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Edit File: WooCommerce.class.php

<?php
if ( !defined( 'ABSPATH' ) ) exit;

if ( !class_exists( 'ewdufaqWooCommerce' ) ) {
	/**
	 * Class to handle WooCommerce integration for Ultimate FAQs
	 *
	 * @since 2.0.0
	 */
	class ewdufaqWooCommerce {

public function __construct() {

add_action( 'admin_enqueue_scripts', array( $this, 'admin_enqueue' ) );

add_filter( 'woocommerce_product_data_tabs', array( $this, 'add_admin_product_page_faq_tab' ), 10, 1 );
			add_action( 'woocommerce_product_data_panels', array( $this, 'add_admin_product_page_faqs' ) );

add_action( 'wp_ajax_ewd_ufaq_add_wc_faqs', array( $this, 'add_wc_faqs' ) );
			add_action( 'wp_ajax_ewd_ufaq_delete_wc_faqs', array( $this, 'delete_wc_faqs' ) );
			add_action( 'wp_ajax_ewd_ufaq_wc_faq_category', array( $this, 'wc_faq_category' ) );

add_action( 'plugins_loaded', array( $this, 'set_faq_display_hook' ) );
		}

/**
		 * Add the correct hook to display the created WC FAQs
		 * @since 2.0.0
		 */
		public function set_faq_display_hook() {
			global $ewd_ufaq_controller;

if ( empty( $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs-location' ) ) or $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs-location' ) == 'tabs' ) { add_filter( 'woocommerce_product_tabs', array( $this, 'add_woocommerce_tab' ) ); }
			elseif ( $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs-location' ) == 'before_add_to_cart' ) { add_action( 'woocommerce_before_add_to_cart_button', array( $this, 'faq_content' ) ); }
			elseif ( $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs-location' ) == 'after_add_to_cart' ) { add_action( 'woocommerce_after_add_to_cart_button', array( $this, 'faq_content' ) ); }
			elseif ( $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs-location' ) == 'after_product_summary' ) { add_action( 'woocommerce_after_single_product_summary', array( $this, 'faq_content' ) ); }
			elseif ( $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs-location' ) == 'after_product' ) { add_action( 'woocommerce_after_single_product', array( $this, 'faq_content' ) ); }
		}

/**
		 * Adds an FAQ tab to WooCommerce
		 * @since 2.0.0
		 */
		public function add_woocommerce_tab( $tabs ) {
			global $product;
			global $ewd_ufaq_controller;

if ( ! $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs' ) ) { return $tabs; }

$product_post = ( $ewd_ufaq_controller->settings->get_setting( 'woocommerce-use-product' ) and is_object( $product ) ) ? get_post( $product->get_id() ) : get_post( get_the_id() );
		
			$ufaq_product_category = get_term_by( 'name', $product_post->post_title, EWD_UFAQ_FAQ_CATEGORY_TAXONOMY );
		
			$wc_cats = get_the_terms( $product_post, 'product_cat' );

$ufaq_wccat_category = false;

if ( $wc_cats ) {

foreach ( $wc_cats as $wc_cat ) {

if ( get_term_by( 'name', $wc_cat->name, EWD_UFAQ_FAQ_CATEGORY_TAXONOMY ) ) { $ufaq_wccat_category = true; }
				}
			}
		
			$current_faqs = is_array( get_post_meta( $product_post->ID, 'EWD_UFAQ_WC_Selected_FAQs', true ) ) ? get_post_meta( $product_post->ID, 'EWD_UFAQ_WC_Selected_FAQs', true ) : array();
		
			if ( ( $ufaq_product_category or $ufaq_wccat_category or ! empty( $current_faqs ) ) ) {

$tabs['faq_tab'] = array(
					'title' 	=> $ewd_ufaq_controller->settings->get_setting( 'label-woocommerce-tab' ),
					'priority' 	=> 50,
					'callback' 	=> array( $this, 'faq_content' )
				);
		
			}

return $tabs;
		}

public function admin_enqueue( $hook ) {
			global $post;
			global $ewd_ufaq_controller;

if ( ! $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs' ) ) { return; }

if ( $hook != 'edit.php' and $hook != 'post-new.php' and $hook != 'post.php' ) { return; }

if ( ! isset( $post->post_type ) or $post->post_type != 'product' ) { return; }

wp_enqueue_style( 'ewd-ufaq-wc-admin-css', EWD_UFAQ_PLUGIN_URL . '/assets/css/ewd-ufaq-wc-admin.css', array(), EWD_UFAQ_VERSION );

wp_enqueue_script( 'ewd-ufaq-wc-admin-js', EWD_UFAQ_PLUGIN_URL . '/assets/js/ewd-ufaq-wc-admin.js', array( 'jquery' ), EWD_UFAQ_VERSION );

wp_localize_script(
    			'ewd-ufaq-wc-admin-js',
    			'ewd_ufaq_wc_admin',
    			array(
    				'nonce' => wp_create_nonce( 'ewd-ufaq-wc-admin-js' )
    			)
    		);
		}

public function faq_content() {
			global $product;
			global $ewd_ufaq_controller;
		
