def test_no_change(self):
s = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s.allow_overwrite = True
s['d'] = {'a': 1, 'b': 2}
s.store()
s2 = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s2.allow_overwrite = True
s2.load_skill_settings_from_file()
self.assertTrue(len(s) == len(s2))
def test_store(self):
s = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s.allow_overwrite = True
s.load_skill_settings_from_file()
s['bool'] = True
s['int'] = 42
s['float'] = 4.2
s['string'] = 'Always carry a towel'
s['list'] = ['batman', 2, True, 'superman']
s.store()
s2 = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s2.allow_overwrite = True
s2.load_skill_settings_from_file()
for key in s:
self.assertEqual(s[key], s2[key])
def test_update_dict(self):
s = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s.allow_overwrite = True
s['d'] = {'a': 1, 'b': 2}
s.store()
s2 = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s2.allow_overwrite = True
s2.load_skill_settings_from_file()
self.assertEqual(s['d'], s2['d'])
# Update dict
s2['d']['c'] = 3
s2.store()
s3 = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s3.allow_overwrite = True
s3.load_skill_settings_from_file()
self.assertEqual(s2['d'], s3['d'])
def test_update_list(self):
s = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s.allow_overwrite = True
s.load_skill_settings_from_file()
s['l'] = ['a', 'b', 'c']
s.store()
s2 = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s2.allow_overwrite = True
s2.load_skill_settings_from_file()
self.assertEqual(s['l'], s2['l'])
# Update list
s2['l'].append('d')
s2.store()
s3 = SkillSettings(join(dirname(__file__), 'settings'),
"test-skill-settings")
s3.allow_overwrite = True
s3.load_skill_settings_from_file()
self.assertEqual(s2['l'], s3['l'])
class OwOSkill(object):
"""
Abstract base class which provides common behaviour and parameters to all
Skills implementation.
"""
def __init__(self, name=None, bus=None):
self.name = name or self.__class__.__name__
# Get directory of skill
self._dir = dirname(abspath(sys.modules[self.__module__].__file__))
self.settings = SkillSettings(self._dir, self.name)
self.bus = None
self.bind(bus)
self.config_core = Configuration.get()
self.config = self.config_core.get(self.name) or {}
self.dialog_renderer = None
self.root_dir = None
self.file_system = FileSystemAccess(join('skills', self.name))
self.registered_intents = []
self.log = LOG.create_logger(self.name)
self.reload_skill = True # allow reloading
self.events = []
self.scheduled_repeats = []
self.skill_id = '' # will be set from the path, so guaranteed unique
self.voc_match_cache = {}
@property
def emitter(self):
""" Backwards compatibility. This is the same as self.bus.
TODO: Remove in 19.02
"""
self.log.warning('self.emitter is deprecated switch to "self.bus"')
return self.bus
@property
def location(self):
""" Get the JSON data struction holding location information. """
# TODO: Allow Enclosure to override this for devices that
# contain a GPS.
return self.config_core.get('location')
@property
def location_pretty(self):
""" Get a more 'human' version of the location as a string. """
loc = self.location
if type(loc) is dict and loc["city"]:
return loc["city"]["name"]
return None
@property
def location_timezone(self):
""" Get the timezone code, such as 'America/Los_Angeles' """
loc = self.location
if type(loc) is dict and loc["timezone"]:
return loc["timezone"]["code"]
return None
@property
def lang(self):
return self.config_core.get('lang')
def bind(self, bus):
""" Register messagebus emitter with skill.
Arguments:
bus: OwO messagebus connection
"""
if bus:
self.bus = bus
self.enclosure = EnclosureAPI(bus, self.name)
self.add_event('owo.stop', self.__handle_stop)
self.add_event('owo.skill.enable_intent',
self.handle_enable_intent)
self.add_event('owo.skill.disable_intent',
self.handle_disable_intent)
name = 'owo.skills.settings.update'
func = self.settings.run_poll
bus.on(name, func)
self.events.append((name, func))
def detach(self):
for (name, intent) in self.registered_intents:
name = str(self.skill_id) + ':' + name
self.bus.emit(Message("detach_intent", {"intent_name": name}))
def initialize(self):
""" Perform any final setup needed for the skill.
Invoked after the skill is fully constructed and registered with the
system.
