nickel

backend/drive/permissions.py

@@ -37,13 +37,15 @@ def space_rights(user, space):
     if space.private_owner_id:
         # Never expose someone else's private contents, including to admins.
         return set(RIGHTS) if space.private_owner_id == user.pk else set()
-    if _is_admin(user) or space.managed_by_id == user.pk:
-        return set(RIGHTS)
-    if space.user_id == user.pk:
+    if _is_admin(user):
         return set(RIGHTS)
+    # A grant can also explicitly limit an assigned owner or manager, whose
+    # historical roles otherwise implied full access.
     grant = SpaceGrant.objects.filter(space=space, user=user).first()
     if grant:
         return set(grant.permissions) if grant.permissions is not None else set(legacy_rights(write=grant.can_write, invite=grant.can_invite))
+    if space.managed_by_id == user.pk or space.user_id == user.pk:
+        return set(RIGHTS)
     if space.parent_id and space.can_view_parent and space.user_id == user.pk:
         return set(legacy_rights(write=space.can_write_parent, invite=space.can_invite))
     # Historical assigned-space access (parent) for legacy sub-users.

backend/drive/test_space_reparent_and_access.py

@@ -0,0 +1,154 @@
+"""Run: USE_SQLITE=true python manage.py test drive.test_space_reparent_and_access"""
+import tempfile
+import uuid
+from pathlib import Path
+
+from django.contrib.auth import get_user_model
+from django.test import TestCase, override_settings
+from rest_framework.test import APIClient
+
+from .models import DriveItem, DriveSpace, SpaceGrant
+from .permissions import space_rights
+from .spaces import _make_numbered_space, ensure_space, ensure_private_space
+from .quotas import occupancy
+
+
+class SpaceReparentingTests(TestCase):
+    def setUp(self):
+        tmp = tempfile.TemporaryDirectory()
+        self.addCleanup(tmp.cleanup)
+        self.storage = Path(tmp.name)
+        override = override_settings(DRIVE_STORAGE_ROOT=self.storage,
+                                     FILE_UPLOAD_TEMP_DIR=str(self.storage / '.uploads'))
+        override.enable()
+        self.addCleanup(override.disable)
+        User = get_user_model()
+        self.admin = User.objects.create_superuser('space-admin', 'admin@example.com', 'password-for-tests')
+        self.member = User.objects.create_user('space-member', password='password-for-tests')
+        self.client = APIClient()
+        self.client.force_authenticate(self.admin)
+        self.root = ensure_space(self.admin)
+        gb = 1024 ** 3
+        self.root.quota_bytes = 100 * gb
+        self.root.save(update_fields=['quota_bytes'])
+        self.a = _make_numbered_space(self.root, managed_by=self.admin,
+                                      display_name='A', quota_bytes=60 * gb)
+        self.b = _make_numbered_space(self.root, managed_by=self.admin,
+                                      display_name='B', quota_bytes=50 * gb)
+        self.child = _make_numbered_space(self.a, managed_by=self.admin,
+                                          display_name='Child', quota_bytes=30 * gb)
+        self.nested = _make_numbered_space(self.child, managed_by=self.admin,
+                                           display_name='Nested', quota_bytes=10 * gb)
+        self.old_path = self.child.relative_path
+        self.file = DriveItem.objects.create(owner=self.admin, space=self.nested,
+                        name='example.pdf', size=15,
+                        storage_key=str(uuid.uuid4()),
+                        storage_location=f'{self.nested.relative_path}/example.pdf')
+        filepath = self.storage / self.file.storage_location
+        filepath.parent.mkdir(parents=True, exist_ok=True)
+        filepath.write_bytes(b'important bytes')
+
+    def test_move_subtree_preserves_files_and_nested_spaces(self):
+        res = self.client.patch(f'/api/drive/spaces/{self.child.pk}/',
+                    {'parent_space': self.b.pk}, format='json')
+        self.assertEqual(res.status_code, 200, res.data)
+        self.child.refresh_from_db()
+        self.nested.refresh_from_db()
+        self.file.refresh_from_db()
+        expected = f'{self.b.relative_path}/{self.child.directory_name}'
+        self.assertEqual(self.child.parent_id, self.b.pk)
+        self.assertEqual(self.child.relative_path, expected)
+        self.assertEqual(self.nested.relative_path, f'{expected}/{self.nested.directory_name}')
+        self.assertEqual(self.file.storage_location,
+                         f'{self.nested.relative_path}/example.pdf')
+        self.assertEqual((self.storage / self.file.storage_location).read_bytes(), b'important bytes')
+        self.assertFalse((self.storage / self.old_path).exists())
+        self.assertEqual(occupancy(self.b)[0], 15)
+        self.assertEqual(occupancy(self.a)[0], 0)
+
+    def test_move_refused_if_it_would_create_cycle(self):
+        res = self.client.patch(f'/api/drive/spaces/{self.a.pk}/',
+                    {'parent_space': self.nested.pk}, format='json')
+        self.assertEqual(res.status_code, 400, res.data)
+        self.a.refresh_from_db()
