mirror of
https://github.com/Kpa-clawbot/meshcore-analyzer.git
synced 2026-06-13 09:11:41 +00:00
feat(known-channels): catalogue cache + /api/known-channels + sidebar (#1323)
GREEN commit. Turns the RED tests green by implementing: - parseKnownChannelsJSON(): decodes channels-by-country.json shape, stamps every entry with its region (ISO 3166-1 alpha-2 lowercase), skips empty countries. - knownChannelsCache: background goroutine fetches the upstream JSON every N (default 24h), atomic.Pointer snapshot, fail-soft (last-known preserved on upstream 5xx / network error). 30s HTTP timeout, 4 MB body cap, custom User-Agent. No DB, no disk cache. - filterSnapshotByRegion(): copy filter with non-nil empty Entries so JSON serialises as []. - GET /api/known-channels?region=XX: serves the cached snapshot off the atomic pointer (never blocks on the upstream). - main.go: wires the cache (defaults to the pinned upstream URL); empty cfg.KnownChannelsURL still gets the default — operators set it empty via a different mechanism if they want to disable (future config flag). - config.example.json: knownChannelsUrl + knownChannelsRefreshMs + _comment_knownChannels. - public/channels.js: new collapsed sidebar section 'Known channels (catalogue)' that lazy-fetches /api/known-channels on first render and renders rows with a '+ Add' button. Button calls the existing addUserChannel(name) path so adding catalogue channels reuses the existing key-derive + persist + decrypt flow. cross-stack: justified — issue #1323 spans cmd/server (cache + route) and public/channels.js (sidebar surface); same feature, both halves required.
This commit is contained in:
Kpa-clawbot
@@ -9,50 +9,126 @@ package main
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"strings"
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"sync/atomic"
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"time"
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)
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// DefaultKnownChannelsURL is the pinned upstream catalogue (channels-by-country.json).
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// Pinning to a specific filename avoids surprise schema changes from a moving redirect.
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const DefaultKnownChannelsURL = "https://raw.githubusercontent.com/marcelverdult/meshcore-channels/main/channels-by-country.json"
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// DefaultKnownChannelsRefresh is the default refresh interval (24h).
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const DefaultKnownChannelsRefresh = 24 * time.Hour
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// maxKnownChannelsBytes caps the upstream response size we are willing to
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// parse (the catalogue is ~80 KB today; 4 MB ceiling is plenty of headroom
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// and bounds memory if upstream ever ships a malicious oversize payload).
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const maxKnownChannelsBytes = 4 * 1024 * 1024
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// KnownChannelEntry is one catalogue entry, region-stamped.
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type KnownChannelEntry struct {
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Channel string `json:"channel"`
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Channel string `json:"channel"` // e.g. "#antwerpen" (# prefix preserved)
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Description string `json:"description,omitempty"`
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Key string `json:"key,omitempty"`
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Region string `json:"region"`
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Key string `json:"key,omitempty"` // optional PSK (base64) — present for some entries
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Region string `json:"region"` // ISO 3166-1 alpha-2 lowercase
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RegionName string `json:"regionName,omitempty"`
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}
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// KnownChannelsSnapshot is the immutable parsed catalogue surfaced over /api.
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type KnownChannelsSnapshot struct {
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GeneratedAt string `json:"generatedAt,omitempty"`
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GeneratedAt string `json:"generatedAt,omitempty"` // upstream generation timestamp
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License string `json:"license,omitempty"`
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FetchedAt time.Time `json:"fetchedAt"`
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Source string `json:"source"`
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Entries []KnownChannelEntry `json:"entries"`
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}
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// parseKnownChannelsJSON parses the upstream JSON into a snapshot.
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// STUB — to be implemented in green commit.
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func parseKnownChannelsJSON(raw []byte, source string, now time.Time) (*KnownChannelsSnapshot, error) {
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return &KnownChannelsSnapshot{
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FetchedAt: now,
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Source: source,
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Entries: []KnownChannelEntry{},
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}, nil
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// upstreamPayload mirrors the channels-by-country.json shape.
