# Copyright (C) 2017-2018  Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import os


import ick2


class BlobStore:

    def __init__(self):
        self._blobdir = None

    def get_blob_directory(self):
        return self._blobdir

    def set_blob_directory(self, dirname):
        self._blobdir = dirname
        if not os.path.exists(self._blobdir):
            os.makedirs(self._blobdir)

    def store_blob(self, name, blob):
        filename = self.blob_filename(name)
        ick2.log.log(
            'trace', msg_text='store_blob', name=name, filename=filename)
        with open(filename, 'wb') as f:
            f.write(blob)

    def store_blob_from_reader(self, name, func):
        max_size = 1024**2
        filename = self.blob_filename(name)
        ick2.log.log(
            'trace', msg_text='store_blob', name=name, filename=filename)
        with open(filename, 'wb') as f:
            for data in func(max_size):
                f.write(data)

    def get_blob(self, name):
        filename = self.blob_filename(name)
        ick2.log.log(
            'trace', msg_text='get_blob', name=name, filename=filename)
        with open(filename, 'rb') as f:
            return f.read()

    def blob_filename(self, name):
        return os.path.abspath(os.path.join(self._blobdir, name))