no riminder)
    if (time % 60) == 0 then
        print("Time left: " ..math.floor(time/60).. " minutes")
    end
    --print("Time left: " ..time.. " ticks")
    time = time  - 1

]]
end

-- put it back into the turtle to end the mining session
controlChest.pushItem("south",1,64,1)

-- print that it's done
print("DONE!")