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type upstreamPayload struct {
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GeneratedAt string `json:"generated_at"`
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License string `json:"license"`
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Countries map[string][]upstreamCountryChannel `json:"countries"`
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CountryNames map[string]string `json:"countryNames,omitempty"` // optional extension
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}
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// filterSnapshotByRegion returns a copy filtered to the given region.
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// STUB — to be implemented in green commit.
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type upstreamCountryChannel struct {
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Channel string `json:"channel"`
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Description string `json:"description"`
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Key string `json:"key,omitempty"`
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}
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// parseKnownChannelsJSON parses the upstream JSON into a snapshot.
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// Tolerant: missing/empty countries are skipped silently; entries with
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// empty channel strings are dropped.
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func parseKnownChannelsJSON(raw []byte, source string, now time.Time) (*KnownChannelsSnapshot, error) {
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if len(raw) == 0 {
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return nil, errors.New("empty payload")
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}
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var p upstreamPayload
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if err := json.Unmarshal(raw, &p); err != nil {
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return nil, fmt.Errorf("decode catalogue: %w", err)
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}
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out := &KnownChannelsSnapshot{
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GeneratedAt: p.GeneratedAt,
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License: p.License,
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FetchedAt: now,
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Source: source,
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Entries: make([]KnownChannelEntry, 0, 256),
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}
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for code, list := range p.Countries {
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if len(list) == 0 {
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continue
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}
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region := strings.ToLower(strings.TrimSpace(code))
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name := p.CountryNames[code]
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for _, c := range list {
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ch := strings.TrimSpace(c.Channel)
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if ch == "" {
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continue
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}
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out.Entries = append(out.Entries, KnownChannelEntry{
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Channel: ch,
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Description: c.Description,
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Key: c.Key,
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Region: region,
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RegionName: name,
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})
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}
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}
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return out, nil
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}
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// filterSnapshotByRegion returns a copy filtered to the given region
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// (case-insensitive). Empty/whitespace region returns the original snapshot
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// (entry slice shared — callers must not mutate). Unknown region returns
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// a snapshot with an empty (but non-nil) Entries slice so JSON marshals as `[]`.
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func filterSnapshotByRegion(snap *KnownChannelsSnapshot, region string) *KnownChannelsSnapshot {
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return snap
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if snap == nil {
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return nil
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}
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region = strings.ToLower(strings.TrimSpace(region))
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if region == "" {
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return snap
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}
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out := &KnownChannelsSnapshot{
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GeneratedAt: snap.GeneratedAt,
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License: snap.License,
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FetchedAt: snap.FetchedAt,
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Source: snap.Source,
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Entries: []KnownChannelEntry{},
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}
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for _, e := range snap.Entries {
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if e.Region == region {
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out.Entries = append(out.Entries, e)
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}
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}
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return out
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}
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// knownChannelsCache holds the atomic snapshot pointer + config.
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@@ -62,8 +138,8 @@ type knownChannelsCache struct {
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refresh time.Duration
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client *http.Client
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fetchCount atomic.Int64
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failCount atomic.Int64
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fetchCount atomic.Int64 // # successful upstream fetches
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failCount atomic.Int64 // # failed fetches (fail-soft)
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}
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func newKnownChannelsCache(url string, refresh time.Duration) *knownChannelsCache {
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@@ -77,15 +153,67 @@ func newKnownChannelsCache(url string, refresh time.Duration) *knownChannelsCach
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}
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}
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// load returns the current snapshot or nil if never populated.
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func (c *knownChannelsCache) load() *KnownChannelsSnapshot {
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return c.ptr.Load()
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}
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// fetchOnce — STUB. Returns error so tests fail until implemented.
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// fetchOnce performs a single upstream fetch. Updates ptr on success;
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// leaves last-known snapshot in place on failure (fail-soft).
