def suggest_command(self):
"""Create default "command not available" error message."""
raw = self.raw_string.strip() # The raw command line text, minus surrounding whitespace
char = self.character
message = ["|wCommand |n'|y%s|n' |wis not available." % raw]
suggestions = string_suggestions(raw, self.cmdset.get_all_cmd_keys_and_aliases(char), cutoff=0.72, maxnum=3)
if suggestions:
if len(suggestions) == 1:
message.append('Maybe you meant |n"|g%s|n" |w?' % suggestions[0])
else:
message.append('Maybe you meant %s' % '|w, '.join('|n"|g%s|n"' % each for each in suggestions[:-1]))
message.append('|wor |n"|g%s|n" |w?' % suggestions[-1:][0])
else:
message.append('Type |n"|ghelp|n"|w for help.')
return ' '.join(message)
def func(self):
"""
Run the dynamic help entry creator.
"""
query, cmdset = self.args, self.cmdset
caller = self.caller
suggestion_cutoff = self.suggestion_cutoff
suggestion_maxnum = self.suggestion_maxnum
if not query:
query = "all"
# removing doublets in cmdset, caused by cmdhandler
# having to allow doublet commands to manage exits etc.
cmdset.make_unique(caller)
# retrieve all available commands and database topics
all_cmds = [cmd for cmd in cmdset if self.check_show_help(cmd, caller)]
all_topics = [
topic for topic in HelpEntry.objects.all()
if topic.access(caller, 'view', default=True)
]
all_categories = list(
set([cmd.help_category.lower() for cmd in all_cmds] +
[topic.help_category.lower() for topic in all_topics]))
if query in ("list", "all"):
# we want to list all available help entries, grouped by category
hdict_cmd = defaultdict(list)
hdict_topic = defaultdict(list)
# create the dictionaries {category:[topic, topic ...]} required by format_help_list
# Filter commands that should be reached by the help
# system, but not be displayed in the table.
for cmd in all_cmds:
if self.should_list_cmd(cmd, caller):
hdict_cmd[cmd.help_category].append(cmd.key)
[
hdict_topic[topic.help_category].append(topic.key)
for topic in all_topics
]
# report back
self.msg_help(self.format_help_list(hdict_cmd, hdict_topic))
return
# Try to access a particular command
# build vocabulary of suggestions and rate them by string similarity.
suggestions = None
if suggestion_maxnum > 0:
vocabulary = [cmd.key for cmd in all_cmds if cmd
] + [topic.key
for topic in all_topics] + all_categories
[vocabulary.extend(cmd.aliases) for cmd in all_cmds]
suggestions = [
sugg for sugg in string_suggestions(query,
set(vocabulary),
cutoff=suggestion_cutoff,
maxnum=suggestion_maxnum)
if sugg != query
]
if not suggestions:
suggestions = [
sugg for sugg in vocabulary
if sugg != query and sugg.startswith(query)
]
# try an exact command auto-help match
match = [cmd for cmd in all_cmds if cmd == query]
if len(match) == 1:
formatted = self.format_help_entry(match[0].key,
match[0].get_help(
caller, cmdset),
aliases=match[0].aliases,
suggested=suggestions)
self.msg_help(formatted)
return
# try an exact database help entry match
match = list(HelpEntry.objects.find_topicmatch(query, exact=True))
if len(match) == 1:
formatted = self.format_help_entry(match[0].key,
match[0].entrytext,
aliases=match[0].aliases.all(),
suggested=suggestions)
self.msg_help(formatted)
return
# try to see if a category name was entered
if query in all_categories:
self.msg_help(
self.format_help_list(
{
query: [
cmd.key
for cmd in all_cmds if cmd.help_category == query
]
}, {
query: [
topic.key for topic in all_topics
if topic.help_category == query
]
}))
return
# no exact matches found. Just give suggestions.
self.msg(
self.format_help_entry("",
"No help entry found for '%s'" % query,
None,
suggested=suggestions))
def func(self):
"""
Run the dynamic help entry creator.
