feat(base.cfdi): agrega soporte para la cancelación de CFDIs

Facilita la cancelación de archivos CFDI estandarizando el llamado a través del mixin `base.cfdi`

l10n_mx_ir_attachment_facturae/models/base_cfdi_mixin.py

@@ -68,6 +68,15 @@ class BaseCfdi(models.AbstractModel):
         help='CFDI realed to the selected record.',
     )
     cfdi_state = fields.Selection(related='cfdi_id.state')
+    cfdi_relation_type = fields.Many2one(
+        'cfdi.relation.type', 'CFDI Relation type', copy=False,
+    )
+    related_cfdi_ids = fields.Many2many(
+        'ir.attachment.facturae.mx', 'cfdis_related_rel',
+        'related_cfdi_id', 'original_cfdi_id', 'Refund invoices',
+        readonly=True, copy=False,
+        help='Original CFDI to which this CFDI is referred to',
+    )
 
     @api.one
     def create_cfdi(self):
@@ -79,3 +88,10 @@ class BaseCfdi(models.AbstractModel):
             'company_id': self.company_id.id,
         })
         self.cfdi_id.action_validate()
+
+    @api.one
+    def cancel_cfdi(self):
+        """Cancels the cfdi related with current record and delete relation"""
+        if self.cfdi_id and self.cfdi_id.state in ['signed', 'done']:
+            self.cfdi_id.action_cancel()
+            self.cfdi_id = False