index.php

<?php
/**
 * Created by PhpStorm.
 * User: david
 * Date: 24.07.2018
 * Time: 12:22
 */


namespace Net\Schmithuesen {

    use Exception;
    use Sabre\VObject\Reader;

    require_once __DIR__ . '/vendor/autoload.php';

    /**
     * @param $body
     *
     * @return string
     */
    function getFullHTML($body): string
    {
        return getHTMLHead() . $body . getHTMLFooter();
    }

    /**
     * @param string[] $urls
     * @return bool[]
     */
    function validateIcsLinks(array $urls): array
    {
        $ret = [];
        foreach ($urls as $url) {
            try {

                $data = @file_get_contents($url);
                if ($data === false) {
                    $ret[$url] = false;
                    continue;
                }

                $cal = Reader::read($data, Reader::OPTION_FORGIVING);
                // Prüfen, ob es sich um eine VCALENDAR-Komponente handelt
                $ret[$url] = $cal->name === 'VCALENDAR';
            } catch (Exception) {
                $ret[$url] = false;
            }
        }
        return $ret;
    }

    $task = $_REQUEST["task"] ?? null;
    if (!file_exists(__DIR__ . '/database.sqlite')) {
        $task = "create";
    }
    switch ($task) {
        case "createDB":
            if (file_exists(__DIR__ . '/database.sqlite')) {
                echo "Database already exists";
                die;
            }
            $db = new Database();
            try {
                $db->create();
                header("Location: index.php");
            } catch (Exception) {
                echo getFullHTML("<h1>Create DB</h1> <pre> Could not create database. </pre>");
                die;
            }
            break;
        case "store":
            $icsLinks = array_filter($_REQUEST[LinkAdministrationView::PRIVATE_ICS_LINK] ?? []);
            $validateResults = validateIcsLinks($icsLinks);
            if (!in_array(false, $validateResults) && !empty($_REQUEST[LinkAdministrationView::EMAIL_FIELD])) {
                $db = new Database();
                $publicICS = $db->store($icsLinks,
                    $_REQUEST[LinkAdministrationView::EMAIL_FIELD]);
                $view = new ResultView($publicICS);
                echo getFullHTML(
                    $view);
            } else {
                $errorMsg = "";
                if (empty($_REQUEST[LinkAdministrationView::EMAIL_FIELD]))
                    $errorMsg .= "<p>Error: The email field is required.</p>\n";
                foreach ($validateResults as $url => $valid) {
                    if (!$valid) {
                        $errorMsg .= "<p> ICS link <strong>" . htmlspecialchars($url) . "</strong> is not valid</p>\n";
                    }
                }
                echo getFullHTML(new ErrorView($errorMsg));
            }

            break;
        case "getPublicIcsFeed":
            if (!isset($_REQUEST["secret"])) {
                echo getFullHTML(new ErrorView("Wrong URL Format."));
                return;
            }
            $anon = new IcsAnonymizer($_REQUEST["secret"]);
            header('Expires: Thu, 01-Jan-70 00:00:01 GMT');
            header('Cache-Control: no-store, no-cache, must-revalidate');
            header('Pragma: no-cache');
            header('Content-Type: text/calendar;charset=UTF-8');
            echo $anon->getFreeBusyInformation();
            break;
        case "phpinfo":
            //echo phpinfo();
            break;
        case "serverinfo":
            print_r($_SERVER);
            break;
        default:
            $explanationOfTheTool = '
			<p>creates an ics feed from your calendar feed where only the following information is kept:</p>
			<p><ol>
			<li>Start time</li>
			<li>end time</li>
			<li>booking state</li>
			<li>outlook free/busy state</li>
			</ol></p>
			<p>You get a link to the anonymized feed.</p>
';
            $view = new LinkAdministrationView();
            echo getFullHTML($explanationOfTheTool . $view);

    }

    function getBootstrapCode(): string
    {
        return '<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" integrity="sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB" crossorigin="anonymous">
	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js" integrity="sha384-smHYKdLADwkXOn1EmN1qk/HfnUcbVRZyYmZ4qpPea6sjB/pTJ0euyQp0Mk8ck+5T" crossorigin="anonymous"></script>';
    }

    function getHTMLHead(): string
    {
        return '<!DOCTYPE HTML> <html lang="de">
   <head>' . getBootstrapCode() . '
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div class="container">
	<div class="row">
		<div class="col-sm-12">
			<h1>ics anonymizer</h1>
';
    }

    function getHTMLFooter(): string
    {
        return "
		</div>
	</div>	
</div>
</body>
</html>";
    }
}