How to Customize Woocommerce Stock Status? (17 hacks)

// Add custom stock status to products in WooCommerce
function filter_woocommerce_product_stock_status_options( $status ) {
    // Add new statuses
    $status['pre_order'] = __( 'Pre order', 'woocommerce' );
    $status['due_in_14'] = __( 'Due in stock in 14 days', 'woocommerce' );
  	$status['due_in_21'] = __( 'Due in stock in 21 days', 'woocommerce' );
    $status['due_in_31'] = __( 'Due in stock in 31 days', 'woocommerce' );
    return $status;
}
add_filter( 'woocommerce_product_stock_status_options', 'filter_woocommerce_product_stock_status_options', 10, 1 );

// Availability text
function filter_woocommerce_get_availability_text( $availability, $product ) {
    // Get stock status
    switch( $product->get_stock_status() ) {
        case 'pre_order':
            $availability = __( 'Pre order', 'woocommerce' );
        break;
        case 'due_in_14':
            $availability = __( 'Due in stock in 14 days', 'woocommerce' );
        break;
		case 'due_in_21':
            $availability = __( 'Due in stock in 21 days', 'woocommerce' );
        break;
		case 'due_in_31':
            $availability = __( 'Due in stock in 31 days', 'woocommerce' );
        break;
    }

    return $availability; 
}
add_filter( 'woocommerce_get_availability_text', 'filter_woocommerce_get_availability_text', 10, 2 );

// Availability CSS class
function filter_woocommerce_get_availability_class( $class, $product ) {
    // Get stock status
    switch( $product->get_stock_status() ) {
        case 'pre_order':
            $class = 'pre-order';
        break;
        case 'due_in_14':
            $class = 'due-in-14';
        break;
		case 'due_in_21':
            $class = 'due-in-21';
        break;
		case 'due_in_31':
            $class = 'due-in-31';
        break;
    }

    return $class;
}
add_filter( 'woocommerce_get_availability_class', 'filter_woocommerce_get_availability_class', 10, 2 );

// Admin stock html
function filter_woocommerce_admin_stock_html( $stock_html, $product ) {
    // Simple
    if ( $product->is_type( 'simple' ) ) {
        // Get stock status
        $product_stock_status = $product->get_stock_status();
    // Variable
    } elseif ( $product->is_type( 'variable' ) ) {
        foreach( $product->get_visible_children() as $variation_id ) {
            // Get product
            $variation = wc_get_product( $variation_id );
            
            // Get stock status
            $product_stock_status = $variation->get_stock_status();
            
            /*
            Currently the status of the last variant in the loop will be displayed.
            
            So from here you need to add your own logic, depending on what you expect from your custom stock status.
            
            By default, for the existing statuses. The status displayed on the admin products list table for variable products is determined as:
            
            - Product should be in stock if a child is in stock.
            - Product should be out of stock if all children are out of stock.
            - Product should be on backorder if all children are on backorder.
            - Product should be on backorder if at least one child is on backorder and the rest are out of stock.
            */
        }
    }
    
    // Stock status
    switch( $product_stock_status ) {
        case 'pre_order':
            $stock_html = '<mark class="pre-order" style="background:transparent none;color:#33ccff;font-weight:700;line-height:1;">' . __( 'Pre order', 'woocommerce' ) . '</mark>';
        break;
        case 'due_in_14':
            $stock_html = '<mark class="due-in-14" style="background:transparent none;color:#666;font-weight:700;line-height:1;">' . __( 'Due in stock in 14 days', 'woocommerce' ) . '</mark>';
        break;
		case 'due_in_21':
            $stock_html = '<mark class="due-in-21" style="background:transparent none;color:#2a2a2a;font-weight:700;line-height:1;">' . __( 'Due in stock in 21 days', 'woocommerce' ) . '</mark>';
        break;
		case 'due_in_31':
            $stock_html = '<mark class="due-in-31" style="background:transparent none;color:#2a2a2a;font-weight:700;line-height:1;">' . __( 'Due in stock in 31 days', 'woocommerce' ) . '</mark>';
        break;
    }
 
    return $stock_html;
}
add_filter( 'woocommerce_admin_stock_html', 'filter_woocommerce_admin_stock_html', 10, 2 );