"""
pass
def get_intro_message(self):
""" Get a message to speak on first load of the skill.
Useful for post-install setup instructions.
Returns:
str: message that will be spoken to the user
"""
return None
def converse(self, utterances, lang="en-us"):
""" Handle conversation.
This method gets a peek at utterances before the normal intent
handling process after a skill has been invoked once.
To use, override the converse() method and return True to
indicate that the utterance has been handled.
Args:
utterances (list): The utterances from the user
lang: language the utterance is in
Returns:
bool: True if an utterance was handled, otherwise False
"""
return False
def __get_response(self):
""" Helper to get a reponse from the user
Returns:
str: user's response or None on a timeout
"""
event = Event()
def converse(utterances, lang="en-us"):
converse.response = utterances[0] if utterances else None
event.set()
return True
# install a temporary conversation handler
self.make_active()
converse.response = None
default_converse = self.converse
self.converse = converse
event.wait(15) # 10 for listener, 5 for SST, then timeout
self.converse = default_converse
return converse.response
def get_response(self,
dialog='',
data=None,
validator=None,
on_fail=None,
num_retries=-1):
"""
Prompt user and wait for response
The given dialog is spoken, followed immediately by listening
for a user response. The response can optionally be
validated before returning.
Example:
color = self.get_response('ask.favorite.color')
Args:
dialog (str): Announcement dialog to speak to the user
data (dict): Data used to render the dialog
validator (any): Function with following signature
def validator(utterance):
return utterance != "red"
on_fail (any): Dialog or function returning literal string
to speak on invalid input. For example:
def on_fail(utterance):
return "nobody likes the color red, pick another"
num_retries (int): Times to ask user for input, -1 for infinite
NOTE: User can not respond and timeout or say "cancel" to stop
Returns:
str: User's reply or None if timed out or canceled
"""
data = data or {}
def get_announcement():
return self.dialog_renderer.render(dialog, data)
if not get_announcement():
raise ValueError('dialog message required')
def on_fail_default(utterance):
fail_data = data.copy()
fail_data['utterance'] = utterance
if on_fail:
return self.dialog_renderer.render(on_fail, fail_data)
else:
return get_announcement()
def is_cancel(utterance):
return self.voc_match(utterance, 'cancel')
def validator_default(utterance):
# accept anything except 'cancel'
return not is_cancel(utterance)
validator = validator or validator_default
on_fail_fn = on_fail if callable(on_fail) else on_fail_default
self.speak(get_announcement(), expect_response=True)
wait_while_speaking()
num_fails = 0
while True:
response = self.__get_response()
if response is None:
# if nothing said, prompt one more time
num_none_fails = 1 if num_retries < 0 else num_retries
if num_fails >= num_none_fails:
return None
else:
if validator(response):
return response
# catch user saying 'cancel'
if is_cancel(response):
return None
num_fails += 1
if 0 < num_retries < num_fails:
return None
line = on_fail_fn(response)
self.speak(line, expect_response=True)
def ask_yesno(self, prompt, data=None):
""" Read prompt and wait for a yes/no answer
This automatically deals with translation and common variants,
such as 'yeah', 'sure', etc.
Args:
prompt (str): a dialog id or string to read
Returns:
string: 'yes', 'no' or whatever the user response if not
one of those, including None
"""
resp = self.get_response(dialog=prompt, data=data)
if self.voc_match(resp, 'yes'):
return 'yes'
if self.voc_match(resp, 'no'):
return 'no'
return resp
def voc_match(self, utt, voc_filename, lang=None):
""" Determine if the given utterance contains the vocabulary provided
Checks for vocabulary match in the utterance instead of the other
way around to allow the user to say things like "yes, please" and
still match against "Yes.voc" containing only "yes". The method first
checks in the current skill's .voc files and secondly the "res/text"
folder of OwO-core. The result is cached to avoid hitting the
disk each time the method is called.