+        self.assertEqual(self.a.parent_id, self.root.pk)
+        self.assertTrue((self.storage / self.old_path).exists())
+
+    def test_move_rolls_back_when_new_quota_is_insufficient(self):
+        res = self.client.patch(f'/api/drive/spaces/{self.child.pk}/',
+                    {'parent_space': self.b.pk, 'quota_bytes': 0}, format='json')
+        self.assertEqual(res.status_code, 400, res.data)
+        self.child.refresh_from_db()
+        self.file.refresh_from_db()
+        self.assertEqual(self.child.parent_id, self.a.pk)
+        self.assertEqual(self.child.relative_path, self.old_path)
+        self.assertTrue((self.storage / self.file.storage_location).is_file())
+
+    def test_manage_space_without_create_right_on_target_cannot_move(self):
+        SpaceGrant.objects.create(user=self.member, space=self.child,
+                                  permissions=['view','manage_space'])
+        SpaceGrant.objects.create(user=self.member, space=self.b,
+                                  permissions=['view'])
+        self.client.force_authenticate(self.member)
+        res = self.client.patch(f'/api/drive/spaces/{self.child.pk}/',
+                    {'parent_space': self.b.pk}, format='json')
+        self.assertEqual(res.status_code, 403, res.data)
+        self.child.refresh_from_db()
+        self.assertEqual(self.child.parent_id, self.a.pk)
+
+    def test_private_space_keeps_its_separate_physical_storage(self):
+        SpaceGrant.objects.create(user=self.member, space=self.child,
+                                  permissions=['view','download'])
+        private = ensure_private_space(self.member)
+        self.assertTrue(private.relative_path.startswith('privates/'))
+        res = self.client.patch(f'/api/drive/spaces/{self.child.pk}/',
+                    {'parent_space': self.b.pk}, format='json')
+        self.assertEqual(res.status_code, 200, res.data)
+        private.refresh_from_db()
+        self.assertEqual(private.parent_id, self.child.pk)
+        self.assertTrue((self.storage/private.relative_path).is_dir())
+
+    def test_assigned_space_move_does_not_grant_parent_permissions(self):
+        assigned = _make_numbered_space(self.a, user=self.member, display_name='Assigned',
+                           quota_bytes=10 * 1024**3, can_view_parent=True,
+                           can_write_parent=True, can_invite=True,
+                           parent_permissions=['view','download','add','manage_access'])
+        self.assertIn('manage_access', space_rights(self.member,self.a))
+        res = self.client.patch(f'/api/drive/spaces/{assigned.pk}/',
+                    {'parent_space':self.b.pk}, format='json')
+        self.assertEqual(res.status_code,200,res.data)
+        assigned.refresh_from_db()
+        self.assertFalse(assigned.can_view_parent)
+        self.assertFalse(assigned.can_invite)
+        self.assertFalse(space_rights(self.member,self.b))
+
+    def test_move_is_blocked_by_occupied_destination_quota(self):
+        huge = 50 * 1024**3
+        DriveItem.objects.create(owner=self.admin,space=self.b,name='full.bin',size=huge,
+                                 storage_key=str(uuid.uuid4()),storage_location='legacy-file')
+        res = self.client.patch(f'/api/drive/spaces/{self.child.pk}/',
+                    {'parent_space':self.b.pk},format='json')
+        self.assertEqual(res.status_code,400,res.data)
+        self.child.refresh_from_db()
+        self.assertEqual(self.child.parent_id,self.a.pk)
+        self.assertTrue((self.storage/self.old_path).is_dir())
+
+    def test_admin_edits_direct_and_assigned_access_without_creating_duplicates(self):
+        assigned = _make_numbered_space(self.root, user=self.member,
+                           display_name='Assigned', quota_bytes=10 * 1024**3)
+        listing = self.client.get(f'/api/drive/admin/users/{self.member.pk}/access/')
+        self.assertEqual(listing.status_code, 200, listing.data)
+        self.assertEqual(sum(a['space_id'] == assigned.pk for a in listing.data['accesses']), 1)
+        url = f'/api/drive/admin/users/{self.member.pk}/access/owner/{assigned.pk}/'
+        saved = self.client.patch(url, {'permissions':['view','download']}, format='json')
+        self.assertEqual(saved.status_code, 200, saved.data)
+        self.assertEqual(space_rights(self.member, assigned), {'view','download'})
+        denied = self.client.patch(url, {'permissions':['modify']}, format='json')
+        self.assertEqual(denied.status_code, 400, denied.data)
+        listing = self.client.get(f'/api/drive/admin/users/{self.member.pk}/access/')
+        self.assertEqual(sum(a['space_id'] == assigned.pk for a in listing.data['accesses']), 1)
+        self.assertEqual(next(access['permissions'] for access in listing.data['accesses']
+                              if access['space_id'] == assigned.pk), ['view','download'])
+        revoked = self.client.delete(url)
+        self.assertEqual(revoked.status_code, 204)
+        self.assertFalse(SpaceGrant.objects.filter(user=self.member,space=assigned).exists())