// Gray out Woocommerce of stock variations
add_filter( 'woocommerce_variation_is_active', 'wpsh_disable_outofstock_variations', 10, 2 );
function wpsh_disable_outofstock_variations( $is_active, $variation ) {
    if ( ! $variation->is_in_stock() ) return false;
    return $is_active;
}

/* Display contact form instead of "Out Of Stock" message */
add_action('woocommerce_single_product_summary', 'out_of_stock_show_form', 20);
function out_of_stock_show_form() {
    global $product;
    if(!$product->is_in_stock( )) {
        echo  '<div class="your-form">';
        echo  'Unfortunately this product is out of stock.<br>Contact us for more information';
        echo  do_shortcode(''); // Replace with your own contact form shortcode
        echo  '</div>';
    }
}

/* This will display your contact form when the variation is out of stock */
add_filter( 'woocommerce_available_variation', 'variation_out_of_stock_show_form', 10, 3 );
function variation_out_of_stock_show_form( $data, $product, $variation ) {
    if( ! $data['is_in_stock'] )
    {
        $data['availability_html'] = '<div class="your-form">';
        $data['availability_html'] .= 'Unfortunately this product is out of stock.<br>Contact us for more information';
        $data['availability_html'] .= do_shortcode(''); // Replace with your own contact form shortcode
        $data['availability_html'] .= '</div>';
    }
    return $data;
}

// Hide Woocommerce product price if product is out of stock
add_filter( 'woocommerce_get_price_html', 'wpsh_hide_price_for_outofstock', 9999, 2 );
 
function wpsh_hide_price_for_outofstock( $price, $product ) {
   if ( is_admin() ) return $price; // BAIL IF BACKEND
   if ( ! $product->is_in_stock() ) {
      $price = apply_filters( 'woocommerce_empty_price_html', '', $product );
   }
   return $price;
}

// Add suffix to Woocommerce stock quantity?
add_filter( 'woocommerce_format_stock_quantity', 'wpsh_stock_suffix', 9999, 2 );
 
function wpsh_stock_suffix( $stock_quantity, $product ) {
    $stock_quantity .= ' kg'; // change accordingly
    return $stock_quantity;
}

// Change “Read more" text for Woocommerce our of stock products
add_filter( 'woocommerce_product_add_to_cart_text', 'wpsh_rename_readmore' );
  
function wpsh_rename_readmore( $text ) {
   global $product;       
   if ( $product && ! $product->is_in_stock() ) {           
      return 'Out of stock';
   } 
   return $text;
}

// Change “Out of stock" text on Woocommerce single product pages
add_filter( 'woocommerce_get_availability', 'change_out_of_stock_text_woocommerce', 1, 2);

function change_out_of_stock_text_woocommerce( $availability, $product_to_check ) {
    // Change Out of Stock Text
    if ( ! $product_to_check->is_in_stock() ) {
        $availability['availability'] = __('Sold Out', 'woocommerce');	
    }
    return $availability;
}

// Change “XX in stock" text on Woocommerce single product pages
add_filter( 'woocommerce_get_availability_text', 'wpsh_custom_availability', 99, 2 );
  
function wpsh_custom_availability( $availability, $product ) {
   $stock = $product->get_stock_quantity();
   if ( $product->is_in_stock() && $product->managing_stock() ) $availability = 'Quantity available: ' . $stock;
   return $availability;
}

// Display stock status on Woocommerce shop/archive pages
//* Enqueue scripts
add_action( 'wp_enqueue_scripts', 'wpsh_stock_status_archive', 11 );
function wpsh_stock_status_archive() {

	// Activate clip styles
	wp_enqueue_style(  'wpsh-stock-status-archive-style', 
						plugins_url( 'clip-style.css', __FILE__ ), array(),
						'1.0.0' 
	);
}

//* Add stock status to archive pages
add_action( 'woocommerce_after_shop_loop_item', 'wpsh_add_stock_status_archive', 3 );
function wpsh_add_stock_status_archive() {

    global $product;
	$availability = $append = null;

	// Add status for single products
	if( $product->is_type( 'simple' ) ) {

		$availability = $product->get_availability();
		$class = $availability[ 'class' ];
		$output = $availability[ 'availability' ];
	}

	// Add status for variable products
	elseif( $product->is_type( 'variable' ) ) {

		$status = array();

		// Get status class for each variation
		foreach ( $product->get_children() as $child_id ) {
			
