feat: Implement "Atualizar Lista" button

The "Connect WhatsApp" menu now loads instances only on clicking the "Atualizar Lista" button. The button fetches instances from the API, filters by the user's instance name, and displays the results. It also shows an appropriate message if no instances are found and addresses potential rendering errors.

src/components/whatsapp/InstanceList.tsx

@@ -26,13 +26,26 @@ const InstanceList = ({
   onRefreshInstances,
   isRefreshing
 }: InstanceListProps) => {
-  if (instances.length === 0) {
+  // Safely check if instances is an array and has elements
+  const hasInstances = Array.isArray(instances) && instances.length > 0;
+
+  if (!hasInstances) {
     return (
       <Card>
         <CardContent className="py-6">
           <div className="text-center text-muted-foreground">
             <p>Nenhuma instância criada ainda.</p>
-            <p className="mt-1">Crie uma instância usando o formulário acima.</p>
+            <p className="mt-1">Clique em 'Atualizar Lista' para buscar novamente.</p>
+            <Button 
+              variant="outline" 
+              size="sm"
+              onClick={onRefreshInstances}
+              disabled={isRefreshing}
+              className="mt-4"
+            >
+              <RefreshCw className={`h-4 w-4 mr-2 ${isRefreshing ? 'animate-spin' : ''}`} />
+              {isRefreshing ? 'Atualizando...' : 'Atualizar Lista'}
+            </Button>
           </div>
         </CardContent>
       </Card>
@@ -43,15 +56,6 @@ const InstanceList = ({
     <div className="space-y-4">
       <div className="flex justify-between items-center">
         <h2 className="text-xl font-semibold">Instâncias Criadas</h2>
-        <Button 
-          variant="outline" 
-          size="sm"
-          onClick={onRefreshInstances}
-          disabled={isRefreshing}
-        >
-          <RefreshCw className={`h-4 w-4 mr-2 ${isRefreshing ? 'animate-spin' : ''}`} />
-          {isRefreshing ? 'Atualizando...' : 'Atualizar Lista'}
-        </Button>
       </div>
       <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
         {instances.map((instance) => (

src/hooks/whatsApp/useInstanceRefresh.ts

@@ -28,9 +28,18 @@ export const useInstanceRefresh = (
       const response = await fetchAllInstances();
       console.log("Fetched instances from server:", response);
       
-      if (response.instances && Array.isArray(response.instances)) {
+      if (response && response.instances && Array.isArray(response.instances)) {
+        // Busca o nome da instância salvo para o usuário atual
+        const savedInstanceName = localStorage.getItem(`whatsapp_instance_name_${currentUserId}`);
+        console.log("Saved instance name for current user:", savedInstanceName);
+        
+        // Filtra as instâncias pelo nome criado pelo usuário
+        const filteredInstances = savedInstanceName 
+          ? response.instances.filter(instance => instance.instanceName === savedInstanceName)
+          : response.instances;
+          
         // Mapeia as instâncias do servidor para o formato correto com userId
-        const serverInstances: WhatsAppInstance[] = response.instances
+        const serverInstances: WhatsAppInstance[] = filteredInstances
           .map(serverInstance => {
             // Ensure we convert server state to valid connectionState
             let connectionState: 'open' | 'closed' | 'connecting';
@@ -53,36 +62,28 @@ export const useInstanceRefresh = (
             };
           });
         
-        console.log("Mapped server instances:", serverInstances);
+        console.log("Filtered server instances for this user:", serverInstances);
         
-        // Identifica instâncias novas que não existem localmente
-        const localInstanceIds = new Set(instances.map(i => i.instanceId));
-        const newServerInstances = serverInstances.filter(i => !localInstanceIds.has(i.instanceId));
-        
-        // Atualiza instâncias existentes com dados do servidor
-        const updatedExistingInstances = instances.map(localInstance => {
-          const serverMatch = serverInstances.find(si => si.instanceId === localInstance.instanceId);
-          if (serverMatch) {
-            return {
-              ...localInstance,
-              connectionState: serverMatch.connectionState,
-              status: serverMatch.status
-            };
-          }
-          return localInstance;
-        });
-        
-        // Combina tudo
-        const allInstances = [...updatedExistingInstances, ...newServerInstances];
-        
-        console.log("Combined instances after refresh:", allInstances);
-        setInstances(allInstances);
-        
-        toast({
-          title: "Sucesso",
-          description: `${serverInstances.length} instâncias encontradas no servidor`,
-        });
+        if (serverInstances.length > 0) {
+          setInstances(serverInstances);
+          
+          toast({
+            title: "Sucesso",
+            description: `${serverInstances.length} instância(s) encontrada(s) para este usuário`,
+          });
+        } else {
+          // Clear instances if none found for this user
+          setInstances([]);
+          
+          toast({
+            title: "Aviso",
+            description: "Nenhuma instância encontrada para este usuário",
+          });
+        }
       } else {
+        // Handle empty or invalid response
+        setInstances([]);
+        
         toast({
           title: "Aviso",
           description: "Nenhuma instância encontrada no servidor",
@@ -90,6 +91,9 @@ export const useInstanceRefresh = (
       }
     } catch (error) {
       console.error("Erro ao buscar instâncias:", error);
+      // Ensure we don't leave instances in an undefined state
+      setInstances([]);
+      
       toast({
         title: "Erro",
         description: "Falha ao buscar instâncias do servidor",

