--A player presses their Done button.
function done(obj, player)
  --Check if the correct player clicked the button.
  local active = string.sub(obj.guid, 2, 2)
  if player != colors['n'..active] then
    broadcastToColor('Sorry, but '..playername(active)..' must place this Done button.', player, 'Red')
    return
  end
  local value = getstate('b00009')
  --Make sure the tile number is at least two digits long.
  if string.len(value) < 2 then
    value='0'..value
  end
  local bagguid = 'b'..active..'0001'
  local bagobj = getObjectFromGUID(bagguid)
  local tileguid = 'c'..active..'00'..value
  local tile = getObjectFromGUID(tileguid)
  if not tile then
    bagobj.clearButtons()
    local found = false
    for j = 1, 6 do
      local guid = 'b'..j..'0001'
      if checkbag(guid, tileguid) then
        found = true
        local obj = getObjectFromGUID(bagguid)
        local take = {}
        take.position = pos
        take.rotation = rot
        take.guid = tileguid
        take.smooth = true
        take.callback_function = nil
        obj.takeObject(take)
      end
    end
    if found then
      broadcastToColor('Sorry, something went wrong. Please try again.', player, 'Red')
    else
      broadcastToColor('Sorry, but I cannot find tile '..tonumber(value)..'.', player, 'Red')
      setstate('b'..active..'0001', 0)
      tilecheck()
    end
    return
  end
  --Check the position the tile would be placed at.
  local dashboard = getObjectFromGUID('d'..active..'0001')
  local pos = dashboard.positionToLocal(tile.getPosition())
  local spot = 0
  local xgap = (tiles.p33.x - tiles.p22.x) / 2
  local zgap = (tiles.p33.z - tiles.p22.z) / 2
  for i = 2, 7 do
    if pos.x > (tiles['p2'..i].x + xgap) then
      if pos.x < (tiles['p2'..i].x - xgap) then
        for j = 2, 6 do
          if pos.z > (tiles['p'..j..i].z - zgap) then
            if pos.z < (tiles['p'..j..i].z + zgap) then
              spot = tonumber(j..i)
            end
          end
        end
      end
    end
  end
  if spot == 0 then
    broadcastToColor('Sorry, but tile '..tonumber(value)..' is not placed on your Dashboard.', player, 'Red')
    return
  end
  --Check if any of the player's tiles are already placed on that spot.
  for i = 1, 9 do
    if spot == getstate('c'..active..'000'..i) then
      broadcastToColor('Sorry, but you cannot place two tiles on top of each other.', player, 'Red')
      return
    end
  end
  for i = 10, 38 do
    if spot == getstate('c'..active..'00'..i) then
      broadcastToColor('Sorry, but you cannot place two tiles on top of each other.', player, 'Red')
      return
    end
  end
  --Place the tile.
  pos = dashboard.positionToWorld(tiles['p'..spot])
  local rot = dashboard.getRotation()
  tile.setPositionSmooth(pos)
  tile.setRotationSmooth(rot)
  tile.setLock(true)
  tile.interactable = false
  tile.script_state = spot
  bagobj.script_state = 0
  --Check if lava needs to be placed.
  local lava = false
  if getstate('c'..active..'0037') == spot - 10 then
    lava = true
  elseif getstate('c'..active..'0037') == spot - 1 then
    lava = true
  elseif getstate('c'..active..'0037') == spot + 1 then
    lava = true
  elseif getstate('c'..active..'0037') == spot + 10 then
    lava = true
  elseif getstate('c'..active..'0038') == spot - 10 then
    lava = true
  elseif getstate('c'..active..'0038') == spot - 1 then
    lava = true
  elseif getstate('c'..active..'0038') == spot + 1 then
    lava = true
  elseif getstate('c'..active..'0038') == spot + 10 then
    lava = true
  end
  spot = spot + (100 * active)
  --Place lava.
  if lava then
    local lavapos = pos
    lavapos.y = 5
    takefrombag('b00004', '', lavapos, rot, true, true, spot)
  end
  --Place a crystal or goldnugget.
  pos.y = 1.5
  if tile.getVar('special') == 'crystal' then
    takefrombag('b00002', '', pos, rot, true, true, spot)
  elseif tile.getVar('special') == 'goldnugget' then
    takefrombag('b00003', '', pos, rot, true, true, spot)
  end
  tilecheck()
end