Crocoblock JetEngine Meta Field-Enhanced PDF Management in WordPress

gistfile1.txt

Youtube tutorials:
https://www.youtube.com/watch?v=W6j36I57xgo
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CSS Code For Download button:
/* Style for Download PDF link */
.YOUR CLASSNAME {
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    background-color: #164AFE;
    border-radius: 30px;   
    padding: 8px 10px;        
    display: inline-block;
    transition: background-color 0.3s ease;
}

.YOUR CLASSNAME:hover {
    background-color: #06090C;
    color: #ffffff;
}

CSS Code For View button:
/* Style for View PDF link */
.YOUR CLASSNAME {
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    background-color: #E04E4E;
    border-radius: 30px;   
    padding: 8px 10px;        
    display: inline-block;
    transition: background-color 0.3s ease;
}

.YOUR CLASSNAME:hover {
    background-color: #06090C;
    color: #ffffff;
}

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// Add Dashboard Widget
function custom_dashboard_widget() {
    wp_add_dashboard_widget('custom_dashboard_widget', 'Manage PDF Shortcodes', 'custom_dashboard_widget_display');
}
add_action('wp_dashboard_setup', 'custom_dashboard_widget');

// Display Dashboard Widget Form
function custom_dashboard_widget_display() {
    $pdf_shortcodes = get_option('custom_pdf_shortcodes', []);

    // Handle form submission for adding/editing shortcodes
    if (isset($_POST['submit_pdf_shortcode']) && check_admin_referer('pdf_shortcode_nonce')) {
        $index = isset($_POST['index']) ? intval($_POST['index']) : -1;
        $action = sanitize_text_field($_POST['pdf_action']);
        $title = sanitize_text_field($_POST['pdf_title']);
        $meta_field = sanitize_text_field($_POST['pdf_meta_field']);
        $shortcode_name = $action . '_' . $meta_field;

        $shortcode_data = ['action' => $action, 'title' => $title, 'meta_field' => $meta_field, 'shortcode_name' => $shortcode_name];

        if ($index >= 0 && isset($pdf_shortcodes[$index])) {
            $pdf_shortcodes[$index] = $shortcode_data;
        } else {
            array_unshift($pdf_shortcodes, $shortcode_data);
        }

        update_option('custom_pdf_shortcodes', $pdf_shortcodes);
    }

    // Handle remove requests
    if (isset($_POST['remove_pdf_shortcode']) && check_admin_referer('pdf_shortcode_nonce')) {
        $index = isset($_POST['index']) ? intval($_POST['index']) : -1;
        if ($index >= 0 && isset($pdf_shortcodes[$index])) {
            array_splice($pdf_shortcodes, $index, 1);
            update_option('custom_pdf_shortcodes', $pdf_shortcodes);
        }
    }

    // Handle edit requests
    $edit_index = -1;
    if (isset($_POST['edit_pdf_shortcode'])) {
        $edit_index = isset($_POST['index']) ? intval($_POST['index']) : -1;
    }

    // Display form for adding a new shortcode or editing an existing one
    $current_action = $edit_index >= 0 ? $pdf_shortcodes[$edit_index]['action'] : '';
    $current_title = $edit_index >= 0 ? $pdf_shortcodes[$edit_index]['title'] : '';
    $current_meta_field = $edit_index >= 0 ? $pdf_shortcodes[$edit_index]['meta_field'] : '';
    custom_pdf_shortcode_form($current_action, $current_title, $current_meta_field, $edit_index);

