Send Text Message

//native

/**

 * Send Text Message

 * Send a text message to a WhatsApp user. Free-form messages can only be sent within 24 hours of the user's last message; otherwise use a template.

 */

export async function main(

  auth: RT.WhatsappBusiness,

  to: string,

  text: string,

  preview_url: boolean | undefined

) {

  const apiVersion = auth.api_version || "v25.0"

  const url = new URL(

    `https://graph.facebook.com/${apiVersion}/${auth.phone_number_id}/messages`

  )

  const response = await fetch(url, {

    method: "POST",

    headers: {

      Authorization: `Bearer ${auth.token}`,

      "Content-Type": "application/json",

      Accept: "application/json",

    },

    body: JSON.stringify({

      messaging_product: "whatsapp",

      recipient_type: "individual",

      to,

      type: "text",

      text: {

        body: text,

        preview_url: preview_url ?? false,

      },

    }),

  })

  if (!response.ok) {

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

  }

  return await response.json()

}