FreeDATA/modem/message_p2p.py
2024-01-27 12:07:07 +01:00

82 lines
3 KiB
Python

import datetime
import api_validations
import base64
import json
from message_system_db_manager import DatabaseManager
def message_received(event_manager, data):
decompressed_json_string = data.decode('utf-8')
received_message_obj = MessageP2P.from_payload(decompressed_json_string)
received_message_dict = MessageP2P.to_dict(received_message_obj, received=True)
DatabaseManager(event_manager).add_message(received_message_dict)
class MessageP2P:
def __init__(self, origin: str, destination: str, body: str, attachments: list) -> None:
self.timestamp = datetime.datetime.now().isoformat()
self.origin = origin
self.destination = destination
self.body = body
self.attachments = attachments
@classmethod
def from_api_params(cls, origin: str, params: dict):
dxcall = params['dxcall']
if not api_validations.validate_freedata_callsign(dxcall):
dxcall = f"{dxcall}-0"
if not api_validations.validate_freedata_callsign(dxcall):
raise ValueError(f"Invalid dxcall given ({params['dxcall']})")
body = params['body']
if len(body) < 1:
raise ValueError(f"Body cannot be empty")
attachments = []
if 'attachments' in params:
for a in params['attachments']:
api_validations.validate_message_attachment(a)
attachments.append(cls.__decode_attachment__(a))
return cls(origin, dxcall, body, attachments)
@classmethod
def from_payload(cls, payload):
payload_message = json.loads(payload)
attachments = list(map(cls.__decode_attachment__, payload_message['attachments']))
return cls(payload_message['origin'], payload_message['destination'],
payload_message['body'], attachments)
def get_id(self) -> str:
return f"{self.origin}_{self.destination}_{self.timestamp}"
def __encode_attachment__(self, binary_attachment: dict):
encoded_attachment = binary_attachment.copy()
encoded_attachment['data'] = str(base64.b64encode(binary_attachment['data']), 'utf-8')
return encoded_attachment
def __decode_attachment__(encoded_attachment: dict):
decoded_attachment = encoded_attachment.copy()
decoded_attachment['data'] = base64.b64decode(encoded_attachment['data'])
return decoded_attachment
def to_dict(self, received=False):
"""Make a dictionary out of the message data
"""
return {
'id': self.get_id(),
'origin': self.origin,
'destination': self.destination,
'body': self.body,
'direction': 'receive' if received else 'transmit',
'attachments': list(map(self.__encode_attachment__, self.attachments)),
}
def to_payload(self):
"""Make a byte array ready to be sent out of the message data"""
json_string = json.dumps(self.to_dict())
return json_string