networking shim

"""
Unified Shim for Sermon Codebase
Provides abstract interfaces for networking, data processing, and monitoring components
"""

from abc import ABC, abstractmethod
from typing import Any, Dict, List, Optional, Tuple, Union
import logging

logger = logging.getLogger(__name__)

# ============================================================================
# Data Processing Interfaces
# ============================================================================

class DataProcessor(ABC):
"""Abstract base for data processing operations"""
@abstractmethod

def process(self, data: str) -> str:
"""Process data and return result"""
pass
@abstractmethod

def validate(self, data: str) -> bool:
"""Validate input data"""
pass
class BitProcessor(DataProcessor):
"""Handles bit stuffing/destuffing operations"""

def process(self, data: str) -> str:
"""Applies bit stuffing to binary string"""
if not self.validate(data):
raise ValueError("Invalid binary data")
return self._stuff_bits(data)
def _stuff_bits(self, data: str) -> str:
"""Internal bit stuffing logic"""
count = 0
stuffed = ""
for bit in data:
if bit == '1':
count += 1
stuffed += bit
if count == 5:
stuffed += '0'
count = 0
else:
count = 0
stuffed += bit
return stuffed
def validate(self, data: str) -> bool:
"""Validate binary string"""
return all(c in '01' for c in data) and len(data) > 0
class ChecksumProcessor(DataProcessor):
"""Handles checksum calculations (normal, 1's, 2's complement)"""
METHOD_NORMAL = 0
METHOD_ONES_COMPLEMENT = 1
METHOD_TWOS_COMPLEMENT = 2

def __init__(self, block_size: int = 8, method: int = METHOD_NORMAL):
self.block_size = block_size
self.method = method
def process(self, data: str) -> str:
"""Calculate checksum for binary data"""
if not self.validate(data):
raise ValueError("Invalid binary data")
return self._calculate_checksum(data)
def _calculate_checksum(self, data: str) -> str:
"""Internal checksum calculation"""
blocks = [data[i:i+self.block_size]
for i in range(0, len(data), self.block_size)]
checksum = 0
for block in blocks:
checksum ^= int(block, 2)
return bin(checksum)[2:].zfill(self.block_size)
def validate(self, data: str) -> bool:
"""Validate binary string"""
return all(c in '01' for c in data) and len(data) > 0
class HammingProcessor(DataProcessor):
"""Handles Hamming code generation and error detection/correction"""
def process(self, data: str) -> str:
"""Generate Hamming code for data"""
if not self.validate(data):
raise ValueError("Invalid binary data")
return self._generate_hamming_code(data)
def _generate_hamming_code(self, data: str) -> str:
"""Internal Hamming code generation"""
bits = [int(b) for b in data]
parity_bits = self._calculate_parity_bits(len(bits))

total_bits = len(bits) + parity_bits
code = [0] * total_bits
# Insert data bits
data_idx = 0
for i in range(total_bits):
if (i + 1) & i == 0:
continue
code[i] = bits[data_idx] if data_idx < len(bits) else 0
data_idx += 1
# Calculate parity bits
for i in range(parity_bits):
pos = 2 ** i
parity = 0
for j in range(total_bits):
if (j + 1) & pos:
parity ^= code[j]
code[pos - 1] = parity
return ''.join(str(b) for b in code)
def _calculate_parity_bits(self, data_bits: int) -> int:
"""Calculate required parity bits"""
r = 0
while (1 << r) < (data_bits + r + 1):
r += 1
return r
def validate(self, data: str) -> bool:
"""Validate binary string"""
return all(c in '01' for c in data) and len(data) > 0
# ============================================================================
# Network Interfaces
# ============================================================================
class NetworkAdapter(ABC):
"""Abstract base for network operations"""
@abstractmethod

def connect(self, host: str, port: int) -> bool:
"""Establish connection"""
pass
@abstractmethod

def send(self, data: Union[str, bytes]) -> bool:
"""Send data"""
pass
@abstractmethod

def receive(self, buffer_size: int = 1024) -> Union[str, bytes, None]:
"""Receive data"""
pass
@abstractmethod

def disconnect(self) -> bool:

"""Close connection"""
pass
class TCPAdapter(NetworkAdapter):

"""TCP socket implementation"""
def __init__(self):
self.socket = None
self.connected = False
def connect(self, host: str, port: int) -> bool:
"""Establish TCP connection"""
try:
import socket
self.socket = socket.socket(http://socket.AF_INET, socket.SOCK_STREAM)
self.socket.connect((host, port))
self.connected = True
http://logger.info(f"Connected to {host}:{port}")
return True
except Exception as e:
logger.error(f"TCP connection failed: {e}")
return False
def send(self, data: Union[str, bytes]) -> bool:
"""Send data over TCP"""
if not self.connected:
logger.error("Not connected")
return False
try:

