Check for appointments on the NY State vaccination website. https://am-i-eligible.covid19vaccine.health.ny.gov/Public/providers

vaccine-finder.js

/*
 * This script will automatically play a sound and trigger an alert when it finds available appointments
 * on the New York State vaccine finder website. https://am-i-eligible.covid19vaccine.health.ny.gov/Public/providers
 * It can be run by pasting it into the Chrome console at the above URL.
 *
 * NOTE: You must meet certain eligibility criteria to qualify for a vaccine.
 */

// Map of all providers - use to populate `providersToCheck` field.
const Providers = {
    // Open to all eligible.
    SUNYAlbany: 1003,
    SUNYBinghamton: 1009,
    SUNYCorningCommunityCollege: 1025,
    SUNYOldWestBury: 1029,
    SUNYOneonta: 1030,
    SUNYOrange: 1031,
    SUNYPolytechnicInstitute: 1010,
    SUNYPotsdam: 1006,
    SUNYRocklandCommunityCollege: 1035,
    SUNYStonyBrook: 1005,
    
    AqueductRacetrack: 1007,
    BronxBayEdenSeniorCenter: 1024,
    ConferenceCenterNiagaraFalls: 1026,
    JavitsCenter: [1000, 1019],
    JonesBeachField3: 1001,
    PlattsburghInternationalAirport: 1008,
    QueensburyAviationMallSears: [1027, 1034],
    RochesterDomeArena: 1012,
    StateFairExpoCenter: [1002, 1020],
    StonyBrookSouthampton: 1032,
    SuffolkCCCBrentwood: 1028,
    UlsterFairgroundsInNewPaltz: 1033,
    UniversityAtBuffaloSouthCampus: 1011,
    WestchesterCountyCenter: 1004,
    
    // Restricted by location! When filtering by these, you have to
    // enter the "address" field in the payload, otherwise it doesn't
    // know it should offer you these options.
    RESTRICTED_AlbanySchenectadyTroy_WashingtonAvenueArmory: 1016,
    RESTRICTED_Brooklyn_MedgarEversCollege: 1014,
    RESTRICTED_Buffalo_DelavanGriderCommunityCenter: 1018,
    RESTRICTED_Queens_YorkCollegeHealthAndPhysicalEducationComplex: 1013,
    RESTRICTED_Rochester_FormerKodakHawkeyeParklingLot: 1017,
    RESTRICTED_YonkerMountVernon_NewYorkNationalGuardArmory: 1015,
};

const APPOINTMENT_STATUS = {
    NotAvailable: "NAC", // None Available Currently
    Available: "AA", // Appointments Available
};

/* 
 * Plays a sound and fires an alert with the provided text.
 * @param {string} text - the text to show in the alert.
 * @param {string} [audioFile] - the path to the audio file to play. Defaults to an annoying "beep" sound.
 */
function alertWithSound(
    text,
    audioFile = "https://media.geeksforgeeks.org/wp-content/uploads/20190531135120/beep.mp3", // Found this online.
) {
    const alertSound = new Audio(audioFile);
        
    // Alert when the sound ends (so that the alert doesn't block the sound).
    alertSound.addEventListener("ended", () => alert(text));
    alertSound.play();
}

/* 
 * Recursively flattens the provided array.
 * e.g. [1, [2, [3]], 4] => [1, 2, 3, 4]
 * @param {array} arr - the array to flatten.
 * @returns {array} [flattenedArr] - the fully flattened array.
 */
function flatten(arr) {
    return arr.reduce((acc, curr) => [
        ...acc,
        ...(Array.isArray(curr) ? flatten(curr) : [curr])
    ], []);
}

/* 
 * Returns the current date-time as a formatted string.
 * @returns {string}
 */
function getCurrentDateTime() {
    const currentDate = new Date();
    const dateTimeString = `${currentDate.toDateString()} ${currentDate.toTimeString().slice(0, 8)}`;
    return dateTimeString;
}

/* 
 * Makes a network request to the provider search API, and returns JSON results.
 * @param {object} payload - the JSON payload to pass the API.
 * @returns {Promise}
 */
async function findLocationsWithAppts(payload) {
    return (await fetch("https://am-i-eligible.covid19vaccine.health.ny.gov/api/get-providers", {
      "headers": {
        "accept": "application/json, text/plain, */*",
        "accept-language": "en-US,en;q=0.9",
        "content-type": "application/json;charset=UTF-8",
        "sec-ch-ua": "\"Chromium\";v=\"88\", \"Google Chrome\";v=\"88\", \";Not A Brand\";v=\"99\"",
        "sec-ch-ua-mobile": "?0",
        "sec-fetch-dest": "empty",
        "sec-fetch-mode": "cors",
        "sec-fetch-site": "same-origin",
        "token": "disabled"
      },
      "referrer": "https://am-i-eligible.covid19vaccine.health.ny.gov/Public/providers",
      "referrerPolicy": "strict-origin-when-cross-origin",
      "body": JSON.stringify(payload),
      "method": "POST",
      "mode": "cors",
      "credentials": "include"
    })).json();
}

/* 
 * Alerts when available appointments are found matching the given parameters.
 * @param {object} payload - the JSON payload to pass the API.
 * @param {object} [options] - configuration options for the alert behavior.
 */
async function alertOnFoundAppointments(payload = {}, options = {}) {
    const { interval, playSound } = options;
    const providersToCheck = options.providersToCheck ? flatten(options.providersToCheck) : null;
    const allLocations = await findLocationsWithAppts(payload);
    const approvedLocations = allLocations
        .filter(({ providerId }) => !providersToCheck || providersToCheck.includes(providerId));
    const approvedLocationsWithAppointments = approvedLocations
        .filter(({ availableAppointments }) => availableAppointments === APPOINTMENT_STATUS.Available);
    
    // Alert out success.
    const [locationWithAppts] = approvedLocationsWithAppointments;
    if (locationWithAppts) {
        const numLocationsWithAppts = approvedLocationsWithAppointments.length;
        const successText = numLocationsWithAppts > 1 
            ? `${locationWithAppts.providerName} and ${numLocationsWithAppts - 1} others have appointments!`
            : `${locationWithAppts.providerName} has appointments!`;
        
        const dateTimeString = getCurrentDateTime();
        console.log(`${dateTimeString}: ${successText}`);
        playSound ? alertWithSound(successText) : alert(successText);
        return;
    } else {
        // Print out failure.
        const dateTimeString = getCurrentDateTime();
        const failureText = `${dateTimeString}: No appointments found at ${approvedLocations.length} of ${allLocations.length} locations.`;
        console.log(failureText);
    }

    // Check again.
    if (interval) {
        setTimeout(
            () => alertOnFoundAppointments(payload, options),
            interval
        );
    }
}

// ApplicationId was retrieved by sniffing an API call, but 
// seems to be optional along with the rest of this data.
// UNLESS you are filtering by a restricted location, in which 
// case you need to enter an eligible ZIP code for the address.
const payload = {
    applicationId: "your-application-id",
    address: "your-zip-code",
    dob: "mm/dd/yyyy",
    miles: "100",
};

// Configuration options.
const options = {
    // How often to check, in MS. 
    // Defaults to not rechecking.
    interval: 10 * 1000, // 10s

    // Array of provider ids we care about checking. 
    // Defaults to check all when falsy.
    providersToCheck: null, // or, e.g. [Providers.JavitsCenter]

    // Whether to play an annoying sound when an appointment is found.
    // Defaults to false.
    playSound: true,
};

// Start checking.
alertOnFoundAppointments(payload, options);