Two-digit code per color tag, shown as badges on matching log lines

Each tag gets a stable code (01-99) assigned by the server and stored in
tags.json; existing tags get one when the file is loaded. A fixed-width
Filters column shows the codes of the active tags found in each message
(room for 3, then 2 + "+N", all listed in the tooltip).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

README.fr.md

@@ -78,8 +78,8 @@ par exemple `error AND host:web-01`, `app:~"ssh|nginx"` ou `* | stats by (host)
 Le direct est désactivé dans ce mode.
 
 Chaque ligne affiche, de gauche à droite : l'**heure de réception** (horloge du serveur),
-l'horodatage trouvé dans le message lui-même (`msg_time`), la sévérité, l'hôte, l'application
-et le message. Un clic sur un hôte ou une application filtre dessus.
+l'horodatage trouvé dans le message lui-même (`msg_time`), la sévérité, l'hôte, l'application,
+les codes des tags trouvés et le message. Un clic sur un hôte ou une application filtre dessus.
 
 Les logs sont indexés, recherchés et triés par **heure de réception** : les équipements dont
 l'horloge est fausse (par exemple des points d'accès dont le NTP échoue) apparaissent quand même
@@ -235,6 +235,11 @@ couleur, est mémorisé par navigateur.
   ajoutés en double, et les tags ajoutés se modifient comme les autres. Dans une expression
   régulière, un groupe nommé `hl` (`(?<hl>…)`) ne colore que cette partie de la correspondance :
   les préréglages s'en servent pour colorer le code de statut ou la méthode, pas le texte autour.
+  Chaque tag reçoit un code à deux chiffres (`01`, `02`…) attribué par le serveur : il reste
+  attaché au tag jusqu'à sa suppression (les tags créés par les versions précédentes en reçoivent
+  un aussi). La colonne *Filtres* de la liste affiche, en badges gris, les codes des tags actifs
+  trouvés dans chaque message ; elle a la place pour 3, au-delà elle en affiche 2 et `+N`, et
+  l'infobulle les liste tous.
 - **Interface**
   - *Thème* : Système (suit la préférence de l'ordinateur ou du téléphone), Clair ou Sombre. Le
     bouton soleil/lune de l'en-tête bascule entre clair et sombre.

README.md

@@ -72,7 +72,7 @@ message, host and app. Words are combined with AND.
 The live view is disabled in this mode.
 
 Each row shows, from left to right: the **reception time** (server clock), the timestamp
-found in the message itself (`msg_time`), severity, host, app and message. Click a host or an
+found in the message itself (`msg_time`), severity, host, app, codes of the tags found and message. Click a host or an
 app to filter on it.
 
 Logs are indexed, searched and sorted by **reception time**: devices with a wrong clock
@@ -214,6 +214,11 @@ remembered per browser.
   added tags can be edited like any other. In a regular expression, a group named `hl`
   (`(?<hl>…)`) colors only that part of the match: the presets use it to color the status code
   or the method, not the text around it.
+  Each tag gets a two-digit code (`01`, `02`…) assigned by the server: it stays with the tag
+  until the tag is deleted (codes are also given to tags created by earlier versions). The
+  *Filters* column of the log list shows, as grey badges, the codes of the active tags found in
+  each message; it has room for 3, beyond that it shows 2 and `+N`, and the tooltip lists them
+  all.
 - **Interface**
   - *Theme*: System (follows the computer/phone preference), Light or Dark. The sun/moon
     button in the header switches between light and dark.

