<?php
/**
 * Related Posts for Astra theme.
 *
 * @package     Astra
 * @author      Brainstorm Force
 * @copyright   Copyright (c) 2021, Brainstorm Force
 * @link        https://www.brainstormforce.com
 * @since       Astra 3.5.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * Breadcrumbs Markup Initial Setup
 *
 * @since 3.5.0
 */
class Astra_Related_Posts_Markup {

	/**
	 *  Constructor
	 */
	public function __construct() {
		add_action( 'astra_entry_after', array( $this, 'astra_related_posts_markup' ), 10 );
	}

	/**
	 * Enable/Disable Single Post -> Related Posts section.
	 *
	 * @since 3.5.0
	 * @return void
	 */
	public function astra_related_posts_markup() {
		if ( astra_target_rules_for_related_posts() ) {
			$this->astra_get_related_posts();
		}
	}

	/**
	 * Related Posts markup.
	 *
	 * @since 3.5.0
	 * @return bool
	 */
	public function astra_get_related_posts() {
		global $post;
		$post_id                   = $post->ID;
		$related_posts_title       = astra_get_option( 'related-posts-title' );
		$related_post_meta         = astra_get_option( 'related-posts-meta-structure' );
		$related_post_structure    = astra_get_option_meta( 'related-posts-structure' );
		$exclude_ids               = apply_filters( 'astra_related_posts_exclude_post_ids', array( $post_id ), $post_id );
		$related_posts_total_count = absint( astra_get_option( 'related-posts-total-count', 2 ) );

		// Get related posts by WP_Query.
		$query_posts = $this->astra_get_related_posts_by_query( $post_id );

		if ( $query_posts ) {

			if ( ! $query_posts->have_posts() ) {
				return apply_filters( 'astra_related_posts_no_posts_avilable_message', '', $post_id );
			}

			// Added flag to load wrapper section 'ast-single-related-posts-container' only once, because as we removed 'posts__not_in' param from WP_Query and we conditionally handle posts__not_in below so it needs to verify if there are other posts as well to load, then only we will display wrapper.
			$related_posts_section_loaded = false;

			do_action( 'astra_related_posts_loop_before' );

			/**
			 * WP_Query posts loop.
			 *
			 * Used $post_counter & ( $post_counter < $total_posts_count ) condition to manage posts in while loop because there is case where manual 'post__not_in' condition handling scenario fails within loop.
			 *
			 * # CASE EXAMPLE - If total posts set to 4 (where 'post__not_in' not used in WP_Query) so there is a chance that out of those 4 posts, 1 post will be currently active on frontend.
			 *
			 * So what will happen in this case - Within following loop the current post will exclude by if condition & only 3 posts will be shown up.
			 *
			 * To avoid such cases $post_counter & ( $post_counter < $total_posts_count ) condition used.
			 *
			 * @since 3.5.0
			 */
			$post_counter      = 1;
			$total_posts_count = $related_posts_total_count + 1;

			while ( $query_posts->have_posts() && $post_counter < $total_posts_count ) {
				$query_posts->the_post();
				$post_id    = get_the_ID();
				$output_str = astra_get_post_meta( $related_post_meta );

				if ( is_array( $exclude_ids ) && ! in_array( $post_id, $exclude_ids ) ) {

					if ( false === $related_posts_section_loaded ) {

						echo '<div class="ast-single-related-posts-container">'; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

						do_action( 'astra_related_posts_title_before' );

						if ( '' !== $related_posts_title ) {
							echo apply_filters( // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
								'astra_related_posts_title',
								sprintf(
									'<div class="ast-related-posts-title-section"> <%1$s class="ast-related-posts-title"> %2$s </%1$s> </div>',
									'h2',
									$related_posts_title
								)
							);
						}

						do_action( 'astra_related_posts_title_after' );

						echo '<div class="ast-related-posts-wrapper">'; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