if isinstance(data, str):
data = data.encode('utf-8')
self.socket.sendall(data)
return True
except Exception as e:
logger.error(f"Send failed: {e}")
return False
def receive(self, buffer_size: int = 1024) -> Optional[bytes]:
"""Receive data over TCP"""
if not self.connected:
logger.error("Not connected")
return None
try:
return self.socket.recv(buffer_size)
except Exception as e:
logger.error(f"Receive failed: {e}")
return None
def disconnect(self) -> bool:
"""Close TCP connection"""
if self.socket:
try:
self.socket.close()
self.connected = False
http://logger.info("Disconnected")
return True
except Exception as e:
logger.error(f"Disconnect failed: {e}")
return False
return True
class UDPAdapter(NetworkAdapter):
"""UDP socket implementation"""
def __init__(self):
self.socket = None
self.remote_addr = None
self.connected = False
def connect(self, host: str, port: int) -> bool:
"""Setup UDP connection"""
try:
import socket
self.socket = socket.socket(http://socket.AF_INET, socket.SOCK_DGRAM)
self.remote_addr = (host, port)
self.connected = True
http://logger.info(f"UDP ready for {host}:{port}")
return True
except Exception as e:
logger.error(f"UDP setup failed: {e}")
return False
def send(self, data: Union[str, bytes]) -> bool:
"""Send data over UDP"""
if not self.connected or not self.remote_addr:
logger.error("Not connected")
return False
try:
if isinstance(data, str):
data = data.encode('utf-8')
self.socket.sendto(data, self.remote_addr)
return True

except Exception as e:
logger.error(f"Send failed: {e}")
return False
def receive(self, buffer_size: int = 1024) -> Optional[bytes]:
"""Receive data over UDP"""
if not self.connected:
logger.error("Not connected")
return None
try:
data, _ = self.socket.recvfrom(buffer_size)
return data
except Exception as e:
logger.error(f"Receive failed: {e}")
return None
def disconnect(self) -> bool:
"""Close UDP socket"""
if self.socket:
try:
self.socket.close()
self.connected = False
http://logger.info("Disconnected")
return True
except Exception as e:
logger.error(f"Disconnect failed: {e}")
return False
return True
# ============================================================================
# Monitoring Interfaces
# ============================================================================
class Monitor(ABC):
"""Abstract base for monitoring"""
@abstractmethod

def collect_metrics(self) -> Dict[str, Any]:
"""Collect metrics"""
pass
@abstractmethod

def report(self) -> str:
"""Generate report"""
pass
class StatusMonitor(Monitor):
"""Monitors server/component status"""
def __init__(self):
self.metrics: Dict[str, Any] = {}
self.status = "unknown"
def collect_metrics(self) -> Dict[str, Any]:
"""Collect current metrics"""
return {
"status": self.status,
"timestamp": self._get_timestamp(),
"metrics": self.metrics
}
def report(self) -> str:
"""Generate status report"""
metrics = self.collect_metrics()
return f"Status: {metrics['status']} | Timestamp: {metrics['timestamp']}"
def set_status(self, status: str):
"""Update status"""
self.status = status
http://logger.info(f"Status: {status}")

def set_metric(self, key: str, value: Any):
"""Set metric value"""
self.metrics[key] = value

@staticmethod

def _get_timestamp() -> str:
"""Get current timestamp"""
from datetime import datetime
return http://datetime.now().isoformat()
class IncidentMonitor(Monitor):
"""Monitors data quality incidents"""
def __init__(self):
self.incidents: List[Dict[str, Any]] = []
def collect_metrics(self) -> Dict[str, Any]:
"""Collect incident metrics"""
return {

"total_incidents": len(self.incidents),
"open_incidents": len([i for i in self.incidents if i.get("state") == "open"]),
"closed_incidents": len([i for i in self.incidents if i.get("state") == "closed"]),
}
def report(self) -> str:
"""Generate incident report"""
metrics = self.collect_metrics()
return (f"Incidents - Total: {metrics['total_incidents']}, "
f"Open: {metrics['open_incidents']}, "
f"Closed: {metrics['closed_incidents']}")
def add_incident(self, incident: Dict[str, Any]):
"""Log an incident"""
self.incidents.append(incident)
logger.warning(f"Incident logged: {incident.get('subject', 'Unknown')}")
# ============================================================================
# Unified Shim Interface
# ============================================================================
class SermonShim:
"""Main shim providing access to all subsystems"""
def __init__(self):
# Data processors
self.bit_processor = BitProcessor()
self.checksum_processor = ChecksumProcessor()
self.hamming_processor = HammingProcessor()
# Network adapters
self.tcp_adapter = TCPAdapter()
self.udp_adapter = UDPAdapter()
# Monitors
self.status_monitor = StatusMonitor()
self.incident_monitor = IncidentMonitor()
http://logger.info("SermonShim initialized")
def process_data(self, processor_type: str, data: str) -> Optional[str]:
"""Process data using specified processor"""
processors = {
'bit': self.bit_processor,

'checksum': self.checksum_processor,
'hamming': self.hamming_processor,
}
processor = processors.get(processor_type)
if not processor:
logger.error(f"Unknown processor: {processor_type}")
return None
try:
return processor.process(data)
except Exception as e:
logger.error(f"Processing failed: {e}")
return None
def send_over_network(self, protocol: str, host: str, port: int,
data: Union[str, bytes]) -> bool:
"""Send data over network using specified protocol"""
adapter = self.tcp_adapter if protocol.upper() == 'TCP' else self.udp_adapter
if not adapter.connected:
if not adapter.connect(host, port):
return False
return adapter.send(data)
def receive_from_network(self, protocol: str, buffer_size: int = 1024) -> Optional[Union[str, bytes]]:
"""Receive data from network"""
adapter = self.tcp_adapter if protocol.upper() == 'TCP' else self.udp_adapter
if not adapter.connected:
logger.error("Not connected. Call send_over_network first or connect explicitly")

return None
return adapter.receive(buffer_size)
def get_status_report(self) -> str:

"""Get current system status"""
return f"{self.status_monitor.report()} | {self.incident_monitor.report()}"
# ============================================================================
# Convenience Functions
# ============================================================================
def create_shim() -> SermonShim:
"""Factory function to create a new shim instance"""
return SermonShim()