user-referenced-in-field.ts
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user-referenced-in-field.ts
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	import { Policy, Query, Context, QueryTypes } from "../../main";
	import { CollectionItem } from "../../chip-types/collection-item";

	export default class UserReferencedInField extends Policy {
	static type_name = "user-referenced-in-field";
	field_name: string;
	constructor(field_name: string) {
	super(field_name);
	this.field_name = field_name;
	}
	async _getRestrictingQuery(context: Context) {
	if (!context.user_id) return new QueryTypes.DenyAll();
	return Query.fromSingleMatch({
	[this.field_name]: context.user_id,
	});
	}
	async checkerFunction(
	context: Context,
	item_getter: () => Promise<CollectionItem>
	) {
	if (!context.user_id) return Policy.deny("you are not logged in");
	const item = await item_getter();
	if (context.user_id !== item.get(this.field_name))
	return Policy.deny(
	`you are not the user mentioned in field ${this.field_name}`
	);
	return Policy.allow(
	`you are the user mentioned in field ${this.field_name}`
	);
	}
	isItemSensitive = async () => true;
	}