wp-duckbehaviorjournal/functions.php

<?php
function duck_behavior_journal_setup()
{
    add_theme_support('post-thumbnails');
    add_theme_support('title-tag');
    register_nav_menus(array(
        'primary' => __('Primary Menu', 'duck-behavior-journal'),
        'footer'  => __('Footer Menu', 'duck-behavior-journal'),
    ));

    add_theme_support('custom-logo');

    add_theme_support('custom-header', array(
        'default-image' => get_template_directory_uri() . '/assets/img/hero.png',
        'width'         => 1920,
        'height'        => 1080,
        'flex-height'   => true,
        'flex-width'    => true,
    ));
}
add_action('after_setup_theme', 'duck_behavior_journal_setup');

function duck_behavior_journal_scripts()
{
    wp_enqueue_style('bootstrap-css', get_template_directory_uri() . '/assets/dist/css/bootstrap.min.css');
    wp_enqueue_style('theme-style', get_stylesheet_uri());
    wp_enqueue_script('jquery', get_template_directory_uri() . '/assets/dist/js/jquery-3.5.1.min.js', array(), null, true);
    wp_enqueue_script('bootstrap-js', get_template_directory_uri() . '/assets/dist/js/bootstrap.min.js', array(), null, true);
}
add_action('wp_enqueue_scripts', 'duck_behavior_journal_scripts');

require_once get_template_directory() . '/class-wp-bootstrap-navwalker.php';

function duck_behavior_journal_customizer($wp_customize)
{
    // Hero Image Section
    $wp_customize->add_section('hero_image_section', array(
        'title'    => __('Hero Section', 'duck-behavior-journal'),
        'priority' => 30,
    ));

    // Hero Image Setting
    $wp_customize->add_setting('hero_image', array(
        'default'   => get_template_directory_uri() . '/assets/hero.jpg',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control(new WP_Customize_Image_Control($wp_customize, 'hero_image_control', array(
        'label'    => __('Hero Image', 'duck-behavior-journal'),
        'section'  => 'hero_image_section',
        'settings' => 'hero_image',
    )));

    // Hero Title Setting
    $wp_customize->add_setting('hero_title', array(
        'default'   => 'Advancing the Understanding of Duck Behavior',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('hero_title_control', array(
        'label'    => __('Hero Title', 'duck-behavior-journal'),
        'section'  => 'hero_image_section',
        'settings' => 'hero_title',
        'type'     => 'text',
    ));

    // Hero Subtitle Setting
    $wp_customize->add_setting('hero_subtitle', array(
        'default'   => 'Through Rigorous Scientific Research',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('hero_subtitle_control', array(
        'label'    => __('Hero Subtitle', 'duck-behavior-journal'),
        'section'  => 'hero_image_section',
        'settings' => 'hero_subtitle',
        'type'     => 'text',
    ));

    // Hero Primary Button Text Setting
    $wp_customize->add_setting('hero_primary_button_text', array(
        'default'   => 'Submit Your Research',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('hero_primary_button_text_control', array(
        'label'    => __('Hero Primary Button Text', 'duck-behavior-journal'),
        'section'  => 'hero_image_section',
        'settings' => 'hero_primary_button_text',
        'type'     => 'text',
    ));

    // Hero Primary Button URL Setting
    $wp_customize->add_setting('hero_primary_button_url', array(
        'default'   => '#',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('hero_primary_button_url_control', array(
        'label'    => __('Hero Primary Button URL', 'duck-behavior-journal'),
        'section'  => 'hero_image_section',
        'settings' => 'hero_primary_button_url',
        'type'     => 'url',
    ));

    // Hero Secondary Button Text Setting
    $wp_customize->add_setting('hero_secondary_button_text', array(
        'default'   => 'Subscribe to the Journal',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('hero_secondary_button_text_control', array(
        'label'    => __('Hero Secondary Button Text', 'duck-behavior-journal'),
        'section'  => 'hero_image_section',
        'settings' => 'hero_secondary_button_text',
        'type'     => 'text',
    ));

    // Hero Secondary Button URL Setting
    $wp_customize->add_setting('hero_secondary_button_url', array(
        'default'   => '#',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('hero_secondary_button_url_control', array(
        'label'    => __('Hero Secondary Button URL', 'duck-behavior-journal'),
        'section'  => 'hero_image_section',
        'settings' => 'hero_secondary_button_url',
        'type'     => 'url',
    ));

    // Footer Section
    $wp_customize->add_section('footer_section', array(
        'title'    => __('Footer', 'duck-behavior-journal'),
        'priority' => 40,
    ));

    // Footer Text Setting
    $wp_customize->add_setting('footer_text', array(
        'default'   => '&copy; ' . date('Y') . ' Duck Behavior Journal. All rights reserved.',
        'transport' => 'refresh',
    ));

    $wp_customize->add_control('footer_text_control', array(
        'label'    => __('Footer Text', 'duck-behavior-journal'),
        'section'  => 'footer_section',
        'settings' => 'footer_text',
        'type'     => 'textarea',
    ));

    // Footer Social Media Links
    $social_media = array('facebook', 'twitter', 'linkedin');

    foreach ($social_media as $platform) {
        $wp_customize->add_setting("footer_{$platform}_link", array(
            'default'   => '#',
            'transport' => 'refresh',
        ));

