reddit-mastodon-crossposter/script.py

"""Main script to toot a new post"""

from os import getenv, remove
from os.path import getsize

import praw
import wget
from dotenv import load_dotenv
from mastodon import Mastodon
from redvid import Downloader

# ----- load .env ----- #

load_dotenv()

# ----- initialization ----- #

# initialize reddit
reddit = praw.Reddit(
    client_id = getenv("REDDIT_CLIENT_ID"),
    client_secret = getenv("REDDIT_CLIENT_SECRET"),
    redirect_uri = "http://localhost:8080",         # does not matter what is here
    user_agent = getenv("REDDIT_USER_AGENT")
)

# initialize mastodon
mastodon = Mastodon(
    access_token = getenv("MASTODON_USER_SECRET"),
    api_base_url = getenv("MASTODON_URL")
)

# ----- main script ----- #

# get recent posts to check for duplicates
last_posts = mastodon.account_statuses(getenv("MASTODON_USER_ID"), limit=15)

for submission in reddit.subreddit(str(getenv("REDDIT_SUBREDDIT"))).top(time_filter="day", limit=10):
    # skip post if it is a stickied post
    if (submission.stickied):
        continue

    # check if the post has been posted before
    already_posted = False
    for posted_submission in last_posts:
        if submission.permalink in posted_submission["content"]:
            already_posted = True
            break
    # abort download if the post has been posted already
    if already_posted:
        print("Skipping post: https://www.reddit.com" + submission.permalink)
        continue

    # check if text only
    if submission.is_self:
        status_text = submission.title + "\n\ngeposted von u/" + submission.author.name + "\n" + submission.permalink + "\n\n" + submission.selftext
        mastodon.status_post(status_text, visibility="unlisted")
    # check if reddit video
    elif "v.redd.it" in submission.url:
        # download video with highest possible resolution while not exceeding 10MB
        print("Downloading video post: https://www.reddit.com" + submission.permalink)
        downloader = Downloader(url="https://www.reddit.com"+submission.permalink, filename="video.mp4", max_s=10_000_000, auto_max=True)
        return_val = downloader.download()

        print("\nUploading video")

        # check if video was downloaded successfully (digit return value if unsuccessful, otherwise string value containing the path to the video)
        if str(return_val).isdigit():
            status_text = submission.title + "\n\nDas gepostete Video ist leider zu groß für diesen Server. Das Video bzw. der Post kann über den untenstehenden Link aufgerufen werden. " + "\n\ngeposted von u/" + submission.author.name + "\nhttps://www.reddit.com" + submission.permalink
            mastodon.status_post(status_text, visibility="unlisted")
        else:
            media = mastodon.media_post(filename)
            status_text = submission.title + "\n\ngeposted von u/" + submission.author.name + "\nhttps://www.reddit.com" + submission.permalink
            mastodon.status_post(status_text, media_ids=media["id"], visibility="unlisted")

        remove(filename)
    else:
        print("Downloading image post: https://www.reddit.com" + submission.permalink)
        filename = wget.download(submission.url, out="image." + submission.url.split(".")[-1])

        print("\nUploading image")
        media = mastodon.media_post(filename)
        status_text = submission.title + "\n\ngeposted von u/" + submission.author.name + "\nhttps://www.reddit.com" + submission.permalink
        mastodon.status_post(status_text, media_ids=media["id"], visibility="unlisted")

        remove(filename)
    break