netwatch/app/modules/locations/edit.php

<?php
/**
 * app/modules/locations/edit.php
 *
 * Standort anlegen/bearbeiten
 */

// =========================
// Kontext bestimmen
// =========================
$locationId = (int)($_GET['id'] ?? 0);
$location = null;

if ($locationId > 0) {
    $location = $sql->single(
        "SELECT * FROM locations WHERE id = ?",
        "i",
        [$locationId]
    );
}

$isEdit = !empty($location);
$pageTitle = $isEdit ? "Standort bearbeiten: " . htmlspecialchars($location['name']) : "Neuer Standort";

?>

<div class="location-edit">
    <h1><?php echo $pageTitle; ?></h1>

    <form method="post" action="?module=locations&action=save" class="edit-form">

        <?php if ($isEdit): ?>
        <input type="hidden" name="id" value="<?php echo $locationId; ?>">
        <?php endif; ?>

        <!-- =========================
             Basisdaten
             ========================= -->
        <fieldset>
            <legend>Allgemein</legend>

            <div class="form-group">
                <label for="name">Name <span class="required">*</span></label>
                <input type="text" id="name" name="name" required
                    value="<?php echo htmlspecialchars($location['name'] ?? '); ?>"
                    placeholder="z.B. Hauptgebäude, Campus A, Außenstelle Berlin">
            </div>

            <div class="form-group">
                <label for="comment">Beschreibung</label>
                <textarea id="comment" name="comment" rows="3"
                    placeholder="Adresse, Kontaktinformationen, Besonderheiten"><?php echo htmlspecialchars($location['comment'] ?? '); ?></textarea>
            </div>
        </fieldset>

        <!-- =========================
             Aktionen
             ========================= -->
        <fieldset class="form-actions">
            <button type="submit" class="button button-primary">Speichern</button>
            <a href="?module=locations&action=list" class="button">Abbrechen</a>
            <?php if ($isEdit): ?>
                <a href="#" class="button button-danger" onclick="confirmDelete(<?php echo $locationId; ?>)">Löschen</a>
            <?php endif; ?>
        </fieldset>

    </form>
</div>

<style>
.location-edit {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
}

.edit-form {
    background: white;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
}

.edit-form fieldset {
    margin: 20px 0;
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
}

.edit-form legend {
    padding: 0 10px;
    font-weight: bold;
    font-size: 1.1em;
}

.form-group {
    margin: 15px 0;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
}

.required {
    color: red;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 30px;
}

.button {
    padding: 10px 15px;
    background: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 0.95em;
}

.button-primary {
    background: #28a745;
}

.button-danger {
    background: #dc3545;
}

.button:hover {
    opacity: 0.8;
}
</style>

<script>
function confirmDelete(id) {
    if (confirm('Diesen Standort wirklich loeschen? Alle Gebaeude werden geloescht.')) {
        fetch('?module=locations&action=delete', {
            method: 'POST',
            headers: { 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8' },
            body: 'id=' + encodeURIComponent(id)
        })
            .then((res) => res.json())
            .then((data) => {
                if (data && data.success) {
                    window.location.href = '?module=locations&action=list';
                    return;
                }
                alert((data && data.message) ? data.message : 'Loeschen fehlgeschlagen');
            })
            .catch(() => {
                alert('Loeschen fehlgeschlagen');
            });
    }
}
</script>