mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-11-10 01:17:42 +01:00
152 lines
4.4 KiB
Python
152 lines
4.4 KiB
Python
import inspect
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import logging
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import asyncio
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class EventBus(object):
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class Node(object):
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__slots__ = '_children', '_content'
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def __init__(self):
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self._children = {}
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self._content = None
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class Content(object):
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def __init__(self, parent, topic, method, once):
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self.parent = parent
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self.method = method
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self.name = method.__name__
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self.once = once
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self.topic = topic
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def register(self, topic, method, once=False):
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print("REGISTER", topic, method)
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if method in self.registry:
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raise RuntimeError("Method %s already registerd. Please unregister first!" % method.__name__)
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self.logger.info("Topic %s", topic)
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node = self._root
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for sym in topic.split('/'):
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node = node._children.setdefault(sym, self.Node())
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if not isinstance(node._content, list):
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node._content = []
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c = self.Content(node, topic, method, once)
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node._content.append(c)
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print(c, node._content, topic)
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self.registry[method] = c
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def get_callbacks(self, key):
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try:
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node = self._root
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for sym in key.split('/'):
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node = node._children[sym]
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if node._content is None:
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raise KeyError(key)
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return node._content
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except KeyError:
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raise KeyError(key)
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def unregister(self, method):
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self.logger.info("Unregister %s", method.__name__)
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if method in self.registry:
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content = self.registry[method]
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clean_idx = None
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for idx, content_obj in enumerate(content.parent._content):
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if method == content_obj.method:
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clean_idx = idx
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break
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if clean_idx is not None:
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del content.parent._content[clean_idx]
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'''
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def unregister(self, key, method):
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lst = []
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try:
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parent, node = None, self._root
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for k in key.split('/'):
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parent, node = node, node._children[k]
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lst.append((parent, k, node))
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except KeyError:
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raise KeyError(key)
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else: # cleanup
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for parent, k, node in reversed(lst):
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if node._children or node._content is not None:
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break
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del parent._children[k]
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'''
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def __init__(self, cbpi):
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self.logger = logging.getLogger(__name__)
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self._root = self.Node()
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self.registry = {}
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self.docs = {}
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self.cbpi = cbpi
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def fire(self, topic: str, **kwargs) -> None:
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print("#### FIRE", topic)
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self.logger.info("EMIT EVENT %s", topic)
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cleanup_methods = []
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for content_array in self.iter_match(topic):
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print(content_array)
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cleanup = []
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for idx, content_obj in enumerate(content_array):
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print("#################")
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print("TOPIC", content_obj.method, content_obj.topic)
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print("#################")
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if inspect.iscoroutinefunction(content_obj.method):
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self.cbpi.app.loop.create_task(content_obj.method(**kwargs, topic = topic))
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else:
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content_obj.method(**kwargs, topic = topic)
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if content_obj.once is True:
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cleanup.append(idx)
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for idx in cleanup:
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del content_array[idx]
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print(self._root)
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print("#### FIRE END ######")
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def iter_match(self, topic):
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lst = topic.split('/')
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normal = not topic.startswith('$')
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def rec(node, i=0):
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if i == len(lst):
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if node._content is not None:
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yield node._content
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else:
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part = lst[i]
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if part in node._children:
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for content in rec(node._children[part], i + 1):
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yield content
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if '+' in node._children and (normal or i > 0):
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for content in rec(node._children['+'], i + 1):
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yield content
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if '#' in node._children and (normal or i > 0):
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content = node._children['#']._content
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if content is not None:
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yield content
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return rec(self._root)
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