Mine 2.0

local robot = require("robot")
local computer = require("computer")
local component = require("component")
local sides = require("sides")
local os = require("os")

function moveGeneric(move, detect, swing)
    if detect() then swing() end
    if not move() then computer.shutdown() end
end

function moveForward()
    moveGeneric(robot.forward, robot.detect, robot.swing)
end

function moveUp()
    moveGeneric(robot.up, robot.detectUp, robot.swingUp)
end

function moveDown()
    moveGeneric(robot.down, robot.detectDown, robot.swingDown)
end

function shouldMine(side)
    local info = component.geolyzer.analyze(side)
    return info and info.name and (info.name:match(".*[oO]re.*") or info.name:match("blockMisc") or info.name:match("resource"))
end

function faceDirection(side)
    while side ~= component.navigation.getFacing() do
        robot.turnLeft()
    end
end

function scanDig()
    if robot.detectUp() and shouldMine(sides.top) then
        moveUp()
        scanDig()
        moveDown()
    end
    if robot.detectDown() and shouldMine(sides.bottom) then
        moveDown()
        scanDig()
        moveUp()
    end
    for i=2,5,1 do
        if shouldMine(i) then
            if i == sides.right then robot.turnRight()
            elseif i == sides.left then robot.turnLeft()
            elseif i == sides.back then robot.turnAround()
            end

            moveForward()
            scanDig()
            robot.back()

            if i == sides.right then robot.turnLeft()
            elseif i == sides.left then robot.turnRight()
            elseif i == sides.back then robot.turnAround()
            end
        end
    end
end

function placeCobble()
    if not robot.detectDown() then
        robot.select(2)
        robot.placeDown()
    end
end

function mineTunnel()
    local distance = 120
    for ix=1,distance/2,1 do
        scanDig()
        placeCobble()
        moveUp()
        scanDig()
        moveForward()
        scanDig()
        moveDown()
        scanDig()
        if ix % 4 == 0 then
            robot.select(1)
            if not robot.placeUp(sides.right) then
                robot.placeUp(sides.left)
            end
        end
        placeCobble()
        moveForward()
    end

    robot.turnAround()
    for i=1,distance,1 do
        moveForward()
    end
end

local branchDistance = 36

function mineBranch()
    print("Mining Branch")
    print(branchDistance)
    faceDirection(sides.south)
    for i=1,branchDistance,1 do
        moveForward()
    end
    faceDirection(sides.east)
    mineTunnel()
    faceDirection(sides.north)
    for i=1,branchDistance,1 do
        moveForward()
    end
    if component.geolyzer.analyze(sides.front).name:match("Chest") then
        for i=3,robot.inventorySize(),1 do
            robot.select(i)
            robot.drop()
        end
    else
        print("No chest to drop items.")
    end
end

mineBranch()

while (computer.energy() + 500 < computer.maxEnergy()) do
    os.sleep(500)
end

branchDistance = 42
mineBranch()


local x = 657
local y = 11
local z = -992

computer.shutdown()