spotify-downloader/spotdl/command_line/lib.py

from spotdl.metadata.providers import ProviderSpotify
from spotdl.metadata.providers import ProviderYouTube
from spotdl.metadata.providers import YouTubeSearch
from spotdl.metadata.embedders import EmbedderDefault
from spotdl.metadata.exceptions import SpotifyMetadataNotFoundError
import spotdl.metadata

from spotdl.encode.encoders import EncoderFFmpeg
from spotdl.encode.encoders import EncoderAvconv

from spotdl.lyrics.providers import LyricWikia
from spotdl.lyrics.providers import Genius
from spotdl.lyrics.exceptions import LyricsNotFoundError

from spotdl.authorize.services import AuthorizeSpotify

from spotdl.track import Track
import spotdl.util
import spotdl.config

from spotdl.command_line.exceptions import NoYouTubeVideoFoundError
from spotdl.command_line.exceptions import NoYouTubeVideoMatchError
from spotdl.metadata_search import MetadataSearch

from spotdl.helpers.spotify import SpotifyHelpers

import sys
import os
import urllib.request

import logging
logger = logging.getLogger(__name__)


class Spotdl:
    def __init__(self, arguments):
        if "config" in arguments:
            # Make sure we set the base configuration from the config file if
            # the config file has been passed.
            config = spotdl.util.merge(
                spotdl.config.DEFAULT_CONFIGURATION["spotify-downloader"],
                spotdl.config.get_config(arguments["config"])
            )
        else:
            # If config file has not been passed, set the base configuration
            # to the default confguration.
            config = spotdl.config.DEFAULT_CONFIGURATION["spotify-downloader"]

        self.arguments = spotdl.util.merge(config, arguments)

    def __enter__(self):
        return self

    def __exit__(self, type, value, traceback):
        del self

    def match_arguments(self):
        AuthorizeSpotify(
            client_id=self.arguments["spotify_client_id"],
            client_secret=self.arguments["spotify_client_secret"]
        )
        spotify_tools = SpotifyHelpers()
        logger.debug("Received arguments:\n{}".format(self.arguments))

        if self.arguments["song"]:
            for track in self.arguments["song"]:
                if track == "-":
                    for line in sys.stdin:
                        self.download_track(
                            line,
                            self.arguments
                        )
                else:
                    self.download_track(track)
        elif self.arguments["list"]:
            if self.arguments["write_m3u"]:
                self.write_m3u(
                    self.arguments["list"],
                    self.arguments["write_to"]
                )
            else:
                list_download = {
                    "synchronous": self.download_tracks_from_file,
                    # "threaded"  : self.download_tracks_from_file_threaded,
                }[self.arguments["processor"]]

                list_download(
                    self.arguments["list"],
                )
        elif self.arguments["playlist"]:
            playlist = spotify_tools.fetch_playlist(self.arguments["playlist"])
            spotify_tools.write_playlist_tracks(playlist, self.arguments["write_to"])
        elif self.arguments["album"]:
            album = spotify_tools.fetch_album(self.arguments["album"])
            spotify_tools.write_album_tracks(album, self.arguments["write_to"])
        elif self.arguments["all_albums"]:
            albums = spotify_tools.fetch_albums_from_artist(self.arguments["all_albums"])
            spotify_tools.write_all_albums(albums, self.arguments["write_to"])
        elif self.arguments["username"]:
            playlist_url = spotify_tools.prompt_for_user_playlist(self.arguments["username"])
            playlist = spotify_tools.fetch_playlist(playlist_url)
            spotify_tools.write_playlist_tracks(playlist, self.arguments["write_to"])

    def write_m3u(self, track_file, target_file=None):
        with open(track_file, "r") as fin:
            tracks = fin.read().splitlines()

        logger.info(
            "Checking and removing any duplicate tracks in {}.".format(track_file)
        )
        # Remove duplicates and empty elements
        # Also strip whitespaces from elements (if any)
        tracks = spotdl.util.remove_duplicates(
            tracks,
            condition=lambda x: x,
            operation=str.strip
        )

        if target_file is None:
            target_file = "{}.m3u".format(track_file.split(".")[0])

