<?php

/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

use GeoIp2\Database\Reader;

// Override with a valid public IP when testing on localhost
//$_SERVER['REMOTE_ADDR'] = "206.127.96.82";

try {

    require_once __DIR__ . "/requiredpublic.php";

    $time = date("Y-m-d H:i:s");

    /**
     * https://stackoverflow.com/a/2040279
     */
    function gen_uuid() {
        return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
                // 32 bits for "time_low"
                mt_rand(0, 0xffff), mt_rand(0, 0xffff),
                // 16 bits for "time_mid"
                mt_rand(0, 0xffff),
                // 16 bits for "time_hi_and_version",
                // four most significant bits holds version number 4
                mt_rand(0, 0x0fff) | 0x4000,
                // 16 bits, 8 bits for "clk_seq_hi_res",
                // 8 bits for "clk_seq_low",
                // two most significant bits holds zero and one for variant DCE1.1
                mt_rand(0, 0x3fff) | 0x8000,
                // 48 bits for "node"
                mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
        );
    }

//
// Read/set the cookie
//

    if (isset($_COOKIE['sw-uuid'])) {
        $uuid = $_COOKIE['sw-uuid'];
    } else {
        $uuid = gen_uuid();
    }

    setcookie("sw-uuid", $uuid, time() + 60 * 60 * 1, "/", $_SERVER['HTTP_HOST'], false, true);

//
// Get the user's IP address
//

    $clientip = $_SERVER['REMOTE_ADDR'];

// Check if we're behind CloudFlare and adjust accordingly
    if (isset($_SERVER["HTTP_CF_CONNECTING_IP"]) && validateCloudflare()) {
        $clientip = $_SERVER["HTTP_CF_CONNECTING_IP"];
    }

//
// Lookup IP address
//

    $reader = new Reader(GEOIP_DB);

    $record = $reader->city($clientip);

    $country = $record->country->name;
    $region = $record->mostSpecificSubdivision->name;
    $city = $record->city->name;
    $countrycode = $record->country->isoCode;
    $regioncode = $record->mostSpecificSubdivision->isoCode;
    $lat = $record->location->latitude;
    $lon = $record->location->longitude;

//
// Save the page visit
//

    $database->insert("analytics", [
        "siteid" => getsiteid(),
        "pageid" => getpageid(),
        "uuid" => $uuid,
        "country" => $country,
        "region" => $region,
        "city" => $city,
        "countrycode" => $countrycode,
        "regioncode" => $regioncode,
        "lat" => $lat,
        "lon" => $lon,
        "time" => $time
    ]);
} catch (GeoIp2\Exception\AddressNotFoundException $e) {
    if (DEBUG) {
        echo "<!-- The client IP was not found in the GeoIP database. -->";
    }
} catch (Exception $e) {
    // Silently fail so the rest of the site still works
}