From 31780eb14db9e7ef5cb7f7988a041825fd68453d Mon Sep 17 00:00:00 2001
From: user <user@example.net>
Date: Wed, 14 Aug 2019 18:28:55 +0200
Subject: [PATCH] One config per domain + /var/lib/byod/ to store this info

---
 admin.sh | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/admin.sh b/admin.sh
index e49043b..794270e 100644
--- a/admin.sh
+++ b/admin.sh
@@ -2,20 +2,30 @@
 
 bestip=$(dig +short a tilde.best)
 
+[! -d /var/lib/byod] && mkdir /var/lib/byod
+
 for byod in /home/*/byod; do
     user=$(stat -c '%U' $byod)
     domain=$(cat $byod)
     echo "$user is requesting $domain"
-    if [ -s /etc/nginx/sites-enabled/byod-$user-$domain.conf ]; then
-        echo "byod already configured for $user at $domain"
-        continue
+    if [ -s /etc/nginx/sites-enabled/byod-$domain.conf ]; 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" == "$domainip" ]
-        then
+        if [ "$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>/$domain/" template.conf \
-                > /etc/nginx/sites-available/byod-$user-$domain.conf
-            ln -s ../sites-available/byod-$user-$domain.conf /etc/nginx/sites-enabled/byod-$user-$domain.conf
+                > /etc/nginx/sites-available/byod-$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"
@@ -24,5 +34,9 @@ for byod in /home/*/byod; do
 done
 
 nginx -t
-systemctl reload nginx
 
+if ["$?" -eq "0"]; then
+    nginx -s reload
+else
+    echo "failed to validate new nginx config, see previous error"
+fi