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event_player.py
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event_player.py
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"""Event Config Player."""
from copy import deepcopy
from mpf.core.placeholder_manager import TextTemplate
from mpf.config_players.flat_config_player import FlatConfigPlayer
from mpf.core.delays import DelayManager
from mpf.core.utility_functions import Util
class EventPlayer(FlatConfigPlayer):
"""Posts events based on config."""
config_file_section = 'event_player'
show_section = 'events'
__slots__ = ["delay"]
def __init__(self, machine):
"""Initialize EventPlayer."""
super().__init__(machine)
self.delay = DelayManager(self.machine)
def play(self, settings, context, calling_context, priority=0, **kwargs):
"""Post (delayed) events."""
for event, event_configs in settings.items():
for s in event_configs:
if s["condition"] and not s["condition"].evaluate(kwargs):
continue
if s["number"] is not None:
self.delay.add(callback=self._post_event, ms=s["number"],
event=event, priority=s["priority"], params=s["params"], **kwargs)
else:
self._post_event(event, s["priority"], s["params"], **kwargs)
# pylint: disable-msg=too-many-arguments
def handle_subscription_change(self, value, settings, priority, context, key):
"""Handle subscriptions."""
instance_dict = self._get_instance_dict(context)
previous_value = instance_dict.get(key, None)
if previous_value == value:
return
instance_dict[key] = value
if not value:
return
for event, event_configs in settings.items():
for s in event_configs:
if s["condition"] and not s["condition"].evaluate({}):
continue
if s["number"] is not None:
self.delay.add(callback=self._post_event, ms=s["number"],
event=event, priority=s["priority"], params=s["params"])
else:
self._post_event(event, s["priority"], s["params"])
def _post_event(self, event, priority, params, **kwargs):
if "(" in event:
# TODO: move this to parsing time
event_name_placeholder = TextTemplate(self.machine, event.replace("(", "{").replace(")", "}"))
event = event_name_placeholder.evaluate(kwargs)
for key, param in params.items():
if isinstance(param, dict):
params = deepcopy(params)
# TODO: move this to parsing time
params[key] = self._evaluate_event_param(param, kwargs)
self.machine.events.post(event, priority=priority, **params)
def validate_config_entry(self, settings, name):
"""Validate player and expand placeholders."""
config = super().validate_config_entry(settings, name)
final_config = {}
for event, s in config.items():
if "(" in event:
if event not in final_config:
final_config[event] = []
final_config[event].append({
"condition": None,
"number": None,
"priority": s["priority"],
"params": {k: v for k, v in s.items() if k != "priority"}
})
else:
var = self._parse_and_validate_conditional(event, name)
if var.name not in final_config:
final_config[var.name] = []
final_config[var.name].append({
"condition": var.condition,
"number": Util.string_to_ms(var.number) if var.number else None,
"priority": s["priority"],
"params": {k: v for k, v in s.items() if k != "priority"}
})
return final_config
def _evaluate_event_param(self, param, kwargs):
if param.get("type") == "float":
placeholder = self.machine.placeholder_manager.build_float_template(param["value"])
elif param.get("type") == "int":
placeholder = self.machine.placeholder_manager.build_int_template(param["value"])
elif param.get("type") == "bool":
placeholder = self.machine.placeholder_manager.build_bool_template(param["value"])
else:
placeholder = self.machine.placeholder_manager.build_string_template(param["value"])
return placeholder.evaluate(kwargs)
def get_list_config(self, value):
"""Parse list."""
result = {}
for event in value:
result[event] = {}
return result
def get_express_config(self, value):
"""Parse short config."""
return self.get_list_config(Util.string_to_event_list(value))