def __init__(self,
credential_path,
database_url="https://ledypie.firebaseio.com/",
debug=False,
tracker=None,
thread_name="FireBaseConnectorThread"):
"""
:param credential_path: str, path to the firebase credential json file
:param database_url: str, URL of the firebase
:param debug: bool, set to true to allow debug output
:param tracker: func, function to be called when the database has been updated with new values
"""
# init thread class
super().__init__(name=thread_name)
# define local attributes
self.tracker = tracker if tracker is not None else lambda: None
self.stop = False
self.rgba = None
self.random_colors = False
self.local_db = None
if debug:
fire_logger.setLevel(logging.DEBUG)
# connect to firebase
cred = credentials.Certificate(credential_path)
try:
firebase_admin.initialize_app(
credential=cred,
options={'databaseURL': database_url},
)
except ValueError:
firebase_admin.initialize_app(
credential=cred,
options={'databaseURL': database_url},
name=socket.gethostname())
# update db and get references
self.root = db.reference('/')
self.init_db()
self.db_refs = dict(pattern_attributes={
pt: db.reference(f"/pattern_attributes/{pt}")
for pt in Patterns.keys()
},
cur_pattern=db.reference('/cur_pattern'),
rate=db.reference('/rate'),
RGBA=db.reference('/RGBA'))
# add listener and sleep to wait for the first call where self.local_db is initialized
self.listener = self.root.listen(self.listener_method)
time.sleep(1)
fire_logger.debug("FireBaseConnector initialized")
