Add live visitor monitoring

public/admin.css

@@ -61,7 +61,7 @@ label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
   height: 100vh;
   min-height: 0;
   display: grid;
-  grid-template-columns: 330px minmax(0, 1fr);
+  grid-template-columns: 330px minmax(0, 1fr) 320px;
   overflow: hidden;
 }
 .sidebar {
@@ -358,6 +358,83 @@ label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
   flex-direction: column;
   gap: 12px;
 }
+.visitor-panel {
+  min-height: 0;
+  overflow: hidden;
+  display: grid;
+  grid-template-rows: auto minmax(0, 1fr);
+  border-left: 1px solid var(--line);
+  background: var(--panel);
+}
+.visitor-panel header {
+  padding: 14px;
+  border-bottom: 1px solid var(--line);
+  display: flex;
+  justify-content: space-between;
+  gap: 10px;
+  align-items: center;
+}
+.visitor-panel h2 { margin: 0; font-size: 18px; }
+.visitor-panel header span { color: var(--muted); font-size: 12px; }
+.visitor-list {
+  min-height: 0;
+  overflow: auto;
+}
+.visitor-card {
+  padding: 12px 14px;
+  border-bottom: 1px solid var(--line);
+  background: white;
+}
+.visitor-card-head {
+  display: grid;
+  grid-template-columns: 34px minmax(0, 1fr) 10px;
+  gap: 9px;
+  align-items: center;
+  margin-bottom: 10px;
+}
+.visitor-card-head strong,
+.visitor-card-head small {
+  display: block;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.visitor-card-head small { color: var(--muted); font-size: 12px; margin-top: 2px; }
+.visitor-avatar {
+  width: 34px;
+  height: 34px;
+  display: grid;
+  place-items: center;
+  border-radius: 8px;
+  background: #eaf6f1;
+  color: var(--brand);
+  font-weight: 800;
+  font-size: 13px;
+}
+.online-dot {
+  width: 9px;
+  height: 9px;
+  border-radius: 50%;
+  background: #2f9e44;
+  box-shadow: 0 0 0 4px rgb(47 158 68 / 14%);
+}
+.visitor-card dl {
+  display: grid;
+  grid-template-columns: 68px minmax(0, 1fr);
+  gap: 5px 8px;
+  margin: 0;
+  font-size: 12px;
+}
+.visitor-card dt { color: var(--muted); }
+.visitor-card dd {
+  min-width: 0;
+  margin: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.visitor-card a { color: var(--ink); text-decoration: none; }
+.visitor-card a:hover { color: var(--brand); text-decoration: underline; }
 .message {
   max-width: min(680px, 86%);
   padding: 10px 12px;
@@ -599,4 +676,5 @@ pre {
   .app { height: auto; min-height: 100vh; grid-template-columns: 1fr; overflow: visible; }
   .sidebar { height: 42vh; border-right: 0; border-bottom: 1px solid var(--line); }
   .conversation { height: 58vh; }
+  .visitor-panel { display: none; }
 }

public/admin.html

@@ -74,6 +74,16 @@
           </form>
         </section>
 
+        <aside class="visitor-panel">
+          <header>
+            <h2>Navstevnici</h2>
+            <span id="visitorCount">0 online</span>
+          </header>
+          <div id="visitorList" class="visitor-list">
+            <p class="empty-list">Zatim nikdo online.</p>
+          </div>
+        </aside>
+
         <aside id="settingsPanel" class="settings hidden">
           <div class="settings-head">
             <h2>Nastaveni widgetu</h2>

public/admin.js

@@ -2,6 +2,7 @@ const state = {
   site: null,
   snippet: "",
   conversations: [],
+  visitors: [],
   activeId: null,
   active: null,
   events: null,
@@ -202,7 +203,7 @@ async function showApp() {
   $("#loginView").classList.add("hidden");
   $("#appView").classList.remove("hidden");
   await loadBootstrap();
-  await loadConversations();
+  await Promise.all([loadConversations(), loadVisitors()]);
   connectEvents();
 }
 
@@ -224,6 +225,12 @@ async function loadConversations() {
   renderConversations();
 }
 
