fix: improve task assignment with flexible user identifier handling

src/bot/commands/task.ts

@@ -22,12 +22,20 @@ export function handleTaskCommand(body: string, sender: string, groupId: string,
 
       // Extract WhatsApp mention (format: @<phone_number>)
       const assignedUserMatch = description.match(/@\d+/);
-      const assignedUser = assignedUserMatch ? assignedUserMatch[0] : null;
+      let assignedUser = null;
       
-      // Validate phone number format
-      if (assignedUser && !/^@\d{8,}$/.test(assignedUser)) {
-        sendMessage(sender, 'Formato de mención inválido. Usa @ seguido del número de teléfono');
-        return;
+      if (assignedUserMatch) {
+        try {
+          assignedUser = normalizeUserIdentifier(assignedUserMatch[0]);
+          // Check if assigned user is in the community
+          if (!linkedGroups.has(`${assignedUser.replace('@', '')}@s.whatsapp.net`)) {
+            sendMessage(sender, `El usuario ${assignedUser} no está en la comunidad`);
+            return;
+          }
+        } catch (error) {
+          sendMessage(sender, `Formato de mención inválido: ${error.message}`);
+          return;
+        }
       }
 
       const dueDateMatch = description.match(/\d{4}-\d{2}-\d{2}/);
@@ -51,7 +59,7 @@ export function handleTaskCommand(body: string, sender: string, groupId: string,
         }
       } else if (action === 'nueva') {
         try {
-          const finalAssignedUser = assignedUser || `@${sender.split('@')[0]}`;
+          const finalAssignedUser = assignedUser || normalizeUserIdentifier(sender);
           const task = createTask(sender, {
             description: cleanDescription,
             assignedTo: finalAssignedUser,

src/utils/userUtils.ts

@@ -1,4 +1,9 @@
 export function normalizeUserIdentifier(input: string): string {
+  // Handle JID format (12345678@s.whatsapp.net)
+  if (input.includes('@s.whatsapp.net')) {
+    return `@${input.split('@')[0]}`;
+  }
+
   // Remove @ prefix if present
   const cleanInput = input.startsWith('@') ? input.slice(1) : input;