Party Swap Redux

# Instructions: First, decide how many parties you want to use and initialize
# them with a script call of:
#   setup_multiple_parties(number)
# In theory, number can go as high as you want. Tested for 2, however.
# Next, initialize each party with a scrip call of:
#   define_party(number, member1, member 2, ...)
# The first number in this script call determines which party you're defining
# (note that parties start at 0, not 1), while the following numbers are the
# actor ids of the members of that party. Actor ids start at 1, not 0, and
# should not have leading zeros.
# Finally, when you want to swap parties, use this call:
#   swap_party(first_party, second_party)
# first_party and second_party are the numbers of the two parties you want to
# swap. first_party is the one you're swapping out and second_party is the one
# you're swapping in.

# This script goes below materials and above main. Since all the methods are
# new, it should be highly unlikely to have compatibility issues.

#==============================================================================
# ■ Game_Party
#==============================================================================

class Game_Party < Game_Unit

  def setup_multiple_parties(number)
    @multiple_parties = []
    i = 0
    while i < number
      @multiple_parties[i] = []
      i += 1
    end
  end

  def multiple_parties(index, index2)
    return @multiple_parties[index][index2]
  end


  def swap_party(first_party, second_party)
    i = 0
    while i < @multiple_parties[first_party].length
      @multiple_parties[first_party][i] = $game_party.members[i].id
      i += 1
    end
    i = 0
    while i < @multiple_parties[first_party].length
      $game_party.remove_actor(@multiple_parties[first_party][i])
      i += 1
    end
    i = 0
    while i < @multiple_parties[second_party].length
      $game_party.add_actor(@multiple_parties[second_party][i])
      i += 1
    end
  end


  def party_clear(number)
    @multiple_parties[number] = []
  end

  def party_member_add(number, member)
    @multiple_parties[number].push(member)
  end


end # Game_Party


#==============================================================================
# ■ Game_Interpreter
#==============================================================================

class Game_Interpreter

  def swap_party(first_party, second_party)
    $game_party.swap_party(first_party, second_party)
  end

  def define_party(number, *members)
    return if members.empty?
      $game_party.party_clear(number)
    for member in members
      $game_party.party_member_add(number, member)
    end
  end

  def setup_multiple_parties(number)
    $game_party.setup_multiple_parties(number)
  end

end