FreeDATA/modem/message_system_db_model.py

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# models.py
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from sqlalchemy import Index, Boolean, Column, String, Integer, JSON, ForeignKey, DateTime
from sqlalchemy.orm import declarative_base, relationship
Base = declarative_base()
class MessageAttachment(Base):
__tablename__ = 'message_attachment'
message_id = Column(String, ForeignKey('p2p_message.id', ondelete='CASCADE'), primary_key=True)
attachment_id = Column(Integer, ForeignKey('attachment.id', ondelete='CASCADE'), primary_key=True)
message = relationship('P2PMessage', back_populates='message_attachments')
attachment = relationship('Attachment', back_populates='message_attachments')
class Config(Base):
__tablename__ = 'config'
db_variable = Column(String, primary_key=True) # Unique identifier for the configuration setting
db_version = Column(String)
def to_dict(self):
return {
'db_variable': self.db_variable,
'db_settings': self.db_settings
}
class Beacon(Base):
__tablename__ = 'beacon'
id = Column(Integer, primary_key=True)
timestamp = Column(DateTime)
snr = Column(Integer)
callsign = Column(String, ForeignKey('station.callsign'))
station = relationship("Station", back_populates="beacons")
Index('idx_beacon_callsign', 'callsign')
class Station(Base):
__tablename__ = 'station'
callsign = Column(String, primary_key=True)
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checksum = Column(String, nullable=True)
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location = Column(JSON, nullable=True)
info = Column(JSON, nullable=True)
beacons = relationship("Beacon", order_by="Beacon.id", back_populates="station")
Index('idx_station_callsign_checksum', 'callsign', 'checksum')
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def to_dict(self):
return {
'callsign': self.callsign,
'checksum': self.checksum,
'location': self.location,
'info': self.info,
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}
class Status(Base):
__tablename__ = 'status'
id = Column(Integer, primary_key=True)
name = Column(String, unique=True)
class P2PMessage(Base):
__tablename__ = 'p2p_message'
id = Column(String, primary_key=True)
origin_callsign = Column(String, ForeignKey('station.callsign'))
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via_callsign = Column(String, ForeignKey('station.callsign'), nullable=True)
destination_callsign = Column(String, ForeignKey('station.callsign'))
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body = Column(String, nullable=True)
message_attachments = relationship('MessageAttachment',
back_populates='message',
cascade='all, delete-orphan')
attempt = Column(Integer, default=0)
timestamp = Column(DateTime)
status_id = Column(Integer, ForeignKey('status.id'), nullable=True)
status = relationship('Status', backref='p2p_messages')
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priority = Column(Integer, default=10)
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direction = Column(String)
statistics = Column(JSON, nullable=True)
is_read = Column(Boolean, default=True)
Index('idx_p2p_message_origin_timestamp', 'origin_callsign', 'via_callsign', 'destination_callsign', 'timestamp', 'attachments')
def to_dict(self):
attachments_list = [ma.attachment.to_dict() for ma in self.message_attachments]
return {
'id': self.id,
'timestamp': self.timestamp.isoformat() if self.timestamp else None,
'attempt': self.attempt,
'origin': self.origin_callsign,
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'via': self.via_callsign,
'destination': self.destination_callsign,
'direction': self.direction,
'body': self.body,
'attachments': attachments_list,
'status': self.status.name if self.status else None,
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'priority': self.priority,
'is_read': self.is_read,
'statistics': self.statistics
}
class Attachment(Base):
__tablename__ = 'attachment'
id = Column(Integer, primary_key=True)
name = Column(String)
data_type = Column(String)
data = Column(String)
checksum_crc32 = Column(String)
hash_sha512 = Column(String)
message_attachments = relationship("MessageAttachment", back_populates="attachment")
Index('idx_attachments_id_message_id', 'id', 'hash_sha512')
def to_dict(self):
return {
'id': self.id,
'name': self.name,
'type': self.data_type,
'data': self.data,
'checksum_crc32': self.checksum_crc32,
'hash_sha512' : self.hash_sha512
}