backend/drive/views_spaces.py

@@ -10,6 +10,7 @@ from django.contrib.auth import get_user_model
 from django.contrib.auth.password_validation import validate_password
 from django.core.exceptions import ValidationError
 from django.db import transaction, IntegrityError
+from django.db import models
 from django.utils import timezone
 from rest_framework.decorators import api_view, permission_classes, throttle_classes
 from rest_framework.permissions import AllowAny
@@ -396,6 +397,108 @@ def create_shared_space(request):
     return Response(space_info(space,request.user),status=201)
 
 
+def _relocate_shared_space(user, space, target_parent_id):
+    """Change an entire shared-space subtree's physical and logical parent.
+
+    Called with a DB transaction and all DriveSpace rows locked. Database
+    changes happen before the single same-filesystem directory rename; caller
+    reverses the rename if the transaction fails.
+    """
+    from .quotas import ancestry, occupancy, subtree_space_ids
+    from .storage_layout import disk_path
+
+    if space.private_owner_id or space.parent_id is None:
+        raise ValueError('L’espace racine et les espaces privés ne peuvent pas changer de parent.')
+    try:
+        target = DriveSpace.objects.get(pk=int(target_parent_id), private_owner__isnull=True)
+    except (TypeError, ValueError, DriveSpace.DoesNotExist):
+        raise ValueError('Espace parent introuvable.') from None
+    if target.pk == space.parent_id:
+        return None  # No permission required to retain the existing parent.
+    if not has_space_right(user, space, 'manage_space') or not has_space_right(user, target, 'create_spaces'):
+        raise PermissionError('Tu dois pouvoir gérer cet espace et créer des espaces dans le nouveau parent.')
+    descendants = subtree_space_ids(space)
+    if target.pk in descendants:
+        raise ValueError('Impossible de déplacer un espace dans lui-même ou dans un de ses sous-espaces.')
+    if target.private_owner_id:
+        raise ValueError('Un espace privé ne peut pas être parent.')
+
+    old_prefix = space.relative_path
+    new_prefix = '/'.join(filter(None, [target.relative_path, space.directory_name]))
+    if not old_prefix or not space.directory_name or len(new_prefix) > 700:
+        raise ValueError('Déplacement impossible pour cet espace.')
+
+    # All the actual files and pending uploads of this subtree must fit in
+    # each NEW ancestor. Common ancestors already include that usage.
+    from .quotas import ancestry, occupancy
+    subtree_used, subtree_pending = occupancy(space)
+    former_ancestors = {node.pk for node in ancestry(space)}
+    for ancestor in ancestry(target):
+        if ancestor.pk in former_ancestors or ancestor.quota_bytes is None:
+            continue
+        used, pending = occupancy(ancestor)
+        if used + pending + subtree_used + subtree_pending > ancestor.quota_bytes:
+            raise ValueError('Le nouvel espace parent n’a pas assez de capacité disponible.')
+    caps = [node.quota_bytes for node in ancestry(target) if node.quota_bytes is not None]
+    max_allowed = min(caps) if caps else None
+    if max_allowed is not None:
+        if DriveSpace.objects.filter(pk__in=descendants, private_owner__isnull=True).filter(
+            models.Q(quota_bytes__isnull=True) | models.Q(quota_bytes__gt=max_allowed)
+        ).exists():
+            raise ValueError('Le quota d’un sous-espace dépasse celui du nouveau parent.')
+
+    # Refuse to move mid-upload: it can change the path during a file write.
+    if UploadSession.objects.filter(space_id__in=descendants).exists():
+        raise ValueError('Termine ou annule les transferts en cours avant de changer le parent.')
+    if DriveSpace.objects.filter(pk__in=descendants, private_owner__isnull=False).exclude(
+            relative_path__startswith='privates/').exists():
+        raise ValueError('Déplace d’abord les anciens espaces privés vers storage/privates/.')
+
+    source = disk_path(old_prefix)
+    destination = disk_path(new_prefix)
+    if not source.is_dir() or source.is_symlink():
+        raise ValueError('Le dossier de l’espace est introuvable ou invalide.')
+    if destination.exists() or destination.is_symlink():
+        raise ValueError('Un dossier existe déjà à cet emplacement.')
+    if not destination.parent.is_dir():
