and.ts
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and.ts
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	import Bluebird from "bluebird";
	import { And as AndQuery } from "../../datastore/query.js";
	import type { Context, CollectionItem } from "../../main.js";
	import Policy, { ReducingPolicy } from "../../chip-types/policy.js";

	export default class And extends ReducingPolicy {
	static type_name = "and";
	async _getRestrictingQuery(context: Context) {
	const queries = await Bluebird.map(this.policies, (strategy) =>
	strategy.getRestrictingQuery(context)
	);

	const ret = new AndQuery(...queries);
	return ret;
	}

	isItemSensitive(context: Context) {
	return Bluebird.map(this.policies, (strategy) =>
	strategy.isItemSensitive(context)
	).reduce((a, b) => a \|\| b);
	}

	async checkerFunction(
	context: Context,
	item_getter: () => Promise<CollectionItem>
	) {
	const results = await this.checkAllPolicies(context, item_getter);
	const negatives = results.filter((result) => result?.allowed === false);
	if (negatives.length > 0) {
	return Policy.deny(`${negatives.map((n) => n?.reason).join(", ")}`);
	}
	return Policy.allow(
	`${results
	.filter((r) => r !== null)
	.map((r) => r?.reason)
	.join(", ")}`
	);
	}
	}