"""
query, cmdset = self.args, self.cmdset
caller = self.caller
unavailable = False
suggestion_cutoff = 0.6
suggestion_maxnum = 5
if not query:
query = "all"
# removing doublets in cmdset, caused by cmdhandler
# having to allow doublet commands to manage exits etc.
cmdset.make_unique(caller)
# retrieve all available commands and database topics
all_cmds = [
cmd for cmd in cmdset if cmd.auto_help and cmd.access(caller)
]
player = caller
if not hasattr(caller, 'character'):
player = caller.player
if not player.character:
try:
char_cmds = [
cmd for cmd in player.char_ob.cmdset.all()[0]
if cmd.auto_help and cmd.access(caller)
]
all_cmds += char_cmds
except Exception:
pass
all_topics = [
topic for topic in HelpEntry.objects.all()
if topic.access(caller, 'view', default=True)
]
all_categories = list(
set([cmd.help_category.lower() for cmd in all_cmds] +
[topic.help_category.lower() for topic in all_topics]))
if query in ("list", "all"):
# we want to list all available help entries, grouped by category
hdict_cmd = defaultdict(list)
hdict_topic = defaultdict(list)
# create the dictionaries {category:[topic, topic ...]} required by format_help_list
[hdict_cmd[cmd.help_category].append(cmd.key) for cmd in all_cmds]
[
hdict_topic[topic.help_category].append(topic.key)
for topic in all_topics
]
# report back
self.msg(format_help_list(hdict_cmd, hdict_topic, brief=True))
return
# Try to access a particular command
# build vocabulary of suggestions and rate them by string similarity.
vocabulary = [cmd.key for cmd in all_cmds if cmd
] + [topic.key for topic in all_topics] + all_categories
[vocabulary.extend(cmd.aliases) for cmd in all_cmds]
suggestions = [
sugg for sugg in string_suggestions(query,
set(vocabulary),
cutoff=suggestion_cutoff,
maxnum=suggestion_maxnum)
if sugg != query
]
if not suggestions:
suggestions = [
sugg for sugg in vocabulary
if sugg != query and sugg.startswith(query)
]
found_match = False
# try an exact command auto-help match
match = [cmd for cmd in all_cmds if cmd == query]
# Account for prefixes
if not match:
if (query[0] == '+'):
match = [
cmd for cmd in all_cmds
if ((cmd == query[1:]) or (cmd == "@%s" % query[1:]))
]
elif (query[0] == '@'):
match = [
cmd for cmd in all_cmds
if ((cmd == query[1:]) or (cmd == "+%s" % query[1:]))
]
else:
match = [
cmd for cmd in all_cmds
if ((cmd == "@%s" % query) or (cmd == "+%s" % query))
]
if not match:
match = [cmd for cmd in SituationalCmdSet() if cmd == query]
unavailable = True
if len(match) == 1:
if not [ob for ob in self.cmdset if ob == match[0]]:
unavailable = True
doc_text = match[0].get_help(caller, cmdset)
try:
tags = match[0].help_entry_tags
except AttributeError:
tags = None
self.msg(
format_help_entry(match[0].key,
doc_text,
aliases=match[0].aliases,
suggested=suggestions,
unavailable=unavailable,
related_tags=tags))
found_match = True
# try an exact database help entry match
match = list(HelpEntry.objects.find_topicmatch(query, exact=True))
match = [
topic for topic in match
if topic.access(caller, 'view', default=True)
]
if len(match) == 1:
self.msg(
format_help_entry(match[0].key,
match[0].entrytext,
suggested=suggestions))
found_match = True
# try to see if a category name was entered
if query in all_categories:
# fixed bug - wouldn't match if category name was capitalized
self.msg(
format_help_list(
{
query: [
cmd.key for cmd in all_cmds
if cmd.help_category.lower() == query
]
}, {
query: [
topic.key for topic in all_topics
if topic.help_category.lower() == query
]
}))
return
if found_match:
return
# no exact matches found. Just give suggestions.
self.msg(
format_help_entry("",
"No help entry found for '%s'" % query,
None,
suggested=suggestions))
def cmdhandler(called_by,
raw_string,
_testing=False,
callertype="session",
session=None,
cmdobj=None,
cmdobj_key=None,
**kwargs):
"""
This is the main mechanism that handles any string sent to the engine.
Args:
called_by (Session, Player or Object): Object from which this
command was called. which this was called from. What this is
depends on the game state.
raw_string (str): The command string as given on the command line.
