special-filter.js
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special-filter.js
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	const locreq = require("locreq")(__dirname);
	const assert = require("assert");

	const Collection = locreq("lib/chip-types/collection");

	module.exports = app => {
	class SpecialFilter {
	constructor(params) {
	this.params = params;
	}

	async checkSingleResource(app, collection, resource_id) {
	assert(collection instanceof Collection);

	const documents = await app.Datastore.aggregate(collection.name, [
	{ $match: { sealious_id: resource_id } },
	...this.getFilteringQuery(),
	]);

	return documents.length
	? SpecialFilter.pass()
	: SpecialFilter.nopass(this.getNopassReason());
	}
	}

	SpecialFilter.WithParams = _class => (...params) => new _class(...params);

	SpecialFilter.pass = async () => ({ passed: true });
	SpecialFilter.nopass = async reason => ({ passed: false, reason });

	return SpecialFilter;
	};