Added entities plugin to query/action entities

This commit is contained in:
Fabio Manganiello 2022-04-07 00:22:54 +02:00
parent 2eeb1d4fea
commit 3b4f7d3dad
Signed by: blacklight
GPG Key ID: D90FBA7F76362774
2 changed files with 135 additions and 0 deletions

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from queue import Queue, Empty
from threading import Thread
from time import time
from typing import Optional
from platypush.context import get_plugin
from platypush.entities import get_plugin_entity_registry, get_entities_registry
from platypush.plugins import Plugin, action
class EntitiesPlugin(Plugin):
"""
This plugin is used to interact with native platform entities (e.g. switches, lights,
sensors etc.) through a consistent interface, regardless of the integration type.
"""
def __init__(self, **kwargs):
super().__init__(**kwargs)
@action
def get(self, type: str = 'entity', **filter):
"""
Retrieve a list of entities.
:param type: Entity type, as specified by the (lowercase) class name and table name.
Default: `entity` (retrieve all the types)
:param filter: Filter entities with these criteria (e.g. `name`, `id`,
`state`, `plugin` etc.)
"""
entity_registry = get_entities_registry()
all_types = {e.__tablename__.lower(): e for e in entity_registry}
entity_type = all_types.get(type.lower())
assert (
entity_type
), f'No such entity type: {type}. Supported types: {list(all_types.keys())}'
db = get_plugin('db')
assert db
with db.get_session() as session:
query = session.query(entity_type)
if filter:
query = query.filter_by(**filter)
return [e.to_json() for e in query.all()]
@action
def scan(
self,
type: Optional[str] = None,
plugin: Optional[str] = None,
timeout: Optional[float] = 30.0,
):
"""
(Re-)scan entities and return the updated results.
:param type: Filter by entity type (e.g. `switch`, `light`, `sensor` etc.). Default: all.
:param plugin: Filter by plugin name (e.g. `switch.tplink` or `light.hue`). Default: all.
:param timeout: Scan timeout in seconds. Default: 30.
"""
filter = {}
plugin_registry = get_plugin_entity_registry()
if plugin:
filter['plugin'] = plugin
plugin_registry['by_plugin'] = {
**(
{plugin: plugin_registry['by_plugin'][plugin]}
if plugin in plugin_registry['by_plugin']
else {}
)
}
if type:
filter['type'] = type
filter_plugins = set(plugin_registry['by_entity_type'].get(type, []))
plugin_registry['by_plugin'] = {
plugin_name: entity_types
for plugin_name, entity_types in plugin_registry['by_plugin'].items()
if plugin_name in filter_plugins
}
enabled_plugins = plugin_registry['by_plugin'].keys()
def worker(plugin_name: str, q: Queue):
try:
plugin = get_plugin(plugin_name)
assert plugin, f'No such configured plugin: {plugin_name}'
# Force a plugin scan by calling the `status` action
response = plugin.status()
assert not response.errors, response.errors
q.put((plugin_name, response.output))
except Exception as e:
q.put((plugin_name, e))
q = Queue()
start_time = time()
results = []
workers = [
Thread(target=worker, args=(plugin_name, q))
for plugin_name in enabled_plugins
]
for w in workers:
w.start()
while len(results) < len(workers) and (
not timeout or (time() - start_time < timeout)
):
try:
plugin_name, result = q.get(block=True, timeout=0.5)
if isinstance(result, Exception):
self.logger.warning(
f'Could not load results from plugin {plugin_name}: {result}'
)
else:
results.append(result)
except Empty:
continue
if len(results) < len(workers):
self.logger.warning('Scan timed out for some plugins')
for w in workers:
w.join(timeout=max(0, timeout - (time() - start_time)) if timeout else None)
return self.get(**filter)
# vim:sw=4:ts=4:et:

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manifest:
events: {}
package: platypush.plugins.entities
type: plugin