				$variation = $product->get_child( $child_id );
				$availability = $variation->get_availability();
				
				// Abandon if stock management is disabled on any variation
				if( ! array_filter( $availability ) )
					return;

				$status[] = $availability[ 'class' ];
		}

		/**
		 * Compile final output and class based on
		 * availability classes set by WooCommerce
		 */
		if( in_array( 'in-stock', $status ) ) {
			$output = __( 'In stock', 'wp-clips' );
			$class = 'in-stock';
		}
		elseif( in_array( 'available-on-backorder', $status ) ) {
			$output = __( 'Available on backorder', 'wp-clips' );
			$class = 'available-on-backorder';
		}
		elseif( in_array( 'out-of-stock', $status ) ) {
			$output = __( 'Out of stock', 'wp-clips' );
			$class = 'out-of-stock';
		}

		// Append output if some items out of stock or available on backorder
		if( ( in_array( 'available-on-backorder', $status ) && $class == 'in-stock' ) ||
			( in_array( 'out-of-stock', $status ) && $class != 'out-of-stock' ) )
			$append = ' ' . __( '(some items)', 'wp-clips' );
	}

	// Output only if set 
	if( isset( $availability ) ){
		echo '<span class="archive-stock ' . esc_attr( $class ) . '">' . esc_html( $output ) . esc_html( $append ) . '</span>';	
	}
}

// Display Woocommerce variations stock on shop pages
add_action( 'woocommerce_after_shop_loop_item', 'wpsh_vartiations_stock' );
function wpsh_vartiations_stock(){
    global $product;
    if ( $product->get_type() == 'variable' ) {
        foreach ( $product->get_available_variations() as $key ) {
            $variation = wc_get_product( $key['variation_id'] );
            $stock = $variation->get_availability();
            $stock_string = $stock['availability'] ? $stock['availability'] : __( 'In stock', 'woocommerce' );
            $attr_string = array();
            foreach ( $key['attributes'] as $attr_name => $attr_value ) {
                $attr_string[] = $attr_value;
            }
            echo '<br/>' . implode( ', ', $attr_string ) . ': ' . $stock_string;
        }
    }
}

// Changes Woocommerce Single product page add to cart button only text if product is in backorder
add_filter( 'woocommerce_product_single_add_to_cart_text', 'wpsh_rename_backorder_button_single_product', 10, 2 );
function wpsh_rename_backorder_button_single_product( $text, $product ){
	if ( $product->is_on_backorder( 1 ) ) {
		$text = __( 'Pre-order', 'woocommerce' );
	}
	return $text;
}

// Changes Woocommerce category page add to cart button only text if product is in backorder
add_filter( 'woocommerce_product_add_to_cart_text', 'wpsh_rename_backorder_button_shop_page', 10, 2 );
function wpsh_rename_backorder_button_shop_page( $text, $product ){
    if ( $product->is_on_backorder( 1 ) ) {
        $text = __( 'Pre-order', 'woocommerce' );
    }
    return $text;
  }

// Change Woocommerce add to cart button text for variable products if product is avaliable on backorder
add_action( 'wp_footer', 'wpsh_change_add_to_cart_for_variations' );
function wpsh_change_add_to_cart_for_variations() {

    ?>
    <script type="text/javascript">
    jQuery(function($){
        $('input[name=variation_id].variation_id').change(function(){
            const variationID = $(this).val();
            const variationData = $('form.variations_form').data("product_variations");
            $(variationData).each(function(index,variation){
                if ( variationID == variation.variation_id ) {
                    if ( variation.backorders_allowed ) {
                        $('form.variations_form button[type=submit]').text('Pre-order');
                    } 
                }
            });
        });
    });
    </script>
    <?php
}

// Change Woocommerce “Avaliable on backorder" text
add_filter( 'woocommerce_get_availability_text', 'wpsh_change_backorder_text', 10, 2 );
function wpsh_change_backorder_text( $availability_text, $product ) {
    // Check if product status is on backorder
    if ($product->get_stock_status() === 'onbackorder') {
        $availability_text = __( '<div class="woocommerce-message">Estimated shipping time: 2 weeks</div>', 'your-text-domain' );
    }
    return $availability_text;
}

