add_action( 'after_setup_theme', 'child_theme_setup', 20 );

function child_theme_setup() {
    remove_shortcode( 'blog' );
    add_shortcode( 'blog', 'my_blog' );
}

function my_blog($attributes, $content = null) {
    $attributes = shortcode_atts(
        array(
            'posts' => 6,
            'category' => null,
            'ajax' => 0,
        ), $attributes);

    if (is_numeric($attributes['posts']) AND $attributes['posts'] > 0)
    {
        $attributes['posts'] = ceil($attributes['posts']);
    } else
    {
        $attributes['posts'] = 6;
    }

    $args = array(
        'post_status' => 'publish,future',
        'post_type' => 'post',
        'posts_per_page' => $attributes['posts'],
        'post__not_in' => get_option('sticky_posts')
    );

    if ( ! empty($attributes['category'])) {
        $args['category_name'] = $attributes['category'];
    }

    $posts = new WP_Query($args);
    $max_num_pages = $posts->max_num_pages;

    $output =   '<div class="w-blog imgpos_atleft more_hidden">
                    <div class="w-blog-h">
                        <div class="w-blog-list">';

    while($posts->have_posts())
    {
        $posts->the_post();

        if (has_post_thumbnail()) {
            $the_thumbnail = wp_get_attachment_image_src(get_post_thumbnail_id(), 'blog-list');
            $the_thumbnail = $the_thumbnail[0];
        } else {
            $the_thumbnail =  get_template_directory_uri() .'/img/placeholder/500x500.gif';
        }

        $output .=          '<div class="w-blog-entry">
                                <div class="w-blog-entry-h">
                                    <a class="w-blog-entry-link" href="'.get_permalink(get_the_ID()).'">
                                        <div class="w-blog-entry-preview">
                                            <img src="'.$the_thumbnail.'" alt="">
                                        </div>

                                        <h2 class="w-blog-entry-title">
                                            <span class="w-blog-entry-title-h">'.get_the_title().'</span>
                                        </h2>
                                    </a>
                                    <div class="w-blog-entry-body">
                                        <div class="w-blog-entry-meta">
                                            <div class="w-blog-entry-meta-date">
                                                <span class="w-blog-entry-meta-date-month">'.get_the_date('M').'</span>
                                                <span class="w-blog-entry-meta-date-day">'.get_the_date('d').'</span>
                                                <span class="w-blog-entry-meta-date-year">'.get_the_date('Y').'</span>
                                            </div>

                                            <div class="w-blog-entry-meta-comments">
                                                <a class="w-blog-entry-meta-comments-h" href="'.get_permalink(get_the_ID()).'#comments"><i class="fa fa-comments"></i>'.get_comments_number().'</a>
                                            </div>
                                        </div>

                                        <div class="w-blog-entry-short">
                                            '.apply_filters('the_excerpt', get_the_excerpt()).'
                                        </div>

                                    </div>
                                </div>
                            </div>';
    }

    $output .=          '</div>
                    </div>
                </div>';

    if ($max_num_pages > 1 AND $attributes['ajax'] == 1) {
        $output .=
'<script type="text/javascript">
var page = 1,
max_page = '.$max_num_pages.'
jQuery(document).ready(function(){
jQuery("#blog_load_more").click(function(){
    jQuery(this).hide();
    jQuery("#spinner").show();
    jQuery.ajax({
        type: "POST",
        url: "'.admin_url('admin-ajax.php').'",
        data: {
            action: "blogPagination",
            page: page+1,
            per_page: '.$attributes['posts'].'
        },
        success: function(data, textStatus, XMLHttpRequest){
            page++;
            jQuery(".w-blog-list").append(data);
            jQuery("#spinner").hide();
            if (max_page > page) {
                jQuery("#blog_load_more").show();
            }
            jQuery(window).resize();
        },
        error: function(MLHttpRequest, textStatus, errorThrown){
            jQuery("#spinner").hide();
            jQuery(this).show();
        }
    });
});
});
</script>
<div class="w-blog-load">
<a href="javascript:void(0);" id="blog_load_more" class="g-btn type_default size_small"><span>'.__('Load More Posts', 'us').'</span></a>
<img id="spinner" src="'.get_template_directory_uri().'/img/loader.gif" alt="loading..." style="display: none;">
</div>';
    }

    return $output;
}

if ( ! function_exists('blogAjaxPagination'))
{
    function blogAjaxPagination() {
        global $smof_data, $us_thumbnail_size;

        if (isset($_POST['page']) AND $_POST['page'] > 1)
        {
            $page = $_POST['page'];
        }
        else
        {
            return;
        }

        $posts = new WP_Query();

        $lang_param = $per_page_param = '';

        if (defined('ICL_LANGUAGE_CODE'))
        {
            $lang_param = '&lang=' . ICL_LANGUAGE_CODE;
        }

        if (isset($_POST['per_page'])) {
            $per_page_param = '&posts_per_page='.$_POST['per_page'];
        }

        $posts->query('paged='.$page.'&post_type=post&post_status=publish,future'.$per_page_param.$lang_param);

        $output = '';

        while($posts->have_posts())
        {
            $posts->the_post();

            if (has_post_thumbnail()) {
                $the_thumbnail = wp_get_attachment_image_src(get_post_thumbnail_id(), 'blog-list');
                $the_thumbnail = $the_thumbnail[0];
            } else {
                $the_thumbnail =  get_template_directory_uri() .'/img/placeholder/500x500.gif';
            }

            $output .=          '<div class="w-blog-entry">
                                    <div class="w-blog-entry-h">
                                        <a class="w-blog-entry-link" href="'.get_permalink(get_the_ID()).'">
                                            <div class="w-blog-entry-preview">
                                                <img src="'.$the_thumbnail.'" alt="">
                                            </div>

                                            <h2 class="w-blog-entry-title">
                                                <span class="w-blog-entry-title-h">'.get_the_title().'</span>
                                            </h2>
                                        </a>
                                        <div class="w-blog-entry-body">
                                            <div class="w-blog-entry-meta">
                                                <div class="w-blog-entry-meta-date">
                                                    <span class="w-blog-entry-meta-date-month">'.get_the_date('M').'</span>
                                                    <span class="w-blog-entry-meta-date-day">'.get_the_date('d').'</span>
                                                    <span class="w-blog-entry-meta-date-year">'.get_the_date('Y').'</span>
                                                </div>

                                                <div class="w-blog-entry-meta-comments">
                                                    <a class="w-blog-entry-meta-comments-h" href="'.get_permalink(get_the_ID()).'#comments"><i class="fa fa-comments"></i>'.get_comments_number().'</a>
                                                </div>
                                            </div>

                                            <div class="w-blog-entry-short">
                                                '.apply_filters('the_excerpt', get_the_excerpt()).'
                                            </div>

                                        </div>
                                    </div>
                                </div>';
        }

        echo $output;

        die();

    }

    add_action( 'wp_ajax_nopriv_blogPagination', 'blogAjaxPagination' );
    add_action( 'wp_ajax_blogPagination', 'blogAjaxPagination' );
}