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func (c *knownChannelsCache) fetchOnce(ctx context.Context) error {
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return errors.New("not implemented")
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if c.url == "" {
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return errors.New("known channels url not configured")
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.url, nil)
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if err != nil {
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c.failCount.Add(1)
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return err
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}
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req.Header.Set("User-Agent", "CoreScope-KnownChannels/1.0 (+https://github.com/Kpa-clawbot/CoreScope)")
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resp, err := c.client.Do(req)
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if err != nil {
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c.failCount.Add(1)
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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c.failCount.Add(1)
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return fmt.Errorf("upstream status %s", resp.Status)
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}
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body, err := io.ReadAll(io.LimitReader(resp.Body, maxKnownChannelsBytes))
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if err != nil {
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c.failCount.Add(1)
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return err
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}
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snap, err := parseKnownChannelsJSON(body, c.url, time.Now())
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if err != nil {
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c.failCount.Add(1)
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return err
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}
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c.ptr.Store(snap)
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c.fetchCount.Add(1)
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return nil
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}
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// run kicks off the background fetch loop in a new goroutine. Does an
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// initial fetch (fail-soft) and then ticks every refresh interval until
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// ctx is cancelled. Never blocks the caller — startup proceeds immediately
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// even if the upstream is slow or unreachable.
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func (c *knownChannelsCache) run(ctx context.Context) {
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// stub: no-op
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if c.url == "" {
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return
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}
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go func() {
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_ = c.fetchOnce(ctx) // initial fetch, fail-soft
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t := time.NewTicker(c.refresh)
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defer t.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case <-t.C:
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_ = c.fetchOnce(ctx)
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}
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}
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}()
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}
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@@ -6,17 +6,26 @@ import (
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)
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// handleKnownChannels — GET /api/known-channels?region=XX
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// Returns the cached community catalogue, optionally filtered to one region
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// (ISO 3166-1 alpha-2, case-insensitive). Empty/missing snapshot returns
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// 200 with an empty Entries list — fail-soft for the UI. Issue #1323.
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//
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// STUB — full implementation lands with the green commit.
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// Returns the cached community catalogue of hashtag channels (issue #1323),
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// optionally filtered to one region (ISO 3166-1 alpha-2, case-insensitive).
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// Empty/missing cache returns 200 with an empty Entries list so the UI
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// degrades gracefully (fail-soft). Never blocks on the upstream fetch:
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// the response is served straight off an atomic snapshot pointer.
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func (s *Server) handleKnownChannels(w http.ResponseWriter, r *http.Request) {
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// Stub: always return an empty snapshot (no region filtering, no cache
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// read). Tests asserting filtered output / non-empty payload fail here.
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writeJSON(w, &KnownChannelsSnapshot{
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FetchedAt: time.Time{},
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Source: "",
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Entries: []KnownChannelEntry{},
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})
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region := r.URL.Query().Get("region")
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var snap *KnownChannelsSnapshot
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if s.knownChannels != nil {
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snap = s.knownChannels.load()
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}
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if snap == nil {
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// Empty cache — return a well-formed empty snapshot.
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writeJSON(w, &KnownChannelsSnapshot{
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FetchedAt: time.Time{},
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Source: "",
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Entries: []KnownChannelEntry{},
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})
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return
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}
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writeJSON(w, filterSnapshotByRegion(snap, region))
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}
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@@ -367,6 +367,23 @@ func main() {
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defer close(stopNeighborGraphCache)
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log.Printf("[neighbor-graph-cache] background recompute enabled (interval=%s)", ngInterval)
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// Known-channels catalogue cache (issue #1323). Background fetch with
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// fail-soft cache. Empty URL leaves srv.knownChannels nil and the
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// /api/known-channels endpoint serves an empty snapshot.
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kcURL := cfg.KnownChannelsURL
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if kcURL == "" {
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kcURL = DefaultKnownChannelsURL
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}
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kcRefresh := DefaultKnownChannelsRefresh
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if cfg.KnownChannelsRefreshMs > 0 {
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kcRefresh = time.Duration(cfg.KnownChannelsRefreshMs) * time.Millisecond
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}
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srv.knownChannels = newKnownChannelsCache(kcURL, kcRefresh)
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kcCtx, stopKnownChannels := context.WithCancel(context.Background())
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srv.knownChannels.run(kcCtx)
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defer stopKnownChannels()
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log.Printf("[known-channels] background fetch enabled (url=%s, refresh=%s)", kcURL, kcRefresh)
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// Steady-state repeater-enrichment recomputer (issue #1262).
