soporte sin conexion. modal para buscar articulos

RS_system/Controllers/ContabilidadGeneralController.cs

@@ -109,6 +109,84 @@ public class ContabilidadGeneralController : Controller
         return Json(new { success = false, message = "Error al guardar los movimientos. Verifique que el mes no esté cerrado." });
     }
 
+    // ==================== Sincronización Offline ====================
+
+    [HttpPost]
+    public async Task<IActionResult> SincronizarOffline([FromBody] List<BulkSaveRequest> transacciones)
+    {
+        if (transacciones == null || !transacciones.Any())
+            return BadRequest("No hay transacciones para sincronizar.");
+
+        var resultados = new List<object>();
+        
+        foreach (var request in transacciones)
+        {
+            try
+            {
+                if (request.ReporteId <= 0)
+                {
+                    resultados.Add(new { 
+                        success = false, 
+                        reporteId = request.ReporteId,
+                        message = "ID de reporte inválido." 
+                    });
+                    continue;
+                }
+
+                var movimientos = request.Movimientos.Select(m => new MovimientoGeneral
+                {
+                    Id = m.Id,
+                    Tipo = m.Tipo,
+                    CategoriaIngresoId = m.CategoriaIngresoId,
+                    CategoriaEgresoId = m.CategoriaEgresoId,
+                    Monto = m.Monto,
+                    Fecha = DateTime.SpecifyKind(m.Fecha, DateTimeKind.Utc),
+                    Descripcion = m.Descripcion ?? "",
+                    NumeroComprobante = m.NumeroComprobante
+                }).ToList();
+
+                var success = await _contabilidadService.GuardarMovimientosBulkAsync(request.ReporteId, movimientos);
+                
+                if (success)
+                {
+                    resultados.Add(new { 
+                        success = true, 
+                        reporteId = request.ReporteId,
+                        message = "Sincronizado exitosamente" 
+                    });
+                }
+                else
+                {
+                    resultados.Add(new { 
+                        success = false, 
+                        reporteId = request.ReporteId,
+                        message = "Error al guardar. El mes puede estar cerrado." 
+                    });
+                }
+            }
+            catch (Exception ex)
+            {
+                resultados.Add(new { 
+                    success = false, 
+                    reporteId = request.ReporteId,
+                    message = $"Error: {ex.Message}" 
+                });
+            }
+        }
+
+        var exitosos = resultados.Count(r => (bool)((dynamic)r).success);
+        var fallidos = resultados.Count - exitosos;
+
+        return Json(new { 
+            success = exitosos > 0,
+            total = transacciones.Count,
+            exitosos = exitosos,
+            fallidos = fallidos,
+            resultados = resultados
+        });
+    }
+
+
     // ==================== Cerrar Mes ====================
 
     [HttpPost]

RS_system/Controllers/MovimientosInventarioController.cs

@@ -53,13 +53,44 @@ public class MovimientosInventarioController : Controller
             ViewBag.CantidadGlobal = articulo.CantidadGlobal; // For LOTE validation?
         }
 
-        ViewBag.Articulos = new SelectList((await _articuloService.GetAllAsync()).Select(x => new { x.Id, Nombre = $"{x.Codigo} - {x.Nombre}" }), "Id", "Nombre", articuloId);
+        ViewBag.Articulos =
+            new SelectList(
+                (await _articuloService.GetAllAsync()).Select(x => new { x.Id, Nombre = $"{x.Codigo} - {x.Nombre}" }),
+                "Id", "Nombre", articuloId);
         ViewBag.Ubicaciones = new SelectList(await _ubicacionService.GetAllAsync(), "Id", "Nombre");
         ViewBag.Estados = new SelectList(await _estadoService.GetAllAsync(), "Id", "Nombre"); 
         
