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Filename : post-series.php
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<?php

/**
 * Post Series.
 *
 * @package Total WordPress theme
 * @subpackage Partials
 * @version 5.10
 */

defined( 'ABSPATH' ) || exit;

if ( ! taxonomy_exists( 'post_series' )
	|| post_password_required()
	|| ! class_exists( 'TotalThemeCore\Post_Series' )
) {
	return;
}

// Store current Post object.
$current_post = get_post();

// Get post terms.
$terms = get_the_terms( $current_post, 'post_series' );

// Return if not term found.
if ( empty( $terms ) || is_wp_error( $terms ) ) {
	return;
}

if ( function_exists( 'totalthemecore_call_static' ) ) {
	$query_order = totalthemecore_call_static( 'Post_Series', 'get_query_order' );
} else {
	$query_order = 'ASC';
}

// Post query args.
$args = (array) apply_filters( 'wpex_post_series_query_args', [
	'post_type'        => get_post_type(),
	'posts_per_page'   => -1,
	'orderby'          => 'date',
	'order'            => ( is_string( $query_order ) && in_array( strtoupper( $query_order ), [ 'ASC', 'DESC' ] ) ) ? $query_order : 'ASC',
	'no_found_rows'    => true,
	'tax_query'        => [ [
		'taxonomy' => 'post_series',
		'field'    => 'id',
		'terms'    => $terms[0]->term_id
	] ],
] );

// Get all posts in series.
$wpex_query = new wp_query( $args );

// Display series if posts are found.
if ( $wpex_query->have_posts() ) : ?>

	<div class="wpex-post-series-toc wpex-boxed wpex-p-30">

		<div class="wpex-post-series-toc-header wpex-text-1 wpex-text-xl wpex-font-semibold wpex-mb-15"><a class="wpex-inherit-color wpex-no-underline" href="<?php echo esc_url( get_term_link( $terms[0], 'post_series' ) ); ?>"><?php echo esc_html( $terms[0]->name ); ?></a></div>

		<div class="wpex-post-series-toc-list wpex-last-mb-0"><?php

			// Loop through posts.
			$count=0;
			foreach ( $wpex_query->posts as $post ) : setup_postdata( $post );
				$count++;
				$is_current_post = ( $post->ID === $current_post->ID );

				$entry_classes = [
					'wpex-post-series-toc-entry',
					'wpex-mb-5',
				];

				if ( $is_current_post ) {
					$entry_classes[] = 'wpex-active';
				}

				?>

				<div class="<?php echo esc_attr( implode( ' ', $entry_classes ) ); ?>">
					<span class="wpex-post-series-toc-number post-series-count wpex-font-medium"><?php echo absint( $count ); ?>.</span>
					<?php if ( $is_current_post ) { ?>
						<span class="wpex-post-series-toc-active"><?php the_title(); ?></span>
					<?php } else { ?>
						<a href="<?php wpex_permalink(); ?>" title="<?php wpex_esc_title(); ?>" class="wpex-post-series-toc-link wpex-hover-underline"><?php the_title(); ?></a>
					<?php } ?>
				</div>

			<?php endforeach;

		?></div>

	</div>

<?php
endif;

// Reset post data to prevent conflicts with other queries.
wp_reset_postdata();