Improved empty message check

app/src/main/java/eu/faircode/email/Core.java

@@ -2375,9 +2375,6 @@ class Core {
                 }
             }
 
-            if (message.total != null && message.total == 0)
-                reportEmptyMessage(context, state, account, istore);
-
             try {
                 db.beginTransaction();
 
@@ -2448,8 +2445,7 @@ class Core {
                     Log.i(folder.name + " inline downloaded message id=" + message.id +
                             " size=" + message.size + "/" + (body == null ? null : body.length()));
 
-                    Long size = parts.getBodySize();
-                    if (TextUtils.isEmpty(body) && size != null && size > 0)
+                    if (TextUtils.isEmpty(body) && parts.hasBody())
                         reportEmptyMessage(context, state, account, istore);
                 }
             }
@@ -2796,8 +2792,7 @@ class Core {
                     Log.i(folder.name + " downloaded message id=" + message.id +
                             " size=" + message.size + "/" + (body == null ? null : body.length()));
 
-                    Long size = parts.getBodySize();
-                    if (TextUtils.isEmpty(body) && size != null && size > 0)
+                    if (TextUtils.isEmpty(body) && parts.hasBody())
                         reportEmptyMessage(context, state, account, istore);
                 }
             }

app/src/main/java/eu/faircode/email/MessageHelper.java

@@ -1458,6 +1458,20 @@ public class MessageHelper {
             return (html.size() == 0);
         }
 
+        boolean hasBody() throws MessagingException {
+            List<Part> all = new ArrayList<>();
+            all.addAll(plain);
+            all.addAll(html);
+            if (all.size() == 0)
+                return true;
+
+            for (Part p : all)
+                if (p.getSize() > 0)
+                    return true;
+
+            return false;
+        }
+
         Long getBodySize() throws MessagingException {
             Long size = null;