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Build KarlDNS self-hosted DynDNS service
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StasonJatham committed
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@@ -0,0 +1,221 @@
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from __future__ import annotations
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import sqlite3
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from datetime import UTC, datetime
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from ..ddns_models import UpdateResult
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from .types import UpdateEventRow
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class RecordsEventsMixin:
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def upsert(
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self,
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hostname: str,
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ipv4: str | None,
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ipv6: str | None,
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update_ipv4: bool = True,
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update_ipv6: bool = True,
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) -> UpdateResult:
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now = datetime.now(UTC).isoformat()
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with self.connect() as conn:
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conn.row_factory = sqlite3.Row
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existing = conn.execute("SELECT ipv4, ipv6 FROM records WHERE hostname = ?", (hostname,)).fetchone()
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current_ipv4 = existing["ipv4"] if existing else None
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current_ipv6 = existing["ipv6"] if existing else None
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effective_ipv4 = ipv4 if update_ipv4 else current_ipv4
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effective_ipv6 = ipv6 if update_ipv6 else current_ipv6
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changed = existing is None or current_ipv4 != effective_ipv4 or current_ipv6 != effective_ipv6
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conn.execute(
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"""
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INSERT INTO records(hostname, ipv4, ipv6, updated_at)
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VALUES (?, ?, ?, ?)
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ON CONFLICT(hostname) DO UPDATE SET
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ipv4=excluded.ipv4,
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ipv6=excluded.ipv6,
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updated_at=excluded.updated_at
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""",
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(hostname, effective_ipv4, effective_ipv6, now),
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)
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return UpdateResult(
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hostname=hostname,
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ipv4=effective_ipv4,
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ipv6=effective_ipv6,
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changed=changed,
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update_ipv4=update_ipv4,
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update_ipv6=update_ipv6,
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)
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def commit_update_result(self, result: UpdateResult) -> UpdateResult:
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now = datetime.now(UTC).isoformat()
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with self.connect() as conn:
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conn.execute(
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"""
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INSERT INTO records(hostname, ipv4, ipv6, updated_at)
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VALUES (?, ?, ?, ?)
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ON CONFLICT(hostname) DO UPDATE SET
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ipv4=excluded.ipv4,
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ipv6=excluded.ipv6,
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updated_at=excluded.updated_at
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""",
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(result.hostname, result.ipv4, result.ipv6, now),
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)
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return result
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def preview_update(
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self,
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hostname: str,
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ipv4: str | None,
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ipv6: str | None,
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update_ipv4: bool = True,
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update_ipv6: bool = True,
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) -> UpdateResult:
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with self.connect() as conn:
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conn.row_factory = sqlite3.Row
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existing = conn.execute("SELECT ipv4, ipv6 FROM records WHERE hostname = ?", (hostname,)).fetchone()
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current_ipv4 = existing["ipv4"] if existing else None
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current_ipv6 = existing["ipv6"] if existing else None
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effective_ipv4 = ipv4 if update_ipv4 else current_ipv4
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effective_ipv6 = ipv6 if update_ipv6 else current_ipv6
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changed = existing is None or current_ipv4 != effective_ipv4 or current_ipv6 != effective_ipv6
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return UpdateResult(
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hostname=hostname,
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ipv4=effective_ipv4,
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ipv6=effective_ipv6,
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changed=changed,
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update_ipv4=update_ipv4,
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update_ipv6=update_ipv6,
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)
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def list_records(self) -> list[dict[str, str | None]]:
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return self.list_records_page(limit=10_000, offset=0)
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def list_records_page(self, limit: int = 100, offset: int = 0) -> list[dict[str, str | None]]:
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with self.connect() as conn:
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conn.row_factory = sqlite3.Row
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rows = conn.execute(
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"""
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SELECT hostname, ipv4, ipv6, updated_at
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FROM records
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ORDER BY hostname
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LIMIT ? OFFSET ?
