From 6f6b822f16f750bb13b2ea61771ee3699c0d6dfb Mon Sep 17 00:00:00 2001
From: Andrey Lutsenko <papatramp@Papas-MacBook-Air.local>
Date: Thu, 9 Apr 2026 22:11:13 +1000
Subject: [PATCH] Improve UI with scan selectors and diff host highlighting.

Add scan dropdown selectors and highlight new/missing hosts directly on topology graph from diff results.

Made-with: Cursor
---
 README.md      |  2 ++
 TECH_SPEC.md   |  1 +
 web/index.html | 67 +++++++++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 67 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 159045f..311e90d 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,8 @@ http://localhost:8080/
 - загрузить topology по `scan_id`;
 - автоматически подставить последний scan (`Последний scan`);
 - сравнить два scan прямо на странице (`from`/`to`) через `/api/scans/diff`.
+- выбрать scan из выпадающего списка последних 20;
+- подсветить на графе новые (`[+]`, зеленый) и пропавшие (`[-]`, красный) хосты по diff.
 
 По умолчанию используется `STORE_BACKEND=memory`.
 SNMP-проверка по умолчанию включена (`SNMP_ENABLED=true`, community `public`).
diff --git a/TECH_SPEC.md b/TECH_SPEC.md
index a004398..37910d6 100644
--- a/TECH_SPEC.md
+++ b/TECH_SPEC.md
@@ -52,6 +52,7 @@
 - [x] добавлены endpoints результатов: hosts, ports, snmp, lldp, links, topology;
 - [x] подготовлены конфиги для запуска как сервис на Linux и за IIS на Windows.
 - [x] UI позволяет выбрать последний scan и выполнить diff двух сканов.
+- [x] UI позволяет выбирать scan из списка и подсвечивать изменения на графе.
 
 ## Минимальные API
 
diff --git a/web/index.html b/web/index.html
index 577d823..eb1956e 100644
--- a/web/index.html
+++ b/web/index.html
@@ -7,7 +7,7 @@
     <style>
       body { font-family: Arial, sans-serif; margin: 16px; color: #1f2937; }
       .row { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; }
-      input, button { padding: 8px 10px; font-size: 14px; }
+      input, select, button { padding: 8px 10px; font-size: 14px; }
       #status { margin: 8px 0; color: #374151; }
       #canvas { border: 1px solid #d1d5db; border-radius: 8px; width: 100%; height: 620px; }
       .hint { color: #6b7280; font-size: 13px; margin-bottom: 8px; }
@@ -18,6 +18,7 @@
     <div class="hint">Можно выбрать последний scan автоматически или сравнить два скана через встроенный diff.</div>
     <div class="row">
       <input id="scanId" placeholder="scan_id" style="min-width: 380px;" />
+      <select id="scanSelect" style="min-width: 360px;"></select>
       <button id="loadBtn">Загрузить</button>
       <button id="latestBtn">Последний scan</button>
       <button id="fitBtn">По центру</button>
@@ -25,6 +26,8 @@
     <div class="row">
       <input id="fromScanId" placeholder="from scan_id" style="min-width: 280px;" />
       <input id="toScanId" placeholder="to scan_id" style="min-width: 280px;" />
+      <select id="fromScanSelect" style="min-width: 240px;"></select>
+      <select id="toScanSelect" style="min-width: 240px;"></select>
       <button id="diffBtn">Сравнить</button>
     </div>
     <div id="status">Ожидание данных...</div>
@@ -33,8 +36,11 @@
 
     <script>
       const scanIdInput = document.getElementById("scanId");
+      const scanSelect = document.getElementById("scanSelect");
       const fromScanIdInput = document.getElementById("fromScanId");
       const toScanIdInput = document.getElementById("toScanId");
+      const fromScanSelect = document.getElementById("fromScanSelect");
+      const toScanSelect = document.getElementById("toScanSelect");
       const loadBtn = document.getElementById("loadBtn");
       const latestBtn = document.getElementById("latestBtn");
       const diffBtn = document.getElementById("diffBtn");
@@ -51,7 +57,7 @@
         while (svg.firstChild) svg.removeChild(svg.firstChild);
       }
 
