713a758c83
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Add a read-only web dashboard at GET / that displays: - Summary counts for all monitored resources - Domain nameserver state with per-NS records and status - Hostname DNS records per authoritative nameserver - TCP port open/closed state with associated hostnames - TLS certificate details (CN, issuer, expiry, status) - Last 100 alerts in reverse chronological order Every data point shows relative age (e.g. '5m ago') for freshness. Page auto-refreshes every 30 seconds via meta refresh. Uses Tailwind CSS via CDN for a dark, technical aesthetic with saturated teals and blues on dark slate. Single page, no navigation. Implementation: - internal/notify/history.go: thread-safe ring buffer (last 100 alerts) - internal/notify/notify.go: record alerts in history before dispatch, refactor SendNotification into smaller dispatch helpers (funlen) - internal/handlers/dashboard.go: template rendering with embedded HTML, helper functions for relative time, record formatting, expiry days - internal/handlers/templates/dashboard.html: Tailwind-styled dashboard - internal/handlers/handlers.go: add State and Notify dependencies - internal/server/routes.go: register GET / dashboard route - README.md: document dashboard and new / endpoint No secrets (webhook URLs, API tokens, notification endpoints) are exposed in the dashboard. closes #82
89 lines
1.5 KiB
Go
89 lines
1.5 KiB
Go
package notify_test
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import (
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"testing"
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"time"
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"sneak.berlin/go/dnswatcher/internal/notify"
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)
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func TestAlertHistoryEmpty(t *testing.T) {
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t.Parallel()
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h := notify.NewAlertHistory()
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entries := h.Recent()
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if len(entries) != 0 {
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t.Fatalf("expected 0 entries, got %d", len(entries))
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}
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}
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func TestAlertHistoryAddAndRecent(t *testing.T) {
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t.Parallel()
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h := notify.NewAlertHistory()
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now := time.Now().UTC()
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h.Add(notify.AlertEntry{
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Timestamp: now.Add(-2 * time.Minute),
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Title: "first",
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Message: "msg1",
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Priority: "info",
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})
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h.Add(notify.AlertEntry{
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Timestamp: now.Add(-1 * time.Minute),
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Title: "second",
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Message: "msg2",
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Priority: "warning",
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})
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entries := h.Recent()
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if len(entries) != 2 {
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t.Fatalf("expected 2 entries, got %d", len(entries))
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}
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// Newest first.
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if entries[0].Title != "second" {
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t.Errorf(
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"expected newest first, got %q", entries[0].Title,
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)
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}
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if entries[1].Title != "first" {
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t.Errorf(
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"expected oldest second, got %q", entries[1].Title,
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)
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}
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}
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func TestAlertHistoryOverflow(t *testing.T) {
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t.Parallel()
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h := notify.NewAlertHistory()
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const totalEntries = 110
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// Fill beyond capacity.
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for i := range totalEntries {
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h.Add(notify.AlertEntry{
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Timestamp: time.Now().UTC(),
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Title: "alert",
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Message: "msg",
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Priority: string(rune('0' + i%10)),
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})
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}
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entries := h.Recent()
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const maxHistory = 100
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if len(entries) != maxHistory {
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t.Fatalf(
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"expected %d entries, got %d",
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maxHistory, len(entries),
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)
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}
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}
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