Initial commit - Resource Monitor with Ubuntu installer

server/scheduler.js

@@ -0,0 +1,55 @@
+const cron = require('node-cron');
+const db = require('./database');
+const monitorService = require('./monitorService');
+const notificationService = require('./notificationService');
+
+class Scheduler {
+  constructor() {
+    this.jobs = new Map();
+  }
+
+  start() {
+    // Run checks every minute
+    cron.schedule('* * * * *', async () => {
+      await this.runChecks();
+    });
+
+    // Clean old checks every hour (keep last 7 days)
+    cron.schedule('0 * * * *', () => {
+      db.prepare(`
+        DELETE FROM checks 
+        WHERE checked_at < datetime('now', '-7 days')
+      `).run();
+    });
+
+    console.log('Scheduler started');
+  }
+
+  async runChecks() {
+    const resources = db.prepare(`
+      SELECT * FROM resources WHERE enabled = 1
+    `).all();
+
+    for (const resource of resources) {
+      try {
+        const result = await monitorService.checkResource(resource);
+        monitorService.saveCheck(result);
+
+        const incident = monitorService.handleIncident(
+          resource.id,
+          result.status === 'down'
+        );
+
+        if (incident.type !== 'none') {
+          await notificationService.sendAlert(resource, incident);
+        }
+
+        console.log(`Checked ${resource.name}: ${result.status} (${result.response_time}ms)`);
+      } catch (error) {
+        console.error(`Error checking ${resource.name}:`, error.message);
+      }
+    }
+  }
+}
+
+module.exports = new Scheduler();