    // Display existing shortcodes
    echo '<h4>Existing Shortcodes:</h4>';
    echo '<ul style="list-style: none; padding: 0;">';
    foreach ($pdf_shortcodes as $index => $shortcode) {
        echo '<li style="margin-bottom: 10px; padding: 10px; border: 1px solid #ddd; border-radius: 6px;">';
        echo ($index + 1) . '. Title: ' . esc_html($shortcode['title']) . ', Meta Field: ' . esc_html($shortcode['meta_field']) . '<br>';
        echo '<span style="margin-top: 15px; display: block;"><strong>Shortcode: [' . esc_attr($shortcode['shortcode_name']) . ']</strong></span>';
        echo '<form method="post" style="display:inline; margin-left: 0px;"><input type="hidden" name="index" value="' . esc_attr($index) . '">';
        echo '<input type="submit" name="edit_pdf_shortcode" value="Edit" style="margin-right: 5px; background-color: #0073aa; color: white; border: none; border-radius: 6px; padding: 5px 10px; margin-top: 10px;">';
        echo '<input type="submit" name="remove_pdf_shortcode" value="Remove" style="background-color: #dc3232; color: white; border: none; border-radius: 6px; padding: 5px 10px; margin-top: 10px;">';
        wp_nonce_field('pdf_shortcode_nonce');
        echo '</form>';
        echo '</li>';
    }
    echo '</ul>';

    // Display CSS class information
    echo '<div style="border: 2px dotted red; font-size: 16px; font-weight: 400; padding: 10px; margin-top: 20px; border-radius: 6px;">';
    echo '<strong>For styling, use the shortcode name as the CSS class.</strong><br>';
    echo 'Example: If the shortcode is [view_download_pdf], use .view_download_pdf as the CSS class.';
    echo '</div>';
}

// Form for adding/editing a shortcode
function custom_pdf_shortcode_form($action = '', $title = '', $meta_field = '', $index = -1) {
    ?>
    <form action="" method="post" style="margin-bottom: 20px;">
        <input type="hidden" name="index" value="<?php echo esc_attr($index); ?>">
        <p>
            <label for="pdf_action">Action (view/download):</label>
            <select id="pdf_action" name="pdf_action" style="width: 100%; padding: 5px; border-radius: 6px; border: 1px solid #ddd;">
                <option value="view" <?php selected($action, 'view'); ?>>View</option>
                <option value="download" <?php selected($action, 'download'); ?>>Download</option>
            </select>
        </p>
        <p>
            <label for="pdf_title">Title:</label>
            <input type="text" id="pdf_title" name="pdf_title" value="<?php echo esc_attr($title); ?>" style="width: 100%; padding: 5px; border-radius: 6px; border: 1px solid #ddd;">
        </p>
        <p>
            <label for="pdf_meta_field">Meta Field Name:</label>
            <input type="text" id="pdf_meta_field" name="pdf_meta_field" value="<?php echo esc_attr($meta_field); ?>" style="width: 100%; padding: 5px; border-radius: 6px; border: 1px solid #ddd;">
        </p>
        <?php
        wp_nonce_field('pdf_shortcode_nonce');
        ?>
        <input type="submit" name="submit_pdf_shortcode" value="<?php echo $index >= 0 ? 'Save Changes' : 'Add Shortcode'; ?>" style="background-color: #0073aa; color: white; border: none; border-radius: 6px; padding: 5px 10px;">
    </form>
    <?php
}

// Register Shortcodes
foreach (get_option('custom_pdf_shortcodes', []) as $shortcode) {
    add_shortcode($shortcode['shortcode_name'], function($atts) use ($shortcode) {
        return custom_pdf_shortcode_handler($shortcode['meta_field'], $shortcode['action'], $shortcode['title'], $shortcode['shortcode_name']);
    });
}

// Shortcode Handler
function custom_pdf_shortcode_handler($meta_field_name, $action, $title, $shortcode_name) {
    $post_id = get_the_ID();
    $file_id = get_post_meta($post_id, $meta_field_name, true);

    if (empty($file_id)) {
        return ''; // Return empty if no file ID
    }

    $file_url = wp_get_attachment_url($file_id);
    if (empty($file_url)) {
        return ''; // Return empty if no file URL
    }

    $link_text = !empty($title) ? $title : ucfirst($action) . ' PDF';
    $download_attr = $action === 'download' ? ' download' : '';
    $target_attr = $action === 'view' ? ' target="_blank"' : '';

    return "<a href='" . esc_url($file_url) . "' class='" . esc_attr($shortcode_name) . "'$download_attr$target_attr>$link_text</a>";
}