async def setLayers(self, layers):
'''
Set the view layers from a list of idens.
NOTE: view layers are stored "top down" (the write layer is self.layers[0])
'''
for view in self.core.views.values():
if view.parent is self:
raise s_exc.ReadOnlyLayer(
mesg='May not change layers that have been forked from')
if self.parent is not None:
raise s_exc.ReadOnlyLayer(
mesg='May not change layers of forked view')
layrs = []
for iden in layers:
layr = self.core.layers.get(iden)
if layr is None:
raise s_exc.NoSuchLayer(iden=iden)
if not layrs and layr.readonly:
raise s_exc.ReadOnlyLayer(
mesg=f'First layer {layr.iden} must not be read-only')
layrs.append(layr)
self.invalid = None
self.layers = layrs
await self.info.set('layers', layers)
async def mergeAllowed(self, user=None):
'''
Check whether a user can merge a view into its parent.
'''
fromlayr = self.layers[0]
if self.parent is None:
raise s_exc.CantMergeView(mesg=f'Cannot merge a view {self.iden} than has not been forked')
parentlayr = self.parent.layers[0]
if parentlayr.readonly:
raise s_exc.ReadOnlyLayer(mesg="May not merge if the parent's write layer is read-only")
for view in self.core.views.values():
if view.parent == self:
raise s_exc.CantMergeView(mesg='Cannot merge a view that has children itself')
if user is None or user.isAdmin() or user.isAdmin(gateiden=parentlayr.iden):
return
async with await self.parent.snap(user=user) as snap:
splicecount = 0
async for nodeedit in fromlayr.iterLayerNodeEdits():
async for offs, splice in fromlayr.makeSplices(0, [nodeedit], None):
check = self.permCheck.get(splice[0])
if check is None:
raise s_exc.SynErr(mesg='Unknown splice type, cannot safely merge',
splicetype=splice[0])
await check(user, snap, splice[1])
splicecount += 1
if splicecount % 1000 == 0:
await asyncio.sleep(0)
async def _addLayer(self, layriden, indx=None):
for view in self.core.views.values():
if view.parent is self:
raise s_exc.ReadOnlyLayer(mesg='May not change layers that have been forked from')
if self.parent is not None:
raise s_exc.ReadOnlyLayer(mesg='May not change layers of forked view')
layr = self.core.layers.get(layriden)
if layr is None:
raise s_exc.NoSuchLayer(iden=layriden)
if layr in self.layers:
return
if indx is None:
self.layers.append(layr)
else:
self.layers.insert(indx, layr)
await self.info.set('layers', [lyr.iden for lyr in self.layers])
async def stor(self, sops, splices=None):
raise s_exc.ReadOnlyLayer(mesg='Remote layer does not support writing')
