single-program.php

<?php

// if parent
// display the program-index context
// likely to be only 4:
//
// Open Policy,
// Open Culture,
// Open Knowledge,
// Community


// if child
// display the program-page context
// likely to be many, and may include:
//
// [Open Policy]
// Copyright
// Better Internet
//
// [Open Culture]
// Open Heritage
// Open Creativity
//
// [Open Knowledge]
// Open Education
// Open Climate
// Open Science
// Open Research (OA)
// Open Journalism
//
// [Community]
// Global Network
// Learning & Training
// Licenses & Tools Stewardship
// Open Source Community

?>
<?php
// body class will need to be dynamic .program-index, .program-page


if ( get_field('nested_programs') ) {
    $status = 'parent';
    $class = 'program-index';
} else {
    $status = 'child';
    $class = 'program-page';
}
?>

<!-- this class will need to be dynamic program-index, program-page -->
<?php get_header('', array( 'body-classes' => $class) ); ?>

<main>

<?php while ( have_posts() ) : the_post(); ?>

<header>

<h1><?php the_title(); ?></h1>

<?php if(get_field('sub_heading')) : ?>
<h2><?php the_field('sub_heading'); ?></h2>
<?php endif; ?>

<p><?php the_field('introduction'); ?></p>

</header>

<?php the_content(); ?>

<?php
    if ($status == 'parent') :
    $children = get_field('nested_programs');
?>
<article class="projects">
    <h2>On-going initiatives</h2>
    <p><?php the_field('nested_programs_lead_in_copy'); ?></p>
    <ul>
        <?php
            foreach ($children as $child) :

            $permalink = get_permalink( $child->ID );
            $title = get_the_title( $child->ID );
            $excerpt = get_the_excerpt( $child->ID );
        ?>
        <li>
            <article class="project">
                <h3><a href="<?php echo $permalink; ?>"><?php echo $title; ?></a></h3>
                <p><?php echo wp_trim_words($excerpt, 8); ?></p>
            </article>
        </li>
        <?php endforeach; ?>
    </ul>
</article>
<?php endif; ?>

<?php

$queried_object = get_queried_object();
$categories = get_the_category( $post->ID );
$catIDs = '';
foreach( $categories as $category) {
    $catIDs .= $category->cat_ID . ",";
}

$query = new WP_Query(array(
    'cat' => $catIDs,
    'post__not_in' => array($queried_object->ID),
    'post_type' => 'post',
    'posts_per_page' => 4,
    //'paged' => $paged,
));
?>

<?php if ( $query->have_posts() ) : ?>

<article class="posts related">
    <h2>Related posts</h2>

    <ul>

<?php  while ( $query->have_posts() ) : $query->the_post(); ?>
        <li>
        <article class="post">
            <header>
            <h2><a href="<?php echo the_permalink(); ?>"><?php the_title(); ?></a></h2>
            <?php if ( get_field('authorship') ) : ?>
            <span class="byline">by
                <?php
                $authors = get_field('authorship');
                    if( $authors ):
                    $i = 1;
                    $count = count($authors);

                    foreach( $authors as $author ):
                        $permalink = get_permalink( $author->ID );
                        $title = get_the_title( $author->ID );
                        $custom_field = get_field( 'field_name', $author->ID );
                        if ($i < $count) {
                            $separator = ',';
                        }
                        else {
                            $separator = '';
                        }
                ?>

                <a href="<?php echo esc_url( $permalink ); ?>"><?php echo esc_html( $title ); ?></a><?php echo $separator; ?>

                        <?php $i++; ?>
                        <?php endforeach; ?>
                    <?php endif; ?>
            </span>
            <?php endif; ?>
            <span class="categories">
                <?php the_category(', ') ?>
            </span>

        </header>


        </article>
        </li>

<?php endwhile; ?>

    </ul>
</article>

<?php endif; ?>

<?php endwhile; // end of the loop. ?>



</main>

<?php get_footer(); ?>