tags.go

@@ -16,6 +16,7 @@ import (
 // Tag highlights a keyword in displayed messages.
 type Tag struct {
 	ID            string `json:"id"`
+	Code          string `json:"code"` // two digits, shown on matching log lines
 	Pattern       string `json:"pattern"`
 	Label         string `json:"label,omitempty"` // shown instead of the pattern (presets)
 	Color         string `json:"color"`
@@ -27,12 +28,47 @@ type Tag struct {
 
 func defaultTags() []Tag {
 	return []Tag{
-		{ID: "warning", Pattern: "warning", Color: "#fdba74", WholeWord: true, Enabled: true},
-		{ID: "error", Pattern: "error", Color: "#fca5a5", WholeWord: true, Enabled: true},
-		{ID: "ok", Pattern: "ok", Color: "#86efac", WholeWord: true, Enabled: true},
+		{ID: "warning", Code: "01", Pattern: "warning", Color: "#fdba74", WholeWord: true, Enabled: true},
+		{ID: "error", Code: "02", Pattern: "error", Color: "#fca5a5", WholeWord: true, Enabled: true},
+		{ID: "ok", Code: "03", Pattern: "ok", Color: "#86efac", WholeWord: true, Enabled: true},
 	}
 }
 
+var codeRe = regexp.MustCompile(`^[0-9]{2}$`)
+
+// freeCode returns the lowest code from 01 to 99 not used by tags, or "" when
+// all are taken. A code stays with its tag until the tag is deleted.
+func freeCode(tags []Tag) string {
+	used := map[string]bool{}
+	for _, t := range tags {
+		used[t.Code] = true
+	}
+	for n := 1; n <= 99; n++ {
+		if c := fmt.Sprintf("%02d", n); !used[c] {
+			return c
+		}
+	}
+	return ""
+}
+
+// assignCodes gives a code to the tags that have none (files written before
+// codes existed) or share one with an earlier tag.
+func assignCodes(tags []Tag) bool {
+	changed := false
+	seen := map[string]bool{}
+	for i := range tags {
+		if codeRe.MatchString(tags[i].Code) && !seen[tags[i].Code] {
+			seen[tags[i].Code] = true
+			continue
+		}
+		tags[i].Code = ""
+		tags[i].Code = freeCode(tags)
+		seen[tags[i].Code] = true
+		changed = true
+	}
+	return changed
+}
+
 // Colors of the default tags in earlier versions: still unchanged, they are
 // switched to the new pastel defaults when the file is loaded.
 var oldDefaultColors = map[string]string{"warning": "#f59e0b", "error": "#ef4444", "ok": "#22c55e"}
@@ -68,6 +104,7 @@ func (e *codedError) Error() string {
 
 var (
 	errTagNotFound = &codedError{code: "tag_not_found", msg: "tag not found"}
+	errTooManyTags = &codedError{code: "too_many_tags", msg: "too many tags (99 at most)"}
 	colorRe        = regexp.MustCompile(`^#[0-9a-fA-F]{6}$`)
 )
 
@@ -108,7 +145,7 @@ func LoadTagStore(path string) (*TagStore, error) {
 	if err := json.Unmarshal(b, &s.tags); err != nil {
 		return nil, fmt.Errorf("%s: %w", path, err)
 	}
-	if migrateDefaultColors(s.tags) {
+	if c1, c2 := migrateDefaultColors(s.tags), assignCodes(s.tags); c1 || c2 {
 		if err := s.save(); err != nil {
 			return nil, err
 		}
@@ -145,6 +182,9 @@ func (s *TagStore) Create(t Tag) (Tag, error) {
 	t.ID = newID()
 	s.mu.Lock()
 	defer s.mu.Unlock()
+	if t.Code = freeCode(s.tags); t.Code == "" {
+		return t, errTooManyTags
+	}
 	s.tags = append(s.tags, t)
 	return t, s.save()
 }
@@ -158,6 +198,7 @@ func (s *TagStore) Update(id string, t Tag) (Tag, error) {
 	defer s.mu.Unlock()
 	for i := range s.tags {
 		if s.tags[i].ID == id {
+			t.Code = s.tags[i].Code // assigned by the server, never changed
 			s.tags[i] = t
 			return t, s.save()
 		}

