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<?php

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add_action( 'init', 'herald_add_mega_menu_support' );

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/* Add support for our built in mega menu system */

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if ( !function_exists( 'herald_add_mega_menu_support' ) ):

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function herald_add_mega_menu_support() {

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if ( herald_get_option( 'mega_menu' ) ) {

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add_filter( 'wp_edit_nav_menu_walker', 'herald_edit_menu_walker', 10, 2 );

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add_filter( 'wp_setup_nav_menu_item', 'herald_add_custom_nav_fields' );

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add_action( 'wp_update_nav_menu_item', 'herald_update_custom_nav_fields', 10, 3 );

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add_filter( 'nav_menu_css_class', 'herald_add_class_to_menu', 10, 2 );

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}

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}

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endif;

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/* Add custom fields to menu */

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if ( !function_exists( 'herald_add_custom_nav_fields' ) ):

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function herald_add_custom_nav_fields( $menu_item ) {

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$menu_item->mega_menu_cat = get_post_meta( $menu_item->ID, '_herald_mega_menu_cat', true ) ? 1 : 0;

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$menu_item->mega_menu = get_post_meta( $menu_item->ID, '_herald_mega_menu', true ) ? 1 : 0;

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return $menu_item;

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}

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endif;

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/* Save custom fiedls to menu */

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if ( !function_exists( 'herald_update_custom_nav_fields' ) ):

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function herald_update_custom_nav_fields( $menu_id, $menu_item_db_id, $args ) {

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if ( $args['menu-item-object'] == 'category' ) {

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$value = isset( $_REQUEST['menu-item-mega-menu-cat'][$menu_item_db_id] ) ? 1 : 0;

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update_post_meta( $menu_item_db_id, '_herald_mega_menu_cat', $value );

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} else {

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$value = isset( $_REQUEST['menu-item-mega-menu'][$menu_item_db_id] ) ? 1 : 0;

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update_post_meta( $menu_item_db_id, '_herald_mega_menu', $value );

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}

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}

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endif;

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/* Display our fields in admin */

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if ( !function_exists( 'herald_edit_menu_walker' ) ):

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function herald_edit_menu_walker( $walker, $menu_id ) {

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class herald_Walker_Nav_Menu_Edit extends Walker_Nav_Menu_Edit {

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

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$temp_output = '';

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$mega_menu_html = '';

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if($depth == 0 ){

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if ( $item->object == 'category' ) {

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$mega_menu_html .= '<p class="field-custom description description-wide">

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<input type="checkbox" id="edit-menu-item-mega-'.$item->db_id.'" class="widefat code edit-menu-item-custom" name="menu-item-mega-menu-cat['.$item->db_id.']" value="1" '.checked( $item->mega_menu_cat, 1, false ). ' />

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'.esc_html__( 'Mega Menu (display posts from category)', 'herald' ).'</label>

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</p>';

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} else {

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$mega_menu_html .= '<p class="field-custom description description-wide">

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<input type="checkbox" id="edit-menu-item-mega-'.$item->db_id.'" class="widefat code edit-menu-item-custom" name="menu-item-mega-menu['.$item->db_id.']" value="1" '.checked( $item->mega_menu, 1, false ). ' />

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'.esc_html__( 'Mega Menu (classic)', 'herald' ).'

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</label></p>';

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}

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}

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parent::start_el( $temp_output, $item, $depth, $args, $id );

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$temp_output = preg_replace( '/(?=<div.*submitbox)/', $mega_menu_html, $temp_output );

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$output .= $temp_output;

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}

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}

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return 'herald_Walker_Nav_Menu_Edit';

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}

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endif;

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/* Add class to menu item when mega menu is detected */

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if ( !function_exists( 'herald_add_class_to_menu' ) ):

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function herald_add_class_to_menu( $classes, $item ) {

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if ( $item->object == 'category' && !$item->menu_item_parent && isset( $item->mega_menu_cat ) && $item->mega_menu_cat ) {

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$classes[] = 'herald-mega-menu';

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}

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if ( !$item->menu_item_parent && isset( $item->mega_menu ) && $item->mega_menu ) {

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$classes[] = 'herald-mega-menu';

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$classes[] = 'herald-mega-menu-classic';

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}

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return $classes;

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}

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endif;

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/* Output category mega menu */

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if ( !function_exists( 'herald_load_mega_menu' ) ) :

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function herald_load_mega_menu( $cat_id ) {

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global $wp_query;

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$output = '';

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$ppp = herald_get_option('mega_menu_limit');

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$sub_cat_nav = herald_get_option('mega_menu_sub_cat');

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$layout = herald_get_option('mega_menu_layout');

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$sub_cats = array();

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if ( $sub_cat_nav ) {

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$sub_cats = get_categories( array( 'parent' => $cat_id, 'hide_empty' => false ) );

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}

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$has_sub_cats = $sub_cat_nav && !empty($sub_cats) ? true : false;

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$section_class = $has_sub_cats ? '' : 'herald-no-sid';

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$wrap_class = $has_sub_cats ? 'col-lg-9' : 'col-lg-12';

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//html start

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$output .= '<li class="container herald-section '.$section_class.'"><div class="row">';

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//sub cats

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if( $has_sub_cats ){

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$output .= '<div class="col-lg-3 herald-mega-menu-sub-cats"><ul>';

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foreach ( $sub_cats as $cat ) {

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$cat_link = get_category_link( $cat );

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$output .= '<li><a href="'.esc_url( $cat_link ).'">'.$cat->name.'</a></li>';

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}

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

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}

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//posts

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$output .= '<div class="herald-module '.$wrap_class.'"><div class="row row-eq-height">';

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if( $has_sub_cats ){

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herald_set_img_flag('sid');

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} else {

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herald_set_img_flag('full');

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}

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$args = array(

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'post_type' => 'post',

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'cat' => $cat_id,

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'posts_per_page' => $ppp

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);

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$wp_query = new WP_Query( $args );

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ob_start();

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if ( have_posts() ) :

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while ( have_posts() ) : the_post();

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get_template_part( 'template-parts/layouts/content-'.$layout );

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endwhile;

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endif;

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wp_reset_query();

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herald_set_img_flag('');

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$output .= ob_get_clean();

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

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

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return $output;

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}

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endif;

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/* Mega menu walker */

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class herald_Menu_Walker extends Walker_Nav_menu

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{

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

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if ( herald_get_option( 'mega_menu' ) ) {

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if ( $depth == 0 && ( $item->mega_menu_cat ) ) {

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$output .= '<ul class="sub-menu">';

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$output .= herald_load_mega_menu( $item->object_id );

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$output .= '</ul>';

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}

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}

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}

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}

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