"""

Example Database used for the BACnet Server Example

# Set

BACnetDatabase.Set(1,2,3,77,"Device Rainbow" )

BACnetDatabase.Set(1,2,3,85,"99.88" )

# Get

print(f"Retrieved device objectName: {BACnetDatabase.Get(1,2,3,77)}")

print(f"Retrieved device presentValue: {BACnetDatabase.Get(1,2,3,85)}")

# Arrays

BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["presentvalue"], [True, True, False, True])

print(f"1 Retrieved network port presentValue: {BACnetDatabase.Get(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["presentvalue"])}")

BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["presentvalue"], False, True, 1)

print(f"2 Retrieved network port presentValue: {BACnetDatabase.Get(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["presentvalue"])}")

print(f"3 Retrieved network port presentValue: {BACnetDatabase.Get(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["presentvalue"], True, 1)}")

exit()

"""

import ctypes

import json

try:

from typing import Dict, List, Tuple, Any, Optional, Union

except ImportError:

# For older Python versions, ignore type hints

pass

class ExampleDatabase:

def __init__(self):

# Use nested dictionaries for flexible structure

self.db = {}

def Get(self, deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex=False, propertyArrayIndex=0):

# Ensure all parameters are the correct type for dictionary keys

try:

deviceInstance = int(deviceInstance)

objectType = int(objectType)

objectInstance = int(objectInstance)

propertyIdentifier = int(propertyIdentifier)

except Exception:

print(f"Invalid parameter type. All parameters must be convertible to int.")

print(f"Received: deviceInstance={deviceInstance}, objectType={objectType}, objectInstance={objectInstance}, propertyIdentifier={propertyIdentifier}")

return None

try:

raw_value = self.db[deviceInstance][objectType][objectInstance][propertyIdentifier]

if raw_value is None:

return None

if useArrayIndex:

if propertyArrayIndex == 0:

# We are trying to find the array size

# print(f"Array size requested for property {propertyIdentifier}. Returning size: {len(raw_value)}")

return len(raw_value)

# BACnet starts counting the array index from 1

# We remove one from the index so that its Zero offset

propertyArrayIndex -= 1

if isinstance(raw_value, list) and propertyArrayIndex < len(raw_value):

# print(f"Array index {propertyArrayIndex} found for property {propertyIdentifier}: {raw_value[propertyArrayIndex]}")

return str(raw_value[propertyArrayIndex])

else:

#print(f"Array index {propertyArrayIndex} out of range for property {propertyIdentifier}")

return None

elif isinstance(raw_value, list):

# print(f"Array found for property {propertyIdentifier}: {raw_value}")

return raw_value

else:

# print(f"Value found for property {propertyIdentifier}: {raw_value}")

return str(raw_value)

except KeyError:

print(f"Failed to retrieve value for Device {deviceInstance}, Object Type {objectType}, Instance {objectInstance}, Property {propertyIdentifier}")

pass

except Exception as e:

print(f"Error retrieving value: {e}")

return None

def GetObjectsList(self, deviceInstance):

try:

objects = []

for objectType, instances in self.db[deviceInstance].items():

for objectInstance in instances.keys():

objects.append((objectType, objectInstance))

return objects

except KeyError:

return []

def Set(self, deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex=False, propertyArrayIndex=0):

# Create nested dicts as needed

if deviceInstance not in self.db:

self.db[deviceInstance] = {}

if objectType not in self.db[deviceInstance]:

self.db[deviceInstance][objectType] = {}

if objectInstance not in self.db[deviceInstance][objectType]:

self.db[deviceInstance][objectType][objectInstance] = {}

if useArrayIndex:

if propertyIdentifier not in self.db[deviceInstance][objectType][objectInstance]:

self.db[deviceInstance][objectType][objectInstance][propertyIdentifier] = []

# Ensure the list is large enough

while len(self.db[deviceInstance][objectType][objectInstance][propertyIdentifier]) <= propertyArrayIndex:

self.db[deviceInstance][objectType][objectInstance][propertyIdentifier].append(None)

# Set the value at the specified index

self.db[deviceInstance][objectType][objectInstance][propertyIdentifier][propertyArrayIndex] = value

else:

# Directly set the value without array index

self.db[deviceInstance][objectType][objectInstance][propertyIdentifier] = value

def Save(self, fileName):

'''

Serialize the database to a file.

'''

try:

with open(fileName, 'w') as f:

json.dump(self.db, f)

return True

except Exception as e:

print(f"Error saving database: {e}")

return False

def Load(self, fileName):

'''

Load the database from a file.

'''

try:

with open(fileName, 'r') as f:

self.db = json.load(f)

return True

except Exception as e:

print(f"Error loading database: {e}")

return False