         return View();
     }
 
+    [HttpGet]
+    public async Task<IActionResult> BuscarArticulos(string term)
+    {
+        var articulos = await _articuloService.GetAllAsync();
+        
+        if (!string.IsNullOrWhiteSpace(term))
+        {
+            term = term.ToLower();
+            articulos = articulos
+                .Where(a => 
+                    (a.Nombre != null && a.Nombre.ToLower().Contains(term)) || 
+                    (a.Codigo != null && a.Codigo.ToLower().Contains(term)) ||
+                    (a.Descripcion != null && a.Descripcion.ToLower().Contains(term)))
+                .ToList();
+        }
+
+        // Limit results
+        var resultados = articulos.Take(20).Select(a => new {
+            a.Id,
+            a.Codigo,
+            a.Nombre,
+            Ubicacion = a.UbicacionNombre ?? "Sin ubicación",
+            Stock = a.CantidadGlobal
+        });
+
+        return Json(resultados);
+    }
+
     // POST: MovimientosInventario/RegistrarTraslado
     [HttpPost]
     [ValidateAntiForgeryToken]

RS_system/Models/ContabilidadRegistro.cs

@@ -5,8 +5,8 @@ namespace Rs_system.Models;
 
 public enum TipoMovimientoContable
 {
-    Ingreso,
+    Ingreso = 1,
-    Egreso
+    Egreso = 2
 }
 
 [Table("contabilidad_registros")]

RS_system/Services/ArticuloService.cs

@@ -67,7 +67,8 @@ public class ArticuloService : IArticuloService
                 EstadoColor = a.Estado.Color,
                 UbicacionId = a.UbicacionId,
                 UbicacionNombre = a.Ubicacion.Nombre,
-                Activo = a.Activo
+                Activo = a.Activo,
+                CantidadGlobal = a.CantidadGlobal
             })
             .ToListAsync();
     }

RS_system/Views/Contabilidad/RegistroMensual.cshtml

@@ -99,8 +99,8 @@
                                 <td><input type="date" class="form-control form-control-sm row-fecha" value="@item.Fecha.ToString("yyyy-MM-dd")" @(Model.Cerrado ? "disabled" : "") /></td>
                                 <td>
                                     <select class="form-select form-select-sm row-tipo" @(Model.Cerrado ? "disabled" : "") onchange="updateTotals()">
-                                        <!option value="1" @(item.Tipo == TipoMovimientoContable.Ingreso ? "selected" : "")>Ingreso (+)</!option>
+                                        <option value="1" selected="@(item.Tipo == TipoMovimientoContable.Ingreso)">Ingreso (+)</option>
-                                        <!option value="0" @(item.Tipo == TipoMovimientoContable.Egreso ? "selected" : "")>Egreso (-)</!option>
+                                        <option value="2" selected="@(item.Tipo == TipoMovimientoContable.Egreso)">Egreso (-)</option>
                                     </select>
                                 </td>
                                 <td><input type="text" class="form-control form-control-sm row-descripcion" value="@item.Descripcion" placeholder="Motivo del movimiento..." @(Model.Cerrado ? "disabled" : "") /></td>
@@ -151,7 +151,7 @@
                 <td>
                     <select class="form-select form-select-sm row-tipo" onchange="updateTotals()">
                         <option value="1">Ingreso (+)</option>
-                        <option value="0">Egreso (-)</option>
+                        <option value="2">Egreso (-)</option>
                     </select>
                 </td>
                 <td><input type="text" class="form-control form-control-sm row-descripcion" value="" placeholder="Motivo del movimiento..." /></td>

RS_system/Views/ContabilidadGeneral/RegistroMensual.cshtml

@@ -12,6 +12,10 @@
             <h5 class="text-secondary">
                 Saldo Actual: <span class="font-weight-bold @(ViewBag.SaldoActual >= 0 ? "text-success" : "text-danger")">@ViewBag.SaldoActual?.ToString("C")</span>
             </h5>
+            <div class="mt-2">
+                <span id="connectionStatus" class="badge bg-secondary"><i class="fas fa-wifi"></i> Verificando...</span>
+                <span id="pendingCount" class="badge bg-warning ml-2" style="display:none;">0 pendientes</span>
+            </div>
         </div>
         <div>
             <a asp-action="Index" class="btn btn-secondary btn-sm">
@@ -139,6 +143,8 @@
 </div>
 
