108 lines
3.3 KiB
Python
108 lines
3.3 KiB
Python
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"""Support for Node-RED discovery."""
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import asyncio
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import logging
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from homeassistant.helpers.dispatcher import (
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async_dispatcher_connect,
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async_dispatcher_send,
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)
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from homeassistant.helpers.typing import HomeAssistantType
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from .const import (
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CONF_BINARY_SENSOR,
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CONF_COMPONENT,
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CONF_NODE_ID,
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CONF_REMOVE,
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CONF_SENSOR,
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CONF_SERVER_ID,
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CONF_SWITCH,
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DOMAIN,
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DOMAIN_DATA,
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NODERED_DISCOVERY,
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NODERED_DISCOVERY_NEW,
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NODERED_DISCOVERY_UPDATED,
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)
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SUPPORTED_COMPONENTS = [
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CONF_SWITCH,
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CONF_BINARY_SENSOR,
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CONF_SENSOR,
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]
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_LOGGER = logging.getLogger(__name__)
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ALREADY_DISCOVERED = "discovered_components"
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CHANGE_ENTITY_TYPE = "change_entity_type"
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CONFIG_ENTRY_LOCK = "config_entry_lock"
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CONFIG_ENTRY_IS_SETUP = "config_entry_is_setup"
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DISCOVERY_DISPATCHED = "discovery_dispatched"
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async def start_discovery(
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hass: HomeAssistantType, hass_config, config_entry=None
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) -> bool:
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"""Initialize of Node-RED Discovery."""
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async def async_device_message_received(msg, connection):
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"""Process the received message."""
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component = msg[CONF_COMPONENT]
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server_id = msg[CONF_SERVER_ID]
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node_id = msg[CONF_NODE_ID]
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if component not in SUPPORTED_COMPONENTS:
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_LOGGER.warning(f"Integration {component} is not supported")
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return
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discovery_hash = f"{DOMAIN}-{server_id}-{node_id}"
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data = hass.data[DOMAIN_DATA]
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_LOGGER.debug(f"Discovery message: {msg}")
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if ALREADY_DISCOVERED not in data:
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data[ALREADY_DISCOVERED] = {}
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if discovery_hash in data[ALREADY_DISCOVERED]:
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if data[ALREADY_DISCOVERED][discovery_hash] != component:
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# Remove old
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log_text = f"Changing {data[ALREADY_DISCOVERED][discovery_hash]} to"
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msg[CONF_REMOVE] = CHANGE_ENTITY_TYPE
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elif CONF_REMOVE in msg:
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log_text = "Removing"
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else:
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# Dispatch update
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log_text = "Updating"
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_LOGGER.info(f"{log_text} {component} {server_id} {node_id}")
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data[ALREADY_DISCOVERED][discovery_hash] = component
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async_dispatcher_send(
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hass, NODERED_DISCOVERY_UPDATED.format(discovery_hash), msg, connection
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)
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else:
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# Add component
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_LOGGER.info(f"Creating {component} {server_id} {node_id}")
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data[ALREADY_DISCOVERED][discovery_hash] = component
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async with data[CONFIG_ENTRY_LOCK]:
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if component not in data[CONFIG_ENTRY_IS_SETUP]:
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await hass.config_entries.async_forward_entry_setup(
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config_entry, component
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)
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data[CONFIG_ENTRY_IS_SETUP].add(component)
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async_dispatcher_send(
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hass, NODERED_DISCOVERY_NEW.format(component), msg, connection
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)
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hass.data[DOMAIN_DATA][CONFIG_ENTRY_LOCK] = asyncio.Lock()
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hass.data[DOMAIN_DATA][CONFIG_ENTRY_IS_SETUP] = set()
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hass.data[DOMAIN_DATA][DISCOVERY_DISPATCHED] = async_dispatcher_connect(
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hass, NODERED_DISCOVERY, async_device_message_received,
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)
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def stop_discovery(hass: HomeAssistantType):
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"""Remove discovery dispatcher."""
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hass.data[DOMAIN_DATA][DISCOVERY_DISPATCHED]()
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