						$related_posts_section_loaded = true;
					}

					?>
						<article <?php post_class( 'ast-related-post' ); ?>>
							<div class="ast-related-posts-inner-section">
								<div class="ast-related-post-content">
									<?php
										// Render post based on order of Featured Image & Title-Meta.
									if ( is_array( $related_post_structure ) ) {
										foreach ( $related_post_structure as $post_thumb_title_order ) {
											if ( 'featured-image' === $post_thumb_title_order ) {
												do_action( 'astra_related_post_before_featured_image', $post_id );
												$this->astra_get_related_post_featured_image( $post_id );
												do_action( 'astra_related_post_after_featured_image', $post_id );
											} else {
												?>
														<header class="entry-header related-entry-header">
														<?php
															$this->astra_get_related_post_title( $post_id );
															echo apply_filters( 'astra_related_posts_meta_html', '<div class="entry-meta">' . $output_str . '</div>', $output_str ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
														?>
														</header>
													<?php
											}
										}
									}
									?>
									<div class="entry-content clear">
										<?php
											$this->astra_get_related_post_excerpt( $post_id );
											$this->astra_get_related_post_read_more( $post_id );
										?>
									</div>
								</div>
							</div>
						</article>
					<?php
					$post_counter++;
				}

				wp_reset_postdata();
			}

			if ( true === $related_posts_section_loaded ) {
				echo '</div> </div>'; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			}

			do_action( 'astra_related_posts_loop_after' );
		}
	}

	/**
	 * Render Post CTA button HTML marup.
	 *
	 * @param int $current_post_id current post ID.
	 *
	 * @since 3.5.0
	 */
	public function astra_get_related_post_read_more( $current_post_id ) {
		if ( ! astra_get_option( 'enable-related-posts-excerpt' ) ) {
			return;
		}

		$related_posts_content_type = apply_filters( 'astra_related_posts_content_type', 'excerpt' );

		if ( 'full-content' === $related_posts_content_type ) {
			return;
		}

		$target = apply_filters( 'astra_related_post_cta_target', '_self' );

		$cta_text = apply_filters( 'astra_related_post_read_more_text', astra_get_option( 'blog-read-more-text' ) );

		$show_read_more_as_button = apply_filters( 'astra_related_post_read_more_as_button', astra_get_option( 'blog-read-more-as-button' ) );

		$class = '';

		if ( $show_read_more_as_button ) {
			$class = 'ast-button';
		}

		$custom_class = apply_filters( 'astra_related_post_cta_custom_classes', $class );

		do_action( 'astra_related_post_before_cta', $current_post_id );

		?>
			<p class="ast-related-post-cta read-more">
				<a class="ast-related-post-link <?php echo esc_attr( $custom_class ); ?>" href="<?php echo esc_url( apply_filters( 'astra_related_post_link', get_the_permalink(), $current_post_id ) ); ?>" aria-label="<?php echo esc_attr__( 'Related post link', 'astra' ); ?>" target="<?php echo esc_attr( $target ); ?>" rel="bookmark noopener noreferrer"><?php echo esc_html( $cta_text ); ?></a>
			</p>
		<?php

		do_action( 'astra_related_post_after_cta', $current_post_id );
	}

	/**
	 * Related Posts Excerpt markup.
	 *
	 * @param int $current_post_id current post ID.
	 *
	 * @since 3.5.0
	 */
	public function astra_get_related_post_excerpt( $current_post_id ) {
		if ( ! astra_get_option( 'enable-related-posts-excerpt' ) ) {
			return;
		}

		$related_posts_content_type = apply_filters( 'astra_related_posts_content_type', 'excerpt' );

		if ( 'full-content' === $related_posts_content_type ) {
			return the_content();
		}

		$excerpt_length = absint( astra_get_option( 'related-posts-excerpt-count' ) );

		$excerpt = wp_trim_words( get_the_excerpt(), $excerpt_length );

		if ( ! $excerpt ) {
			$excerpt = null;
		}

		$excerpt = apply_filters( 'astra_related_post_excerpt', $excerpt, $current_post_id );

		do_action( 'astra_related_post_before_excerpt', $current_post_id );

		?>
			<p class="ast-related-post-excerpt entry-content clear">
				<?php echo wp_kses_post( $excerpt ); ?>
			</p>
		<?php

		do_action( 'astra_related_post_after_excerpt', $current_post_id );
	}

	/**
	 * Render Post Title HTML.
	 *
	 * @param int $current_post_id current post ID.
	 *
	 * @since 3.5.0
	 */
	public function astra_get_related_post_title( $current_post_id ) {
		$related_post_structure = astra_get_option_meta( 'related-posts-structure' );

		if ( ! in_array( 'title-meta', $related_post_structure ) ) {
			return;
		}

		$target    = apply_filters( 'astra_related_post_title_opening_target', '_self' );
		$title_tag = apply_filters( 'astra_related_post_title_tag', 'h3' );

		do_action( 'astra_related_post_before_title', $current_post_id );
		?>
			<<?php echo esc_html( $title_tag ); ?> class="ast-related-post-title entry-title">
				<a href="<?php echo esc_url( apply_filters( 'astra_related_post_link', get_the_permalink(), $current_post_id ) ); ?>" target="<?php echo esc_attr( $target ); ?>" rel="bookmark noopener noreferrer"><?php the_title(); ?></a>
			</<?php echo esc_html( $title_tag ); ?>>
		<?php
		do_action( 'astra_related_post_after_title', $current_post_id );
	}

