feat: add daily cleanup job for orphaned tasks

src/bot/bot.ts

@@ -1,5 +1,6 @@
 import { query } from '../database/db';
-import { fetchGroups, configureWebhook } from './utils/api'; // Add this import
+import { fetchGroups, configureWebhook } from './utils/api';
+import { startCleanupJob } from '../jobs/cleanupJob';
 
 export const linkedGroups: Set<string> = new Set();
 
@@ -17,6 +18,9 @@ export async function startBot() {
     linkedGroups.add(group.id);
   }
 
-  await fetchGroups(communityId); // Ensure this function is imported
-  await configureWebhook(webhookUrl); // Ensure this function is imported
+  await fetchGroups(communityId);
+  await configureWebhook(webhookUrl);
+  
+  // Start the cleanup job
+  startCleanupJob();
 }

src/jobs/cleanupJob.ts

@@ -0,0 +1,26 @@
+import { cleanupOrphanedTasks } from '../services/cleanupService';
+
+export function startCleanupJob() {
+  // Run daily at 2 AM
+  const cleanupInterval = 24 * 60 * 60 * 1000; // 24 hours
+  const initialDelay = calculateInitialDelay();
+
+  setTimeout(() => {
+    // Run immediately after delay
+    cleanupOrphanedTasks();
+    // Then set up the daily interval
+    setInterval(cleanupOrphanedTasks, cleanupInterval);
+  }, initialDelay);
+}
+
+function calculateInitialDelay(): number {
+  const now = new Date();
+  const target = new Date(now);
+  target.setHours(2, 0, 0, 0); // 2 AM
+  
+  if (now > target) {
+    target.setDate(target.getDate() + 1);
+  }
+  
+  return target.getTime() - now.getTime();
+}

src/services/cleanupService.ts

@@ -0,0 +1,32 @@
+import { query, execute } from '../database/db';
+import { Task } from '../models/task';
+
+// Find and clean up orphaned tasks
+export function cleanupOrphanedTasks() {
+  try {
+    // Find tasks assigned to non-existent users
+    const orphanedTasks = query(`
+      SELECT t.id 
+      FROM tasks t
+      LEFT JOIN users u ON t.assigned_to = u.phone_number
+      WHERE t.assigned_to != '' 
+        AND u.phone_number IS NULL
+    `);
+
+    if (orphanedTasks.length > 0) {
+      console.log(`Found ${orphanedTasks.length} orphaned tasks, cleaning up...`);
+      
+      // Unassign the tasks
+      execute(`
+        UPDATE tasks 
+        SET assigned_to = ''
+        WHERE id IN (${orphanedTasks.map(t => t.id).join(',')})
+      `);
+    }
+
+    return orphanedTasks.length;
+  } catch (error) {
+    console.error('Error during cleanup:', error);
+    return 0;
+  }
+}