<?php
/**
 * Walker class for for dropdown menu with latest posts
 * Add posts if 'latest_posts' field is set to 'Add'
 * and only for parent category.
 *
 *
 * 1. Query to retriev the caetegory drop down
 * 2. Menu Walker Class which builds the drop down
 *
 *
 * @package SimpleMag
 * @since 	SimpleMag 4.0
 *
**/



/**
 * Query to retriev the caetegory drop down
**/
function ajax_mega_menu_get_posts( $taxonomy ) {

    // Verify nonce
    if( ! isset( $_POST['ti_nonce'] ) || ! wp_verify_nonce( $_POST['ti_nonce'], 'ti_nonce' ) ) {
        die( 'Permission denied' );
    }


    $taxonomy = $_POST['taxonomy'];


    /**
     * Show posts from the category
    **/
    $menu_cat_posts = new WP_Query(
        array(
            'category_name'     => $taxonomy,
            'post_type'         => 'post',
            'post_status'       => 'publish',
            'posts_per_page'    => 3,
            'no_found_rows' => true,
        )
    );

    if ( $menu_cat_posts->have_posts() ) :

        echo '<ul class="mega-menu-posts">';

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

                echo '<li class="mega-menu-item">';

                        echo '<figure><a href="' . get_the_permalink() . '">';
                        if ( has_post_thumbnail() ) {
                            the_post_thumbnail( 'rectangle-size' );
                        } elseif( first_post_image() ) { // Set the first image from the editor
                            echo '<img src="' . esc_url( first_post_image() ) . '" class="wp-post-image" alt="' . esc_attr( get_the_title() ) . '" />';
                        } else {
                            echo '<img class="alter" src="' . get_template_directory_uri() . '/images/pixel.gif" alt="' . esc_attr( get_the_title() ) . '" />';
                        }
                        echo '</a></figure>';

                        echo '<div class="item-title"><a href="' . get_the_permalink() . '">' . get_the_title() . '</a></div>';

                echo '</li>';

            endwhile;

            wp_reset_postdata();

        echo '</ul>';

    else:

        echo '<small>' . __( 'Add some posts to this category', 'themetext' ) . '</small>';

    endif;

  die();

}

add_action('wp_ajax_filter_posts', 'ajax_mega_menu_get_posts');
add_action('wp_ajax_nopriv_filter_posts', 'ajax_mega_menu_get_posts');



/**
 * Menu Walker Class which builds the drop down
**/
class TI_Menu extends Walker_Nav_Menu {

    function start_lvl(&$output, $depth = 0, $args = array() ) {
        $indent = str_repeat("\t", $depth);
        $output .= "\n$indent<ul class=\"sub-links\">\n";
    }

    function end_lvl(&$output, $depth = 0, $args = array()) {
        $indent = str_repeat("\t", $depth);
        $output .= "$indent</ul>\n";
    }

    function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {

        global $ti_option;
        $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
		$class_names = $value = '';
		$classes = empty( $item->classes ) ? array() : (array) $item->classes;
		$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) );
		$class_names = ' class="' . esc_attr( $class_names ) . '"';
        $output .= $indent . '<li id="menu-item-'. $item->ID . '"' . $value . $class_names .'>';

        //$attributes  = ( 'category' == $item->object ) ? ' data-category="'  . esc_attr( $item->url ) .'"' : '';
        $attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
        $attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
        $attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
        $attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';

        $item_output = $args->before;

        $item_output .= '<a'. $attributes . '>';
        $item_output .= '<span>';
        $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
		$item_output .= '</span>';
        $item_output .= '</a>';

		if ( $ti_option['site_mega_menu'] == true ) {
			if ( 'category' == $item->object ){
				$item_output  .= '<div class="sub-menu">';
			}
		}

        $item_output .= $args->after;


		/**
         * Mega Menu:
         * 1. Ajax
         * 2. Regular
         *
		 * If the option is enabled in Theme Options
        **/
        if ( $ti_option['site_mega_menu'] == true ) :

            if ( $depth == 0 && $item->object == 'category' ) :


                /**
                 * AJAX Menu
                **/
                if ( $ti_option['site_mega_menu_type'] == 'menu_ajax' ) :


                    $item_output .= '<div class="sub-posts">';
                        $item_output .= '<div class="clearfix mega-menu-container mega-menu-ajax"></div>';
                    $item_output .= '</div>';


                /**
                 * Regular Menu
                **/
                else :

                    $item_output .= '<div class="sub-posts">';

                        $item_output .= '<div class="mega-menu-container">';

                            global $post;
                            $menuposts = get_posts( array(
                                    'posts_per_page' => 3,
                                    'category' => $item->object_id,
                                    'no_found_rows' => true,
                                )
                            );

                            //$item_output .= '<a href="" class="mega-menu-posts-title alignleft">' . get_cat_name( $item->object_id ) . '</a>';


                            $item_output .= '<ul class="mega-menu-posts">';

                                foreach( $menuposts as $post ):

                                    $post_title = get_the_title();
                                    $post_link = get_permalink();
                                    $post_image = wp_get_attachment_image_src( get_post_thumbnail_id(), 'rectangle-size' );

                                    if ( $post_image != '' ){
                                        $menu_post_image = '<img src="' . esc_url( $post_image[0] ) . '" alt="' . esc_attr( $post_title ) . '" width="' . esc_attr( $post_image[1] ) . '" height="' . esc_attr( $post_image[2] ) . '" />';
                                    } elseif( first_post_image() ) {
                                        $menu_post_image = '<img src="' . esc_url( first_post_image() ) . '" class="wp-post-image" alt="' . esc_attr( $post_title ) . '" />';
                                    } else {
                                        $menu_post_image = __( 'No image','themetext');
                                    }

                                    $item_output .= '
                                        <li class="mega-menu-item">
                                            <figure>
                                                <a href="' . esc_url( $post_link ) . '">' . $menu_post_image . '</a>
                                            </figure>
                                            <div class="item-title">
                                                <a href="' . esc_url( $post_link ) . '">' .esc_html( $post_title ) . '</a>
                                            </div>
                                        </li>';

                                endforeach;

                                wp_reset_postdata();

                            $item_output .= '</ul>';

                        $item_output .= '</div>';

                    $item_output .= '</div>';

                endif;

            endif;

        endif;

        $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
    }


    function end_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {

		global $ti_option;
		if ( $ti_option['site_mega_menu'] == true ) {
			if ( 'category' == $item->object ){
				$output .= "</div>\n";
			}
		}

		$output .= "</li>\n";
    }

}