Lua

Wand-of-equal-Trade.lua

require "https://gist.github.com/mkarneim/8deed890e0d92ef19506e889819b2e97"

-- Wand of equal Trade
function woet()
  print("Starting Wand of equal Trade")

  click = cursor.registerForEvents("RIGHT_CLICK", "LEFT_CLICK")
  for event in click.next do
    if event.item ~= nil
    and event.item.name == 'minecraft:stick'
    and event.item.displayName == 'Wand of equal Trade'
    then
      setWorldPos(toPos(event.pos))
      if event.type == "RIGHT_CLICK" then
        woet_copy()
      end
      if event.type == "LEFT_CLICK" then
        woet_paste()
      end
    end
    sleep(1)
  end
end

function woet_copy()
  copyClip(selectBox(1, 1, 1), "woet_selected")
end

function woet_paste()
  blockToReplace = getBlock()
  toVisit = {toVec(getWorldPos())}
  toReplace = {}

  while #toVisit > 0 do
    visit = table.remove(toVisit)
    setWorldPos(toPos(visit))
    table.addVec(toReplace, visit)

    neighbours = getNeighbours(function(block) return block==blockToReplace; end)
    for _, neighbour in pairs(neighbours) do
      if not table.containsVec(toReplace, neighbour) then
        table.insert(toVisit, neighbour)
      end
    end
  end

  for _, replace in pairs(toReplace) do
    setWorldPos(toPos(replace))
    pasteClip("woet_selected")
  end
end

function table.addVec(table, vec)
  vecString = toVecString(vec)
  table[vecString] = vec
end

function table.containsVec(table, vec)
  vecString = toVecString(vec)
  return table[vecString] ~= nil
end

function toVec(x,y,z)
  return {x=x,y=y,z=z}
end

function toVecString(vec)
  return toPosString(toPos(vec))
end

function toPos(vec)
  return vec.x,vec.y,vec.z
end

function toPosString(x,y,z)
  return x.."/"..y.."/"..z
end

function toString(var)
  if type(var) == "table" then
    return table.toString(var)
  end
  return var
end

function table.toString(table)
  result = '{'
  for k, v in pairs(table) do
    result = result .. toString(k) .. '=' .. toString(v) .. ','
  end
  endIndex = next(table) and -2 or -1
  return string.sub(result, 1, endIndex) .. '}'
end