src/hooks/whatsApp/useWhatsAppInstance.ts

@@ -117,12 +117,7 @@ export const useWhatsAppInstance = (
     }
   };
 
-  // Run once when component mounts or currentUserId changes
-  useEffect(() => {
-    if (instanceName && currentUserId) {
-      fetchInstanceByName();
-    }
-  }, [currentUserId]); // Only depend on userId changes
+  // Don't automatically load the instance - removed the useEffect that called fetchInstanceByName
 
   return {
     instanceName,

src/pages/WhatsApp.tsx

@@ -10,6 +10,8 @@ import { useWhatsAppInstances } from '@/hooks/useWhatsAppInstances';
 import { useWhatsAppActions } from '@/hooks/useWhatsAppActions';
 import { useWhatsAppInstance, WHATSAPP_INSTANCE_KEY } from '@/hooks/whatsApp/useWhatsAppInstance';
 import { usePeriodicStatusCheck } from '@/hooks/whatsApp/usePeriodicStatusCheck';
+import { Button } from '@/components/ui/button';
+import { RefreshCw } from 'lucide-react';
 
 const WhatsApp = () => {
   const { 
@@ -40,11 +42,12 @@ const WhatsApp = () => {
     isLoading,
     instanceFound,
     setInstanceFound,
+    fetchInstanceByName,
     saveInstanceName,
     clearInstanceName
   } = useWhatsAppInstance(currentUserId, addInstance);
   
-  // Set up periodic status checking
+  // Set up periodic status checking only after instances are loaded
   usePeriodicStatusCheck(instances.length, checkAllInstancesStatus);
 
   // Handler para quando o usuário cria uma nova instância
@@ -87,29 +90,40 @@ const WhatsApp = () => {
     }
   };
 
-  console.log('Current instances in WhatsApp component:', instances);
-  console.log('Instance found status:', instanceFound);
+  // Check if we have any instances to show
+  const hasInstances = Array.isArray(instances) && instances.length > 0;
 
   return (
     <Layout>
       <div className="space-y-6">
         <div className="flex justify-between items-center">
           <h1 className="text-2xl font-bold tracking-tight">Conectar WhatsApp</h1>
+          
+          {/* Update List Button - Always visible */}
+          <Button 
+            variant="outline" 
+            onClick={refreshInstances}
+            disabled={isRefreshing}
+            className="flex items-center gap-2"
+          >
+            <RefreshCw className={`h-4 w-4 ${isRefreshing ? 'animate-spin' : ''}`} />
+            {isRefreshing ? 'Atualizando...' : 'Atualizar Lista'}
+          </Button>
         </div>
         
         {isLoading ? (
           <LoadingState />
-        ) : !instanceFound ? (
-          // Show create form if no instance found
+        ) : !instanceFound && !hasInstances ? (
+          // Show create form if no instance found and no instances loaded
           <CreateInstanceForm 
             onInstanceCreated={handleInstanceCreated} 
             initialInstanceName={instanceName}
           />
         ) : (
-          // Only show stats and instance list if instance found
+          // Only show stats and instance list if instances are available
           <>
             {/* Stats component */}
-            <InstanceStats instances={instances} />
+            {hasInstances && <InstanceStats instances={instances} />}
             
             {/* List of created instances */}
             <InstanceList 

src/services/whatsApp/instanceManagement.ts

@@ -69,7 +69,8 @@ export const fetchAllInstances = async (): Promise<any> => {
   try {
     console.log('Fetching all instances');
     
-    const data = await makeRequest('/fetch-instances', 'GET');
+    // Using the /instance/fetchInstances endpoint as specified in the requirements
+    const data = await makeRequest('/instance/fetchInstances', 'GET');
     
     console.log('All instances response:', data);
     return data;