tags_test.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"slices"
+	"testing"
+)
+
+func TestTagCodes(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "tags.json")
+	// File written before codes existed, with a duplicate code.
+	old := `[{"id":"a","pattern":"x","color":"#000000"},{"id":"b","code":"07","pattern":"y","color":"#000000"},{"id":"c","code":"07","pattern":"z","color":"#000000"}]`
+	if err := os.WriteFile(path, []byte(old), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	s, err := LoadTagStore(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	got := []string{}
+	for _, tg := range s.List() {
+		got = append(got, tg.Code)
+	}
+	if want := []string{"01", "07", "02"}; !slices.Equal(got, want) {
+		t.Fatalf("migrated codes = %v, want %v", got, want)
+	}
+
+	n, err := s.Create(Tag{Pattern: "w", Color: "#000000"})
+	if err != nil || n.Code != "03" {
+		t.Fatalf("Create code = %q, %v; want 03", n.Code, err)
+	}
+	// The client cannot change a code.
+	u, err := s.Update("b", Tag{Code: "42", Pattern: "y2", Color: "#000000"})
+	if err != nil || u.Code != "07" {
+		t.Fatalf("Update code = %q, %v; want 07", u.Code, err)
+	}
+	// A deleted tag frees its code; the others keep theirs.
+	if err := s.Delete("a"); err != nil {
+		t.Fatal(err)
+	}
+	if n, _ := s.Create(Tag{Pattern: "v", Color: "#000000"}); n.Code != "01" {
+		t.Fatalf("code after delete = %q, want 01", n.Code)
+	}
+
+	// Codes are saved in the file.
+	s2, err := LoadTagStore(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got := s2.List()[0].Code; got != "07" {
+		t.Fatalf("reloaded code = %q, want 07", got)
+	}
+}

web/app.js

@@ -59,6 +59,7 @@ const I18N = {
     err_invalid_color: 'Invalid color (expected #rrggbb)',
     err_invalid_regex: 'Invalid regular expression',
     err_tag_not_found: 'Tag not found',
+    err_too_many_tags: 'Too many tags (99 at most)',
     err_live_logsql: 'Live view is not available in LogsQL mode',
     dateTime: 'Date & time',
     tzLabel: 'Time zone',
@@ -148,7 +149,9 @@ const I18N = {
     hCappedTitle: 'The chosen division would exceed 300 intervals over this range: it has been enlarged.',
     hUnzoom: '× Reset zoom', unitDay: 'd',
     toTop: 'Back to top',
-    colRcv: 'Received', colMt: 'Message time', colSev: 'Severity', colHost: 'Host', colApp: 'App', colMsg: 'Message',
+    colRcv: 'Received', colMt: 'Message time', colSev: 'Severity', colHost: 'Host', colApp: 'App', colCodes: 'Filters', colMsg: 'Message',
+    codesTitle: 'Codes of the color tags found in the message',
+    tagCodeTitle: 'Code shown on the log lines this tag matches',
     colGrip: 'Drag to resize, double-click for the automatic width',
     resetCols: 'Reset column widths', colsReset: 'Column widths reset',
     colsHelp: 'Drag the edge of a column header in the log list to resize it (remembered by this browser).',
@@ -209,6 +212,7 @@ const I18N = {
     err_invalid_color: 'Couleur invalide (format #rrggbb attendu)',
     err_invalid_regex: 'Expression régulière invalide',
     err_tag_not_found: 'Tag introuvable',
+    err_too_many_tags: 'Trop de tags (99 au maximum)',
     err_live_logsql: 'Le direct n\'est pas disponible en mode LogsQL',
     dateTime: 'Date et heure',
     tzLabel: 'Fuseau horaire',
@@ -298,7 +302,9 @@ const I18N = {
     hCappedTitle: 'La division choisie dépasserait 300 intervalles sur cette plage : elle a été élargie.',
     hUnzoom: '× Annuler le zoom', unitDay: 'j',
     toTop: 'Revenir en haut',
-    colRcv: 'Réception', colMt: 'Heure message', colSev: 'Sévérité', colHost: 'Hôte', colApp: 'App', colMsg: 'Message',
+    colRcv: 'Réception', colMt: 'Heure message', colSev: 'Sévérité', colHost: 'Hôte', colApp: 'App', colCodes: 'Filtres', colMsg: 'Message',
+    codesTitle: 'Codes des tags de couleur trouvés dans le message',
+    tagCodeTitle: 'Code affiché sur les lignes de log où ce tag est trouvé',
     colGrip: 'Glisser pour redimensionner, double-clic pour la largeur automatique',
     resetCols: 'Réinitialiser les colonnes', colsReset: 'Largeurs de colonnes réinitialisées',
     colsHelp: 'Glissez le bord d\'un en-tête de colonne de la liste pour la redimensionner (mémorisé par ce navigateur).',
@@ -696,7 +702,8 @@ function compileMatchers() {
       // A regex may name a group "hl" to color only that part of the match.
       const hl = tag.regex && /\(\?P?<hl>/.test(tag.pattern);
       if (hl) src = src.replace(/\(\?P<hl>/g, '(?<hl>');
-      out.push({ re: new RegExp(src, 'gu' + (hl ? 'd' : '') + (tag.caseSensitive ? '' : 'i')), html: `<mark class="tag" style="${tagStyle(tag.color)}">` });
+      out.push({ re: new RegExp(src, 'gu' + (hl ? 'd' : '') + (tag.caseSensitive ? '' : 'i')), html: `<mark class="tag" style="${tagStyle(tag.color)}">`,
+        code: tag.code, name: tag.label || tag.pattern });
     } catch (e) {
       console.warn('Tag skipped (invalid pattern):', tag.pattern, e.message);
     }
@@ -738,6 +745,30 @@ function highlight(text) {
   return out + esc(text.slice(pos));
 }
 