+async function loadVisitors() {
+  const data = await api("/api/admin/visitors");
+  state.visitors = data.visitors;
+  renderVisitors();
+}
+
 async function openConversation(id) {
   stopAttention();
   state.activeId = id;
@@ -247,6 +254,11 @@ function connectEvents() {
       renderSite();
       return;
     }
+    if (data.type === "visitors:update") {
+      state.visitors = data.visitors;
+      renderVisitors();
+      return;
+    }
     await loadConversations();
     if (data.type === "conversation:delete" && data.conversationId === state.activeId) {
       clearActiveConversation();
@@ -305,6 +317,60 @@ function renderConversations() {
   `).join("") : `<p class="empty-list">Zadny chat pro vybrany filtr.</p>`;
 }
 
+function renderVisitors() {
+  $("#visitorCount").textContent = `${state.visitors.length} online`;
+  $("#visitorList").innerHTML = state.visitors.length ? state.visitors.map((visitor) => `
+    <article class="visitor-card">
+      <div class="visitor-card-head">
+        <span class="visitor-avatar">${escapeHtml(visitor.initials || "??")}</span>
+        <div>
+          <strong>${escapeHtml(visitor.label || "Navstevnik")}</strong>
+          <small>${escapeHtml(browserLabel(visitor.device))}</small>
+        </div>
+        <span class="online-dot" title="Online"></span>
+      </div>
+      <dl>
+        <dt>Zeme</dt>
+        <dd>${visitor.countryFlag || ""} ${escapeHtml(visitor.countryCode || "?")}</dd>
+        <dt>Stranka</dt>
+        <dd><a href="${escapeHtml(visitor.currentUrl || "#")}" target="_blank" rel="noreferrer">${escapeHtml(pageTitle(visitor))}</a></dd>
+        <dt>Prisiel z</dt>
+        <dd>${visitor.referrer ? `<a href="${escapeHtml(visitor.referrer)}" target="_blank" rel="noreferrer">${escapeHtml(referrerLabel(visitor.referrer))}</a>` : "primy vstup"}</dd>
+        <dt>Cas</dt>
+        <dd>${formatDuration(visitor.sessionSeconds)}</dd>
+        <dt>Navstevy</dt>
+        <dd>${Number(visitor.visitCount || visitor.pageCount || 1)}</dd>
+        <dt>Chaty</dt>
+        <dd>${Number(visitor.conversationCount || 0)}</dd>
+      </dl>
+    </article>
+  `).join("") : `<p class="empty-list">Zatim nikdo online.</p>`;
+}
+
+function pageTitle(visitor) {
+  const history = Array.isArray(visitor.browsingHistory) ? visitor.browsingHistory : [];
+  const current = history.find((item) => item.url === visitor.currentUrl) || history[history.length - 1];
+  return current?.title || shortUrl(visitor.currentUrl) || "neznamá stranka";
+}
+
+function referrerLabel(value) {
+  try {
+    return new URL(value).hostname.replace(/^www\./, "");
+  } catch {
+    return shortUrl(value) || value;
+  }
+}
+
+function browserLabel(device = {}) {
+  const ua = String(device.userAgent || "");
+  const browser = ua.includes("Edg/") ? "Edge"
+    : ua.includes("Chrome/") ? "Chrome"
+    : ua.includes("Firefox/") ? "Firefox"
+    : ua.includes("Safari/") ? "Safari"
+    : "Browser";
+  return [device.platform || "zarizeni", browser].filter(Boolean).join(" - ");
+}
+
 function renderActive() {
   const { conversation, messages } = state.active;
   $("#conversationHeader").innerHTML = `

public/widget.js

@@ -164,6 +164,11 @@
     });
 
     rememberPage();
+    pingVisitor();
+    setInterval(pingVisitor, 25_000);
+    document.addEventListener("visibilitychange", () => {
+      if (!document.hidden) pingVisitor();
+    });
     if (session.conversationId) {
       loadExistingConversation(messages).finally(() => connectEvents(messages, typing, panel, launcher, settings));
     }
@@ -345,6 +350,10 @@
     };
   }
 