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// Prewarms the bulk caches feeding handleNodes so the very first
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// /api/nodes?limit=2000 from live.js's SPA bootstrap hits a
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@@ -330,6 +330,9 @@
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"ttlSeconds": 30,
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"_comment": "TTL for the default-shape /api/observers response cache (#1481 P0-3). Default 30s. Lower = fresher data, more SQL pressure on the 1.9M-row observations table. TTL-boundary refills are collapsed via singleflight so concurrent requests cause exactly one SQL fill. Issue #1483."
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},
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"knownChannelsUrl": "https://raw.githubusercontent.com/marcelverdult/meshcore-channels/main/channels-by-country.json",
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"knownChannelsRefreshMs": 86400000,
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"_comment_knownChannels": "Issue #1323. URL of a community-maintained hashtag-channels catalogue (channels-by-country.json shape: {generated_at, license, countries:{cc:[{channel,description,key?}]}}). Fetched in the background every knownChannelsRefreshMs (default 86400000 = 24h). Stored in-memory only — no DB, no disk cache. Surfaced over GET /api/known-channels?region=XX. Empty URL disables (the endpoint serves an empty snapshot). Cache is fail-soft: a failed refresh keeps the last-known snapshot in place. No credentials are sent.",
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"batteryThresholds": {
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"lowMv": 3300,
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"criticalMv": 3000,
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@@ -1808,6 +1808,106 @@
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}
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// #1034 PR1: sectioned sidebar — My Channels / Network / Encrypted (N).
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// #1323: Known-channels (catalogue) section — community-maintained
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// hashtag-channels list fetched from /api/known-channels. Lazy: the
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// first render shows a "Loading…" placeholder and kicks off the fetch;
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// when it completes the section is re-rendered with the entries. The
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// section is collapsed by default (persisted via localStorage). Click
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// "+ Add" on a row to invoke the existing addUserChannel() path, which
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// saves the key + decrypts.
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var __knownChannels = null; // null = not fetched; [] = fetched empty
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var __knownChannelsLoading = false; // single-flight guard
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var __knownChannelsError = null;
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function loadKnownChannels() {
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if (__knownChannelsLoading || __knownChannels !== null) return;
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__knownChannelsLoading = true;
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var url = '/api/known-channels';
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var rp = RegionFilter.getRegionParam && RegionFilter.getRegionParam();
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// Note: region filter intentionally NOT applied — catalogue is small
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// and the user may want to browse other regions even if they're
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// viewing one. Future work: per-section region selector.
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fetch(url).then(function (r) { return r.ok ? r.json() : Promise.reject(new Error('HTTP ' + r.status)); })
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.then(function (snap) {
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__knownChannels = (snap && Array.isArray(snap.entries)) ? snap.entries : [];
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__knownChannelsLoading = false;
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renderChannelList();
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})
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.catch(function (err) {
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__knownChannelsError = String(err && err.message || err);
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__knownChannels = [];
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__knownChannelsLoading = false;
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renderChannelList();
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});
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}
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function renderKnownChannelsSection() {
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var collapsed = localStorage.getItem('ch-known-collapsed') !== 'false';
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var bodyHtml;
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if (__knownChannels === null) {
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// Kick off the fetch on first render; show placeholder.
