whatsapp_web_groups/custom_sat_connection/models/ir_attachment.py

from odoo import api, fields, models
from os.path import basename
from zipfile import ZipFile
from tempfile import TemporaryDirectory
import base64
import os.path

class IrAttachment(models.Model):
    _inherit = "ir.attachment"

    def download_massive_zip(self):
        self = self.with_user(1)
        zip_name = "Descarga masiva.zip"
        zip_file = self.env['ir.attachment'].sudo().search([('name', '=', zip_name)], limit=1)
        if zip_file:
            zip_file.sudo().unlink()

        # Funcion para decodificar el archivo
        def isBase64_decodestring(s):
            try:
                decode_archive = base64.decodebytes(s)
                return decode_archive
            except Exception as e:
                raise ValidationError('Error:', + str(e))

        tempdir_file = TemporaryDirectory()
        location_tempdir = tempdir_file.name
        # Creando ruta dinamica para poder guardar el archivo zip
        date_act = fields.Date.today()
        file_name = 'DescargaMasiva(Fecha de descarga' + " - " + str(date_act) + ")"
        file_name_zip = file_name + ".zip"
        zipfilepath = os.path.join(location_tempdir, file_name_zip)
        path_files = os.path.join(location_tempdir)

        # Creando zip
        for file in self:
            object_name = file.name
            ruta_ob = object_name
            object_handle = open(os.path.join(location_tempdir, ruta_ob), "wb")
            object_handle.write(isBase64_decodestring(file.datas))
            object_handle.close()

        with ZipFile(zipfilepath, 'w') as zip_obj:
            for file in os.listdir(path_files):
                file_path = os.path.join(path_files, file)
                if file_path != zipfilepath:
                    zip_obj.write(file_path, basename(file_path))

        with open(zipfilepath, 'rb') as file_data:
            bytes_content = file_data.read()
            encoded = base64.b64encode(bytes_content)

        data = {
            'name': zip_name,
            'type': 'binary',
            'datas': encoded,
            'company_id': self.env.company.id
        }
        attachment = self.env['ir.attachment'].sudo().create(data)
        self.unlink()
        return self.download_zip(file_name_zip, attachment.id)

    def download_zip(self, filename, id_file):
        path = "/web/binary/download_document?"
        model = "ir.attachment"

        url = path + "model={}&id={}&filename={}".format(model, id_file, filename)
        return {
            'type': 'ir.actions.act_url',
            'url': url,
            'target': 'self',
        }