robocyp/main.py

#!/usr/bin/env python
import argparse
import csv
import os
import sys

from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError

_playlists = {}


def _truncate_title(title: str, length: int = 30) -> str:
    if length <= 0:
        return ""
    if length <= 3:
        return title[:length]
    if len(title) <= length:
        return title
    return title[:length-3].strip() + (title[length:] and '...')


def get_yt_creds():
    """ Get YouTube API credentials """
    creds = None
    client_secrets_file = "client_secrets_file.json"
    scopes = ["https://www.googleapis.com/auth/youtube.force-ssl"]

    # The file token.json stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists("token.json"):
        creds = Credentials.from_authorized_user_file("token.json", scopes)

    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                client_secrets_file, scopes
            )
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open("token.json", "w") as token:
            token.write(creds.to_json())

    return creds


def exit_on_exceeded_quota(e: HttpError):
    if e.resp.status == 403:
        for error in e.error_details:
            if error.get('reason') == 'quotaExceeded':
                print('Youtube quota exceeded, exiting')
                sys.exit(1)


def read_playlists_file():
    """ Read playlists.csv and return a dictionary of playlist names to playlist IDs """
    global _playlists
    if not os.path.exists('playlists.csv'):
        print('playlists.csv not found')
        return {}
    with open('playlists.csv', newline='') as csvfile:
        reader = csv.DictReader(csvfile)
        _playlists = {row['name']: row['playlist_id'] for row in reader}


def get_playlist_id(playlist_name: str) -> str:
    if not _playlists:
        read_playlists_file()
    return _playlists.get(playlist_name, playlist_name)


def get_playlist_name(playlist_id: str) -> str:
    if not _playlists:
        read_playlists_file()
    return next((name for name, plid in _playlists.items()
                 if plid == playlist_id), playlist_id)


def get_videos(yt_api, playlist_id):
    playlist_name = get_playlist_name(playlist_id)
    videos = []
    fetched = 0
    overall = -1
    page_token = ""
    try:
        while fetched < overall or overall == -1:
            response = yt_api.playlistItems().list(
                part="snippet,contentDetails",
                maxResults=50,
                playlistId=playlist_id,
                pageToken=page_token
            ).execute()
            if overall == -1:
                overall = response['pageInfo']['totalResults']
            fetched += len(response['items'])
            page_token = response.get('nextPageToken', "")
            for item in response['items']:
                videos.append(item)
    except HttpError as e:
        exit_on_exceeded_quota(e)
        print(f'Error getting video IDs from playlist {playlist_name}: {e}')

    print(f'Fetched {fetched} videos from playlist {playlist_name}')
    return videos


def add_video_to_playlist(yt_api, video, playlist_id,
                          dry_run: bool = False) -> bool:
    playlist_name = get_playlist_name(playlist_id)
    video_id = video['snippet']['resourceId']['videoId']
    video_title = _truncate_title(video['snippet']['title'])
    try:
        if dry_run:
            print(f"Would add video '{video_title}' [{video_id}] to playlist {playlist_name}")
            return True
        yt_api.playlistItems().insert(
            part='snippet',
            body={
                'snippet': {
                    'playlistId': playlist_id,
                    'resourceId': {
                        'kind': 'youtube#video',
                        'videoId': video_id
                    }
                }
            }
        ).execute()
        print(f"Added video '{video_title}' [{video_id}] to playlist {playlist_name}")
        return True
    except HttpError as e:
        exit_on_exceeded_quota(e)
        print(f"Error adding video '{video_title}' [{video_id}] to playlist {playlist_name}: {e}")
        return False


def remove_video_from_playlist(yt_api, video, playlist_id,
                               dry_run: bool = False) -> bool:
    playlist_name = get_playlist_name(playlist_id)
    video_id = video['snippet']['resourceId']['videoId']
    video_title = _truncate_title(video['snippet']['title'])
    try:
        if dry_run:
            print(f"Would remove video '{video_title}' [{video_id}]"
                  f" from playlist {playlist_name}")
            return True
        yt_api.playlistItems().delete(
            id=video['id']
        ).execute()
        print(f"Removed video '{video_title}' [{video_id}]"
              f" from playlist {playlist_name}")
        return True
    except HttpError as e:
        exit_on_exceeded_quota(e)
        print(f"Error removing video '{video_title}' [{video_id}]"
              f" from playlist {playlist_name}: {e}")
        return False


def copy_playlist_items(yt_api,
                        src_playlist: str,
                        dst_playlist: str,
                        delete_from_src: bool = False,
                        limit: int = -1,
                        dry_run: bool = False):
    if limit < 0:
        limit = len(src_playlist)

    src_videos = get_videos(yt_api, src_playlist)
    dst_videos = get_videos(yt_api, dst_playlist)

    dst_video_map = {video['snippet']['resourceId']['videoId']: video['id']
                     for video in dst_videos}

    for src_video in src_videos[:limit]:
        video_id = src_video['snippet']['resourceId']['videoId']
        if video_id not in dst_video_map:
            add_video_to_playlist(yt_api, src_video, dst_playlist, dry_run)
        if delete_from_src:
            remove_video_from_playlist(yt_api, src_video, src_playlist, dry_run)


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('-n', '--dry-run', action='store_true',
                        help='Dry run, do not send changes to YoutubeAPI')
    subparsers = parser.add_subparsers(title='commands', dest='command')

    parser_move = subparsers.add_parser('move', help='Move videos from one playlist to another')
    parser_move.add_argument('src_playlist', help='Source playlist ID')
    parser_move.add_argument('dst_playlist', help='Destination playlist ID')
    parser_move.add_argument('-l', '--limit', type=int, default=-1,
                             help='Limit number of videos to process')

    parser_copy = subparsers.add_parser('copy', help='Copy videos from one playlist to another')
    parser_copy.add_argument('src_playlist', help='Source playlist ID')
    parser_copy.add_argument('dst_playlist', help='Destination playlist ID')
    parser_copy.add_argument('-l', '--limit', type=int, default=-1,
                             help='Limit number of videos to process')

    args = parser.parse_args()

    # Disable OAuthlib's HTTPS verification when running locally.
    # *DO NOT* leave this option enabled in production.
    os.environ["OAUTHLIB_INSECURE_TRANSPORT"] = "1"
    api_service_name = "youtube"
    api_version = "v3"
    creds = get_yt_creds()
    youtube = build(api_service_name, api_version, credentials=creds)

    if args.command is None:
        parser.print_help()
        return 1
    elif args.command == 'copy':
        src_playlist = get_playlist_id(args.src_playlist)
        dst_playlist = get_playlist_id(args.dst_playlist)
        copy_playlist_items(youtube, src_playlist, dst_playlist,
                            delete_from_src=False,
                            limit=args.limit, dry_run=args.dry_run)
    elif args.command == 'move':
        src_playlist = get_playlist_id(args.src_playlist)
        dst_playlist = get_playlist_id(args.dst_playlist)
        copy_playlist_items(youtube, src_playlist, dst_playlist,
                            delete_from_src=True,
                            limit=args.limit, dry_run=args.dry_run)


if __name__ == '__main__':
    sys.exit(main())