        total_tracks = len(tracks)
        logger.info("Generating {0} from {1} YouTube URLs.".format(target_file, total_tracks))
        with open(target_file, "w") as output_file:
            output_file.write("#EXTM3U\n\n")

        videos = []
        for n, track in enumerate(tracks, 1):
            try:
                search_metadata = MetadataSearch(
                    track,
                    lyrics=False,
                    yt_search_format=self.arguments["search_format"],
                    yt_manual=self.arguments["manual"]
                )
                video = search_metadata.best_on_youtube_search()
            except (NoYouTubeVideoFoundError, NoYouTubeVideoMatchError) as e:
                logger.error(e.args[0])
            else:
                logger.info(
                    "Matched track {0}/{1} ({2})".format(
                        str(n).zfill(len(str(total_tracks))),
                        total_tracks,
                        video["url"],
                    )
                )
                m3u_key = "#EXTINF:{duration},{title}\n{youtube_url}\n".format(
                    duration=spotdl.util.get_sec(video["duration"]),
                    title=video["title"],
                    youtube_url=video["url"],
                )
                logger.debug(m3u_key.strip())
                with open(target_file, "a") as output_file:
                    output_file.write(m3u_key)

    def download_track(self, track):
        logger.info('Downloading "{}"'.format(track))
        search_metadata = MetadataSearch(
            track,
            lyrics=not self.arguments["no_metadata"],
            yt_search_format=self.arguments["search_format"],
            yt_manual=self.arguments["manual"]
        )
        try:
            if self.arguments["no_metadata"]:
                metadata = search_metadata.on_youtube()
            else:
                metadata = search_metadata.on_youtube_and_spotify()
        except (NoYouTubeVideoFoundError, NoYouTubeVideoMatchError) as e:
            logger.error(e.args[0])
        else:
            self.download_track_from_metadata(metadata)

    def should_we_overwrite_existing_file(self):
        if self.arguments["overwrite"] == "force":
            logger.info("Forcing overwrite on existing file.")
            to_overwrite = True
        elif self.arguments["overwrite"] == "prompt":
            to_overwrite = input("Overwrite? (y/N): ").lower() == "y"
        else:
            logger.info("Not overwriting existing file.")
            to_overwrite = False

        return to_overwrite

    def download_track_from_metadata(self, metadata):
        track = Track(metadata, cache_albumart=(not self.arguments["no_metadata"]))
        stream = metadata["streams"].get(
            quality=self.arguments["quality"],
            preftype=self.arguments["input_ext"],
        )

        Encoder = {
            "ffmpeg": EncoderFFmpeg,
            "avconv": EncoderAvconv,
        }.get(self.arguments["encoder"])

        if Encoder is None:
            output_extension = stream["encoding"]
        else:
            output_extension = self.arguments["output_ext"]

        filename = spotdl.metadata.format_string(
            self.arguments["output_file"],
            metadata,
            output_extension=output_extension,
            sanitizer=lambda s: spotdl.util.sanitize(
                s, spaces_to_underscores=self.arguments["no_spaces"]
            )
        )
        download_to_stdout = filename == "-"
        if download_to_stdout:
            temp_filename = filename
        else:
            temp_filename = "{filename}.temp".format(filename=filename)

        to_skip_download = self.arguments["dry_run"]
        if os.path.isfile(filename):
            logger.info('A file with name "{filename}" already exists.'.format(
                filename=filename
            ))
            to_skip_download = to_skip_download \
                or not self.should_we_overwrite_existing_file()

        if to_skip_download:
            logger.debug("Skip track download.")
            return

        if not self.arguments["no_metadata"]:
            metadata["lyrics"].start()

        logger.info('Downloading to "{filename}"'.format(filename=filename))
        if Encoder is None:
            track.download(stream, temp_filename)
        else:
            track.download_while_re_encoding(
                stream,
                temp_filename,
                target_encoding=output_extension,
                encoder=Encoder()
            )

        if not self.arguments["no_metadata"]:
            track.metadata["lyrics"] = track.metadata["lyrics"].join()
            self.apply_metadata(track, temp_filename, output_extension)

        if not download_to_stdout:
            os.rename(temp_filename, filename)

    def apply_metadata(self, track, filename, encoding):
        logger.info("Applying metadata")
        try:
            track.apply_metadata(filename, encoding=encoding)
        except TypeError:
            logger.warning("Cannot apply metadata on provided output format.")

