update-sieve.js

#!/usr/bin/env node
// SPDX-License-Identifier: Apache-2.0

import { readFileSync } from 'fs';

const bearer = process.env.BEARER;

if (!bearer) {
    throw 'No BEARER environment variable.'
}

const cookie = process.env.COOKIE;

if (!cookie) {
    throw 'No COOKIE environment variable.'
}

const accountId = process.env.ACCOUNT;

if (!accountId) {
    throw 'No ACCOUNT environment variable.'
}

console.log('Saving sieve...')
const body = {
    "using": [
        "https://www.fastmail.com/dev/user",
        "https://www.fastmail.com/dev/rules",
        "urn:ietf:params:jmap:core"
    ],
    "methodCalls": [
        [
            "SieveBlocks/set",
            {
                "accountId": accountId,
                "update": {
                    "singleton": {
                        "sieveAtMiddle": readFileSync('main.sieve', 'utf-8')
                    }
                }
            },
            "0"
        ]
    ]
};
const resp = await fetch("https://api.fastmail.com/jmap/api/?u=" + accountId, {
    "headers": {
        "accept": "application/json",
        "authorization": "Bearer " + bearer,
        "content-type": "application/json;charset=UTF-8",
        "cookie": cookie
    },
    "body": JSON.stringify(body),
    "method": "POST"
});
console.log('Done: ' + resp.status)
if (!resp.ok) {
    throw await resp.text()
}