Args:
utt (str): Utterance to be tested
voc_filename (str): Name of vocabulary file (e.g. 'yes' for
'res/text/en-us/yes.voc')
lang (str): Language code, defaults to self.long
Returns:
bool: True if the utterance has the given vocabulary it
"""
lang = lang or self.lang
cache_key = lang + voc_filename
if cache_key not in self.voc_match_cache:
# Check for both skill resources and OwO-core resources
voc = self.find_resource(voc_filename + '.voc', 'vocab')
if not voc:
voc = resolve_resource_file(
join('text', lang, voc_filename + '.voc'))
if not voc or not exists(voc):
raise FileNotFoundError(
'Could not find {}.voc file'.format(voc_filename))
with open(voc) as f:
self.voc_match_cache[cache_key] = f.read().splitlines()
# Check for match
if utt and any(i.strip() in utt
for i in self.voc_match_cache[cache_key]):
return True
return False
def report_metric(self, name, data):
""" Report a skill metric to the OwO servers
Args:
name (str): Name of metric. Must use only letters and hyphens
data (dict): JSON dictionary to report. Must be valid JSON
"""
report_metric(basename(self.root_dir) + ':' + name, data)
def send_email(self, title, body):
""" Send an email to the registered user's email
Args:
title (str): Title of email
body (str): HTML body of email. This supports
simple HTML like bold and italics
"""
DeviceApi().send_email(title, body, basename(self.root_dir))
def make_active(self):
""" Bump skill to active_skill list in intent_service
This enables converse method to be called even without skill being
used in last 5 minutes.
"""
self.bus.emit(
Message('active_skill_request', {"skill_id": self.skill_id}))
def _register_decorated(self):
""" Register all intent handlers that are decorated with an intent.
Looks for all functions that have been marked by a decorator
and read the intent data from them
"""
attributes = [a for a in dir(self) if not a == 'emitter']
for attr_name in attributes:
method = getattr(self, attr_name)
if hasattr(method, 'intents'):
for intent in getattr(method, 'intents'):
self.register_intent(intent, method)
if hasattr(method, 'intent_files'):
for intent_file in getattr(method, 'intent_files'):
self.register_intent_file(intent_file, method)
def translate(self, text, data=None):
""" Load a translatable single string resource
The string is loaded from a file in the skill's dialog subdirectory
'dialog/<lang>/<text>.dialog'
The string is randomly chosen from the file and rendered, replacing
mustache placeholders with values found in the data dictionary.
Args:
text (str): The base filename (no extension needed)
data (dict, optional): a JSON dictionary
Returns:
str: A randomly chosen string from the file
"""
return self.dialog_renderer.render(text, data or {})
def find_resource(self, res_name, old_dirname=None):
""" Find a text resource file
Searches for the given filename in either the old-style directory
(e.g. "<root>/<old_dirname>/<lang>/<res_name>") or somewhere under the
new localization folder "<root>/locale/<lang>/*/<res_name>". The new
method allows arbitrary organization, so the res_name would be found
at "<root>/locale/<lang>/<res_name>", or an arbitrary folder like
"<root>/locale/<lang>/somefolder/<res_name>".
Args:
res_name (string): The resource name to be found
old_dirname (string, optional): Defaults to None. One of the old
resource folders: 'dialog', 'vocab', or 'regex'
Returns:
string: The full path to the resource or None if not found
"""
if old_dirname:
# Try the old directory (dialog/vocab/regex)
path = join(self.root_dir, old_dirname, self.lang, res_name)
if exists(path):
return path
# New scheme: search for res_name under the 'locale' folder
root_path = join(self.root_dir, 'locale', self.lang)
for path, _, files in os.walk(root_path):
if res_name in files:
return join(path, res_name)
# Not found
return None
def translate_namedvalues(self, name, delim=None):
""" Load translation dict containing names and values.
This loads a simple CSV from the 'dialog' folders.
The name is the first list item, the value is the
second. Lines prefixed with # or // get ignored
Args:
name (str): name of the .value file, no extension needed
delim (char): delimiter character used, default is ','
Returns:
dict: name and value dictionary, or empty dict if load fails
"""
delim = delim or ','
result = {}
if not name.endswith(".value"):
name += ".value"
try:
filename = self.find_resource(name, 'dialog')
if filename:
with open(filename) as f:
reader = csv.reader(f, delimiter=delim)
for row in reader:
# skip blank or comment lines
if not row or row[0].startswith("#"):
continue
if len(row) != 2:
continue
result[row[0]] = row[1]
return result
except Exception:
return {}
def translate_template(self, template_name, data=None):
""" Load a translatable template
The strings are loaded from a template file in the skill's dialog
subdirectory.