_testing (bool, optional): Used for debug purposes and decides if we
should actually execute the command or not. If True, the
command instance will be returned.
callertype (str, optional): One of "session", "player" or
"object". These are treated in decending order, so when the
Session is the caller, it will merge its own cmdset into
cmdsets from both Player and eventual puppeted Object (and
cmdsets in its room etc). A Player will only include its own
cmdset and the Objects and so on. Merge order is the same
order, so that Object cmdsets are merged in last, giving them
precendence for same-name and same-prio commands.
session (Session, optional): Relevant if callertype is "player" - the session will help
retrieve the correct cmdsets from puppeted objects.
cmdobj (Command, optional): If given a command instance, this will be executed using
`called_by` as the caller, `raw_string` representing its arguments and (optionally)
`cmdobj_key` as its input command name. No cmdset lookup will be performed but
all other options apply as normal. This allows for running a specific Command
within the command system mechanism.
cmdobj_key (string, optional): Used together with `cmdobj` keyword to specify
which cmdname should be assigned when calling the specified Command instance. This
is made available as `self.cmdstring` when the Command runs.
If not given, the command will be assumed to be called as `cmdobj.key`.
Kwargs:
kwargs (any): other keyword arguments will be assigned as named variables on the
retrieved command object *before* it is executed. This is unused
in default Evennia but may be used by code to set custom flags or
special operating conditions for a command as it executes.
Returns:
deferred (Deferred): This deferred is fired with the return
value of the command's `func` method. This is not used in
default Evennia.
"""
@inlineCallbacks
def _run_command(cmd, cmdname, args, raw_string, cmdset, session, player):
"""
Helper function: This initializes and runs the Command
instance once the parser has identified it as either a normal
command or one of the system commands.
Args:
cmd (Command): Command object.
cmdname (str): Name of command.
args (str): Extra text entered after the identified command.
raw_string (str): Full input string.
cmdset (CmdSet): Command sert the command belongs to (if any)..
session (Session): Session of caller (if any).
player (Player): Player of caller (if any).
Returns:
deferred (Deferred): this will fire with the return of the
command's `func` method.
Raises:
RuntimeError: If command recursion limit was reached.
"""
global _COMMAND_NESTING
try:
# Assign useful variables to the instance
cmd.caller = caller
cmd.cmdstring = cmdname
cmd.args = args
cmd.cmdset = cmdset
cmd.session = session
cmd.player = player
cmd.raw_string = raw_string
#cmd.obj # set via on-object cmdset handler for each command,
# since this may be different for every command when
# merging multuple cmdsets
if hasattr(cmd, 'obj') and hasattr(cmd.obj, 'scripts'):
# cmd.obj is automatically made available by the cmdhandler.
# we make sure to validate its scripts.
yield cmd.obj.scripts.validate()
if _testing:
# only return the command instance
returnValue(cmd)
# assign custom kwargs to found cmd object
for key, val in kwargs.items():
setattr(cmd, key, val)
_COMMAND_NESTING[called_by] += 1
if _COMMAND_NESTING[called_by] > _COMMAND_RECURSION_LIMIT:
err = _ERROR_RECURSION_LIMIT.format(
recursion_limit=_COMMAND_RECURSION_LIMIT,
raw_string=raw_string,
cmdclass=cmd.__class__)
raise RuntimeError(err)
# pre-command hook
abort = yield cmd.at_pre_cmd()
if abort:
# abort sequence
returnValue(abort)
# Parse and execute
yield cmd.parse()
# main command code
# (return value is normally None)
ret = cmd.func()
if isinstance(ret, types.GeneratorType):
# cmd.func() is a generator, execute progressively
_progressive_cmd_run(cmd, ret)
yield None
else:
ret = yield ret
# post-command hook
yield cmd.at_post_cmd()
if cmd.save_for_next:
# store a reference to this command, possibly
# accessible by the next command.
caller.ndb.last_cmd = yield copy(cmd)
else:
caller.ndb.last_cmd = None
# return result to the deferred
returnValue(ret)
except Exception:
_msg_err(caller, _ERROR_UNTRAPPED)
raise ErrorReported(raw_string)
finally:
_COMMAND_NESTING[called_by] -= 1
raw_string = to_unicode(raw_string, force_string=True)
session, player, obj = session, None, None
if callertype == "session":
session = called_by
player = session.player
obj = session.puppet
elif callertype == "player":
player = called_by
if session:
obj = yield session.puppet
elif callertype == "object":
obj = called_by
else:
raise RuntimeError("cmdhandler: callertype %s is not valid." %
callertype)
