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duffyduck
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"""Verbindet Zwischenablage, Server und Oberflaeche."""
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import os
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import tempfile
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import time
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import traceback
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from concurrent.futures import ThreadPoolExecutor
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from pathlib import Path
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from PySide6.QtCore import QObject, QTimer, Signal
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from . import config, payload
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from .api import Api, Live
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from .clipboard import create_backend
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from .crypto import CryptoError, Keys
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from .payload import ClipContent, human
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class Entry:
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"""Ein Verlaufseintrag (Metadaten entschlüsselt, Inhalt liegt auf dem Server)."""
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def __init__(self, clip: dict, meta: dict, own: bool):
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self.id = clip["id"]
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self.ts = clip["ts"] / 1000
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self.size = clip["size"]
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self.meta = meta
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self.kind = meta.get("kind", "text")
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self.own = own
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@property
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def device(self) -> str:
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return self.meta.get("device", "?")
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@property
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def title(self) -> str:
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preview = self.meta.get("preview", "")
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if self.kind == "text":
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return " ".join(preview.split())[:120] or "(leer)"
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if self.kind == "files":
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names = self.meta.get("names", [])
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more = f" (+{len(names) - 3})" if len(names) > 3 else ""
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return ", ".join(names[:3]) + more
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return preview
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@property
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def subtitle(self) -> str:
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t = time.strftime("%d.%m. %H:%M", time.localtime(self.ts))
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extra = ""
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if self.kind == "files":
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extra = f" · {self.meta.get('count', 0)} Datei(en)"
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elif self.kind == "text":
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extra = f" · {self.meta.get('chars', 0)} Zeichen"
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return f"{self.device} · {t} · {human(self.meta.get('size', self.size))}{extra}"
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def inline_text(self) -> str | None:
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"""Kurze Texte stecken komplett in der Vorschau -> kein Download noetig."""
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if self.kind == "text" and self.meta.get("chars", -1) == len(self.meta.get("preview", "")):
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return self.meta["preview"]
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return None
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class Controller(QObject):
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history_changed = Signal()
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state_changed = Signal() # Verbindung/Geräte/Pause
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notify = Signal(str, str) # Titel, Text
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progress = Signal(str, int) # Text, Prozent (-1 = fertig)
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_ws_message = Signal(dict)
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_ws_state = Signal(bool, str)
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_apply_ready = Signal(object, bool) # ClipContent, automatisch?
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_error = Signal(str)
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def __init__(self):
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super().__init__()
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self.cfg = config.load()
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self.keys: Keys | None = None
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self.api: Api | None = None
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self.live: Live | None = None
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self.history: list[Entry] = []
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self.devices: list[str] = []
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self.connected = False
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self.last_error = ""
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self.paused = False
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self.pool = ThreadPoolExecutor(max_workers=3)
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self.last_applied_fp = ""
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self.last_sent_fp = ""
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self.local_generation = 0 # zaehlt lokale Kopiervorgaenge
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self.backend = create_backend()
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self._debounce = QTimer(self, singleShot=True, interval=350, timeout=self._check_clipboard)
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self.backend.changed.connect(self._debounce.start)
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self._ws_message.connect(self._on_ws_message)
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self._ws_state.connect(self._on_ws_state)
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self._apply_ready.connect(self._write_clipboard)
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self._error.connect(lambda msg: self.notify.emit("NetClip – Fehler", msg))
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self._cleanup = QTimer(self, interval=3600_000, timeout=self._cleanup_cache)
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self._cleanup.start()
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self._cleanup_cache()
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self.connect_server()
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# ---------------------------------------------------------------- Server
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def connect_server(self):
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if self.live:
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self.live.stop()
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self.live = None
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self.history, self.devices, self.connected = [], [], False
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self.history_changed.emit()
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if not self.cfg.configured:
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self.last_error = "Nicht eingerichtet"