+// Badges with the codes of the tags found in a message, in list order. The
+// column has room for 3: beyond that, 2 badges and "+N" (all in the tooltip).
+function codesHTML(text) {
+  text = String(text ?? '');
+  const found = [];
+  for (const m of state.matchers) {
+    if (!m.code || !text) continue;
+    m.re.lastIndex = 0;
+    let x;
+    while ((x = m.re.exec(text)) !== null) {
+      if (x[0] === '') { m.re.lastIndex++; continue; }
+      const g = x.indices?.groups?.hl;
+      if (!x.indices?.groups || g) { found.push(m); break; }
+    }
+  }
+  if (!found.length) return '';
+  const shown = found.length > 3 ? found.slice(0, 2) : found;
+  const title = found.map((m) => `${m.code} ${m.name}`).join('\n');
+  return `<span title="${esc(title)}">`
+    + shown.map((m) => `<b>${esc(m.code)}</b>`).join('')
+    + (found.length > 3 ? `<b class="more">+${found.length - 2}</b>` : '')
+    + '</span>';
+}
+
 /* ================= List rendering ================= */
 
 const SEV_CLASS = { emerg: 'crit', alert: 'crit', crit: 'crit', err: 'err', warning: 'warning', notice: 'notice', info: 'info', debug: 'debug' };
@@ -763,6 +794,7 @@ function rowHTML(r, isNew) {
     + (r.app
       ? `<span class="app${r.source_type === 'docker' ? ' proj' : ''}" data-act="app"${r.source_type === 'docker' ? ` style="--h:${hueOf(r.compose_project || r.container || r.app)}"` : ''} title="${esc((r.compose_project ? r.compose_project + '/' : '') + (r.container ? r.container + ' · ' : '') + r.app + ' · ' + t('clickApp'))}">${r.source_type === 'docker' ? DOCKER_ICON : ''}${esc(r.app)}</span>`
       : '<span class="app"></span>')
+    + `<span class="codes">${codesHTML(r._msg)}</span>`
     + `<div class="msg">${highlight(r._msg)}</div>`
     + '</article>';
 }
@@ -829,7 +861,9 @@ function renderList() {
 function rehighlight() {
   for (const row of list.children) {
     const r = recOf.get(row);
-    if (r) row.querySelector('.msg').innerHTML = highlight(r._msg);
+    if (!r) continue;
+    row.querySelector('.msg').innerHTML = highlight(r._msg);
+    row.querySelector('.codes').innerHTML = codesHTML(r._msg);
   }
 }
 
