refactor: Modularize server stats widget collectors

src/backend/ssh/widgets/network-collector.ts

@@ -0,0 +1,79 @@
+import type { Client } from "ssh2";
+import { execCommand } from "./common-utils.js";
+import { statsLogger } from "../../utils/logger.js";
+
+export async function collectNetworkMetrics(client: Client): Promise<{
+  interfaces: Array<{
+    name: string;
+    ip: string;
+    state: string;
+    rxBytes: string | null;
+    txBytes: string | null;
+  }>;
+}> {
+  const interfaces: Array<{
+    name: string;
+    ip: string;
+    state: string;
+    rxBytes: string | null;
+    txBytes: string | null;
+  }> = [];
+
+  try {
+    const ifconfigOut = await execCommand(
+      client,
+      "ip -o addr show | awk '{print $2,$4}' | grep -v '^lo'",
+    );
+    const netStatOut = await execCommand(
+      client,
+      "ip -o link show | awk '{gsub(/:/, \"\", $2); print $2,$9}'",
+    );
+
+    const addrs = ifconfigOut.stdout
+      .split("\n")
+      .map((l) => l.trim())
+      .filter(Boolean);
+    const states = netStatOut.stdout
+      .split("\n")
+      .map((l) => l.trim())
+      .filter(Boolean);
+
+    const ifMap = new Map<string, { ip: string; state: string }>();
+    for (const line of addrs) {
+      const parts = line.split(/\s+/);
+      if (parts.length >= 2) {
+        const name = parts[0];
+        const ip = parts[1].split("/")[0];
+        if (!ifMap.has(name)) ifMap.set(name, { ip, state: "UNKNOWN" });
+      }
+    }
+    for (const line of states) {
+      const parts = line.split(/\s+/);
+      if (parts.length >= 2) {
+        const name = parts[0];
+        const state = parts[1];
+        const existing = ifMap.get(name);
+        if (existing) {
+          existing.state = state;
+        }
+      }
+    }
+
+    for (const [name, data] of ifMap.entries()) {
+      interfaces.push({
+        name,
+        ip: data.ip,
+        state: data.state,
+        rxBytes: null,
+        txBytes: null,
+      });
+    }
+  } catch (e) {
+    statsLogger.debug("Failed to collect network interface stats", {
+      operation: "network_stats_failed",
+      error: e instanceof Error ? e.message : String(e),
+    });
+  }
+
+  return { interfaces };
+}