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# SPDX-License-Identifier: Apache-2.0
#
# Copyright (c) 2023 Malik Talha
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import time
import json
import threading
from kuksa_client import KuksaClientThread
from agl_service_voiceagent.utils.config import get_config_value
class KuksaInterface:
"""
Kuksa Interface
This class provides methods to initialize, authorize, connect, send values,
check the status, and close the Kuksa client.
"""
_instance = None
_lock = threading.Lock()
def __new__(cls):
"""
Get the unique instance of the class.
Returns:
KuksaInterface: The instance of the class.
"""
with cls._lock:
if cls._instance is None:
cls._instance = super(KuksaInterface, cls).__new__(cls)
cls._instance.init_client()
return cls._instance
def init_client(self):
"""
Initialize the Kuksa client configuration.
"""
# get config values
self.ip = str(get_config_value("ip", "Kuksa"))
self.port = str(get_config_value("port", "Kuksa"))
self.insecure = get_config_value("insecure", "Kuksa")
self.protocol = get_config_value("protocol", "Kuksa")
self.token = get_config_value("token", "Kuksa")
print(self.ip, self.port, self.insecure, self.protocol, self.token)
# define class methods
self.kuksa_client = None
def get_kuksa_client(self):
"""
Get the Kuksa client instance.
Returns:
KuksaClientThread: The Kuksa client instance.
"""
return self.kuksa_client
def get_kuksa_status(self):
"""
Check the status of the Kuksa client connection.
Returns:
bool: True if the client is connected, False otherwise.
"""
if self.kuksa_client:
return self.kuksa_client.checkConnection()
return False
def connect_kuksa_client(self):
"""
Connect and start the Kuksa client.
"""
try:
with self._lock:
if self.kuksa_client is None:
self.kuksa_client = KuksaClientThread({
"ip": self.ip,
"port": self.port,
"insecure": self.insecure,
"protocol": self.protocol,
})
self.kuksa_client.start()
time.sleep(2) # Give the thread time to start
if not self.get_kuksa_status():
print("[-] Error: Connection to Kuksa server failed.")
else:
print("[+] Connection to Kuksa established.")
except Exception as e:
print("[-] Error: Connection to Kuksa server failed. ", str(e))
def authorize_kuksa_client(self):
"""
Authorize the Kuksa client with the provided token.
"""
if self.kuksa_client:
response = self.kuksa_client.authorize(self.token)
response = json.loads(response)
if "error" in response:
error_message = response.get("error", "Unknown error")
print(f"[-] Error: Authorization failed. {error_message}")
else:
print("[+] Kuksa client authorized successfully.")
else:
print("[-] Error: Kuksa client is not initialized. Call `connect_kuksa_client` first.")
def send_values(self, path=None, value=None):
"""
Send values to the Kuksa server.
Args:
path (str): The path to the value.
value (str): The value to be sent.
Returns:
bool: True if the value was set, False otherwise.
"""
result = False
if self.kuksa_client is None:
print("[-] Error: Kuksa client is not initialized.")
return
if self.get_kuksa_status():
try:
response = self.kuksa_client.setValue(path, value)
response = json.loads(response)
if not "error" in response:
print(f"[+] Value '{value}' sent to Kuksa successfully.")
result = True
else:
error_message = response.get("error", "Unknown error")
print(f"[-] Error: Failed to send value '{value}' to Kuksa. {error_message}")
except Exception as e:
print("[-] Error: Failed to send values to Kuksa. ", str(e))
else:
print("[-] Error: Connection to Kuksa failed.")
return result
def get_value(self, path=None):
"""
Get values from the Kuksa server.
Args:
path (str): The path to the value.
Returns:
str: The value if the path is valid, None otherwise.
"""
result = None
if self.kuksa_client is None:
print("[-] Error: Kuksa client is not initialized.")
return
if self.get_kuksa_status():
try:
response = self.kuksa_client.getValue(path)
response = json.loads(response)
if not "error" in response:
result = response.get("data", None)
result = result.get("dp", None)
result = result.get("value", None)
else:
error_message = response.get("error", "Unknown error")
print(f"[-] Error: Failed to get value from Kuksa. {error_message}")
except Exception as e:
print("[-] Error: Failed to get values from Kuksa. ", str(e))
else:
print("[-] Error: Connection to Kuksa failed.")
return result
def close_kuksa_client(self):
"""
Close and stop the Kuksa client.
"""
try:
with self._lock:
if self.kuksa_client:
self.kuksa_client.stop()
self.kuksa_client = None
print("[+] Kuksa client stopped.")
except Exception as e:
print("[-] Error: Failed to close Kuksa client. ", str(e))
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