+        raise ValueError('Le répertoire du nouveau parent est introuvable.')
+
+    # Include all nested shared spaces, but NEVER touch storage/privates/.
+    affected = list(DriveSpace.objects.filter(pk__in=descendants, private_owner__isnull=True))
+    prefix = old_prefix + '/'
+    for node in affected:
+        if node.pk != space.pk and not node.relative_path.startswith(prefix):
+            raise ValueError('Incohérence entre l’arborescence et le stockage physique.')
+        updated = new_prefix + node.relative_path[len(old_prefix):]
+        if len(updated) > 700:
+            raise ValueError('Hiérarchie trop profonde pour ce déplacement.')
+        node.relative_path = updated
+    # A rollback will restore all of these SQL updates, including the item paths.
+    for node in affected:
+        node.save(update_fields=['relative_path'])
+    space.parent = target
+    # Legacy assigned spaces could implicitly pass permissions to their parent.
+    # Moving them must not silently grant those rights on a DIFFERENT parent.
+    if space.user_id is not None:
+        space.can_view_parent = False
+        space.can_write_parent = False
+        space.can_invite = False
+        space.parent_permissions = None
+        space.save(update_fields=['parent','can_view_parent','can_write_parent','can_invite','parent_permissions'])
+    else:
+        space.save(update_fields=['parent'])
+    # Modern readable-storage keys follow the physical directory; legacy
+    # UUID locations outside this subtree remain untouched.
+    items = DriveItem.objects.filter(space_id__in=[node.pk for node in affected],
+                                   storage_location__startswith=prefix)
+    # Include files stored directly under old_prefix as well.
+    for item in items.iterator(chunk_size=500):
+        item.storage_location = new_prefix + item.storage_location[len(old_prefix):]
+        item.save(update_fields=['storage_location'])
+    source.rename(destination)  # Atomic on this filesystem.
+    return source, destination
+
+
 @api_view(['PATCH','DELETE'])
 def edit_shared_space(request,space_id):
     try:space=DriveSpace.objects.select_related('parent','managed_by').get(pk=space_id)
@@ -404,16 +507,33 @@ def edit_shared_space(request,space_id):
         return error('Modification interdite.',403)
     if request.method == 'DELETE':
         return delete_shared_space(request, space_id)
+    moved = None
     try:
         with transaction.atomic():
-            if 'display_name' in request.data:
-                title=valid_name(request.data['display_name'])
-                if len(title)>120:return error('Nom limité à 120 caractères.')
-                space.display_name=title
-                space.save(update_fields=['display_name'])
+            # Prevent concurrent moves/creation or quota alterations from
+            # observing an incomplete hierarchy.
+            list(DriveSpace.objects.select_for_update().order_by('pk'))
+            space = DriveSpace.objects.select_related('parent','managed_by').get(pk=space_id)
+            if 'parent_space' in request.data:
+                moved = _relocate_shared_space(request.user, space, request.data['parent_space'])
             if 'quota_bytes' in request.data:
                 _update_quota(space,request.data['quota_bytes'])
-    except ValueError as exc:return error(str(exc))
+            if 'display_name' in request.data:
+                title=valid_name(request.data['display_name'])
+                if len(title)>120:raise ValueError('Nom limité à 120 caractères.')
+                space.display_name=title
+                space.save(update_fields=['display_name'])
+    except Exception as exc:
+        if moved is not None:
+            source, destination = moved
+            try:
+                destination.rename(source)
+            except OSError:
+                _logger.exception('ALERTE: impossible de restaurer un espace après un échec SQL: %s', source)
+                return error('Déplacement interrompu : intervention manuelle nécessaire.',500)
+        if isinstance(exc,PermissionError):return error(str(exc),403)
+        if isinstance(exc,(ValueError,OSError)):return error(str(exc),409 if isinstance(exc,OSError) else 400)
+        raise
     return Response(space_info(space,request.user))
 
