Passing applications to Personio

//native

type Personio = {

	clientId: string

	clientSecret: string

}

type Base64 = string

/**

 * Passing applications to Personio

 *  DEPRECATED: This method of passing application to Personio is deprecated and will only receive bugfixes.

 */

export async function main(

	auth: Personio,

	X_Company_ID: string,

	body: {

		company_id: number

		access_token: string

		job_position_id: number

		first_name: string

		last_name: string

		email: string

		gender?: 'undefined' | 'male' | 'female' | 'diverse'

		recruiting_channel_id?: number

		external_posting_id?: string

		phone?: string

		location?: string

		salary_expectations?: string

		available_from?: string

		'categorised_documents[n][file]'?: {

			base64: Base64

			type:

				| 'image/png'

				| 'image/jpeg'

				| 'image/gif'

				| 'application/pdf'

				| 'appication/json'

				| 'text/csv'

				| 'text/plain'

				| 'audio/mpeg'

				| 'audio/wav'

				| 'video/mp4'

			name: string

		}

		'categorised_documents[n][category]'?: string

		'documents[n]'?: {

			base64: Base64

			type:

				| 'image/png'

				| 'image/jpeg'

				| 'image/gif'

				| 'application/pdf'

				| 'appication/json'

				| 'text/csv'

				| 'text/plain'

				| 'audio/mpeg'

				| 'audio/wav'

				| 'video/mp4'

			name: string

		}

		'document{n}'?: { file?: string }

		message?: string

		tags?: {}

		birthday?: string

		'custom_attribute_{id}'?: number

	},

	X_Personio_Partner_ID?: string,

	X_Personio_App_ID?: string

) {

	const url = new URL(`https://api.personio.de/recruiting/applicant`)

	const formData = new FormData()

	for (const [k, v] of Object.entries(body)) {

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

			if (['categorised_documents[n][file]', 'documents[n]'].includes(k)) {

				const { base64, type, name } = v as {

					base64: Base64

					type: string

					name: string

				}

				formData.append(

					k,

					new Blob([Uint8Array.from(atob(base64), (m) => m.codePointAt(0)!)], {

						type

					}),

					name

				)

			} else {

				formData.append(k, String(v))

			}

		}

	}

	const response = await fetch(url, {

		method: 'POST',

		headers: {

			...(X_Personio_Partner_ID ? { 'X-Personio-Partner-ID': X_Personio_Partner_ID } : {}),

			...(X_Personio_App_ID ? { 'X-Personio-App-ID': X_Personio_App_ID } : {}),

			'X-Company-ID': X_Company_ID,

			Authorization: 'Bearer ' + (await getOAuthToken(auth, 'https://api.personio.de/oauth2/token'))

		},

		body: formData

	})

	if (!response.ok) {

		const text = await response.text()

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

	}

	return await response.json()

}

async function getOAuthToken(auth: Personio, tokenUrl: string): Promise<string> {

	const params = new URLSearchParams({

		grant_type: 'client_credentials',

		client_id: auth.clientId,

		client_secret: auth.clientSecret

	})

	const response = await fetch(tokenUrl, {

		method: 'POST',

		headers: {

			Authorization: 'Basic ' + btoa(`${auth.clientId}:${auth.clientSecret}`),

			'Content-Type': 'application/x-www-form-urlencoded'

		},

		body: params.toString()

	})

	if (!response.ok) {

		const text = await response.text()

		throw new Error(`OAuth token request failed: ${response.status} ${text}`)

	}

	const data = await response.json()

	return data.access_token

}