Feat: Fetch WhatsApp instance on mount

Adds functionality to fetch a WhatsApp instance from the Evolution API when the "Conectar WhatsApp" menu is accessed. The request uses the instance name entered in the form, includes the necessary headers, and displays the instance information. It also handles cases where the user is not logged in and when the instance is not found.

src/components/whatsapp/CreateInstanceForm.tsx

@@ -1,5 +1,5 @@
 
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { Input } from '@/components/ui/input';
 import { Button } from '@/components/ui/button';
@@ -11,17 +11,35 @@ import { WhatsAppInstance } from '@/types/whatsAppTypes';
 
 interface CreateInstanceFormProps {
   onInstanceCreated: (instance: WhatsAppInstance) => void;
+  initialInstanceName?: string;
+  onInstanceNameChange?: (name: string) => void;
 }
 
-const CreateInstanceForm = ({ onInstanceCreated }: CreateInstanceFormProps) => {
+const CreateInstanceForm = ({ 
+  onInstanceCreated, 
+  initialInstanceName = '', 
+  onInstanceNameChange 
+}: CreateInstanceFormProps) => {
   const { toast } = useToast();
   const [loading, setLoading] = useState(false);
-  const [instanceName, setInstanceName] = useState(() => {
-    // Get user's name from localStorage as default value
-    return localStorage.getItem('userName') || '';
-  });
+  const [instanceName, setInstanceName] = useState(initialInstanceName || '');
   const [phoneNumber, setPhoneNumber] = useState('');
   const currentUserId = localStorage.getItem('userId') || '';
+  
+  // Update instance name if initial value changes
+  useEffect(() => {
+    if (initialInstanceName) {
+      setInstanceName(initialInstanceName);
+    }
+  }, [initialInstanceName]);
+
+  const handleInstanceNameChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const newName = e.target.value;
+    setInstanceName(newName);
+    if (onInstanceNameChange) {
+      onInstanceNameChange(newName);
+    }
+  };
 
   const handleCreateInstance = async () => {
     // Validate form fields
@@ -115,7 +133,7 @@ const CreateInstanceForm = ({ onInstanceCreated }: CreateInstanceFormProps) => {
           <Input
             id="instanceName"
             value={instanceName}
-            onChange={(e) => setInstanceName(e.target.value)}
+            onChange={handleInstanceNameChange}
             placeholder="Digite um nome para a instância"
             required
           />

src/pages/WhatsApp.tsx

@@ -1,5 +1,5 @@
 
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import Layout from '@/components/layout/Layout';
 import { WhatsAppInstance } from '@/types/whatsAppTypes';
 import CreateInstanceForm from '@/components/whatsapp/CreateInstanceForm';
@@ -9,6 +9,7 @@ import QrCodeDialog from '@/components/whatsapp/QrCodeDialog';
 import { useWhatsAppInstances } from '@/hooks/useWhatsAppInstances';
 import { useWhatsAppActions } from '@/hooks/useWhatsAppActions';
 import { useToast } from '@/hooks/use-toast';
+import { fetchSpecificInstance } from '@/services/whatsApp/instanceManagement';
 
 const WhatsApp = () => {
   const { toast } = useToast();
@@ -32,6 +33,64 @@ const WhatsApp = () => {
     handleDeleteInstance,
     handleViewQrCode
   } = useWhatsAppActions(updateInstance, removeInstance, checkAllInstancesStatus);
+  
+  const [instanceName, setInstanceName] = useState(() => {
+    // Get user's name from localStorage as default instance name
+    return localStorage.getItem('userName') || '';
+  });
+  const [isLoading, setIsLoading] = useState(false);
+  const [instanceFound, setInstanceFound] = useState(false);
+  const currentUserId = localStorage.getItem('userId') || '';
+
+  // Function to fetch specific instance by name
+  const fetchInstanceByName = async () => {
+    // Skip if user not logged in or no instance name
+    if (!currentUserId || !instanceName.trim()) {
+      return;
+    }
+
+    setIsLoading(true);
+    
+    try {
+      console.log(`Fetching specific instance: ${instanceName}`);
+      const data = await fetchSpecificInstance(instanceName);
+      console.log('Fetch specific instance response:', data);
+      
+      if (data && data.instance) {
+        // Instance found, create or update instance object
+        const foundInstance: WhatsAppInstance = {
+          instanceName,
+          instanceId: instanceName,
+          phoneNumber: data.instance.number || '',
+          userId: currentUserId,
+          status: data.instance.status || 'unknown',
+          connectionState: data.instance.state || 'closed',
+          qrcode: data.qrcode?.base64 || null
+        };
+        
+        console.log('Found instance:', foundInstance);
+        addInstance(foundInstance);
+        setInstanceFound(true);
+        toast({
+          title: "Instância encontrada",
+          description: `A instância ${instanceName} foi localizada no servidor.`
+        });
+      } else {
+        setInstanceFound(false);
+        console.log(`Instance ${instanceName} not found`);
+      }
+    } catch (error) {
+      console.error('Error fetching specific instance:', error);
+      setInstanceFound(false);
+      toast({
+        title: "Instância não encontrada",
+        description: "Não foi possível encontrar a instância com este nome.",
+        variant: "destructive"
+      });
+    } finally {
+      setIsLoading(false);
+    }
+  };
 
