is_purchasable. Closes #1331.

classes/class-wc-cart.php

@@ -667,15 +667,9 @@ class WC_Cart {
 			if ( $product_data->is_sold_individually() )
 				$quantity = 1;
 
-			// Type/Exists check
-			if ( $product_data->is_type('external') || ! $product_data->exists() ) {
-				$woocommerce->add_error( __('This product cannot be purchased.', 'woocommerce') );
-				return false;
-			}
-
-			// Price set check
-			if( $product_data->get_price() === '' ) {
-				$woocommerce->add_error( __('This product cannot be purchased - the price is not yet set.', 'woocommerce') );
+			// Check product is_purchasable
+			if ( ! $product_data->is_purchasable() ) {
+				$woocommerce->add_error( __('Sorry, this product cannot be purchased.', 'woocommerce') );
 				return false;
 			}
 

classes/class-wc-product.php

@@ -581,6 +581,33 @@ class WC_Product {
 		return apply_filters( 'woocommerce_get_price', $this->price, $this );
 	}
 
+	/**
+	 * is_purchasable function.
+	 *
+	 * Returns false if the product cannot be bought
+	 *
+	 * @access public
+	 * @return void
+	 */
+	function is_purchasable() {
+
+		$purchasable = true;
+
+		// Products must exist of course
+		if ( ! $this->exists() )
+			$purchasable = false;
+
+		// External and grouped products cannot be bought
+		elseif ( $this->is_type( array( 'grouped', 'external' ) ) )
+			$purchasable = false;
+
+		// Other products types need a price to be set
+		elseif ( $this->get_price() === '' )
+			$purchasable = false;
+
+		return apply_filters( 'woocommerce_is_purchasable', $purchasable );
+	}
+
 	/** Returns the price (excluding tax) - ignores tax_class filters since the price may *include* tax and thus needs subtracting */
 	function get_price_excluding_tax() {
 

readme.txt

@@ -172,6 +172,7 @@ Yes you can! Join in on our [GitHub repository](http://github.com/woothemes/wooc
 * Tweak - Added generate_title_html() to settings API
 * Tweak - PayPal standard: No longer using shipping_1 because a) paypal ignore it if *any* shipping rules are within paypal, b) paypal ignore anyhing over 5 digits, so 999.99 is the max
 * Tweak - Optimised dashboard icons for retina displays
+* Tweak - added is_purchasable class method for products
 * Fix - Removed session_name from 1.6 to prevent issues when other plugins start a session first. Instead, added a KB article on how to do it manually (if needed, this is an edge case) - http://wcdocs.woothemes.com/codex/extending/multiple-installs-on-one-domain-sessions-conflictsession-sharing-workaround/
 * Fix - Product categories shortcode loop
 * Fix - selected state for variation options

templates/loop/add-to-cart.php

@@ -5,7 +5,7 @@
 
 global $product;
 
-if( $product->get_price() === '' && $product->product_type != 'external' ) return;
+if ( $product->get_price() === '' && $product->product_type != 'external' ) return;
 ?>
 
 <?php if ( ! $product->is_in_stock() ) : ?>

templates/single-product/add-to-cart/simple.php

@@ -5,7 +5,7 @@
 
 global $woocommerce, $product;
 
-if( $product->get_price() === '') return;
+if ( $product->get_price() === '' ) return;
 ?>
 
 <?php