Display live twitch chat directly in your terminal

twitch_chat.sh

#!/bin/zsh

# depends on 'websocat' https://github.com/vi/websocat
#
# twitch_chat {channel} - opens a websocket for reading chat
twitch_chat () {
  rm -f /tmp/twitch_tunnel;
  mkfifo /tmp/twitch_tunnel;
  clear;

  # Example chat msg:
  # @badge-info=;badges=;client-nonce=31ab40a7bef7162bfc8eade860eb185a;color=#DAA520;display-name=BuddysPizza;emotes=;first-msg=0;flags=;id=e86038a5-4d49-4868-aa96-b563da8fc689;mod=0;room-id=56931496;subscriber=0;tmi-sent-ts=1643181677955;turbo=0;user-id=42089909;user-type= :[email protected] PRIVMSG #badcop_ :!help

  # Format a twitch chat message
  parsechat() {
    color=$(echo -n "$1" | grep -oP "color=.*?;" | cut -d'=' -f2- | tr -d '#;\n')
    name=$(echo -n "$1" | grep -oP "display-name=.*?;" | cut -d'=' -f2- | tr -d ';\n')
    if [[ "${#color}" != "6" ]]; then
        color=${"$(echo "$name" | md5sum)":0:6}
    fi
    printf "\x1b[38;2;$(( 16#${color:0:2} ));$(( 16#${color:2:2} ));$(( 16#${color:4:2} ))m"
    printf '$name\033[0m'
    printf ": "
    echo "$1" | grep -oP "PRIVMSG.*$" | cut -d':' -f2-
  }
  # reads websocket messages and replies to pings;
  # formats chat messages and writes them to stderr
  responder() {
    while IFS= read line; do
      [[ $line == "PING"* ]] && echo "PONG :tmi.twitch.tv\r";
      [[ "$1" == *" PRIVMSG "* ]] && parsechat "$line" 1>&2;
    done;
    exit 0;
  }
  (echo "CAP REQ :twitch.tv/tags twitch.tv/commands\r\nPASS SCHMOOPIIE\r\nNICK justinfan21808\r\nJOIN #${1}\r"; \
      </tmp/twitch_tunnel | responder) \
      | websocat wss://irc-ws.chat.twitch.tv:443 \
      | >/tmp/twitch_tunnel
}