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self.state_changed.emit()
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return
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self.keys = Keys(self.cfg.token)
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self.api = Api(self.cfg, self.keys)
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self.live = Live(self.api, self._ws_message.emit, self._ws_state.emit)
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self.live.start()
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def apply_config(self, cfg: config.Config):
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reconnect = (cfg.server, cfg.token, cfg.server_key, cfg.verify_tls, cfg.ca_file, cfg.device_name) != \
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(self.cfg.server, self.cfg.token, self.cfg.server_key, self.cfg.verify_tls,
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self.cfg.ca_file, self.cfg.device_name)
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self.cfg = cfg
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config.save(cfg)
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if reconnect:
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self.connect_server()
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self.state_changed.emit()
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def shutdown(self):
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if self.live:
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self.live.stop(wait=2)
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self.live = None
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if hasattr(self.backend, "stop"):
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self.backend.stop()
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self.pool.shutdown(wait=False, cancel_futures=True)
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def _on_ws_state(self, connected: bool, error: str):
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self.connected = connected
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if error or connected:
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self.last_error = error
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if not connected:
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self.devices = []
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self.state_changed.emit()
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def _entry(self, clip: dict) -> Entry | None:
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try:
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meta = self.keys.decrypt_meta(clip["meta"])
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except CryptoError:
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return None
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return Entry(clip, meta, clip["device"] == self.cfg.device_id)
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def _on_ws_message(self, msg: dict):
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t = msg.get("type")
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if t == "hello":
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self.history = [e for e in map(self._entry, msg.get("clips", [])) if e]
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self.history_changed.emit()
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elif t == "clip":
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entry = self._entry(msg["clip"])
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if not entry or any(e.id == entry.id for e in self.history):
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return
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self.history.insert(0, entry)
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self.history_changed.emit()
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if not entry.own and self.cfg.receive_enabled and not self.paused:
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if entry.size <= self.cfg.max_auto_receive_mb * 1024 * 1024:
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self.fetch(entry, auto=True)
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elif self.cfg.notifications:
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self.notify.emit(f"Großer Clip von {entry.device}",
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f"{entry.title} ({human(entry.size)}) – im Verlauf anklicken zum Laden")
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elif t == "deleted":
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self.history = [e for e in self.history if e.id != msg.get("id")]
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self.history_changed.emit()
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elif t == "cleared":
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self.history = []
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self.history_changed.emit()
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elif t == "devices":
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names = []
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for d in msg.get("devices", []):
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if d.get("device") == self.cfg.device_id:
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continue
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try:
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names.append(self.keys.decrypt_meta(d["label"]).get("name", "?"))
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except (CryptoError, KeyError):
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names.append(d.get("device", "?"))
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self.devices = names
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self.state_changed.emit()
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# ---------------------------------------------------------------- Senden
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def set_paused(self, paused: bool):
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self.paused = paused
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self.state_changed.emit()
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def _check_clipboard(self):
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try:
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content = self.backend.read()
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except Exception as e: # noqa: BLE001
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print("Zwischenablage nicht lesbar:", e)
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return
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if content is None or content.fp in (self.last_applied_fp, self.last_sent_fp):
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return
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self.local_generation += 1
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cfg = self.cfg
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if self.paused or not cfg.send_enabled or not self.api:
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return
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if not {"text": cfg.send_text, "image": cfg.send_images, "files": cfg.send_files}[content.kind]:
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return
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if content.kind == "files":
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limit = cfg.max_send_mb * 1024 * 1024
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if payload.files_size(content.paths, limit) > limit:
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self.notify.emit("NetClip", f"Nicht gesendet: Dateien größer als {cfg.max_send_mb} MB")
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return
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self.last_sent_fp = content.fp
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self.pool.submit(self._upload, content)
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def send_current(self):
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"""Manuell senden (Menue), auch wenn identisch zum letzten Mal."""