   // Set up periodic status checks
   useEffect(() => {
@@ -63,28 +122,29 @@ const WhatsApp = () => {
     };
   }, [instances.length, checkAllInstancesStatus]);
 
-  // Run refresh instances on initial load to get server instances
+  // Fetch the specific instance when the component mounts
   useEffect(() => {
-    // Only run on first render
-    const initialLoad = async () => {
-      if (instances.length === 0) {
-        try {
-          await refreshInstances();
-        } catch (error) {
-          console.error("Error on initial instance refresh:", error);
-        }
-      }
-    };
-    
-    initialLoad();
-    // This effect should only run once when the component mounts
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
+    if (currentUserId) {
+      fetchInstanceByName();
+    } else {
+      toast({
+        title: "Login necessário",
+        description: "Você precisa estar logado para ver suas instâncias do WhatsApp.",
+        variant: "destructive"
+      });
+    }
+  }, [currentUserId, instanceName]);
+
+  // Handler for when the user changes the instance name
+  const handleInstanceNameChange = (name: string) => {
+    setInstanceName(name);
+  };
 
   // Handler for when a new instance is created
   const handleInstanceCreated = async (newInstance: WhatsAppInstance) => {
     console.log('New instance to be added:', newInstance);
     addInstance(newInstance);
+    setInstanceFound(true);
     
     // If there's a QR code in the response, show it
     if (newInstance.qrcode) {
@@ -123,6 +183,7 @@ const WhatsApp = () => {
   };
 
   console.log('Current instances in WhatsApp component:', instances);
+  console.log('Instance found status:', instanceFound);
 
   return (
     <Layout>
@@ -131,23 +192,37 @@ const WhatsApp = () => {
           <h1 className="text-2xl font-bold tracking-tight">Conectar WhatsApp</h1>
         </div>
         
-        {/* Form to create a new instance */}
-        <CreateInstanceForm onInstanceCreated={handleInstanceCreated} />
-        
-        {/* Stats component */}
-        <InstanceStats instances={instances} />
-        
-        {/* List of created instances */}
-        <InstanceList 
-          instances={instances} 
-          onViewQrCode={handleViewQrCode} 
-          onDelete={handleDeleteInstanceWrapper}
-          onRestart={handleRestartInstance}
-          onLogout={handleLogoutInstance}
-          onSetPresence={handleSetPresence}
-          onRefreshInstances={refreshInstances}
-          isRefreshing={isRefreshing}
-        />
+        {isLoading ? (
+          <div className="flex justify-center items-center p-10">
+            <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-primary"></div>
+            <p className="ml-3">Buscando instância...</p>
+          </div>
+        ) : !instanceFound ? (
+          // Show create form if no instance found
+          <CreateInstanceForm 
+            onInstanceCreated={handleInstanceCreated} 
+            initialInstanceName={instanceName}
+            onInstanceNameChange={handleInstanceNameChange}
+          />
+        ) : (
+          // Only show stats and instance list if instance found
+          <>
+            {/* Stats component */}
+            <InstanceStats instances={instances} />
+            
+            {/* List of created instances */}
+            <InstanceList 
+              instances={instances} 
+              onViewQrCode={handleViewQrCode} 
+              onDelete={handleDeleteInstanceWrapper}
+              onRestart={handleRestartInstance}
+              onLogout={handleLogoutInstance}
+              onSetPresence={handleSetPresence}
+              onRefreshInstances={refreshInstances}
+              isRefreshing={isRefreshing}
+            />
+          </>
+        )}
         
         {/* QR Code Dialog */}
         <QrCodeDialog 

src/services/whatsApp/instanceManagement.ts

@@ -78,3 +78,24 @@ export const fetchAllInstances = async (): Promise<any> => {
     throw error;
   }
 };
+
+/**
+ * Fetches a specific WhatsApp instance by name
+ */
+export const fetchSpecificInstance = async (instanceName: string): Promise<any> => {
+  try {
+    console.log(`Fetching specific instance: ${instanceName}`);
+    
+    if (!instanceName) {
+      throw new Error("Instance name cannot be empty");
+    }
+    
+    const data = await makeRequest(`/instance/fetchInstances/${encodeURIComponent(instanceName)}`, 'GET');
+    
+    console.log(`Specific instance response for ${instanceName}:`, data);
+    return data;
+  } catch (error) {
+    console.error(`Error fetching specific instance ${instanceName}:`, error);
+    throw error;
+  }
+};