<?php


/**
 * Custom paginations for this theme.
 *
 * Eventually, some of the functionality here could be replaced by core features.
 *
 * @package techland
*/


/*************************************************
##  next post css class
*************************************************/


function techland_posts_next_pag_attrs()
{
    return 'class="nt-pagination-link -next"';
}
add_filter('next_posts_link_attributes', 'techland_posts_next_pag_attrs');


/*************************************************
##  prev post css class
*************************************************/


function techland_posts_prev_pag_attrs()
{
    return 'class="nt-pagination-link -previous"';
}
add_filter('previous_posts_link_attributes', 'techland_posts_prev_pag_attrs');


/*************************************************
##  SINLGE POST/CPT NAVIGATION - Display navigation to next/previous post when applicable.
*************************************************/


if (! function_exists('techland_single_navigation')) {
    function techland_single_navigation()
    {
        if ('0' != techland_settings('single_navigation_visibility')) {

    // Don't print empty markup if there's nowhere to navigate.
            $previous = (is_attachment()) ? get_post(get_post()->post_parent) : get_adjacent_post(false, '', true);
            $next  = get_adjacent_post(false, '', false);

            if (! $next && ! $previous) {
                return;
            } ?>

	<div class="single-post-navigation pt-3 pt-md-6 pt-lg-12">

	<!-- Project Pager -->
	<nav class="nt-single-navigation -style-centered">
    	<ul class="nt-single-navigation-inner">

        	<li class="nt-single-navigation-item -prev">
	           <?php previous_post_link('%link', _x('PREVIOUS POST', 'Previous post link', 'techland')); ?>
        	</li>

        	<li class="nt-single-navigation-item -next">
    	       <?php next_post_link('%link', _x('NEXT POST', 'Next post link', 'techland')); ?>
        	</li>

    	</ul>
	</nav>
	<!-- Project Pager End -->
	</div>

	<?php
        }
    }
}

/*************************************************
##  SINLGE POST/CPT NAVIGATION 2 - Display navigation to next/previous post when applicable.
*************************************************/


if (! function_exists('techland_single_navigation_two')) {
    function techland_single_navigation_two()
    {
        if ('1' == techland_settings('single_navigation_visibility','0')) {

    // Don't print empty markup if there's nowhere to navigate.

            $prevPost = get_previous_post(true);
            $prevthumbnail = $prevPost ? get_the_post_thumbnail($prevPost->ID, array(100,100) ) : '';
            $prevclass = $prevPost ? '' : '12';
            $nextPost = get_next_post(true);
            $nextthumbnail = $nextPost ? get_the_post_thumbnail($nextPost->ID, array(100,100) ) : '';
            $nextclass = $nextPost ? '6' : '12';
        ?>

            <div class="single-post-nav pt-3 pt-md-6 pt-lg-12">

                <div class="row align-items-sm-center justify-content-sm-between">

                    <?php if ( $prevPost ) : ?>
                        <div class="col-6 col-sm-<?php echo esc_attr($nextclass); ?> mb-4 text-left">
                            <div class="__thumb circled">
                                <?php previous_post_link('%link',$prevthumbnail, TRUE); ?>
                            </div>
                            <div class="mt-3">
                                <h6 class="__title __prev"><?php previous_post_link('%link',"<< Prev Post", TRUE); ?></h6>
                            </div>
                        </div>
                    <?php endif; ?>

                    <?php if ( $nextPost ) : ?>
                        <div class="col-6 col-sm-<?php echo esc_attr($prevclass); ?> mb-4 text-right">

                            <div class="__thumb circled">
                                <?php next_post_link('%link',$nextthumbnail, TRUE); ?>
                            </div>
                            <div class="mt-3">
                                <h6 class="__title __next"><?php next_post_link('%link',"Next Post >>", TRUE); ?></h6>
                            </div>
                        </div>
                    <?php endif; ?>

                </div><!--row -->

            </div>

	<?php
        }
    }
}


/*************************************************
## POST PAGINATION - Display post navigation to next/previous post when applicable.
*************************************************/

function techland_index_loop_pagination()
{
    if ('0' !=  techland_settings('pagination_visibility', '1')) {
        $pag_class= array();
        $pag_class[] = ('yes' == techland_settings('pag_group')) ? '-group' : '';
        $pag_class[] = '-style-'.techland_settings('pag_type', 'outline');
        $pag_class[] = '-size-'.techland_settings('pag_size', 'medium');
        $pag_class[] = '-corner-'.techland_settings('pag_corner', 'circle');
        $pag_class[] = '-align-'.techland_settings('pag_align', 'center');
        $pag_class = implode(' ', $pag_class);

