50 lines
1.0 KiB
Python
50 lines
1.0 KiB
Python
"""
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ⒸAngelaMos | 2026
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utils.py
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"""
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import sys
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from pathlib import Path
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def read_input(text: str | None, input_file: Path | None) -> str:
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"""
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Read input from text argument, file, or stdin
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"""
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if text:
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return text
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if input_file:
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return input_file.read_text(encoding = "utf-8")
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if not sys.stdin.isatty():
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return sys.stdin.read()
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msg = "No input provided. Use TEXT argument, --input-file, or pipe to stdin"
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raise ValueError(msg)
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def write_output(
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content: str,
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output_file: Path | None,
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quiet: bool = False
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) -> None:
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"""
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Write output to file or stdout
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"""
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if output_file:
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output_file.write_text(content, encoding = "utf-8")
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if not quiet:
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print(f"Output written to {output_file}")
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else:
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print(content)
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def validate_key(key: int) -> None:
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"""
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Validate Caesar cipher key is within acceptable range
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"""
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if not 0 <= key <= 26:
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msg = f"Key must be between 0 and 26, got {key}"
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raise ValueError(msg)
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