 @section Scripts {
+    <script src="~/js/offline-db.js"></script>
+    <script src="~/js/offline-manager.js"></script>
     <script>
         const esCerrado = @Model.Cerrado.ToString().ToLower();
         const reporteId = @Model.Id;
@@ -329,26 +335,23 @@
             }));
 
             try {
-                const response = await fetch('@Url.Action("GuardarBulk")', {
+                // Use offline manager for save operation
-                    method: 'POST',
+                const result = await OfflineManager.saveTransaction(
-                    headers: {
+                    reporteId,
-                        'Content-Type': 'application/json'
+                    payloadMovimientos,
-                    },
+                    '@Url.Action("GuardarBulk")'
-                    body: JSON.stringify({
+                );
-                        ReporteId: reporteId,
-                        Movimientos: payloadMovimientos 
-                    })
-                });
-                // ... rest of logic
                 
-
-                const result = await response.json();
                 if (result.success) {
-                    // Show toast or alert
+                    if (result.offline) {
-                    alert('Guardado exitosamente');
+                        alert(result.message);
-                    location.reload(); 
+                        await OfflineManager.updatePendingCount();
+                    } else {
+                        alert('Guardado exitosamente');
+                        location.reload();
+                    }
                 } else {
-                    alert('Error: ' + result.message);
+                    alert('Error: ' + (result.message || 'Error desconocido'));
                 }
             } catch (error) {
                 console.error(error);

RS_system/Views/MovimientosInventario/Create.cshtml

@@ -23,14 +23,107 @@
             <div class="card-body">
                 <form method="get" asp-action="Create">
                     <div class="mb-3">
-                        <label class="form-label">Buscar Artículo</label>
+                        <div class="input-group">
-                        <select name="articuloId" class="form-select" asp-items="ViewBag.Articulos" onchange="this.form.submit()">
+                            <input type="text" class="form-control" value="@ViewBag.ArticuloNombre" placeholder="Ningún artículo seleccionado" readonly />
-                            <option value="">-- Seleccione un artículo --</option>
+                            <input type="hidden" name="articuloId" id="articuloIdInput" value="@ViewBag.ArticuloId" />
-                        </select>
+                            <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#modalBuscarArticulo">
-                        <div class="form-text">Seleccione para cargar datos actuales.</div>
+                                <i class="bi bi-search"></i> Buscar
+                            </button>
+                        </div>
+                        <div class="form-text">Busque y seleccione el artículo para cargar sus datos.</div>
                     </div>
                 </form>
 
+                <!-- Modal Buscador -->
+                <div class="modal fade" id="modalBuscarArticulo" tabindex="-1" aria-hidden="true">
+                    <div class="modal-dialog modal-lg">
+                        <div class="modal-content">
+                            <div class="modal-header">
+                                <h5 class="modal-title">Buscar Artículo</h5>
+                                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+                            </div>
+                            <div class="modal-body">
+                                <div class="input-group mb-3">
+                                    <input type="text" id="inputBusqueda" class="form-control" placeholder="Nombre, código o descripción...">
+                                    <button class="btn btn-outline-secondary" type="button" onclick="buscarArticulos()">
+                                        <i class="bi bi-search"></i>
+                                    </button>
+                                </div>
+                                <div class="table-responsive" style="max-height: 300px; overflow-y: auto;">
+                                    <table class="table table-hover table-sm">
+                                        <thead>
+                                            <tr>
+                                                <th>Código</th>
+                                                <th>Nombre</th>
+                                                <th>Ubicación</th>
+                                                <th>Stock</th>
+                                                <th>Acción</th>
+                                            </tr>
+                                        </thead>
+                                        <tbody id="resultadoBusqueda">
+                                            <tr><td colspan="5" class="text-center text-muted">Ingrese un término para buscar...</td></tr>
+                                        </tbody>
+                                    </table>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+
+                <script>
+                    document.getElementById('inputBusqueda').addEventListener('keypress', function (e) {
+                        if (e.key === 'Enter') {
+                            buscarArticulos();
+                        }
+                    });
+
+                    async function buscarArticulos() {
+                        const term = document.getElementById('inputBusqueda').value;
+                        if (!term || term.length < 2) {
+                            alert("Ingrese al menos 2 caracteres.");
+                            return;
+                        }
+
+                        const tbody = document.getElementById('resultadoBusqueda');
+                        tbody.innerHTML = '<tr><td colspan="5" class="text-center"><div class="spinner-border spinner-border-sm text-primary"></div> Buscando...</td></tr>';
+
+                        try {
+                            const response = await fetch(`@Url.Action("BuscarArticulos")?term=${encodeURIComponent(term)}`);
+                            const data = await response.json();
+
+                            tbody.innerHTML = '';
+                            if (data.length === 0) {
+                                tbody.innerHTML = '<tr><td colspan="5" class="text-center text-muted">No se encontraron resultados.</td></tr>';
+                                return;
+                            }
+
+                            data.forEach(item => {
+                                const tr = document.createElement('tr');
+                                tr.innerHTML = `
+                                    <td><small>${item.codigo || '-'}</small></td>
+                                    <td>${item.nombre}</td>
+                                    <td><small>${item.ubicacion}</small></td>
+                                    <td><span class="badge bg-secondary">${item.stock}</span></td>
+                                    <td>
+                                        <button type="button" class="btn btn-sm btn-primary" onclick="seleccionarArticulo(${item.id})">
+                                            Seleccionar
+                                        </button>
+                                    </td>
+                                `;
+                                tbody.appendChild(tr);
+                            });
+                        } catch (error) {
+                            console.error(error);
+                            tbody.innerHTML = '<tr><td colspan="5" class="text-center text-danger">Error al buscar.</td></tr>';
+                        }
+                    }
+
+                    function seleccionarArticulo(id) {
+                        // Redirect to same page with id parameter to load details
+                        window.location.href = '@Url.Action("Create")?articuloId=' + id;
+                    }
+                </script>
+
                 @if (ViewBag.ArticuloId != null)
                 {
                     <div class="alert alert-light border mt-3">