 
@@ -589,16 +709,22 @@ def admin_user_access(request, user_id):
     if is_admin(target):
         return error('Impossible de modifier les accès d’un administrateur.', 403)
     accesses = []
+    role_spaces = set()
+    for kind, role_filter in [('owner', {'user':target}), ('manager', {'managed_by':target})]:
+        for space in DriveSpace.objects.filter(private_owner__isnull=True, **role_filter):
+            if space.pk in role_spaces:
+                continue
+            role_spaces.add(space.pk)
+            accesses.append({'kind':kind, 'space_id':space.pk,
+                'space_name':space.display_name, 'permissions':[right for right in RIGHTS if right in space_rights(target, space)]})
     for grant in SpaceGrant.objects.filter(user=target, space__private_owner__isnull=True).select_related('space'):
-        accesses.append({'kind':'grant', 'space_id':grant.space_id, 'space_name':grant.space.display_name})
-    for space in DriveSpace.objects.filter(user=target, private_owner__isnull=True):
-        accesses.append({'kind':'owner', 'space_id':space.pk, 'space_name':space.display_name})
-    for space in DriveSpace.objects.filter(managed_by=target, private_owner__isnull=True):
-        accesses.append({'kind':'manager', 'space_id':space.pk, 'space_name':space.display_name})
+        if grant.space_id not in role_spaces:
+            accesses.append({'kind':'grant', 'space_id':grant.space_id,
+                'space_name':grant.space.display_name, 'permissions':[right for right in RIGHTS if right in space_rights(target, grant.space)]})
     return Response({'accesses': accesses})
 
 
-@api_view(['DELETE'])
+@api_view(['DELETE','PATCH'])
 def admin_revoke_user_access(request, user_id, kind, space_id):
     """Revoke a space membership, legacy assignment, or managed-space grant.
 
