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Filename : view-pdf.php
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<?php include "../config.php"; ?>
<!DOCTYPE html>
<html>
<head>
    <title>PDF Gallery</title>
    <link href="table.css" rel="stylesheet">
        <meta content="width=device-width, initial-scale=1.0" name="viewport">
    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.10.0/css/all.min.css" rel="stylesheet">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.4.1/font/bootstrap-icons.css" rel="stylesheet">
    <style>
        .thumbnail {
            width: 50px;
            height: 50px;
        }

        table {
            border-collapse: collapse;
            width: 100%;
        }

        th, td {
            text-align: left;
            padding: 8px;
        }

        th {
            background-color: #f2f2f2;
        }

        tr:nth-child(even) {
            background-color: #f2f2f2;
        }

        .edit-icon, .delete-icon {
            font-size: 16px;
            color: #007bff;
            text-decoration: none;
            margin: 0 5px;
        }
    </style>
</head>
<body>
    <h1>PDF Gallery</h1>
<ul>

        <li>  <a href="addpdf.php">Add PDF</a></li>
        
        <li>  <a href="index.php">Main menu</a></li>



</ul>
    <!-- Link to upload PDF -->
  



    <br>

    <!-- Table to display PDF information -->
    <table>
        <thead>
            <tr>
                <th>ID</th>
                <th>Book Name</th>
                <th>Title Cover</th>


                <th>PDF File</th>
                <th>PDF File Size</th>
                <th>Edit</th>
                <th>Delete</th>
            </tr>
        </thead>
        <tbody>
            <?php
            // Handle updating "hits" count when a user accesses the PDF file
            if (isset($_GET['file'])) {
                $pdfFile = $_GET['file'];
                $updateHitsQuery = "UPDATE pdf_books SET hits = hits + 1 WHERE pdf_filename = '$pdfFile'";
                $conn->query($updateHitsQuery);
            }

            // SQL query to retrieve PDF information from the database
            $sql = "SELECT * FROM pdf_books ORDER BY upload_date DESC";
            $result = $conn->query($sql);

            if ($result->num_rows > 0) {
                while ($row = $result->fetch_assoc()) {
                    echo "<tr>";
                    echo "<td>" . $row["id"] . "</td>";
                    echo "<td>" . $row["book_name"] . "</td>";
                    echo "<td><img class='thumbnail' src='uploads/pdf/title_covers/" . $row["title_cover"] . "' alt='Title Cover'></td>";



                    $fileSize = formatSizeUnits(filesize("pdf_files/" . $row["pdf_filename"]));
                    echo "<td><a href='pdf_download.php?file=" . $row["pdf_filename"] . "'><center><i class='fa fa-download'></i></center></a></td>";
                    echo "<td>" . $fileSize . "</td>";

                    // Edit and Delete icons
                    echo "<td><a href='edit_pdf.php?id=" . $row["id"] . "' class='edit-icon'><i class='bi bi-pencil'></i></a></td>";
                    echo "<td><a href='delete_pdf.php?id=" . $row["id"] . "' class='delete-icon'><i class='bi bi-trash'></i></a></td>";

                    echo "</tr>";
                }
            } else {
                echo "<tr><td colspan='9'>No PDFs found in the database.</td></tr>";
            }

            // Close the database connection
            $conn->close();

            function formatSizeUnits($bytes) {
                // Function to format file size
                if ($bytes >= 1073741824) {
                    $bytes = number_format($bytes / 1073741824, 2) . ' GB';
                } elseif ($bytes >= 1048576) {
                    $bytes = number_format($bytes / 1048576, 2) . ' MB';
                } elseif ($bytes >= 1024) {
                    $bytes = number_format($bytes / 1024, 2) . ' KB';
                } elseif ($bytes > 1) {
                    $bytes = $bytes . ' bytes';
                } elseif ($bytes == 1) {
                    $bytes = $bytes . ' byte';
                } else {
                    $bytes = '0 bytes';
                }

                return $bytes;
            }
            ?>
        </tbody>
    </table>
</body>
</html>