Retrieves purchase orders

//native

type Xero = {

	token: string

}

/**

 * Retrieves purchase orders

 *

 */

export async function main(

	auth: Xero,

	Status: 'DRAFT' | 'SUBMITTED' | 'AUTHORISED' | 'BILLED' | 'DELETED' | undefined,

	DateFrom: string | undefined,

	DateTo: string | undefined,

	order: string | undefined,

	page: string | undefined,

	pageSize: string | undefined,

	xero_tenant_id: string,

	If_Modified_Since: string

) {

	const url = new URL(`https://api.xero.com/api.xro/2.0/PurchaseOrders`)

	for (const [k, v] of [

		['Status', Status],

		['DateFrom', DateFrom],

		['DateTo', DateTo],

		['order', order],

		['page', page],

		['pageSize', pageSize]

	]) {

		if (v !== undefined && v !== '' && k !== undefined) {

			url.searchParams.append(k, v)

		}

	}

	const response = await fetch(url, {

		method: 'GET',

		headers: {

			Accept: 'application/json',

			'xero-tenant-id': xero_tenant_id,

			'If-Modified-Since': If_Modified_Since,

			Authorization: 'Bearer ' + auth.token

		},

		body: undefined

	})

	if (!response.ok) {

		const text = await response.text()

		throw new Error(`${response.status} ${text}`)

	}

	return await response.json()

}