improved archive: storage dir cannow be configured. also, mails are now displayed in send-time order

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

@@ -93,6 +93,7 @@ public class Database {
         private final StringBuilder sql; // buffer the sql to be built
         private final HashMap<String, List<Object>> where = new HashMap<>(); // buffer condition statements for select
         private final HashMap<String,Object> values = new HashMap<>(); // buffer values for insert/update statements
+        private final List<String> sortFields = new ArrayList<>();
 
         /**
          * Start to create a new request with the initial SQL
@@ -126,6 +127,10 @@ public class Database {
             }
         }
 
+        private void applySorting(){
+            if (!sortFields.isEmpty()) sql.append(" ORDER BY ").append(String.join(", ",sortFields));
+        }
+
         @Override
         protected Request clone() {
             Request clone = new Request(sql);
@@ -142,6 +147,7 @@ public class Database {
             var args = new ArrayList<>();
             applyValues(args);
             applyConditions(args);
+            applySorting();
             return new CompiledRequest(sql.toString(),args);
         }
 
@@ -245,6 +251,11 @@ public class Database {
             list.add(value);
             return this;
         }
+
+        public Request sort(String field) {
+            sortFields.add(field);
+            return this;
+        }
     }
 
     public Database(Connection connection) {