fix dns_loopia wildcard certificate

Checks if a subdomain already exists before creating one. The loopia API clears all records for a subdomain when adding it again.

Adding TXT-records instead of updating the existing record when using the add method. Wildcard certificates require multiple TXT-records for the same subdomain. 

Now you can create wildcard certificates using:
 `acme.sh  --issue -d example.com  -d '*.example.com'  --dns dns_loopia`
Double quoting variables

dnsapi/dns_loopia.sh

@@ -38,8 +38,8 @@ dns_loopia_add() {
 
   _info "Adding record"
 
-  _loopia_add_record "$_domain" "$_sub_domain"
-  _loopia_update_record "$_domain" "$_sub_domain" "$txtvalue"
+  _loopia_add_sub_domain "$_domain" "$_sub_domain"
+  _loopia_add_record "$_domain" "$_sub_domain" "$txtvalue"
 
 }
 
@@ -96,6 +96,37 @@ dns_loopia_rm() {
 
 ####################  Private functions below ##################################
 
+_loopia_get_records() {
+  domain=$1
+  sub_domain=$2
+
+  xml_content=$(printf '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+    <methodName>getZoneRecords</methodName>
+    <params>
+      <param>
+        <value><string>%s</string></value>
+      </param>
+      <param>
+        <value><string>%s</string></value>
+      </param>
+      <param>
+        <value><string>%s</string></value>
+      </param>
+      <param>
+        <value><string>%s</string></value>
+      </param>
+    </params>
+  </methodCall>' $LOOPIA_User $LOOPIA_Password "$domain" "$sub_domain")
+
+  response="$(_post "$xml_content" "$LOOPIA_Api" "" "POST")"
+  if ! _contains "$response" "<array>"; then
+    _err "Error"
+    return 1
+  fi
+  return 0
+}
+
 _get_root() {
   domain=$1
   _debug "get root"
@@ -137,14 +168,14 @@ _get_root() {
 
 }
 
-_loopia_update_record() {
+_loopia_add_record() {
   domain=$1
   sub_domain=$2
   txtval=$3
 
   xml_content=$(printf '<?xml version="1.0" encoding="UTF-8"?>
   <methodCall>
-    <methodName>updateZoneRecord</methodName>
+    <methodName>addZoneRecord</methodName>
     <params>
       <param>
         <value><string>%s</string></value>
@@ -176,10 +207,6 @@ _loopia_update_record() {
             <name>rdata</name>
             <value><string>%s</string></value>
           </member>
-          <member>
-            <name>record_id</name>
-            <value><int>0</int></value>
-          </member>
         </struct>
       </param>
     </params>
@@ -194,10 +221,42 @@ _loopia_update_record() {
   return 0
 }
 
-_loopia_add_record() {
+_sub_domain_exists() {
+  domain=$1
+  sub_domain=$2
+
+  xml_content=$(printf '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+    <methodName>getSubdomains</methodName>
+    <params>
+      <param>
+        <value><string>%s</string></value>
+      </param>
+      <param>
+        <value><string>%s</string></value>
+      </param>
+      <param>
+        <value><string>%s</string></value>
+      </param>
+    </params>
+  </methodCall>' $LOOPIA_User $LOOPIA_Password "$domain")
+
+  response="$(_post "$xml_content" "$LOOPIA_Api" "" "POST")"
+
+  if _contains "$response" "$sub_domain"; then
+    return 0
+  fi
+  return 1
+}
+
+_loopia_add_sub_domain() {
   domain=$1
   sub_domain=$2
 
+  if _sub_domain_exists "$domain" "$sub_domain"; then
+    return 0
+  fi
+
   xml_content=$(printf '<?xml version="1.0" encoding="UTF-8"?>
   <methodCall>
     <methodName>addSubdomain</methodName>