@@ -618,15 +744,35 @@ def admin_revoke_user_access(request, user_id, kind, space_id):
         if is_admin(target):
             return error('Impossible de modifier les accès d’un administrateur.', 403)
         qs = DriveSpace.objects.select_for_update().filter(pk=space_id, private_owner__isnull=True)
+        if request.method == 'PATCH':
+            space = qs.first()
+            if space is None:
+                return error('Espace introuvable.',404)
+            if kind == 'owner' and space.user_id != target.pk or kind == 'manager' and space.managed_by_id != target.pk:
+                return error('Accès introuvable.',404)
+            if kind == 'grant' and not SpaceGrant.objects.filter(space=space,user=target).exists():
+                return error('Accès introuvable.',404)
+            try:
+                rights = normalized(request.data.get('permissions'))
+            except ValueError as exc:
+                return error(str(exc))
+            grant, _ = SpaceGrant.objects.select_for_update().get_or_create(user=target,space=space)
+            grant.permissions=rights
+            grant.can_write='add' in rights and 'modify' in rights
+            grant.can_invite='manage_access' in rights
+            grant.save(update_fields=['permissions','can_write','can_invite'])
+            return Response({'space_id':space.pk,'permissions':rights})
         if kind == 'grant':
             deleted, _ = SpaceGrant.objects.filter(space__in=qs, user=target).delete()
             if not deleted:return error('Accès introuvable.', 404)
         elif kind == 'owner':
             if not qs.filter(user=target).update(user=None):
                 return error('Accès introuvable.', 404)
+            SpaceGrant.objects.filter(space_id=space_id,user=target).delete()
         else:
             if not qs.filter(managed_by=target).update(managed_by=None):
                 return error('Accès introuvable.', 404)
+            SpaceGrant.objects.filter(space_id=space_id,user=target).delete()
     return Response(status=204)
 
 

frontend/src/api/client.js

@@ -76,6 +76,7 @@ export const drive={
  adminDeleteUser:(id,confirm_username)=>api.delete(`/drive/admin/users/${id}/`,{data:{confirm_username}}),
  adminUserAccess:id=>api.get(`/drive/admin/users/${id}/access/`).then(r=>r.data.accesses),
  revokeUserAccess:(id,kind,spaceId)=>api.delete(`/drive/admin/users/${id}/access/${kind}/${spaceId}/`),
+ updateUserAccess:(id,kind,spaceId,permissions)=>api.patch(`/drive/admin/users/${id}/access/${kind}/${spaceId}/`,{permissions}).then(r=>r.data),
  stats:params=>api.get('/drive/stats/',{params}).then(r=>r.data),
  folder:(name,parent,space)=>api.post('/drive/folders/',{name,parent,space}).then(r=>r.data),
  patch:(id,updates)=>api.patch(`/drive/items/${id}/`,updates).then(r=>r.data),

