mirror of
https://github.com/Garmelon/PFERD.git
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256 lines
10 KiB
Python
256 lines
10 KiB
Python
"""
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Convenience functions for using PFERD.
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"""
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import logging
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from pathlib import Path
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from typing import Callable, List, Optional, Union
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from .cookie_jar import CookieJar
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from .diva import (DivaDownloader, DivaDownloadStrategy, DivaPlaylistCrawler,
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diva_download_new)
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from .errors import FatalException, swallow_and_print_errors
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from .ilias import (IliasAuthenticator, IliasCrawler, IliasDirectoryFilter,
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IliasDownloader, IliasDownloadInfo, IliasDownloadStrategy,
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KitShibbolethAuthenticator, download_modified_or_new)
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from .location import Location
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from .logging import PrettyLogger
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from .organizer import Organizer
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from .tmp_dir import TmpDir
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from .transform import TF, Transform, apply_transform
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from .utils import PathLike, to_path
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# TODO save known-good cookies as soon as possible
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LOGGER = logging.getLogger(__name__)
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PRETTY = PrettyLogger(LOGGER)
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class Pferd(Location):
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# pylint: disable=too-many-arguments
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"""
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The main entrypoint in your Pferd usage: This class combines a number of
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useful shortcuts for running synchronizers in a single interface.
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"""
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def __init__(
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self,
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base_dir: Path,
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tmp_dir: Path = Path(".tmp"),
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test_run: bool = False
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):
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super().__init__(Path(base_dir))
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self._tmp_dir = TmpDir(self.resolve(tmp_dir))
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self._test_run = test_run
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@staticmethod
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def _print_transformables(transformables: List[TF]) -> None:
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LOGGER.info("")
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LOGGER.info("Results of the test run:")
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for transformable in transformables:
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LOGGER.info(transformable.path)
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def _ilias(
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self,
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target: PathLike,
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base_url: str,
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crawl_function: Callable[[IliasCrawler], List[IliasDownloadInfo]],
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authenticator: IliasAuthenticator,
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cookies: Optional[PathLike],
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dir_filter: IliasDirectoryFilter,
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transform: Transform,
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download_strategy: IliasDownloadStrategy,
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clean: bool = True
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) -> Organizer:
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# pylint: disable=too-many-locals
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cookie_jar = CookieJar(to_path(cookies) if cookies else None)
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session = cookie_jar.create_session()
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tmp_dir = self._tmp_dir.new_subdir()
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organizer = Organizer(self.resolve(to_path(target)))
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crawler = IliasCrawler(base_url, session, authenticator, dir_filter)
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downloader = IliasDownloader(tmp_dir, organizer, session, authenticator, download_strategy)
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cookie_jar.load_cookies()
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info = crawl_function(crawler)
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cookie_jar.save_cookies()
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transformed = apply_transform(transform, info)
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if self._test_run:
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self._print_transformables(transformed)
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return organizer
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downloader.download_all(transformed)
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cookie_jar.save_cookies()
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if clean:
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organizer.cleanup()
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return organizer
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@swallow_and_print_errors
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def ilias_kit(
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self,
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target: PathLike,
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course_id: str,
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dir_filter: IliasDirectoryFilter = lambda x, y: True,
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transform: Transform = lambda x: x,
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cookies: Optional[PathLike] = None,
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username: Optional[str] = None,
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password: Optional[str] = None,
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download_strategy: IliasDownloadStrategy = download_modified_or_new,
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clean: bool = True,
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) -> Organizer:
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"""
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Synchronizes a folder with the ILIAS instance of the KIT.
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Arguments:
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target {Path} -- the target path to write the data to
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course_id {str} -- the id of the main course page (found in the URL after ref_id
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when opening the course homepage)
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Keyword Arguments:
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dir_filter {IliasDirectoryFilter} -- A filter for directories. Will be applied on the
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crawler level, these directories and all of their content is skipped.
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(default: {lambdax:True})
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transform {Transform} -- A transformation function for the output paths. Return None
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to ignore a file. (default: {lambdax:x})
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cookies {Optional[Path]} -- The path to store and load cookies from.
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(default: {None})
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username {Optional[str]} -- The SCC username. If none is given, it will prompt
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the user. (default: {None})
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password {Optional[str]} -- The SCC password. If none is given, it will prompt
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the user. (default: {None})
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download_strategy {DownloadStrategy} -- A function to determine which files need to
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be downloaded. Can save bandwidth and reduce the number of requests.
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(default: {download_modified_or_new})
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clean {bool} -- Whether to clean up when the method finishes.
