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Python

from __future__ import annotations
from collections.abc import Mapping, Sequence
from dataclasses import dataclass
from datetime import datetime
from urllib.parse import urlencode
from ..security import admin_csrf_token
from ..settings import DdnsSettings
from ..store import DdnsStore
from .html_utils import SafeHtml, attr, escape, trusted
from .layout import PageOptions, _page, _top_nav
from .templates_admin_tables import (
_account_row,
_admin_table_pagination,
_admin_table_toolbar,
_event_row,
)
@dataclass(frozen=True)
class _CleanupSummary:
last_run: object
next_run: object
status: object
last_error: object
interval_seconds: object
accounts_removed: object
@dataclass(frozen=True)
class AdminPageContext:
accounts: Sequence[Mapping[str, object]]
cleanup_runs: Sequence[Mapping[str, object]]
scheduled_tasks: Sequence[Mapping[str, object]]
update_events: Sequence[Mapping[str, object]]
service_metrics: dict[str, float]
table_counts: dict[str, int]
table_offsets: dict[str, int]
table_limit: int
notice_html: SafeHtml | None
def _admin_page_context(
store: DdnsStore,
table_offsets: dict[str, int],
table_limit: int,
notice_html: SafeHtml | None,
) -> AdminPageContext:
return AdminPageContext(
accounts=store.list_accounts(limit=table_limit, offset=table_offsets.get("accounts", 0)),
cleanup_runs=store.list_cleanup_runs(limit=table_limit, offset=table_offsets.get("cleanup_runs", 0)),
scheduled_tasks=store.list_scheduled_tasks(),
update_events=store.list_update_events(table_limit, offset=table_offsets.get("update_events", 0)),
service_metrics=store.get_service_metrics(),
table_counts={
"accounts": store.count_accounts(),
"cleanup_runs": store.count_cleanup_runs(),
"update_events": store.count_update_events(),
},
table_offsets=table_offsets,
table_limit=table_limit,
notice_html=notice_html,
)
def _admin_secret_panel(title: str, rows: list[SafeHtml]) -> SafeHtml:
return trusted(f"""
<section class="section success-section">
<div class="container">
<p class="eyebrow">Admin action</p>
<h2>{escape(title)}</h2>
<p class="section-copy">Copy these values now. Secret values are only shown once.</p>
<div class="d-grid gap-2">
{"".join(rows)}
</div>
</div>
</section>
""")
def _render_admin_page(
settings: DdnsSettings,
context: AdminPageContext,
) -> str:
csrf = attr(admin_csrf_token(settings))
admin_path = settings.admin_path
safe_admin_path = attr(admin_path)
rows = _account_rows(context.accounts, csrf=csrf, admin_path=admin_path)
event_rows = _event_rows(context.update_events)
accounts_count = escape(context.table_counts.get("accounts", len(context.accounts)))
event_count = escape(context.table_counts.get("update_events", len(context.update_events)))
metrics_html = _metrics_panel(context.service_metrics)
account_pager = _server_page_links(
admin_path,
"accounts_offset",
context.table_offsets.get("accounts", 0),
context.table_limit,
context.table_counts.get("accounts", 0),
)
event_pager = _server_page_links(
admin_path,
"update_events_offset",
context.table_offsets.get("update_events", 0),
context.table_limit,
context.table_counts.get("update_events", 0),
)
cleanup_panel = _cleanup_panel(settings, context.cleanup_runs, context.scheduled_tasks, safe_admin_path, csrf)
totals_html = _totals_strip(context.table_counts, context.service_metrics)
title_section = _admin_title_section(totals_html)
status_section = _admin_status_section(cleanup_panel, metrics_html)
hostnames_section = _admin_hostnames_section(context, rows, accounts_count, account_pager)
events_section = _admin_events_section(context, event_rows, event_count, event_pager)
return _page(
"KarlDNS Admin",
trusted(f"""
<main id="main">
{_top_nav("Operator")}
{title_section}
{context.notice_html or ""}
{status_section}
{hostnames_section}
{events_section}
</main>
"""),
PageOptions(
extra_styles=trusted('<link href="/admin.css?v=5" rel="stylesheet">'),
extra_scripts=trusted('<script src="/admin-tables.js?v=3" defer></script>'),
),
)
def _admin_title_section(totals_html: SafeHtml) -> SafeHtml:
return trusted(f"""
<section class="admin-console">
<div class="container">
<div class="admin-page-title">
<div>
<p class="eyebrow">KarlDNS</p>
<h1>Operator console</h1>
</div>
{totals_html}
</div>
</div>
</section>
""")
def _admin_status_section(cleanup_panel: SafeHtml, metrics_html: SafeHtml) -> SafeHtml:
return trusted(f"""
<section class="admin-block">
<div class="container">
{cleanup_panel}
{metrics_html}
</div>
</section>
""")
def _admin_hostnames_section(
context: AdminPageContext,
rows: SafeHtml,
accounts_count: str,
account_pager: SafeHtml,
) -> SafeHtml:
return trusted(f"""
<section class="admin-block">
<div class="container">
<div class="admin-section-heading">
<div>
<h2>Hostnames</h2>
<p class="section-copy mb-0">{escape(len(context.accounts))} of {accounts_count} shown.</p>
</div>
</div>
{_admin_table_toolbar("hostnames", "Filter visible hostnames")}
<div class="table-responsive border rounded admin-table-scroll" data-slot="card">
<table class="table mb-0">
<thead>
<tr>
<th scope="col">Hostname</th>
<th scope="col">Status</th>
<th scope="col">IPv4</th>
<th scope="col">IPv6</th>
<th scope="col">Updated</th>
<th scope="col">Links</th>
<th scope="col">Actions</th>
</tr>
</thead>
<tbody>{rows}</tbody>
</table>
</div>
{_admin_table_pagination()}
{account_pager}
</div>
</section>
""")
def _admin_events_section(
context: AdminPageContext,
event_rows: SafeHtml,
event_count: str,
event_pager: SafeHtml,
) -> SafeHtml:
return trusted(f"""
<section class="admin-block">
<div class="container">
<div class="admin-section-heading">
<div>
<h2>Update events</h2>
<p class="section-copy mb-0">
{escape(len(context.update_events))} of {event_count} shown. Unchanged checks are grouped.