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self.last_sent_fp = self.last_applied_fp = ""
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was_paused, self.paused = self.paused, False
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self._check_clipboard()
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self.paused = was_paused
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def _upload(self, content: ClipContent):
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plain = enc = None
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try:
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label = {"text": "Text", "image": "Bild", "files": "Dateien"}[content.kind]
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self.progress.emit(f"Packe {label} …", 0)
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meta, plain = payload.build(content, self.cfg.device_name)
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fd, enc = tempfile.mkstemp(prefix="netclip-", suffix=".enc")
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enc = Path(enc)
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with open(plain, "rb") as src, os.fdopen(fd, "wb") as dst:
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self.keys.encrypt_stream(src, dst)
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self.api.upload(meta, enc, self._progress_cb(f"Sende {label}"))
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except Exception as e: # noqa: BLE001
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traceback.print_exc()
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self.last_sent_fp = ""
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self._error.emit(f"Senden fehlgeschlagen: {e}")
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finally:
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self.progress.emit("", -1)
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for p in (plain, enc):
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if p:
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Path(p).unlink(missing_ok=True)
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def _progress_cb(self, text: str):
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last = [0.0]
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def cb(done, total):
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now = time.monotonic()
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if total and (now - last[0] > 0.2 or done >= total):
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last[0] = now
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self.progress.emit(f"{text} … {human(done)} / {human(total)}", int(done * 100 / total))
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return cb
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# ---------------------------------------------------------------- Empfangen
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def fetch(self, entry: Entry, auto=False, save_to: str | None = None):
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text = entry.inline_text()
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if text is not None and not save_to:
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self._write_clipboard(ClipContent("text", text=text), auto)
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return
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generation = self.local_generation
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self.pool.submit(self._fetch, entry, auto, generation, save_to)
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def _fetch(self, entry: Entry, auto: bool, generation: int, save_to: str | None):
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enc = plain = None
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try:
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target = payload.received_dir() / entry.id
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if entry.kind == "files" and target.exists() and not save_to:
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content = ClipContent("files", paths=sorted(str(p) for p in target.iterdir()))
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else:
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fd, enc = tempfile.mkstemp(prefix="netclip-", suffix=".enc")
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os.close(fd)
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enc = Path(enc)
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self.api.download(entry.id, enc, self._progress_cb(f"Lade von {entry.device}"))
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fd, plain = tempfile.mkstemp(prefix="netclip-", suffix=".plain")
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plain = Path(plain)
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with open(enc, "rb") as src, os.fdopen(fd, "wb") as dst:
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self.keys.decrypt_stream(src, dst)
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enc.unlink()
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enc = None
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content = payload.materialize(entry.kind, plain, entry.id)
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if save_to:
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self._save(content, entry, Path(save_to))
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self.notify.emit("NetClip", f"Gespeichert in {save_to}")
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return
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# Während des Downloads lokal etwas Neues kopiert? Dann nicht überschreiben.
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if auto and generation != self.local_generation:
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return
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self._apply_ready.emit(content, auto)
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if auto and self.cfg.notifications:
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self.notify.emit(f"Von {entry.device}", entry.title)
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except Exception as e: # noqa: BLE001
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traceback.print_exc()
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self._error.emit(f"Empfangen fehlgeschlagen: {e}")
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finally:
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self.progress.emit("", -1)
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for p in (enc, plain):
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if p:
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Path(p).unlink(missing_ok=True)
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@staticmethod
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def _save(content: ClipContent, entry: Entry, folder: Path):
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import shutil
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folder.mkdir(parents=True, exist_ok=True)
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if content.kind == "files":
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for p in content.paths:
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dest = folder / Path(p).name
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if Path(p).is_dir():
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shutil.copytree(p, dest, dirs_exist_ok=True)
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else:
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shutil.copy2(p, dest)
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elif content.kind == "image":
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(folder / f"netclip-{time.strftime('%Y%m%d-%H%M%S', time.localtime(entry.ts))}.png").write_bytes(content.png)
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else:
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(folder / f"netclip-{time.strftime('%Y%m%d-%H%M%S', time.localtime(entry.ts))}.txt").write_text(
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content.text, encoding="utf-8")
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def _write_clipboard(self, content: ClipContent, auto: bool):
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try:
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self.last_applied_fp = self.backend.write(content)
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except Exception as e: # noqa: BLE001
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self._error.emit(f"Zwischenablage nicht beschreibbar: {e}")
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# ---------------------------------------------------------------- Verwaltung
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def delete(self, entry: Entry):
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self.pool.submit(self._call, self.api.delete, entry.id)
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def clear(self):
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self.pool.submit(self._call, self.api.clear)
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def _call(self, fn, *args):
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try:
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fn(*args)
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except Exception as e: # noqa: BLE001
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self._error.emit(str(e))
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def _cleanup_cache(self):
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payload.cleanup_received(self.cfg.keep_received_days)
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