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fix: nil-pointer in DeleteMediaUI, restricted delete-check in tenant handler, SCHEMA fix

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- HandleDeleteMediaUI: check err after media.Get before using asset (prevents nil-pointer panic)
- HandleTenantDeleteMedia: add restricted-user ownership check (K3)
- HandleTenantDashboard: filter media list by ownerUserID for restricted users
- SCHEMA.md: correct created_by_user_id to 'text null ... on delete set null'

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jesko Anschütz 2026-03-28 09:18:12 +01:00
parent e884acf41d
commit cc9ca2cd81
3 changed files with 16 additions and 3 deletions
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2
docs/SCHEMA.md
View file

@ -269,7 +269,7 @@ mime_type text null
checksum text null
size_bytes bigint null
enabled boolean not null default true
created_by_user_id uuid not null references users(id) on delete restrict
created_by_user_id text null references users(id) on delete set null
created_at timestamptz not null
updated_at timestamptz not null
```

6
server/backend/internal/httpapi/manage/ui.go
View file

@ -869,6 +869,10 @@ func HandleDeleteMediaUI(media *store.MediaStore, screens *store.ScreenStore, up
}
asset, err := media.Get(r.Context(), mediaID)
if err != nil {
http.Error(w, "medium nicht gefunden", http.StatusNotFound)
return
}
// K3: Restricted User darf nur eigene Medien löschen.
if u := reqcontext.UserFromContext(r.Context()); u != nil && !canDeleteMedia(u, asset) {
@ -876,7 +880,7 @@ func HandleDeleteMediaUI(media *store.MediaStore, screens *store.ScreenStore, up
return
}
if err == nil && asset.StoragePath != "" {
if asset.StoragePath != "" {
os.Remove(filepath.Join(uploadDir, filepath.Base(asset.StoragePath))) //nolint:errcheck
}
media.Delete(r.Context(), mediaID) //nolint:errcheck

11
server/backend/internal/httpapi/tenant/tenant.go
View file

@ -74,7 +74,11 @@ func HandleTenantDashboard(
return
}
assets, err := mediaStore.List(r.Context(), tenant.ID, "")
ownerUserID := ""
if u := reqcontext.UserFromContext(r.Context()); u != nil && u.Role == "restricted" {
ownerUserID = u.ID
}
assets, err := mediaStore.List(r.Context(), tenant.ID, ownerUserID)
if err != nil {
http.Error(w, "db error", http.StatusInternalServerError)
return
@ -230,6 +234,11 @@ func HandleTenantDeleteMedia(
http.Error(w, "Forbidden", http.StatusForbidden)
return
}
// K3: Restricted User darf nur eigene Medien löschen.
if u := reqcontext.UserFromContext(r.Context()); u != nil && u.Role == "restricted" && asset.CreatedByUserID != u.ID {
http.Error(w, "Forbidden", http.StatusForbidden)
return
}
if asset.StoragePath != "" {
os.Remove(filepath.Join(uploadDir, filepath.Base(asset.StoragePath))) //nolint:errcheck
}