</p>
</div>
</div>
{_admin_table_toolbar("update-events", "Filter visible update events")}
<div class="table-responsive border rounded admin-table-scroll" data-slot="card">
<table class="table mb-0">
<thead>
<tr>
<th scope="col">Time</th>
<th scope="col">Hostname</th>
<th scope="col">Status</th>
<th scope="col">IPv4</th>
<th scope="col">IPv6</th>
<th scope="col">Count</th>
<th scope="col">Detail</th>
</tr>
</thead>
<tbody>{event_rows}</tbody>
</table>
</div>
{_admin_table_pagination()}
{event_pager}
</div>
</section>
""")
def _account_rows(accounts: Sequence[Mapping[str, object]], *, csrf: str, admin_path: str) -> SafeHtml:
return trusted("\n".join(_account_row(account, csrf=csrf, admin_path=admin_path) for account in accounts) or """
<tr class="empty-row">
<td colspan="7" class="empty">
<div class="empty-state">
<div class="empty-state-title">No hostnames yet.</div>
<div class="empty-state-description">
Generated hostnames appear here after users create or register them.
</div>
</div>
</td>
</tr>
""")
def _event_rows(events: Sequence[Mapping[str, object]]) -> SafeHtml:
return trusted("\n".join(_event_row(event) for event in events) or """
<tr class="empty-row">
<td colspan="7" class="empty">
<div class="empty-state">
<div class="empty-state-title">No update events yet.</div>
<div class="empty-state-description">
Router update activity and DNS publish results will appear here.
</div>
</div>
</td>
</tr>
""")
def _totals_strip(table_counts: dict[str, int], metrics: dict[str, float]) -> SafeHtml:
items = [
("Hostnames", table_counts.get("accounts", 0)),
("Events", table_counts.get("update_events", 0)),
("DNS failures", int(metrics.get("dns_failures_total", 0))),
("Blocked", int(metrics.get("rate_limit_hits_total", 0))),
]
return trusted(
'<div class="admin-total-strip" aria-label="Service totals">'
+ "".join(f"<span><strong>{escape(value)}</strong>{escape(label)}</span>" for label, value in items)
+ "</div>"
)
def _admin_notice(kind: str, message: str) -> SafeHtml:
alert_class = "alert-success" if kind == "success" else "alert-info"
return trusted(f"""
<div class="container">
<div class="alert {alert_class} ui-alert admin-notice" role="status" data-slot="alert">{escape(message)}</div>
</div>
""")
def _server_page_links(admin_path: str, offset_name: str, offset: int, limit: int, total: int) -> SafeHtml:
if total <= limit:
return trusted("")
previous_offset = max(0, offset - limit)
next_offset = offset + limit
previous_disabled = " disabled" if offset <= 0 else ""
next_disabled = " disabled" if next_offset >= total else ""
previous_href = attr(f"{admin_path}?{urlencode({offset_name: previous_offset})}")
next_href = attr(f"{admin_path}?{urlencode({offset_name: next_offset})}")
start = min(offset + 1, total)
end = min(offset + limit, total)
return trusted(f"""
<nav class="d-flex align-items-center justify-content-end gap-2 mt-2" aria-label="Server-side table pages">
<span class="small text-secondary">{escape(start)}-{escape(end)} of {escape(total)}</span>
<a class="btn btn-sm btn-light rounded-pill{previous_disabled}" href="{previous_href}"
aria-disabled="{str(offset <= 0).lower()}">Previous</a>
<a class="btn btn-sm btn-light rounded-pill{next_disabled}" href="{next_href}"
aria-disabled="{str(next_offset >= total).lower()}">Next</a>
</nav>
""")
def _cleanup_panel(
settings: DdnsSettings,
cleanup_runs: Sequence[Mapping[str, object]],
scheduled_tasks: Sequence[Mapping[str, object]],
safe_admin_path: str,
csrf: str,
) -> SafeHtml:
summary = _cleanup_summary(
cleanup_runs=cleanup_runs,
scheduled_tasks=scheduled_tasks,
fallback_interval_seconds=settings.cleanup_interval_seconds,
)
error_html = (
trusted(f'<p class="small text-danger mb-0">Last error: {escape(summary.last_error)}</p>')
if summary.last_error
else trusted("")
)