	/**
	 * Render Featured Image HTML.
	 *
	 * @param int     $current_post_id current post ID.
	 * @param string  $before Markup before thumbnail image.
	 * @param string  $after  Markup after thumbnail image.
	 * @param boolean $echo   Output print or return.
	 * @return string|null
	 *
	 * @since 3.5.0
	 */
	public function astra_get_related_post_featured_image( $current_post_id, $before = '', $after = '', $echo = true ) {
		$related_post_structure = astra_get_option_meta( 'related-posts-structure' );

		if ( ! in_array( 'featured-image', $related_post_structure ) ) {
			return;
		}

		$post_thumb = apply_filters(
			'astra_related_post_featured_image_markup',
			get_the_post_thumbnail(
				$current_post_id,
				apply_filters( 'astra_related_posts_thumbnail_default_size', 'large' ),
				apply_filters( 'astra_related_posts_thumbnail_itemprop', '' )
			)
		);

		$appended_class = has_post_thumbnail( $current_post_id ) ? 'post-has-thumb' : 'ast-no-thumb';

		$featured_img_markup = '<div class="ast-related-post-featured-section ' . $appended_class . '">';

		if ( '' !== $post_thumb ) {
			$featured_img_markup .= '<div class="post-thumb-img-content post-thumb">';
			$featured_img_markup .= astra_markup_open(
				'ast-related-post-image',
				array(
					'open'  => '<a %s>',
					'echo'  => false,
					'attrs' => array(
						'class' => '',
						'href'  => esc_url( get_permalink() ),
					),
				)
			);
			$featured_img_markup .= $post_thumb;
			$featured_img_markup .= '</a> </div>';
		}

		$featured_img_markup  = apply_filters( 'astra_related_post_featured_image_after', $featured_img_markup );
		$featured_img_markup .= '</div>';

		$featured_img_markup = apply_filters( 'astra_related_post_thumbnail', $featured_img_markup, $before, $after );

		if ( false === $echo ) {
			return $before . $featured_img_markup . $after;
		}

		echo $before . $featured_img_markup . $after; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
	}

	/**
	 * Get related posts based on configurations.
	 *
	 * @param int $post_id Current Post ID.
	 *
	 * @since 3.5.0
	 *
	 * @return WP_Query|bool
	 */
	public function astra_get_related_posts_by_query( $post_id ) {
		$term_ids                  = array();
		$current_post_type         = get_post_type( $post_id );
		$related_posts_total_count = absint( astra_get_option( 'related-posts-total-count', 2 ) );
		// Taking one post extra in loop because if current post excluded from while loop then this extra one post will cover total post count. Apperently avoided 'post__not_in' from WP_Query.
		$updated_total_posts_count = $related_posts_total_count + 1;
		$related_posts_order_by    = astra_get_option( 'related-posts-order-by', 'date' );
		$related_posts_order       = astra_get_option( 'related-posts-order', 'desc' );
		$related_posts_based_on    = astra_get_option( 'related-posts-based-on', 'categories' );

		$query_args = array(
			'update_post_meta_cache' => false,
			'posts_per_page'         => $updated_total_posts_count,
			'no_found_rows'          => true,
			'post_status'            => 'publish',
			'post_type'              => $current_post_type,
			'orderby'                => $related_posts_order_by,
			'fields'                 => 'ids',
			'order'                  => $related_posts_order,
		);

		if ( 'tags' === $related_posts_based_on ) {
			$terms = get_the_tags( $post_id );

			if ( ! empty( $terms ) && ! is_wp_error( $terms ) ) {
				$term_ids = wp_list_pluck( $terms, 'term_id' );
			}

			$query_args['tag__in'] = $term_ids;

		} else {
			$terms = get_the_category( $post_id );

			if ( ! empty( $terms ) && ! is_wp_error( $terms ) ) {
				$term_ids = wp_list_pluck( $terms, 'term_id' );
			}

			$query_args['category__in'] = $term_ids;
		}

		$query_args = apply_filters( 'astra_related_posts_query_args', $query_args );

		return new WP_Query( $query_args );
	}
}

/**
 *  Kicking this off by creating NEW instance.
 */
new Astra_Related_Posts_Markup();