# the caller will be the one to receive messages and excert its permissions.
# we assign the caller with preference 'bottom up'
caller = obj or player or session
# The error_to is the default recipient for errors. Tries to make sure a player
# does not get spammed for errors while preserving character mirroring.
error_to = obj or session or player
try: # catch bugs in cmdhandler itself
try: # catch special-type commands
if cmdobj:
# the command object is already given
cmd = cmdobj() if callable(cmdobj) else cmdobj
cmdname = cmdobj_key if cmdobj_key else cmd.key
args = raw_string
unformatted_raw_string = "%s%s" % (cmdname, args)
cmdset = None
session = session
player = player
else:
# no explicit cmdobject given, figure it out
cmdset = yield get_and_merge_cmdsets(caller, session, player,
obj, callertype,
raw_string)
if not cmdset:
# this is bad and shouldn't happen.
raise NoCmdSets
unformatted_raw_string = raw_string
raw_string = raw_string.strip()
if not raw_string:
# Empty input. Test for system command instead.
syscmd = yield cmdset.get(CMD_NOINPUT)
sysarg = ""
raise ExecSystemCommand(syscmd, sysarg)
# Parse the input string and match to available cmdset.
# This also checks for permissions, so all commands in match
# are commands the caller is allowed to call.
matches = yield _COMMAND_PARSER(raw_string, cmdset, caller)
# Deal with matches
if len(matches) > 1:
# We have a multiple-match
syscmd = yield cmdset.get(CMD_MULTIMATCH)
sysarg = _("There were multiple matches.")
if syscmd:
# use custom CMD_MULTIMATCH
syscmd.matches = matches
else:
# fall back to default error handling
sysarg = yield _SEARCH_AT_RESULT(
[match[2] for match in matches],
caller,
query=matches[0][0])
raise ExecSystemCommand(syscmd, sysarg)
cmdname, args, cmd = "", "", None
if len(matches) == 1:
# We have a unique command match. But it may still be invalid.
match = matches[0]
cmdname, args, cmd = match[0], match[1], match[2]
if not matches:
# No commands match our entered command
syscmd = yield cmdset.get(CMD_NOMATCH)
if syscmd:
# use custom CMD_NOMATCH command
sysarg = raw_string
else:
# fallback to default error text
sysarg = _(
"Command '%s' is not available.") % raw_string
suggestions = string_suggestions(
raw_string,
cmdset.get_all_cmd_keys_and_aliases(caller),
cutoff=0.7,
maxnum=3)
if suggestions:
sysarg += _(
" Maybe you meant %s?") % utils.list_to_string(
suggestions, _('or'), addquote=True)
else:
sysarg += _(" Type \"help\" for help.")
raise ExecSystemCommand(syscmd, sysarg)
# Check if this is a Channel-cmd match.
if hasattr(cmd, 'is_channel') and cmd.is_channel:
# even if a user-defined syscmd is not defined, the
# found cmd is already a system command in its own right.
syscmd = yield cmdset.get(CMD_CHANNEL)
if syscmd:
# replace system command with custom version
cmd = syscmd
cmd.session = session
sysarg = "%s:%s" % (cmdname, args)
raise ExecSystemCommand(cmd, sysarg)
# A normal command.
ret = yield _run_command(cmd, cmdname, args,
unformatted_raw_string, cmdset, session,
player)
returnValue(ret)
except ErrorReported as exc:
# this error was already reported, so we
# catch it here and don't pass it on.
logger.log_err("User input was: '%s'." % exc.raw_string)
except ExecSystemCommand as exc:
# Not a normal command: run a system command, if available,
# or fall back to a return string.
syscmd = exc.syscmd
sysarg = exc.sysarg
if syscmd:
ret = yield _run_command(syscmd, syscmd.key, sysarg,
unformatted_raw_string, cmdset,
session, player)
returnValue(ret)
elif sysarg:
# return system arg
error_to.msg(exc.sysarg)
except NoCmdSets:
# Critical error.
logger.log_err("No cmdsets found: %s" % caller)
error_to.msg(_ERROR_NOCMDSETS)
except Exception:
# We should not end up here. If we do, it's a programming bug.
_msg_err(error_to, _ERROR_UNTRAPPED)
except Exception:
# This catches exceptions in cmdhandler exceptions themselves
_msg_err(error_to, _ERROR_CMDHANDLER)
def cmdhandler(called_by, raw_string, _testing=False, callertype="session", session=None, **kwargs):
"""
This is the main mechanism that handles any string sent to the engine.
Args:
called_by (Session, Player or Object): Object from which this
command was called. which this was called from. What this is
depends on the game state.
raw_string (str): The command string as given on the command line.