last_run_title = attr(str(summary.last_run or "Never"))
next_run_title = attr(str(summary.next_run or "Pending"))
last_run_display = escape(_format_timestamp(summary.last_run, "Never"))
next_run_display = escape(_format_timestamp(summary.next_run, "Pending"))
return trusted(f"""
<div class="admin-cleanup-bar">
<div class="admin-cleanup-title">
<h2>Cleanup</h2>
<span>Every {escape(_format_interval(summary.interval_seconds))}</span>
</div>
<dl class="admin-cleanup-times">
<div><dt>Last run</dt><dd title="{last_run_title}">{last_run_display}</dd></div>
<div><dt>Next run</dt><dd title="{next_run_title}">{next_run_display}</dd></div>
<div><dt>Status</dt><dd>{escape(str(summary.status))}</dd></div>
<div><dt>Removed</dt><dd>{escape(summary.accounts_removed)}</dd></div>
</dl>
{error_html}
<form method="post" action="{safe_admin_path}/cleanup" aria-label="Run cleanup now">
<input type="hidden" name="csrf" value="{csrf}">
<button type="submit" class="btn btn-primary rounded-pill">Run now</button>
</form>
</div>
""")
def _cleanup_task(scheduled_tasks: Sequence[Mapping[str, object]]) -> Mapping[str, object]:
return next(
(item for item in scheduled_tasks if item.get("name") == "cleanup"),
scheduled_tasks[0] if scheduled_tasks else {},
)
def _cleanup_summary(
*,
cleanup_runs: Sequence[Mapping[str, object]],
scheduled_tasks: Sequence[Mapping[str, object]],
fallback_interval_seconds: int,
) -> _CleanupSummary:
task = _cleanup_task(scheduled_tasks)
last_cleanup = cleanup_runs[0] if cleanup_runs else {}
return _CleanupSummary(
last_run=_cleanup_last_run(task, last_cleanup),
next_run=task.get("next_run_at"),
status=task.get("last_status") or "pending",
last_error=task.get("last_error") or "",
interval_seconds=task.get("interval_seconds") or fallback_interval_seconds,
accounts_removed=_cleanup_accounts_removed(last_cleanup),
)
def _cleanup_last_run(task: Mapping[str, object], last_cleanup: Mapping[str, object]) -> object:
return task.get("last_finished_at") or last_cleanup.get("created_at")
def _cleanup_accounts_removed(last_cleanup: Mapping[str, object]) -> object:
return last_cleanup.get("unused_accounts_deleted", 0)
def _metrics_panel(metrics: dict[str, float]) -> SafeHtml:
samples = metrics.get("update_latency_samples_total", 0)
average_latency = metrics.get("update_latency_ms_total", 0) / samples if samples else 0
items = [
("Updates", _metric_int(metrics.get("update_requests_total", 0))),
("Updated", _metric_int(metrics.get("update_success_total", 0))),
("DNS failures", _metric_int(metrics.get("dns_failures_total", 0))),
("DNS check failures", _metric_int(metrics.get("dns_reconcile_failures_total", 0))),
("Blocked requests", _metric_int(metrics.get("rate_limit_hits_total", 0))),
("Average update time", f"{average_latency:.1f} ms"),
("Last update time", f"{metrics.get('last_update_latency_ms', 0):.1f} ms"),
(
"Cleanup ok/errors",
(
f"{_metric_int(metrics.get('cleanup_success_total', 0))}/"
f"{_metric_int(metrics.get('cleanup_errors_total', 0))}"
),
),
]
cards = "\n".join(f"""
<span><strong>{escape(value)}</strong>{escape(label)}</span>
""" for label, value in items)
return trusted(f"""
<div class="admin-metric-strip" aria-label="Service metrics">
{cards}
</div>
""")
def _metric_int(value: object) -> str:
try:
return str(int(float(str(value))))
except ValueError:
return "0"
def _format_interval(seconds: object) -> str:
try:
value = int(str(seconds))
except (TypeError, ValueError):
return str(seconds)
if value % 3600 == 0:
hours = value // 3600
return f"{hours}h"
if value % 60 == 0:
minutes = value // 60
return f"{minutes}m"
return f"{value}s"
def _format_timestamp(value: object, fallback: str = "-") -> str:
if not value:
return fallback
raw = str(value)
try:
parsed = datetime.fromisoformat(raw)
except ValueError:
return raw
return parsed.strftime("%Y-%m-%d %H:%M")