refactor: Modularize server stats widget collectors

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

@@ -0,0 +1,69 @@
+import type { Client } from "ssh2";
+import { execCommand } from "./common-utils.js";
+import { statsLogger } from "../../utils/logger.js";
+
+export async function collectProcessesMetrics(client: Client): Promise<{
+  total: number | null;
+  running: number | null;
+  top: Array<{
+    pid: string;
+    user: string;
+    cpu: string;
+    mem: string;
+    command: string;
+  }>;
+}> {
+  let totalProcesses: number | null = null;
+  let runningProcesses: number | null = null;
+  const topProcesses: Array<{
+    pid: string;
+    user: string;
+    cpu: string;
+    mem: string;
+    command: string;
+  }> = [];
+
+  try {
+    const psOut = await execCommand(
+      client,
+      "ps aux --sort=-%cpu | head -n 11",
+    );
+    const psLines = psOut.stdout
+      .split("\n")
+      .map((l) => l.trim())
+      .filter(Boolean);
+    if (psLines.length > 1) {
+      for (let i = 1; i < Math.min(psLines.length, 11); i++) {
+        const parts = psLines[i].split(/\s+/);
+        if (parts.length >= 11) {
+          topProcesses.push({
+            pid: parts[1],
+            user: parts[0],
+            cpu: parts[2],
+            mem: parts[3],
+            command: parts.slice(10).join(" ").substring(0, 50),
+          });
+        }
+      }
+    }
+
+    const procCount = await execCommand(client, "ps aux | wc -l");
+    const runningCount = await execCommand(
+      client,
+      "ps aux | grep -c ' R '",
+    );
+    totalProcesses = Number(procCount.stdout.trim()) - 1;
+    runningProcesses = Number(runningCount.stdout.trim());
+  } catch (e) {
+    statsLogger.debug("Failed to collect process stats", {
+      operation: "process_stats_failed",
+      error: e instanceof Error ? e.message : String(e),
+    });
+  }
+
+  return {
+    total: totalProcesses,
+    running: runningProcesses,
+    top: topProcesses,
+  };
+}