stringify.ts
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stringify.ts
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	import { Readable } from "stream";

	type basic = string \| number \| Readable;
	export type Stringifiable = basic \| basic[] \| Promise<basic> \| Promise<basic[]>;

	export async function stringify(
	value: Stringifiable
	): Promise<string \| Readable> {
	if (typeof value === "string" \|\| value instanceof Readable) {
	return value;
	}
	if (typeof value === "number") {
	return value.toString();
	}
	if (value instanceof Promise) {
	return stringify(await value);
	}
	if (value === null) {
	return "";
	}
	if (typeof value === "object" && value.length) {
	return (await Promise.all(value.map((v) => stringify(v)))).join("\n");
	}
	return "";
	}