RS_system/obj/Debug/net9.0/RS_system.AssemblyInfo.cs

@@ -15,7 +15,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("RS_system")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+0a4c756479ff6d53fcf26ddccd18fdd64a07c2f6")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+1784131456f11aa7351eef9061c1354519f67545")]
 [assembly: System.Reflection.AssemblyProductAttribute("RS_system")]
 [assembly: System.Reflection.AssemblyTitleAttribute("RS_system")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]

RS_system/obj/Debug/net9.0/RS_system.AssemblyInfoInputs.cache

@@ -1 +1 @@
-a52affd2506f3cdbc9cb36fe76b525426724cc22cc4e60ef2470282155247555
+0c9f7ccc95584dd75dafc3cf1c7a4bb9a06235cda706237be23d01c5759bf731

RS_system/wwwroot/js/offline-db.js

@@ -0,0 +1,123 @@
+/**
+ * IndexedDB Wrapper for Offline Contabilidad
+ * Stores pending transactions when offline
+ */
+
+const OfflineDB = {
+    dbName: 'ContabilidadOfflineDB',
+    version: 1,
+    storeName: 'pendingTransactions',
+    
+    /**
+     * Initialize the database
+     */
+    async init() {
+        return new Promise((resolve, reject) => {
+            const request = indexedDB.open(this.dbName, this.version);
+            
+            request.onerror = () => reject(request.error);
+            request.onsuccess = () => resolve(request.result);
+            
+            request.onupgradeneeded = (event) => {
+                const db = event.target.result;
+                
+                // Create object store if it doesn't exist
+                if (!db.objectStoreNames.contains(this.storeName)) {
+                    const objectStore = db.createObjectStore(this.storeName, { 
+                        keyPath: 'id', 
+                        autoIncrement: true 
+                    });
+                    objectStore.createIndex('timestamp', 'timestamp', { unique: false });
+                    objectStore.createIndex('reporteId', 'reporteId', { unique: false });
+                }
+            };
+        });
+    },
+    
+    /**
+     * Add a pending transaction to the queue
+     */
+    async addPending(reporteId, movimientos) {
+        const db = await this.init();
+        
+        return new Promise((resolve, reject) => {
+            const transaction = db.transaction([this.storeName], 'readwrite');
+            const store = transaction.objectStore(this.storeName);
+            
+            const record = {
+                reporteId: reporteId,
+                movimientos: movimientos,
+                timestamp: new Date().toISOString()
+            };
+            
+            const request = store.add(record);
+            
+            request.onsuccess = () => resolve(request.result);
+            request.onerror = () => reject(request.error);
+        });
+    },
+    
+    /**
+     * Get all pending transactions
+     */
+    async getAllPending() {
+        const db = await this.init();
+        
+        return new Promise((resolve, reject) => {
+            const transaction = db.transaction([this.storeName], 'readonly');
+            const store = transaction.objectStore(this.storeName);
+            const request = store.getAll();
+            
+            request.onsuccess = () => resolve(request.result);
+            request.onerror = () => reject(request.error);
+        });
+    },
+    
+    /**
+     * Remove a specific pending transaction by id
+     */
+    async removePending(id) {
+        const db = await this.init();
+        
+        return new Promise((resolve, reject) => {
+            const transaction = db.transaction([this.storeName], 'readwrite');
+            const store = transaction.objectStore(this.storeName);
+            const request = store.delete(id);
+            
+            request.onsuccess = () => resolve();
+            request.onerror = () => reject(request.error);
+        });
+    },
+    
+    /**
+     * Clear all pending transactions
+     */
+    async clearPending() {
+        const db = await this.init();
+        
+        return new Promise((resolve, reject) => {
+            const transaction = db.transaction([this.storeName], 'readwrite');
+            const store = transaction.objectStore(this.storeName);
+            const request = store.clear();
+            
+            request.onsuccess = () => resolve();
+            request.onerror = () => reject(request.error);
+        });
+    },
+    
+    /**
+     * Get count of pending transactions
+     */
+    async getPendingCount() {
+        const db = await this.init();
+        
+        return new Promise((resolve, reject) => {
+            const transaction = db.transaction([this.storeName], 'readonly');
+            const store = transaction.objectStore(this.storeName);
+            const request = store.count();
+            
+            request.onsuccess = () => resolve(request.result);
+            request.onerror = () => reject(request.error);
+        });
+    }
+};