_testing (bool, optional): Used for debug purposes and decides if we
should actually execute the command or not. If True, the
command instance will be returned.
callertype (str, optional): One of "session", "player" or
"object". These are treated in decending order, so when the
Session is the caller, it will merge its own cmdset into
cmdsets from both Player and eventual puppeted Object (and
cmdsets in its room etc). A Player will only include its own
cmdset and the Objects and so on. Merge order is the same
order, so that Object cmdsets are merged in last, giving them
precendence for same-name and same-prio commands.
session (Session, optional): Relevant if callertype is "player" - the session will help
retrieve the correct cmdsets from puppeted objects.
Kwargs:
kwargs (any): other keyword arguments will be assigned as named variables on the
retrieved command object *before* it is executed. This is unused
in default Evennia but may be used by code to set custom flags or
special operating conditions for a command as it executes.
Returns:
deferred (Deferred): This deferred is fired with the return
value of the command's `func` method. This is not used in
default Evennia.
"""
@inlineCallbacks
def _run_command(cmd, cmdname, args):
"""
Helper function: This initializes and runs the Command
instance once the parser has identified it as either a normal
command or one of the system commands.
Args:
cmd (Command): command object
cmdname (str): name of command
args (str): extra text entered after the identified command
Returns:
deferred (Deferred): this will fire with the return of the
command's `func` method.
Raises:
RuntimeError: If command recursion limit was reached.
"""
global _COMMAND_NESTING
try:
# Assign useful variables to the instance
cmd.caller = caller
cmd.cmdstring = cmdname
cmd.args = args
cmd.cmdset = cmdset
cmd.session = session
cmd.player = player
cmd.raw_string = unformatted_raw_string
#cmd.obj # set via on-object cmdset handler for each command,
# since this may be different for every command when
# merging multuple cmdsets
if hasattr(cmd, 'obj') and hasattr(cmd.obj, 'scripts'):
# cmd.obj is automatically made available by the cmdhandler.
# we make sure to validate its scripts.
yield cmd.obj.scripts.validate()
if _testing:
# only return the command instance
returnValue(cmd)
# assign custom kwargs to found cmd object
for key, val in kwargs.items():
setattr(cmd, key, val)
_COMMAND_NESTING[called_by] += 1
if _COMMAND_NESTING[called_by] > _COMMAND_RECURSION_LIMIT:
err = _ERROR_RECURSION_LIMIT.format(recursion_limit=_COMMAND_RECURSION_LIMIT,
raw_string=unformatted_raw_string,
cmdclass=cmd.__class__)
raise RuntimeError(err)
# pre-command hook
abort = yield cmd.at_pre_cmd()
if abort:
# abort sequence
returnValue(abort)
# Parse and execute
yield cmd.parse()
# main command code
# (return value is normally None)
ret = yield cmd.func()
# post-command hook
yield cmd.at_post_cmd()
if cmd.save_for_next:
# store a reference to this command, possibly
# accessible by the next command.
caller.ndb.last_cmd = yield copy(cmd)
else:
caller.ndb.last_cmd = None
# return result to the deferred
returnValue(ret)
except Exception:
_msg_err(caller, _ERROR_UNTRAPPED)
raise ErrorReported
finally:
_COMMAND_NESTING[called_by] -= 1
raw_string = to_unicode(raw_string, force_string=True)
session, player, obj = session, None, None
if callertype == "session":
session = called_by
player = session.player
obj = session.puppet
elif callertype == "player":
player = called_by
if session:
obj = yield session.puppet
elif callertype == "object":
obj = called_by
else:
raise RuntimeError("cmdhandler: callertype %s is not valid." % callertype)
# the caller will be the one to receive messages and excert its permissions.
# we assign the caller with preference 'bottom up'
caller = obj or player or session
# The error_to is the default recipient for errors. Tries to make sure a player
# does not get spammed for errors while preserving character mirroring.
error_to = obj or session or player
try: # catch bugs in cmdhandler itself
try: # catch special-type commands
cmdset = yield get_and_merge_cmdsets(caller, session, player, obj,
callertype)
if not cmdset:
# this is bad and shouldn't happen.
raise NoCmdSets
unformatted_raw_string = raw_string
raw_string = raw_string.strip()
if not raw_string:
# Empty input. Test for system command instead.
syscmd = yield cmdset.get(CMD_NOINPUT)
sysarg = ""
raise ExecSystemCommand(syscmd, sysarg)
# Parse the input string and match to available cmdset.
# This also checks for permissions, so all commands in match
# are commands the caller is allowed to call.
matches = yield _COMMAND_PARSER(raw_string, cmdset, caller)
# Deal with matches
if len(matches) > 1:
# We have a multiple-match
syscmd = yield cmdset.get(CMD_MULTIMATCH)
sysarg = _("There were multiple matches.")