        $prev = get_previous_posts_link('<i class="nt-pagination-icon fa fa-angle-left" aria-hidden="true"></i>');
        $next = get_next_posts_link('<i class="nt-pagination-icon fa fa-angle-right" aria-hidden="true"></i>');

        if (is_singular()) {
            return;
        }

        global $wp_query;

        /** Stop execution if there's only 1 page */
        if ($wp_query->max_num_pages <= 1) {
            return;
        }

        $paged = get_query_var('paged') ? absint(get_query_var('paged')) : 1;
        $max = intval($wp_query->max_num_pages);

        /** Add current page to the array */
        if ($paged >= 1) {
            $links[] = $paged;
        }

        /** Add the pages around the current page to the array */
        if ($paged >= 3) {
            $links[] = $paged - 1;
            $links[] = $paged - 2;
        }

        if (($paged + 2) <= $max) {
            $links[] = $paged + 2;
            $links[] = $paged + 1;
        }

        echo "<div class='mt-6 mt-md-9 mt-lg-12 justify-content-sm-center nt-pagination ".esc_attr($pag_class)." '>
    <ul class='nt-pagination-inner'>" . "\n";

        /** Previous Post Link */
        if (get_previous_posts_link()) {
            echo '<li class="nt-pagination-item">' . wp_kses($prev, techland_allowed_html()) . '</li>';
        }

        /** Link to first page, plus ellipses if necessary */
        if (! in_array(1, $links)) {
            $class = 1 == $paged ? ' active' : '';

            printf('<li class="nt-pagination-item%s" ><a class="nt-pagination-link" href="%s">%s</a></li>' . "\n", $class, esc_url(get_pagenum_link(1)), '1');

            if (! in_array(2, $links)) {
                echo '<li class="nt-pagination-item">…</li>';
            }
        }

        /** Link to current page, plus 2 pages in either direction if necessary */
        sort($links);
        foreach ((array) $links as $link) {
            $class = $paged == $link ? ' active' : '';
            printf('<li class="nt-pagination-item%s" ><a class="nt-pagination-link" href="%s">%s</a></li>' . "\n", $class, esc_url(get_pagenum_link($link)), $link);
        }

        /** Link to last page, plus ellipses if necessary */
        if (! in_array($max, $links)) {
            if (! in_array($max - 1, $links)) {
                echo '<li class="nt-pagination-item">…</li>' . "\n";
            }

            $class = $paged == $max ? ' active' : '';
            printf('<li class="nt-pagination-item%s" ><a class="nt-pagination-link" href="%s">%s</a></li>' . "\n", $class, esc_url(get_pagenum_link($max)), $max);
        }

        /** Next Post Link */
        if (get_next_posts_link()) {
            echo '<li class="nt-pagination-item">' . wp_kses($next, techland_allowed_html()) . '</li>';
        }

        echo '</ul></div>' . "\n";
    }
}


/*************************************************
##  LINK PAGES CURRENT CLASS
*************************************************/


function techland_current_link_pages($link)
{
    if (ctype_digit($link)) {
        return '<span class="current">' . $link . '</span>';
    }

    return $link;
}
add_filter('wp_link_pages_link', 'techland_current_link_pages');


/*************************************************
##  LINK PAGES
*************************************************/


if (! function_exists('techland_wp_link_pages')) {
    function techland_wp_link_pages()
    {

        // pagination for page links
        wp_link_pages(array(

            'before' => '<div class="page-links"><span class="page-links-title">' . esc_html__('Pages', 'techland') . '</span>',
            'after' => '</div>',
            'link_before' => '',
            'link_after' => '',
            'next_or_number' => 'number',
            'separator' => ' ',
            'nextpagelink' => esc_html__('Next page', 'techland'),
            'previouspagelink' => esc_html__('Previous page', 'techland'),
            'pagelink' => '%',
            'echo' => 1

        ));
    }
}