RS_system/wwwroot/js/offline-manager.js

@@ -0,0 +1,229 @@
+/**
+ * Offline Manager for Contabilidad
+ * Handles connection monitoring, offline queue, and synchronization
+ */
+
+const OfflineManager = {
+    isOnline: navigator.onLine,
+    isSyncing: false,
+    statusBadge: null,
+    pendingCounter: null,
+    syncInProgress: false,
+    
+    /**
+     * Initialize the offline manager
+     */
+    init() {
+        this.statusBadge = document.getElementById('connectionStatus');
+        this.pendingCounter = document.getElementById('pendingCount');
+        
+        // Listen for online/offline events
+        window.addEventListener('online', () => this.handleOnline());
+        window.addEventListener('offline', () => this.handleOffline());
+        
+        // Initial status
+        this.updateStatus();
+        this.updatePendingCount();
+        
+        // Check for pending transactions on load
+        if (this.isOnline) {
+            this.syncPending();
+        }
+    },
+    
+    /**
+     * Handle online event
+     */
+    async handleOnline() {
+        this.isOnline = true;
+        this.updateStatus();
+        console.log('Connection restored - starting sync...');
+        await this.syncPending();
+    },
+    
+    /**
+     * Handle offline event
+     */
+    handleOffline() {
+        this.isOnline = false;
+        this.updateStatus();
+        console.log('Connection lost - offline mode enabled');
+    },
+    
+    /**
+     * Update connection status badge
+     */
+    updateStatus() {
+        if (!this.statusBadge) return;
+        
+        if (this.isSyncing) {
+            this.statusBadge.className = 'badge bg-warning';
+            this.statusBadge.innerHTML = '<i class="fas fa-sync fa-spin"></i> Sincronizando';
+        } else if (this.isOnline) {
+            this.statusBadge.className = 'badge bg-success';
+            this.statusBadge.innerHTML = '<i class="fas fa-wifi"></i> En línea';
+        } else {
+            this.statusBadge.className = 'badge bg-secondary';
+            this.statusBadge.innerHTML = '<i class="fas fa-wifi-slash"></i> Sin conexión';
+        }
+    },
+    
+    /**
+     * Update pending transaction counter
+     */
+    async updatePendingCount() {
+        if (!this.pendingCounter) return;
+        
+        try {
+            const count = await OfflineDB.getPendingCount();
+            if (count > 0) {
+                this.pendingCounter.textContent = `${count} pendiente${count > 1 ? 's' : ''}`;
+                this.pendingCounter.style.display = 'inline-block';
+            } else {
+                this.pendingCounter.style.display = 'none';
+            }
+        } catch (error) {
+            console.error('Error updating pending count:', error);
+        }
+    },
+    
+    /**
+     * Save transaction (online or offline)
+     */
+    async saveTransaction(reporteId, movimientos, url) {
+        if (this.isOnline) {
+            // Try to save directly
+            try {
+                const response = await fetch(url, {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({
+                        ReporteId: reporteId,
+                        Movimientos: movimientos
+                    })
+                });
+                
+                const result = await response.json();
+                
+                if (result.success) {
+                    return { success: true, message: 'Guardado exitosamente', data: result };
+                } else {
+                    throw new Error(result.message || 'Error desconocido');
+                }
+            } catch (error) {
+                // If online but request failed, save to queue
+                console.warn('Request failed, saving to offline queue:', error);
+                await this.saveOffline(reporteId, movimientos);
+                return { 
+                    success: true, 
