/useful/trunk-1

#!/usr/bin/env bash

####

# Launch a web browser with the chat pop-out for a YouTube live stream.

####

ARGS=()

ARGS="${@}"

__DEFAULT_BROWSER=xdg-open

__YOUTUBE_URL=""

function __usage () {

  echo ""

  echo "launch_youtube_chat.sh <YouTube-URL> [optional options]"

  echo ""

  echo "    Takes the provided URL for a YouTube Live Stream and starts a"

  echo "    web browser pointing to the address of the chat for that stream."

  echo ""

  echo " -h"

  echo " --help                       Display this help message."

  echo ""

  echo " -b <browser>" 

  echo " --browser <browser>          Use <browser> as the web browser instead"

  echo "                              of default as provided by xdg-open."

  echo ""

  exit 0

}

function __parse_youtube_url {

  __YOUTUBE_URL=$(echo $1 | sed -r 's/^.*[&?]v=(.{11})([&#].*)?$/\1/')

}

function __parse_args () {

  if [ -z "$1" ]

  then

    echo "Try --help or -h."

    exit 1

  fi

  while [[ $# -gt 0 ]]

  do

    case "${1}" in

      -b|--browser)

      __DEFAULT_BROWSER="$2"

      shift

      shift

      ;;

      -h|--help)

      __usage

      shift

      ;;

      *)

        if [[ "$__YOUTUBE_URL" == "" ]]

        then

          __parse_youtube_url $1

        else

          echo "Did you try to set the URL twice?"

          echo "Please run with --help for usage."

          exit 1

        fi

      shift

      ;;

      --)

      shift

      break

      ;;

    esac

  done

  if [[ "$__YOUTUBE_URL" == "" ]]

  then

    echo "URL not set"

    echo "Please run with --help for usage."

    exit 1

  fi

}

function __main () {

  #echo "Browser: " $__DEFAULT_BROWSER

  #echo "YouTube video-id: " $__YOUTUBE_URL

  local __final_url

  __final_url="https://www.youtube.com/live_chat?is_popout=true&v=""${__YOUTUBE_URL}"

  #echo $__final_url

  $__DEFAULT_BROWSER $__final_url

}

__parse_args "${@}"

__main