notifications.php

<?php
/**
 * Notification helper — include after session and user setup.
 * Requires: $user['email'], $isAdmin, h() function.
 */

$_notificationsPath = __DIR__ . '/storage/notifications.json';
$_userNotifications = [];
$_unreadCount = 0;

if (!$isAdmin && !empty($user['email'])) {
    if (is_file($_notificationsPath)) {
        $allNotifs = json_decode(file_get_contents($_notificationsPath), true);
        if (is_array($allNotifs)) {
            foreach ($allNotifs as $n) {
                if (strtolower(trim($n['to_email'] ?? '')) === strtolower(trim($user['email']))) {
                    $_userNotifications[] = $n;
                    if (empty($n['read'])) {
                        $_unreadCount++;
                    }
                }
            }
            // Most recent first
            usort($_userNotifications, function ($a, $b) {
                return strcmp(($b['created_at'] ?? ''), ($a['created_at'] ?? ''));
            });
        }
    }

    // Handle mark-as-read via POST
    if ($_SERVER['REQUEST_METHOD'] === 'POST' && ($_POST['action'] ?? '') === 'mark_notifications_read') {
        $allNotifs = json_decode(file_get_contents($_notificationsPath), true);
        if (is_array($allNotifs)) {
            foreach ($allNotifs as &$n) {
                if (strtolower(trim($n['to_email'] ?? '')) === strtolower(trim($user['email']))) {
                    $n['read'] = true;
                }
            }
            unset($n);
            file_put_contents($_notificationsPath, json_encode($allNotifs, JSON_PRETTY_PRINT), LOCK_EX);
            $_unreadCount = 0;
            // Refresh user notifications
            foreach ($_userNotifications as &$un) {
                $un['read'] = true;
            }
            unset($un);
        }
    }

    // Handle clear all notifications via POST
    if ($_SERVER['REQUEST_METHOD'] === 'POST' && ($_POST['action'] ?? '') === 'clear_notifications') {
        $allNotifs = json_decode(file_get_contents($_notificationsPath), true);
        if (is_array($allNotifs)) {
            $allNotifs = array_values(array_filter($allNotifs, function ($n) use ($user) {
                return strtolower(trim($n['to_email'] ?? '')) !== strtolower(trim($user['email']));
            }));
            file_put_contents($_notificationsPath, json_encode($allNotifs, JSON_PRETTY_PRINT), LOCK_EX);
            $_userNotifications = [];
            $_unreadCount = 0;
        }
    }
}

function render_notification_bell() {
    global $_userNotifications, $_unreadCount, $isAdmin;
    if ($isAdmin) return;

    $typeLabels = [
        'networking' => 'Networking Request',
        'job_application' => 'Job Application',
        'event_registration' => 'Event Registration'
    ];
    ?>
    <div class="notif-wrapper" id="notif-wrapper">
        <button class="notif-bell" type="button" id="notif-bell" aria-label="Notifications">
            <svg viewBox="0 0 24 24" width="22" height="22">
                <path d="M12 22c1.1 0 2-.9 2-2h-4a2 2 0 0 0 2 2Zm6-6V11c0-3.07-1.63-5.64-4.5-6.32V4a1.5 1.5 0 0 0-3 0v.68C7.64 5.36 6 7.92 6 11v5l-2 2v1h16v-1l-2-2Z"/>
            </svg>
            <?php if ($_unreadCount > 0) { ?>
                <span class="notif-badge"><?php echo $_unreadCount; ?></span>
            <?php } ?>
        </button>
        <div class="notif-dropdown" id="notif-dropdown" style="display:none;">
            <div class="notif-dropdown-header">
                <span class="notif-dropdown-title">Notifications</span>
                <div class="notif-header-actions">
                    <?php if ($_unreadCount > 0) { ?>
                        <form method="post" action="" style="display:inline;">
                            <input type="hidden" name="action" value="mark_notifications_read">
                            <button class="notif-mark-read" type="submit">Mark all read</button>
                        </form>
                    <?php } ?>
                    <?php if (!empty($_userNotifications)) { ?>
                        <form method="post" action="" style="display:inline;">
                            <input type="hidden" name="action" value="clear_notifications">
                            <button class="notif-clear-all" type="submit" onclick="return confirm('Clear all notifications?');">Clear all</button>
                        </form>
                    <?php } ?>
                </div>
            </div>
            <div class="notif-dropdown-body">
                <?php if (empty($_userNotifications)) { ?>
                    <div class="notif-empty">No notifications yet.</div>
                <?php } else { ?>
                    <?php foreach ($_userNotifications as $notif) { ?>
                        <?php
                            $nType = $typeLabels[$notif['type'] ?? ''] ?? 'Request';
                            $nDecision = $notif['decision'] ?? '';
                            $nDetail = $notif['detail'] ?? '';
                            $nDate = !empty($notif['created_at']) ? date('M d, Y', strtotime($notif['created_at'])) : '';
                            $nRead = !empty($notif['read']);
                            $decisionClass = $nDecision === 'accepted' ? 'accepted' : 'rejected';
                            $decisionLabel = ucfirst($nDecision);
                        ?>
                        <div class="notif-item <?php echo $nRead ? '' : 'unread'; ?>">
                            <div class="notif-item-icon <?php echo $decisionClass; ?>">
                                <?php if ($nDecision === 'accepted') { ?>
                                    <svg viewBox="0 0 24 24" width="16" height="16"><path d="M9 16.17 4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41L9 16.17Z"/></svg>
                                <?php } else { ?>
                                    <svg viewBox="0 0 24 24" width="16" height="16"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41Z"/></svg>
                                <?php } ?>
                            </div>
                            <div class="notif-item-content">
                                <div class="notif-item-text">
                                    Your <strong><?php echo htmlspecialchars($nType); ?></strong>
                                    <?php if ($nDetail) { ?> for <strong><?php echo htmlspecialchars($nDetail); ?></strong><?php } ?>
                                    was <span class="notif-decision <?php echo $decisionClass; ?>"><?php echo $decisionLabel; ?></span>
                                </div>
                                <?php if ($nDate) { ?>
                                    <div class="notif-item-date"><?php echo $nDate; ?></div>
                                <?php } ?>
                            </div>
                        </div>
                    <?php } ?>
                <?php } ?>
            </div>
        </div>
    </div>
    <?php
}
?>