class CommandHandler(object):

  def tokenize_params(self):
    cleaned = self.params.lower().strip()
    tokens = []
    for token in cleaned.split(' '):
        token = token.strip()
        if len(token) > 0:
            tokens.append(token)
    self.tokens = tokens

  def look(self):
    self.mud.send_message(self.id, "")
    if len(self.tokens) > 0 and self.tokens[0] == 'at':
        del self.tokens[0]
    if len(self.tokens) == 0:
        self.mud.send_message(self.id, self.room.get_description())
    else:
        subject = self.tokens[0]
        items = self.room.get_look_items()
        for item in items:
            if subject in item:
                self.mud.send_message(self.id, items[item])
                return True
        self.mud.send_message(self.id, "That doesn't seem to be here.")

    playershere = []
    # go through every player in the game
    for pid, pl in self.players.items():
        # if they're in the same room as the player
        if self.players[pid]["room"] == self.players[self.id]["room"]:
            # ... and they have a name to be shown
            if self.players[pid]["name"] is not None:
                # add their name to the list
                playershere.append(self.players[pid]["name"])

    # send player a message containing the list of players in the room
    self.mud.send_message(self.id, "Players here: {}".format(
                                            ", ".join(playershere)))

    # send player a message containing the list of exits from this room
    self.mud.send_message(self.id, "Exits are: {}".format(
                                  ", ".join(self.room.get_exits())))

    return True

  def parse(self, id, cmd, params, room, mud, players):
    self.id = id
    self.cmd = cmd
    self.params = params
    self.tokenize_params()
    self.room = room
    self.mud = mud
    self.players = players

    try:
        method = getattr(self, cmd)
        return method()
    except AttributeError:
        return False