"""Command objects for the MUFF Engine"""
-# Copyright (c) 2005 mudpy, Jeremy Stanley <fungi@yuggoth.org>
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-# - Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-# - Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following
-# disclaimer in the documentation and/or other materials provided
-# with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-# COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
+# Copyright (c) 2005 mudpy, Jeremy Stanley <fungi@yuggoth.org>, all rights reserved.
+# Licensed per terms in the LICENSE file distributed with this software.
+# command data like descriptions, help text, limits, et cetera, are stored in
+# ini-style configuration files supported by the ConfigParser module
import ConfigParser
+
+# md5 hashing is used for verification of account passwords
import md5
+
+# the os module is used to we can get a directory listing and build lists of
+# multiple config files in one directory
import os
+
+# the random module is useful for creating random conditional output
import random
+
+# string.split is used extensively to tokenize user input (break up command
+# names and parameters)
import string
+# bit of a hack to load all modules in the muff package
import muff
for module in muff.__all__:
exec("import " + module)
+# does the files:commands setting exist yet?
try:
- if muffconf.config_data.get("general", "command_path"):
- pass
+ if muffconf.config_data.get("files", "commands"): pass
+
+# if not, reload the muffconf module
except AttributeError:
reload(muffconf)
-command_path = muffconf.config_data.get("general", "command_path")
+
+# now we can safely nab the command path setting and build a list of data files
+command_path = muffconf.config_data.get("files", "commands")
command_files = []
for each_file in os.listdir(command_path):
command_files.append(command_path + "/" + each_file)
+
+# read the command data files
command_data = ConfigParser.SafeConfigParser()
command_data.read(command_files)
+
+# this creates a list of commands mentioned in the data files
command_list = command_data.sections()
def handle_user_input(user, input):
+ """The main handler, branches to a state-specific handler."""
+
+ # TODO: change this to use a dict
if user.state == "active": handler_active(user, input)
elif user.state == "entering account name": handler_entering_account_name(user, input)
elif user.state == "checking password": handler_checking_password(user, input)
elif user.state == "checking new account name": handler_checking_new_account_name(user, input)
elif user.state == "entering new password": handler_entering_new_password(user, input)
elif user.state == "verifying new password": handler_verifying_new_password(user, input)
+
+ # if there's input with an unknown user state, something is wrong
else: handler_fallthrough(user, input)
+
+ # since we got input, flag that the menu/prompt needs to be redisplayed
user.menu_seen = False
def handler_entering_account_name(user, input):
+ """Handle the login account name."""
+
+ # did the user enter anything?
if input:
+
+ # keep only the first word and convert to lower-case
user.proposed_name = string.split(input)[0].lower()
+
+ # try to get a password hash for the proposed name
user.get_passhash()
+
+ # if we have a password hash, time to request a password
+ # TODO: make get_passhash() return pass/fail and test that
if user.passhash:
user.state = "checking password"
+
+ # otherwise, this could be a brand new user
else:
user.name = user.proposed_name
user.proposed_name = None
user.load()
user.state = "checking new account name"
+
+ # if the user entered nothing for a name, then buhbye
+ # TODO: make a disconnect state instead of calling command_quit()
else:
command_quit(user)
def handler_checking_password(user, input):
+ """Handle the login account password."""
+
+ # does the hashed input equal the stored hash?
if md5.new(user.proposed_name + input).hexdigest() == user.passhash:
+
+ # if so, set the username and load from cold storage
user.name = user.proposed_name
- user.proposed_name = None
+ del(user.proposed_name)
user.load()
+
+ # now go active
+ # TODO: branch to character creation and selection menus
user.state = "active"
+
+ # if at first your hashes don't match, try, try again
elif user.password_tries < muffconf.config_data.getint("general", "password_tries"):
user.password_tries += 1
user.error = "incorrect"
+
+ # we've exceeded the maximum number of password failures, so disconnect
+ # TODO: make a disconnect state instead of calling command_quit()
else:
user.send("$(eol)$(red)Too many failed password attempts...$(nrm)$(eol)")
command_quit(user)
def handler_checking_new_account_name(user, input):
+ """Handle input for the new user menu."""
