add landing and subscription plans

Signed-off-by: Omar Sánchez Pizarro <omar.sanchez@pistacero.net>

web/backend/services/mongodb.js

@@ -1277,6 +1277,104 @@ export async function updateArticleFavorite(platform, id, is_favorite, username)
   }
 }
 
+// Funciones para suscripciones
+export async function getUserSubscription(username) {
+  if (!db) {
+    return null;
+  }
+  
+  try {
+    const usersCollection = db.collection('users');
+    const user = await usersCollection.findOne({ username });
+    
+    if (!user) {
+      return null;
+    }
+    
+    // Si no tiene suscripción, retornar plan gratuito por defecto
+    if (!user.subscription) {
+      return {
+        planId: 'free',
+        status: 'active',
+        currentPeriodStart: user.createdAt || new Date(),
+        currentPeriodEnd: null, // Plan gratuito no expira
+        cancelAtPeriodEnd: false,
+      };
+    }
+    
+    return user.subscription;
+  } catch (error) {
+    console.error(`Error obteniendo suscripción de ${username}:`, error.message);
+    return null;
+  }
+}
+
+export async function updateUserSubscription(username, subscriptionData) {
+  if (!db) {
+    throw new Error('MongoDB no está disponible');
+  }
+  
+  try {
+    const usersCollection = db.collection('users');
+    
+    // Verificar que el usuario existe
+    const user = await usersCollection.findOne({ username });
+    if (!user) {
+      throw new Error(`Usuario ${username} no existe`);
+    }
+    
+    // Actualizar suscripción
+    await usersCollection.updateOne(
+      { username },
+      {
+        $set: {
+          subscription: {
+            planId: subscriptionData.planId || 'free',
+            status: subscriptionData.status || 'active',
+            currentPeriodStart: subscriptionData.currentPeriodStart || new Date(),
+            currentPeriodEnd: subscriptionData.currentPeriodEnd || null,
+            cancelAtPeriodEnd: subscriptionData.cancelAtPeriodEnd || false,
+            stripeCustomerId: subscriptionData.stripeCustomerId || null,
+            stripeSubscriptionId: subscriptionData.stripeSubscriptionId || null,
+            updatedAt: new Date(),
+          },
+          updatedAt: new Date(),
+        },
+      }
+    );
+    
+    return true;
+  } catch (error) {
+    console.error(`Error actualizando suscripción de ${username}:`, error.message);
+    throw error;
+  }
+}
+
+export async function getWorkerCount(username) {
+  if (!db) {
+    return 0;
+  }
+  
+  try {
+    const workersCollection = db.collection('workers');
+    const workersData = await workersCollection.findOne({ username });
+    
+    if (!workersData || !workersData.items) {
+      return 0;
+    }
+    
+    // Contar solo workers activos (no deshabilitados)
+    const activeWorkers = (workersData.items || []).filter(
+      (item, index) => !(workersData.disabled || []).includes(index)
+    );
+    
+    return activeWorkers.length;
+  } catch (error) {
+    console.error(`Error contando workers de ${username}:`, error.message);
+    return 0;
+  }
+}
+
 // Cerrar conexión
 export async function closeMongoDB() {
   if (mongoClient) {