<?php
if (!defined('ABSPATH')) exit; // if direct access 



function related_post_recursive_sanitize_arr($array)
{

    foreach ($array as $key => &$value) {
        if (is_array($value)) {
            $value = related_post_recursive_sanitize_arr($value);
        } else {
            $value = wp_kses_post($value);
        }
    }

    return $array;
}



add_action('the_content', 'related_post_display_auto');

function related_post_display_auto($content)
{

    $related_post_settings = get_option('related_post_settings');

    $post_types_display = isset($related_post_settings['post_types_display']) ? $related_post_settings['post_types_display'] : array();

    $post_id = get_the_ID();
    $post_type = get_post_type($post_id);


    $posttype = $post_type;
    $enable = isset($post_types_display[$posttype]['enable']) ? $post_types_display[$posttype]['enable'] : 'no';
    $related_post_enable = get_post_meta($post_id, 'related_post_enable', true);

    //var_dump($enable);

    if ($enable == 'yes' || $related_post_enable) {

        $content_position = isset($post_types_display[$posttype]['content_position']) ? $post_types_display[$posttype]['content_position'] : [];
        $paragraph_positions = isset($post_types_display[$posttype]['paragraph_positions']) ? $post_types_display[$posttype]['paragraph_positions'] : '';
        $view_type = isset($post_types_display[$posttype]['view_type']) ? $post_types_display[$posttype]['view_type'] : '';
        $headline_text = isset($post_types_display[$posttype]['headline_text']) ? $post_types_display[$posttype]['headline_text'] : '';

        $related_post_html  = do_shortcode('[related_post post_id="' . $post_id . '" view_type="' . $view_type . '" headline="' . $headline_text . '"]');

        $paragraph_positions = !empty($paragraph_positions) ? explode(',', $paragraph_positions) : array();


        //var_dump($paragraph_positions);

        $html = '';

        if (in_array('before', $content_position)) {

            $html .= do_shortcode('[related_post post_id="' . get_the_id() . '" view_type="' . $view_type . '" headline="' . $headline_text . '"]');
        }







        if (!empty($paragraph_positions) && is_singular($post_type)) {
            $split_by = "\n";
            $content_blocks = explode($split_by, $content);
            $content_blocks = array_filter($content_blocks);
            $content_blocks_count = count($content_blocks);

            $positions = array();
            foreach ($paragraph_positions as $position) {
                if (strpos($position, 'N') !== false) {


                    $position = str_replace('N', $content_blocks_count, $position);

                    if (strpos($position, '-') !== false) {

                        $position = explode('-', $position);

                        $max_pos = (int)$position[0];
                        $sub_pos = (int)$position[1];

                        $position = $max_pos - $sub_pos;
                    }

                    $positions[] = $position;
                } else {
                    $positions[] = $position;
                }
            }


            $content_html = '';

            $i = 1;
            foreach ($content_blocks as $content_block) {

                if (in_array($i, $positions)) {
                    $content_html .= $content_block . $related_post_html;
                } else {
                    $content_html .= $content_block;
                }

                $i++;
            }

            $html .= $content_html;
        } else {
            $html .= $content;
        }











        if (in_array('after', $content_position)) {

            $html .= do_shortcode('[related_post post_id="' . get_the_id() . '" view_type="' . $view_type . '" headline="' . $headline_text . '"]');
        }

        return $html;
    } else {
        return $content;
    }

    //var_dump($post_types_display);

}








add_action('the_excerpt', 'related_post_display_on_excerpt');

function related_post_display_on_excerpt($excerpt)
{

    $related_post_settings = get_option('related_post_settings');

    $post_types_display = isset($related_post_settings['post_types_display']) ? $related_post_settings['post_types_display'] : array();


    global $post;
    $posttype = isset($post->post_type) ? $post->post_type : '';
    $enable = isset($post_types_display[$posttype]['enable']) ? $post_types_display[$posttype]['enable'] : 'no';

    if ($enable == 'yes') {

        $excerpt_position = isset($post_types_display[$posttype]['excerpt_position']) ? $post_types_display[$posttype]['excerpt_position'] : [];
        $headline_text = isset($post_types_display[$posttype]['headline_text']) ? $post_types_display[$posttype]['headline_text'] : '';
        $view_type = isset($post_types_display[$posttype]['view_type']) ? $post_types_display[$posttype]['view_type'] : '';


        $html = '';

        if (in_array('before', $excerpt_position)) {

            $html .= do_shortcode('[related_post post_id="' . get_the_id() . '" view_type="' . $view_type . '" headline="' . $headline_text . '"]');
        }
        $html .= $excerpt;

        if (in_array('after', $excerpt_position)) {

            $html .= do_shortcode('[related_post post_id="' . get_the_id() . '" view_type="' . $view_type . '" headline="' . $headline_text . '"]');
        }


        return $html;
    } else {
        return $excerpt;
    }

    //var_dump($post_types_display);