if syscmd:
# use custom CMD_MULTIMATCH
syscmd.matches = matches
else:
# fall back to default error handling
sysarg = yield _SEARCH_AT_RESULT([match[2] for match in matches], caller, query=match[0])
raise ExecSystemCommand(syscmd, sysarg)
if len(matches) == 1:
# We have a unique command match. But it may still be invalid.
match = matches[0]
cmdname, args, cmd = match[0], match[1], match[2]
if not matches:
# No commands match our entered command
syscmd = yield cmdset.get(CMD_NOMATCH)
if syscmd:
# use custom CMD_NOMATCH command
sysarg = raw_string
else:
# fallback to default error text
sysarg = _("Command '%s' is not available.") % raw_string
suggestions = string_suggestions(raw_string,
cmdset.get_all_cmd_keys_and_aliases(caller),
cutoff=0.7, maxnum=3)
if suggestions:
sysarg += _(" Maybe you meant %s?") % utils.list_to_string(suggestions, _('or'), addquote=True)
else:
sysarg += _(" Type \"help\" for help.")
raise ExecSystemCommand(syscmd, sysarg)
# Check if this is a Channel-cmd match.
if hasattr(cmd, 'is_channel') and cmd.is_channel:
# even if a user-defined syscmd is not defined, the
# found cmd is already a system command in its own right.
syscmd = yield cmdset.get(CMD_CHANNEL)
if syscmd:
# replace system command with custom version
cmd = syscmd
cmd.session = session
sysarg = "%s:%s" % (cmdname, args)
raise ExecSystemCommand(cmd, sysarg)
# A normal command.
ret = yield _run_command(cmd, cmdname, args)
returnValue(ret)
except ErrorReported:
# this error was already reported, so we
# catch it here and don't pass it on.
pass
except ExecSystemCommand as exc:
# Not a normal command: run a system command, if available,
# or fall back to a return string.
syscmd = exc.syscmd
sysarg = exc.sysarg
if syscmd:
ret = yield _run_command(syscmd, syscmd.key, sysarg)
returnValue(ret)
elif sysarg:
# return system arg
error_to.msg(exc.sysarg)
except NoCmdSets:
# Critical error.
logger.log_err("No cmdsets found: %s" % caller)
error_to.msg(_ERROR_NOCMDSETS)
except Exception:
# We should not end up here. If we do, it's a programming bug.
_msg_err(error_to, _ERROR_UNTRAPPED)
except Exception:
# This catches exceptions in cmdhandler exceptions themselves
_msg_err(error_to, _ERROR_CMDHANDLER)
def func(self):
"""
Run the dynamic help entry creator.
"""
query, cmdset = self.args, self.cmdset
caller = self.caller
suggestion_cutoff = self.suggestion_cutoff
suggestion_maxnum = self.suggestion_maxnum
if not query:
query = "all"
# removing doublets in cmdset, caused by cmdhandler
# having to allow doublet commands to manage exits etc.
cmdset.make_unique(caller)
# retrieve all available commands and database topics
all_cmds = [cmd for cmd in cmdset if self.check_show_help(cmd, caller)]
all_topics = [topic for topic in HelpEntry.objects.all() if topic.access(caller, 'view', default=True)]
all_categories = list(set([cmd.help_category.lower() for cmd in all_cmds] + [topic.help_category.lower() for topic in all_topics]))
if query in ("list", "all"):
# we want to list all available help entries, grouped by category
hdict_cmd = defaultdict(list)
hdict_topic = defaultdict(list)
# create the dictionaries {category:[topic, topic ...]} required by format_help_list
# Filter commands that should be reached by the help
# system, but not be displayed in the table.
for cmd in all_cmds:
if self.should_list_cmd(cmd, caller):
hdict_cmd[cmd.help_category].append(cmd.key)
[hdict_topic[topic.help_category].append(topic.key) for topic in all_topics]
# report back
self.msg_help(self.format_help_list(hdict_cmd, hdict_topic))
