async def _getPropDelEdits(self, name, init=False):
prop = self.form.prop(name)
if prop is None:
if self.snap.strict:
mesg = f'No property named {name}.'
raise s_exc.NoSuchProp(mesg=mesg,
name=name,
form=self.form.name)
await self.snap.warn(f'No Such Property: {name}')
return ()
if not init:
if prop.info.get('ro'):
if self.snap.strict:
raise s_exc.ReadOnlyProp(name=name)
await self.snap.warn(f'Property is read-only: {name}')
return ()
curv = self.props.get(name, s_common.novalu)
if curv is s_common.novalu:
return ()
edits = ((s_layer.EDIT_PROP_DEL, (prop.name, None, prop.type.stortype),
()), )
return edits
async def pop(self, name, init=False):
'''
Remove a property from a node and return the value
'''
prop = self.form.prop(name)
if prop is None:
if self.snap.strict:
raise s_exc.NoSuchProp(name=name, form=self.form.name)
await self.snap.warn(f'No Such Property: {name}')
return False
if self.form.isrunt:
if prop.info.get('ro'):
raise s_exc.IsRuntForm(
mesg='Cannot delete read-only props on runt nodes',
form=self.form.full,
prop=name)
return await self.snap.core.runRuntPropDel(self, prop)
if not init:
if prop.info.get('ro'):
if self.snap.strict:
raise s_exc.ReadOnlyProp(name=name)
await self.snap.warn(f'Property is read-only: {name}')
return False
curv = self.props.pop(name, s_common.novalu)
if curv is s_common.novalu:
return False
edits = ((s_layer.EDIT_PROP_DEL, (prop.name, None, prop.type.stortype),
()), )
await self.snap.applyNodeEdit((self.buid, self.form.name, edits))
async def pop(self, name, init=False):
'''
Remove a property from a node and return the value
'''
prop = self.form.prop(name)
if prop is None:
if self.snap.strict:
raise s_exc.NoSuchProp(name=name, form=self.form.name)
await self.snap.warn(f'No Such Property: {name}')
return False
if self.isrunt:
if prop.info.get('ro'):
raise s_exc.IsRuntForm(
mesg='Cannot delete read-only props on runt nodes',
form=self.form.full,
prop=name)
return await self.snap.core.runRuntPropDel(self, prop)
if not init:
if prop.info.get('ro'):
if self.snap.strict:
raise s_exc.ReadOnlyProp(name=name)
await self.snap.warn(f'Property is read-only: {name}')
return False
curv = self.props.pop(name, s_common.novalu)
if curv is s_common.novalu:
return False
sops = prop.getDelOps(self.buid)
splice = self.snap.splice('prop:del',
ndef=self.ndef,
prop=prop.name,
valu=curv)
await self.snap.stor(sops, [splice])
await prop.wasDel(self, curv)
async def set(self, name, valu, init=False):
'''
Set a property on the node.
Args:
name (str): The name of the property.
valu (obj): The value of the property.
init (bool): Set to True to disable read-only enforcement
Returns:
(bool): True if the property was changed.
'''
if self.snap.readonly:
mesg = 'Cannot set property in read-only mode.'
raise s_exc.IsReadOnly(mesg=mesg)
prop = self.form.prop(name)
if prop is None:
if self.snap.strict:
mesg = f'No property named {name}.'
raise s_exc.NoSuchProp(mesg=mesg,
name=name,
form=self.form.name)
await self.snap.warn(f'NoSuchProp: name={name}')
return False
if self.form.isrunt:
if prop.info.get('ro'):
mesg = 'Cannot set read-only props on runt nodes'
raise s_exc.IsRuntForm(mesg=mesg,
form=self.form.full,
prop=name,
valu=valu)
await self.snap.core.runRuntPropSet(self, prop, valu)
return True
curv = self.props.get(name)
# normalize the property value...
try:
norm, info = prop.type.norm(valu)
except Exception as e:
mesg = f'Bad property value: {prop.full}={valu!r}'
return await self.snap._raiseOnStrict(s_exc.BadTypeValu,
mesg,
name=prop.name,
valu=valu,
emesg=str(e))
# do we already have the value?
if curv == norm:
return False
await self.snap.core._callPropSetHook(self, prop, norm)
if curv is not None and not init:
if prop.info.get('ro'):
if self.snap.strict:
raise s_exc.ReadOnlyProp(name=prop.full)
# not setting a set-once prop unless we are init...
return False
# check for type specific merging...
norm = prop.type.merge(curv, norm)
if curv == norm:
return False
props = {prop.name: norm}
nodeedits = await self.snap.getNodeAdds(self.form,
self.ndef[1],
props,
addnode=False)
await self.snap.applyNodeEdits(nodeedits)
return True
async def _setops(self, name, valu, editatom, init=False):
'''
Generate operations to set a property on a node.
'''
prop = self.form.prop(name)
if prop is None:
if self.snap.strict:
raise s_exc.NoSuchProp(name=name, form=self.form.name)
await self.snap.warn(f'NoSuchProp: name={name}')
return False
if self.isrunt:
if prop.info.get('ro'):
raise s_exc.IsRuntForm(
mesg='Cannot set read-only props on runt nodes',
form=self.form.full,
prop=name,
valu=valu)
return await self.snap.core.runRuntPropSet(self, prop, valu)
curv = self.props.get(name)
# normalize the property value...
try:
norm, info = prop.type.norm(valu)
except Exception as e:
mesg = f'Bad property value: {prop.full}={valu!r}'
return await self.snap._raiseOnStrict(s_exc.BadPropValu,
mesg,
name=prop.name,
valu=valu,
emesg=str(e))
# do we already have the value?
if curv == norm:
return False
if curv is not None and not init:
if prop.info.get('ro'):
if self.snap.strict:
raise s_exc.ReadOnlyProp(name=prop.full)
# not setting a set-once prop unless we are init...
return False
# check for type specific merging...
norm = prop.type.merge(curv, norm)
if curv == norm:
return False
sops = prop.getSetOps(self.buid, norm)
editatom.sops.extend(sops)
# self.props[prop.name] = norm
editatom.npvs.append((self, prop, curv, norm))
# do we have any auto nodes to add?
auto = self.snap.model.form(prop.type.name)
if auto is not None:
buid = s_common.buid((auto.name, norm))
await self.snap._addNodeFnibOps((auto, norm, info, buid), editatom)
# does the type think we have special auto nodes to add?
# ( used only for adds which do not meet the above block )
for autoname, autovalu in info.get('adds', ()):
auto = self.snap.model.form(autoname)
autonorm, autoinfo = auto.type.norm(autovalu)
buid = s_common.buid((auto.name, autonorm))
await self.snap._addNodeFnibOps((auto, autovalu, autoinfo, buid),
editatom)
# do we need to set any sub props?
subs = info.get('subs')
if subs is not None:
for subname, subvalu in subs.items():
full = prop.name + ':' + subname
subprop = self.form.prop(full)
if subprop is None:
continue
await self._setops(full, subvalu, editatom, init=init)
return True
