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#!/usr/bin/env python3
#
# Daily script to prepare the YK Pao School Daily Bulletin's JSON data files
# Copyright (C) 2024 Runxi Yu <https://runxiyu.org>
#
# 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 <https://www.gnu.org/licenses/>.
#
# TODO: Check for potential filename injections
#

from __future__ import annotations
from configparser import ConfigParser
import json
import argparse
import logging
import os
import shutil
import requests

logger = logging.getLogger(__name__)


def main() -> None:
    logging.basicConfig(level=logging.INFO)
    parser = argparse.ArgumentParser(description="Download Daily Inspirations")
    # parser.add_argument("--changeme", default=None, help="changeme")
    parser.add_argument(
        "--config", default="config.ini", help="path to the configuration file"
    )
    args = parser.parse_args()

    config = ConfigParser()
    config.read(args.config)

    build_path = config["general"]["build_path"]
    os.chdir(build_path)

    api_base = config["web_service"]["api_base"].rstrip("/") + "/"
    token = config["web_service"]["token"].strip()

    response_json = requests.get(
        api_base + "rs",
        headers={"Authorization": "Bearer %s" % token},
        timeout=20,
    ).json()
    assert isinstance(response_json, list)
    remote_submission_list = set(response_json)

    local_submission_list = set(
        [sn.lstrip("inspire-") for sn in os.listdir() if sn.startswith("inspire-")]
    )
    to_fetch = remote_submission_list - local_submission_list
    if to_fetch:
        logger.info("Going to fetch: %s" % ", ".join(to_fetch))
    else:
        logger.info("Nothing to fetch")
    for sn in to_fetch:
        logger.info("Fetching: %s" % sn)
        with requests.get(
            api_base + "rs/" + sn,
            headers={
                "Authorization": "Bearer %s" % token,
                "Accept-Encoding": "identity",
            },
            stream=True,
            timeout=20,
        ) as r:
            try:
                sub = json.load(r.raw)
            except json.decoder.JSONDecodeError:
                logger.error("inspire-%s is broken, skipping" % sn)
        sub["used"] = False
        sub["approved"] = False
        with open("inspire-%s" % os.path.basename(sn), "w", encoding="utf-8") as fd:
            json.dump(sub, fd, indent="\t")
        if not sub["file"]:
            logger.info("No attachment")
        else:
            logger.info("Attachment noticed")
            with requests.get(
                api_base + "rf/" + os.path.basename(sub["file"]),
                headers={
                    "Authorization": "Bearer %s" % token,
                    "Accept-Encoding": "identity",
                },
                stream=True,
                timeout=20,
            ) as r:
                with open("inspattach-%s" % os.path.basename(sub["file"]), "wb") as fd:
                    logger.info(
                        "Saved to inspattach-%s" % os.path.basename(sub["file"])
                    )
                    shutil.copyfileobj(r.raw, fd)
                    fd.flush()


if __name__ == "__main__":
    main()