return
# Try to access a particular command
# build vocabulary of suggestions and rate them by string similarity.
suggestions = None
if suggestion_maxnum > 0:
vocabulary = [cmd.key for cmd in all_cmds if cmd] + [topic.key for topic in all_topics] + all_categories
[vocabulary.extend(cmd.aliases) for cmd in all_cmds]
suggestions = [sugg for sugg in string_suggestions(query, set(vocabulary), cutoff=suggestion_cutoff, maxnum=suggestion_maxnum)
if sugg != query]
if not suggestions:
suggestions = [sugg for sugg in vocabulary if sugg != query and sugg.startswith(query)]
# try an exact command auto-help match
match = [cmd for cmd in all_cmds if cmd == query]
if len(match) == 1:
formatted = self.format_help_entry(match[0].key,
match[0].get_help(caller, cmdset),
aliases=match[0].aliases,
suggested=suggestions)
self.msg_help(formatted)
return
# try an exact database help entry match
match = list(HelpEntry.objects.find_topicmatch(query, exact=True))
if len(match) == 1:
formatted = self.format_help_entry(match[0].key,
match[0].entrytext,
aliases=match[0].aliases.all(),
suggested=suggestions)
self.msg_help(formatted)
return
# try to see if a category name was entered
if query in all_categories:
self.msg_help(self.format_help_list({query:[cmd.key for cmd in all_cmds if cmd.help_category==query]},
{query:[topic.key for topic in all_topics if topic.help_category==query]}))
return
# no exact matches found. Just give suggestions.
self.msg(self.format_help_entry("", "No help entry found for '%s'" % query, None, suggested=suggestions))
def cmdhandler(called_by,
raw_string,
_testing=False,
callertype="session",
sessid=None,
**kwargs):
"""
This is the main function to handle any string sent to the engine.
called_by - object on which this was called from. This is either a Session, a Player or an Object.
raw_string - the command string given on the command line
_testing - if we should actually execute the command or not.
if True, the command instance will be returned instead.
callertype - this is one of "session", "player" or "object", in decending
order. So when the Session is the caller, it will merge its
own cmdset into cmdsets from both Player and eventual puppeted
Object (and cmdsets in its room etc). A Player will only
include its own cmdset and the Objects and so on. Merge order
is the same order, so that Object cmdsets are merged in last,
giving them precendence for same-name and same-prio commands.
sessid - Relevant if callertype is "player" - the session id will help
retrieve the correct cmdsets from puppeted objects.
**kwargs - other keyword arguments will be assigned as named variables on the
retrieved command object *before* it is executed. This is unuesed
in default Evennia but may be used by code to set custom flags or
special operating conditions for a command as it executes.
Note that this function returns a deferred!
"""
@inlineCallbacks
def _run_command(cmd, cmdname, args):
"""
This initializes and runs the Command instance once the parser
has identified it as either a normal command or one of the
system commands.
Args:
cmd (Command): command object
cmdname (str): name of command
args (str): extra text entered after the identified command
Returns:
deferred (Deferred): this will fire when the func() method
returns.
"""
try:
# Assign useful variables to the instance
cmd.caller = caller
cmd.cmdstring = cmdname
cmd.args = args
cmd.cmdset = cmdset
cmd.sessid = session.sessid if session else sessid
cmd.session = session
cmd.player = player
cmd.raw_string = unformatted_raw_string
#cmd.obj # set via on-object cmdset handler for each command,
# since this may be different for every command when
# merging multuple cmdsets
if hasattr(cmd, 'obj') and hasattr(cmd.obj, 'scripts'):
# cmd.obj is automatically made available by the cmdhandler.
# we make sure to validate its scripts.
yield cmd.obj.scripts.validate()
if _testing:
# only return the command instance
returnValue(cmd)
# assign custom kwargs to found cmd object
for key, val in kwargs.items():
setattr(cmd, key, val)
# pre-command hook
abort = yield cmd.at_pre_cmd()
if abort:
# abort sequence
returnValue(abort)
# Parse and execute
yield cmd.parse()
# main command code
# (return value is normally None)
ret = yield cmd.func()
# post-command hook
yield cmd.at_post_cmd()
if cmd.save_for_next:
# store a reference to this command, possibly
# accessible by the next command.
caller.ndb.last_cmd = yield copy(cmd)
else:
caller.ndb.last_cmd = None
# return result to the deferred
returnValue(ret)
except Exception:
logger.log_trace()
_msg_err(caller, _ERROR_UNTRAPPED)
raise ErrorReported
raw_string = to_unicode(raw_string, force_string=True)
session, player, obj = None, None, None
if callertype == "session":
session = called_by
player = session.player
if player:
obj = yield player.get_puppet(session.sessid)
elif callertype == "player":
player = called_by
if sessid:
session = player.get_session(sessid)
obj = yield player.get_puppet(sessid)
elif callertype == "object":
obj = called_by
else:
raise RuntimeError("cmdhandler: callertype %s is not valid." %
callertype)
