allow to delete comment in a ticket

csharp/App/Backend/Controller.cs

@@ -2501,6 +2501,42 @@ public class Controller : ControllerBase
         return comment;
     }
 
+    [HttpDelete(nameof(DeleteTicketComment))]
+    public async Task<ActionResult> DeleteTicketComment(Int64 id, Token authToken)
+    {
+        var user = Db.GetSession(authToken)?.User;
+        if (user is null || user.UserType != 2) return Unauthorized();
+
+        var comment = Db.TicketComments.FirstOrDefault(c => c.Id == id);
+        if (comment is null) return NotFound();
+
+        // Author-only; AI comments cannot be deleted via this endpoint.
+        if (comment.AuthorType != (Int32)CommentAuthorType.Human) return Unauthorized();
+        if (comment.AuthorId   != user.Id)                        return Unauthorized();
+
+        // Clean up S3 objects for documents attached to this comment before DB delete.
+        var s3Keys = Db.Documents
+            .Where(d => d.TicketCommentId == comment.Id)
+            .Select(d => d.S3Key)
+            .ToList();
+        if (s3Keys.Count > 0)
+        {
+            try { await DocumentBucket.DeleteObjects(s3Keys); }
+            catch (Exception ex) { Console.WriteLine($"[Documents] S3 cleanup on comment delete failed: {ex.Message}"); }
+        }
+
+        if (!Db.Delete(comment)) return StatusCode(500, "Failed to delete comment.");
+
+        var ticket = Db.GetTicketById(comment.TicketId);
+        if (ticket is not null)
+        {
+            ticket.UpdatedAt = DateTime.UtcNow;
+            Db.Update(ticket);
+        }
+
+        return Ok();
+    }
+
     [HttpGet(nameof(GetTicketDetail))]
     public ActionResult<Object> GetTicketDetail(Int64 id, Token authToken)
     {

csharp/App/Backend/Database/Db.cs

@@ -36,6 +36,7 @@ public static partial class Db
     // Ticket system tables
     public static TableQuery<Ticket>              Tickets              => Connection.Table<Ticket>();
     public static TableQuery<TicketComment>       TicketComments       => Connection.Table<TicketComment>();
+    public static TableQuery<TicketCommentMention> TicketCommentMentions => Connection.Table<TicketCommentMention>();
     public static TableQuery<TicketAiDiagnosis>   TicketAiDiagnoses    => Connection.Table<TicketAiDiagnosis>();
     public static TableQuery<TicketTimelineEvent> TicketTimelineEvents => Connection.Table<TicketTimelineEvent>();
 

csharp/App/Backend/Database/Delete.cs

@@ -129,10 +129,13 @@ public static partial class Db
                                    .Select(t => t.Id).ToList();
             foreach (var tid in ticketIds)
             {
-                // Delete documents attached to ticket comments
+                // Delete documents and mentions attached to ticket comments
                 var tCommentIds = TicketComments.Where(c => c.TicketId == tid).Select(c => c.Id).ToList();
                 foreach (var cid in tCommentIds)
+                {
                     Documents             .Delete(d => d.TicketCommentId == cid);
+                    TicketCommentMentions .Delete(m => m.CommentId       == cid);
+                }
 
                 // Delete documents attached directly to the ticket
                 Documents           .Delete(d => d.TicketId == tid);
@@ -231,13 +234,16 @@ public static partial class Db
 
         Boolean DeleteTicketAndChildren()
         {
-            // Delete documents attached to comments on this ticket
+            // Delete documents and mentions attached to comments on this ticket
             var commentIds = TicketComments
                 .Where(c => c.TicketId == ticket.Id)
                 .Select(c => c.Id)
                 .ToList();
             foreach (var cid in commentIds)
+            {
                 Documents             .Delete(d => d.TicketCommentId == cid);
+                TicketCommentMentions .Delete(m => m.CommentId       == cid);
+            }
 
             // Delete documents attached directly to the ticket
             Documents           .Delete(d => d.TicketId == ticket.Id);
@@ -256,6 +262,21 @@ public static partial class Db
         return success;
     }
 
