OpenComputers Robot block miner

local robot = require("robot")
local sides = require("sides")
local component = require("component")
local inventoryController = component.getPrimary("inventory_controller")

-- Gets the tool from the chest.
local function GetTool()
    robot.select(2)

    -- Get the first tool in the tool chest.
    local foundTool = false
    robot.turnLeft()
    for chestSlot = 1, inventoryController.getInventorySize(sides.front) do
        if inventoryController.suckFromSlot(sides.front, chestSlot) then
            foundTool = true
            break
        end
    end
    robot.turnRight()

    -- Equip the tool.
    inventoryController.equip()

    -- Reselect the first slot, containing the cobblestone or stone blocks.
    robot.select(1)

    return foundTool
end

-- Checks for a tool and if none exists then get tool from the chest
local function CheckForTool()
    -- Check if a tool is equipped and if not then get the tool from the chest.
    if robot.durability() == nil then
        return GetTool()
    end
    return true
end

-- Checks if we can fill the chest with the block.
local function AttemptToFillChest()
    if robot.count(1) > 0 then
        local success = false
        robot.turnAround()
        for chestSlot = 1, inventoryController.getInventorySize(sides.front) do
            if inventoryController.dropIntoSlot(sides.front, chestSlot) then
                success = true
                break
            end
        end
        robot.turnAround()
        return success
    end
    return true
end

while true do
    -- Check if the first slot is full and if so then put the items in the block chest.
    if AttemptToFillChest() then
        -- Make sure the tool is equipped, and if so then
        if CheckForTool() then
            robot.swing()
        end
    end


    -- Sleep
    os.sleep(.1)
end