ics-php-renderer/php/html-components.php

<?php

$_ERRORS = [];

/**
 * Adds an error to the $_ERROR array to be displayed at the end
 * of a PHP script as HTML dialogs
 * 
 * @param string $message Error message
 */
function showError ($message) {
    if ($message == "") return;

    $message = str_replace("\n", "<br>", $message);
    $message = str_replace(" ", "&nbsp;", $message);

    global $_ERRORS;
    $_ERRORS[] = $message;
}

/**
 * Write text into stderr
 * 
 * @param string $text Text to log
 */
function debug ($text) {
    error_log("\n> $text" . PHP_EOL);
}

/**
 * Echoes HTML code to display all collected error messages
 */
function echoErrorsHtml() {
    global $_ERRORS;

    if (count ($_ERRORS) == 0) return;

    // Dialog frame HTML
    $base_html = '
        <div class="dialog-parent">
            <div class="dialog">
                <div class="dialog-content">
                    <b>Fehler beim Laden der Seite:</b><br>
                    <br>
                    %s
                </div>
                <div class="dialog-buttons">
                    <button onclick="closeDialog(this)">OK</button>
                </div>
            </div>
        </div>
    ';

    $errors_html = "";

    foreach ($_ERRORS as $error) {
        $errors_html .= "{$error}<br>";
    }

    printf ($base_html, $errors_html);
}

/**
 * Shows a dialog box asking for an ICS URL if one
 * was not specified by the user
 */
function echoIcsUrlDialog () {
    global $_GET;

    if (!isset ($_GET["ics_url"]) || $_GET["ics_url"] == "") {
        echo '
            <!-- Dialog to ask user for ICS URL if not specified through GET -->
            <div class="dialog-parent <?php hideMissingIcsDialog(); ?>">
                <div class="dialog">
                    <div class="dialog-content">
                        Es wurde keine ICS URL als GET Parameter &uuml;bergeben.<br>
                        <br>
                        <label>Anzuzeigende ICS URL:</label>
                        <input type="text" form="dialog-form" name="ics_url" />
                    </div>
                    <div class="dialog-buttons">
                        <form id="dialog-form" method="get"></form>
                        <input type="submit" form="dialog-form" value="OK" />
                    </div>
                </div>
            </div>
        ';
    }
}