+
+ # if there's input, take the first character and lowercase it
if input:
choice = input.lower()[0]
+
+ # if there's no input, use the default
else:
choice = muffmenu.get_default(user)
+
+ # user selected to disconnect
+ # TODO: make a disconnect state instead of calling command_quit()
if choice == "d":
command_quit(user)
+
+ # go back to the login screen
elif choice == "g":
user.state = "entering account name"
+
+ # new user, so ask for a password
elif choice == "n":
user.state = "entering new password"
+
+ # user entered a non-existent option
else:
user.error = "default"
def handler_entering_new_password(user, input):
+ """Handle a new password entry."""
+
+ # make sure the password is strong--at least one upper, one lower and
+ # one digit, seven or more characters in length
if len(input) > 6 and len(filter(lambda x: x>="0" and x<="9", input)) and len(filter(lambda x: x>="A" and x<="Z", input)) and len(filter(lambda x: x>="a" and x<="z", input)):
+
+ # hash and store it, then move on to verification
user.passhash = md5.new(user.name + input).hexdigest()
user.state = "verifying new password"
+
+ # the password was weak, try again if you haven't tried too many times
elif user.password_tries < muffconf.config_data.getint("general", "password_tries"):
user.password_tries += 1
user.error = "weak"
+
+ # too many tries, so adios
+ # TODO: make a disconnect state instead of calling command_quit()
else:
user.send("$(eol)$(red)Too many failed password attempts...$(nrm)$(eol)")
command_quit(user)
def handler_verifying_new_password(user, input):
+ """Handle the re-entered new password for verification."""
+
+ # hash the input and match it to storage
if md5.new(user.name + input).hexdigest() == user.passhash:
+
+ # the hashes matched, so go active
+ # TODO: branch to character creation and selection menus
user.state = "active"
+
+ # go back to entering the new password as long as you haven't tried
+ # too many times
elif user.password_tries < muffconf.config_data.getint("general", "password_tries"):
user.password_tries += 1
user.error = "differs"
user.state = "entering new password"
+
+ # otherwise, sayonara
+ # TODO: make a disconnect state instead of calling command_quit()
else:
user.send("$(eol)$(red)Too many failed password attempts...$(nrm)$(eol)")
command_quit(user)
+# TODO: um, input is a reserved word. better replace it in all sources with
+# something else, like input_data
def handler_active(user, input):
+ """Handle input for active users."""
+
+ # users reaching this stage should be considered authenticated
+ # TODO: this should actually happen before or in load() instead
if not user.authenticated: user.authenticated = True
+
+ # split out the command (first word) and parameters (everything else)
try:
inputlist = string.split(input, None, 1)
command = inputlist[0]
parameters = inputlist[1]
except:
parameters = ""
+ del(inputlist)
+
+ # lowercase the command
command = command.lower()
- if not command: command_null(user, command, parameters)
- elif command in command_list: exec("command_" + command + "(user, command, parameters)")
- else: command_error(user, command, parameters)
+ # the command matches a command word for which we have data
+ if command in command_list: exec("command_" + command + "(user, command, parameters)")
+
+ # no data matching the entered command word
+ elif command: command_error(user, command, parameters)
+
+# TODO: need a log function to handle conditions like this instead of print()
def handler_fallthrough(user, input):
+ """Input received in an unknown user state."""
if input:
print("User \"" + user + "\" entered \"" + input + "\" while in unknown state \"" + user.state + "\".")
def command_halt(user, command="", parameters=""):
+ """Halt the world."""
+
+ # let everyone know
+ # TODO: optionally take input for the message
muffmisc.broadcast(user.name + " halts the world.")
+
+ # save everyone
+ # TODO: probably want a misc function for this
for each_user in muffvars.userlist:
each_user.save()
+
+ # set a flag to terminate the world
muffvars.terminate_world = True
def command_reload(user, command="", parameters=""):
- user.send("Reloading all code modules.")
