Review comments and fixing stickler complaints.

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/database_migration/gravity-db.sh

@@ -11,11 +11,11 @@
 # Please see LICENSE file for your rights under this license.
 
 upgrade_gravityDB(){
-	local version=$(sqlite3 "$1" "SELECT "value" FROM "info" WHERE "property" = 'version';")
+	local version
+	version=$(sqlite3 "$1" "SELECT "value" FROM "info" WHERE "property" = 'version';")
 
-	case "$version" in
-	1)
+	if [[ "$version" == "1" ]]; then
 		sqlite3 "$1" < "/etc/.pihole/advanced/Scripts/database_migration/gravity/1_to_2.sql"
-		;;
-	esac
+		version=2
+	fi
 }

advanced/Scripts/database_migration/gravity/1_to_2.sql

@@ -1,4 +1,4 @@
-CREATE TABLE auditlist
+CREATE TABLE domain_auditlist
 (
 	id INTEGER PRIMARY KEY AUTOINCREMENT,
 	domain TEXT UNIQUE NOT NULL,

advanced/Scripts/webpage.sh

@@ -542,24 +542,38 @@ Teleporter() {
     php /var/www/html/admin/scripts/pi-hole/php/teleporter.php > "pi-hole-teleporter_${datetimestamp}.tar.gz"
 }
 
+checkDomain()
+{
+    local domain validDomain
+    # Convert to lowercase
+    domain="${1,,}"
+    validDomain=$(grep -P "^((-|_)*[a-z\\d]((-|_)*[a-z\\d])*(-|_)*)(\\.(-|_)*([a-z\\d]((-|_)*[a-z\\d])*))*$" <<< "${domain}") # Valid chars check
+    validDomain=$(grep -P "^[^\\.]{1,63}(\\.[^\\.]{1,63})*$" <<< "${validDomain}") # Length of each label
+    echo "${validDomain}"
+}
+
 addAudit()
 {
     shift # skip "-a"
     shift # skip "audit"
-    local domains="('${1}')"
+    local domains validDomain
+    domains="('$(checkDomain "${1}")')"
     shift # skip first domain, as it has already been added
     for domain in "$@"
     do
       # Insert only the domain here. The date_added field will be
       # filled with its default value (date_added = current timestamp)
-      domains="${domains},('${domain}')"
+      validDomain="$(checkDomain "${domain}")"
+      if [[ -n "${validDomain}" ]]; then
+        domains="${domains},('${domain}')"
+      fi
     done
-    sqlite3 "${gravityDBfile}" "INSERT INTO \"auditlist\" (domain) VALUES ${domains};"
+    sqlite3 "${gravityDBfile}" "INSERT INTO \"domain_auditlist\" (domain) VALUES ${domains};"
 }
 
 clearAudit()
 {
-    sqlite3 "${gravityDBfile}" "DELETE FROM \"auditlist\";"
+    sqlite3 "${gravityDBfile}" "DELETE FROM \"domain_auditlist\";"
 }
 
 SetPrivacyLevel() {