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 _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 snap(self, user):
if self.invalid is not None:
raise s_exc.NoSuchLayer(iden=self.invalid)
return await self.snapctor(self, user)