Generate preview / detect language of encrypted messages

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

@@ -6215,16 +6215,29 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
 
                                     MessageHelper helper = new MessageHelper(imessage, context);
                                     parts = helper.getMessageParts();
-                                    String subject = parts.getProtectedSubject();
+                                    String protect_subject = parts.getProtectedSubject();
-                                    if (subject != null)
-                                        db.message().setMessageSubject(message.id, subject);
-
-                                    try {
-                                        db.beginTransaction();
 
                                     // Write decrypted body
                                     String html = parts.getHtml(context);
                                     Helper.writeText(message.getFile(context), html);
+                                    Log.i("pgp html=" + (html == null ? null : html.length()));
+
+                                    String text = HtmlHelper.getFullText(html);
+                                    message.preview = HtmlHelper.getPreview(text);
+                                    message.language = HtmlHelper.getLanguage(context, message.subject, text);
+
+                                    try {
+                                        db.beginTransaction();
+
+                                        if (protect_subject != null)
+                                            db.message().setMessageSubject(message.id, protect_subject);
+
+                                        db.message().setMessageContent(message.id,
+                                                true,
+                                                message.language,
+                                                parts.isPlainOnly(),
+                                                message.preview,
+                                                message.warning);
 
                                         // Remove existing attachments
                                         db.attachment().deleteAttachments(message.id);
@@ -6851,15 +6864,26 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
                 MessageHelper helper = new MessageHelper(imessage, context);
                 MessageHelper.MessageParts parts = helper.getMessageParts();
 
-                DB db = DB.getInstance(context);
-                try {
-                    db.beginTransaction();
-
                 // Write decrypted body
                 String html = parts.getHtml(context);
                 Helper.writeText(message.getFile(context), html);
                 Log.i("s/mime html=" + (html == null ? null : html.length()));
 
+                String text = HtmlHelper.getFullText(html);
+                message.preview = HtmlHelper.getPreview(text);
+                message.language = HtmlHelper.getLanguage(context, message.subject, text);
+
+                DB db = DB.getInstance(context);
+                try {
+                    db.beginTransaction();
+
+                    db.message().setMessageContent(message.id,
+                            true,
+                            message.language,
+                            parts.isPlainOnly(),
+                            message.preview,
+                            message.warning);
+
                     // Remove existing attachments
                     db.attachment().deleteAttachments(message.id);