frontend/src/components/drive/dialogs/SpaceSettingsDialog.jsx

@@ -16,6 +16,8 @@ export default function SpaceSettingsDialog({controller: c}) {
   const [quota,setQuota] = useState('')
   const [parent,setParent] = useState('')
   const [busy,setBusy] = useState(false)
+  const eligibleParents = spaces.filter(space => !space.is_private && space.id !== current?.id && space.permissions?.includes('create_spaces') && !isDescendant(space, current, spaces))
+  const canMove = manage && !!current?.parent_id && eligibleParents.some(space => space.id !== current.parent_id)
   const [localError,setLocalError] = useState('')
   useEffect(() => {
     setName(manage ? current?.display_name || '' : '')
@@ -30,9 +32,11 @@ export default function SpaceSettingsDialog({controller: c}) {
     try {
       if (manage && !current) throw new Error('Sous-espace introuvable. Actualise la page.')
       const data={display_name:name.trim(),quota_bytes:toQuota(quota)}
+      if (manage && canMove && parent && Number(parent) !== current.parent_id) data.parent_space = Number(parent)
       const result=manage ? await drive.editSpace(current.id,data) : await drive.createSpace({...data,parent_space:Number(parent)})
       await loadSpaces()
       if (!manage) switchSpace(result.id)
+      if (manage && data.parent_space) await c.reloadStats()
       setNote(manage ? 'Espace modifié.' : 'Espace créé.')
       setSpaceDialog(null)
     } catch(exception) {setLocalError(exception?.response ? message(exception) : exception.message || message(exception))}
@@ -56,6 +60,14 @@ export default function SpaceSettingsDialog({controller: c}) {
             className="h-10 w-full rounded-md border bg-background px-3 text-sm">
             {managed.map(space=><option key={space.id} value={space.id}>{space.display_name}</option>)}
           </select></div>}
+        {canMove && <div className="space-y-2"><Label htmlFor="space-new-parent">Espace parent</Label>
+          <select id="space-new-parent" value={parent} disabled={busy} onChange={e=>setParent(e.target.value)}
+            className="h-10 w-full rounded-md border bg-background px-3 text-sm">
+            {current?.parent_id && !eligibleParents.some(space => space.id === current.parent_id) &&
+              <option value={current.parent_id}>{spaces.find(space => space.id === current.parent_id)?.display_name || 'Parent actuel'}</option>}
+            {eligibleParents.map(space=><option key={space.id} value={space.id}>{space.display_name}</option>)}
+          </select>
+        </div>}
         <div className="space-y-2"><Label htmlFor="space-name">Nom affiché</Label>
           <Input id="space-name" value={name} onChange={e=>setName(e.target.value)} maxLength={120} required placeholder="Ex. Équipe projet" /></div>
         <QuotaField id="space-quota" value={quota} onChange={setQuota} disabled={busy} />
@@ -68,3 +80,15 @@ export default function SpaceSettingsDialog({controller: c}) {
     </DialogContent>
   </Dialog>
 }
+
+function isDescendant(candidate, ancestor, spaces) {
+  if (!ancestor) return false
+  let current = candidate
+  const visited = new Set()
+  while (current && !visited.has(current.id)) {
+    if (current.id === ancestor.id) return true
+    visited.add(current.id)
+    current = spaces.find(space => space.id === current.parent_id)
+  }
+  return false
+}

frontend/src/hooks/useDriveController.js

@@ -65,9 +65,13 @@ export function useDriveController(user) {
   useEffect(() => { loadSpaces() }, [loadSpaces])
 
   const switchSpace = id => {
-    ++statsSequence.current
-    setStats(null)
-    setActiveSpaceId(id)
+    // Clicking the current space must not erase its statistics. No dependency
+    // changes in that case, so the stats effect would not fetch them again.
+    if (id !== activeSpaceId) {
+      ++statsSequence.current
+      setStats(null)
+      setActiveSpaceId(id)
+    }
     setView('files')
     setParent(null)
     setQuery('')

frontend/src/pages/AdminUsersPage.jsx

@@ -4,6 +4,7 @@ import { Input } from '@/components/ui/input'
 import { Button } from '@/components/ui/button'
 import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog'
 import { drive, message } from '@/api/client'
+import PermissionsEditor from '@/components/drive/PermissionsEditor'
 
