Homestuck Bot Script

from mastodon import Mastodon
import requests
from PIL import Image, ImageSequence
from io import BytesIO
import time
import os
from shutil import move
from tempfile import TemporaryFile, NamedTemporaryFile

mastodon = Mastodon(
	access_token = '(redacted)',
	api_base_url = 'https://botsin.space/'
)

def post_img(fname):
	if '|' in fname:
		alttext, fname = fname.split(sep='|')
	else:
		alttext = ''
	ext = fname[-4:]
	if ext == ".gif":
		im = Image.open(fname)
		if im.size[0] * im.size[1] >= 1280 * 720:
			tf = TemporaryFile()
			frame = im.copy()
			frame.save(tf, format="png")
			while True:
				try:
					tf.seek(0)
					m = mastodon.media_post(tf.read(), mime_type="png", description=alttext)
					time.sleep(15)
					mastodon.status_post("", media_ids = m)
					tf.close()
					im.close()
					return 0
				except:
					time.sleep(5)
					continue
		if im.is_animated:
			frames = []
			durations = []
			for frame in ImageSequence.Iterator(im):
				frames.append(frame.copy())
				durations.append(frame.info['duration'])
			k = len(frames)
			for _ in range(10):
				for i in range(k):
					frames.append(frames[i].copy())
					durations.append(durations[i])
			tf = TemporaryFile()
			frames[0].save(tf, format="gif", save_all=True, append_images=frames[1:], duration=durations)
			while True:
				try:
					tf.seek(0)
					m = mastodon.media_post(tf.read(), mime_type="gif", description=alttext)
					time.sleep(15)
					mastodon.status_post("", media_ids = m)
					tf.close()
					im.close()
					return 0
				except:
					time.sleep(5)
					continue
	while True:
		try:
			m = mastodon.media_post(fname, description=alttext)
			time.sleep(15)
			mastodon.status_post("", media_ids = m)
			return 0
		except:
			time.sleep(5)
			continue

def post_text(s):
	time.sleep(15)
	if len(s) > 500:  # max
		return -1
	while True:
		try:
			mastodon.status_post(s)
			return 0
		except:
			time.sleep(5)
			continue

def job():
	file_path = "botdata.txt"
	# Fetch first line of file, then delete it
	f_in = open(file_path, 'r')
	f_out = NamedTemporaryFile(mode='w', delete=False)
	temp_path = f_out.name
	firstLine = f_in.readline().strip()
	if len(firstLine) >= 4 and firstLine[-4:] in [".gif", ".jpg", ".png"]:
		ret = post_img(firstLine)
	else:
		ret = post_text(firstLine)
	if ret != 0:
		err_msg = "@Paravellex@shrike.club I broke! Reboot me! Line was: " + firstLine
		if len(err_msg) > 500:
			err_msg = err_msg[:499]
		mastodon.status_post(err_msg, visibility="direct")
		raise RuntimeError
	for line in f_in:
		f_out.write(line)
	f_in.close()
	f_out.close()
	os.remove(file_path)
	move(temp_path, file_path)

halfhours = (time.time() - 15) // 1800
while True:
	time.sleep(1)
	if ((time.time() - 15) // 1800) > halfhours:
		job()
		halfhours += 1