/home/report/report/utility/file_manager/ Current File: //home/report/report/utility/file_manager/interfaces.py
from .Drivers import Drivers
from decouple import config
from utility.file_manager.Drivers import get_extension


class FileManager:
    accepted_extensions = ['.jpeg', '.png', '.jpg', '.pdf']
    allowed_size = 5120000
    driver = getattr(Drivers, config('FILE_DRIVER'))

    @staticmethod
    def save(files, user=None, from_url=False):
        """ handle save file in selected driver
        Args :

        - files : List of django InMemoryUploadedFile object (get from request)

        - user : User object who upload this file

        Return :
            saved Files Objects | error
        """
        response = []

        for file in files:
            if files[file].size > FileManager.allowed_size:
                raise Exception('سایز فایل از حداکثر بیشتر است.')
            if not get_extension(files[file].name).lower() in FileManager.accepted_extensions:
                raise Exception('فرمت فایل مجاز نمی باشد.')

            result = FileManager.driver.save(files[file], user,
                                             from_url=from_url) if not from_url else FileManager.driver.save(
                file, user, from_url=from_url)
            response.append(result)

        return response

    @staticmethod
    def delete(file):
        """ handle delete file in selected driver
        Args :

        - file : File object

        Return :
            True | error
        """
        try:
            result = FileManager.driver.delete()
            return result
        except Exception as e:
            return e

    # @staticmethod
    # def relation(file_id, r_type, type_id):
    #     """ handle file relation with other types
    #
    #     Args :
    #
    #     - file_id : file id of relation
    #
    #     - r_type : The type of module to which the file relates
    #
    #     - type_id : The id of module to which the file relates
    #
    #     Return :
    #         FileRelation object | error
    #     """
    #     try:
    #         file = File.objects.get(pk=file_id)
    #         relation = FileRelation.objects.create(file=file, type=r_type, type_id=type_id)
    #         relation.save()
    #         return relation
    #     except Exception as e:
    #         return e