pagination.php

<?php
namespace Unilever\ATH\Theme;

if ( ! function_exists( 'add_action' ) ) {
    exit(0);
}

class Pagination
{
    /**
     * args
     *
     * @since 0.0.1
     * @var array
     */
    private $args = array();

    /**
     * WP_Query wordpress
     *
     * @since 0.0.1
     * @var object
     */
    private $wp_query;

    public function __construct( $args = array(), $attrs = array() )
    {
        $defaults = array(
            'template'        => '',
            'class_container' => '',
            'class_button'    => 'btn-s',
            'class_title'     => 'btn-s-text',
            'title'           => __( 'Show More', App::TEXTDOMAIN ),
            'paged'           => 1,
            'lazyload'        => 3,
            'show_always'     => false,
            'query'           => null,
            'wait'            => __( 'Wait...', App::TEXTDOMAIN ),
        );

        $this->initialize( wp_parse_args( $args, $defaults ), $attrs );
    }

    public function initialize( $args, $attrs = array() )
    {
        $this->args = $args;
        $this->set_query();

        if ( ! $this->is_pages() )
            return;

        $this->render( $attrs );
    }

    public function set_query()
    {
        global $wp_query;

        if ( is_null( $this->args['query'] ) ) {
            $this->args['query'] = $wp_query;
        }

        $this->wp_query = $this->args['query'];
    }

    public function is_pages()
    {
        return ( $this->wp_query->max_num_pages > 1 || $this->args['show_always'] );
    }

    public function render( $attrs = array() )
    {
        $defaults = array(
            'data-query'         => json_encode( $this->wp_query->query ),
            'data-max'           => $this->wp_query->max_num_pages,
            'data-paged'         => $this->args['paged'],
            'data-template'      => $this->args['template'],
            'data-load-more'     => $this->args['lazyload'],
            'class'              => $this->args['class_container'],
            'style'              => ( $this->wp_query->max_num_pages <= 1 ) ? 'display:none' : '',
            'data-label-wait'    => $this->args['wait'],
            'data-label-trigger' => $this->args['title'],
        );

        $attrs = wp_parse_args( $attrs, $defaults );

        ?>
        <div data-component="paginator" <?php echo $this->get_attr_html( $attrs ); ?>>
            <a class="<?php echo esc_attr( $this->args['class_button'] ); ?>" data-action="next-page" data-element="trigger" href="javascript:void(0);">
                <span class="<?php echo esc_attr( $this->args['class_title'] ); ?>"><?php echo esc_html( $this->args['title'] ); ?></span>
            </a>
        </div>
        <?php
    }

    public function get_attr_html( $attrs )
    {
        $fields = array();

        foreach ( $attrs as $attr => $value ) {
            $fields[] = "{$attr}='{$value}'";
        }

        return implode( ' ', $fields );
    }

}