#!/bin/bash
# download the chat log corresponding to a given .description file from youtube-dl
# usage: holochat.sh [youtube-dl description file]

# activate chat_downloader virtualenv
source /home/anon/src/chat-replay-downloader/venv/bin/activate
# extract base filename, used to name log file and probe video file
base_filename=`echo "$1" | sed -e 's/\.description$//'`
# extract youtube video ID from base filename
video_id=`echo "${base_filename}" | grep -o ".\{11\}$"`
# download chat log
/home/anon/src/chat-replay-downloader/venv/bin/chat_downloader --cookies /path/to/cookies.txt --message_type all --chat_type live "https://youtube.com/watch?v=${video_id}" > "${base_filename}".log &&
# update log timestamp to match description
touch -r "${base_filename}".description "${base_filename}".log
# print last lines of log and duration of corresponding video, to verify log was completely downloaded
tail "${base_filename}".log
# this is incredibly crude, and exploits the fact that 'jpg' and 'description' don't contain 'm',
# but mkv, webm, and mp4 videos all do.
ffprobe -i "${base_filename}".*m* 2>&1 |grep Duration