@@ -2026,6 +2060,7 @@ function tagRowHTML(tag) {
   const opt = (field, label, title) =>
     `<label class="opt" title="${esc(title)}"><input type="checkbox" data-f="${field}"${tag[field] ? ' checked' : ''}>${esc(label)}</label>`;
   return `<div class="tag-row${tag.enabled ? '' : ' off'}" data-id="${esc(tag.id)}">
+    <span class="tag-code" title="${esc(t('tagCodeTitle'))}">${esc(tag.code || '··')}</span>
     <input type="color" value="${esc(tag.color)}" data-f="color" aria-label="${esc(t('colorAria'))}">
     <input type="text" value="${esc(tag.pattern)}" data-f="pattern" placeholder="${esc(t('keyword'))}" spellcheck="false" aria-label="${esc(t('keyword'))}">
     <span class="preview" title="${esc(tag.pattern)}"><mark class="tag" style="${tagStyle(tag.color)}">${esc(tag.label || tag.pattern || t('preview'))}</mark></span>

web/index.html

@@ -107,6 +107,7 @@
       <span data-col="sev"><span class="lbl" data-i18n="colSev">Severity</span><i class="grip" data-i18n-title="colGrip"></i></span>
       <span data-col="host"><span class="lbl" data-i18n="colHost">Host</span><i class="grip" data-i18n-title="colGrip"></i></span>
       <span data-col="app"><span class="lbl" data-i18n="colApp">App</span><i class="grip" data-i18n-title="colGrip"></i></span>
+      <span data-col="codes"><span class="lbl" data-i18n="colCodes" data-i18n-title="codesTitle">Filters</span></span>
       <span data-col="msg"><span class="lbl" data-i18n="colMsg">Message</span></span>
     </div>
     <main id="list" class="list"></main>

web/style.css

@@ -37,7 +37,8 @@
   --tag-warning: #fdba74;
   --tag-warning-text: #111827;
 
-  --log-size: 12.5px;   /* Settings > Interface > Font size */
+  --log-size: 12.5px;
+  --codes-w: 4.9rem;    /* tag codes column: room for 3 badges */   /* Settings > Interface > Font size */
   /* --log-font is set by Settings > Interface > Font (defaults to --mono) */
   --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
   --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
@@ -296,13 +297,13 @@ body.busy .progress::after {
 .list { margin: 6px 20px 0; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
 .list:empty { display: none; }
 
-/* Columns: received, message time, severity, host, app, message. Widths come from
+/* Columns: received, message time, severity, host, app, tag codes, message. Widths come from
    --col-* (set on #table when a column has been resized, see app.js), shared by
    the header and every row through subgrid so that the columns line up. */
 .table {
   display: grid;
   grid-template-columns: var(--col-rcv, max-content) var(--col-mt, max-content) var(--col-sev, 4.6rem)
-    var(--col-host, minmax(5rem, 9rem)) var(--col-app, minmax(4rem, 8rem)) minmax(0, 1fr);
+    var(--col-host, minmax(5rem, 9rem)) var(--col-app, minmax(4rem, 8rem)) var(--codes-w) minmax(0, 1fr);
   column-gap: 12px;
   margin: 6px 20px 0; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
   overflow: clip; /* rounded corners without breaking the sticky header (hidden would) */
@@ -331,7 +332,7 @@ body.col-resizing, body.col-resizing * { cursor: col-resize !important; user-sel
 