			$product_post = ( $ewd_ufaq_controller->settings->get_setting( 'woocommerce-use-product' ) and is_object( $product ) ) ? get_post( $product->get_id() ) : get_post( get_the_id() );
			
			$ufaq_product_category = get_term_by( 'name', $product_post->post_title, EWD_UFAQ_FAQ_CATEGORY_TAXONOMY );
		
			echo '<h2>' . esc_html( $ewd_ufaq_controller->settings->get_setting( 'label-woocommerce-tab' ) ) . '</h2>';
		
			$current_faqs = is_array( get_post_meta( $product_post->ID, 'EWD_UFAQ_WC_Selected_FAQs', true ) ) ? get_post_meta( $product_post->ID, 'EWD_UFAQ_WC_Selected_FAQs', true ) : array();
		
			if ( ! empty( $current_faqs ) ) {

$faq_list = implode( ',', $current_faqs );
				echo do_shortcode( "[ultimate-faqs post__in_string='". sanitize_text_field( $faq_list ) . "']" );
			}
			else {

$wc_cats = get_the_terms( $product_post, 'product_cat' );
				$ufaq_wc_category_list = '';

if ( $wc_cats ) {

foreach ( $wc_cats as $wc_cat ) {

$ufaq_wc_category = get_term_by( 'name', $wc_cat->name, EWD_UFAQ_FAQ_CATEGORY_TAXONOMY );
						if ( $ufaq_wc_category ) { $ufaq_wc_category_list .= ',' . $ufaq_wc_category->slug; }
					}
				}
				echo do_shortcode( "[ultimate-faqs include_category='". sanitize_text_field( $ufaq_product_category->slug . $ufaq_wc_category_list ) . "']" );
			}
		}

public function add_admin_product_page_faq_tab( $tabs ) {
			global $ewd_ufaq_controller;

if ( ! $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs' ) ) { return $tabs; }
			
			$args = array(
				'label' 	=> __('FAQs', 'ultimate-faqs'),
				'target' 	=> 'ewd_ufaq_faqs',
				'class' 	=> array()
			);
		
			$tabs['faqs'] = $args;
		
			return $tabs;
		}

public function add_admin_product_page_faqs() {
			global $thepostid;
			global $ewd_ufaq_controller;

if ( ! $ewd_ufaq_controller->settings->get_setting( 'woocommerce-faqs' ) ) { return $tabs; }
		
			$current_faqs = (array) get_post_meta( $thepostid, 'EWD_UFAQ_WC_Selected_FAQs', true );
		
			$all_faqs = get_posts( array( 'numberposts' => -1, 'post_type' => EWD_UFAQ_FAQ_POST_TYPE ) );
			$categories = get_terms( array( 'taxonomy' => EWD_UFAQ_FAQ_CATEGORY_TAXONOMY ) );

?>
		
			<div id='ewd_ufaq_faqs' class='panel woocommerce_options_panel'>
		
				<div class='ewd-ufaq-explanation'>
					<?php _e( 'You can use the form below to select which FAQs to display for this product, or leave it blank to use the default category naming system.', 'ultimate-faqs' ); ?>
				</div>
		
				<div id='ewd-ufaq-add-delete-faq-form-container'>

<?php foreach ( $all_faqs as $faq ) { ?>

<tr class='ewd-ufaq-faq-row' data-faqid='<?php echo esc_attr( $faq->ID ); ?>'>
										<td><input type='checkbox' class='ewd-ufaq-add-faq' name='Add_FAQs[]' value='<?php echo esc_attr( $faq->ID ); ?>'/></td>
										<td><?php echo esc_html( $faq->post_title ); ?></td>
									</tr>
								<?php } ?>

</table>
						</form>

<?php foreach ( $current_faqs as $faq_id ) { ?>

<?php $faq = get_post( $faq_id ); ?>
									<tr class='ewd-ufaq-faq-row ewd-ufaq-delete-faq-row' data-faqid='<?php echo esc_attr( $faq_id ); ?>'>
										<td><input type='checkbox' class='ewd-ufaq-delete-faq' name='Delete_FAQs[]' value='<?php echo esc_attr( $faq_id ); ?>'/></td>
										<td><?php echo esc_html( $faq->post_title ); ?></td>
									</tr>
								<?php } ?>

