Tinkers Construct Hammer

hammer.lua

local pkg = {}

function pkg.give()
  if spell.owner then
    spell:execute('give %s golden_pickaxe 1 0 {hammer:true}')
  end
end

function pkg.stop()
  spell:execute('kill @e[type=wol:spell,tag=adrodoc.hammer]')
end

local function isRock(block)
  -- return block.material == Materials.ROCK
  local name = block.name
  return not block.material.requiresNoTool and
    -- Materials.ANVIL
    name ~= 'anvil' and
    -- Materials.BARRIER
    name ~= 'barrier' and
    -- Materials.CRAFTED_SNOW
    name ~= 'snow' and
    -- Materials.IRON
    name ~= 'brewing_stand' and
    name ~= 'cauldron' and
    name ~= 'command_block' and
    name ~= 'hopper' and
    name ~= 'structure_block' and

    name ~= 'lapis_block' and
    name ~= 'gold_block' and
    name ~= 'iron_block' and
    name ~= 'diamond_block' and
    name ~= 'iron_door' and
    name ~= 'iron_bars' and
    name ~= 'emerald_block' and
    name ~= 'light_weighted_pressure_plate' and
    name ~= 'heavy_weighted_pressure_plate' and
    name ~= 'redstone_block' and
    name ~= 'iron_trapdoor' and
    -- Materials.SNOW
    name ~= 'snow_layer' and
    -- Materials.WEB
    name ~= 'web'
end

local function destroyNeighbours(origPos, createVec3)
  for a=-1,1 do
    for b =-1,1 do
      spell.pos = origPos + createVec3(a,b)
      if isRock(spell.block) then
        spell:execute('setblock ~ ~ ~ air 0 destroy')
      end
    end
  end
end

local playerFaces = {}
  
local function eventListener(event)
  if event.name == 'LeftClickBlockEvent' then
    playerFaces[event.player] = event.face
  else
    local tag = event.player.mainhand.nbt.tag
    if tag and tag.hammer and isRock(event.block) then
      local face = playerFaces[event.player]
      if face == 'up' or face == 'down' then
        destroyNeighbours(event.pos, function(x,z)
          return Vec3(x,0,z)
        end)
      elseif face == 'north' or face == 'south' then
        destroyNeighbours(event.pos, function(x,y)
          return Vec3(x,y,0)
        end)
      else
        destroyNeighbours(event.pos, function(y,z)
          return Vec3(0,y,z)
        end)
      end
    end
  end
end

function pkg.start()
  pkg.stop()
  spell:addTag('adrodoc.hammer')
  --[[
  local queue = Events.connect('LeftClickBlockEvent','BlockBreakEvent')
  while true do
    local event = queue:next()
    eventListener(event)
  end
  ]]
  Events.on('LeftClickBlockEvent','BlockBreakEvent'):call(eventListener)
end

return pkg