'dialog/<lang>/<template_name>.template'
The strings are loaded and rendered, replacing mustache placeholders
with values found in the data dictionary.
Args:
template_name (str): The base filename (no extension needed)
data (dict, optional): a JSON dictionary
Returns:
list of str: The loaded template file
"""
return self.__translate_file(template_name + '.template', data)
def translate_list(self, list_name, data=None):
""" Load a list of translatable string resources
The strings are loaded from a list file in the skill's dialog
subdirectory.
'dialog/<lang>/<list_name>.list'
The strings are loaded and rendered, replacing mustache placeholders
with values found in the data dictionary.
Args:
list_name (str): The base filename (no extension needed)
data (dict, optional): a JSON dictionary
Returns:
list of str: The loaded list of strings with items in consistent
positions regardless of the language.
"""
return self.__translate_file(list_name + '.list', data)
def __translate_file(self, name, data):
"""Load and render lines from dialog/<lang>/<name>"""
filename = self.find_resource(name, 'dialog')
if filename:
with open(filename) as f:
text = f.read().replace('{{', '{').replace('}}', '}')
return text.format(**data or {}).split('\n')
else:
return None
def add_event(self, name, handler, handler_info=None, once=False):
""" Create event handler for executing intent
Args:
name (string): IntentParser name
handler (func): Method to call
handler_info (string): Base message when reporting skill event
handler status on messagebus.
once (bool, optional): Event handler will be removed after it has
been run once.
"""
def wrapper(message):
skill_data = {'name': get_handler_name(handler)}
stopwatch = Stopwatch()
try:
message = unmunge_message(message, self.skill_id)
# Indicate that the skill handler is starting
if handler_info:
# Indicate that the skill handler is starting if requested
msg_type = handler_info + '.start'
self.bus.emit(message.reply(msg_type, skill_data))
if once:
# Remove registered one-time handler before invoking,
# allowing them to re-schedule themselves.
self.remove_event(name)
with stopwatch:
if len(signature(handler).parameters) == 0:
handler()
else:
handler(message)
self.settings.store() # Store settings if they've changed
except Exception as e:
# Convert "MyFancySkill" to "My Fancy Skill" for speaking
handler_name = camel_case_split(self.name)
msg_data = {'skill': handler_name}
msg = dialog.get('skill.error', self.lang, msg_data)
self.speak(msg)
LOG.exception(msg)
# append exception information in message
skill_data['exception'] = repr(e)
finally:
# Indicate that the skill handler has completed
if handler_info:
msg_type = handler_info + '.complete'
self.bus.emit(message.reply(msg_type, skill_data))
# Send timing metrics
context = message.context
if context and 'ident' in context:
report_timing(context['ident'], 'skill_handler', stopwatch,
{'handler': handler.__name__})
if handler:
if once:
self.bus.once(name, wrapper)
else:
self.bus.on(name, wrapper)
self.events.append((name, wrapper))
def remove_event(self, name):
""" Removes an event from bus emitter and events list
Args:
name (string): Name of Intent or Scheduler Event
Returns:
bool: True if found and removed, False if not found
"""
removed = False
for _name, _handler in list(self.events):
if name == _name:
try:
self.events.remove((_name, _handler))
except ValueError:
pass
removed = True
# Because of function wrappers, the emitter doesn't always directly
# hold the _handler function, it sometimes holds something like
# 'wrapper(_handler)'. So a call like:
# self.bus.remove(_name, _handler)
# will not find it, leaving an event handler with that name left behind
# waiting to fire if it is ever re-installed and triggered.
# Remove all handlers with the given name, regardless of handler.
if removed:
self.bus.remove_all_listeners(name)
return removed
def register_intent(self, intent_parser, handler):
""" Register an Intent with the intent service.
Args:
intent_parser: Intent or IntentBuilder object to parse
utterance for the handler.
handler (func): function to register with intent
"""
if isinstance(intent_parser, IntentBuilder):
intent_parser = intent_parser.build()
elif not isinstance(intent_parser, Intent):
raise ValueError('"' + str(intent_parser) + '" is not an Intent')
# Default to the handler's function name if none given
name = intent_parser.name or handler.__name__
munge_intent_parser(intent_parser, name, self.skill_id)
self.bus.emit(Message("register_intent", intent_parser.__dict__))
self.registered_intents.append((name, intent_parser))
self.add_event(intent_parser.name, handler, 'owo.skill.handler')
def register_intent_file(self, intent_file, handler):
"""
Register an Intent file with the intent service.