}

add_action('comment_form_before', 'related_post_display_comment_form_before');

function related_post_display_comment_form_before($excerpt)
{

    $related_post_settings = get_option('related_post_settings');

    $post_types_display = isset($related_post_settings['post_types_display']) ? $related_post_settings['post_types_display'] : array();


    global $post;
    $posttype = isset($post->post_type) ? $post->post_type : '';
    $enable = isset($post_types_display[$posttype]['enable']) ? $post_types_display[$posttype]['enable'] : 'no';

    if ($enable == 'yes') {

        $comment_form_position = isset($post_types_display[$posttype]['comment_form_position']) ? $post_types_display[$posttype]['comment_form_position'] : [];
        $headline_text = isset($post_types_display[$posttype]['headline_text']) ? $post_types_display[$posttype]['headline_text'] : '';
        $view_type = isset($post_types_display[$posttype]['view_type']) ? $post_types_display[$posttype]['view_type'] : '';


        if (in_array('before', $comment_form_position)) {

            echo do_shortcode('[related_post post_id="' . get_the_id() . '" view_type="' . $view_type . '" headline="' . $headline_text . '"]');
        }
    }

    //var_dump($post_types_display);

}

add_action('comment_form_after', 'related_post_display_comment_form_after');

function related_post_display_comment_form_after($excerpt)
{

    $related_post_settings = get_option('related_post_settings');

    $post_types_display = isset($related_post_settings['post_types_display']) ? $related_post_settings['post_types_display'] : array();


    global $post;
    $posttype = isset($post->post_type) ? $post->post_type : '';
    $enable = isset($post_types_display[$posttype]['enable']) ? $post_types_display[$posttype]['enable'] : 'no';

    if ($enable == 'yes') {

        $comment_form_position = isset($post_types_display[$posttype]['comment_form_position']) ? $post_types_display[$posttype]['comment_form_position'] : [];
        $headline_text = isset($post_types_display[$posttype]['headline_text']) ? $post_types_display[$posttype]['headline_text'] : '';
        $view_type = isset($post_types_display[$posttype]['view_type']) ? $post_types_display[$posttype]['view_type'] : '';

        if (in_array('after', $comment_form_position)) {

            echo do_shortcode('[related_post post_id="' . get_the_id() . '" view_type="' . $view_type . '" headline="' . $headline_text . '"]');
        }
    }

    //var_dump($post_types_display);

}

















add_filter('wp_head', 'related_post_count_stats');


function related_post_count_stats()
{

    $related_post_settings = get_option('related_post_settings');
    $enable_stats = isset($related_post_settings['enable_stats']) ? $related_post_settings['enable_stats'] : 'disable';

    if ($enable_stats != 'enable') return;

    $gmt_offset = get_option('gmt_offset');
    $date = date('Y-m-d', strtotime('+' . $gmt_offset . ' hour'));


    if (is_singular() && !empty($_GET['related_post_from'])) {

        $to_id = get_the_id();
        $related_post_from = sanitize_text_field($_GET['related_post_from']);

        global $wpdb;
        $table = $wpdb->prefix . "related_post_stats";

        $wpdb->query($wpdb->prepare(
            "INSERT INTO $table 
									( id, from_id, to_id, date )
									VALUES	( %d, %d, %d, %s )",
            array('', $related_post_from, $to_id, $date)

        ));


        //echo '<pre>'.var_export($_GET).'</pre>';
    }
}





function related_post_is_archive_display($archives)
{


    if (is_front_page() && is_home()) {

        if (in_array('front_page', $archives)) {
            return true;
        }
    } elseif (is_front_page()) {
        if (in_array('home', $archives)) {
            return true;
        }
    } elseif (is_home()) {
        if (in_array('blog', $archives)) {
            return true;
        }
    } else if (is_tag()) {
        if (in_array('post_tag', $archives)) {
            return true;
        }
    } else if (is_category()) {
        if (in_array('category', $archives)) {
            return true;
        }
    } else if (is_tax()) {

        $queried_object = get_queried_object();
        $taxonomy = $queried_object->taxonomy;
        //echo '<pre>'.var_export($taxonomy, true).'</pre>';
        if (in_array($taxonomy, $archives)) {
            return true;
        }
    } else if (is_author()) {
        if (in_array('author', $archives)) {
            return true;
        }
    } else if (is_search()) {
        if (in_array('search', $archives)) {
            return true;
        }
    } else if (is_year()) {
        if (in_array('year', $archives)) {
            return true;
        }
    } else if (is_month()) {
        if (in_array('month', $archives)) {
            return true;
        }
    } else if (is_date()) {
        if (in_array('date', $archives)) {
            return true;
        }
    } else {
        return false;
    }
}