+  function pingVisitor() {
+    postJson(`${apiBase}/api/widget/visitors/ping`, withVisitorContext({})).catch(() => {});
+  }
+
   function showFormError(root, message) {
     const note = root.querySelector(".mf-note");
     note.textContent = message;

server.js

@@ -62,6 +62,7 @@ async function route(req, res) {
   if (url.pathname.startsWith("/api/admin/")) return requireAdmin(req, res, () => adminApi(req, res, url));
 
   if (url.pathname === "/api/widget/config" && req.method === "GET") return widgetConfig(res, url);
+  if (url.pathname === "/api/widget/visitors/ping" && req.method === "POST") return visitorPing(req, res);
   if (url.pathname === "/api/widget/conversations" && req.method === "POST") return createConversation(req, res);
   if (url.pathname.match(/^\/api\/widget\/conversations\/[^/]+$/) && req.method === "GET") return getVisitorConversation(res, url);
   if (url.pathname.match(/^\/api\/widget\/conversations\/[^/]+\/messages$/) && req.method === "POST") return createVisitorMessage(req, res, url);
@@ -77,6 +78,7 @@ async function adminApi(req, res, url) {
   if (url.pathname === "/api/admin/events" && req.method === "GET") return eventStream(req, res, url, "admin");
   if (url.pathname === "/api/admin/site" && req.method === "PATCH") return updateSite(req, res);
   if (url.pathname === "/api/admin/conversations" && req.method === "GET") return adminConversations(res);
+  if (url.pathname === "/api/admin/visitors" && req.method === "GET") return adminVisitors(res);
   if (url.pathname.match(/^\/api\/admin\/attachments\/\d+$/) && req.method === "DELETE") return deleteAttachment(res, url);
   if (url.pathname.match(/^\/api\/admin\/conversations\/[^/]+$/) && req.method === "GET") return adminConversation(res, url);
   if (url.pathname.match(/^\/api\/admin\/conversations\/[^/]+$/) && req.method === "DELETE") return deleteConversation(res, url);
@@ -159,8 +161,27 @@ function initDb() {
       created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
     );
 
+    CREATE TABLE IF NOT EXISTS visitor_sessions (
+      id INTEGER PRIMARY KEY,
+      company_id INTEGER NOT NULL REFERENCES companies(id),
+      site_id INTEGER NOT NULL REFERENCES sites(id),
+      visitor_token TEXT NOT NULL,
+      current_url TEXT,
+      referrer TEXT,
+      browsing_history_json TEXT NOT NULL DEFAULT '[]',
+      device_json TEXT NOT NULL DEFAULT '{}',
+      language TEXT,
+      timezone TEXT,
+      ip TEXT,
+      country_code TEXT,
+      first_seen_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+      last_seen_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+      UNIQUE(site_id, visitor_token)
+    );
+
     CREATE INDEX IF NOT EXISTS idx_conversations_site_status ON conversations(site_id, status, last_message_at);
     CREATE INDEX IF NOT EXISTS idx_messages_conversation ON messages(conversation_id, created_at);
+    CREATE INDEX IF NOT EXISTS idx_visitor_sessions_seen ON visitor_sessions(site_id, last_seen_at);
   `);
   if (ensureColumn("conversations", "admin_seen_at", "TEXT")) {
     db.prepare("UPDATE conversations SET admin_seen_at = last_message_at WHERE admin_seen_at IS NULL").run();
@@ -292,6 +313,10 @@ function adminConversations(res) {
   return json(res, 200, { conversations: rows.map(formatConversationSummary) });
 }
 
+function adminVisitors(res) {
+  return json(res, 200, { visitors: currentVisitors() });
+}
+
 function adminConversation(res, url) {
   const conversation = findConversation(publicIdFrom(url));
   if (!conversation) return json(res, 404, { error: "conversation_not_found" });
@@ -350,6 +375,44 @@ function widgetConfig(res, url) {
   return json(res, 200, { site: formatSite(site), publicBaseUrl: PUBLIC_BASE_URL });
 }
 