For example:
=== food.order.intent ===
Order some {food}.
Order some {food} from {place}.
I'm hungry.
Grab some {food} from {place}.
Optionally, you can also use <register_entity_file>
to specify some examples of {food} and {place}
In addition, instead of writing out multiple variations
of the same sentence you can write:
=== food.order.intent ===
(Order | Grab) some {food} (from {place} | ).
I'm hungry.
Args:
intent_file: name of file that contains example queries
that should activate the intent. Must end with
'.intent'
handler: function to register with intent
"""
name = str(self.skill_id) + ':' + intent_file
filename = self.find_resource(intent_file, 'vocab')
if not filename:
raise ValueError('Unable to find "' + str(intent_file) + '"')
data = {"file_name": filename, "name": name}
self.bus.emit(Message("padatious:register_intent", data))
self.registered_intents.append((intent_file, data))
self.add_event(name, handler, 'owo.skill.handler')
def register_entity_file(self, entity_file):
""" Register an Entity file with the intent service.
An Entity file lists the exact values that an entity can hold.
For example:
=== ask.day.intent ===
Is it {weekend}?
=== weekend.entity ===
Saturday
Sunday
Args:
entity_file (string): name of file that contains examples of an
entity. Must end with '.entity'
"""
if entity_file.endswith('.entity'):
entity_file = entity_file.replace('.entity', '')
filename = self.find_resource(entity_file + ".entity", 'vocab')
if not filename:
raise ValueError('Unable to find "' + entity_file + '.entity"')
name = str(self.skill_id) + ':' + entity_file
self.bus.emit(
Message("padatious:register_entity", {
"file_name": filename,
"name": name
}))
def handle_enable_intent(self, message):
"""
Listener to enable a registered intent if it belongs to this skill
"""
intent_name = message.data["intent_name"]
for (name, intent) in self.registered_intents:
if name == intent_name:
return self.enable_intent(intent_name)
def handle_disable_intent(self, message):
"""
Listener to disable a registered intent if it belongs to this skill
"""
intent_name = message.data["intent_name"]
for (name, intent) in self.registered_intents:
if name == intent_name:
return self.disable_intent(intent_name)
def disable_intent(self, intent_name):
"""
Disable a registered intent if it belongs to this skill
Args:
intent_name (string): name of the intent to be disabled
Returns:
bool: True if disabled, False if it wasn't registered
"""
names = [intent_tuple[0] for intent_tuple in self.registered_intents]
if intent_name in names:
LOG.debug('Disabling intent ' + intent_name)
name = str(self.skill_id) + ':' + intent_name
self.bus.emit(Message("detach_intent", {"intent_name": name}))
return True
LOG.error('Could not disable ' + intent_name +
', it hasn\'t been registered.')
return False
def enable_intent(self, intent_name):
"""
(Re)Enable a registered intent if it belongs to this skill
Args:
intent_name: name of the intent to be enabled
Returns:
bool: True if enabled, False if it wasn't registered
"""
names = [intent[0] for intent in self.registered_intents]
intents = [intent[1] for intent in self.registered_intents]
if intent_name in names:
intent = intents[names.index(intent_name)]
self.registered_intents.remove((intent_name, intent))
if ".intent" in intent_name:
self.register_intent_file(intent_name, None)
else:
intent.name = intent_name
self.register_intent(intent, None)
LOG.debug('Enabling intent ' + intent_name)
return True
LOG.error('Could not enable ' + intent_name + ', it hasn\'t been '
'registered.')
return False
def set_context(self, context, word=''):
"""
Add context to intent service
Args:
context: Keyword
word: word connected to keyword
"""
if not isinstance(context, str):
raise ValueError('context should be a string')
if not isinstance(word, str):
raise ValueError('word should be a string')
context = to_alnum(self.skill_id) + context
self.bus.emit(
Message('add_context', {
'context': context,
'word': word
}))
def remove_context(self, context):
"""
remove_context removes a keyword from from the context manager.
