2026-07-22 1.1.19 Nueva Clase ValidacionDocumentosIdentidad para documentos extranjeros

ValidacionDocumentosIdentidadVIES.vb

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+Imports System.Net.Http
+Imports System.Text.Json
+Imports System.Text.RegularExpressions
+Imports System.Threading.Tasks
+
+Public Class VatValidationResult
+    Public Property IsValid As Boolean
+    Public Property Name As String
+    Public Property Address As String
+    Public Property RawJson As String
+    Public Property ErrorMessage As String
+End Class
+
+Public Class ValidacionDocumentosIdentidad
+
+    ' -----------------------------
+    ' 1) Validación de formato VAT
+    ' -----------------------------
+    Private Shared ReadOnly Patterns As New Dictionary(Of String, String) From {
+        {"AT", "^[A-Z]U[0-9]{8}$"},
+        {"BE", "^[0-9]{10}$"},
+        {"BG", "^[0-9]{9,10}$"},
+        {"CY", "^[0-9]{8}[A-Z]$"},
+        {"CZ", "^[0-9]{8,10}$"},
+        {"DE", "^[0-9]{9}$"},
+        {"DK", "^[0-9]{8}$"},
+        {"EE", "^[0-9]{9}$"},
+        {"EL", "^[0-9]{9}$"},
+        {"ES", "^[A-Z0-9][0-9]{7}[A-Z0-9]$"},
+        {"FI", "^[0-9]{8}$"},
+        {"FR", "^[A-Z0-9]{2}[0-9]{9}$"},
+        {"HR", "^[0-9]{11}$"},
+        {"HU", "^[0-9]{8}$"},
+        {"IE", "^[0-9]{7}[A-W][A-I]?$"},
+        {"IT", "^[0-9]{11}$"},
+        {"LT", "^[0-9]{9}|[0-9]{12}$"},
+        {"LU", "^[0-9]{8}$"},
+        {"LV", "^[0-9]{11}$"},
+        {"MT", "^[0-9]{8}$"},
+        {"NL", "^[0-9]{9}B[0-9]{2}$"},
+        {"PL", "^[0-9]{10}$"},
+        {"PT", "^[0-9]{9}$"},
+        {"RO", "^[0-9]{2,10}$"},
+        {"SE", "^[0-9]{12}$"},
+        {"SI", "^[0-9]{8}$"},
+        {"SK", "^[0-9]{10}$"},
+        {"XI", "^[0-9]{9}$"} ' Irlanda del Norte
+    }
+
+    Public Shared Function IsValidVatFormat(countryCode As String,
+                                            vatNumber As String) As Boolean
+
+        countryCode = countryCode.ToUpper().Trim()
+        vatNumber = vatNumber.ToUpper().Trim()
+
+        If Not Patterns.ContainsKey(countryCode) Then
+            Return False
+        End If
+
+        Return Regex.IsMatch(vatNumber, Patterns(countryCode))
+    End Function
+
+
+    ' -----------------------------
+    ' 2) Cliente HTTP compartido
+    ' -----------------------------
+    Private Shared ReadOnly _http As New HttpClient() With {
+        .Timeout = TimeSpan.FromSeconds(10)
+    }
+
+
+    ' -----------------------------
+    ' 3) Validación VIES vía REST (ASÍNCRONA)
+    ' -----------------------------
+    Public Shared Async Function ValidateVatAsync(countryCode As String,
+                                                  vatNumber As String) As Task(Of VatValidationResult)
+
+        Dim result As New VatValidationResult()
+
+        Try
+            ' Validación de formato previa
+            If Not IsValidVatFormat(countryCode, vatNumber) Then
+                result.IsValid = False
+                result.ErrorMessage = $"Formato VAT inválido para {countryCode}"
+                Return result
+            End If
+
+            Dim url = $"https://ec.europa.eu/taxation_customs/vies/rest-api/ms/{countryCode}/vat/{vatNumber}"
+
+            Dim json As String = Await _http.GetStringAsync(url)
+            result.RawJson = json
+
+            Dim doc = JsonDocument.Parse(json)
+            Dim root = doc.RootElement
+
+            result.IsValid = root.GetProperty("isValid").GetBoolean()
+
+            If result.IsValid Then
+                result.Name = root.GetProperty("traderName").GetString()
+                result.Address = root.GetProperty("traderAddress").GetString()
+            End If
+
+        Catch ex As HttpRequestException
+            result.ErrorMessage = "Error HTTP: " & ex.Message
+
+        Catch ex As TaskCanceledException
+            result.ErrorMessage = "Timeout al consultar VIES"
+
+        Catch ex As Exception
+            result.ErrorMessage = "Error inesperado: " & ex.Message
+        End Try
+
+        Return result
+    End Function
+
+
+    ' -----------------------------
+    ' 4) Validación VIES vía REST (SINCRONA)
+    ' -----------------------------
+    Public Shared Function ValidateVat(countryCode As String,
+                                       vatNumber As String) As VatValidationResult
+
+        Return ValidateVatAsync(countryCode, vatNumber).GetAwaiter().GetResult()
+
+    End Function
+
+End Class