Register Podcast Meta Fields

<?php

/**

 * Add this as a new PHP snippet in WPCode to automatically build in the 

 * three new podcast meta fields (Key Concepts, References, Companion Link)

 * to the cb-episode post editing screen.

 */

add_action('add_meta_boxes', 'cb_register_podcast_meta_boxes');

function cb_register_podcast_meta_boxes() {

    add_meta_box(

        'cb_podcast_advanced_meta',

        'Podcast Episode: Advanced Details (LLM & Citations)',

        'cb_render_podcast_meta_boxes',

        'cb-episode',

        'normal',

        'high'

    );

}

function cb_render_podcast_meta_boxes($post) {

    // Add nonce for security

    wp_nonce_field('cb_podcast_meta_nonce_action', 'cb_podcast_meta_nonce');

    // Retrieve existing values

    $key_concepts = get_post_meta($post->ID, 'key_concepts', true);

    $references = get_post_meta($post->ID, 'referenced_in_episode', true);

    $companion = get_post_meta($post->ID, 'companion_post_url', true);

    echo '<style>

        .cb-meta-row { margin-bottom: 20px; }

        .cb-meta-row label { display: block; font-weight: bold; margin-bottom: 5px; }

        .cb-meta-row .description { color: #666; font-size: 12px; margin-bottom: 5px; display: block; }

        .cb-meta-row textarea { width: 100%; font-family: monospace; }

        .cb-meta-row input[type="url"] { width: 100%; }

    </style>';

    // Key Concepts

    echo '<div class="cb-meta-row">';

    echo '<label for="key_concepts">6. Key Concepts Defined</label>';

    echo '<span class="description">Format: "Concept — Definition" (one per line). Example: <em>Strategic silence — Deliberate non-response as an institutional posture.</em></span>';

    echo '<textarea id="key_concepts" name="key_concepts" rows="5">' . esc_textarea($key_concepts) . '</textarea>';

    echo '</div>';

    // References

    echo '<div class="cb-meta-row">';

    echo '<label for="referenced_in_episode">7. Referenced in this Episode (Citations)</label>';

    echo '<span class="description">The scholarly-citation-graph layer. Paste an HTML bulleted list or just text (it will be formatted automatically).</span>';

    echo '<textarea id="referenced_in_episode" name="referenced_in_episode" rows="5">' . esc_textarea($references) . '</textarea>';

    echo '</div>';

    // Companion URL

    echo '<div class="cb-meta-row">';

    echo '<label for="companion_post_url">8. Companion Post Link</label>';

    echo '<span class="description">Link to the response brief or written companion post.</span>';

    echo '<input type="url" id="companion_post_url" name="companion_post_url" value="' . esc_attr($companion) . '" placeholder="https://..." />';

    echo '</div>';

}

add_action('save_post', 'cb_save_podcast_meta_boxes');

function cb_save_podcast_meta_boxes($post_id) {

    // Security check

    if (!isset($_POST['cb_podcast_meta_nonce']) || !wp_verify_nonce($_POST['cb_podcast_meta_nonce'], 'cb_podcast_meta_nonce_action')) {

        return;

    }

    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;

    if (!current_user_can('edit_post', $post_id)) return;

    // Save Key Concepts

    if (isset($_POST['key_concepts'])) {

        update_post_meta($post_id, 'key_concepts', sanitize_textarea_field($_POST['key_concepts']));

    }

    // Save References (allowing basic HTML for lists)

    if (isset($_POST['referenced_in_episode'])) {

        update_post_meta($post_id, 'referenced_in_episode', wp_kses_post($_POST['referenced_in_episode']));

    }

    // Save Companion URL

    if (isset($_POST['companion_post_url'])) {

        update_post_meta($post_id, 'companion_post_url', sanitize_url($_POST['companion_post_url']));

    }

}

?>