#!/bin/sh

#
# Get an authorization bearer from twitter.
#


#
# Print usage message and exit
#
usage()
{
	echo "usage: $(basename $0) [-a authorization_bearer]"
	exit 1
}


while getopts a: f; do
	case $f in
	a) authorization_bearer=$OPTARG ;;
	\?) usage ;;
	esac
done
shift $((OPTIND - 1))

if [ -z "${authorization_bearer}" ]; then
	authorization_bearer=$(twitter_authorization_bearer)
fi

curl -fgs \
    -X POST \
    -A '' \
    -H "Authorization: Bearer ${authorization_bearer}" \
    "https://api.twitter.com/1.1/guest/activate.json" |
    json2tsv | awk -F '\t' '$1 == ".guest_token" { print $3 }'