106 lines
3.8 KiB
Python
106 lines
3.8 KiB
Python
import sqlite3
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import threading
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from datetime import datetime, timezone
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class SyncState:
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def __init__(self, db_path="./sync.db"):
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self.db_path = db_path
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self._lock = threading.Lock()
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self._conn = sqlite3.connect(db_path, timeout=30)
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self._conn.execute("PRAGMA journal_mode=WAL")
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self._conn.execute("""
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CREATE TABLE IF NOT EXISTS events (
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uid TEXT PRIMARY KEY,
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content_hash TEXT NOT NULL,
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synced_at TIMESTAMP NOT NULL
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)
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""")
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self._conn.execute("""
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CREATE TABLE IF NOT EXISTS ics_cache (
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id INTEGER PRIMARY KEY CHECK(id=1),
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ics_hash TEXT,
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etag TEXT,
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fetched_at TIMESTAMP
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)
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""")
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self._conn.commit()
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def get_event_uids(self) -> set[str]:
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with self._lock:
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cur = self._conn.execute("SELECT uid FROM events")
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return {row[0] for row in cur.fetchall()}
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def get_event_hash(self, uid: str) -> str | None:
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with self._lock:
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cur = self._conn.execute("SELECT content_hash FROM events WHERE uid = ?", (uid,))
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row = cur.fetchone()
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return row[0] if row else None
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def upsert_event(self, uid: str, content_hash: str) -> None:
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with self._lock:
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self._conn.execute("""
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INSERT OR REPLACE INTO events (uid, content_hash, synced_at)
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VALUES (?, ?, ?)
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""", (uid, content_hash, datetime.now(timezone.utc).isoformat()))
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self._conn.commit()
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def delete_event(self, uid: str) -> None:
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with self._lock:
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self._conn.execute("DELETE FROM events WHERE uid = ?", (uid,))
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self._conn.commit()
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def clear_events(self) -> int:
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with self._lock:
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cur = self._conn.execute("SELECT COUNT(*) FROM events")
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count = cur.fetchone()[0]
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self._conn.execute("DELETE FROM events")
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self._conn.commit()
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return count
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def get_ics_cache(self) -> tuple[str | None, str | None, str | None]:
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with self._lock:
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cur = self._conn.execute("SELECT ics_hash, etag, fetched_at FROM ics_cache WHERE id = 1")
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row = cur.fetchone()
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if row:
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return (row[0], row[1], row[2])
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return (None, None, None)
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def set_ics_cache(self, ics_hash: str, etag: str | None) -> None:
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with self._lock:
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self._conn.execute("""
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INSERT INTO ics_cache (id, ics_hash, etag, fetched_at)
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VALUES (1, ?, ?, ?)
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ON CONFLICT(id) DO UPDATE SET ics_hash = ?, etag = ?, fetched_at = ?
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""", (ics_hash, etag, datetime.now(timezone.utc).isoformat(),
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ics_hash, etag, datetime.now(timezone.utc).isoformat()))
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self._conn.commit()
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def clear_ics_cache(self) -> None:
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with self._lock:
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self._conn.execute("DELETE FROM ics_cache")
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self._conn.commit()
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def snapshot(self) -> dict:
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with self._lock:
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cur = self._conn.execute("SELECT uid, content_hash FROM events")
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rows = cur.fetchall()
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return {
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"uids": [r[0] for r in rows],
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"hashes": {r[0]: r[1] for r in rows}
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}
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def restore_snapshot(self, data: dict) -> None:
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with self._lock:
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self._conn.execute("DELETE FROM events")
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for uid, content_hash in data.get("hashes", {}).items():
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self._conn.execute("""
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INSERT INTO events (uid, content_hash, synced_at)
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VALUES (?, ?, ?)
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""", (uid, content_hash, datetime.now(timezone.utc).isoformat()))
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self._conn.commit()
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def close(self) -> None:
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with self._lock:
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self._conn.close()
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