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"""
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# This authenticator only works with the KIT ilias instance.
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authenticator = KitShibbolethAuthenticator(username=username, password=password)
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PRETTY.starting_synchronizer(target, "ILIAS", course_id)
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return self._ilias(
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target=target,
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base_url="https://ilias.studium.kit.edu/",
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crawl_function=lambda crawler: crawler.crawl_course(course_id),
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authenticator=authenticator,
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cookies=cookies,
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dir_filter=dir_filter,
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transform=transform,
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download_strategy=download_strategy,
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clean=clean,
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)
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@swallow_and_print_errors
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def ilias_kit_personal_desktop(
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self,
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target: PathLike,
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dir_filter: IliasDirectoryFilter = lambda x, y: True,
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transform: Transform = lambda x: x,
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cookies: Optional[PathLike] = None,
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username: Optional[str] = None,
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password: Optional[str] = None,
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download_strategy: IliasDownloadStrategy = download_modified_or_new,
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clean: bool = True,
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) -> Organizer:
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"""
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Synchronizes a folder with the ILIAS instance of the KIT. This method will crawl the ILIAS
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"personal desktop" instead of a single course.
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Arguments:
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target {Path} -- the target path to write the data to
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Keyword Arguments:
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dir_filter {IliasDirectoryFilter} -- A filter for directories. Will be applied on the
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crawler level, these directories and all of their content is skipped.
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(default: {lambdax:True})
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transform {Transform} -- A transformation function for the output paths. Return None
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to ignore a file. (default: {lambdax:x})
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cookies {Optional[Path]} -- The path to store and load cookies from.
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(default: {None})
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username {Optional[str]} -- The SCC username. If none is given, it will prompt
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the user. (default: {None})
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password {Optional[str]} -- The SCC password. If none is given, it will prompt
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the user. (default: {None})
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download_strategy {DownloadStrategy} -- A function to determine which files need to
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be downloaded. Can save bandwidth and reduce the number of requests.
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(default: {download_modified_or_new})
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clean {bool} -- Whether to clean up when the method finishes.
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"""
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# This authenticator only works with the KIT ilias instance.
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authenticator = KitShibbolethAuthenticator(username=username, password=password)
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PRETTY.starting_synchronizer(target, "ILIAS", "Personal Desktop")
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return self._ilias(
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target=target,
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base_url="https://ilias.studium.kit.edu/",
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crawl_function=lambda crawler: crawler.crawl_personal_desktop(),
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authenticator=authenticator,
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cookies=cookies,
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dir_filter=dir_filter,
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transform=transform,
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download_strategy=download_strategy,
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clean=clean,
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)
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@swallow_and_print_errors
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def diva_kit(
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self,
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target: Union[PathLike, Organizer],
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playlist_location: str,
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transform: Transform = lambda x: x,
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download_strategy: DivaDownloadStrategy = diva_download_new,
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clean: bool = True
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) -> Organizer:
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"""
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Synchronizes a folder with a DIVA playlist.
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Arguments:
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organizer {Organizer} -- The organizer to use.
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playlist_location {str} -- the playlist id or the playlist URL
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in the format 'https://mediaservice.bibliothek.kit.edu/#/details/DIVA-2019-271'
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Keyword Arguments:
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transform {Transform} -- A transformation function for the output paths. Return None
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to ignore a file. (default: {lambdax:x})
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download_strategy {DivaDownloadStrategy} -- A function to determine which files need to
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be downloaded. Can save bandwidth and reduce the number of requests.
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(default: {diva_download_new})
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clean {bool} -- Whether to clean up when the method finishes.
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"""
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tmp_dir = self._tmp_dir.new_subdir()
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if playlist_location.startswith("http"):
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playlist_id = DivaPlaylistCrawler.fetch_id(playlist_link=playlist_location)
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else:
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playlist_id = playlist_location
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if target is None:
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PRETTY.starting_synchronizer("None", "DIVA", playlist_id)
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raise FatalException("Got 'None' as target directory, aborting")
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if isinstance(target, Organizer):
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organizer = target
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else:
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organizer = Organizer(self.resolve(to_path(target)))
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PRETTY.starting_synchronizer(organizer.path, "DIVA", playlist_id)
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crawler = DivaPlaylistCrawler(playlist_id)
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downloader = DivaDownloader(tmp_dir, organizer, download_strategy)
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info = crawler.crawl()
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transformed = apply_transform(transform, info)
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if self._test_run:
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self._print_transformables(transformed)
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return organizer
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downloader.download_all(transformed)
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if clean:
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organizer.cleanup()
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return organizer
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