Disables Repeat Purchase for a particular WooCommerce product

wc-disable-product-repeat-purchase.php

<?php // only copy if needed!

/**
 * Disables repeat purchase for the product
 * 
 * @param bool $purchasable true if product can be purchased
 * @param \WC_Product $product the WooCommerce product
 * @return bool $purchasable the updated is_purchasable check
 */
function sv_disable_repeat_purchase( $purchasable, $product ) {

	// Enter the ID of the product that shouldn't be purchased again
	$non_purchasable = 356;

	// Get the ID for the current product (passed in)
	$product_id = $product->get_id();

	// Bail unless the ID is equal to our desired non-purchasable product
	if ( $non_purchasable !== $product_id ) {
		return $purchasable;
	}

    // return false if the customer has bought the product
    if ( wc_customer_bought_product( get_current_user()->user_email, get_current_user_id(), $product_id ) ) {
        $purchasable = false;
    }

    return $purchasable;
}
add_filter( 'woocommerce_variation_is_purchasable', 'sv_disable_repeat_purchase', 10, 2 );
add_filter( 'woocommerce_is_purchasable', 'sv_disable_repeat_purchase', 10, 2 );


/**
 * Shows a "purchase disabled" message to the customer
 */
function sv_purchase_disabled_message() {
	global $product; // get the current product to check if purchasing should be disabled

	// Enter the ID of the product that shouldn't be purchased again
	$no_repeats_id = 356;
	$no_repeats_product = wc_get_product( $no_repeats_id );
	
	if ( $no_repeats_product->is_type( 'variation' ) ) {
		// Bail if we're not looking at the product page for the non-purchasable product
		if ( ! $no_repeats_product->get_parent_id() === $product->get_id() ) {
			return;
		}
		
		// Render the purchase restricted message if we are
		if ( wc_customer_bought_product( get_current_user()->user_email, get_current_user_id(), $no_repeats_id ) ) {
			sv_render_variation_non_purchasable_message( $product, $no_repeats_id );
		}
		
	} elseif ( $no_repeats_id === $product->get_id() ) {
		if ( wc_customer_bought_product( get_current_user()->user_email, get_current_user_id(), $no_repeats_id ) ) {
			// Create your message for the customer here
			echo '<div class="woocommerce"><div class="woocommerce-info wc-nonpurchasable-message">You\'ve already purchased this product! It can only be purchased once.</div></div>';
		}
	}
}
add_action( 'woocommerce_single_product_summary', 'sv_purchase_disabled_message', 31 );


if ( ! function_exists( 'sv_render_variation_non_purchasable_message' ) ) :
/**
 * Generates a "purchase disabled" message to the customer for specific variations
 * 
 * @param \WC_Product $product the WooCommerce product
 * @param int $no_repeats_id the id of the non-purchasable product
 */
function sv_render_variation_non_purchasable_message( $product, $no_repeats_id ) {

	// Double-check we're looking at a variable product
	if ( $product->is_type( 'variable' ) && $product->has_child() ) {
		$variation_purchasable = true;

		foreach ( $product->get_available_variations() as $variation ) {

			// only show this message for non-purchasable variations matching our ID
			if ( $no_repeats_id === $variation['variation_id'] ) {
				$variation_purchasable = false;	
				// edit your customer message here
				echo '<div class="woocommerce"><div class="woocommerce-info wc-nonpurchasable-message js-variation-' . sanitize_html_class( $variation['variation_id'] ) . '">You\'ve already purchased this product! It can only be purchased once.</div></div>';
			}
		}
	}

	// show / hide this message for the right variation with some jQuery magic
	if ( ! $variation_purchasable ) {
		wc_enqueue_js("
			jQuery('.variations_form')
				.on( 'woocommerce_variation_select_change', function( event ) {
					jQuery('.wc-nonpurchasable-message').hide();
				})
				.on( 'found_variation', function( event, variation ) {
					jQuery('.wc-nonpurchasable-message').hide();
					if ( ! variation.is_purchasable ) {
						jQuery( '.wc-nonpurchasable-message.js-variation-' + variation.variation_id ).show();
					}
				})
			.find( '.variations select' ).change();
		");
	}
}
endif;