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if.ts
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if.ts
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import {
Policies,
App,
Policy,
SpecialFilter,
Context,
CollectionItem,
Queries,
} from "../../main.js";
import type { PolicyDefinition } from "../../chip-types/policy.js";
export default class If extends Policy {
static type_name = "if";
collection_name: string;
filter_name: string;
strategy_when: { [key in "true" | "false"]: Policy };
constructor(
collection_name: string,
special_filter_name: string,
when_true: PolicyDefinition,
when_false: PolicyDefinition = Policies.Noone
) {
super([collection_name, special_filter_name, when_true, when_false]);
this.filter_name = special_filter_name;
this.collection_name = collection_name;
this.strategy_when = {
true: Policy.fromDefinition(when_true),
false: Policy.fromDefinition(when_false),
};
}
getFilter(app: App): SpecialFilter {
return app.collections[this.collection_name].getNamedFilter(
this.filter_name
);
}
async constructQuery(context: Context) {
const filtering_query = await this.getFilter(
context.app
).getFilteringQuery();
return new Queries.Or(
new Queries.And(
filtering_query,
await this.strategy_when.true.getRestrictingQuery(context)
),
new Queries.And(
new Queries.Not(filtering_query),
await this.strategy_when.false.getRestrictingQuery(context)
)
);
}
async _getRestrictingQuery(context: Context) {
return this.constructQuery(context);
}
async checkerFunction(
context: Context,
item_getter: () => Promise<CollectionItem>
) {
const item = await item_getter();
const query = await this.constructQuery(context);
query.match({ id: item.id });
const results = await context.app.Datastore.aggregate(
item.collection.name,
query.toPipeline()
);
if (!results.length) {
return Policy.deny(this.getFilter(context.app).getNopassReason());
}
return Policy.allow(
context.app.i18n("policy_if_allow", [this.filter_name])
);
}
isItemSensitive = async () => true;
}

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