Fix message import dialog (#1489685):

- Display alert if no file is chosen
- Unlock the UI if form is not submitted
- Avoid duplicate error messages
- Fix javascript error due to missing attachments list widget

program/js/app.js

@@ -1177,8 +1177,12 @@ function rcube_webmail()
 
       case 'import-messages':
         var form = props || this.gui_objects.importform;
-        $('input[name="_unlock"]', form).val(this.set_busy(true, 'importwait'));
-        this.upload_file(form, 'import');
+        var importlock = this.set_busy(true, 'importwait');
+        $('input[name="_unlock"]', form).val(importlock);
+        if (!this.upload_file(form, 'import')) {
+          this.set_busy(false, null, importlock);
+          alert(this.get_label('selectimportfile'));
+        }
         break;
 
       case 'import':
@@ -4015,11 +4019,13 @@ function rcube_webmail()
       if (this.env.upload_progress_time) {
         this.upload_progress_start('upload', ts);
       }
-    }
 
       // set reference to the form object
       this.gui_objects.attachmentform = form;
       return true;
+    }
+
+    return false;
   };
 
   // add file name to attachment list
@@ -4061,8 +4067,10 @@ function rcube_webmail()
 
   this.remove_from_attachment_list = function(name)
   {
+    if (this.env.attachments) {
       delete this.env.attachments[name];
       $('#'+name).remove();
+    }
   };
 
   this.remove_attachment = function(name)

program/steps/mail/func.inc

@@ -124,7 +124,7 @@ if (empty($RCMAIL->action) || $RCMAIL->action == 'list') {
     if (!$OUTPUT->ajax_call) {
         $OUTPUT->add_label('checkingmail', 'deletemessage', 'movemessagetotrash',
             'movingmessage', 'copyingmessage', 'deletingmessage', 'markingmessage',
-            'copy', 'move', 'quota', 'replyall', 'replylist', 'importwait');
+            'copy', 'move', 'quota', 'replyall', 'replylist');
     }
 
     $pagetitle = $RCMAIL->localize_foldername($RCMAIL->storage->mod_folder($mbox_name), true);
@@ -2070,6 +2070,7 @@ function rcmail_message_import_form($attrib = array())
         $content);
 
     $RCMAIL->output->add_gui_object('importform', $attrib['id'].'Frm');
+    $RCMAIL->output->add_label('selectimportfile','importwait');
 
     return html::div($attrib, $out);
 }

program/steps/mail/import.inc

@@ -34,7 +34,6 @@ if (is_array($_FILES['_file'])) {
             list($mtype_primary,) = explode('/', rcube_mime::file_content_type($filepath, $_FILES['_file']['name'][$i], $_FILES['_file']['type'][$i]));
 
             if (!in_array($mtype_primary, array('text','message'))) {
-                $OUTPUT->show_message('importmessageerror', 'error');
                 continue;
             }
 
@@ -46,7 +45,6 @@ if (is_array($_FILES['_file'])) {
             while ($line !== false && trim($line) == '');
 
             if (!preg_match('/^From\s+-/', $line) && !preg_match('/^[a-z-_]+:\s+.+/i', $line)) {
-                $OUTPUT->show_message('importmessageerror', 'error');
                 continue;
             }