 .row {
   display: grid;
-  grid-template-columns: max-content max-content 4.6rem minmax(5rem, 9rem) minmax(4rem, 8rem) 1fr;
+  grid-template-columns: max-content max-content 4.6rem minmax(5rem, 9rem) minmax(4rem, 8rem) var(--codes-w) 1fr;
   gap: 0 12px; align-items: baseline;
   padding: 5px 14px 5px 11px;
   border-left: 3px solid transparent;
@@ -372,6 +373,15 @@ body.col-resizing, body.col-resizing * { cursor: col-resize !important; user-sel
 .row.sev-crit, .row.sev-err, .row.sev-warning { border-left-color: var(--sev); }
 .row.sev-crit, .row.sev-err { background: color-mix(in srgb, var(--sev) 7%, transparent); }
 .row .host[data-act], .row .app[data-act] { cursor: pointer; }
+/* Codes of the tags found in the message: grey badges, fixed size */
+.row .codes { white-space: nowrap; overflow: hidden; }
+.row .codes > span { display: inline-flex; gap: 3px; vertical-align: 1px; }
+.row .codes b, .tag-code {
+  min-width: 2.2ch; padding: 1px 4px; border-radius: 4px; text-align: center;
+  font-family: var(--mono); font-size: 10.5px; font-weight: 700; line-height: 1.35; font-variant-numeric: tabular-nums;
+  background: #b4bac3; color: #111827;
+}
+.row .codes b.more { background: none; box-shadow: inset 0 0 0 1px #b4bac3; color: var(--muted); }
 .row .host[data-act]:hover, .row .app[data-act]:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
 
 mark.tag {
@@ -475,6 +485,7 @@ dialog.settings .dlg > header { padding: 14px 16px 14px 22px; border-bottom: 1px
 .preview-list .row .host { grid-area: host; }
 .preview-list .row .app { grid-area: app; display: block; }
 .preview-list .row .msg { grid-area: msg; }
+.preview-list .row .codes { display: none; }
 
 dialog {
   width: min(720px, calc(100vw - 32px)); max-height: calc(100vh - 64px);
@@ -592,11 +603,12 @@ input.switch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2
 .tag-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
 .tag-row {
   display: grid; align-items: center; gap: 8px 10px;
-  grid-template-columns: 38px minmax(8rem, 1fr) 7.5rem auto 36px;
+  grid-template-columns: auto 38px minmax(8rem, 1fr) 7.5rem auto 36px;
   padding: 8px 10px; border: 1px solid var(--border); border-radius: 10px;
   background: var(--panel-2);
 }
 .tag-row.off { opacity: .55; }
+.tag-row .tag-code { font-size: 12px; padding: 3px 6px; cursor: default; }
 .tag-row input[type="color"] {
   width: 38px; height: 32px; padding: 0; border: 1px solid var(--border); border-radius: 8px;
   background: none; cursor: pointer;
@@ -639,8 +651,8 @@ input.switch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2
   .table .list { display: block; margin: 0; }
   .list-head { display: none; }
   .row, .table .row {
-    grid-template-columns: auto auto 1fr;
-    grid-template-areas: "rcv sev host" "msg msg msg";
+    grid-template-columns: auto auto 1fr auto;
+    grid-template-areas: "rcv sev host codes" "msg msg msg msg";
     gap: 3px 8px; padding: 8px 12px 8px 10px;
   }
   .row time.rcv { grid-area: rcv; }
@@ -648,6 +660,7 @@ input.switch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2
   .row .sev { grid-area: sev; }
   .row .host { grid-area: host; justify-self: end; max-width: 100%; }
   .row .app { display: none; }
+  .row .codes { grid-area: codes; }
   .row .msg { grid-area: msg; }
   .details { grid-column: 1 / -1; }
   .details dl { grid-template-columns: 1fr; }
@@ -669,10 +682,10 @@ input.switch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2
   #sizeSwitch button { flex: 1; padding: 0 4px; white-space: nowrap; font-size: 12px; }
   .field-grid select { margin-bottom: 6px; }
   .status { padding: 6px 16px; }
-  .tag-row { grid-template-columns: 38px 1fr 36px; }
+  .tag-row { grid-template-columns: auto 38px 1fr 36px; }
   .tag-row .preview { display: none; }
   .tag-row .opts { grid-column: 1 / -1; grid-row: 2; flex-wrap: wrap; }
-  .tag-row [data-del] { grid-column: 3; grid-row: 1; }
+  .tag-row [data-del] { grid-column: 4; grid-row: 1; }
 }
 
 /* ---------- Login page (AUTH_MODE=local) ---------- */