Refactor code structure for improved readability and maintainability

picopy/config.py

@@ -0,0 +1,98 @@
+"""PiCopy – Konfiguration, Pfade, Konstanten, Logging."""
+
+import os
+import json
+import logging
+from pathlib import Path
+
+RAW_BASE = 'https://git.leuschner.dev/Tobias/PiCopy/raw/branch/main'
+VERSION_FILE = Path(__file__).parent.parent / 'version.txt'
+
+
+def load_installed_version():
+    try:
+        return VERSION_FILE.read_text(encoding='utf-8').strip() or '1.0.4'
+    except Exception:
+        return 'X.X.X'
+
+
+VERSION = load_installed_version()
+
+BASE_DIR = Path('/opt/picopy')
+CONFIG_FILE = BASE_DIR / 'config.json'
+STATE_FILE  = BASE_DIR / 'state.json'
+LOG_DIR     = BASE_DIR / 'logs'
+LOG_FILE    = LOG_DIR  / 'picopy.log'
+INTERNAL_DEST_DIR = BASE_DIR / 'internal'
+LOG_DIR.mkdir(parents=True, exist_ok=True)
+HISTORY_FILE = BASE_DIR / 'history.json'
+MAX_HISTORY  = 100
+
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s %(levelname)s %(message)s',
+    handlers=[logging.FileHandler(LOG_FILE), logging.StreamHandler()]
+)
+log = logging.getLogger('picopy')
+
+NM_AP_CON     = 'PiCopy-AP'
+NM_CLIENT_CON = 'PiCopy-WiFi'
+WIFI_BOOT_WAIT = 25  # Sekunden warten beim Start bevor AP gestartet wird
+
+DEFAULT_CONFIG = {
+    # USB
+    'source_ports': [],          # [{port, label}, ...]
+    'source_port': None, 'source_label': '',  # Migration legacy
+    'dest_port': None,   'dest_label': '',
+    'dest_type': 'usb', 'internal_dest_label': 'Interner Speicher',
+    'internal_share_enabled': False,
+    'folder_format': '%Y-%m-%d', 'add_time': True,
+    'subfolder': True, 'auto_copy': True,
+    'file_filter': '', 'exclude_system': True,
+    'duplicate_handling': 'skip',
+    'verify_checksum': False, 'delete_source': False,
+    # WiFi
+    'wifi_ssid': '', 'wifi_password': '',
+    'ap_ssid': 'PiCopy', 'ap_password': 'PiCopy,',
+    # WireGuard
+    'wireguard_auto': False,
+}
+
+
+def load_cfg():
+    cfg = DEFAULT_CONFIG.copy()
+    try:
+        if CONFIG_FILE.exists():
+            cfg.update(json.loads(CONFIG_FILE.read_text(encoding='utf-8')))
+    except (json.JSONDecodeError, ValueError) as e:
+        log.error(f'config.json korrupt ({e}), verwende Standardwerte')
+        try: CONFIG_FILE.rename(CONFIG_FILE.with_suffix('.corrupt'))
+        except Exception: pass
+    except Exception as e:
+        log.warning(f'config.json nicht lesbar: {e}')
+    return cfg
+
+
+def save_cfg(cfg):
+    _atomic_write(CONFIG_FILE, json.dumps(cfg, indent=2))
+
+
+def _atomic_write(path: Path, content: str) -> None:
+    """Schreibt atomar: erst .tmp, dann os.replace() - sicher bei Stromausfall."""
+    tmp = path.with_suffix(path.suffix + '.tmp')
+    try:
+        tmp.write_text(content, encoding='utf-8')
+        with open(tmp, 'rb') as fh:
+            os.fsync(fh.fileno())      # Daten wirklich auf Datenträger schreiben
+        os.replace(str(tmp), str(path))  # Atomares Umbenennen (POSIX-Garantie)
+    except Exception:
+        try: tmp.unlink(missing_ok=True)
+        except Exception: pass
+        raise
+
+
+def _fmt_bytes(b):
+    if b < 1024: return f'{b} B'
+    if b < 1024**2: return f'{b/1024:.1f} KB'
+    if b < 1024**3: return f'{b/1024**2:.1f} MB'
+    return f'{b/1024**3:.2f} GB'