v1.1: Add CIDR subnet filtering and Agent filter in Devices page

proxy/db/capacityTracker.js

@@ -0,0 +1,59 @@
+// proxy/db/capacityTracker.js
+// ─────────────────────────────────────────────────────────────────────────────
+// MongoDB Capacity & Data Size Breakdown per Network Agent.
+// Measures logical document sizes per agent_uuid across all collections.
+// ─────────────────────────────────────────────────────────────────────────────
+
+const mongoose = require('mongoose');
+
+async function logCapacityStats(prefix = '[MongoDB]') {
+  try {
+    if (!mongoose.connection || !mongoose.connection.db) {
+      return;
+    }
+    const db = mongoose.connection.db;
+
+    const stats = await db.command({ dbStats: 1 });
+    const dataSizeMB = (stats.dataSize / (1024 * 1024)).toFixed(2);
+    const storageSizeMB = (stats.storageSize / (1024 * 1024)).toFixed(2);
+    console.log(`${prefix} Capacity Used: Data Size = ${dataSizeMB} MB, Storage Size = ${storageSizeMB} MB`);
+
+    const agentSizes = {};
+    const collections = await db.listCollections().toArray();
+    
+    for (const colInfo of collections) {
+      const colName = colInfo.name;
+      if (colName.startsWith('system.')) continue;
+      const col = db.collection(colName);
+
+      const sampleDoc = await col.findOne({ agent_uuid: { $ne: null } });
+      if (!sampleDoc) continue;
+
+      const pipeline = [
+        { $project: { agent_uuid: 1, docSize: { $bsonSize: "$$ROOT" } } },
+        { $group: { _id: "$agent_uuid", totalBytes: { $sum: "$docSize" } } }
+      ];
+      
+      const results = await col.aggregate(pipeline).toArray();
+      for (const res of results) {
+        const agent = res._id || 'Unknown';
+        agentSizes[agent] = (agentSizes[agent] || 0) + res.totalBytes;
+      }
+    }
+
+    const sortedAgents = Object.entries(agentSizes)
+      .map(([agent, bytes]) => ({ agent, sizeMB: parseFloat((bytes / (1024 * 1024)).toFixed(2)) }))
+      .sort((a, b) => b.sizeMB - a.sizeMB);
+
+    if (sortedAgents.length > 0) {
+      console.log(`${prefix} Data Size Breakdown per Agent:`);
+      for (const { agent, sizeMB } of sortedAgents) {
+        console.log(`  - ${agent}: ${sizeMB.toFixed(2)} MB`);
+      }
+    }
+  } catch (err) {
+    console.warn(`${prefix} Could not retrieve DB capacity breakdown:`, err.message);
+  }
+}
+
+module.exports = { logCapacityStats };