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""",
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(limit, offset),
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).fetchall()
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return [dict(row) for row in rows]
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def count_records(self) -> int:
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with self.connect() as conn:
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row = conn.execute("SELECT COUNT(*) FROM records").fetchone()
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return int(row[0])
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def log_update_event(
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self,
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hostname: str,
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ipv4: str | None,
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ipv6: str | None,
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status: str,
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detail: str,
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source_ip: str,
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) -> None:
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with self.connect() as conn:
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conn.execute(
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"""
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INSERT INTO update_events(hostname, ipv4, ipv6, status, detail, source_ip, created_at)
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VALUES (?, ?, ?, ?, ?, ?, ?)
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""",
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(hostname, ipv4, ipv6, status, detail[:500], source_ip, datetime.now(UTC).isoformat()),
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)
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def log_update_rollup(
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self,
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hostname: str,
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ipv4: str | None,
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ipv6: str | None,
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status: str,
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detail: str,
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source_ip: str,
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) -> None:
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now = datetime.now(UTC).isoformat()
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with self.connect() as conn:
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conn.execute(
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"""
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INSERT INTO update_event_rollups(
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hostname, ipv4, ipv6, status, detail, source_ip, first_seen_at, last_seen_at, count
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)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?, 1)
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ON CONFLICT(hostname, ipv4, ipv6, status, detail, source_ip) DO UPDATE SET
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last_seen_at=excluded.last_seen_at,
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count=count + 1
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""",
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(hostname, ipv4 or "", ipv6 or "", status, detail[:500], source_ip, now, now),
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)
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def list_update_events(self, limit: int = 100, offset: int = 0) -> list[UpdateEventRow]:
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return self.list_update_events_page(limit=limit, offset=offset)
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def list_update_events_page(self, limit: int = 100, offset: int = 0) -> list[UpdateEventRow]:
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source_limit = limit + offset
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with self.connect() as conn:
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conn.row_factory = sqlite3.Row
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event_rows = conn.execute(
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"""
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SELECT hostname, ipv4, ipv6, status, detail, source_ip, created_at, 1 AS count
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FROM update_events
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ORDER BY created_at DESC
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LIMIT ? OFFSET ?
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""",
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(source_limit, 0),
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).fetchall()
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rollup_rows = conn.execute(
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"""
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SELECT hostname, ipv4, ipv6, status, detail, source_ip, last_seen_at AS created_at, count
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FROM update_event_rollups
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ORDER BY last_seen_at DESC
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LIMIT ? OFFSET ?
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""",
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(source_limit, 0),
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).fetchall()
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return _merge_event_rows(event_rows, rollup_rows, limit, offset)
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def count_update_events(self) -> int:
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with self.connect() as conn:
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event_count = conn.execute("SELECT COUNT(*) FROM update_events").fetchone()[0]
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rollup_count = conn.execute("SELECT COUNT(*) FROM update_event_rollups").fetchone()[0]
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return int(event_count) + int(rollup_count)
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def list_update_events_for_hostname(self, hostname: str, limit: int = 25) -> list[UpdateEventRow]:
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with self.connect() as conn:
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conn.row_factory = sqlite3.Row
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event_rows = conn.execute(
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"""
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SELECT hostname, ipv4, ipv6, status, detail, source_ip, created_at, 1 AS count
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FROM update_events
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WHERE hostname = ?
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ORDER BY created_at DESC
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LIMIT ?
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""",
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(hostname, limit),
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).fetchall()
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rollup_rows = conn.execute(
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"""
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SELECT hostname, ipv4, ipv6, status, detail, source_ip, last_seen_at AS created_at, count
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FROM update_event_rollups
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WHERE hostname = ?
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ORDER BY last_seen_at DESC
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LIMIT ?
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""",
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(hostname, limit),
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).fetchall()
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return _merge_event_rows(event_rows, rollup_rows, limit, 0)
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def _merge_event_rows(
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event_rows: list[sqlite3.Row],
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rollup_rows: list[sqlite3.Row],
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limit: int,
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offset: int,
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) -> list[UpdateEventRow]:
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rows = [dict(row) for row in event_rows]
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rows.extend(dict(row) for row in rollup_rows)
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rows.sort(key=lambda row: str(row["created_at"]), reverse=True)
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return rows[offset : offset + limit]
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