confirmation mail now template based.

src/main/java/de/srsoftware/widerhall/data/ListMember.java

@@ -1,9 +1,13 @@
 package de.srsoftware.widerhall.data;
 
+import de.srsoftware.widerhall.Configuration;
 import de.srsoftware.widerhall.Util;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.stringtemplate.v4.ST;
 
+import javax.mail.MessagingException;
+import java.io.UnsupportedEncodingException;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.*;
@@ -87,7 +91,7 @@ public class ListMember {
      * @return
      * @throws SQLException
      */
-    public static User confirm(String token) throws SQLException {
+    public static ListMember confirm(String token) throws SQLException {
         var rs = Database.open().select(TABLE_NAME).where(TOKEN,token).compile().exec();
         if (rs.next()){
             var lm = ListMember.from(rs);
@@ -103,12 +107,25 @@ public class ListMember {
                         .compile()
                         .run();
             }
-            return lm.user;
+            return lm;
         }
         return null;
     }
 
-
+    public void sendConfirmationMail(ST template) throws SQLException, MessagingException {
+        var subject = t("[{}] Subscription complete!",list.name());
+        var data = new HashMap<String,Object>();
+        data.put(USER,user.safeMap());
+        data.put(LIST,list.minimalMap());
+        data.put(URL,Configuration.instance().baseUrl()+"/web/index");
+        if (list.isOpenForSubscribers()) data.put("open_list",true);
+        var text = template.add("data",data).render();
+        try {
+            list.smtp().send(list.email(),list.name(),user.email(),subject,text);
+        } catch (UnsupportedEncodingException e) {
+            LOG.warn("Failed to send list subscription confirmation!",e);
+        }
+    }
     /**
      * Create a new list member entry in the database.
      * If the member has the state AWAITING_CONFIRMATION, a token is assigned with the member, too.