Raiu API v1.2

--v1.2
-- If my vein miner program doesn't exist, it will be automatically downloaded.
if not fs.exists("VeinMiner.lua") then
    shell.run("pastebin","get","0C6LyNES","VeinMiner.lua")
end
require("VeinMiner")

function refuel()
    -- Tries to refuel if fuel level is low.
    while turtle.getFuelLevel() == 0 do
        for a = 1, 16 do
            turtle.select(a)
            turtle.refuel(1)
        end
    end
end

move = {
    forward = function(x)
        -- Tries to travel forward. May be blocked by entities.
        -- Input x for distance to travel, or nothing to travel 1 only one block.
        if not x then x = 1 end
        for a = 1, x do
            repeat
                refuel()
                turtle.dig()
            until turtle.forward()
        end
    end,

    back = function(x)
        -- Tries to travel backward. May be blocked by entities or blocks.
        -- Input x for distance to travel, or nothing to travel 1 only one block.
        if not x then x = 1 end
        for a = 1, x do
            repeat
                refuel()
            until turtle.back()
        end
    end,

    up = function(x)
        -- Tries to travel upward. May be blocked by entities.
        -- Input x for distance to travel, or nothing to travel 1 only one block.
        if not x then x = 1 end
        for a = 1, x do
            repeat
                refuel()
                turtle.digUp()
            until turtle.up()
        end
    end,

    down = function(x)
        -- Tries to travel downward. May be blocked by entities.
        -- Input x for distance to travel, or nothing to travel 1 only one block.
        if not x then x = 1 end
        for a = 1, x do
            repeat
                refuel()
                turtle.digDown()
            until turtle.down()
        end
    end,

    left = function(x)
        -- Turns left.
        -- Input x for how many times to turn, or nothing to turn once.
        if not x then x = 1 end
        for a = 1, x do
            turtle.turnLeft()
        end
    end,

    right = function(x)
        -- Turns right.
        -- Input x for how many times to turn, or nothing to turn once.
        if not x then x = 1 end
        for a = 1, x do
            turtle.turnRight()
        end
    end
}

function hallway(y, x, veinMiner)
    -- Creates a 2 or 3 block tall hallway by digging one block above, below, and in front.
    -- Input x for distance to travel, or nothing to travel 1 only one block.
    -- Input y for hallway height. -1 = dig below. 1 = dig above. 0 = dig above and below.
    if not x then x = 1 end
    for a = 1, x do
        move.forward()
        if veinMiner then
            shell.run("VeinMiner.lua")
        end
        if y >= 0 then
            turtle.digUp()
        end
        if y <= 0 then
            turtle.digDown()
        end
    end
end

function place(dir, block, damage, sign)
    -- Searches for specified item in inventory and tries to place it in the world.
    -- Input dir for which direction to place the block.
    -- Input block for the item ID. Input damage for the item variant (i.e.: 0 = Stone, 1 = Granite, etc.).
    -- Input sign for the text to display on a sign. Leave blank for no text.
    local placeBlock = 0

    if not sign then sign = "" end
    repeat
        for a = 1, 16 do
            local item = turtle.getItemDetail(a)
            if item and item.name == block and item.damage == damage then
                placeBlock = a
            end
        end
    until placeBlock > 0
    turtle.select(placeBlock)
    if dir == "forward" then
        turtle.dig()
        turtle.place(sign)
    elseif dir == "up" then
        turtle.digUp()
        turtle.placeUp(sign)
    elseif dir == "down" then
        turtle.digDown()
        turtle.placeDown(sign)
    end
end

-- 6/20/2022 - v1.2
-- All movement functions are now parts of one object. i.e., use move.forward to run the forward function().
-- VeinMiner.lua is now loaded with require().

-- 8/31/2021 - v1.1
-- Fixed refuel function not checking fuel level correctly.
-- Added code to automatically download my Vein Miner program found at: https://pastebin.com/0C6LyNES