// Display Woocommerce backorder text value from custom field
// Add custom field under inventory tab
function wpsh_backorder_custom_field() {
    woocommerce_wp_text_input( array(
        'id'            => '_backorder_info',
        'label'         => __( 'Backorder info', 'woocommerce' ),
        'description'   => __( 'Enter your estimated shipping time for backorders', 'woocommerce' ),
        'desc_tip'      => 'true',
        'type'          => 'text'
    ) );
}
add_action( 'woocommerce_product_options_inventory_product_data', 'wpsh_backorder_custom_field' );

// Save custom field value in database
function wpsh_backorder_custom_field_object( $product ) {
    // Isset
    if ( isset( $_POST['_backorder_info'] ) ) {        
        // Update
        $product->update_meta_data( '_backorder_info', sanitize_text_field( $_POST['_backorder_info'] ) );
    }
}
add_action( 'woocommerce_admin_process_product_object', 'wpsh_backorder_custom_field_object', 10, 1 );

// Display Woocommerce backorder text value from custom field
add_filter( 'woocommerce_get_availability', 'wpsh_custom_on_backorder_text', 10, 2 );

function wpsh_custom_on_backorder_text( $availability, $product ) {
$backorder_text = get_post_meta( $product->get_id(), '_backorder_info', true );

if( $availability['class'] === 'available-on-backorder' && ! empty( $backorder_text ) )
    $availability['availability'] = $backorder_text;

return $availability;
}

// Display Woocommerce backorder notification on checkout page
add_action( 'woocommerce_before_checkout_form', 'wpsh_display_backorder_checkout_notice' );
function wpsh_display_backorder_checkout_notice() {
    $found = false;
    foreach( WC()->cart->get_cart() as $cart_item ) {
        if( $cart_item['data']->is_on_backorder( $cart_item['quantity'] ) ) {
            $found = true;
            break;
        }
    }
    if( $found ) {
// Change this text here. If you want it to show as default Woocommerce message notification then replace 'error' with 'notice'
        wc_print_notice( __("<strong>You have products in the cart that are available only in backorder.</strong><br> For those products estimated delivery time is 2-3 weeks.", "woocommerce"), 'error' ); 
    }
}

// Display Woocommerce backorder notification on cart page
add_action( 'woocommerce_before_cart_table', 'wpsh_display_backorder_cart_notice' );
function wpsh_display_backorder_cart_notice() {
    $found = false;
    foreach( WC()->cart->get_cart() as $cart_item ) {
        if( $cart_item['data']->is_on_backorder( $cart_item['quantity'] ) ) {
            $found = true;
            break;
        }
    }
    if( $found ) {
// Change this text here. If you want it to show as default Woocommerce message notification then replace 'error' with 'notice'
        wc_print_notice( __("<strong>You have products in the cart that are available only in backorder.</strong><br> For those products estimated delivery time is 2-3 weeks.", "woocommerce"), 'error' ); 
    }
}

// Disable Woocommerce payment gateways for bacordered products
add_filter( 'woocommerce_available_payment_gateways', 'wpsh_backordered_hide', 90, 1 );
function wpsh_backordered_hide( $available_gateways ) {
    if ( is_admin() )
        return $available_gateways;
    // Loop through cart items
    foreach( WC()->cart->get_cart() as $cart_item ){
        if( $cart_item['data']->is_on_backorder( $cart_item['quantity'] ) ) {
            unset($available_gateways['bacs']); // Hide BACS payment gateway
			unset($available_gateways['paypal']); // Hide Paypal payment gateway
            break; // Stop the loop
        }
    }

    return $available_gateways;
}

// Display stock status in cart page
add_action( 'woocommerce_after_cart_item_name', 'wpsh_display_stock_in_cart', 9999, 2 );
 
function wpsh_display_stock_in_cart( $cart_item, $cart_item_key ) {
   $product = $cart_item['data'];
   if ( $product->backorders_require_notification() && $product->is_on_backorder( $cart_item['quantity'] ) ) return;   
   echo wc_get_stock_html( $product );
}

// Display Woocommerce out of stock products last on Shop/Archive pages
add_action( 'woocommerce_product_query', 'wpsh_out_of_stock_last', 999 );
 
function wpsh_out_of_stock_last( $query ) {
    if ( is_admin() ) return;
    $query->set( 'meta_key', '_stock_status' );
    $query->set( 'orderby', array( 'meta_value' => 'ASC' ) );
}