</table>
						</form>
						
						<button class='ewd-ufaq-delete-faq-button'><?php _e( 'Delete FAQs', 'ultimate-faqs' ); ?></button>
					</div>
				</div>
			</div>

<?php
		
		}

public function add_wc_faqs() {
				global $ewd_ufaq_controller;

if (
						! check_ajax_referer( 'ewd-ufaq-wc-admin-js', 'nonce' ) 
						|| 
						! current_user_can( $ewd_ufaq_controller->settings->get_setting( 'access-role' ) )
				) {
						ewdufaqHelper::admin_nopriv_ajax();
				}

$post_id = intval( $_POST['Post_ID'] );
		
		    $current_faqs = (array) get_post_meta( $post_id, 'EWD_UFAQ_WC_Selected_FAQs', true );
		
		    $faqs = array_map( 'absint', json_decode( stripslashes_deep( $_POST['FAQs'] ) ) );
		    if ( ! is_array( $faqs ) ) { $faqs = array(); }
		
		    $added_faqs = array();
		    foreach ( $faqs as $faq ) {

if ( in_array( $faq, $current_faqs ) ) { continue; }

$current_faqs[] = $faq;
		
		        $faq_post = get_post( $faq );
		        $added_faqs[] = array( 'ID' => $faq, 'Name' => $faq_post->post_title);
		    }
		
		    update_post_meta( $post_id, 'EWD_UFAQ_WC_Selected_FAQs', $current_faqs );
		
		    echo json_encode( $added_faqs );
		
		    die();
		}

public function delete_wc_faqs() {
			global $ewd_ufaq_controller;
			
			if (
					! check_ajax_referer( 'ewd-ufaq-wc-admin-js', 'nonce' ) 
					|| 
					! current_user_can( $ewd_ufaq_controller->settings->get_setting( 'access-role' ) )
			) {
					ewdufaqHelper::admin_nopriv_ajax();
			}

$post_id = intval( $_POST['Post_ID'] );

$current_faqs = (array) get_post_meta( $post_id, 'EWD_UFAQ_WC_Selected_FAQs', true );

$faqs = array_map( 'absint', json_decode( stripslashes_deep( $_POST['FAQs'] ) ) );
			if ( ! is_array( $faqs ) ) { $faqs = array(); }

$remaining_faqs = array_diff( $current_faqs, $faqs );

update_post_meta( $post_id, 'EWD_UFAQ_WC_Selected_FAQs', $remaining_faqs );

die();
		}

public function wc_faq_category() {
			global $ewd_ufaq_controller;

if (
					! check_ajax_referer( 'ewd-ufaq-wc-admin-js', 'nonce' ) 
					|| 
					! current_user_can( $ewd_ufaq_controller->settings->get_setting( 'access-role' ) )
			) {
					ewdufaqHelper::admin_nopriv_ajax();
			}

$cat_id = intval( $_POST['Cat_ID'] );
    
		    $args = array(
		    	'numberposts' 	=> -1, 
		    	'post_type' 	=> EWD_UFAQ_FAQ_POST_TYPE,
		    );

if ( $cat_id != '' ) {

$args['tax_query'] = array(
		        	array(
		            	'taxonomy' => EWD_UFAQ_FAQ_CATEGORY_TAXONOMY,
		            	'terms' => $cat_id
		            )
		        );
		    }

$all_faqs = get_posts( $args );

ob_start();

?>
		
		    <table class='form-table ewd-ufaq-faq-add-table'>
		    	<tr>
		    		<th><?php _e( 'Add?', 'ultimate-faqs' ); ?></th>
		    		<th><?php _e( 'FAQ', 'ultimate-faqs' ); ?></th>
		    	</tr>
		    	<?php foreach ( $all_faqs as $faq ) { ?>

<tr class='ewd-ufaq-faq-row' data-faqid='<?php echo esc_attr( $faq->ID ); ?>'>
		        		<td><input type='checkbox' class='ewd-ufaq-add-faq' name='Add_FAQs[]' value='<?php echo esc_attr( $faq->ID ); ?>'/></td>
		        		<td><?php echo esc_html( $faq->post_title ); ?></td>
		        	</tr>
		   		<?php } ?>
		    </table>

<?php

$output = ob_get_clean();
		    
		    echo $output;
		
		    die();
		}
	}
}

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