damiencarbery · February 4, 2022 11:48
diff --git a/remove-add-to-cart-conditionally.php b/remove-add-to-cart-conditionally.php
 <?php
 /*
 Plugin Name: Remove 'Add to cart' conditionally
 Plugin URI:  https://www.damiencarbery.com/2020/03/remove-add-to-cart-conditionally/
 Description: Conditionally remove the 'Add to cart' button in WooCommerce.
 Author: Damien Carbery
 Version: 0.1
 */


 class IsPurchasableConditionalFiltering {
 	// A reference to an instance of this class.
 	private static $instance;
 	// Store whether 'Add to cart' button should be displayed.
 	private $purchasable;


 	// Returns an instance of this class. 
 	public static function get_instance() {
 		if ( null == self::$instance ) {
 			self::$instance = new IsPurchasableConditionalFiltering;
 		}
 		return self::$instance;
 	}


 	// Initialize the plugin variables.
 	public function __construct() {
 		$this->purchasable = array();

 		$this->init();
 	}


 	// Set up WordPress specfic actions.
 	public function init() {
 		add_filter( 'woocommerce_is_purchasable', array( $this, 'is_purchasable_conditionals' ), 10, 2 );
 		add_filter( 'woocommerce_variation_is_purchasable', array( $this, 'variation_is_purchasable_conditionals' ), 10, 2 );
 	}
 	
 	
 	public function is_purchasable_conditionals( $whether_purchasable, $product ) {
 		// Return cached result.
 		if ( array_key_exists( $product->get_id(), $this->purchasable ) ) {
 			return $this->purchasable[ $product->get_id() ];
 		}
 		
 		// Only do our conditional checks if WooCommerce deems the item to be purchasable.
 		if ( $whether_purchasable ) {
 			$result = true;  // Default to allowing purchase.
 			
 			// Check our specific conditions - some examples.
 			// Product over a certain price.
 			if ( $product->get_price() > 20 ) {
 				$result = false;
 			}
 			
 			// Check if product in a certain categores.
 			if ( has_term( array('hoodies', 'accessories' ), 'product_cat', $product->get_id() ) ) {
 				$result = false;
 			}
 			
 			
 			$this->purchasable[ $product->get_id() ] = $result;
 		}
 		else {
 			// Store that this item cannot be purchased.
 			$this->purchasable[ $product->get_id() ] = false;
 		}

 		return $this->purchasable[ $product->get_id() ];
 	}
 	
 	
 	public function variation_is_purchasable_conditionals( $whether_purchasable, $product ) {
 		return $whether_purchasable;
 	}
 }
 $IsPurchasableConditionalFiltering = new IsPurchasableConditionalFiltering;
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