    def download_tracks_from_file(self, path):
        logger.info(
            "Checking and removing any duplicate tracks in {}.".format(path)
        )
        tracks = spotdl.util.readlines_from_nonbinary_file(path)
        # Remove duplicates and empty elements
        # Also strip whitespaces from elements (if any)
        tracks = spotdl.util.remove_duplicates(
            tracks,
            condition=lambda x: x,
            operation=str.strip
        )
        # Overwrite file
        spotdl.util.writelines_to_nonbinary_file(path, tracks)

        logger.info(
            "Downloading {n} tracks.\n".format(n=len(tracks))
        )

        for position, track in enumerate(tracks, 1):
            search_metadata = MetadataSearch(
                track,
                lyrics=True,
                yt_search_format=self.arguments["search_format"],
                yt_manual=self.arguments["manual"]
            )
            try:
                log_track_query = '{position}. Downloading "{track}"'.format(
                    position=position,
                    track=track
                )
                logger.info(log_track_query)
                metadata = search_metadata.on_youtube_and_spotify()
                self.download_track_from_metadata(metadata)
            except (urllib.request.URLError, TypeError, IOError) as e:
                logger.exception(e.args[0])
                logger.warning(
                    "Failed to download current track due to possible network issue. "
                    "Will retry after other songs."
                )
                tracks.append(track)
            except (NoYouTubeVideoFoundError, NoYouTubeVideoMatchError) as e:
                logger.error("{err}".format(err=e.args[0]))
            else:
                if self.arguments["write_successful"]:
                    with open(self.arguments["write_successful"], "a") as fout:
                        fout.write(track)
            finally:
                spotdl.util.writelines_to_nonbinary_file(path, tracks[position:])
                print("", file=sys.stderr)

    """
    def download_tracks_from_file_threaded(self, path):
        # FIXME: Can we make this function cleaner?

        logger.info(
            "Checking and removing any duplicate tracks in {}.\n".format(path)
        )
        with open(path, "r") as fin:
            # Read tracks into a list and remove any duplicates
            tracks = fin.read().splitlines()

        # Remove duplicates and empty elements
        # Also strip whitespaces from elements (if any)
        spotdl.util.remove_duplicates(
            tracks,
            condition=lambda x: x,
            operation=str.strip
        )

        # Overwrite file
        with open(path, "w") as fout:
            fout.writelines(tracks)

        tracks_count = len(tracks)
        current_iteration = 1

        next_track = tracks.pop(0)
        metadata = {
            "current_track": None,
            "next_track": spotdl.util.ThreadWithReturnValue(
                target=search_metadata,
                args=(next_track, self.arguments["search_format"])
            )
        }
        metadata["next_track"].start()
        while tracks_count > 0:
            metadata["current_track"] = metadata["next_track"].join()
            metadata["next_track"] = None
            try:
                print(tracks_count, file=sys.stderr)
                print(tracks, file=sys.stderr)
                if tracks_count > 1:
                    current_track = next_track
                    next_track = tracks.pop(0)
                    metadata["next_track"] = spotdl.util.ThreadWithReturnValue(
                        target=search_metadata,
                        args=(next_track, self.arguments["search_format"])
                    )
                    metadata["next_track"].start()

                log_track_query = str(current_iteration) + ". {artist} - {track-name}"
                logger.info(log_track_query)
                if metadata["current_track"] is None:
                    logger.warning("Something went wrong. Will retry after downloading remaining tracks.")
                    pass
                print(metadata["current_track"]["name"], file=sys.stderr)
                # self.download_track_from_metadata(metadata["current_track"])
            except (urllib.request.URLError, TypeError, IOError) as e:
                print("", file=sys.stderr)
                logger.exception(e.args[0])
                logger.warning("Failed. Will retry after other songs\n")
                tracks.append(current_track)
            else:
                tracks_count -= 1
                if self.arguments["write_successful"]:
                    with open(self.arguments["write_successful"], "a") as fout:
                        fout.write(current_track)
            finally:
                current_iteration += 1
                with open(path, "w") as fout:
                    fout.writelines(tracks)
    """