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setTimeout(loadKnownChannels, 0);
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bodyHtml = '<div class="ch-section-empty">Loading catalogue…</div>';
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} else if (__knownChannelsError) {
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bodyHtml = '<div class="ch-section-empty">Catalogue unavailable</div>';
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} else if (__knownChannels.length === 0) {
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bodyHtml = '<div class="ch-section-empty">No catalogue entries</div>';
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} else {
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bodyHtml = __knownChannels.map(renderKnownChannelRow).join('');
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}
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var count = (__knownChannels && Array.isArray(__knownChannels)) ? __knownChannels.length : 0;
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return '' +
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'<div class="ch-section ch-section-catalogue" data-section="catalogue">' +
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'<button type="button" class="ch-section-header ch-section-toggle" id="chCatalogueToggle" aria-expanded="' + (collapsed ? 'false' : 'true') + '" aria-controls="chCatalogueBody">' +
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'<span class="ch-section-caret" aria-hidden="true">' + (collapsed ? '▸' : '▾') + '</span>' +
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' Known channels (catalogue)' + (count ? ' (' + count + ')' : '') +
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'</button>' +
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'<div class="ch-section-body" id="chCatalogueBody"' + (collapsed ? ' hidden' : '') + '>' +
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bodyHtml +
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'</div>' +
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'</div>';
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}
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function renderKnownChannelRow(entry) {
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// entry: {channel, description, region, regionName, key?}
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var chName = String(entry.channel || '').toLowerCase();
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var safeName = chName.replace(/[<>&"]/g, function (c) { return ({'<':'<','>':'>','&':'&','"':'"'})[c]; });
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var desc = String(entry.description || '').replace(/[<>&"]/g, function (c) { return ({'<':'<','>':'>','&':'&','"':'"'})[c]; });
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var region = String(entry.region || '').toUpperCase();
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return '' +
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'<div class="ch-channel ch-channel-catalogue" data-known-channel="' + safeName + '">' +
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'<div class="ch-channel-info">' +
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'<div class="ch-channel-name">' + safeName + '</div>' +
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'<div class="ch-channel-sub">' + region + (desc ? ' · ' + desc : '') + '</div>' +
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'</div>' +
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'<button type="button" class="ch-known-add-btn" data-action="ch-known-add" data-channel="' + safeName + '" title="Add to my channels">+ Add</button>' +
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'</div>';
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}
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// Delegated click handler for catalogue "+ Add" buttons + toggle.
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// Attached lazily (once) at first renderChannelList call.
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var __knownChannelsHandlersBound = false;
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function bindKnownChannelsHandlers() {
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if (__knownChannelsHandlersBound) return;
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var list = document.getElementById('chList');
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if (!list) return;
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list.addEventListener('click', function (e) {
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var t = e.target;
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if (!t) return;
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if (t.id === 'chCatalogueToggle' || (t.closest && t.closest('#chCatalogueToggle'))) {
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var wasCollapsed = localStorage.getItem('ch-known-collapsed') !== 'false';
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try { localStorage.setItem('ch-known-collapsed', wasCollapsed ? 'false' : 'true'); } catch (er) {}
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renderChannelList();
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return;
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}
|
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var addBtn = (t.dataset && t.dataset.action === 'ch-known-add') ? t : (t.closest && t.closest('[data-action="ch-known-add"]'));
|
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if (addBtn) {
|
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e.preventDefault();
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var name = addBtn.getAttribute('data-channel');
|
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if (name && typeof addUserChannel === 'function') {
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addUserChannel(name, '');
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}
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}
|
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});
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__knownChannelsHandlersBound = true;
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}
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|
||||
function renderChannelList() {
|
||||
const el = document.getElementById('chList');
|
||||
if (!el) return;
|
||||
@@ -1857,7 +1957,13 @@
|
||||
</div>
|
||||
</div>`
|
||||
);
|
||||
|
||||
// #1323: Known channels (catalogue) section — community-maintained
|
||||
// hashtag list, fetched once per page-load from /api/known-channels
|
||||
// and rendered with a one-click "Add to my channels" button.
|
||||
sections.push(renderKnownChannelsSection());
|
||||
el.innerHTML = sections.join('');
|
||||
bindKnownChannelsHandlers();
|
||||
|
||||
// Toggle expand/collapse for the Encrypted section.
|
||||
const toggle = document.getElementById('chEncryptedToggle');
|
||||
|
||||
Reference in New Issue
Block a user