//add_filter('the_excerpt','related_post_excerpt_display_auto');


function related_post_excerpt_display_auto($excerpt)
{


    $post_id = get_the_ID();
    $post_type = get_post_type($post_id);
    $related_post_settings = get_option('related_post_settings');
    $display_auto = !empty($related_post_settings['display_auto']) ? $related_post_settings['display_auto'] : '';
    $archives = !empty($related_post_settings['archives']) ? $related_post_settings['archives'] : array();

    $post_types = !empty($related_post_settings['post_types']) ? $related_post_settings['post_types'] : array();
    $excerpt_positions = !empty($related_post_settings['excerpt_positions']) ? $related_post_settings['excerpt_positions'] : array();


    $is_archive_display = related_post_is_archive_display($archives);
    //echo '<pre>'.var_export($is_archive_display, true).'</pre>';
    //echo '<pre>'.var_export($display_auto, true).'</pre>';

    $html = '';

    if ($display_auto == 'yes' && $is_archive_display && in_array($post_type, $post_types) && in_array('before', $excerpt_positions)) {
        $html .= do_shortcode('[related_post post_id="' . $post_id . '"]');
    }

    $html .= $excerpt;

    if ($display_auto == 'yes' && $is_archive_display && in_array($post_type, $post_types) && in_array('after', $excerpt_positions)) {
        $html .= do_shortcode('[related_post post_id="' . $post_id . '"]');
    }

    return $html;
}





function related_post_ajax_get_post_ids()
{
    $response = array();
    if (! current_user_can('manage_options')) {

        $response['html'] = __("Sorry you are not allowed to do that", "related-post");
        echo json_encode($response);

        die();
    }

    $post_id     = isset($_POST['post_id']) ? (int)sanitize_text_field($_POST['post_id']) : '';
    $title     = isset($_POST['title']) ? sanitize_text_field($_POST['title']) : '';
    $any_posttypes     = isset($_POST['any_posttypes']) ? sanitize_text_field($_POST['any_posttypes']) : '';

    $post_type = get_post_type($post_id);
    $args = array('post_type' => !empty($any_posttypes) ? 'any' : array($post_type), 's' => $title, 'post__not_in' => array($post_id), 'posts_per_page' => -1, 'post_status' => 'publish',);
    $wp_query = new WP_Query($args);

    ob_start();

    if ($wp_query->have_posts()) :

        while ($wp_query->have_posts()) : $wp_query->the_post();

            $post_id = get_the_id();
            $post_title = get_the_title();

?>
            <div post_id="<?php echo $post_id; ?>" post_title="<?php echo $post_title; ?>" class="item">
                <span class="icon-plus"><i class="far fa-plus-square"></i></span>
                <span class="icon-add"><i class="fas fa-plus-square"></i></span>
                <span class="title-text"><?php echo $post_title; ?></span>
            </div>
<?php

        endwhile;
        wp_reset_postdata();

    endif;

    $response['html'] = ob_get_clean();

    echo json_encode($response);

    die();
}

add_action('wp_ajax_related_post_ajax_get_post_ids', 'related_post_ajax_get_post_ids');






function pprp_post_ids_by_tax_terms($post_id = 0)
{

    $post_id = !empty($post_id) ? $post_id : get_the_ID();
    $post_ids = array();
    $post_type = get_post_type($post_id);
    $taxonomy_terms = related_post_get_taxonomy_terms($post_id);

    if (!empty($taxonomy_terms)) {
        foreach ($taxonomy_terms as $taxonomy => $term_ids) {
            foreach ($term_ids as $term_id) {
                $wp_query = new WP_Query(
                    array(
                        'post_type' => $post_type,
                        'post_status' => 'publish',
                        'tax_query' => array(
                            array(
                                'taxonomy' => $taxonomy,
                                'field' => 'id',
                                'terms' => $term_id,
                            )
                        )
                    )
                );

                if ($wp_query->have_posts()) :
                    $i = 0;
                    while ($wp_query->have_posts()) : $wp_query->the_post();
                        $post_ids[$i] = get_the_ID();
                        $i++;
                    endwhile;
                    wp_reset_postdata();
                endif;
            }
        }

        //remove current post id

        $current_post_id = array(get_the_ID());
        $post_ids = array_diff($post_ids, $current_post_id);
    }



    //var_dump($post_ids);

    return $post_ids;
}



function related_post_get_taxonomy_terms($post_id)
{



    // get post by post id
    $post = get_post($post_id);

    // get post type by post
    $post_type = $post->post_type;

    // get post type taxonomies
    $taxonomies = get_object_taxonomies($post_type);
    $post_taxonomies_terms = array();

    if (!empty($taxonomies))
        foreach ($taxonomies as $taxonomy) {



            // get the terms related to post
            $terms = get_the_terms($post->ID, $taxonomy);
            if (!empty($terms)) {
                $i = 0;
                foreach ($terms as $term) {
                    $post_taxonomies_terms[$taxonomy][$i] = $term->term_id;
                    $i++;
                }
            }
        }

    return $post_taxonomies_terms;
}