feat: allow only the authors of task comments to edit them

pkg/models/task_comment_rights.go

@@ -27,16 +27,36 @@ func (tc *TaskComment) CanRead(s *xorm.Session, a web.Auth) (bool, int, error) {
 	return t.CanRead(s, a)
 }
 
+func (tc *TaskComment) canUserModifyTaskComment(s *xorm.Session, a web.Auth) (bool, error) {
+	t := Task{ID: tc.TaskID}
+	canWriteTask, err := t.CanWrite(s, a)
+	if err != nil {
+		return false, err
+	}
+	if !canWriteTask {
+		return false, nil
+	}
+
+	savedComment := &TaskComment{
+		ID:     tc.ID,
+		TaskID: tc.TaskID,
+	}
+	err = getTaskCommentSimple(s, savedComment)
+	if err != nil {
+		return false, err
+	}
+
+	return a.GetID() == savedComment.AuthorID, nil
+}
+
 // CanDelete checks if a user can delete a comment
 func (tc *TaskComment) CanDelete(s *xorm.Session, a web.Auth) (bool, error) {
-	t := Task{ID: tc.TaskID}
-	return t.CanWrite(s, a)
+	return tc.canUserModifyTaskComment(s, a)
 }
 
 // CanUpdate checks if a user can update a comment
 func (tc *TaskComment) CanUpdate(s *xorm.Session, a web.Auth) (bool, error) {
-	t := Task{ID: tc.TaskID}
-	return t.CanWrite(s, a)
+	return tc.canUserModifyTaskComment(s, a)
 }
 
 // CanCreate checks if a user can create a new comment