saveArea

local ccCoord = {}
ccCoord["x"], ccCoord["y"], ccCoord["z"] = commands.getBlockPosition()
local blockData = {}
local facing = ""
local fx = 0
local fz = 0
local swapxz = false

function getFacing()
    local directions = {"unknown", "north", "south", "west", "east"}
    local blockInfo = commands.getBlockInfo( commands.getBlockPosition() )
    print( "My facing is ", directions[ blockInfo.metadata ], "." )
    facing = directions[ blockInfo.metadata ]
    --print(facing)
end

function setModifiers()
    if facing == "west" then
        fx = 1
        fz = 1
        swapxz = true
    elseif facing == "east" then
        fx = -1
        fz = -1
        swapxz = true
    elseif facing == "north" then
        fx = -1
        fz = 1
        swapxz = false
    elseif facing == "south" then
        fx = 1
        fz = -1
        swapxz = false
    end
end


function saveBlock(x,y,z)
    local data = commands.getBlockInfo(x,y,z)
    if not blockData[x] then
        blockData[x] = {}
    end
    if not blockData[x][y] then
        blockData[x][y] = {}
    end
    if not blockData[x][y][z] then
        blockData[x][y][z] = {}
    end
    blockData[x][y][z]["name"] = data["name"]
    blockData[x][y][z]["metadata"] = data["metadata"]
end

function writeBlocks()
    file = io.open("blocks", "w")
    file:write(textutils.serialize(blockData))
    file:close()
end

function saveSpace(xStart, xEnd, yStart, yEnd, zStart, zEnd)
    --print(xStart..xEnd..yStart..yEnd..zStart..zEnd)
    for x = xStart, xEnd,fx do
        for y = yStart, yEnd do
            for z = zStart, zEnd,fz do
                saveBlock(x,y,z)
            end
        end
    end
    writeBlocks()
end

function relXYZnoswap(x,y,z)
    --print("NoSwap: "..ccCoord["x"]+(x+1)*fx..":"..ccCoord["y"]+(y)..":"..ccCoord["z"]+(z+1)*fz)
    return ccCoord["x"]+(x+1)*fx, ccCoord["y"]+(y), ccCoord["z"]+(z+1)*fz
end

function relXYZ(x,y,z)
    if not swapxz then
        return ccCoord["x"]+(x+1)*fx, ccCoord["y"]+(y), ccCoord["z"]+(z+1)*fz
    else
        return ccCoord["x"]+(z+1)*fz, ccCoord["y"]+(y), ccCoord["z"]+(x+1)*fx
    end
end

function saveBoardArea()
    print("Saving board area, this may take a moment....")
    local x,y,z,x2,y2,z2
    x,y,z = relXYZnoswap(0,-1,0)
    x2,y2,z2 = relXYZnoswap(9,5,9)
    print("Save: "..x..":"..x2..", "..y..":"..y2..", "..z..":"..z2)
    saveSpace(x,x2,y,y2,z,z2)
    print("Saving board area complete.")
end

getFacing()
setModifiers()
saveBoardArea()