#!/usr/bin/env python3
# Copyright (C) 2022 Jonathan A. Poritz
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU 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 General Public License for more details.
#
#
#

import csv

fh=open('repository-export.csv', 'r')

for line in csv.DictReader(fh):
  if line["dc.type"][:4]=="book":
    license = line["BITSTREAM License"]
    if ("creativecommons.org/licenses/by/" in license) or ("creativecommons.org/licenses/by-sa/" in license) or ("creativecommons.org/licenses/by-nc/" in license) or ("creativecommons.org/licenses/by-nc-sa/" in license) or ("creativecommons.org/publicdomain/zero" in license):
      print(line["dc.date.issued"][:4])