+    public static Boolean Delete(TicketComment comment)
+    {
+        var deleteSuccess = RunTransaction(DeleteCommentAndChildren);
+        if (deleteSuccess) Backup();
+        return deleteSuccess;
+
+        Boolean DeleteCommentAndChildren()
+        {
+            // Document rows attached to this comment (S3 cleanup happens in the controller)
+            Documents             .Delete(d => d.TicketCommentId == comment.Id);
+            TicketCommentMentions .Delete(m => m.CommentId       == comment.Id);
+            return TicketComments .Delete(c => c.Id              == comment.Id) > 0;
+        }
+    }
+
     public static List<String> GetS3KeysForTicketDocuments(Int64 ticketId)
     {
         // Get documents attached directly to the ticket

typescript/frontend-marios2/src/content/dashboards/Tickets/CommentThread.tsx

@@ -9,18 +9,27 @@ import {
   CardHeader,
   Chip,
   ClickAwayListener,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogContentText,
+  DialogTitle,
   Divider,
+  IconButton,
   LinearProgress,
   MenuItem,
   MenuList,
   Paper,
   Popper,
   TextField,
+  Tooltip,
   Typography
 } from '@mui/material';
 import PersonIcon from '@mui/icons-material/Person';
 import SmartToyIcon from '@mui/icons-material/SmartToy';
 import AttachFileIcon from '@mui/icons-material/AttachFile';
+import EditIcon from '@mui/icons-material/Edit';
+import DeleteIcon from '@mui/icons-material/Delete';
 import { FormattedMessage, useIntl } from 'react-intl';
 import axiosConfig from 'src/Resources/axiosConfig';
 import { AdminUser, CommentAuthorType, TicketComment } from 'src/interfaces/TicketTypes';
@@ -49,6 +58,8 @@ function CommentThread({
   const [editingId, setEditingId] = useState<number | null>(null);
   const [editBody, setEditBody] = useState('');
   const [savingEdit, setSavingEdit] = useState(false);
+  const [deleteCandidateId, setDeleteCandidateId] = useState<number | null>(null);
+  const [deletingId, setDeletingId] = useState<number | null>(null);
   const fileInputRef = useRef<HTMLInputElement>(null);
   const [selectedFiles, setSelectedFiles] = useState<File[]>([]);
   const [uploading, setUploading] = useState(false);
@@ -147,6 +158,23 @@ function CommentThread({
     setEditBody('');
   };
 