-      function drawTopology(data) {
+      function drawTopology(data, highlight = null) {
         clearSVG();
         const nodes = data.nodes || [];
         const edges = data.edges || [];
@@ -88,12 +94,14 @@
         nodes.forEach(n => {
           const p = pos.get(n.ip);
           if (!p) return;
+          const isNew = highlight && highlight.newHosts && highlight.newHosts.has(n.ip);
+          const isMissing = highlight && highlight.missingHosts && highlight.missingHosts.has(n.ip);
 
           const circle = document.createElementNS(NS, "circle");
           circle.setAttribute("cx", String(p.x));
           circle.setAttribute("cy", String(p.y));
           circle.setAttribute("r", "16");
-          circle.setAttribute("fill", "#2563eb");
+          circle.setAttribute("fill", isNew ? "#16a34a" : (isMissing ? "#dc2626" : "#2563eb"));
           circle.setAttribute("opacity", "0.9");
           svg.appendChild(circle);
 
@@ -103,10 +111,45 @@
           txt.setAttribute("font-size", "12");
           txt.setAttribute("fill", "#111827");
           txt.textContent = n.name ? `${n.name} (${n.ip})` : n.ip;
+          if (isNew) txt.textContent += " [+]";
+          if (isMissing) txt.textContent += " [-]";
           svg.appendChild(txt);
         });
       }
 
+      function fillSelect(selectEl, scans, placeholder) {
+        selectEl.innerHTML = "";
+        const empty = document.createElement("option");
+        empty.value = "";
+        empty.textContent = placeholder;
+        selectEl.appendChild(empty);
+        scans.forEach(s => {
+          const opt = document.createElement("option");
+          opt.value = s.id;
+          opt.textContent = `${s.id} (${s.status})`;
+          selectEl.appendChild(opt);
+        });
+      }
+
+      async function loadScanOptions() {
+        try {
+          const res = await fetch("/api/scans?limit=20");
+          if (!res.ok) return;
+          const data = await res.json();
+          const scans = data.items || [];
+          fillSelect(scanSelect, scans, "Выбрать scan");
+          fillSelect(fromScanSelect, scans, "from scan");
+          fillSelect(toScanSelect, scans, "to scan");
+          if (scans[0] && scans[0].id) {
+            scanIdInput.value = scans[0].id;
+            toScanIdInput.value = scans[0].id;
+          }
+          if (scans[1] && scans[1].id) {
+            fromScanIdInput.value = scans[1].id;
+          }
+        } catch (_) {}
+      }
+
       async function loadTopology() {
         const id = scanIdInput.value.trim();
         if (!id) {
@@ -170,6 +213,14 @@
           }
           const d = await res.json();
           setDiff(JSON.stringify(d, null, 2));
+          const topoRes = await fetch(`/api/scans/${encodeURIComponent(toId)}/topology?limit=5000`);
+          if (topoRes.ok) {
+            const topo = await topoRes.json();
+            drawTopology(topo, {
+              newHosts: new Set(d.new_hosts || []),
+              missingHosts: new Set(d.missing_hosts || []),
+            });
+          }
           setStatus(
             `Diff готов: +hosts ${d.new_hosts?.length || 0}, -hosts ${d.missing_hosts?.length || 0}, +links ${d.new_links?.length || 0}, -links ${d.missing_links?.length || 0}`
           );
@@ -179,12 +230,22 @@
       }
 
       loadBtn.addEventListener("click", loadTopology);
+      scanSelect.addEventListener("change", () => {
+        if (scanSelect.value) scanIdInput.value = scanSelect.value;
+      });
+      fromScanSelect.addEventListener("change", () => {
+        if (fromScanSelect.value) fromScanIdInput.value = fromScanSelect.value;
+      });
+      toScanSelect.addEventListener("change", () => {
+        if (toScanSelect.value) toScanIdInput.value = toScanSelect.value;
+      });
       latestBtn.addEventListener("click", loadLatestScan);
       diffBtn.addEventListener("click", loadDiff);
       fitBtn.addEventListener("click", () => {
         svg.setAttribute("viewBox", "0 0 1200 620");
       });
       setDiff("Diff будет показан здесь...");
+      loadScanOptions();
     </script>
   </body>
 </html>