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not.ts
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import
Policy
from
"../../chip-types/policy.js"
;
import
*
as
Query
from
"../../datastore/query.js"
;
import
type
{
CollectionItem
,
Context
}
from
"../../main.js"
;
export
default
class
Not
extends
Policy
{
static
type_name
=
"not"
;
strategy_to_negate
:
Policy
;
constructor
(
strategy
:
Policy
)
{
super
(
strategy
);
this
.
strategy_to_negate
=
Policy
.
fromDefinition
(
strategy
);
}
async
_getRestrictingQuery
(
context
:
Context
)
{
//assuming "not" can take only one access strategy as a parameter
const
query
=
await
this
.
strategy_to_negate
.
getRestrictingQuery
(
context
);
return
new
Query
.
Not
(
query
);
}
async
isItemSensitive
(
context
:
Context
)
{
return
this
.
strategy_to_negate
.
isItemSensitive
(
context
);
}
async
checkerFunction
(
context
:
Context
,
item_getter
:
()
=>
Promise
<
CollectionItem
>
)
{
const
result
=
await
this
.
strategy_to_negate
.
check
(
context
,
item_getter
);
if
(
result
===
null
)
{
return
null
;
}
if
(
result
.
allowed
)
{
return
Policy
.
deny
(
context
.
app
.
i18n
(
"policy_not_allow"
,
[
result
.
reason
])
);
}
return
Policy
.
allow
(
`it's not true that "
${
result
.
reason
}
"`
);
}
}
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