+  const confirmDelete = async () => {
+    if (deleteCandidateId == null) return;
+    const id = deleteCandidateId;
+    setDeletingId(id);
+    try {
+      await axiosConfig.delete('/DeleteTicketComment', { params: { id } });
+      setDeleteCandidateId(null);
+      if (editingId === id) {
+        setEditingId(null);
+        setEditBody('');
+      }
+      onCommentAdded();
+    } finally {
+      setDeletingId(null);
+    }
+  };
+
   const saveEdit = async (commentId: number) => {
     if (!editBody.trim()) return;
     setSavingEdit(true);
@@ -274,14 +302,28 @@ function CommentThread({
                     </Typography>
                   )}
                   {canEdit && !isEditing && (
-                    <Button
+                    <Box sx={{ ml: 'auto', display: 'flex', gap: 0.5 }}>
+                      <Tooltip title={intl.formatMessage({ id: 'edit', defaultMessage: 'Edit' })}>
+                        <IconButton
                           size="small"
-                      variant="text"
-                      sx={{ minWidth: 0, p: 0, ml: 'auto', textTransform: 'none' }}
                           onClick={() => startEdit(comment)}
+                          aria-label={intl.formatMessage({ id: 'edit', defaultMessage: 'Edit' })}
                         >
-                      <FormattedMessage id="edit" defaultMessage="Edit" />
+                          <EditIcon fontSize="small" />
-                    </Button>
+                        </IconButton>
+                      </Tooltip>
+                      <Tooltip title={intl.formatMessage({ id: 'delete', defaultMessage: 'Delete' })}>
+                        <IconButton
+                          size="small"
+                          color="error"
+                          onClick={() => setDeleteCandidateId(comment.id)}
+                          disabled={deletingId === comment.id}
+                          aria-label={intl.formatMessage({ id: 'delete', defaultMessage: 'Delete' })}
+                        >
+                          <DeleteIcon fontSize="small" />
+                        </IconButton>
+                      </Tooltip>
+                    </Box>
                   )}
                 </Box>
                 {isEditing ? (
@@ -422,6 +464,38 @@ function CommentThread({
           {uploading && <LinearProgress />}
         </Box>
       </CardContent>
+      <Dialog
+        open={deleteCandidateId !== null}
+        onClose={() => deletingId === null && setDeleteCandidateId(null)}
+      >
+        <DialogTitle>
+          <FormattedMessage id="deleteComment" defaultMessage="Delete comment" />
+        </DialogTitle>
+        <DialogContent>
+          <DialogContentText>
+            <FormattedMessage
+              id="deleteCommentConfirm"
+              defaultMessage="This will permanently delete the comment and any attachments. Continue?"
+            />
+          </DialogContentText>
+        </DialogContent>
+        <DialogActions>
+          <Button
+            onClick={() => setDeleteCandidateId(null)}
+            disabled={deletingId !== null}
+          >
+            <FormattedMessage id="cancel" defaultMessage="Cancel" />
+          </Button>
+          <Button
+            onClick={confirmDelete}
+            color="error"
+            variant="contained"
+            disabled={deletingId !== null}
+          >
+            <FormattedMessage id="delete" defaultMessage="Delete" />
+          </Button>
+        </DialogActions>
+      </Dialog>
     </Card>
   );
 }

typescript/frontend-marios2/src/lang/de.json

@@ -573,6 +573,8 @@
   "comments": "Kommentare",
   "noComments": "Noch keine Kommentare.",
   "commentEdited": "(bearbeitet {time})",
+  "deleteComment": "Kommentar löschen",
+  "deleteCommentConfirm": "Der Kommentar und alle Anhänge werden dauerhaft gelöscht. Fortfahren?",
   "commentMarkdownHint": "Markdown: **fett**, #, ##",
   "commentFormatBold": "Fett",
   "commentFormatH1": "Überschrift 1",

typescript/frontend-marios2/src/lang/en.json

@@ -321,6 +321,8 @@
   "comments": "Comments",
   "noComments": "No comments yet.",
   "commentEdited": "(edited {time})",
+  "deleteComment": "Delete comment",
+  "deleteCommentConfirm": "This will permanently delete the comment and any attachments. Continue?",
   "commentMarkdownHint": "Markdown: **bold**, #, ##",
   "commentFormatBold": "Bold",
   "commentFormatH1": "Heading 1",

typescript/frontend-marios2/src/lang/fr.json

@@ -573,6 +573,8 @@
   "comments": "Commentaires",
   "noComments": "Aucun commentaire pour le moment.",
   "commentEdited": "(modifié {time})",
+  "deleteComment": "Supprimer le commentaire",
+  "deleteCommentConfirm": "Le commentaire et toutes les pièces jointes seront définitivement supprimés. Continuer ?",
   "commentMarkdownHint": "Markdown : **gras**, #, ##",
   "commentFormatBold": "Gras",
   "commentFormatH1": "Titre 1",

typescript/frontend-marios2/src/lang/it.json

@@ -573,6 +573,8 @@
   "comments": "Commenti",
   "noComments": "Nessun commento ancora.",
   "commentEdited": "(modificato {time})",
+  "deleteComment": "Elimina commento",
+  "deleteCommentConfirm": "Il commento e tutti gli allegati saranno eliminati definitivamente. Continuare?",
   "commentMarkdownHint": "Markdown: **grassetto**, #, ##",
   "commentFormatBold": "Grassetto",
   "commentFormatH1": "Titolo 1",