Elixir command parsing

command_parsing.ex

# I've been wondering about a pattern-matching-driven approach to what we've been talking about, e.g.

def parse_command(input) do
  input
  |> String.strip
  |> match_command
end

def match_command("north"), do: {Player, :move, [:north, player, world]}
def match_command("east"), do: {Player, :move, [:east, player, world]}
def match_command("west"), do: {Player, :move, [:west, player, world]}
# ...
def match_command("quit"), do: {Game, :quit, []}
def match_command(_), do: {Interface, :unknown_command, []}

For some reason I'm resistant. This would instantly solve some problems for me, but it's hard to get past the desire to keep the command library decoupled from the caller.