 export default function AdminUsersPage(){
   const [query,setQuery] = useState('')
@@ -37,6 +38,14 @@ export default function AdminUsersPage(){
     catch(e){setAccessError(message(e))}
     finally{setAccessBusy(false)}
   }
+  const updateAccess=async (access,permissions)=>{
+    setAccessBusy(true);setAccessError('')
+    try {
+      await drive.updateUserAccess(accessUser.id,access.kind,access.space_id,permissions)
+      setAccesses(await drive.adminUserAccess(accessUser.id));refresh()
+    } catch(e) {setAccessError(message(e))}
+    finally {setAccessBusy(false)}
+  }
   const revokeAccess=async access=>{
     if(!accessUser || !window.confirm(`Retirer l’accès à « ${access.space_name} » pour @${accessUser.username} ?`))return
     setAccessBusy(true);setAccessError('')
@@ -75,17 +84,15 @@ export default function AdminUsersPage(){
       {record.limited && <p className="text-sm text-muted-foreground">200 résultats affichés. Précise la recherche.</p>}
     </div>
     <Dialog open={!!accessUser} onOpenChange={open=>{if(!open&&!accessBusy)setAccessUser(null)}}>
-      <DialogContent className="sm:max-w-lg">
+      <DialogContent className="sm:max-w-xl">
         <DialogHeader><DialogTitle>Accès de @{accessUser?.username}</DialogTitle>
-          <DialogDescription>Retirer l’accès à un espace partagé sans supprimer cet espace.</DialogDescription>
+          <DialogDescription>Modifier les droits ou retirer l’accès à un espace.</DialogDescription>
         </DialogHeader>
         {accessError && <p role="alert" className="text-sm text-destructive">{accessError}</p>}
         {accessBusy && <LoaderCircle className="size-5 animate-spin"/>}
         <div className="max-h-80 space-y-2 overflow-y-auto">
-          {accesses.map(access=><div key={`${access.kind}-${access.space_id}`} className="flex items-center justify-between gap-2 rounded-lg border p-3">
-            <div className="min-w-0"><div className="truncate text-sm font-medium">{access.space_name}</div><div className="text-xs text-muted-foreground">{access.kind==='grant'?'Accès attribué':access.kind==='owner'?'Espace attribué':'Gestionnaire'}</div></div>
-            <Button type="button" size="sm" variant="outline" className="shrink-0 text-destructive" disabled={accessBusy} onClick={()=>revokeAccess(access)}><Trash2 className="size-4"/> Retirer</Button>
-          </div>)}
+          {accesses.map(access=><AccessPermissionsRow key={`${access.kind}-${access.space_id}`}
+            access={access} busy={accessBusy} save={permissions=>updateAccess(access,permissions)} revoke={()=>revokeAccess(access)}/>)}
           {!accessBusy && !accesses.length && <p className="text-sm text-muted-foreground">Aucun accès à un espace partagé.</p>}
         </div>
       </DialogContent>
@@ -108,3 +115,18 @@ export default function AdminUsersPage(){
     </Dialog>
   </div>
 }
+
+function AccessPermissionsRow({access,busy,save,revoke}) {
+  const [permissions,setPermissions] = useState(access.permissions || ['view','download'])
+  useEffect(()=>setPermissions(access.permissions || ['view','download']),[access.permissions])
+  return <div className="space-y-3 rounded-xl border p-3">
+    <div className="flex items-center justify-between gap-2">
+      <div className="min-w-0"><div className="truncate text-sm font-semibold">{access.space_name}</div>
+        <div className="text-xs text-muted-foreground">{access.kind==='grant'?'Accès direct':access.kind==='owner'?'Espace attribué':'Gestionnaire'}</div>
+      </div>
+      <Button type="button" size="icon-sm" variant="ghost" className="text-destructive" disabled={busy} title="Révoquer l’accès" onClick={revoke}><Trash2 className="size-4"/></Button>
+    </div>
+    <PermissionsEditor value={permissions} onChange={setPermissions} compact />
+    <Button type="button" size="sm" variant="outline" disabled={busy || permissions.join(',') === (access.permissions || []).join(',')} onClick={()=>save(permissions)}>Enregistrer les permissions</Button>
+  </div>
+}