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#!/usr/bin/env python3
from abc import ABC, abstractmethod
import typing
import sys
class DataProcessor(ABC):
def __init__(self, name: str) -> None:
self.storage: typing.List[typing.Any] = []
self.rank: int = 0
self.counter: int = 0
self.name = name
@abstractmethod
def validate(self, data: typing.Any) -> bool:
pass
@abstractmethod
def ingest(self, data: typing.Any) -> None:
pass
def output(self) -> tuple[int, str]:
# extract the oldest piece of data
# piece of data is removed
position = self.rank
self.rank += 1
if isinstance(self.storage[0], dict):
entry = self.storage[0]
output_tuple: tuple = tuple(entry.values())
to_return = (f"{output_tuple[0]}: {output_tuple[1]}")
self.storage.pop(0)
return position, to_return
to_return = self.storage[0]
self.storage.pop(0)
return position, to_return
class NumericProcessor(DataProcessor):
def validate(self, data: int | float | typing.List[int | float]) -> bool:
try:
if isinstance(data, int):
self.counter += 1
return True
elif isinstance(data, float):
self.counter += 1
return True
elif isinstance(data, typing.List):
type_list = "yes"
for item in data:
self.counter += 1
if not isinstance(item, int | float):
type_list = "no"
self.counter -= 1
if type_list == "yes":
return True
else:
raise ValueError()
else:
raise ValueError()
except ValueError:
return False
def ingest(self, data: int | float | typing.List[int | float]) -> None:
try:
if isinstance(data, typing.List):
for item in data:
if isinstance(item, int | float):
self.storage.append(item)
elif isinstance(data, int | float):
self.storage.append(data)
else:
raise ValueError()
except ValueError:
print("Improper numeric data", file=sys.stderr)
def is_number(s: str) -> bool:
try:
float(s)
return True
except (ValueError, TypeError):
return False
class TextProcessor(DataProcessor):
def validate(self, data: str | typing.List[str]) -> bool:
try:
if isinstance(data, str):
if is_number(data):
raise ValueError()
else:
self.counter += 1
return True
elif isinstance(data, typing.List):
for item in data:
if isinstance(item, str):
if is_number(item):
raise ValueError()
return False
elif isinstance(item, dict):
raise ValueError()
return False
else:
self.counter += 1
if isinstance(item, dict):
raise ValueError()
return False
return True
else:
raise ValueError()
except ValueError:
return False
def ingest(self, data: str | typing.List[str]) -> None:
try:
if isinstance(data, str):
self.storage.append(data)
elif isinstance(data, typing.List):
for item in data:
if is_number(item):
raise ValueError()
elif isinstance(item, dict):
raise ValueError()
else:
self.storage.append(item)
else:
raise ValueError()
except ValueError:
print("Improper text data", file=sys.stderr)
class LogProcessor(DataProcessor):
def validate(self, data: dict | typing.List[dict]) -> bool:
try:
if isinstance(data, dict):
return True
if isinstance(data, typing.List):
for item in data:
if isinstance(item, dict):
self.counter += 1
else:
raise ValueError()
return False
return True
else:
raise ValueError()
except ValueError:
return False
def ingest(self, data: dict | typing.List[dict]) -> None:
try:
if isinstance(data, dict):
for item in data:
self.storage.append(item)
elif isinstance(data, typing.List):
for item in data:
if isinstance(item, dict):
self.storage.append(item)
else:
raise ValueError()
except ValueError:
print("Improper log data", file=sys.stderr)
def testNumericProcessor() -> None:
is_num = NumericProcessor("Numeric Processor")
test_num: typing.List = [42, 42.0, 'FortyTwo']
for item in test_num:
print(f"Trying to validate input {item}: ", end='')
print(is_num.validate(item))
print("Testing invalid ingestion of string 'foo' without prior validation")
print("Got exception: ", end='')
# flush buffer
sys.stdout.flush()
# will raise a mypy error
is_num.ingest('foo')
is_num.ingest([1, 2, 3, 4, 5])
print(f"Processing data: {is_num.storage}")
print(f"Extracting {len(is_num.storage)} values...")
while is_num.storage:
position, value = is_num.output()
print(f"Numeric value {position} : {value}")
def testTextProcessor() -> None:
is_text = TextProcessor("Text Processor")
# test_text: typing.List = ['42', '42.0', 'FortyTwo', ['More', '43']]
test_text: typing.List = ['42', '42.0', 'FortyTwo']
for item in test_text:
print(f"Trying to validate input {item}: ", end='')
print(is_text.validate(item))
test_list_text: typing.List = ['Hello', 'Nexus', 'FortyTwo']
print(f"Trying to validate '{test_list_text}': "
f"{is_text.validate(test_list_text)}")
is_text.ingest(test_list_text)
print(f"Processing data: {is_text.storage}")
print(f"Extracting {len(is_text.storage)} values...")
while is_text.storage:
position, value = is_text.output()
print(f"Text value {position} : {value}")
def testLogProcessor() -> None:
log = [{'log_level': 'NOTICE',
'log_message': 'Connection to server'},
{'log_level': 'ERROR',
'log_message': 'Unauthorized access!!'}]
is_log = LogProcessor("Log Processor")
# will raise a mypy error
print(f"Trying to validate input 'Hello': {is_log.validate('Hello')}")
is_log.ingest(log)
print(f"Processing data: {is_log.storage}")
print(f"Extracting {len(is_log.storage)} values...")
while is_log.storage:
position, value = is_log.output()
print(f"Log entry {position} : {value}")
def main() -> None:
print("=== Code Nexus - Data Processor ===")
print("Testing Numeric Processor...")
testNumericProcessor()
print()
print("Testing Text Processor...")
testTextProcessor()
print()
print("Testing Log Processor...")
testLogProcessor()
if __name__ == "__main__":
main()
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