drizzle-cursor/src/parse.ts

Utils for Drizzle ORM cursor based pagination

import "@total-typescript/ts-reset";

import type { CursorConfig } from "./types";
import {
	decoder as _decoder,
	parser as _parser,
	isValidDateOrDateTimeString,
} from "./utils";

/**
 * parse:
 * takes a cursor and returns a JavaScript object
 * useful to retrive object from the FE client token
 */
export function parse<
	T extends Record<string, unknown> = Record<string, unknown>,
>(
	{ primaryCursor, cursors = [] }: CursorConfig,
	cursor?: string | null,
	decoder = _decoder,
	parser = _parser,
): T | null {
	if (!cursor) {
		return null;
	}

	const keys = [primaryCursor, ...cursors].map((cursor) => cursor.key);
	const data = parser(decoder(cursor)) as T;

	const item = keys.reduce(
		(acc, key) => {
			let value = data[key];
			// Handle Date strings
			if (typeof value === "string" && isValidDateOrDateTimeString(value)) {
				value = new Date(value);
			}
			acc[key] = value;
			return acc;
		},
		{} as Record<string, unknown>,
	);

	return item as T;
}

export default parse;