feat(ir.attachment.facturae.mx): soporte para la tarea cron de cancelacion

se crea la funcion undo_waiting_state(), si al verificar un cfdi en estado waiting y la cancelacion
es negada por el cliente, entonces regresa del estado waiting a done o signed

l10n_mx_ir_attachment_facturae/models/ir_attachment_facturae.py

@@ -542,17 +542,18 @@ class IrAttachmentFacturaeMx(models.Model):
 
         TODO: Cancel outgoing CFDIs
         """
-        # Ensure this method is called only for one record
         self.ensure_one()
 
-        if self.cfdi_type == "incoming" and self.state in ("signed", "done"):
+        if self.cfdi_type == "incoming" and self.state in ("signed", "done","waiting"):
             cancel_answer = self.cancel_cfdi_sat()[0]
             if cancel_answer:
                 self.cancel_cfdi()
-            else:
+            elif cancel_answer is None:
                 self.write({
                     "state": "waiting",
                 })
+            else:
+                self.undo_waiting_state()
             return cancel_answer
 
     def sign_xml(self, xml_data):
@@ -822,6 +823,20 @@ class IrAttachmentFacturaeMx(models.Model):
         # Call function which connects with PACs
         return params_pacs.cancel_cfdi(uuid=self.uuid)
 
+    @api.multi
+    def undo_waiting_state(self):
+        '''when cancel is negate, undo waiting state'''
+        self.ensure_one()
+        if self.state in ("waiting"):
+            if self.file_pdf:
+                self.write({
+                    "state": "done"
+                })
+            else:
+                self.write({
+                    "state": "signed"
+                })
+
     @api.model
     def cancel_cfdi(self):
         ''' Cancel CFDI and rewrite PDF