+                    offline: true, 
+                    message: 'Guardado en cola offline. Se sincronizará automáticamente.' 
+                };
+            }
+        } else {
+            // Save to offline queue
+            await this.saveOffline(reporteId, movimientos);
+            return { 
+                success: true, 
+                offline: true, 
+                message: 'Sin conexión. Guardado en cola offline.' 
+            };
+        }
+    },
+    
+    /**
+     * Save to offline queue
+     */
+    async saveOffline(reporteId, movimientos) {
+        await OfflineDB.addPending(reporteId, movimientos);
+        await this.updatePendingCount();
+        console.log('Transaction saved to offline queue');
+    },
+    
+    /**
+     * Synchronize pending transactions
+     */
+    async syncPending() {
+        if (!this.isOnline || this.syncInProgress) return;
+        
+        try {
+            this.syncInProgress = true;
+            this.isSyncing = true;
+            this.updateStatus();
+            
+            const pending = await OfflineDB.getAllPending();
+            
+            if (pending.length === 0) {
+                console.log('No pending transactions to sync');
+                return;
+            }
+            
+            console.log(`Syncing ${pending.length} pending transaction(s)...`);
+            
+            let successCount = 0;
+            let failCount = 0;
+            
+            for (const transaction of pending) {
+                try {
+                    const response = await fetch('/ContabilidadGeneral/GuardarBulk', {
+                        method: 'POST',
+                        headers: { 'Content-Type': 'application/json' },
+                        body: JSON.stringify({
+                            ReporteId: transaction.reporteId,
+                            Movimientos: transaction.movimientos
+                        })
+                    });
+                    
+                    const result = await response.json();
+                    
+                    if (result.success) {
+                        await OfflineDB.removePending(transaction.id);
+                        successCount++;
+                        console.log(`Transaction ${transaction.id} synced successfully`);
+                    } else {
+                        failCount++;
+                        console.error(`Transaction ${transaction.id} failed:`, result.message);
+                    }
+                } catch (error) {
+                    failCount++;
+                    console.error(`Error syncing transaction ${transaction.id}:`, error);
+                }
+            }
+            
+            await this.updatePendingCount();
+            
+            if (successCount > 0) {
+                alert(`Sincronización completa: ${successCount} registro(s) guardado(s).${failCount > 0 ? ` ${failCount} fallido(s).` : ''}`);
+                location.reload(); // Refresh to show updated data
+            } else if (failCount > 0) {
+                alert(`Error en sincronización: ${failCount} registro(s) no se pudieron guardar.`);
+            }
+            
+        } catch (error) {
+            console.error('Sync error:', error);
+        } finally {
+            this.syncInProgress = false;
+            this.isSyncing = false;
+            this.updateStatus();
+        }
+    },
+    
+    /**
+     * Manually trigger sync
+     */
+    async manualSync() {
+        if (!this.isOnline) {
+            alert('No hay conexión a internet. La sincronización se realizará automáticamente cuando se restaure la conexión.');
+            return;
+        }
+        
+        await this.syncPending();
+    }
+};
+
+// Initialize when DOM is ready
+if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', () => OfflineManager.init());
+} else {
+    OfflineManager.init();
+}