#!/usr/bin/env bash
set -e

# super quickly hacked together script
# for listing your twitch following from the command-line.

# REQUIREMENTS:
#   editing this script.
#   downloading a python script.
#   python 2 or 3.
#   a web browser.
#   curl.
#   GNU sort.
#   GNU awk.

# KNOWN ISSUES:
#   output is not always sorted by viewer count.

# TODO:
#   fix known issues.
#   automatically extract relevant values from a cURL string.
#   add toggle for colors.
#   optional CSV output.
#   automatically download json2?
#   rewrite in python?

# fill these in with values extracted from your browser's
# "copy as cURL" feature.
# 1. open a new tab in Chromium or Firefox; these instructions apply to either.
# 2. open the web inspector (ctrl+shift+I) and click on the network tab.
# 3. go to https://www.twitch.tv/directory/following/live
#    make sure this is with the network tab already open!
#    if it isn't, open it up and just refresh the page.
# 4. type "followed" in the filter of the network tab.
# 5. right click on the first result and click copy as cURL.
#    in Chromium, it's in a submenu as "copy as cURL (bash)"
# 6. paste into a text editor and extract the following header values:
#    (each header is specified by a -H flag)
cookie="cookie: [fill me in!]"
client_id="client-id: [fill me in!]"

# note: technically, you only need the "persistent" cookie.

json2() {
    # download this from https://github.com/vi/json2/blob/master/json2
    # and edit this line accordingly.
    python ~/src/json2/json2 "$@"
}

curl -LsS 'https://api.twitch.tv/kraken/streams/followed?limit=100&stream_type=all' \
    -H 'accept: application/vnd.twitchtv.v5+json' \
    -H "$cookie" \
    -H "$client_id" | json2 | sort -n | awk '
function trunc(s,L) {
    e = length(s) > L ? "…" : "";
    return (substr(s, 0, L -(e ? 1 : 0)) e);
}
$1~/\/game$/{game=substr($2,2)}
$1~/\/channel\/status$/{status=substr($2,2)}
$1~/\/channel\/name$/{name=substr($2,2)}
$1~/\/viewers$/{
    viewers=substr($2,2);
    printf "\x1b[90m%5s\x1b[0m \x1b[97m%-25s\x1b[0m %s\n      \x1b[1m%s\x1b[0m\n",
      viewers, name, trunc(game, 48), status;
}
' FPAT='(^[^=]+)|(=.*)'