+async function visitorPing(req, res) {
+  const body = await readJson(req);
+  const site = db.prepare("SELECT * FROM sites WHERE site_key = ?").get(body.siteKey || "9b-plus");
+  if (!site) return json(res, 404, { error: "site_not_found" });
+  const visitorToken = body.visitorToken || id("vis");
+  db.prepare(`
+    INSERT INTO visitor_sessions (
+      company_id, site_id, visitor_token, current_url, referrer, browsing_history_json,
+      device_json, language, timezone, ip, country_code, first_seen_at, last_seen_at
+    )
+    VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+    ON CONFLICT(site_id, visitor_token) DO UPDATE SET
+      current_url = excluded.current_url,
+      referrer = COALESCE(excluded.referrer, visitor_sessions.referrer),
+      browsing_history_json = excluded.browsing_history_json,
+      device_json = excluded.device_json,
+      language = excluded.language,
+      timezone = excluded.timezone,
+      ip = excluded.ip,
+      country_code = COALESCE(excluded.country_code, visitor_sessions.country_code),
+      last_seen_at = CURRENT_TIMESTAMP
+  `).run(
+    site.company_id,
+    site.id,
+    visitorToken,
+    nullish(body.currentUrl),
+    nullish(body.referrer),
+    JSON.stringify(body.browsingHistory || []),
+    JSON.stringify(body.device || {}),
+    nullish(body.language),
+    nullish(body.timezone),
+    clientIp(req),
+    nullish(countryFromHeaders(req))
+  );
+  publish("admin", { type: "visitors:update", visitors: currentVisitors() });
+  return json(res, 200, { ok: true });
+}
+
 function getVisitorConversation(res, url) {
   const conversation = findConversation(publicIdFrom(url));
   if (!conversation) return json(res, 404, { error: "conversation_not_found" });
@@ -559,6 +622,44 @@ function updateVisitorContext(conversationId, body) {
   );
 }
 
+function currentVisitors() {
+  const rows = db.prepare(`
+    SELECT vs.*, s.site_key,
+      (SELECT COUNT(*) FROM conversations c WHERE c.site_id = vs.site_id AND c.visitor_token = vs.visitor_token) AS visitor_conversation_count
+    FROM visitor_sessions vs
+    JOIN sites s ON s.id = vs.site_id
+    WHERE datetime(vs.last_seen_at) >= datetime('now', '-90 seconds')
+    ORDER BY datetime(vs.last_seen_at) DESC
+    LIMIT 100
+  `).all();
+  return rows.map(formatVisitorSession);
+}
+
+function formatVisitorSession(row) {
+  const history = parseJson(row.browsing_history_json, []);
+  const device = parseJson(row.device_json, {});
+  const countryCode = row.country_code || countryFromTimezone(row.timezone) || countryFromLanguage(row.language);
+  return {
+    id: row.visitor_token,
+    initials: visitorInitials(row.visitor_token),
+    label: visitorLabel(row.visitor_token),
+    online: true,
+    currentUrl: row.current_url,
+    referrer: row.referrer,
+    browsingHistory: history,
+    pageCount: new Set(history.map((item) => item.url).filter(Boolean)).size,
+    visitCount: Math.max(1, history.length),
+    conversationCount: row.visitor_conversation_count || 0,
+    device,
+    language: row.language,
+    timezone: row.timezone,
+    countryCode,
+    countryFlag: countryCode ? flagEmoji(countryCode) : "",
+    sessionSeconds: sessionSeconds(row.browsing_history_json, row.first_seen_at),
+    lastSeenAt: row.last_seen_at
+  };
+}
+
 function conversationDetails(conversation) {
   const messages = db.prepare("SELECT * FROM messages WHERE conversation_id = ? ORDER BY id ASC").all(conversation.id);
   const attachments = db.prepare("SELECT * FROM attachments WHERE conversation_id = ? ORDER BY id ASC").all(conversation.id);
@@ -812,6 +913,20 @@ function countryFromLanguage(language) {
   return match ? match[1].toUpperCase() : null;
 }
 
+function visitorInitials(visitorToken) {
+  const hash = crypto.createHash("sha1").update(String(visitorToken || "")).digest("hex").toUpperCase();
+  return hash.slice(0, 2);
+}
+
+function visitorLabel(visitorToken) {
+  return `Navstevnik ${visitorInitials(visitorToken)}`;
+}
+
+function flagEmoji(countryCode) {
+  if (!countryCode || countryCode.length !== 2) return "";
+  return countryCode.toUpperCase().replace(/./g, (char) => String.fromCodePoint(127397 + char.charCodeAt()));
+}
+
 function isAllowedImageAttachment(attachment, buffer) {
   const extension = path.extname(attachment.name || "").toLowerCase();
   const type = String(attachment.type || "").toLowerCase();