# the caller will be the one to receive messages and excert its permissions.
# we assign the caller with preference 'bottom up'
caller = obj or player or session
# The error_to is the default recipient for errors. Tries to make sure a player
# does not get spammed for errors while preserving character mirroring.
error_to = obj or session or player
try: # catch bugs in cmdhandler itself
try: # catch special-type commands
cmdset = yield get_and_merge_cmdsets(caller, session, player, obj,
callertype, sessid)
if not cmdset:
# this is bad and shouldn't happen.
raise NoCmdSets
unformatted_raw_string = raw_string
raw_string = raw_string.strip()
if not raw_string:
# Empty input. Test for system command instead.
syscmd = yield cmdset.get(CMD_NOINPUT)
sysarg = ""
raise ExecSystemCommand(syscmd, sysarg)
# Parse the input string and match to available cmdset.
# This also checks for permissions, so all commands in match
# are commands the caller is allowed to call.
matches = yield _COMMAND_PARSER(raw_string, cmdset, caller)
# Deal with matches
if len(matches) > 1:
# We have a multiple-match
syscmd = yield cmdset.get(CMD_MULTIMATCH)
sysarg = _("There were multiple matches.")
if syscmd:
# use custom CMD_MULTIMATCH
syscmd.matches = matches
else:
# fall back to default error handling
sysarg = yield at_multimatch_cmd(caller, matches)
raise ExecSystemCommand(syscmd, sysarg)
if len(matches) == 1:
# We have a unique command match. But it may still be invalid.
match = matches[0]
cmdname, args, cmd = match[0], match[1], match[2]
# check if we allow this type of command
if cmdset.no_channels and hasattr(
cmd, "is_channel") and cmd.is_channel:
matches = []
if cmdset.no_exits and hasattr(cmd, "is_exit") and cmd.is_exit:
matches = []
if not matches:
# No commands match our entered command
syscmd = yield cmdset.get(CMD_NOMATCH)
if syscmd:
# use custom CMD_NOMATCH command
sysarg = raw_string
else:
# fallback to default error text
sysarg = _("Command '%s' is not available.") % raw_string
suggestions = string_suggestions(
raw_string,
cmdset.get_all_cmd_keys_and_aliases(caller),
cutoff=0.7,
maxnum=3)
if suggestions:
sysarg += _(
" Maybe you meant %s?") % utils.list_to_string(
suggestions, _('or'), addquote=True)
else:
sysarg += _(" Type \"help\" for help.")
raise ExecSystemCommand(syscmd, sysarg)
# Check if this is a Channel-cmd match.
if hasattr(cmd, 'is_channel') and cmd.is_channel:
# even if a user-defined syscmd is not defined, the
# found cmd is already a system command in its own right.
syscmd = yield cmdset.get(CMD_CHANNEL)
if syscmd:
# replace system command with custom version
cmd = syscmd
cmd.sessid = session.sessid if session else None
sysarg = "%s:%s" % (cmdname, args)
raise ExecSystemCommand(cmd, sysarg)
# A normal command.
ret = yield _run_command(cmd, cmdname, args)
returnValue(ret)
except ErrorReported:
# this error was already reported, so we
# catch it here and don't pass it on.
pass
except ExecSystemCommand, exc:
# Not a normal command: run a system command, if available,
# or fall back to a return string.
syscmd = exc.syscmd
sysarg = exc.sysarg
if syscmd:
ret = yield _run_command(syscmd, syscmd.key, sysarg)
returnValue(ret)
elif sysarg:
# return system arg
error_to.msg(exc.sysarg, _nomulti=True)
except NoCmdSets:
# Critical error.
logger.log_errmsg("No cmdsets found: %s" % caller)
error_to.msg(_ERROR_NOCMDSETS, _nomulti=True)
except Exception:
# We should not end up here. If we do, it's a programming bug.
logger.log_trace()
_msg_err(error_to, _ERROR_UNTRAPPED)