#!/bin/sh

bestip=$(dig +short a tilde.best)

[! -d /var/lib/byod] && mkdir /var/lib/byod && mkdir /var/lib/byod/user && mkdir /var/lib/byod/domain

for byod in /home/*/byod; do
    user=$(stat -c '%U' $byod)
    domain=$(cat $byod)
    echo "$user is requesting $domain"
    if [ -f /var/lib/byod/$domain ]; then
        echo "byod already configured for $domain"
        previousUser=$(cat /var/lib/byod/user/$user)
        if [! "$user" -eq "$previousUser"]; then
            error="ERROR: The domain $domain was already reclaimed by $previousUser"
            echo "$error"
            mail=$(printf "From: root@tilde.best\nTo: $user\nSubject: BYOD failed to add domain $domain\n$error\n.\n")
            echo "$mail" | sendmail -t
            continue
        fi
    else
        domainip=$(dig +short a $domain)
        if [ "$bestip" == "$domainip" ]; then
            echo "$domain" > /var/lib/byod/user/$user
            echo "$user" > /var/lib/byod/domain/$domain
            sed -e "s/<user>/$user/" -e "s/<domain>/$domain/" template.conf \
                > /etc/nginx/sites-available/byod-$domain.conf
            ln -s ../sites-available/byod-$domain.conf /etc/nginx/sites-enabled/byod-$domain.conf
            certbot --nginx -d $domain --non-interactive --redirect
        else
            echo "domain's dns not configured correctly"
        fi
    fi
done

nginx -t

if [ "$?" -eq "0" ]; then
    nginx -s reload
else
    echo "failed to validate new nginx config, see previous error"
fi