pointing.php

<?php
/*
 * Copyright (c) 2016-2022 ega, NOT/ING.
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version. See LICENSE.md.
 */
$telescope = $_GET["telescope"];

function get_NOT_pointing() {
    ini_set("include_path", "/home/www/html/include");
    include("access_control.inc.php");
    if (!access_allowed("SKYCAM")) {
        die("Access denied");
    }
    $s = file_get_contents("/tmp/tcs.json");
    $tcs = json_decode($s, true);
    return json_encode(array(
        "alt" => floatval($tcs["AltitudePosDeg"]),
        "az" => -180.0 + floatval($tcs["AzimuthPosDeg"])
    ));
}

function get_WHT_pointing() {
    $s = file_get_contents("http://egapc.ing.iac.es/ega/pointing.php");
    return $s;
}

function get_INT_pointing() {
    return json_encode(array(
        "alt" => null,
        "az" => null
    ));
}

function get_HJST_pointing() {
    return json_encode(array(
        "alt" => null,
        "az" => null
    ));
}

function get_OST_pointing() {
    return json_encode(array(
        "alt" => null,
        "az" => null
    ));
}

try {
    $pointing = call_user_func("get_${telescope}_pointing");
    header("Content-Type: application/json");
    echo $pointing;
} catch (\Throwable $e) {
    die($e->getMessage());
}