"""
if not isinstance(context, str):
raise ValueError('context should be a string')
self.bus.emit(Message('remove_context', {'context': context}))
def register_vocabulary(self, entity, entity_type):
""" Register a word to a keyword
Args:
entity: word to register
entity_type: Intent handler entity to tie the word to
"""
self.bus.emit(
Message('register_vocab', {
'start': entity,
'end': to_alnum(self.skill_id) + entity_type
}))
def register_regex(self, regex_str):
""" Register a new regex.
Args:
regex_str: Regex string
"""
regex = munge_regex(regex_str, self.skill_id)
re.compile(regex) # validate regex
self.bus.emit(Message('register_vocab', {'regex': regex}))
def speak(self, utterance, expect_response=False):
""" Speak a sentence.
Args:
utterance (str): sentence OwO should speak
expect_response (bool): set to True if OwO should listen
for a response immediately after
speaking the utterance.
"""
# registers the skill as being active
self.enclosure.register(self.name)
data = {'utterance': utterance, 'expect_response': expect_response}
message = dig_for_message()
if message:
self.bus.emit(message.reply("speak", data))
else:
self.bus.emit(Message("speak", data))
def speak_dialog(self, key, data=None, expect_response=False):
""" Speak a random sentence from a dialog file.
Args:
key (str): dialog file key (filename without extension)
data (dict): information used to populate sentence
expect_response (bool): set to True if OwO should listen
for a response immediately after
speaking the utterance.
"""
data = data or {}
self.speak(self.dialog_renderer.render(key, data), expect_response)
def init_dialog(self, root_directory):
# If "<skill>/dialog/<lang>" exists, load from there. Otherwise
# load dialog from "<skill>/locale/<lang>"
dialog_dir = join(root_directory, 'dialog', self.lang)
if exists(dialog_dir):
self.dialog_renderer = DialogLoader().load(dialog_dir)
elif exists(join(root_directory, 'locale', self.lang)):
locale_path = join(root_directory, 'locale', self.lang)
self.dialog_renderer = DialogLoader().load(locale_path)
else:
LOG.debug('No dialog loaded')
def load_data_files(self, root_directory):
self.root_dir = root_directory
self.init_dialog(root_directory)
self.load_vocab_files(root_directory)
self.load_regex_files(root_directory)
def load_vocab_files(self, root_directory):
vocab_dir = join(root_directory, 'vocab', self.lang)
if exists(vocab_dir):
load_vocabulary(vocab_dir, self.bus, self.skill_id)
elif exists(join(root_directory, 'locale', self.lang)):
load_vocabulary(join(root_directory, 'locale', self.lang),
self.bus, self.skill_id)
else:
LOG.debug('No vocab loaded')
def load_regex_files(self, root_directory):
regex_dir = join(root_directory, 'regex', self.lang)
if exists(regex_dir):
load_regex(regex_dir, self.bus, self.skill_id)
elif exists(join(root_directory, 'locale', self.lang)):
load_regex(join(root_directory, 'locale', self.lang), self.bus,
self.skill_id)
def __handle_stop(self, event):
"""
Handler for the "owo.stop" signal. Runs the user defined
`stop()` method.
"""
def __stop_timeout():
# The self.stop() call took more than 100ms, assume it handled Stop
self.bus.emit(
Message("owo.stop.handled",
{"skill_id": str(self.skill_id) + ":"}))
timer = Timer(0.1, __stop_timeout) # set timer for 100ms
try:
if self.stop():
self.bus.emit(
Message("owo.stop.handled",
{"by": "skill:" + str(self.skill_id)}))
timer.cancel()
except:
timer.cancel()
LOG.error("Failed to stop skill: {}".format(self.name),
exc_info=True)
@abc.abstractmethod
def stop(self):
pass
def shutdown(self):
"""
This method is intended to be called during the skill
process termination. The skill implementation must
shutdown all processes and operations in execution.
"""
pass
def default_shutdown(self):
"""Parent function called internally to shut down everything.
Shuts down known entities and calls skill specific shutdown method.
