startup

#!/bin/python3

"""
Raspberry startup script

Check for previous runtime data
and move them to dedicated folder
"""

from pathlib import Path
from datetime import datetime
from main import runtime_scheduler, main
import json


def size_format(size):
    for hp in ['bytes', 'KB', 'MB', 'GB', 'TB']:
        if size < 1024.0:
            return f'{round(size, 2)} {hp}'
        size /= 1024.0
    return size


here = Path(__file__).parent.resolve()
runtime_suffixes = [
    '.jpg',
    '.csv',
    '.log',
    '.json'
]

date_format = '%d.%m.%Y-%H:%M:%S'

files = list(filter(
    lambda file: file.is_file() and file.suffix in runtime_suffixes,
    here.iterdir()
))

if len(files) > 0:

    oldest_modification = datetime.fromtimestamp(min(map(
        lambda file: int(file.stat().st_mtime),
        files
    )))

    runtime_folder = oldest_modification.strftime(date_format)
    runtime_path = here / runtime_folder
    funtime_files_path = runtime_path / 'runtime'

    funtime_files_path.mkdir(parents=True, exist_ok=True)

    total_size = 0

    for file in files:
        total_size += file.stat().st_size
        destination = funtime_files_path / file.name
        file.replace(destination)

    meta_dir = runtime_path / 'meta.json'
    with meta_dir.open("w", encoding="utf-8") as meta_f:
        meta_f.write(json.dumps({
            'size': {
                'raw': total_size,
                'formatted': size_format(total_size)
            },
            'date': {
                'backup': datetime.now().strftime(date_format),
                'oldest_modification': oldest_modification.strftime(date_format)
            },
            'files': list(map(lambda f: str(f.name), files))
        }, indent=4))

runtime_scheduler(main)