        $wp_customize->add_control("footer_{$platform}_link_control", array(
            'label'    => __(ucfirst($platform) . ' URL', 'duck-behavior-journal'),
            'section'  => 'footer_section',
            'settings' => "footer_{$platform}_link",
            'type'     => 'url',
        ));
    }
}
add_action('customize_register', 'duck_behavior_journal_customizer');

function create_article_post_type()
{
    $labels = array(
        'name'                  => _x('Articles', 'Post type general name', 'duck-behavior-journal'),
        'singular_name'         => _x('Article', 'Post type singular name', 'duck-behavior-journal'),
        'menu_name'             => _x('Articles', 'Admin Menu text', 'duck-behavior-journal'),
        'name_admin_bar'        => _x('Article', 'Add New on Toolbar', 'duck-behavior-journal'),
        'add_new'               => __('Add New', 'duck-behavior-journal'),
        'add_new_item'          => __('Add New Article', 'duck-behavior-journal'),
        'new_item'              => __('New Article', 'duck-behavior-journal'),
        'edit_item'             => __('Edit Article', 'duck-behavior-journal'),
        'view_item'             => __('View Article', 'duck-behavior-journal'),
        'all_items'             => __('All Articles', 'duck-behavior-journal'),
        'search_items'          => __('Search Articles', 'duck-behavior-journal'),
        'parent_item_colon'     => __('Parent Articles:', 'duck-behavior-journal'),
        'not_found'             => __('No articles found.', 'duck-behavior-journal'),
        'not_found_in_trash'    => __('No articles found in Trash.', 'duck-behavior-journal'),
        'featured_image'        => _x('Featured Image', 'Overrides the “Featured Image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
        'set_featured_image'    => _x('Set featured image', 'Overrides the “Set featured image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
        'remove_featured_image' => _x('Remove featured image', 'Overrides the “Remove featured image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
        'use_featured_image'    => _x('Use as featured image', 'Overrides the “Use as featured image” phrase for this post type. Added in 4.3', 'duck-behavior-journal'),
        'archives'              => _x('Article archives', 'The post type archive label used in nav menus. Default “Post Archives”. Added in 4.4', 'duck-behavior-journal'),
        'insert_into_item'      => _x('Insert into article', 'Overrides the “Insert into post”/”Insert into page” phrase (used when inserting media into a post). Added in 4.4', 'duck-behavior-journal'),
        'uploaded_to_this_item' => _x('Uploaded to this article', 'Overrides the “Uploaded to this post”/”Uploaded to this page” phrase (used when viewing media attached to a post). Added in 4.4', 'duck-behavior-journal'),
        'filter_items_list'     => _x('Filter articles list', 'Screen reader text for the filter links heading on the post type listing screen. Default “Filter posts list”/”Filter pages list”. Added in 4.4', 'duck-behavior-journal'),
        'items_list_navigation' => _x('Articles list navigation', 'Screen reader text for the pagination heading on the post type listing screen. Default “Posts list navigation”/”Pages list navigation”. Added in 4.4', 'duck-behavior-journal'),
        'items_list'            => _x('Articles list', 'Screen reader text for the items list heading on the post type listing screen. Default “Posts list”/”Pages list”. Added in 4.4', 'duck-behavior-journal'),
    );

    $args = array(
        'labels'             => $labels,
        'public'             => true,
        'publicly_queryable' => true,
        'show_ui'            => true,
        'show_in_menu'       => true,
        'query_var'          => true,
        'rewrite'            => array('slug' => 'article'),
        'capability_type'    => 'post',
        'has_archive'        => true,
        'hierarchical'       => false,
        'menu_position'      => null,
        'supports'           => array('title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments'),
    );

    register_post_type('article', $args);
}

add_action('init', 'create_article_post_type');

function add_article_meta_boxes()
{
    add_meta_box(
        'article_authors',
        __('Article Authors', 'duck-behavior-journal'),
        'render_article_authors_meta_box',
        'article',
        'side',
        'default'
    );
}
add_action('add_meta_boxes', 'add_article_meta_boxes');

function render_article_authors_meta_box($post)
{
    $authors = get_post_meta($post->ID, 'article_authors', true);
?>
    <div id="article-authors">
        <div id="article-authors-list">
            <?php
            if (!empty($authors)) {
                foreach ($authors as $index => $author) {
            ?>
                    <p>
                        <input type="text" name="article_authors[]" value="<?php echo esc_attr($author); ?>" />
                        <button type="button" class="button remove-author-button" data-index="<?php echo $index; ?>"><?php _e('Remove', 'duck-behavior-journal'); ?></button>
                    </p>
                <?php
                }
            } else {
                ?>
                <p><input type="text" name="article_authors[]" value="" /></p>
            <?php
            }
            ?>
        </div>
        <button type="button" id="add-author-button" class="button"><?php _e('Add Author', 'duck-behavior-journal'); ?></button>
    </div>
    <script>
        jQuery(document).ready(function($) {
            $('#add-author-button').on('click', function() {
                $('#article-authors-list').append('<p><input type="text" name="article_authors[]" value="" /><button type="button" class="button remove-author-button"><?php _e('Remove', 'duck-behavior-journal'); ?></button></p>');
            });

            $(document).on('click', '.remove-author-button', function() {
                $(this).parent().remove();
            });
        });
    </script>
<?php
}

function save_article_authors_meta_box($post_id)
{
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;
    if (!isset($_POST['article_authors'])) return;

    $authors = array_map('sanitize_text_field', $_POST['article_authors']);
    update_post_meta($post_id, 'article_authors', $authors);
}
add_action('save_post', 'save_article_authors_meta_box');