"""
try:
self.shutdown()
except Exception as e:
LOG.error('Skill specific shutdown function encountered '
'an error: {}'.format(repr(e)))
# Store settings
if exists(self._dir):
self.settings.store()
self.settings.stop_polling()
# removing events
self.cancel_all_repeating_events()
for e, f in self.events:
self.bus.remove(e, f)
self.events = [] # Remove reference to wrappers
self.bus.emit(
Message("detach_skill", {"skill_id": str(self.skill_id) + ":"}))
try:
self.stop()
except:
LOG.error("Failed to stop skill: {}".format(self.name),
exc_info=True)
def _unique_name(self, name):
"""
Return a name unique to this skill using the format
[skill_id]:[name].
Args:
name: Name to use internally
Returns:
str: name unique to this skill
"""
return str(self.skill_id) + ':' + (name or '')
def _schedule_event(self,
handler,
when,
data=None,
name=None,
repeat=None):
"""
Underlying method for schedule_event and schedule_repeating_event.
Takes scheduling information and sends it off on the message bus.
"""
if not name:
name = self.name + handler.__name__
unique_name = self._unique_name(name)
if repeat:
self.scheduled_repeats.append(name) # store "friendly name"
data = data or {}
self.add_event(unique_name, handler, once=not repeat)
event_data = {}
event_data['time'] = time.mktime(when.timetuple())
event_data['event'] = unique_name
event_data['repeat'] = repeat
event_data['data'] = data
self.bus.emit(Message('owo.scheduler.schedule_event', data=event_data))
def schedule_event(self, handler, when, data=None, name=None):
"""
Schedule a single event.
Args:
handler: method to be called
when (datetime): when the handler should be called
(local time)
data (dict, optional): data to send when the handler is called
name (str, optional): friendly name parameter
"""
data = data or {}
self._schedule_event(handler, when, data, name)
def schedule_repeating_event(self,
handler,
when,
frequency,
data=None,
name=None):
"""
Schedule a repeating event.
Args:
handler: method to be called
when (datetime): time for calling the handler or None
to initially trigger <frequency>
seconds from now
frequency (float/int): time in seconds between calls
data (dict, optional): data to send along to the handler
name (str, optional): friendly name parameter
"""
# Do not schedule if this event is already scheduled by the skill
if name not in self.scheduled_repeats:
data = data or {}
if not when:
when = datetime.now() + timedelta(seconds=frequency)
self._schedule_event(handler, when, data, name, frequency)
else:
LOG.debug('The event is already scheduled, cancel previous '
'event if this scheduling should replace the last.')
def update_scheduled_event(self, name, data=None):
"""
Change data of event.
Args:
name (str): Name of event
"""
data = data or {}
data = {'event': self._unique_name(name), 'data': data}
self.bus.emit(Message('owo.schedule.update_event', data=data))
def cancel_scheduled_event(self, name):
"""
Cancel a pending event. The event will no longer be scheduled
to be executed
Args:
name (str): Name of event
"""
unique_name = self._unique_name(name)
data = {'event': unique_name}
if name in self.scheduled_repeats:
self.scheduled_repeats.remove(name)
if self.remove_event(unique_name):
self.bus.emit(Message('owo.scheduler.remove_event', data=data))
def get_scheduled_event_status(self, name):
"""
Get scheduled event data and return the amount of time left
Args:
name (str): Name of event
Return:
int: the time left in seconds
"""
event_name = self._unique_name(name)
data = {'name': event_name}
# making event_status an object so it's refrence can be changed
event_status = [None]
finished_callback = [False]
def callback(message):
if message.data is not None:
event_time = int(message.data[0][0])
current_time = int(time.time())
time_left_in_seconds = event_time - current_time
event_status[0] = time_left_in_seconds
finished_callback[0] = True
emitter_name = 'owo.event_status.callback.{}'.format(event_name)
self.bus.once(emitter_name, callback)
self.bus.emit(Message('owo.scheduler.get_event', data=data))
start_wait = time.time()
while finished_callback[0] is False and time.time() - start_wait < 3.0:
time.sleep(0.1)
if time.time() - start_wait > 3.0:
raise Exception("Event Status Messagebus Timeout")
return event_status[0]
def cancel_all_repeating_events(self):
""" Cancel any repeating events started by the skill. """
# NOTE: Gotta make a copy of the list due to the removes that happen
# in cancel_scheduled_event().
for e in list(self.scheduled_repeats):
self.cancel_scheduled_event(e)