#! /bin/sh -e

if [ $# -ne 1 ]; then
    echo "Usage: $0 TEAM" 1>&2
    exit 64
fi

escape () {
    sed 's/&/\&amp;/g;s/</\&lt;/g;s/>/\&gt;/g'
}

# Don't overwrite files
set -C

base=${CTF_BASE:-/var/lib/ctf}
www=${CTF_BASE:-/var/www}

mkdir -p $base/teams/names
mkdir -p $base/teams/colors

# Assign a color.  I spent two days selecting this color pallette for
# people with protanopia.  Please don't change these colors.
nteams=$(ls $base/teams/names/ | wc -l)
case $(expr $nteams % 15) in
    0) color=8c7a69 ;;
    1) color=7f7062 ;;
    2) color=79614b ;;
    3) color=a59281 ;;
    4) color=a59485 ;;
    5) color=4a4f5e ;;
    6) color=454955 ;;
    7) color=343c52 ;;
    8) color=696f82 ;;
    9) color=6b7182 ;;
    10) color=516b55 ;;
    11) color=4b614f ;;
    12) color=395d3f ;;
    13) color=6d8c72 ;;
    14) color=708c75 ;;
    *)
        echo 'ERROR ERROR' 1>&2
        echo 'DOES NOT COMPUTE' 1>&2
        exit 69
        ;;
esac

# Compute hash of team name; they'll use this for everything in the
# contest instead of their team name, which makes stuff much easier on
# me since all team hashes are in the set /[0-9a-f]{8}/.
hash=$(echo "$1" | md5sum | cut -b 1-8)

echo "$1" > $base/teams/names/$hash
echo "$color" > $base/teams/colors/$hash

echo "Registered with hash: $hash"

# Write teams.html if it's an actual contest
$(dirname $0)/teams.sh > $www/teams.html.new && mv $www/teams.html.new $www/teams.html