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Editing:gallery.php

<?php
/**
 * ARCHI-TECH Admin Gallery CRUD Manager
 */
require_once __DIR__ . '/../includes/db.php';
require_once __DIR__ . '/../includes/functions.php';

check_admin_auth();

$success_msg = '';
$error_msg = '';

// Success notice alerts
if (isset($_GET['success'])) {
    if ($_GET['success'] === 'added') $success_msg = "New image successfully loaded to gallery.";
    if ($_GET['success'] === 'deleted') $success_msg = "Image successfully deleted.";
}

// Delete image from gallery
if (isset($_GET['delete'])) {
    $delete_id = intval($_GET['delete']);
    try {
        $stmt_path = $pdo->prepare("SELECT image_path FROM gallery WHERE id = :id");
        $stmt_path->execute(['id' => $delete_id]);
        $img = $stmt_path->fetch();
        
        if ($img) {
            if (file_exists(__DIR__ . '/../' . $img['image_path'])) {
                @unlink(__DIR__ . '/../' . $img['image_path']);
            }
            $stmt = $pdo->prepare("DELETE FROM gallery WHERE id = :id");
            $stmt->execute(['id' => $delete_id]);
        }
        header("Location: " . BASE_URL . "admin/gallery.php?success=deleted");
        exit();
    } catch (PDOException $e) {
        $error_msg = "Failed to delete image: " . $e->getMessage();
    }
}

// Upload new gallery image
if (isset($_POST['submit_gallery'])) {
    $title = trim($_POST['title']);
    $category = trim($_POST['category']);
    
    if (empty($title) || empty($category) || !isset($_FILES['image']) || $_FILES['image']['error'] !== UPLOAD_ERR_OK) {
        $error_msg = "All fields and a valid image file are required.";
    } else {
        $allowed = ['image/jpeg', 'image/png', 'image/webp', 'image/jpg'];
        if (!in_array($_FILES['image']['type'], $allowed)) {
            $error_msg = "Only JPG, PNG and WebP files are allowed.";
        } else {
            try {
                $ext = pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION);
                $filename = 'gal_' . bin2hex(random_bytes(8)) . '.' . $ext;
                $destination = PROJECT_UPLOAD_DIR . $filename;
                
                if (move_uploaded_file($_FILES['image']['tmp_name'], $destination)) {
                    $db_path = 'uploads/projects/' . $filename;
                    $stmt = $pdo->prepare("INSERT INTO gallery (title, category, image_path) VALUES (:title, :category, :image_path)");
                    $stmt->execute([
                        'title' => $title,
                        'category' => $category,
                        'image_path' => $db_path
                    ]);
                    header("Location: " . BASE_URL . "admin/gallery.php?success=added");
                    exit();
                } else {
                    $error_msg = "Failed to save file to uploads folder.";
                }
            } catch (PDOException $e) {
                $error_msg = "Database error: " . $e->getMessage();
            }
        }
    }
}

// Fetch all gallery items
$items = [];
try {
    $stmt = $pdo->query("SELECT * FROM gallery ORDER BY id DESC");
    $items = $stmt->fetchAll();
} catch (PDOException $e) {
    // offline
}

require_once __DIR__ . '/header.php';
require_once __DIR__ . '/navbar.php';
?>

<div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-4 border-bottom border-secondary">
    <h1 class="h2 text-white text-uppercase" style="letter-spacing: -0.01em; font-family: 'Syne', sans-serif;">Photo Gallery Manager</h1>
</div>

<?php if (!empty($success_msg)): ?>
    <div class="alert alert-success border-0 bg-success text-white mb-4">
        <i class="bi bi-check-circle-fill me-2"></i><?= sanitize_input($success_msg) ?>
    </div>
<?php endif; ?>
<?php if (!empty($error_msg)): ?>
    <div class="alert alert-danger border-0 bg-danger text-white mb-4">
        <i class="bi bi-exclamation-triangle-fill me-2"></i><?= sanitize_input($error_msg) ?>
    </div>
<?php endif; ?>

<div class="row g-4">
    
    <div class="col-lg-4">
        <div class="glass-card">
            <h3 class="h5 text-white text-uppercase mb-4" style="letter-spacing: 0.05em;"><i class="bi bi-cloud-upload text-accent-color me-2"></i>Upload Photo</h3>
            <form action="<?= BASE_URL ?>admin/gallery.php" method="POST" enctype="multipart/form-data">
                <div class="mb-3">
                    <label for="title" class="form-label text-uppercase small text-muted fw-bold">Photo Title</label>
                    <input type="text" class="form-control form-dark-control" id="title" name="title" required placeholder="eg: Waterfront Villa Facade">
                </div>
                
                <div class="mb-3">
                    <label for="category" class="form-label text-uppercase small text-muted fw-bold">Category</label>
                    <select class="form-select form-dark-control" id="category" name="category" required>
                        <option value="">-- Select Category --</option>
                        <option value="Architecture">Architecture</option>
                        <option value="Landscape">Landscape</option>
                        <option value="Interior">Interior</option>
                        <option value="CAD">CAD & Drafting</option>
                    </select>
                </div>
                
                <div class="mb-4">
                    <label for="image" class="form-label text-uppercase small text-muted fw-bold">Select File</label>
                    <input type="file" class="form-control form-dark-control" id="image" name="image" required>
                </div>
                
                <button type="submit" name="submit_gallery" class="btn-gold-filled w-100 py-3 text-uppercase fw-bold" style="font-size: 0.85rem; letter-spacing: 0.05em;">Upload to Gallery</button>
            </form>
        </div>
    </div>
    
    
    <div class="col-lg-8">
        <div class="glass-card p-4">
            <h3 class="h5 text-white text-uppercase mb-4" style="letter-spacing: 0.05em;"><i class="bi bi-images text-accent-color me-2"></i>Gallery Index</h3>
            
            <div class="table-responsive">
                <table class="table table-dark table-striped table-hover align-middle border-secondary table-dark-custom">
                    <thead>
                        <tr>
                            <th scope="col" style="width: 15%; text-align: center;">Image</th>
                            <th scope="col" style="width: 40%;">Title</th>
                            <th scope="col" style="width: 25%;">Category</th>
                            <th scope="col" style="width: 20%; text-align: center;">Action</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php if (!empty($items)): ?>
                            <?php foreach ($items as $row): ?>
                                <tr>
                                    <td align="center">
                                        <img src="<?= BASE_URL . sanitize_input($row['image_path']) ?>" class="rounded border border-secondary" style="width: 60px; height: 45px; object-fit: cover;" alt="Gallery preview">
                                    </td>
                                    <td><strong><?= sanitize_input($row['title']) ?></strong></td>
                                    <td><span class="badge" style="background-color: var(--light-accent-color); color: var(--accent-color);"><?= sanitize_input($row['category']) ?></span></td>
                                    <td align="center">
                                        <a href="<?= BASE_URL ?>admin/gallery.php?delete=<?= $row['id'] ?>" class="btn btn-outline-danger btn-sm" onclick="return confirm('Delete this image from gallery?')" title="Delete Photo"><i class="bi bi-trash"></i></a>
                                    </td>
                                </tr>
                            <?php endforeach; ?>
                        <?php else: ?>
                            <tr>
                                <td colspan="4" class="text-center text-muted py-4">No gallery items loaded yet.</td>
                            </tr>
                        <?php endif; ?>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>

<?php require_once __DIR__ . '/footer.php'; ?>

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Editing:gallery.php