+ """Reload all code modules, configs and data."""
+
+ # let the user know
+ user.send("Reloading all code modules, configs and data.")
+
+ # set a flag to reload
muffvars.reload_modules = True
def command_quit(user, command="", parameters=""):
+ """Quit the world."""
+
+ # save to cold storage
user.save()
+
+ # close the connection
user.connection.close()
+
+ # remove from the list
user.remove()
def command_help(user, command="", parameters=""):
+ """List available commands and provide help for commands."""
+
+ # did the user ask for help on a specific command word?
if parameters:
+
+ # is the command word one for which we have data?
if parameters in command_list:
- if command_data.has_section(parameters):
- try:
- description = command_data.get(parameters, "description")
- except:
- description = "(no short description provided)"
- output = "$(grn)" + parameters + "$(nrm) - " + command_data.get(parameters, "description") + "$(eol)$(eol)"
- try:
- help_text = command_data.get(parameters, "help")
- except:
- help_text = "No help is provided for this command."
- output += help_text
- else:
- output = "There is no information on that command."
+
+ # add a description if provided
+ try:
+ description = command_data.get(parameters, "description")
+ except:
+ description = "(no short description provided)"
+ output = "$(grn)" + parameters + "$(nrm) - " + command_data.get(parameters, "description") + "$(eol)$(eol)"
+
+ # add the help text if provided
+ try:
+ help_text = command_data.get(parameters, "help")
+ except:
+ help_text = "No help is provided for this command."
+ output += help_text
+
+ # no data for the requested command word
else:
output = "That is not an available command."
-
+
+ # no specific command word was indicated
else:
+
+ # give a sorted list of commands with descriptions if provided
output = "These are the commands available to you:$(eol)$(eol)"
sorted_commands = command_list
sorted_commands.sort()
description = "(no short description provided)"
output += " $(grn)" + item + "$(nrm) - " + command_data.get(item, "description") + "$(eol)"
output += "$(eol)Enter \"help COMMAND\" for help on a command named \"COMMAND\"."
+
+ # send the accumulated output to the user
user.send(output)
def command_say(user, command="", parameters=""):
- message = parameters.strip("\"'`").capitalize()
+ """Speak to others in the same room."""
+
+ # the user entered a message
if parameters:
+
+ # get rid of quote marks on the ends of the message and
+ # capitalize the first letter
+ message = parameters.strip("\"'`").capitalize()
+
+ # exclaim because the message ended in an exclamation mark
+ # TODO: use the ends() function instead of an index throughout
if message[-1] == "!":
action = "exclaim"
+
+ # begin because the message ended in miscellaneous punctuation
elif message[-1] in [ ",", "-", ":", ";" ]:
action = "begin"
+
+ # muse because the message ended in an ellipsis
elif message[-3:] == "...":
action = "muse"
+
+ # ask because the message ended in a question mark
elif message[-1] == "?":
action = "ask"
+
+ # say because the message ended in a singular period
+ # TODO: entering one period results in a double-period--oops!
else:
action = "say"
message += "."
+
+ # capitalize a list of words within the message
+ # TODO: move this list to the config
capitalization = [ "i", "i'd", "i'll" ]
for word in capitalization:
message = message.replace(" " + word + " ", " " + word.capitalize() + " ")
+
+ # tell the room
+ # TODO: we won't be using broadcast once there are actual rooms
muffmisc.broadcast(user.name + " " + action + "s, \"" + message + "\"")
+
+ # there was no message
else:
user.send("What do you want to say?")
-def command_null(user, command="", parameters=""):
- pass
-
def command_error(user, command="", parameters=""):
+ """Generic error for an unrecognized command word."""
+
+ # 90% of the time use a generic error
if random.random() > 0.1:
message = "I'm not sure what \"" + command
if parameters:
message += " " + parameters
message += "\" means..."
+
+ # 10% of the time use the classic diku error
else:
message = "Arglebargle, glop-glyf!?!"
+
+ # send the error message
user.send(message)
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